{"id":22458,"date":"2026-03-23T09:46:53","date_gmt":"2026-03-23T01:46:53","guid":{"rendered":"https:\/\/viox.com\/?p=22458"},"modified":"2026-03-23T09:49:27","modified_gmt":"2026-03-23T01:49:27","slug":"surge-suppressor-for-contactors","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/surge-suppressor-for-contactors\/","title":{"rendered":"C\u00e1ch Ch\u1ecdn Thi\u1ebft B\u1ecb Ch\u1ed1ng S\u00e9t Lan Truy\u1ec1n Ph\u00f9 H\u1ee3p cho Contactor"},"content":{"rendered":"<div class=\"product-intro\">\n<p>Contactor h\u1ea1 th\u1ebf l\u00e0 tr\u1ee5 c\u1ed9t c\u1ee7a vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1. Kh\u1ea3 n\u0103ng \u0111\u00f3ng c\u1eaft t\u1ea3i nhanh ch\u00f3ng v\u00e0 \u0111\u00e1ng tin c\u1eady c\u1ee7a ch\u00fang \u2014 v\u1edbi \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 b\u1ec1n \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 m\u1ed9t tri\u1ec7u l\u1ea7n ho\u1ea1t \u0111\u1ed9ng \u2014 khi\u1ebfn ch\u00fang tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 thi\u1ebfu trong t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p, h\u1ec7 th\u1ed1ng HVAC v\u00e0 ph\u00e2n ph\u1ed1i \u0111i\u1ec7n. Nh\u01b0ng m\u1ed7i s\u1ef1 ki\u1ec7n chuy\u1ec3n m\u1ea1ch \u0111\u1ec1u c\u00f3 m\u1ed9t chi ph\u00ed \u1ea9n: gai \u0111i\u1ec7n \u00e1p tho\u00e1ng qua \u0111\u01b0\u1ee3c t\u1ea1o ra khi <a href=\"https:\/\/test.viox.com\/vi\/what-is-a-contactor\/\">x\u00fac<\/a> cu\u1ed9n d\u00e2y m\u1ea5t \u0111i\u1ec7n.<\/p>\n<div id='gallery-1' class='gallery galleryid-22458 gallery-columns-3 gallery-size-full'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/test.viox.com\/vi\/?attachment_id=5526'><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor.webp\" class=\"attachment-full size-full\" alt=\"\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-3211-AC-Contactor-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/test.viox.com\/vi\/?attachment_id=5522'><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor.webp\" class=\"attachment-full size-full\" alt=\"VIOX CJX2-0911 AC Contactor\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-0911-AC-Contactor-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/test.viox.com\/vi\/?attachment_id=5521'><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor.webp\" class=\"attachment-full size-full\" alt=\"VIOX CJX2-4011 AC Contactor\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2024\/09\/VIOX-CJX2-4011-AC-Contactor-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<h2>T\u1ea1i sao cu\u1ed9n d\u00e2y Contactor t\u1ea1o ra c\u00e1c xung \u0111i\u1ec7n \u00e1p<\/h2>\n<p>Cu\u1ed9n d\u00e2y l\u00e0 \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n t\u1eeb c\u1ee7a m\u1ecdi contactor. Khi \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, n\u00f3 h\u00fat m\u1ed9t d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng cao \u0111\u1ec3 k\u00e9o ph\u1ea7n \u1ee9ng v\u00e0o. Khi m\u1ea5t \u0111i\u1ec7n, n\u00f3 t\u1ea1o ra m\u1ed9t xung \u0111i\u1ec7n \u00e1p tho\u00e1ng qua c\u00f3 kh\u1ea3 n\u0103ng g\u00e2y h\u1ea1i \u2014 v\u00e0 vi\u1ec7c hi\u1ec3u l\u00fd do l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 ch\u1ecdn chi\u1ebfn l\u01b0\u1ee3c tri\u1ec7t ti\u00eau ph\u00f9 h\u1ee3p.<\/p>\n<p>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 l\u00e0 <strong>t\u1ef1 c\u1ea3m<\/strong>. T\u1ea1i th\u1eddi \u0111i\u1ec3m m\u1ea5t \u0111i\u1ec7n, d\u00f2ng \u0111i\u1ec7n cu\u1ed9n d\u00e2y gi\u1ea3m nhanh ch\u00f3ng v\u1ec1 0. Theo \u0111\u1ecbnh lu\u1eadt Lenz, t\u1eeb tr\u01b0\u1eddng suy gi\u1ea3m t\u1ea1o ra m\u1ed9t s\u1ee9c \u0111i\u1ec7n \u0111\u1ed9ng ng\u01b0\u1ee3c (back-EMF) tr\u00ean c\u00e1c \u0111\u1ea7u c\u1ef1c c\u1ee7a cu\u1ed9n d\u00e2y \u0111\u1ec3 c\u1ed1 g\u1eafng duy tr\u00ec d\u00f2ng \u0111i\u1ec7n. V\u00ec t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n (di\/dt) c\u1ef1c k\u1ef3 cao trong qu\u00e1 tr\u00ecnh ng\u1eaft k\u1ebft n\u1ed1i nhanh, n\u00ean xung \u0111i\u1ec7n \u00e1p k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi h\u00e0ng tr\u0103m ho\u1eb7c th\u1eadm ch\u00ed h\u00e0ng ngh\u00ecn volt.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/AC-coil-de-energization--surge-voltage-waveform-yellow-trace.webp\" alt=\"AC coil de-energization surge voltage waveform showing high voltage spike on oscilloscope display\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">M\u1ea5t \u0111i\u1ec7n cu\u1ed9n d\u00e2y AC: d\u1ea1ng s\u00f3ng \u0111i\u1ec7n \u00e1p xung (v\u1ebft m\u00e0u v\u00e0ng)<\/figcaption><\/figure>\n<p>C\u00e1c xung tho\u00e1ng qua n\u00e0y g\u00e2y ra hai r\u1ee7i ro ri\u00eang bi\u1ec7t. \u0110\u1ea7u ti\u00ean, ch\u00fang g\u00e2y ra <strong>h\u01b0 h\u1ecfng linh ki\u1ec7n<\/strong> \u2014 s\u1ef1 x\u00f3i m\u00f2n gia t\u0103ng c\u1ee7a <a href=\"https:\/\/test.viox.com\/vi\/contactors-vs-relays-understanding-the-key-differences\/\">ti\u1ebfp \u0111i\u1ec3m r\u01a1le<\/a>, s\u1ef1 suy gi\u1ea3m c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch b\u00e1n d\u1eabn (transistor, SSR) v\u00e0 s\u1ef1 c\u1ed1 c\u00e1ch \u0111i\u1ec7n cu\u1ed9n d\u00e2y s\u1edbm. Th\u1ee9 hai, ch\u00fang t\u1ea1o ra <strong>nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI)<\/strong> k\u1ebft n\u1ed1i v\u00e0o h\u1ec7 th\u1ed1ng d\u00e2y t\u00edn hi\u1ec7u g\u1ea7n \u0111\u00f3 v\u00e0 ph\u00e1 v\u1ee1 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111i\u1ec1u khi\u1ec3n nh\u1ea1y c\u1ea3m nh\u01b0 PLC, b\u1ed9 vi \u0111i\u1ec1u khi\u1ec3n v\u00e0 bus giao ti\u1ebfp.<\/p>\n<p>\u0110\u1ec3 gi\u1ea3m thi\u1ec3u nh\u1eefng \u1ea3nh h\u01b0\u1edfng n\u00e0y, b\u1ed1n lo\u1ea1i b\u1ed9 tri\u1ec7t ti\u00eau xung th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean cu\u1ed9n d\u00e2y contactor. M\u1ed7i lo\u1ea1i cung c\u1ea5p m\u1ed9t s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i kh\u00e1c nhau gi\u1eefa hi\u1ec7u qu\u1ea3 tri\u1ec7t ti\u00eau, lo\u1ea1i cu\u1ed9n d\u00e2y \u00e1p d\u1ee5ng v\u00e0 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi gian nh\u1ea3 c\u1ee7a contactor.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/The-four-common-coil-surge-suppressor-types.webp\" alt=\"Four types of surge suppressors for contactors: RC snubber, varistor MOV, freewheeling diode, and TVS diode circuit symbols\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">B\u1ed1n lo\u1ea1i b\u1ed9 tri\u1ec7t ti\u00eau xung cu\u1ed9n d\u00e2y ph\u1ed5 bi\u1ebfn<\/figcaption><\/figure>\n<hr \/>\n<h2>1. M\u1ea1ch Snubber RC<\/h2>\n<p>Nh\u1eefng <a href=\"https:\/\/test.viox.com\/vi\/coil-suppression-techniques-diode-vs-zener-rc-snubber\/\">Snubber RC<\/a> \u2014 m\u1ed9t \u0111i\u1ec7n tr\u1edf v\u00e0 t\u1ee5 \u0111i\u1ec7n m\u1eafc n\u1ed1i ti\u1ebfp, \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i song song v\u1edbi cu\u1ed9n d\u00e2y \u2014 l\u00e0 m\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p tri\u1ec7t ti\u00eau \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t.<\/p>\n<p><strong>Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng.<\/strong> Khi cu\u1ed9n d\u00e2y m\u1ea5t \u0111i\u1ec7n, s\u1ee9c \u0111i\u1ec7n \u0111\u1ed9ng ng\u01b0\u1ee3c (back-EMF) g\u00e2y ra d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua m\u1ea1ng snubber. T\u1ee5 \u0111i\u1ec7n h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng tho\u00e1ng qua v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n tr\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef, c\u00f3 hi\u1ec7u qu\u1ea3 k\u1eb9p xung \u0111i\u1ec7n \u00e1p \u0111\u1ebfn m\u1ed9t m\u1ee9c c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c. N\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef sau \u0111\u00f3 \u0111\u01b0\u1ee3c ti\u00eau t\u00e1n d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t th\u00f4ng qua \u0111i\u1ec7n tr\u1edf song song. Quan tr\u1ecdng kh\u00f4ng k\u00e9m, \u0111i\u1ec7n tr\u1edf cung c\u1ea5p kh\u1ea3 n\u0103ng gi\u1ea3m x\u00f3c gi\u00fap ng\u0103n t\u1ee5 \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n c\u1ea3m cu\u1ed9n d\u00e2y h\u00ecnh th\u00e0nh dao \u0111\u1ed9ng LC kh\u00f4ng t\u1eaft d\u1ea7n, n\u1ebfu kh\u00f4ng s\u1ebd t\u1ea1o ra m\u1ed9t lo\u1ea1t c\u00e1c ti\u1ebfng chu\u00f4ng \u0111i\u1ec7n \u00e1p m\u1edbi.<\/p>\n<p><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong><\/p>\n<ul>\n<li><strong>C\u00e1c lo\u1ea1i cu\u1ed9n d\u00e2y \u00e1p d\u1ee5ng:<\/strong> AC v\u00e0 DC<\/li>\n<li><strong>M\u1ee9c k\u1eb9p \u0111i\u1ec7n \u00e1p:<\/strong> \u2264 3 \u00d7 Uc (\u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y \u0111\u1ecbnh m\u1ee9c)<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi gian nh\u1ea3:<\/strong> V\u1eeba ph\u1ea3i \u2014 th\u01b0\u1eddng l\u00e0 1,2\u00d7 \u0111\u1ebfn 2\u00d7 th\u1eddi gian nh\u1ea3 b\u00ecnh th\u01b0\u1eddng<\/li>\n<li><strong>H\u1ea1n ch\u1ebf:<\/strong> Kh\u00f4ng n\u00ean d\u00f9ng trong c\u00e1c m\u1ea1ch c\u00f3 h\u00e0m l\u01b0\u1ee3ng s\u00f3ng h\u00e0i cao, v\u00ec s\u00f3ng h\u00e0i c\u00f3 th\u1ec3 g\u00e2y ra nhi\u1ec7t qu\u00e1 m\u1ee9c trong t\u1ee5 \u0111i\u1ec7n<\/li>\n<\/ul>\n<p>Snubber RC l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p \u0111a n\u0103ng, ti\u1ebft ki\u1ec7m chi ph\u00ed. Nh\u01b0\u1ee3c \u0111i\u1ec3m ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 t\u1ef7 l\u1ec7 k\u1eb9p (3\u00d7 Uc) l\u00e0 cao nh\u1ea5t trong b\u1ed1n t\u00f9y ch\u1ecdn, c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t s\u1ed1 n\u0103ng l\u01b0\u1ee3ng xung d\u01b0 v\u1eabn \u0111\u1ebfn \u0111\u01b0\u1ee3c m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n.<\/p>\n<hr \/>\n<h2>2. Varistor (MOV)<\/h2>\n<p>M\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/mov-vs-gdt-vs-tvs-comparison\/\"><strong>Varistor oxit kim lo\u1ea1i (MOV)<\/strong><\/a> tri\u1ec7t ti\u00eau c\u00e1c qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch cu\u1ed9n d\u00e2y th\u00f4ng qua \u0111\u1eb7c t\u00ednh d\u00f2ng \u0111i\u1ec7n-\u0111i\u1ec7n \u00e1p phi tuy\u1ebfn t\u00ednh cao c\u1ee7a n\u00f3. N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb k\u1eb9p ph\u1ee5 thu\u1ed9c \u0111i\u1ec7n \u00e1p h\u01a1n l\u00e0 m\u1ed9t b\u1ed9 gi\u1ea3m x\u00f3c dao \u0111\u1ed9ng h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<p><strong>Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng.<\/strong> D\u01b0\u1edbi \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y b\u00ecnh th\u01b0\u1eddng, varistor th\u1ec3 hi\u1ec7n tr\u1edf kh\u00e1ng r\u1ea5t cao \u2014 h\u1edf m\u1ea1ch hi\u1ec7u qu\u1ea3 \u2014 v\u00e0 h\u00fat d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 kh\u00f4ng \u0111\u00e1ng k\u1ec3. Khi cu\u1ed9n d\u00e2y m\u1ea5t \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p tho\u00e1ng qua v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p k\u1eb9p c\u1ee7a varistor (th\u01b0\u1eddng l\u00e0 1,6\u00d7 \u0111\u1ebfn 2\u00d7 \u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y \u0111\u1ecbnh m\u1ee9c), c\u00e1c ranh gi\u1edbi h\u1ea1t oxit k\u1ebdm s\u1ebd tr\u01b0\u1ee3t v\u00e0o tr\u1ea1ng th\u00e1i d\u1eabn \u0111i\u1ec7n. Tr\u1edf kh\u00e1ng varistor gi\u1ea3m \u0111i nhi\u1ec1u b\u1eadc, ph\u00e2n lu\u1ed3ng d\u00f2ng \u0111i\u1ec7n xung v\u00e0 k\u1eb9p \u0111i\u1ec7n \u00e1p \u0111\u1ea7u cu\u1ed1i \u0111\u1ebfn m\u1ed9t m\u1ee9c an to\u00e0n. Khi qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch gi\u1ea3m b\u1edbt, varistor s\u1ebd tr\u1edf l\u1ea1i tr\u1ea1ng th\u00e1i tr\u1edf kh\u00e1ng cao.<\/p>\n<p><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong><\/p>\n<ul>\n<li><strong>C\u00e1c lo\u1ea1i cu\u1ed9n d\u00e2y \u00e1p d\u1ee5ng:<\/strong> AC v\u00e0 DC<\/li>\n<li><strong>M\u1ee9c k\u1eb9p \u0111i\u1ec7n \u00e1p:<\/strong> \u2264 2 \u00d7 Uc<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi gian nh\u1ea3:<\/strong> Nh\u1ecf \u2014 th\u01b0\u1eddng l\u00e0 1,1\u00d7 \u0111\u1ebfn 1,5\u00d7 th\u1eddi gian nh\u1ea3 b\u00ecnh th\u01b0\u1eddng<\/li>\n<li><strong>C\u00e2n nh\u1eafc:<\/strong> Varistor xu\u1ed1ng c\u1ea5p theo th\u1eddi gian v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n h\u1ea5p th\u1ee5 xung l\u1eb7p \u0111i l\u1eb7p l\u1ea1i; trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 chu k\u1ef3 cao, c\u00f3 th\u1ec3 c\u1ea7n ki\u1ec3m tra ho\u1eb7c thay th\u1ebf \u0111\u1ecbnh k\u1ef3<\/li>\n<\/ul>\n<p>Varistor cung c\u1ea5p kh\u1ea3 n\u0103ng k\u1eb9p t\u1ed1t h\u01a1n (2\u00d7 Uc so v\u1edbi 3\u00d7 Uc) v\u00e0 \u00edt t\u00e1c \u0111\u1ed9ng h\u01a1n \u0111\u1ebfn th\u1eddi gian nh\u1ea3 so v\u1edbi snubber RC, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t l\u1ef1a ch\u1ecdn m\u1ea1nh m\u1ebd \u0111\u1ec3 b\u1ea3o v\u1ec7 contactor \u0111a n\u0103ng trong c\u1ea3 m\u1ea1ch AC v\u00e0 DC.<\/p>\n<hr \/>\n<h2>3. Diode Freewheeling (Diode Flyback)<\/h2>\n<p>Nh\u1eefng <a href=\"https:\/\/test.viox.com\/vi\/freewheeling-diode-vs-surge-arrester-guide\/\"><strong>Diode freewheeling<\/strong><\/a> \u2014 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 diode flyback ho\u1eb7c diode tri\u1ec7t ti\u00eau \u2014 cung c\u1ea5p kh\u1ea3 n\u0103ng tri\u1ec7t ti\u00eau xung \u0111i\u1ec7n \u00e1p hi\u1ec7u qu\u1ea3 nh\u1ea5t so v\u1edbi b\u1ea5t k\u1ef3 ph\u01b0\u01a1ng ph\u00e1p th\u1ee5 \u0111\u1ed9ng n\u00e0o. N\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch cung c\u1ea5p cho n\u0103ng l\u01b0\u1ee3ng t\u1eeb t\u00ednh \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef c\u1ee7a cu\u1ed9n d\u00e2y m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n tr\u1edf kh\u00e1ng th\u1ea5p, lo\u1ea1i b\u1ecf \u0111i\u1ec7n \u00e1p tho\u00e1ng qua cao t\u1ea1i ngu\u1ed3n c\u1ee7a n\u00f3.<\/p>\n<p><strong>Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng.<\/strong> Diode \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i ph\u00e2n c\u1ef1c ng\u01b0\u1ee3c tr\u00ean c\u00e1c \u0111\u1ea7u c\u1ef1c c\u1ee7a cu\u1ed9n d\u00e2y DC. Trong ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, n\u00f3 \u0111\u01b0\u1ee3c ph\u00e2n c\u1ef1c ng\u01b0\u1ee3c v\u00e0 kh\u00f4ng mang d\u00f2ng \u0111i\u1ec7n. T\u1ea1i th\u1eddi \u0111i\u1ec3m m\u1ea5t \u0111i\u1ec7n, t\u1eeb tr\u01b0\u1eddng suy gi\u1ea3m \u0111\u1ea3o ng\u01b0\u1ee3c c\u1ef1c t\u00ednh tr\u00ean cu\u1ed9n d\u00e2y, ph\u00e2n c\u1ef1c thu\u1eadn cho diode. D\u00f2ng \u0111i\u1ec7n cu\u1ed9n d\u00e2y ti\u1ebfp t\u1ee5c l\u01b0u th\u00f4ng qua diode trong m\u1ed9t v\u00f2ng k\u00edn, gi\u1ea3m d\u1ea7n khi n\u0103ng l\u01b0\u1ee3ng ti\u00eau t\u00e1n trong \u0111i\u1ec7n tr\u1edf DC c\u1ee7a ch\u00ednh cu\u1ed9n d\u00e2y. V\u00ec \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n kh\u00f4ng bao gi\u1edd m\u1edf ra \u0111\u1ed9t ng\u1ed9t, n\u00ean kh\u00f4ng c\u00f3 s\u1ef1 ki\u1ec7n di\/dt cao x\u1ea3y ra v\u00e0 do \u0111\u00f3 kh\u00f4ng c\u00f3 xung \u0111i\u1ec7n \u00e1p \u0111\u00e1ng k\u1ec3 n\u00e0o \u0111\u01b0\u1ee3c t\u1ea1o ra.<\/p>\n<p><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong><\/p>\n<ul>\n<li><strong>C\u00e1c lo\u1ea1i cu\u1ed9n d\u00e2y \u00e1p d\u1ee5ng:<\/strong> Ch\u1ec9 DC (kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n m\u1ed9t chi\u1ec1u c\u1ee7a diode khi\u1ebfn n\u00f3 kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi cu\u1ed9n d\u00e2y AC)<\/li>\n<li><strong>M\u1ee9c k\u1eb9p \u0111i\u1ec7n \u00e1p:<\/strong> \u2248 0 V \u2014 back-EMF v\u1ec1 c\u01a1 b\u1ea3n b\u1ecb lo\u1ea1i b\u1ecf<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi gian nh\u1ea3:<\/strong> Nghi\u00eam tr\u1ecdng \u2014 th\u01b0\u1eddng l\u00e0 6\u00d7 \u0111\u1ebfn 10\u00d7 th\u1eddi gian nh\u1ea3 b\u00ecnh th\u01b0\u1eddng<\/li>\n<li><strong>H\u1ea1n ch\u1ebf quan tr\u1ecdng:<\/strong> Th\u1eddi gian nh\u1ea3 k\u00e9o d\u00e0i c\u00f3 ngh\u0129a l\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m ch\u00ednh c\u1ee7a contactor v\u1eabn \u0111\u00f3ng l\u00e2u h\u01a1n nhi\u1ec1u sau khi t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n b\u1ecb lo\u1ea1i b\u1ecf; \u0111i\u1ec1u n\u00e0y l\u00e0 kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u m\u1ea5t \u0111i\u1ec7n nhanh (v\u00ed d\u1ee5: m\u1ea1ch d\u1eebng kh\u1ea9n c\u1ea5p, contactor \u0111\u1ea3o chi\u1ec1u)<\/li>\n<\/ul>\n<p>C\u00e1c \u1ea3nh ch\u1ee5p dao \u0111\u1ed9ng k\u00fd b\u00ean d\u01b0\u1edbi minh h\u1ecda r\u00f5 r\u00e0ng s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i. H\u00ecnh 10 hi\u1ec3n th\u1ecb m\u1ed9t contactor DC kh\u00f4ng c\u00f3 diode freewheeling: v\u1ebft m\u00e0u xanh l\u00e1 c\u00e2y (\u0111i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y) th\u1ec3 hi\u1ec7n m\u1ed9t xung tho\u00e1ng qua l\u1edbn v\u00e0 th\u1eddi gian nh\u1ea3 l\u00e0 13,5 ms. H\u00ecnh 11 hi\u1ec3n th\u1ecb c\u00f9ng m\u1ed9t contactor c\u00f3 c\u00e0i \u0111\u1eb7t diode freewheeling: back-EMF \u0111\u01b0\u1ee3c k\u1eb9p \u1edf 0 V, nh\u01b0ng th\u1eddi gian nh\u1ea3 k\u00e9o d\u00e0i \u0111\u1ebfn 97,2 ms \u2014 d\u00e0i h\u01a1n kho\u1ea3ng 7 l\u1ea7n.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/DC-contactor-release-waveform-without-freewheeling-diode-green--coil-voltage-blue--main-contact-voltage-Release-time--135-ms.webp\" alt=\"DC contactor release waveform without freewheeling diode (green: coil voltage; blue: main contact voltage)\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">D\u1ea1ng s\u00f3ng nh\u1ea3 contactor DC kh\u00f4ng c\u00f3 diode freewheeling. Th\u1eddi gian nh\u1ea3: 13,5 ms.<\/figcaption><\/figure>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/DC-contactor-release-waveform-with-freewheeling-diode-green--coil-voltage-blue--main-contact-voltage-Release-time--972-ms.webp\" alt=\"DC contactor release waveform with freewheeling diode (green: coil voltage; blue: main contact voltage)\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">D\u1ea1ng s\u00f3ng nh\u1ea3 contactor DC c\u00f3 diode freewheeling. Th\u1eddi gian nh\u1ea3: 97,2 ms.<\/figcaption><\/figure>\n<p>Diode freewheeling l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t khi \u01b0u ti\u00ean tri\u1ec7t ti\u00eau xung t\u1ed1i \u0111a v\u00e0 th\u1eddi gian nh\u1ea3 k\u00e9o d\u00e0i l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u2014 v\u00ed d\u1ee5: trong c\u00e1c m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n DC kh\u00f4ng quan tr\u1ecdng v\u1ec1 an to\u00e0n, n\u01a1i \u0111\u1ed9 nh\u1ea1y EMI cao.<\/p>\n<hr \/>\n<h2>4. Diode TVS hai chi\u1ec1u<\/h2>\n<p>M\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/mov-vs-gdt-vs-tvs-comparison\/\"><strong>Diode tri\u1ec7t ti\u00eau \u0111i\u1ec7n \u00e1p tho\u00e1ng qua (TVS) hai chi\u1ec1u<\/strong><\/a> k\u1ebft h\u1ee3p kh\u1ea3 n\u0103ng k\u1eb9p \u0111i\u1ec7n \u00e1p ch\u00ednh x\u00e1c v\u1edbi t\u00e1c \u0111\u1ed9ng t\u1ed1i thi\u1ec3u \u0111\u1ebfn th\u1eddi gian nh\u1ea3, khi\u1ebfn n\u00f3 c\u00f3 th\u1ec3 l\u00e0 gi\u1ea3i ph\u00e1p tri\u1ec7t ti\u00eau c\u00e2n b\u1eb1ng nh\u1ea5t hi\u1ec7n c\u00f3.<\/p>\n<p><strong>Nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng.<\/strong> Diode TVS hai chi\u1ec1u \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u00ean c\u00e1c \u0111\u1ea7u c\u1ef1c c\u1ee7a cu\u1ed9n d\u00e2y. D\u01b0\u1edbi \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, n\u00f3 th\u1ec3 hi\u1ec7n tr\u1edf kh\u00e1ng cao v\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ea1ch. Khi cu\u1ed9n d\u00e2y m\u1ea5t \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p tho\u00e1ng qua \u2014 \u1edf c\u1ea3 hai c\u1ef1c t\u00ednh \u2014 v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p \u0111\u00e1nh th\u1ee7ng TVS, thi\u1ebft b\u1ecb s\u1ebd \u0111i v\u00e0o tr\u1ea1ng th\u00e1i \u0111\u00e1nh th\u1ee7ng th\u00e1c l\u0169 trong v\u00f2ng nano gi\u00e2y. N\u00f3 chuy\u1ec3n t\u1eeb tr\u1edf kh\u00e1ng cao sang tr\u1edf kh\u00e1ng th\u1ea5p, h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng xung v\u00e0 k\u1eb9p \u0111i\u1ec7n \u00e1p \u0111\u1ea7u cu\u1ed1i \u0111\u1ebfn m\u1ed9t m\u1ee9c an to\u00e0n, c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u00e1c \u0111\u1eb7c t\u00ednh ti\u1ebfp gi\u00e1p PN c\u1ee7a n\u00f3. Khi qu\u00e1 tr\u00ecnh chuy\u1ec3n m\u1ea1ch tr\u00f4i qua, TVS s\u1ebd tr\u1edf l\u1ea1i tr\u1ea1ng th\u00e1i ch\u1eb7n c\u1ee7a n\u00f3.<\/p>\n<p><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong><\/p>\n<ul>\n<li><strong>C\u00e1c lo\u1ea1i cu\u1ed9n d\u00e2y \u00e1p d\u1ee5ng:<\/strong> AC v\u00e0 DC<\/li>\n<li><strong>M\u1ee9c k\u1eb9p \u0111i\u1ec7n \u00e1p:<\/strong> \u2264 2 \u00d7 Uc<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn th\u1eddi gian nh\u1ea3:<\/strong> Kh\u00f4ng \u0111\u00e1ng k\u1ec3 \u2014 th\u1eddi gian nh\u1ea3 v\u1ec1 c\u01a1 b\u1ea3n kh\u00f4ng thay \u0111\u1ed5i<\/li>\n<li><strong>L\u1ee3i th\u1ebf:<\/strong> Th\u1eddi gian ph\u1ea3n h\u1ed3i nhanh (d\u01b0\u1edbi nano gi\u00e2y) v\u00e0 \u0111i\u1ec7n \u00e1p k\u1eb9p ch\u00ednh x\u00e1c l\u00e0m cho diode TVS \u0111\u1eb7c bi\u1ec7t hi\u1ec7u qu\u1ea3 trong vi\u1ec7c b\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u1ea1 ngu\u1ed3n nh\u1ea1y c\u1ea3m<\/li>\n<\/ul>\n<p><strong>C\u00e2n nh\u1eafc v\u1ec1 k\u00edch th\u01b0\u1edbc quan tr\u1ecdng:<\/strong> Kh\u00f4ng gi\u1ed1ng nh\u01b0 varistor v\u00e0 snubber RC, diode TVS c\u00f3 kh\u1ea3 n\u0103ng d\u00f2ng \u0111i\u1ec7n xung t\u01b0\u01a1ng \u0111\u1ed1i h\u1ea1n ch\u1ebf (I_{TSM}) v\u00e0 \u0111\u1ecbnh m\u1ee9c c\u00f4ng su\u1ea5t xung \u0111\u1ec9nh (P_{PP}). N\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong cu\u1ed9n d\u00e2y contactor t\u1ea1i th\u1eddi \u0111i\u1ec3m m\u1ea5t \u0111i\u1ec7n l\u00e0 E = \\frac{1}{2}LI^2, v\u00e0 \u0111\u1ed1i v\u1edbi c\u00e1c contactor l\u1edbn (th\u01b0\u1eddng &gt;100 A k\u00edch th\u01b0\u1edbc khung) c\u00f3 \u0111i\u1ec7n c\u1ea3m cu\u1ed9n d\u00e2y cao, n\u0103ng l\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng v\u01b0\u1ee3t qu\u00e1 \u0111\u1ecbnh m\u1ee9c h\u1ea5p th\u1ee5 xung \u0111\u01a1n c\u1ee7a thi\u1ebft b\u1ecb TVS ti\u00eau chu\u1ea9n \u2014 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c ti\u1ebfp gi\u00e1p th\u1ea3m kh\u1ed1c. Tr\u01b0\u1edbc khi ch\u1ec9 \u0111\u1ecbnh m\u1ed9t diode TVS, h\u00e3y lu\u00f4n t\u00ednh to\u00e1n n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 x\u00e1c minh r\u1eb1ng \u0111\u1ecbnh m\u1ee9c P_{PP} c\u1ee7a thi\u1ebft b\u1ecb \u0111\u00e3 ch\u1ecdn cung c\u1ea5p \u0111\u1ee7 bi\u00ean \u0111\u1ed9. M\u1ed9t quy t\u1eafc chung l\u00e0 ch\u1ecdn TVS c\u00f3 \u0111\u1ecbnh m\u1ee9c c\u00f4ng su\u1ea5t xung \u0111\u1ec9nh \u00edt nh\u1ea5t g\u1ea5p 2\u00d7 \u0111\u1ebfn 3\u00d7 n\u0103ng l\u01b0\u1ee3ng cu\u1ed9n d\u00e2y \u0111\u00e3 t\u00ednh to\u00e1n. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ebf \u0111\u1ed9 h\u1ecfng h\u00f3c t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng th\u01b0\u1eddng g\u1eb7p nh\u1ea5t: TVS d\u01b0\u1eddng nh\u01b0 ho\u1ea1t \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh ch\u1ea1y th\u1eed nh\u01b0ng h\u1ecfng h\u00f3c \u00e2m th\u1ea7m sau c\u00e1c chu k\u1ef3 chuy\u1ec3n m\u1ea1ch n\u0103ng l\u01b0\u1ee3ng cao l\u1eb7p \u0111i l\u1eb7p l\u1ea1i, khi\u1ebfn m\u1ea1ch kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7.<\/p>\n<p>Diode TVS hai chi\u1ec1u l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean khi c\u1ea3 kh\u1ea3 n\u0103ng k\u1eb9p hi\u1ec7u qu\u1ea3 v\u00e0 th\u1eddi gian nh\u1ea3 kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng \u0111\u1ec1u \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u2014 m\u1ed9t y\u00eau c\u1ea7u ph\u1ed5 bi\u1ebfn trong c\u00e1c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng hi\u1ec7n \u0111\u1ea1i v\u1edbi c\u00e1c r\u00e0ng bu\u1ed9c ch\u1eb7t ch\u1ebd v\u1ec1 an to\u00e0n v\u00e0 th\u1eddi gian.<\/p>\n<hr \/>\n<h2>H\u01b0\u1edbng d\u1eabn so s\u00e1nh v\u00e0 l\u1ef1a ch\u1ecdn<\/h2>\n<p>B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft b\u1ed1n lo\u1ea1i b\u1ed9 tri\u1ec7t ti\u00eau tr\u00ean c\u00e1c ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn ch\u00ednh.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Tham s\u1ed1<\/th>\n<th style=\"padding: 8px;\">RC Snubber<\/th>\n<th style=\"padding: 8px;\">Varistor (MOV)<\/th>\n<th style=\"padding: 8px;\">Diode Freewheeling<\/th>\n<th style=\"padding: 8px;\">Diode TVS hai chi\u1ec1u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>C\u01a1 ch\u1ebf tri\u1ec7t ti\u00eau<\/strong><\/td>\n<td style=\"padding: 8px;\">H\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n dung + ti\u00eau t\u00e1n \u0111i\u1ec7n tr\u1edf<\/td>\n<td style=\"padding: 8px;\">D\u1eabn \u0111i\u1ec7n bi\u00ean h\u1ea1t ZnO phi tuy\u1ebfn<\/td>\n<td style=\"padding: 8px;\">Tu\u1ea7n ho\u00e0n d\u00f2ng \u0111i\u1ec7n DC tr\u1edf kh\u00e1ng th\u1ea5p<\/td>\n<td style=\"padding: 8px;\">K\u1eb9p \u0111\u00e1nh th\u1ee7ng th\u00e1c PN junction<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>T\u01b0\u01a1ng th\u00edch cu\u1ed9n AC<\/strong><\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<td style=\"padding: 8px;\">\u274c Kh\u00f4ng<\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>T\u01b0\u01a1ng th\u00edch cu\u1ed9n DC<\/strong><\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<td style=\"padding: 8px;\">\u2705 C\u00f3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>M\u1ee9c k\u1eb9p \u0111i\u1ec7n \u00e1p<\/strong><\/td>\n<td style=\"padding: 8px;\">\u2264 3 \u00d7 Uc<\/td>\n<td style=\"padding: 8px;\">\u2264 2 \u00d7 Uc<\/td>\n<td style=\"padding: 8px;\">\u2248 0 V<\/td>\n<td style=\"padding: 8px;\">\u2264 2 \u00d7 Uc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u1ea2nh h\u01b0\u1edfng th\u1eddi gian nh\u1ea3<\/strong><\/td>\n<td style=\"padding: 8px;\">1.2\u00d7 \u2013 2\u00d7<\/td>\n<td style=\"padding: 8px;\">1.1\u00d7 \u2013 1.5\u00d7<\/td>\n<td style=\"padding: 8px;\">6\u00d7 \u2013 10\u00d7<\/td>\n<td style=\"padding: 8px;\">\u2248 1\u00d7 (kh\u00f4ng \u0111\u00e1ng k\u1ec3)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>T\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i<\/strong><\/td>\n<td style=\"padding: 8px;\">V\u1eeba ph\u1ea3i<\/td>\n<td style=\"padding: 8px;\">Nhanh<\/td>\n<td style=\"padding: 8px;\">Kh\u00f4ng \u00e1p d\u1ee5ng (\u0111\u01b0\u1eddng d\u1eabn li\u00ean t\u1ee5c)<\/td>\n<td style=\"padding: 8px;\">R\u1ea5t nhanh (&lt; 1 ns)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0110a n\u0103ng, nh\u1ea1y c\u1ea3m v\u1ec1 chi ph\u00ed<\/td>\n<td style=\"padding: 8px;\">AC\/DC \u0111a n\u0103ng<\/td>\n<td style=\"padding: 8px;\">M\u1ea1ch DC ch\u1ecbu \u0111\u01b0\u1ee3c nh\u1ea3 ch\u1eadm<\/td>\n<td style=\"padding: 8px;\">H\u1ec7 th\u1ed1ng hi\u1ec7u su\u1ea5t cao, quan tr\u1ecdng v\u1ec1 th\u1eddi gian<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u0110\u1ec1 xu\u1ea5t l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf<\/h3>\n<p><strong>\u0110\u1ed1i v\u1edbi contactor cu\u1ed9n AC<\/strong>, l\u1ef1a ch\u1ecdn thu h\u1eb9p th\u00e0nh ba t\u00f9y ch\u1ecdn v\u00ec diode freewheeling kh\u00f4ng \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c. N\u1ebfu th\u1eddi gian nh\u1ea3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u2014 nh\u01b0 trong kh\u00f3a li\u00ean \u0111\u1ed9ng an to\u00e0n ho\u1eb7c m\u00e1y m\u00f3c chu k\u1ef3 nhanh \u2014 th\u00ec <strong>diode TVS hai chi\u1ec1u<\/strong> l\u00e0 \u1ee9ng c\u1eed vi\u00ean m\u1ea1nh nh\u1ea5t. N\u1ebfu chi ph\u00ed l\u00e0 m\u1ed1i quan t\u00e2m h\u00e0ng \u0111\u1ea7u v\u00e0 m\u1ee9c k\u1eb9p v\u1eeba ph\u1ea3i l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, th\u00ec <strong>Snubber RC<\/strong> l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn kinh t\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh. <strong>varistor<\/strong> n\u1eb1m gi\u1eefa hai l\u1ef1a ch\u1ecdn, cung c\u1ea5p kh\u1ea3 n\u0103ng k\u1eb9p t\u1ed1t h\u01a1n so v\u1edbi RC snubber v\u1edbi m\u1ee9c ph\u1ea1t th\u1eddi gian nh\u1ea3 t\u1ed1i thi\u1ec3u.<\/p>\n<p><strong>\u0110\u1ed1i v\u1edbi contactor cu\u1ed9n DC<\/strong>, c\u1ea3 b\u1ed1n t\u00f9y ch\u1ecdn \u0111\u1ec1u c\u00f3 s\u1eb5n. <strong>Diode freewheeling<\/strong> mang l\u1ea1i kh\u1ea3 n\u0103ng tri\u1ec7t ti\u00eau v\u00f4 song (back-EMF 0 V) nh\u01b0ng ch\u1ec9 n\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ee9c t\u0103ng th\u1eddi gian nh\u1ea3 t\u1eeb 6\u00d7 \u0111\u1ebfn 10\u00d7 l\u00e0 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. Trong c\u00e1c \u1ee9ng d\u1ee5ng DC nh\u1ea1y c\u1ea3m v\u1ec1 th\u1eddi gian \u2014 \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng \u1ee9ng d\u1ee5ng cung c\u1ea5p \u0111\u1ea7u v\u00e0o PLC ho\u1eb7c giao ti\u1ebfp v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng fieldbus \u2014 th\u00ec <strong>diode TVS hai chi\u1ec1u<\/strong> cung c\u1ea5p s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed5ng th\u1ec3 t\u1ed1t nh\u1ea5t gi\u1eefa hi\u1ec7u su\u1ea5t tri\u1ec7t ti\u00eau v\u00e0 ph\u1ea3n h\u1ed3i \u0111\u1ed9ng.<\/p>\n<p>Trong th\u1ef1c t\u1ebf, nhi\u1ec1u k\u1ef9 s\u01b0 k\u1ebft h\u1ee3p c\u00e1c b\u1ed9 tri\u1ec7t ti\u00eau \u0111\u1ec3 ph\u00f2ng th\u1ee7 chuy\u00ean s\u00e2u. M\u1ed9t c\u1ea5u h\u00ecnh ph\u1ed5 bi\u1ebfn gh\u00e9p n\u1ed1i m\u1ed9t <strong>diode freewheeling v\u1edbi m\u1ed9t diode Zener n\u1ed1i ti\u1ebfp<\/strong> (ho\u1eb7c diode TVS) \u0111\u1ec3 gi\u1edbi h\u1ea1n back-EMF \u0111\u1ed3ng th\u1eddi h\u1ea1n ch\u1ebf m\u1ee9c t\u0103ng th\u1eddi gian nh\u1ea3 \u2014 nh\u01b0ng \u0111\u00f3 l\u00e0 m\u1ed9t ch\u1ee7 \u0111\u1ec1 cho m\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/coil-suppression-techniques-diode-vs-zener-rc-snubber\/\">th\u1ea3o lu\u1eadn s\u00e2u h\u01a1n v\u1ec1 c\u00e1c m\u1ea1ng tri\u1ec7t ti\u00eau n\u00e2ng cao<\/a>.<\/p>\n<p>\u0110\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n v\u1ec1 l\u1ef1a ch\u1ecdn v\u00e0 b\u1ea3o tr\u00ec contactor, h\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/test.viox.com\/vi\/industrial-contactor-maintenance-inspection-checklist\/\">b\u1ea3o tr\u00ec contactor c\u00f4ng nghi\u1ec7p<\/a> v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/contactor-troubleshooting-guide-buzzing-coil-failure\/\">kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 c\u00f4ng t\u1eafc t\u01a1<\/a>.<\/p>\n<hr \/>\n<h2>Nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<h3>T\u1ea1i sao cu\u1ed9n d\u00e2y contactor c\u1ee7a t\u00f4i t\u1ea1o ra c\u00e1c xung \u0111i\u1ec7n \u00e1p khi n\u00f3 t\u1eaft?<\/h3>\n<p>M\u1ed7i cu\u1ed9n d\u00e2y contactor l\u00e0 m\u1ed9t cu\u1ed9n c\u1ea3m. Khi m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n ng\u1eaft d\u00f2ng \u0111i\u1ec7n cu\u1ed9n d\u00e2y, t\u1eeb tr\u01b0\u1eddng s\u1ee5p \u0111\u1ed5 t\u1ea1o ra m\u1ed9t ph\u1ea3n \u0111i\u1ec7n \u0111\u1ed9ng (back-EMF) theo \u0111\u1ecbnh lu\u1eadt Lenz. V\u00ec d\u00f2ng \u0111i\u1ec7n gi\u1ea3m xu\u1ed1ng b\u1eb1ng kh\u00f4ng r\u1ea5t nhanh, n\u00ean $di\/dt$ k\u1ebft qu\u1ea3 c\u1ef1c k\u1ef3 cao, t\u1ea1o ra c\u00e1c gai \u0111i\u1ec7n \u00e1p tho\u00e1ng qua c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi h\u00e0ng tr\u0103m ho\u1eb7c h\u00e0ng ngh\u00ecn volt \u2014 v\u01b0\u1ee3t xa \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a cu\u1ed9n d\u00e2y.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RC snubber v\u00e0 varistor \u0111\u1ec3 b\u1ea3o v\u1ec7 contactor l\u00e0 g\u00ec?<\/h3>\n<p>M\u1ea1ch d\u1eadp h\u1ed3 quang RC h\u1ea5p th\u1ee5 n\u0103ng l\u01b0\u1ee3ng qu\u00e1 \u0111\u1ed9 trong t\u1ee5 \u0111i\u1ec7n v\u00e0 ti\u00eau t\u00e1n n\u00f3 qua \u0111i\u1ec7n tr\u1edf, k\u1eb9p xung \u0111i\u1ec7n \u00e1p xu\u1ed1ng x\u1ea5p x\u1ec9 3 l\u1ea7n \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a cu\u1ed9n d\u00e2y. Varistor (MOV) s\u1eed d\u1ee5ng \u0111i\u1ec7n tr\u1edf phi tuy\u1ebfn c\u1ee7a n\u00f3 \u0111\u1ec3 k\u1eb9p \u0111i\u1ec7n \u00e1p ch\u1eb7t h\u01a1n \u2014 th\u01b0\u1eddng l\u00e0 kho\u1ea3ng 2 l\u1ea7n \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a cu\u1ed9n d\u00e2y \u2014 v\u1edbi \u00edt \u1ea3nh h\u01b0\u1edfng h\u01a1n \u0111\u1ebfn th\u1eddi gian nh\u1ea3. Varistor cung c\u1ea5p hi\u1ec7u su\u1ea5t tri\u1ec7t ti\u00eau t\u1ed1t h\u01a1n, trong khi m\u1ea1ch d\u1eadp h\u1ed3 quang RC \u0111\u01a1n gi\u1ea3n h\u01a1n v\u00e0 \u00edt t\u1ed1n k\u00e9m h\u01a1n.<\/p>\n<h3>T\u1ea1i sao diode x\u1ea3 ng\u01b0\u1ee3c l\u1ea1i l\u00e0m t\u0103ng th\u1eddi gian nh\u1ea3 c\u1ee7a contactor?<\/h3>\n<p>Diode freewheeling (flyback) cung c\u1ea5p m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn tr\u1edf kh\u00e1ng g\u1ea7n b\u1eb1ng kh\u00f4ng \u0111\u1ec3 d\u00f2ng \u0111i\u1ec7n cu\u1ed9n d\u00e2y tu\u1ea7n ho\u00e0n sau khi m\u1ea5t \u0111i\u1ec7n. \u0110i\u1ec1u n\u00e0y lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n gai \u0111i\u1ec7n \u00e1p, nh\u01b0ng d\u00f2ng \u0111i\u1ec7n cu\u1ed9n d\u00e2y gi\u1ea3m r\u1ea5t ch\u1eadm qua diode v\u00e0 \u0111i\u1ec7n tr\u1edf DC c\u1ee7a cu\u1ed9n d\u00e2y thay v\u00ec gi\u1ea3m \u0111\u1ed9t ng\u1ed9t. Do \u0111\u00f3, l\u1ef1c t\u1eeb gi\u1eef ph\u1ea7n \u1ee9ng t\u1ed3n t\u1ea1i l\u00e2u h\u01a1n nhi\u1ec1u v\u00e0 th\u1eddi gian nh\u1ea3 c\u1ee7a contactor t\u0103ng t\u1eeb 6\u00d7 \u0111\u1ebfn 10\u00d7 \u2014 m\u1ed9t m\u1ed1i quan t\u00e2m quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u m\u1ea5t \u0111i\u1ec7n nhanh, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea1ch d\u1eebng kh\u1ea9n c\u1ea5p.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t b\u1ed9 tri\u1ec7t xung \u0111i\u1ec7n \u00e1p cho c\u1ea3 contactor AC v\u00e0 DC kh\u00f4ng?<\/h3>\n<p>\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i thi\u1ebft b\u1ecb tri\u1ec7t ti\u00eau. M\u1ea1ch d\u1eadp h\u1ed3 quang RC, varistor (MOV) v\u00e0 diode TVS hai chi\u1ec1u t\u01b0\u01a1ng th\u00edch v\u1edbi c\u1ea3 cu\u1ed9n d\u00e2y AC v\u00e0 DC. Tuy nhi\u00ean, diode freewheeling ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi cu\u1ed9n d\u00e2y DC v\u00ec ch\u00fang d\u1ef1a v\u00e0o d\u1eabn \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u2014 vi\u1ec7c k\u1ebft n\u1ed1i m\u1ed9t diode nh\u01b0 v\u1eady tr\u00ean m\u1ed9t cu\u1ed9n d\u00e2y AC s\u1ebd g\u00e2y ng\u1eafn m\u1ea1ch m\u1ed7i n\u1eeda chu k\u1ef3 \u00e2m, l\u00e0m h\u1ecfng diode v\u00e0 m\u1ea1ch \u0111i\u1ec7n.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i ch\u1ecdn gi\u1eefa diode TVS v\u00e0 varistor \u0111\u1ec3 tri\u1ec7t ti\u00eau xung \u0111i\u1ec7n cho contactor?<\/h3>\n<p>C\u1ea3 hai \u0111\u1ec1u k\u1eb9p back-EMF c\u1ee7a cu\u1ed9n d\u00e2y \u0111\u1ebfn kho\u1ea3ng 2\u00d7 Uc, nh\u01b0ng ch\u00fang kh\u00e1c nhau \u1edf hai \u0111i\u1ec3m quan tr\u1ecdng. Diode TVS hai chi\u1ec1u cung c\u1ea5p ph\u1ea3n h\u1ed3i nhanh h\u01a1n (d\u01b0\u1edbi nano gi\u00e2y) v\u00e0 t\u00e1c \u0111\u1ed9ng kh\u00f4ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn th\u1eddi gian nh\u1ea3, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng nh\u1ea1y c\u1ea3m v\u1ec1 th\u1eddi gian v\u00e0 EMI. Varistor ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ed1t h\u01a1n c\u00e1c xung n\u0103ng l\u01b0\u1ee3ng cao t\u1eeb c\u00e1c cu\u1ed9n d\u00e2y l\u1edbn v\u00e0 chi ph\u00ed th\u1ea5p h\u01a1n, nh\u01b0ng n\u00f3 xu\u1ed1ng c\u1ea5p theo th\u1eddi gian khi ho\u1ea1t \u0111\u1ed9ng l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. \u0110\u1ed1i v\u1edbi contactor khung l\u1edbn, chu k\u1ef3 cao, h\u00e3y x\u00e1c minh r\u1eb1ng \u0111\u1ecbnh m\u1ee9c c\u00f4ng su\u1ea5t xung \u0111\u1ec9nh c\u1ee7a diode TVS ($P_{PP}$) v\u01b0\u1ee3t qu\u00e1 n\u0103ng l\u01b0\u1ee3ng d\u1ef1 tr\u1eef c\u1ee7a cu\u1ed9n d\u00e2y \u2014 n\u1ebfu kh\u00f4ng, varistor c\u00f3 th\u1ec3 l\u00e0 l\u1ef1a ch\u1ecdn an to\u00e0n h\u01a1n.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 145px; left: 610.25px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 145px; left: 610.25px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 749.953px; left: 14px; display: flex;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 145px; left: 312.625px; display: none;\" data-hover=\"0\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Low-voltage contactors are the workhorses of motor control. Their ability to switch loads rapidly and reliably \u2014 with electrical endurance ratings exceeding one million operations \u2014 makes them indispensable across industrial automation, HVAC systems, and power distribution. But every switching event has a hidden cost: the transient voltage spike generated when the contactor coil de-energizes. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":22460,"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-22458","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\/22458","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=22458"}],"version-history":[{"count":2,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/22458\/revisions"}],"predecessor-version":[{"id":22461,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/22458\/revisions\/22461"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/22460"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=22458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=22458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=22458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}