{"id":21583,"date":"2026-02-19T22:02:22","date_gmt":"2026-02-19T14:02:22","guid":{"rendered":"https:\/\/viox.com\/?p=21583"},"modified":"2026-02-19T22:02:25","modified_gmt":"2026-02-19T14:02:25","slug":"vfd-vs-soft-starter-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/vfd-vs-soft-starter-guide\/","title":{"rendered":"VFD so v\u1edbi Kh\u1edfi \u0111\u1ed9ng m\u1ec1m: H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 cho k\u1ef9 s\u01b0"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>L\u1ef1a Ch\u1ecdn Quan Tr\u1ecdng Quy\u1ebft \u0110\u1ecbnh Hi\u1ec7u Su\u1ea5t H\u1ec7 Th\u1ed1ng<\/h2>\n<p>Khi m\u1ed9t \u0111\u1ed9ng c\u01a1 qu\u1ea1t c\u00f4ng nghi\u1ec7p 500 HP kh\u1edfi \u0111\u1ed9ng, n\u00f3 c\u00f3 th\u1ec3 ti\u00eau th\u1ee5 600% d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c\u2014\u0111\u1ee7 \u0111\u1ec3 l\u00e0m m\u1edd \u0111\u00e8n tr\u00ean to\u00e0n b\u1ed9 c\u01a1 s\u1edf v\u00e0 g\u00e2y \u00e1p l\u1ef1c l\u00ean c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 kh\u00ed \u0111\u1ebfn gi\u1edbi h\u1ea1n c\u1ee7a ch\u00fang. Kho\u1ea3nh kh\u1eafc kh\u1edfi \u0111\u1ed9ng duy nh\u1ea5t n\u00e0y x\u00e1c \u0111\u1ecbnh t\u1ea1i sao vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 l\u1ea1i quan tr\u1ecdng. Bi\u1ebfn t\u1ea7n (VFD) v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m \u0111\u1ec1u gi\u1ea3i quy\u1ebft th\u00e1ch th\u1ee9c n\u00e0y, nh\u01b0ng ch\u00fang th\u1ef1c hi\u1ec7n theo nh\u1eefng c\u00e1ch kh\u00e1c nhau v\u1ec1 c\u01a1 b\u1ea3n, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng, m\u1ee9c ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng v\u00e0 t\u1ed5ng chi ph\u00ed s\u1edf h\u1eefu trong nhi\u1ec1u th\u1eadp k\u1ef7 t\u1edbi.<\/p>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i r\u1ea5t \u0111\u01a1n gi\u1ea3n: <strong>kh\u1edfi \u0111\u1ed9ng m\u1ec1m ch\u1ec9 \u0111i\u1ec1u khi\u1ec3n vi\u1ec7c kh\u1edfi \u0111\u1ed9ng v\u00e0 d\u1eebng \u0111\u1ed9ng c\u01a1 b\u1eb1ng c\u00e1ch t\u0103ng d\u1ea7n \u0111i\u1ec7n \u00e1p, trong khi VFD \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 li\u00ean t\u1ee5c trong su\u1ed1t qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i c\u1ea3 t\u1ea7n s\u1ed1 v\u00e0 \u0111i\u1ec7n \u00e1p<\/strong>. S\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y lan t\u1ecfa v\u00e0o m\u1ecdi kh\u00eda c\u1ea1nh c\u1ee7a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, t\u1eeb chi ph\u00ed v\u1ed1n ban \u0111\u1ea7u \u0111\u1ebfn ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng d\u00e0i h\u1ea1n, khi\u1ebfn quy\u1ebft \u0111\u1ecbnh l\u1ef1a ch\u1ecdn tr\u1edf n\u00ean quan tr\u1ecdng h\u01a1n nhi\u1ec1u so v\u1edbi nh\u1eefng g\u00ec nhi\u1ec1u k\u1ef9 s\u01b0 ban \u0111\u1ea7u nh\u1eadn ra.<\/p>\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<ul>\n<li><strong>Kh\u1edfi \u0111\u1ed9ng m\u1ec1m<\/strong> gi\u1ea3m d\u00f2ng kh\u1edfi \u0111\u1ed9ng v\u00e0 \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 b\u1eb1ng c\u00e1ch t\u0103ng d\u1ea7n \u0111i\u1ec7n \u00e1p trong 2-5 gi\u00e2y, l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh v\u1edbi c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 ng\u00e2n s\u00e1ch<\/li>\n<li><strong>VFDs<\/strong> cung c\u1ea5p kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 li\u00ean t\u1ee5c b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh c\u1ea3 t\u1ea7n s\u1ed1 v\u00e0 \u0111i\u1ec7n \u00e1p, mang l\u1ea1i kh\u1ea3 n\u0103ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng l\u00ean \u0111\u1ebfn 50% trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i thay \u0111\u1ed5i m\u1eb7c d\u00f9 chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n 2-3 l\u1ea7n<\/li>\n<li><strong>Ph\u00e2n t\u00edch chi ph\u00ed<\/strong> cho th\u1ea5y VFD th\u01b0\u1eddng \u0111\u1ea1t \u0111\u01b0\u1ee3c ROI trong v\u00f2ng 18-36 th\u00e1ng \u0111\u1ed1i v\u1edbi t\u1ea3i m\u00f4-men xo\u1eafn thay \u0111\u1ed5i (qu\u1ea1t, m\u00e1y b\u01a1m), trong khi kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u1eabn kinh t\u1ebf h\u01a1n cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh<\/li>\n<li><strong>L\u1ef1a ch\u1ecdn \u1ee9ng d\u1ee5ng<\/strong> ph\u1ee5 thu\u1ed9c v\u00e0o ba y\u1ebfu t\u1ed1: nhu c\u1ea7u thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9, \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u h\u00ecnh t\u1ea3i v\u00e0 ph\u00e2n t\u00edch t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/li>\n<li><strong>Ti\u00eau chu\u1ea9n tu\u00e2n<\/strong> y\u00eau c\u1ea7u tu\u00e2n th\u1ee7 lo\u1ea1t ti\u00eau chu\u1ea9n IEC 61800 cho VFD v\u00e0 ph\u1ed1i h\u1ee3p th\u00edch h\u1ee3p v\u1edbi <a href=\"https:\/\/test.viox.com\/vi\/homeowners-guide-to-circuit-breaker-sizing-and-load-calculation\/\">\u0111\u1ecbnh c\u1ee1 b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/types-of-motor-starters-selection-guide\/\">thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1<\/a><\/li>\n<\/ul>\n<h2>T\u00ecm Hi\u1ec3u C\u00e1c C\u00f4ng Ngh\u1ec7 C\u01a1 B\u1ea3n<\/h2>\n<h3>C\u00e1ch Kh\u1edfi \u0110\u1ed9ng M\u1ec1m Ho\u1ea1t \u0110\u1ed9ng<\/h3>\n<p>Kh\u1edfi \u0111\u1ed9ng m\u1ec1m s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 thyristor (SCR) \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p \u0111\u1eb7t v\u00e0o \u0111\u1ed9ng c\u01a1 trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng v\u00e0 t\u1eaft m\u00e1y. B\u1eb1ng c\u00e1ch k\u00edch ho\u1ea1t c\u00e1c c\u00f4ng t\u1eafc b\u00e1n d\u1eabn \u1edf c\u00e1c kho\u1ea3ng th\u1eddi gian ch\u00ednh x\u00e1c, ch\u00fang t\u0103ng d\u1ea7n \u0111i\u1ec7n \u00e1p t\u1eeb m\u1ee9c gi\u1ea3m xu\u1ed1ng \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c \u0111\u1ea7y \u0111\u1ee7 trong m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh\u2014th\u01b0\u1eddng l\u00e0 2 \u0111\u1ebfn 5 gi\u00e2y. Gia t\u1ed1c \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t n\u00e0y l\u00e0m gi\u1ea3m s\u1ed1c c\u01a1 h\u1ecdc tr\u00ean thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ed9ng v\u00e0 h\u1ea1n ch\u1ebf \u1ee9ng su\u1ea5t \u0111i\u1ec7n tr\u00ean h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n.<\/p>\n<p>Ho\u1ea1t \u0111\u1ed9ng n\u00e0y \u0111\u01a1n gi\u1ea3n m\u1ed9t c\u00e1ch thanh l\u1ecbch: trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng, kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u1eabn \u1edf trong m\u1ea1ch, \u0111i\u1ec1u khi\u1ec3n d\u00f2ng \u0111i\u1ec7n. Khi \u0111\u1ed9ng c\u01a1 \u0111\u1ea1t t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a, nhi\u1ec1u thi\u1ebft k\u1ebf s\u1eed d\u1ee5ng m\u1ed9t contactor b\u1ecf qua \u0111\u1ec3 \u0111\u1ecbnh tuy\u1ebfn ngu\u1ed3n tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9ng c\u01a1, lo\u1ea1i b\u1ecf s\u1ef1 sinh nhi\u1ec7t v\u00e0 t\u1ed5n th\u1ea5t hi\u1ec7u su\u1ea5t trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng. T\u00ednh n\u0103ng b\u1ecf qua n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c, n\u01a1i ngay c\u1ea3 nh\u1eefng t\u1ed5n th\u1ea5t hi\u1ec7u su\u1ea5t nh\u1ecf c\u0169ng t\u00edch l\u0169y th\u00e0nh chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng \u0111\u00e1ng k\u1ec3.<\/p>\n<figure style=\"text-align: center; margin: 30px 0;\"><img decoding=\"async\" style=\"display: block; margin: 0 auto; max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Soft-starter-circuit-diagram-showing-thyristor-control-and-voltage-ramp-profile-for-reduced-inrush-current-motor-starting.webp\" alt=\"Soft starter circuit diagram showing thyristor control and voltage ramp profile for reduced inrush current motor starting\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">S\u01a1 \u0111\u1ed3 minh h\u1ecda nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t kh\u1edfi \u0111\u1ed9ng m\u1ec1m, l\u00e0m n\u1ed5i b\u1eadt ph\u1ea7n ngu\u1ed3n thyristor, logic \u0111i\u1ec1u khi\u1ec3n v\u00e0 c\u1ea5u h\u00ecnh \u0111i\u1ec7n \u00e1p\/d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec3n h\u00ecnh trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1.<\/figcaption><\/figure>\n<h3>C\u00e1ch VFD Ho\u1ea1t \u0110\u1ed9ng<\/h3>\n<p>VFD s\u1eed d\u1ee5ng quy tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n ba giai \u0111o\u1ea1n ph\u1ee9c t\u1ea1p h\u01a1n. \u0110\u1ea7u ti\u00ean, m\u1ed9t b\u1ed9 ch\u1ec9nh l\u01b0u chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n AC \u0111\u1ebfn th\u00e0nh DC. Th\u1ee9 hai, m\u1ed9t bus DC v\u1edbi c\u00e1c t\u1ee5 \u0111i\u1ec7n l\u1ecdc v\u00e0 \u1ed5n \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p DC n\u00e0y. Th\u1ee9 ba, m\u1ed9t ph\u1ea7n ngh\u1ecbch l\u01b0u s\u1eed d\u1ee5ng Transistor L\u01b0\u1ee1ng C\u1ef1c C\u1ed5ng C\u00e1ch \u0110i\u1ec7n (IGBT) \u0111\u1ec3 t\u00e1i t\u1ea1o \u0111\u1ea7u ra AC t\u1ea7n s\u1ed1 thay \u0111\u1ed5i, \u0111i\u1ec7n \u00e1p thay \u0111\u1ed5i, \u0111i\u1ec1u khi\u1ec3n ch\u00ednh x\u00e1c t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1.<\/p>\n<p>Ki\u1ebfn tr\u00fac n\u00e0y cho ph\u00e9p VFD \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 t\u1eeb 0% \u0111\u1ebfn 100% t\u1ed1c \u0111\u1ed9 \u0111\u1ecbnh m\u1ee9c v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u01b0\u1ee3t tr\u1ed9i. Theo ti\u00eau chu\u1ea9n IEC 61800-5-1, VFD hi\u1ec7n \u0111\u1ea1i ph\u1ea3i k\u1ebft h\u1ee3p c\u00e1c t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n bao g\u1ed3m qu\u00e1 d\u00f2ng, qu\u00e1 \u00e1p, d\u01b0\u1edbi \u00e1p v\u00e0 gi\u00e1m s\u00e1t nhi\u1ec7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o v\u1eadn h\u00e0nh an to\u00e0n tr\u00ean to\u00e0n b\u1ed9 ph\u1ea1m vi t\u1ed1c \u0111\u1ed9. Kh\u1ea3 n\u0103ng kh\u1edbp ch\u00ednh x\u00e1c t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 v\u1edbi y\u00eau c\u1ea7u t\u1ea3i l\u00e0 \u0111i\u1ec1u cho ph\u00e9p ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng \u0111\u00e1ng k\u1ec3 m\u00e0 VFD \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn.<\/p>\n<figure style=\"text-align: center; margin: 30px 0;\"><img decoding=\"async\" style=\"display: block; margin: 0 auto; max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/VFD-architecture-diagram-showing-rectifier-DC-bus-and-inverter-stages-with-control-circuit-for-variable-frequency-motor-control.webp\" alt=\"VFD architecture diagram showing rectifier, DC bus, and inverter stages with control circuit for variable frequency motor control\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">M\u1ed9t s\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt chi ti\u1ebft gi\u1edbi thi\u1ec7u ki\u1ebfn tr\u00fac ba giai \u0111o\u1ea1n c\u1ee7a VFD, bao g\u1ed3m b\u1ed9 ch\u1ec9nh l\u01b0u, bus DC v\u00e0 c\u00e1c m\u00f4-\u0111un ngh\u1ecbch l\u01b0u IGBT.<\/figcaption><\/figure>\n<h2>So S\u00e1nh To\u00e0n Di\u1ec7n: VFD so v\u1edbi Kh\u1edfi \u0110\u1ed9ng M\u1ec1m<\/h2>\n<figure style=\"text-align: center; margin: 30px 0;\"><img decoding=\"async\" style=\"display: block; margin: 0 auto; max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Cutaway-comparison-of-VFD-and-soft-starter-showing-internal-complexity-difference-and-relative-size-for-motor-control-applications-viox.webp\" alt=\"Cutaway comparison of VFD and soft starter showing internal complexity difference and relative size for motor control applications\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">H\u00ecnh \u1ea3nh c\u1eaft ngang c\u1ea1nh nhau cho th\u1ea5y s\u1ef1 ph\u1ee9c t\u1ea1p v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u1ed1i gi\u1eefa VFD (b\u00ean tr\u00e1i) v\u00e0 Kh\u1edfi \u0110\u1ed9ng M\u1ec1m (b\u00ean ph\u1ea3i).<\/figcaption><\/figure>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 10px;\">N\u0103ng<\/th>\n<th style=\"padding: 10px;\">Kh\u1edfi \u0111\u1ed9ng m\u1ec1m<\/th>\n<th style=\"padding: 10px;\">Bi\u1ebfn T\u1ea7n (VFD)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>Ch\u1ee9c n\u0103ng ch\u00ednh<\/strong><\/td>\n<td style=\"padding: 10px;\">Ch\u1ec9 \u0111i\u1ec1u khi\u1ec3n kh\u1edfi \u0111\u1ed9ng v\u00e0 d\u1eebng<\/td>\n<td style=\"padding: 10px;\">\u0110i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 li\u00ean t\u1ee5c trong to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u0110i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9<\/strong><\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 sau khi kh\u1edfi \u0111\u1ed9ng<\/td>\n<td style=\"padding: 10px;\">\u0110i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 \u0111\u1ea7y \u0111\u1ee7 t\u1eeb 0-100%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Hi\u1ec7u qu\u1ea3 n\u0103ng l\u01b0\u1ee3ng<\/strong><\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh<\/td>\n<td style=\"padding: 10px;\">Ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng l\u00ean \u0111\u1ebfn 50% trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i thay \u0111\u1ed5i<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Ban \u0110\u1ea7u Chi Ph\u00ed<\/strong><\/td>\n<td style=\"padding: 10px;\">Th\u1ea5p h\u01a1n (c\u01a1 b\u1ea3n)<\/td>\n<td style=\"padding: 10px;\">Cao h\u01a1n 2-3 l\u1ea7n so v\u1edbi kh\u1edfi \u0111\u1ed9ng m\u1ec1m<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Chi ph\u00ed v\u1eadn h\u00e0nh<\/strong><\/td>\n<td style=\"padding: 10px;\">Ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng cao h\u01a1n<\/td>\n<td style=\"padding: 10px;\">Ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p h\u01a1n v\u1edbi \u1ee9ng d\u1ee5ng th\u00edch h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Di\u1ec7n t\u00edch<\/strong><\/td>\n<td style=\"padding: 10px;\">Nh\u1ecf g\u1ecdn, v\u1ecf nh\u1ecf h\u01a1n<\/td>\n<td style=\"padding: 10px;\">L\u1edbn h\u01a1n, y\u00eau c\u1ea7u nhi\u1ec1u kh\u00f4ng gian b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Sinh nhi\u1ec7t<\/strong><\/td>\n<td style=\"padding: 10px;\">T\u1ed1i thi\u1ec3u (\u0111\u1eb7c bi\u1ec7t v\u1edbi b\u1ecf qua)<\/td>\n<td style=\"padding: 10px;\">V\u1eeba ph\u1ea3i, y\u00eau c\u1ea7u xem x\u00e9t l\u00e0m m\u00e1t<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Gi\u1ea3m D\u00f2ng Kh\u1edfi \u0110\u1ed9ng<\/strong><\/td>\n<td style=\"padding: 10px;\">C\u00f3, t\u0103ng t\u1ed1c 2-5 gi\u00e2y<\/td>\n<td style=\"padding: 10px;\">C\u00f3, v\u1edbi kh\u1ea3 n\u0103ng t\u0103ng t\u1ed1c c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u0110i\u1ec1u Khi\u1ec3n M\u00f4-men Xo\u1eafn<\/strong><\/td>\n<td style=\"padding: 10px;\">Gi\u1edbi h\u1ea1n \u1edf kh\u1edfi \u0111\u1ed9ng\/t\u1eaft m\u00e1y<\/td>\n<td style=\"padding: 10px;\">\u0110i\u1ec1u khi\u1ec3n ch\u00ednh x\u00e1c trong su\u1ed1t qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>S\u00f3ng h\u00e0i<\/strong><\/td>\n<td style=\"padding: 10px;\">Ti\u00eam h\u00e0i th\u1ea5p<\/td>\n<td style=\"padding: 10px;\">H\u00e0i b\u1eadc cao h\u01a1n, c\u00f3 th\u1ec3 y\u00eau c\u1ea7u l\u1ecdc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>B\u1ea3o tr\u00ec<\/strong><\/td>\n<td style=\"padding: 10px;\">\u0110\u1ed9 ph\u1ee9c t\u1ea1p th\u1ea5p h\u01a1n, \u00edt th\u00e0nh ph\u1ea7n h\u01a1n<\/td>\n<td style=\"padding: 10px;\">Ph\u1ee9c t\u1ea1p h\u01a1n, y\u00eau c\u1ea7u ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/strong><\/td>\n<td style=\"padding: 10px;\">M\u00e1y b\u01a1m, m\u00e1y n\u00e9n, b\u0103ng t\u1ea3i t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh<\/td>\n<td style=\"padding: 10px;\">Qu\u1ea1t, m\u00e1y b\u01a1m, \u0111i\u1ec1u khi\u1ec3n quy tr\u00ecnh t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>L\u1ed9 tr\u00ecnh ho\u00e0n v\u1ed1n \u0111\u1ea7u t\u01b0 (ROI)<\/strong><\/td>\n<td style=\"padding: 10px;\">Kh\u00f4ng \u00e1p d\u1ee5ng (kh\u00f4ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng)<\/td>\n<td style=\"padding: 10px;\">18-36 th\u00e1ng \u0111\u1ed1i v\u1edbi t\u1ea3i m\u00f4-men xo\u1eafn thay \u0111\u1ed5i<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Ti\u00eau Chu\u1ea9n Tu\u00e2n<\/strong><\/td>\n<td style=\"padding: 10px;\">C\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 c\u01a1 b\u1ea3n<\/td>\n<td style=\"padding: 10px;\">Lo\u1ea1t ti\u00eau chu\u1ea9n IEC 61800, y\u00eau c\u1ea7u EMC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Khi N\u00e0o N\u00ean Ch\u1ecdn Kh\u1edfi \u0110\u1ed9ng M\u1ec1m<\/h2>\n<h3>\u1ee8ng d\u1ee5ng l\u00fd t\u01b0\u1edfng<\/h3>\n<p>Kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u01b0\u1ee3t tr\u1ed9i trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i sau khi kh\u1edfi \u0111\u1ed9ng nh\u01b0ng y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 kh\u1ecfi d\u00f2ng kh\u1edfi \u0111\u1ed9ng cao. H\u00e3y c\u00e2n nh\u1eafc m\u1ed9t kh\u1edfi \u0111\u1ed9ng m\u1ec1m khi:<\/p>\n<p><strong>H\u1ec7 th\u1ed1ng b\u01a1m t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh<\/strong> n\u01a1i t\u1ed1c \u0111\u1ed9 d\u00f2ng ch\u1ea3y v\u1eabn kh\u00f4ng \u0111\u1ed5i v\u00e0 m\u1ed1i quan t\u00e2m ch\u00ednh l\u00e0 gi\u1ea3m b\u00faa n\u01b0\u1edbc v\u00e0 \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc tr\u00ean h\u1ec7 th\u1ed1ng \u0111\u01b0\u1eddng \u1ed1ng. Ph\u00e2n ph\u1ed1i n\u01b0\u1edbc \u0111\u00f4 th\u1ecb, h\u1ec7 th\u1ed1ng ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u00e1p su\u1ea5t kh\u00f4ng \u0111\u1ed5i \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb gia t\u1ed1c nh\u1eb9 nh\u00e0ng m\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m cung c\u1ea5p m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i.<\/p>\n<p><strong>B\u0103ng t\u1ea3i truy\u1ec1n \u0111\u1ed9ng b\u1eb1ng d\u00e2y \u0111ai<\/strong> ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh nh\u01b0ng y\u00eau c\u1ea7u gia t\u1ed1c d\u1ea7n d\u1ea7n \u0111\u1ec3 ng\u0103n tr\u01b0\u1ee3t d\u00e2y \u0111ai v\u00e0 gi\u1ea3m c\u00e1c \u0111\u1ec9nh c\u0103ng c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 kh\u00ed. \u0110\u1ed9 d\u1ed1c m\u00f4-men xo\u1eafn \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1ea3o v\u1ec7 h\u1ed9p s\u1ed1, v\u00f2ng bi v\u00e0 h\u1ec7 th\u1ed1ng kh\u1edbp n\u1ed1i kh\u1ecfi c\u00e1c l\u1ef1c ph\u00e1 h\u1ee7y c\u1ee7a vi\u1ec7c kh\u1edfi \u0111\u1ed9ng t\u1ee9c th\u00ec.<\/p>\n<p><strong>M\u00e1y n\u00e9n l\u1edbn<\/strong> trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 nhu c\u1ea7u kh\u00ed n\u00e9n v\u1eabn t\u01b0\u01a1ng \u0111\u1ed1i kh\u00f4ng \u0111\u1ed5i. Kh\u1edfi \u0111\u1ed9ng m\u1ec1m l\u00e0m gi\u1ea3m \u1ee9ng su\u1ea5t \u0111i\u1ec7n tr\u00ean h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i \u0111\u1ed3ng th\u1eddi b\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 kh\u00ed kh\u1ecfi t\u1ea3i tr\u1ecdng s\u1ed1c trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng.<\/p>\n<p><strong>C\u00e1c c\u00e0i \u0111\u1eb7t b\u1ecb h\u1ea1n ch\u1ebf v\u1ec1 kh\u00f4ng gian<\/strong> n\u01a1i kh\u00f4ng gian t\u1ee7 \u0111i\u1ec7n b\u1ecb h\u1ea1n ch\u1ebf v\u00e0 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn c\u1ee7a b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m mang l\u1ea1i l\u1ee3i th\u1ebf thi\u1ebft th\u1ef1c. Khi k\u1ebft h\u1ee3p v\u1edbi contactor bypass, b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m c\u00f3 th\u1ec3 c\u1ef1c k\u1ef3 nh\u1ecf g\u1ecdn m\u00e0 v\u1eabn cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 thi\u1ebft y\u1ebfu.<\/p>\n<h3>Nh\u1eefng c\u00e2n nh\u1eafc v\u1ec1 kinh t\u1ebf<\/h3>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh, b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m th\u01b0\u1eddng c\u00f3 chi ph\u00ed th\u1ea5p h\u01a1n 30-40% so v\u1edbi VFD t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn kinh t\u1ebf khi kh\u00f4ng y\u00eau c\u1ea7u thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9. M\u1ed9t b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m 50 HP c\u00f3 th\u1ec3 c\u00f3 gi\u00e1 kho\u1ea3ng 800-1.200 \u0111\u00f4 la, trong khi m\u1ed9t VFD t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00f3 th\u1ec3 c\u00f3 gi\u00e1 2.000-3.500 \u0111\u00f4 la. Khi kh\u00f4ng th\u1ec3 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u1eadn h\u00e0nh, chi ph\u00ed \u0111\u1ea7u t\u01b0 ban \u0111\u1ea7u th\u1ea5p h\u01a1n khi\u1ebfn b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn r\u00f5 r\u00e0ng.<\/p>\n<h2>Khi n\u00e0o n\u00ean ch\u1ecdn VFD<\/h2>\n<figure style=\"text-align: center; margin: 30px 0;\"><img decoding=\"async\" style=\"display: block; margin: 0 auto; max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/11kw-Three-Phase-Inverter-for-Industrial-Applications-Vfd.webp\" alt=\"11kW Three-Phase Inverter for Industrial Applications (VFD)\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 10px; font-size: 0.9em;\">M\u1ed9t b\u1ed9 bi\u1ebfn t\u1ea7n (VFD) 11kW \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, cung c\u1ea5p kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 li\u1ec1n m\u1ea1ch v\u00e0 ch\u00ednh x\u00e1c.<\/figcaption><\/figure>\n<h3>\u1ee8ng d\u1ee5ng l\u00fd t\u01b0\u1edfng<\/h3>\n<p>VFD mang l\u1ea1i gi\u00e1 tr\u1ecb t\u1ed1i \u0111a trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 t\u1ea3i thay \u0111\u1ed5i v\u00e0 t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u. Ti\u1ec1m n\u0103ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng l\u00e0 r\u1ea5t l\u1edbn:<\/p>\n<p><strong>H\u1ec7 th\u1ed1ng qu\u1ea1t HVAC<\/strong> \u0111\u1ea1i di\u1ec7n cho \u1ee9ng d\u1ee5ng VFD \u0111i\u1ec3n h\u00ecnh. M\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng c\u1ee7a qu\u1ea1t tu\u00e2n theo quy lu\u1eadt l\u1eadp ph\u01b0\u01a1ng\u2014gi\u1ea3m t\u1ed1c \u0111\u1ed9 20% s\u1ebd gi\u1ea3m m\u1ee9c ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng g\u1ea7n 50%. M\u1ed9t qu\u1ea1t 500 HP ho\u1ea1t \u0111\u1ed9ng trong kho\u1ea3ng t\u1ed1c \u0111\u1ed9 30-80% c\u00f3 th\u1ec3 t\u1ea1o ra kho\u1ea3n ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng h\u00e0ng n\u0103m h\u01a1n 100.000 \u0111\u00f4 la, \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u1eddi gian ho\u00e0n v\u1ed1n VFD d\u01b0\u1edbi hai n\u0103m. \u0110i\u1ec1u n\u00e0y l\u00e0m cho VFD tr\u1edf n\u00ean b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ch\u1ec9nh l\u01b0u l\u01b0\u1ee3ng gi\u00f3 (VAV) v\u00e0 b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o c\u00f3 y\u00eau c\u1ea7u th\u00f4ng gi\u00f3 kh\u00e1c nhau.<\/p>\n<p><strong>B\u01a1m l\u01b0u l\u01b0\u1ee3ng thay \u0111\u1ed5i<\/strong> n\u01a1i nhu c\u1ea7u dao \u0111\u1ed9ng trong su\u1ed1t c\u1ea3 ng\u00e0y ho\u1eb7c m\u00f9a. Thay v\u00ec s\u1eed d\u1ee5ng van ti\u1ebft l\u01b0u \u0111\u1ec3 ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng (g\u00e2y l\u00e3ng ph\u00ed n\u0103ng l\u01b0\u1ee3ng), VFD \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 b\u01a1m \u0111\u1ec3 ph\u00f9 h\u1ee3p ch\u00ednh x\u00e1c v\u1edbi nhu c\u1ea7u. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y lo\u1ea1i b\u1ecf t\u1ed5n th\u1ea5t do ti\u1ebft l\u01b0u v\u00e0 gi\u1ea3m \u0111\u00e1ng k\u1ec3 m\u1ee9c ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 b\u01a1m th\u00e1p gi\u1ea3i nhi\u1ec7t, h\u1ec7 th\u1ed1ng n\u01b0\u1edbc quy tr\u00ecnh v\u00e0 t\u01b0\u1edbi ti\u00eau.<\/p>\n<p><strong>C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec1u khi\u1ec3n quy tr\u00ecnh<\/strong> y\u00eau c\u1ea7u \u0111i\u1ec1u ch\u1ec9nh t\u1ed1c \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m. M\u00e1y \u0111\u00f9n, m\u00e1y tr\u1ed9n, b\u0103ng t\u1ea3i c\u00f3 th\u00f4ng l\u01b0\u1ee3ng thay \u0111\u1ed5i v\u00e0 h\u1ec7 th\u1ed1ng x\u1eed l\u00fd v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e0 VFD cung c\u1ea5p. Kh\u1ea3 n\u0103ng duy tr\u00ec t\u1ed1c \u0111\u1ed9 ch\u00ednh x\u00e1c b\u1ea5t k\u1ec3 s\u1ef1 thay \u0111\u1ed5i t\u1ea3i tr\u1ecdng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m nh\u1ea5t qu\u00e1n.<\/p>\n<p><strong>C\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u nhi\u1ec1u \u0111i\u1ec3m \u0111\u1eb7t t\u1ed1c \u0111\u1ed9<\/strong> ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e1y c\u00f4ng c\u1ee5, thi\u1ebft b\u1ecb \u0111\u00f3ng g\u00f3i v\u00e0 h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng. VFD c\u00f3 th\u1ec3 l\u01b0u tr\u1eef nhi\u1ec1u c\u00e0i \u0111\u1eb7t tr\u01b0\u1edbc t\u1ed1c \u0111\u1ed9 v\u00e0 chuy\u1ec3n \u0111\u1ed5i m\u01b0\u1ee3t m\u00e0 gi\u1eefa ch\u00fang, cho ph\u00e9p c\u00e1c c\u1ea5u h\u00ecnh chuy\u1ec3n \u0111\u1ed9ng ph\u1ee9c t\u1ea1p m\u00e0 \u0111\u1ed9ng c\u01a1 t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c.<\/p>\n<h3>Ph\u00e2n t\u00edch ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng<\/h3>\n<p>Kh\u00f4ng th\u1ec3 \u0111\u00e1nh gi\u00e1 qu\u00e1 cao ti\u1ec1m n\u0103ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng c\u1ee7a VFD trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00f4-men xo\u1eafn thay \u0111\u1ed5i. \u0110\u1ed1i v\u1edbi t\u1ea3i ly t\u00e2m (qu\u1ea1t v\u00e0 m\u00e1y b\u01a1m), c\u00e1c \u0111\u1ecbnh lu\u1eadt t\u01b0\u01a1ng t\u1ef1 chi ph\u1ed1i m\u1ed1i quan h\u1ec7 gi\u1eefa t\u1ed1c \u0111\u1ed9 v\u00e0 c\u00f4ng su\u1ea5t:<\/p>\n<ul>\n<li>L\u01b0u l\u01b0\u1ee3ng thay \u0111\u1ed5i tr\u1ef1c ti\u1ebfp v\u1edbi t\u1ed1c \u0111\u1ed9<\/li>\n<li>\u00c1p su\u1ea5t thay \u0111\u1ed5i theo b\u00ecnh ph\u01b0\u01a1ng t\u1ed1c \u0111\u1ed9<\/li>\n<li>C\u00f4ng su\u1ea5t thay \u0111\u1ed5i theo l\u1eadp ph\u01b0\u01a1ng t\u1ed1c \u0111\u1ed9<\/li>\n<\/ul>\n<p>M\u1ed1i quan h\u1ec7 l\u1eadp ph\u01b0\u01a1ng n\u00e0y c\u00f3 ngh\u0129a l\u00e0 v\u1eadn h\u00e0nh qu\u1ea1t \u1edf t\u1ed1c \u0111\u1ed9 80% s\u1ebd gi\u1ea3m m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng xu\u1ed1ng kho\u1ea3ng 51% c\u00f4ng su\u1ea5t \u1edf t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a\u2014gi\u1ea3m 49% n\u0103ng l\u01b0\u1ee3ng. \u0110\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1 qu\u1ea1t 100 HP ho\u1ea1t \u0111\u1ed9ng 6.000 gi\u1edd m\u1ed7i n\u0103m v\u1edbi gi\u00e1 0,10 \u0111\u00f4 la\/kWh, \u0111i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi kho\u1ea3n ti\u1ebft ki\u1ec7m h\u00e0ng n\u0103m h\u01a1n 21.000 \u0111\u00f4 la. V\u1edbi chi ph\u00ed VFD c\u00f3 l\u1ebd l\u00e0 8.000-12.000 \u0111\u00f4 la, th\u1eddi gian ho\u00e0n v\u1ed1n x\u1ea3y ra trong v\u00f2ng ch\u01b0a \u0111\u1ea7y m\u1ed9t n\u0103m.<\/p>\n<h2>C\u00e1c c\u00e2n nh\u1eafc k\u1ef9 thu\u1eadt \u0111\u1ec3 l\u1ef1a ch\u1ecdn<\/h2>\n<h3>Ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng v\u00e0 s\u00f3ng h\u00e0i<\/h3>\n<p>VFD t\u1ea1o ra c\u00e1c d\u00f2ng \u0111i\u1ec7n h\u00e0i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng v\u00e0 g\u00e2y nhi\u1ec5u cho c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m. Vi\u1ec7c chuy\u1ec3n m\u1ea1ch IGBT trong ph\u1ea7n bi\u1ebfn t\u1ea7n t\u1ea1o ra s\u1ef1 bi\u1ebfn d\u1ea1ng h\u00e0i c\u00f3 th\u1ec3 y\u00eau c\u1ea7u cu\u1ed9n kh\u00e1ng \u0111\u01b0\u1eddng d\u00e2y \u0111\u1ea7u v\u00e0o ho\u1eb7c b\u1ed9 l\u1ecdc s\u00f3ng h\u00e0i \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n IEEE 519 v\u00e0 IEC 61000. Ng\u01b0\u1ee3c l\u1ea1i, b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m t\u1ea1o ra s\u00f3ng h\u00e0i t\u1ed1i thi\u1ec3u v\u00ec ch\u00fang ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 ki\u1ec3m so\u00e1t \u0111i\u1ec7n \u00e1p m\u00e0 kh\u00f4ng c\u1ea7n chuy\u1ec3n \u0111\u1ed5i t\u1ea7n s\u1ed1.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c c\u01a1 s\u1edf c\u00f3 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ea1y c\u1ea3m ho\u1eb7c y\u00eau c\u1ea7u nghi\u00eam ng\u1eb7t v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng, c\u00e2n nh\u1eafc v\u1ec1 s\u00f3ng h\u00e0i n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn quy\u1ebft \u0111\u1ecbnh. Tuy nhi\u00ean, VFD hi\u1ec7n \u0111\u1ea1i v\u1edbi \u0111\u1ea7u v\u00e0o ch\u1ee7 \u0111\u1ed9ng ho\u1eb7c thi\u1ebft k\u1ebf \u0111a xung c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u00e9o h\u00e0i t\u1ed5ng (THD) r\u1ea5t th\u1ea5p khi \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh \u0111\u00fang c\u00e1ch.<\/p>\n<h3>Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a \u0111\u1ed9ng c\u01a1<\/h3>\n<p>VFD y\u00eau c\u1ea7u l\u1ef1a ch\u1ecdn \u0111\u1ed9ng c\u01a1 c\u1ea9n th\u1eadn v\u00e0 c\u00f3 th\u1ec3 c\u1ea7n gi\u1ea3m \u0111\u1ecbnh m\u1ee9c cho m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh. \u0110\u1ea7u ra t\u1ea7n s\u1ed1 thay \u0111\u1ed5i c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng qu\u00e1 nhi\u1ec7t \u0111\u1ed9ng c\u01a1 v\u00e0 dv\/dt (th\u1eddi gian t\u0103ng \u0111i\u1ec7n \u00e1p) cao c\u00f3 th\u1ec3 g\u00e2y \u1ee9ng su\u1ea5t cho l\u1edbp c\u00e1ch \u0111i\u1ec7n c\u1ee7a \u0111\u1ed9ng c\u01a1. \u0110\u1ed9ng c\u01a1 ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n NEMA MG-1 Ph\u1ea7n 31 cho nhi\u1ec7m v\u1ee5 bi\u1ebfn t\u1ea7n, v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho c\u00e1c xung \u0111i\u1ec7n \u00e1p m\u00e0 VFD t\u1ea1o ra.<\/p>\n<p>B\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m, ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 \u0111\u01b0\u1eddng d\u00e2y, kh\u00f4ng \u00e1p \u0111\u1eb7t b\u1ea5t k\u1ef3 y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t n\u00e0o \u0111\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1 ngo\u00e0i c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt thi\u1ebft k\u1ebf ti\u00eau chu\u1ea9n. Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch n\u00e0y v\u1edbi c\u00e1c \u0111\u1ed9ng c\u01a1 hi\u1ec7n c\u00f3 l\u00e0m cho b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m tr\u1edf n\u00ean h\u1ea5p d\u1eabn \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng trang b\u1ecb th\u00eam n\u01a1i kh\u00f4ng th\u1ec3 thay th\u1ebf \u0111\u1ed9ng c\u01a1.<\/p>\n<h3>B\u1ea3o v\u1ec7 v\u00e0 an to\u00e0n<\/h3>\n<p>C\u1ea3 hai c\u00f4ng ngh\u1ec7 ph\u1ea3i t\u00edch h\u1ee3p v\u1edbi c\u00e1c <a href=\"https:\/\/test.viox.com\/vi\/thermal-overload-relay-vs-mpcb-difference\/\">s\u01a1 \u0111\u1ed3 b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1<\/a>. to\u00e0n di\u1ec7n. VFD th\u01b0\u1eddng bao g\u1ed3m b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i t\u00edch h\u1ee3p, nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 y\u00eau c\u1ea7u <a href=\"https:\/\/test.viox.com\/vi\/what-are-thermal-overload-relays\/\">r\u01a1 le qu\u00e1 t\u1ea3i nhi\u1ec7t<\/a> b\u00ean ngo\u00e0i cho m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh. B\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m th\u01b0\u1eddng y\u00eau c\u1ea7u c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i ri\u00eang bi\u1ec7t.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u an to\u00e0n ch\u1ee9c n\u0103ng, VFD c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p Safe Torque Off (STO) v\u00e0 c\u00e1c ch\u1ee9c n\u0103ng an to\u00e0n kh\u00e1c theo ti\u00eau chu\u1ea9n IEC 61800-5-2. Kh\u1ea3 n\u0103ng n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e1y m\u00f3c, n\u01a1i c\u1ea7n t\u1eaft nhanh m\u00e0 kh\u00f4ng c\u1ea7n phanh c\u01a1 h\u1ecdc \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho ng\u01b0\u1eddi v\u1eadn h\u00e0nh.<\/p>\n<h3>T\u00edch h\u1ee3p v\u1edbi H\u1ec7 th\u1ed1ng \u0110i\u1ec1u khi\u1ec3n<\/h3>\n<p>VFD hi\u1ec7n \u0111\u1ea1i cung c\u1ea5p c\u00e1c kh\u1ea3 n\u0103ng giao ti\u1ebfp m\u1edf r\u1ed9ng bao g\u1ed3m Modbus, Ethernet\/IP, PROFINET v\u00e0 c\u00e1c giao th\u1ee9c c\u00f4ng nghi\u1ec7p kh\u00e1c. Kh\u1ea3 n\u0103ng k\u1ebft n\u1ed1i n\u00e0y cho ph\u00e9p t\u00edch h\u1ee3p v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng h\u00f3a t\u00f2a nh\u00e0, SCADA v\u00e0 c\u00e1c s\u00e1ng ki\u1ebfn \u200b\u200bC\u00f4ng nghi\u1ec7p 4.0. Kh\u1ea3 n\u0103ng theo d\u00f5i m\u1ee9c ti\u00eau th\u1ee5 n\u0103ng l\u01b0\u1ee3ng, gi\u1edd ho\u1ea1t \u0111\u1ed9ng, l\u1ecbch s\u1eed l\u1ed7i v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 hi\u1ec7u su\u1ea5t l\u00e0m cho VFD tr\u1edf th\u00e0nh ngu\u1ed3n d\u1eef li\u1ec7u c\u00f3 gi\u00e1 tr\u1ecb cho c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh b\u1ea3o tr\u00ec d\u1ef1 \u0111o\u00e1n.<\/p>\n<p>B\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m th\u01b0\u1eddng cung c\u1ea5p c\u00e1c t\u00f9y ch\u1ecdn giao ti\u1ebfp h\u1ea1n ch\u1ebf h\u01a1n, m\u1eb7c d\u00f9 c\u00e1c thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i ng\u00e0y c\u00e0ng bao g\u1ed3m k\u1ebft n\u1ed1i m\u1ea1ng. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111i\u1ec1u khi\u1ec3n kh\u1edfi \u0111\u1ed9ng\/d\u1eebng c\u01a1 b\u1ea3n m\u00e0 kh\u00f4ng c\u1ea7n thu th\u1eadp d\u1eef li\u1ec7u m\u1edf r\u1ed9ng, giao di\u1ec7n \u0111\u01a1n gi\u1ea3n h\u01a1n c\u1ee7a b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m c\u00f3 th\u1ec3 c\u00f3 l\u1ee3i th\u1ebf.<\/p>\n<h2>Khung quy\u1ebft \u0111\u1ecbnh: Ch\u1ecdn c\u00f4ng ngh\u1ec7 ph\u00f9 h\u1ee3p<\/h2>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p ba c\u00e2u h\u1ecfi<\/h3>\n<p><strong>C\u00e2u h\u1ecfi 1: \u1ee8ng d\u1ee5ng c\u00f3 y\u00eau c\u1ea7u v\u1eadn h\u00e0nh t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i kh\u00f4ng?<\/strong><br \/>\nN\u1ebfu c\u00f3, th\u00ec b\u1eaft bu\u1ed9c ph\u1ea3i c\u00f3 VFD. N\u1ebfu kh\u00f4ng, h\u00e3y chuy\u1ec3n sang c\u00e2u h\u1ecfi 2.<\/p>\n<p><strong>C\u00e2u h\u1ecfi 2: H\u1ed3 s\u01a1 t\u1ea3i l\u00e0 g\u00ec?<\/strong><\/p>\n<ul>\n<li>M\u00f4-men xo\u1eafn thay \u0111\u1ed5i (qu\u1ea1t, m\u00e1y b\u01a1m): VFD c\u00f3 kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c ch\u1ee9ng minh b\u1eb1ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng<\/li>\n<li>M\u00f4-men xo\u1eafn kh\u00f4ng \u0111\u1ed5i (b\u0103ng t\u1ea3i, m\u00e1y n\u00e9n): B\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m th\u01b0\u1eddng kinh t\u1ebf h\u01a1n<\/li>\n<li>T\u1ea3i qu\u00e1n t\u00ednh cao: Xem x\u00e9t c\u00e1c y\u00eau c\u1ea7u kh\u1edfi \u0111\u1ed9ng v\u00e0 th\u1eddi gian t\u0103ng t\u1ed1c<\/li>\n<\/ul>\n<p><strong>C\u00e2u h\u1ecfi 3: T\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi l\u00e0 bao nhi\u00eau?<\/strong><br \/>\nT\u00ednh to\u00e1n:<\/p>\n<ul>\n<li>Chi ph\u00ed thi\u1ebft b\u1ecb ban \u0111\u1ea7u (VFD th\u01b0\u1eddng g\u1ea5p 2-3 l\u1ea7n chi ph\u00ed b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m)<\/li>\n<li>Chi ph\u00ed l\u1eafp \u0111\u1eb7t (VFD y\u00eau c\u1ea7u l\u1eafp \u0111\u1eb7t ph\u1ee9c t\u1ea1p h\u01a1n)<\/li>\n<li>Chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng trong su\u1ed1t tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn \u200b\u200bc\u1ee7a thi\u1ebft b\u1ecb (th\u01b0\u1eddng l\u00e0 15-20 n\u0103m)<\/li>\n<li>Chi ph\u00ed b\u1ea3o tr\u00ec (VFD y\u00eau c\u1ea7u b\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3 h\u01a1n)<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi m\u00e1y b\u01a1m 50 HP ho\u1ea1t \u0111\u1ed9ng 4.000 gi\u1edd m\u1ed7i n\u0103m v\u1edbi t\u1ea3i trung b\u00ecnh 40%, VFD c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m 4.000-6.000 \u0111\u00f4 la m\u1ed7i n\u0103m chi ph\u00ed n\u0103ng l\u01b0\u1ee3ng. V\u1edbi m\u1ee9c gi\u00e1 cao h\u01a1n 2.000-3.000 \u0111\u00f4 la so v\u1edbi b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m, th\u1eddi gian ho\u00e0n v\u1ed1n x\u1ea3y ra trong 6-12 th\u00e1ng, khi\u1ebfn VFD tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn r\u00f5 r\u00e0ng m\u1eb7c d\u00f9 chi ph\u00ed ban \u0111\u1ea7u cao h\u01a1n.<\/p>\n<h3>C\u00e1c khuy\u1ebfn ngh\u1ecb c\u1ee5 th\u1ec3 theo ng\u00e0nh<\/h3>\n<p><strong>C\u00e1c \u1ee9ng d\u1ee5ng HVAC<\/strong>: VFD l\u00e0 ti\u00eau chu\u1ea9n cho b\u1ea5t k\u1ef3 qu\u1ea1t ho\u1eb7c m\u00e1y b\u01a1m n\u00e0o tr\u00ean 10 HP do ti\u1ec1m n\u0103ng ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng \u0111\u00e1ng k\u1ec3 v\u00e0 b\u1ea3n ch\u1ea5t thay \u0111\u1ed5i v\u1ed1n c\u00f3 c\u1ee7a t\u1ea3i s\u01b0\u1edfi \u1ea5m v\u00e0 l\u00e0m m\u00e1t.<\/p>\n<p><strong>N\u01b0\u1edbc v\u00e0 n\u01b0\u1edbc th\u1ea3i<\/strong>: VFD cho c\u00e1c \u1ee9ng d\u1ee5ng l\u01b0u l\u01b0\u1ee3ng thay \u0111\u1ed5i; b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m cho c\u00e1c tr\u1ea1m n\u00e2ng t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i v\u00e0 c\u00e1c quy tr\u00ecnh l\u01b0u l\u01b0\u1ee3ng c\u1ed1 \u0111\u1ecbnh.<\/p>\n<p><strong>Ch\u1ebf t\u1ea1o<\/strong>: VFD cho \u0111i\u1ec1u khi\u1ec3n quy tr\u00ecnh v\u00e0 m\u00e1y m\u00f3c t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i; b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m cho b\u0103ng t\u1ea3i t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh v\u00e0 thi\u1ebft b\u1ecb ph\u1ee5 tr\u1ee3.<\/p>\n<p><strong>Khai th\u00e1c v\u00e0 t\u1ed5ng h\u1ee3p<\/strong>: B\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m cho m\u00e1y nghi\u1ec1n v\u00e0 b\u0103ng t\u1ea3i t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh; VFD cho b\u0103ng t\u1ea3i t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i v\u00e0 h\u1ec7 th\u1ed1ng x\u1eed l\u00fd v\u1eadt li\u1ec7u y\u00eau c\u1ea7u \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n<h2>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 c\u00e0i \u0111\u1eb7t v\u00e0 t\u00edch h\u1ee3p<\/h2>\n<h3>C\u00e1c c\u00e2n nh\u1eafc v\u1ec1 thi\u1ebft k\u1ebf \u0111i\u1ec7n<\/h3>\n<p>Th\u00edch h\u1ee3p <a href=\"https:\/\/test.viox.com\/vi\/homeowners-guide-to-circuit-breaker-sizing-and-load-calculation\/\">\u0111\u1ecbnh c\u1ee1 b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u1ea3 VFD v\u00e0 b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m. VFD y\u00eau c\u1ea7u xem x\u00e9t \u0111\u1eb7c bi\u1ec7t v\u1ec1 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ea7u v\u00e0o v\u00ec \u0111\u1ea7u v\u00e0o \u0111i\u1ec7n dung c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1eaft kh\u00f4ng mong mu\u1ed1n v\u1edbi <a href=\"https:\/\/test.viox.com\/vi\/what-is-a-molded-case-circuit-breaker-mccb\/\">c\u1ea7u dao v\u1ecf \u0111\u00fac<\/a>. ti\u00eau chu\u1ea9n. Nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t khuy\u00ean d\u00f9ng c\u00e0i \u0111\u1eb7t c\u1eaft t\u1ee9c th\u1eddi t\u1eeb 10-12 l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u1ea7u v\u00e0o VFD.<\/p>\n<p>B\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u1edbi contactor bypass y\u00eau c\u1ea7u s\u1ef1 ph\u1ed1i h\u1ee3p gi\u1eefa b\u1ea3o v\u1ec7 b\u00ean trong c\u1ee7a b\u1ed9 kh\u1edfi \u0111\u1ed9ng v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/circuit-protection-selection-framework-a-5-step-guide-for-panel-builders-iec-60947\/\">b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1<\/a>. b\u00ean ngo\u00e0i. Contactor bypass ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7y t\u1ea3i v\u00e0 d\u00f2ng \u0111i\u1ec7n kh\u00f3a r\u00f4to c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/p>\n<h3>N\u1ed1i \u0111\u1ea5t v\u00e0 EMC<\/h3>\n<p>VFD t\u1ea1o ra ti\u1ebfng \u1ed3n t\u1ea7n s\u1ed1 cao, \u0111\u00f2i h\u1ecfi c\u00e1c bi\u1ec7n ph\u00e1p n\u1ed1i \u0111\u1ea5t v\u00e0 che ch\u1eafn c\u1ea9n th\u1eadn. S\u1eed d\u1ee5ng c\u00e1p \u0111\u01b0\u1ee3c che ch\u1eafn \u0111\u1ecbnh m\u1ee9c VFD cho c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ed9ng c\u01a1, duy tr\u00ec k\u1ebft th\u00fac che ch\u1eafn 360 \u0111\u1ed9 \u1edf c\u1ea3 hai \u0111\u1ea7u v\u00e0 \u0111\u1ecbnh tuy\u1ebfn c\u00e1p \u0111\u1ed9ng c\u01a1 ri\u00eang bi\u1ec7t v\u1edbi d\u00e2y \u0111i\u1ec1u khi\u1ec3n. N\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch theo ti\u00eau chu\u1ea9n IEC 61800-3 EMC l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 can thi\u1ec7p v\u00e0o c\u00e1c thi\u1ebft b\u1ecb l\u00e2n c\u1eadn.<\/p>\n<h3>Thi\u1ebft k\u1ebf t\u1ee7 \u0111i\u1ec7n<\/h3>\n<p>Bi\u1ebfn t\u1ea7n (VFD) t\u1ea1o ra l\u01b0\u1ee3ng nhi\u1ec7t l\u1edbn h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u00e0 y\u00eau c\u1ea7u th\u00f4ng gi\u00f3 ho\u1eb7c l\u00e0m m\u00e1t \u0111\u1ea7y \u0111\u1ee7. T\u00ednh to\u00e1n l\u01b0\u1ee3ng nhi\u1ec7t ti\u00eau t\u00e1n d\u1ef1a tr\u00ean hi\u1ec7u su\u1ea5t c\u1ee7a VFD (th\u01b0\u1eddng l\u00e0 95-98%) v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00f4ng su\u1ea5t l\u00e0m m\u00e1t c\u1ee7a t\u1ee7 \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 l\u01b0\u1ee3ng nhi\u1ec7t sinh ra \u00edt nh\u1ea5t 20%. Nhi\u1ec1u k\u1ef9 s\u01b0 \u0111\u00e1nh gi\u00e1 th\u1ea5p y\u00eau c\u1ea7u l\u00e0m m\u00e1t c\u1ee7a VFD, d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c s\u1edbm v\u00e0 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c.<\/p>\n<p>Kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u1edbi contactor bypass t\u1ea1o ra l\u01b0\u1ee3ng nhi\u1ec7t t\u1ed1i thi\u1ec3u trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng, \u0111\u01a1n gi\u1ea3n h\u00f3a thi\u1ebft k\u1ebf nhi\u1ec7t c\u1ee7a t\u1ee7 \u0111i\u1ec7n. Tuy nhi\u00ean, h\u00e3y \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 kh\u00f4ng gian cho contactor bypass v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec1u khi\u1ec3n li\u00ean quan.<\/p>\n<h2>Sai L\u1ea7m ph\u1ed5 bi\u1ebfn \u0111\u1ec3 Tr\u00e1nh<\/h2>\n<ul>\n<li><strong>S\u1eed d\u1ee5ng VFD khi kh\u00f4ng c\u1ea7n \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9<\/strong>: \u0110i\u1ec1u n\u00e0y l\u00e3ng ph\u00ed v\u1ed1n v\u00e0o c\u00e1c ch\u1ee9c n\u0103ng kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 g\u00e2y ra s\u1ef1 ph\u1ee9c t\u1ea1p m\u00e0 kh\u00f4ng mang l\u1ea1i l\u1ee3i \u00edch. M\u1ed9t m\u00e1y n\u00e9n kh\u00ed 75 HP ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ed1c \u0111\u1ed9 kh\u00f4ng \u0111\u1ed5i kh\u00f4ng c\u1ea7n VFD 5.000 \u0111\u00f4 la khi m\u1ed9t kh\u1edfi \u0111\u1ed9ng m\u1ec1m 1.500 \u0111\u00f4 la cung c\u1ea5p \u0111\u1ee7 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7.<\/li>\n<li><strong>Ch\u1ecdn kh\u1edfi \u0111\u1ed9ng m\u1ec1m cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i thay \u0111\u1ed5i<\/strong>: B\u1ecf l\u1ee1 c\u00e1c c\u01a1 h\u1ed9i ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng. M\u1ed9t qu\u1ea1t th\u00e1p gi\u1ea3i nhi\u1ec7t 200 HP v\u1edbi kh\u1edfi \u0111\u1ed9ng m\u1ec1m c\u00f3 th\u1ec3 ti\u00eau th\u1ee5 30.000 \u0111\u00f4 la h\u00e0ng n\u0103m cho n\u0103ng l\u01b0\u1ee3ng d\u01b0 th\u1eeba so v\u1edbi h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng VFD \u2014 VFD t\u1ef1 ho\u00e0n v\u1ed1n trong v\u00e0i th\u00e1ng.<\/li>\n<li><strong>B\u1ecf qua t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi<\/strong>: Ch\u1ec9 t\u1eadp trung v\u00e0o gi\u00e1 ban \u0111\u1ea7u m\u00e0 kh\u00f4ng xem x\u00e9t 15-20 n\u0103m chi ph\u00ed v\u1eadn h\u00e0nh. Ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng th\u01b0\u1eddng l\u00e0m lu m\u1edd s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 chi ph\u00ed ban \u0111\u1ea7u.<\/li>\n<li><strong>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00e1p \u0111\u1ed9ng c\u01a1 kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7<\/strong>: S\u1eed d\u1ee5ng c\u00e1p ti\u00eau chu\u1ea9n cho c\u00e1c \u1ee9ng d\u1ee5ng VFD d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 EMC v\u00e0 kh\u1ea3 n\u0103ng h\u1ecfng c\u00e1ch \u0111i\u1ec7n \u0111\u1ed9ng c\u01a1. Lu\u00f4n ch\u1ec9 \u0111\u1ecbnh c\u00e1p \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho VFD v\u1edbi l\u1edbp ch\u1eafn th\u00edch h\u1ee3p.<\/li>\n<li><strong>B\u1ecf qua ph\u00e2n t\u00edch s\u00f3ng h\u00e0i<\/strong>: L\u1eafp \u0111\u1eb7t VFD m\u00e0 kh\u00f4ng xem x\u00e9t t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng \u0111i\u1ec7n c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m v\u00e0 vi ph\u1ea1m c\u00e1c th\u1ecfa thu\u1eadn k\u1ebft n\u1ed1i v\u1edbi l\u01b0\u1edbi \u0111i\u1ec7n.<\/li>\n<\/ul>\n<h2>Xu h\u01b0\u1edbng T\u01b0\u01a1ng lai v\u00e0 C\u00f4ng ngh\u1ec7 M\u1edbi N\u1ed5i<\/h2>\n<p>Ranh gi\u1edbi gi\u1eefa VFD v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m ti\u1ebfp t\u1ee5c m\u1edd \u0111i khi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t gi\u1edbi thi\u1ec7u \u201ckh\u1edfi \u0111\u1ed9ng m\u1ec1m th\u00f4ng minh\u201d v\u1edbi kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 h\u1ea1n ch\u1ebf v\u00e0 \u201cVFD nh\u1ecf g\u1ecdn\u201d g\u1ea7n v\u1edbi gi\u00e1 c\u1ee7a kh\u1edfi \u0111\u1ed9ng m\u1ec1m. Tuy nhi\u00ean, v\u1eadt l\u00fd c\u01a1 b\u1ea3n v\u1eabn gi\u1eef nguy\u00ean: \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 bi\u1ebfn thi\u00ean th\u1ef1c s\u1ef1 \u0111\u00f2i h\u1ecfi chuy\u1ec3n \u0111\u1ed5i t\u1ea7n s\u1ed1, \u0111i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi ki\u1ebfn tr\u00fac ch\u1ec9nh l\u01b0u-ngh\u1ecbch l\u01b0u c\u1ee7a VFD.<\/p>\n<p>C\u00e1c xu h\u01b0\u1edbng m\u1edbi n\u1ed5i bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Ch\u1ea5t b\u00e1n d\u1eabn silicon carbide (SiC)<\/strong> cho ph\u00e9p VFD nh\u1ecf g\u1ecdn h\u01a1n, hi\u1ec7u qu\u1ea3 h\u01a1n v\u1edbi y\u00eau c\u1ea7u l\u00e0m m\u00e1t gi\u1ea3m v\u00e0 t\u1ea7n s\u1ed1 chuy\u1ec3n m\u1ea1ch cao h\u01a1n \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 t\u1ed1t h\u01a1n.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng-\u0111\u1ed9ng c\u01a1 t\u00edch h\u1ee3p<\/strong> n\u01a1i VFD \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o v\u1ecf \u0111\u1ed9ng c\u01a1, lo\u1ea1i b\u1ecf c\u00e1p \u0111\u1ed9ng c\u01a1 v\u00e0 c\u00e1c th\u00e1ch th\u1ee9c EMC li\u00ean quan.<\/li>\n<li><strong>\u1ed4 \u0111\u0129a k\u1ebft n\u1ed1i \u0111\u00e1m m\u00e2y<\/strong> cung c\u1ea5p gi\u00e1m s\u00e1t t\u1eeb xa, b\u1ea3o tr\u00ec d\u1ef1 \u0111o\u00e1n v\u00e0 t\u1ed1i \u01b0u h\u00f3a n\u0103ng l\u01b0\u1ee3ng th\u00f4ng qua c\u00e1c thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y.<\/li>\n<li><strong>T\u00edch h\u1ee3p an to\u00e0n ch\u1ee9c n\u0103ng<\/strong> v\u1edbi VFD ng\u00e0y c\u00e0ng k\u1ebft h\u1ee3p c\u00e1c ch\u1ee9c n\u0103ng an to\u00e0n gi\u00fap lo\u1ea1i b\u1ecf c\u00e1c r\u01a1le v\u00e0 contactor an to\u00e0n ri\u00eang bi\u1ec7t.<\/li>\n<\/ul>\n<p>B\u1ea5t ch\u1ea5p nh\u1eefng ti\u1ebfn b\u1ed9 n\u00e0y, c\u00e1c ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn c\u01a1 b\u1ea3n v\u1eabn kh\u00f4ng thay \u0111\u1ed5i: ch\u1ecdn kh\u1edfi \u0111\u1ed9ng m\u1ec1m cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ed1c \u0111\u1ed9 c\u1ed1 \u0111\u1ecbnh y\u00eau c\u1ea7u kh\u1edfi \u0111\u1ed9ng nh\u1eb9 nh\u00e0ng v\u00e0 VFD cho c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 bi\u1ebfn thi\u00ean cho ph\u00e9p ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng ho\u1eb7c c\u1ea3i thi\u1ec7n quy tr\u00ecnh.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: L\u1ef1a ch\u1ecdn VFD so v\u1edbi Kh\u1edfi \u0111\u1ed9ng m\u1ec1m<\/h2>\n<p><strong>H\u1ecfi: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng VFD nh\u01b0 m\u1ed9t kh\u1edfi \u0111\u1ed9ng m\u1ec1m kh\u00f4ng?<\/strong><br \/>\n\u0110\u00e1p: C\u00f3, VFD bao g\u1ed3m ch\u1ee9c n\u0103ng kh\u1edfi \u0111\u1ed9ng m\u1ec1m v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh \u0111\u1ec3 t\u0103ng v\u00e0 gi\u1ea3m t\u1ed1c \u0111\u1ed9 \u0111\u1ed9ng c\u01a1 gi\u1ed1ng nh\u01b0 c\u00e1c kh\u1edfi \u0111\u1ed9ng m\u1ec1m chuy\u00ean d\u1ee5ng. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng VFD ch\u1ec9 \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng m\u1ec1m s\u1ebd l\u00e3ng ph\u00ed v\u1ed1n v\u00e0o c\u00e1c kh\u1ea3 n\u0103ng \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 kh\u00f4ng s\u1eed d\u1ee5ng. Ngo\u1ea1i l\u1ec7 l\u00e0 khi d\u1ef1 ki\u1ebfn c\u00e1c y\u00eau c\u1ea7u \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 trong t\u01b0\u01a1ng lai \u2014 vi\u1ec7c l\u1eafp \u0111\u1eb7t VFD ban \u0111\u1ea7u c\u00f3 th\u1ec3 kinh t\u1ebf h\u01a1n so v\u1edbi vi\u1ec7c trang b\u1ecb th\u00eam sau n\u00e0y.<\/p>\n<p><strong>H\u1ecfi: T\u00f4i c\u00f3 c\u1ea7n kh\u1edfi \u0111\u1ed9ng m\u1ec1m n\u1ebfu t\u00f4i \u0111\u00e3 c\u00f3 VFD kh\u00f4ng?<\/strong><br \/>\n\u0110\u00e1p: Kh\u00f4ng, VFD cung c\u1ea5p t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec1u khi\u1ec3n kh\u1edfi \u0111\u1ed9ng m\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m cung c\u1ea5p, c\u1ed9ng v\u1edbi \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 li\u00ean t\u1ee5c. S\u1eed d\u1ee5ng c\u1ea3 hai n\u1ed1i ti\u1ebfp l\u00e0 d\u01b0 th\u1eeba v\u00e0 l\u00e0m t\u0103ng th\u00eam s\u1ef1 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft. Ngo\u1ea1i l\u1ec7 duy nh\u1ea5t l\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng chuy\u00ean bi\u1ec7t v\u1edbi nhi\u1ec1u \u0111\u1ed9ng c\u01a1, trong \u0111\u00f3 VFD \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 h\u1ec7 th\u1ed1ng t\u1ed5ng th\u1ec3 trong khi c\u00e1c kh\u1edfi \u0111\u1ed9ng m\u1ec1m ri\u00eang l\u1ebb b\u1ea3o v\u1ec7 c\u00e1c \u0111\u1ed9ng c\u01a1 c\u1ee5 th\u1ec3 trong c\u00e1c chu k\u1ef3 kh\u1edfi \u0111\u1ed9ng-d\u1eebng th\u01b0\u1eddng xuy\u00ean.<\/p>\n<p><strong>H\u1ecfi: Th\u1eddi gian ho\u00e0n v\u1ed1n \u0111i\u1ec3n h\u00ecnh cho VFD l\u00e0 bao nhi\u00eau?<\/strong><br \/>\n\u0110\u00e1p: \u0110\u1ed1i v\u1edbi t\u1ea3i m\u00f4-men xo\u1eafn thay \u0111\u1ed5i (qu\u1ea1t v\u00e0 m\u00e1y b\u01a1m) ho\u1ea1t \u0111\u1ed9ng v\u1edbi s\u1ef1 thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 \u0111\u00e1ng k\u1ec3, th\u1eddi gian ho\u00e0n v\u1ed1n th\u01b0\u1eddng x\u1ea3y ra trong 18-36 th\u00e1ng. C\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i t\u1ed1c \u0111\u1ed9 l\u1edbn h\u01a1n v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng d\u00e0i h\u01a1n \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u1eddi gian ho\u00e0n v\u1ed1n nhanh h\u01a1n. M\u1ed9t qu\u1ea1t 100 HP ho\u1ea1t \u0111\u1ed9ng 6.000 gi\u1edd m\u1ed7i n\u0103m \u1edf t\u1ed1c \u0111\u1ed9 trung b\u00ecnh 70% c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u1eddi gian ho\u00e0n v\u1ed1n trong 12-18 th\u00e1ng. T\u1ea3i m\u00f4-men xo\u1eafn kh\u00f4ng \u0111\u1ed5i hi\u1ebfm khi bi\u1ec7n minh cho VFD ch\u1ec9 d\u1ef1a tr\u00ean ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<p><strong>H\u1ecfi: C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ed9ng c\u01a1 hi\u1ec7n c\u00f3 v\u1edbi VFD kh\u00f4ng?<\/strong><br \/>\n\u0110\u00e1p: H\u1ea7u h\u1ebft c\u00e1c \u0111\u1ed9ng c\u01a1 hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u1edbi VFD, nh\u01b0ng c\u00e1c \u0111\u1ed9ng c\u01a1 c\u0169 h\u01a1n c\u00f3 th\u1ec3 c\u1ea7n \u0111\u00e1nh gi\u00e1. \u0110\u1ed9ng c\u01a1 ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n NEMA MG-1 Ph\u1ea7n 31 v\u1ec1 nhi\u1ec7m v\u1ee5 bi\u1ebfn t\u1ea7n v\u1edbi h\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng. \u0110\u1ed9ng c\u01a1 c\u00f3 c\u00e1ch \u0111i\u1ec7n ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng s\u1edbm do \u0111i\u1ec7n \u00e1p t\u0103ng \u0111\u1ed9t bi\u1ebfn t\u1eeb vi\u1ec7c chuy\u1ec3n m\u1ea1ch VFD. Tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ed9ng c\u01a1 \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3 v\u1ec1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 xem x\u00e9t gi\u1ea3m \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9ng c\u01a1 t\u1eeb 10-15% khi s\u1eed d\u1ee5ng v\u1edbi VFD n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c c\u1ee5 th\u1ec3 cho nhi\u1ec7m v\u1ee5 bi\u1ebfn t\u1ea7n.<\/p>\n<p><strong>H\u1ecfi: L\u00e0m c\u00e1ch n\u00e0o \u0111\u1ec3 \u0111\u1ecbnh c\u1ee1 b\u1ed9 ng\u1eaft m\u1ea1ch cho VFD?<\/strong><br \/>\n\u0110\u00e1p: B\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ea7u v\u00e0o VFD ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecbnh c\u1ee1 d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u v\u00e0o VFD (th\u01b0\u1eddng l\u00e0 1,2-1,5 \u00d7 FLA c\u1ee7a \u0111\u1ed9ng c\u01a1) v\u1edbi c\u00e0i \u0111\u1eb7t ng\u1eaft t\u1ee9c th\u1eddi l\u00e0 10-12 \u00d7 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c ng\u1eaft do nhi\u1ec5u trong qu\u00e1 tr\u00ecnh s\u1ea1c VFD. B\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ea7u ra th\u01b0\u1eddng \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i b\u00ean trong c\u1ee7a VFD. Tham kh\u1ea3o <a href=\"https:\/\/test.viox.com\/vi\/wire-gauge-vs-circuit-breaker-sizing-chart\/\">h\u01b0\u1edbng d\u1eabn \u0111\u1ecbnh c\u1ee1 b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> v\u00e0 ph\u1ed1i h\u1ee3p v\u1edbi c\u00e1c khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t VFD cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n<p><strong>H\u1ecfi: VFD v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m y\u00eau c\u1ea7u b\u1ea3o tr\u00ec g\u00ec?<\/strong><br \/>\n\u0110\u00e1p: Kh\u1edfi \u0111\u1ed9ng m\u1ec1m y\u00eau c\u1ea7u b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u \u2014 ch\u1ee7 y\u1ebfu l\u00e0 ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 c\u00e1c k\u1ebft n\u1ed1i v\u00e0 contactor bypass n\u1ebfu \u0111\u01b0\u1ee3c trang b\u1ecb. VFD y\u00eau c\u1ea7u ch\u00fa \u00fd nhi\u1ec1u h\u01a1n: ki\u1ec3m tra\/thay th\u1ebf qu\u1ea1t l\u00e0m m\u00e1t 3-5 n\u0103m m\u1ed9t l\u1ea7n, ki\u1ec3m tra\/thay th\u1ebf t\u1ee5 \u0111i\u1ec7n 5-10 n\u0103m m\u1ed9t l\u1ea7n v\u00e0 v\u1ec7 sinh th\u01b0\u1eddng xuy\u00ean t\u1ea3n nhi\u1ec7t v\u00e0 b\u1ed9 l\u1ecdc kh\u00f4ng kh\u00ed. B\u1ea3o tr\u00ec \u0111\u00fang c\u00e1ch k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd VFD l\u00ean 15-20 n\u0103m; VFD b\u1ecb b\u1ecf b\u00ea th\u01b0\u1eddng b\u1ecb h\u1ecfng s\u1edbm sau 5-8 n\u0103m.<\/p>\n<p><strong>H\u1ecfi: VFD v\u00e0 kh\u1edfi \u0111\u1ed9ng m\u1ec1m c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi kh\u00f4ng?<\/strong><br \/>\n\u0110\u00e1p: C\u1ea3 hai \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi v\u1edbi v\u1ecf b\u1ecdc th\u00edch h\u1ee3p. Ch\u1ec9 \u0111\u1ecbnh v\u1ecf b\u1ecdc NEMA 3R (ch\u1ed1ng m\u01b0a) ho\u1eb7c NEMA 4X (m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n) khi th\u00edch h\u1ee3p. VFD y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t ch\u00fa \u00fd \u0111\u1ebfn vi\u1ec7c l\u00e0m m\u00e1t trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cao v\u00e0 c\u00f3 th\u1ec3 y\u00eau c\u1ea7u gi\u1ea3m \u0111\u1ecbnh m\u1ee9c tr\u00ean 40\u00b0C (104\u00b0F). Kh\u1edfi \u0111\u1ed9ng m\u1ec1m ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t t\u1ed1t h\u01a1n, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c thi\u1ebft k\u1ebf c\u00f3 contactor bypass gi\u00fap lo\u1ea1i b\u1ecf sinh nhi\u1ec7t trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p><strong>H\u1ecfi: C\u00f2n v\u1ec1 hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t th\u00ec sao?<\/strong><br \/>\n\u0110\u00e1p: VFD th\u01b0\u1eddng c\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t 0,95-0,98 \u1edf \u0111\u1ea7u v\u00e0o do thi\u1ebft k\u1ebf ch\u1ec9nh l\u01b0u c\u1ee7a ch\u00fang, c\u00f3 kh\u1ea3 n\u0103ng c\u1ea3i thi\u1ec7n h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a c\u01a1 s\u1edf. Tuy nhi\u00ean, ch\u00fang kh\u00f4ng cung c\u1ea5p b\u00f9 c\u00f4ng su\u1ea5t ph\u1ea3n kh\u00e1ng cho c\u00e1c t\u1ea3i kh\u00e1c. Kh\u1edfi \u0111\u1ed9ng m\u1ec1m kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t \u2014 \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng \u1edf h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t t\u1ef1 nhi\u00ean c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi t\u1ea3i. \u0110\u1ed1i v\u1edbi c\u00e1c c\u01a1 s\u1edf c\u00f3 h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t k\u00e9m, <a href=\"https:\/\/test.viox.com\/vi\/apfc-full-form-in-electrical\/\">hi\u1ec7u ch\u1ec9nh h\u1ec7 s\u1ed1 c\u00f4ng su\u1ea5t<\/a> n\u00ean \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft ri\u00eang bi\u1ec7t v\u1edbi vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1.<\/p>\n<hr style=\"margin: 40px 0; border: none; border-top: 1px solid #ddd;\" \/>\n<h2>Gi\u1edbi thi\u1ec7u v\u1ec1 VIOX Electric<\/h2>\n<p>VIOX Electric l\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t B2B h\u00e0ng \u0111\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb \u0111i\u1ec7n, chuy\u00ean v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1, thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 m\u1ea1ch v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p. D\u00f2ng s\u1ea3n ph\u1ea9m to\u00e0n di\u1ec7n c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m <a href=\"https:\/\/test.viox.com\/vi\/what-is-a-contactor\/\">c\u00e1c ti\u1ebfp \u0111i\u1ec3m<\/a>, <a href=\"https:\/\/test.viox.com\/vi\/types-of-motor-starters-selection-guide\/\">kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1<\/a>, <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">b\u1ed9 ng\u1eaft m\u1ea1ch<\/a>, v\u00e0 ho\u00e0n ch\u1ec9nh <a href=\"https:\/\/test.viox.com\/vi\/understanding-ground-fault-protection\/\">h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kh\u1eaft khe c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 545.195px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 545.195px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2947.81px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2947.81px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4657.57px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 4657.57px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>The Critical Choice That Determines System Performance When a 500 HP industrial fan motor starts, it can draw 600% of its rated current\u2014enough to dim lights across an entire facility and stress mechanical components to their limits. This single moment of startup defines why motor control selection matters. Variable Frequency Drives (VFDs) and soft starters [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21584,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21583","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/comments?post=21583"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21583\/revisions"}],"predecessor-version":[{"id":21585,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/21583\/revisions\/21585"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/21584"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=21583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=21583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=21583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}