{"id":43523,"date":"2024-07-19T18:06:01","date_gmt":"2024-07-19T11:06:01","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=43523"},"modified":"2024-07-19T18:06:01","modified_gmt":"2024-07-19T11:06:01","slug":"dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=43523","title":{"rendered":"\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 linh ki\u1ec7n quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n t\u1eed v\u00e0 c\u00f4ng nghi\u1ec7p. V\u1eady b\u1ea1n \u0111\u00e3 bi\u1ebft \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec ch\u01b0a? H\u00e3y c\u00f9ng H\u1ecdc vi\u1ec7n iT t\u00ecm hi\u1ec3u ngay trong b\u00e0i vi\u1ebft n\u00e0y nh\u00e9!<\/span><\/p>\n<figure id=\"attachment_43525\" aria-describedby=\"caption-attachment-43525\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-43525 size-full\" title=\"\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t\" src=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat.jpg\" alt=\"\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t\" width=\"750\" height=\"400\" srcset=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat.jpg 750w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-300x160.jpg 300w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-510x272.jpg 510w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-43525\" class=\"wp-caption-text\">\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><b>\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec?<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 lo\u1ea1i <\/span><a href=\"https:\/\/hocvienit.vn\/tong-hop-kien-thuc-co-ban-ve-dien-tro\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 300;\">\u0111i\u1ec7n tr\u1edf<\/span><\/a><span style=\"font-weight: 300;\"> c\u00f3 c\u00f4ng su\u1ea5t c\u00e1ch \u0111i\u1ec7n cao, th\u01b0\u1eddng t\u1eeb 1W tr\u1edf l\u00ean. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ch \u0111i\u1ec7n c\u00f3 d\u00f2ng \u0111i\u1ec7n l\u1edbn, gi\u00fap b\u1ea3o v\u1ec7 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n kh\u1ecfi b\u1ecb h\u01b0 h\u1ecfng do qu\u00e1 t\u1ea3i. Do v\u1eady, ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb nh\u1eefng v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n t\u1ed1t, ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">C\u00e1ch nh\u1eadn bi\u1ebft \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t so v\u1edbi c\u00e1c \u0111i\u1ec7n tr\u1edf kh\u00e1c nh\u01b0 sau:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>C\u00f4ng su\u1ea5t: <\/b><span style=\"font-weight: 300;\">Cao h\u01a1n so v\u1edbi \u0111i\u1ec7n tr\u1edf th\u00f4ng th\u01b0\u1eddng (t\u1eeb 1W tr\u1edf l\u00ean).<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>V\u1eadt li\u1ec7u:<\/b><span style=\"font-weight: 300;\"> \u0110\u01b0\u1ee3c l\u00e0m t\u1eeb nh\u1eefng v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n t\u1ed1t v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao nh\u01b0 h\u1ee3p kim \u0111\u1ed3ng, niken crom, s\u1ee3i t\u00f3c ho\u1eb7c than ch\u00ec.<\/span><\/li>\n<\/ul>\n<figure id=\"attachment_43526\" aria-describedby=\"caption-attachment-43526\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-43526 size-full\" title=\"K\u00fd hi\u1ec7u c\u1ee7a \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t\" src=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-1.jpg\" alt=\"K\u00fd hi\u1ec7u c\u1ee7a \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t\" width=\"750\" height=\"400\" srcset=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-1.jpg 750w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-1-300x160.jpg 300w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-1-510x272.jpg 510w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-43526\" class=\"wp-caption-text\">K\u00fd hi\u1ec7u c\u1ee7a \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t<\/figcaption><\/figure>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">C\u00f4ng su\u1ea5t \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c:<\/span><\/p>\n<p style=\"text-align: center;\"><b>P = (I^2) * R<\/b><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">Trong \u0111\u00f3:<\/span><\/p>\n<p style=\"text-align: justify; padding-left: 40px;\"><b>P <\/b><span style=\"font-weight: 300;\">l\u00e0 c\u00f4ng su\u1ea5t (\u0110\u01a1n v\u1ecb: Watt)<\/span><\/p>\n<p style=\"text-align: justify; padding-left: 40px;\"><b>I <\/b><span style=\"font-weight: 300;\">l\u00e0 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua \u0111i\u1ec7n tr\u1edf (\u0110\u01a1n v\u1ecb: Ampere)<\/span><\/p>\n<p style=\"text-align: justify; padding-left: 40px;\"><b>R<\/b><span style=\"font-weight: 300;\"> l\u00e0 gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf (\u0110\u01a1n v\u1ecb: Ohm)<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd chuy\u1ec3n h\u00f3a \u0111i\u1ec7n n\u0103ng th\u00e0nh nhi\u1ec7t n\u0103ng theo hi\u1ec7u \u1ee9ng Joule. Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua \u0111i\u1ec7n tr\u1edf, c\u00e1c h\u1ea1t \u0111i\u1ec7n t\u1eed trong \u0111i\u1ec7n tr\u1edf s\u1ebd va ch\u1ea1m v\u1edbi c\u00e1c h\u1ea1t kh\u00e1c v\u00e0 g\u00e2y ra \u0111\u1ec1u nhi\u1ec7t, khi\u1ebfn nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111i\u1ec7n tr\u1edf t\u0103ng l\u00ean.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">Nh\u1edd nguy\u00ean l\u00fd tr\u00ean, \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t v\u00e0 t\u1ea1o ra nhi\u1ec7t trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><b>C\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t<\/b><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t \u0111\u01b0\u1ee3c chia ra th\u00e0nh:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>\u0110i\u1ec7n tr\u1edf su\u1ea5t c\u1ed1 \u0111\u1ecbnh:<\/b> <span style=\"font-weight: 300;\">L\u00e0 \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb kh\u00f4ng thay \u0111\u1ed5i theo th\u1eddi gian v\u00e0 \u0111i\u1ec7n \u00e1p. \u0110i\u1ec7n tr\u1edf su\u1ea5t c\u1ed1 \u0111\u1ecbnh th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb s\u1ee3i t\u00f3c, \u0111\u1ed3ng ho\u1eb7c c\u00e1c kim lo\u1ea1i kh\u00e1c. Ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ea1ch \u0111i\u1ec7n, vi\u1ec5n th\u00f4ng,&#8230;<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>\u0110i\u1ec7n tr\u1edf su\u1ea5t bi\u1ebfn thi\u00ean:<\/b> <span style=\"font-weight: 300;\">L\u00e0 \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb thay \u0111\u1ed5i theo th\u1eddi gian v\u00e0 \u0111i\u1ec7n \u00e1p. \u0110i\u1ec7n tr\u1edf bi\u1ebfn thi\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb than ch\u00ec ho\u1eb7c h\u1ee3p ch\u1ea5t b\u00e1n d\u1eabn. Ch\u00fang \u0111\u01b0\u1ee3c d\u00f9ng nhi\u1ec1u trong vi\u1ec7c gi\u1ea3m d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng, b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9.<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>\u0110i\u1ec7n tr\u1edf su\u1ea5t d\u1ed1c (NTC):<\/b><span style=\"font-weight: 300;\"> Gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng. Ch\u00fang \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb oxit kim lo\u1ea1i ho\u1eb7c polyme d\u1eabn \u0111i\u1ec7n. \u0110i\u1ec7n tr\u1edf su\u1ea5t d\u1ed1c th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng trong c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9, \u1ed5n \u0111\u1ecbnh d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec1u khi\u1ec3n qu\u00e1 nhi\u1ec7t.<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>\u0110i\u1ec7n tr\u1edf su\u1ea5t t\u0103ng (PTC):<\/b><span style=\"font-weight: 300;\"> Gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf t\u0103ng khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00e1c v\u1eadt li\u1ec7u c\u00f3 t\u00ednh ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9 nh\u01b0 polyme. \u0110i\u1ec7n tr\u1edf su\u1ea5t t\u0103ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 v\u00e0 c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9.<\/span><\/li>\n<li style=\"font-weight: 300;\" aria-level=\"1\"><b>\u0110i\u1ec7n tr\u1edf su\u1ea5t bi\u1ebfn d\u1ea1ng:<\/b><span style=\"font-weight: 300;\"> Gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf thay \u0111\u1ed5i khi b\u1ecb u\u1ed1n cong, n\u00e9n ho\u1eb7c k\u00e9o d\u00e0i. Ch\u00fang hay \u0111\u01b0\u1ee3c d\u00f9ng trong c\u1ea3m bi\u1ebfn l\u1ef1c, c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t v\u00e0 thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng.<\/span><\/li>\n<\/ul>\n<figure id=\"attachment_43527\" aria-describedby=\"caption-attachment-43527\" style=\"width: 750px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-43527 size-full\" title=\"H\u00ecnh d\u00e1ng \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t tr\u00ean th\u1ef1c t\u1ebf\" src=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-2.jpg\" alt=\"H\u00ecnh d\u00e1ng \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t tr\u00ean th\u1ef1c t\u1ebf\" width=\"750\" height=\"400\" srcset=\"https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-2.jpg 750w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-2-300x160.jpg 300w, https:\/\/hocvienit.vn\/wp-content\/uploads\/2024\/07\/dien-tro-cong-suat-la-gi-cac-loai-dien-tro-cong-suat-2-510x272.jpg 510w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><figcaption id=\"caption-attachment-43527\" class=\"wp-caption-text\">H\u00ecnh d\u00e1ng \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t tr\u00ean th\u1ef1c t\u1ebf<\/figcaption><\/figure>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 300;\">Tr\u00ean \u0111\u00e2y l\u00e0 chia s\u1ebb c\u1ee7a H\u1ecdc vi\u1ec7n iT v\u1ec1 \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec v\u00e0 c\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t. Hy v\u1ecdng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 gi\u00fap \u00edch cho b\u1ea1n trong qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp v\u00e0 l\u00e0m vi\u1ec7c. N\u1ebfu c\u00f3 b\u1ea5t c\u1ee9 th\u1eafc m\u1eafc n\u00e0o th\u00ec h\u00e3y \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn ngay d\u01b0\u1edbi b\u00e0i vi\u1ebft n\u00e0y ho\u1eb7c inbox tr\u1ef1c ti\u1ebfp cho HOCVIENiT.vn \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p t\u1ed1t nh\u1ea5t. Ch\u00fac b\u1ea1n th\u00e0nh c\u00f4ng!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 linh ki\u1ec7n quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n t\u1eed v\u00e0 c\u00f4ng nghi\u1ec7p. V\u1eady b\u1ea1n \u0111\u00e3 bi\u1ebft \u0111i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec ch\u01b0a? H\u00e3y c\u00f9ng H\u1ecdc vi\u1ec7n iT t\u00ecm hi\u1ec3u ngay trong b\u00e0i vi\u1ebft n\u00e0y nh\u00e9! \u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 g\u00ec? \u0110i\u1ec7n tr\u1edf c\u00f4ng su\u1ea5t l\u00e0 lo\u1ea1i \u0111i\u1ec7n [&#8230;]\n","protected":false},"author":95,"featured_media":43525,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[95,94],"tags":[],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/43523"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=43523"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/43523\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/43525"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=43523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=43523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=43523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}