{"id":697723,"date":"2024-07-19T05:31:39","date_gmt":"2024-07-19T04:31:39","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=697723"},"modified":"2024-07-19T05:31:39","modified_gmt":"2024-07-19T04:31:39","slug":"phan-tich-nhiet-cua-cac-thiet-bi-dien-tu","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/phan-tich-nhiet-cua-cac-thiet-bi-dien-tu\/","title":{"rendered":"Ph\u00e2n t\u00edch nhi\u1ec7t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed"},"content":{"rendered":"<p class=\"sidekick\">Ph\u00e2n t\u00edch nhi\u1ec7t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed: t\u00ecm hi\u1ec3u c\u00e1ch qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9, t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/phan_tich_nhiet_cua_cac_thiet_bi_dien_tu.png\" alt=\"Ph\u00e2n t\u00edch nhi\u1ec7t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Ph\u00e2n T\u00edch Nhi\u1ec7t c\u1ee7a C\u00e1c Thi\u1ebft B\u1ecb \u0110i\u1ec7n T\u1eed<\/h2>\n<p>Trong k\u1ef9 thu\u1eadt nhi\u1ec7t, vi\u1ec7c ph\u00e2n t\u00edch nhi\u1ec7t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed l\u00e0 m\u1ed9t ho\u1ea1t \u0111\u1ed9ng quan tr\u1ecdng gi\u00fap \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb n\u00e0y. Do s\u1ef1 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng c\u1ee7a c\u00f4ng ngh\u1ec7, c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ng\u00e0y c\u00e0ng tr\u1edf n\u00ean nh\u1ecf g\u1ecdn v\u00e0 m\u1ea1nh m\u1ebd h\u01a1n, d\u1eabn \u0111\u1ebfn s\u1ef1 ph\u00e1t sinh nhi\u1ec7t cao h\u01a1n. V\u00ec v\u1eady, hi\u1ec3u r\u00f5 quy tr\u00ecnh ph\u00e2n t\u00edch nhi\u1ec7t gi\u00fap gi\u1ea3m thi\u1ec3u c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao v\u00e0 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/p>\n<h2>T\u1ea7m Quan Tr\u1ecdng c\u1ee7a Ph\u00e2n T\u00edch Nhi\u1ec7t<\/h2>\n<ul>\n<li><b>\u0110\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t:<\/b> Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed. Ph\u00e2n t\u00edch nhi\u1ec7t gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m n\u00f3ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng t\u1ea3n nhi\u1ec7t.<\/li>\n<li><b>T\u0103ng tu\u1ed5i th\u1ecd:<\/b> Nhi\u1ec7t \u0111\u1ed9 cao l\u00e2u d\u00e0i c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng v\u00e0 gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed. B\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9, tu\u1ed5i th\u1ecd c\u1ee7a thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i.<\/li>\n<li><b>An to\u00e0n:<\/b> Nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c s\u1ef1 c\u1ed1 nguy hi\u1ec3m nh\u01b0 ch\u1eadp \u0111i\u1ec7n ho\u1eb7c ch\u00e1y n\u1ed5. Ph\u00e2n t\u00edch nhi\u1ec7t gi\u00fap d\u1ef1 \u0111o\u00e1n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c r\u1ee7i ro n\u00e0y.<\/li>\n<\/ul>\n<h2>C\u00e1c Ph\u01b0\u01a1ng Ph\u00e1p Ph\u00e2n T\u00edch Nhi\u1ec7t<\/h2>\n<ol>\n<li><b>Ph\u00e2n t\u00edch b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c nghi\u1ec7m:<\/b> S\u1eed d\u1ee5ng c\u00e1c c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 t\u1ea1i c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau tr\u00ean thi\u1ebft b\u1ecb. K\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m c\u00f3 th\u1ec3 cung c\u1ea5p d\u1eef li\u1ec7u th\u1ef1c t\u1ebf \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t t\u1ea3n nhi\u1ec7t.<\/li>\n<li><b>Ph\u00e2n t\u00edch b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng:<\/b> S\u1eed d\u1ee5ng c\u00e1c ph\u1ea7n m\u1ec1m m\u00f4 ph\u1ecfng nhi\u1ec7t \u0111\u1ec3 d\u1ef1 \u0111o\u00e1n s\u1ef1 ph\u00e2n b\u1ed1 nhi\u1ec7t v\u00e0 hi\u1ec7u su\u1ea5t t\u1ea3n nhi\u1ec7t c\u1ee7a thi\u1ebft b\u1ecb. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 chi ph\u00ed h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c nghi\u1ec7m.<\/li>\n<\/ol>\n<h2>C\u00e1c Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn Nhi\u1ec7t \u0110\u1ed9 C\u1ee7a Thi\u1ebft B\u1ecb \u0110i\u1ec7n T\u1eed<\/h2>\n<ul>\n<li><b>\u0110i\u1ec7n tr\u1edf:<\/b> \u0110i\u1ec7n tr\u1edf c\u1ee7a c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed s\u1ebd sinh ra nhi\u1ec7t khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua. Nhi\u1ec7t l\u01b0\u1ee3ng sinh ra th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c <code>Q = I^2 * R<\/code>, trong \u0111\u00f3 <code>I<\/code> l\u00e0 d\u00f2ng \u0111i\u1ec7n v\u00e0 <code>R<\/code> l\u00e0 \u0111i\u1ec7n tr\u1edf.<\/li>\n<li><b>D\u00f2ng \u0111i\u1ec7n:<\/b> D\u00f2ng \u0111i\u1ec7n c\u00e0ng l\u1edbn th\u00ec nhi\u1ec7t l\u01b0\u1ee3ng sinh ra c\u00e0ng nhi\u1ec1u.<\/li>\n<li><b>\u0110i\u1ec7n \u00e1p:<\/b> \u0110i\u1ec7n \u00e1p cao c\u00f3 th\u1ec3 l\u00e0m t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a thi\u1ebft b\u1ecb.<\/li>\n<li><b>C\u1ea5u tr\u00fac v\u00e0 v\u1eadt li\u1ec7u:<\/b> C\u00e1c v\u1eadt li\u1ec7u c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t t\u1ed1t nh\u01b0 \u0111\u1ed3ng v\u00e0 nh\u00f4m th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea3n nhi\u1ec7t, trong khi nh\u1eefng v\u1eadt li\u1ec7u c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t k\u00e9m nh\u01b0 nh\u1ef1a c\u00f3 th\u1ec3 l\u00e0m t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a thi\u1ebft b\u1ecb.<\/li>\n<\/ul>\n<p>M\u1ed9t c\u00f4ng th\u1ee9c quan tr\u1ecdng trong vi\u1ec7c t\u00ednh to\u00e1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a linh ki\u1ec7n l\u00e0:<\/p>\n<p><code>T_j = T_a + (P_d * \u03b8_jc)<\/code><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><code>T_j<\/code> l\u00e0 nhi\u1ec7t \u0111\u1ed9 junction (nhi\u1ec7t \u0111\u1ed9 \u1edf \u0111i\u1ec3m k\u1ebft n\u1ed1i trong linh ki\u1ec7n)<\/li>\n<li><code>T_a<\/code> l\u00e0 nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/li>\n<li><code>P_d<\/code> l\u00e0 c\u00f4ng su\u1ea5t ti\u00eau th\u1ee5<\/li>\n<li><code>\u03b8_jc<\/code> l\u00e0 tr\u1edf kh\u00e1ng nhi\u1ec7t t\u1eeb junction \u0111\u1ebfn casing<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Ph\u00e2n t\u00edch nhi\u1ec7t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, hi\u1ec7u su\u1ea5t cao v\u00e0 an to\u00e0n. B\u1eb1ng c\u00e1ch hi\u1ec3u r\u00f5 quy tr\u00ecnh v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9, c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 v\u00e0 n\u00e2ng cao tu\u1ed5i th\u1ecd cho thi\u1ebft b\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ph\u00e2n t\u00edch nhi\u1ec7t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed: t\u00ecm hi\u1ec3u c\u00e1ch qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9, t\u1ea3n nhi\u1ec7t hi\u1ec7u qu\u1ea3 \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - 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