{"id":707436,"date":"2024-11-05T00:32:27","date_gmt":"2024-11-04T23:32:27","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=707436"},"modified":"2024-11-05T00:32:27","modified_gmt":"2024-11-04T23:32:27","slug":"quan-ly-nhiet-trong-thiet-bi-dien-tu","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/quan-ly-nhiet-trong-thiet-bi-dien-tu\/","title":{"rendered":"Qu\u1ea3n l\u00fd nhi\u1ec7t trong thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed"},"content":{"rendered":"<p class=\"sidekick\">Qu\u1ea3n l\u00fd nhi\u1ec7t trong thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed: t\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n thi\u1ebft b\u1ecb th\u00f4ng qua vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 hi\u1ec7u qu\u1ea3.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/quan_ly_nhiet_trong_thiet_bi_dien_tu.png\" alt=\"Qu\u1ea3n l\u00fd nhi\u1ec7t trong thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Qu\u1ea3n l\u00fd Nhi\u1ec7t trong Thi\u1ebft B\u1ecb \u0110i\u1ec7n T\u1eed<\/h2>\n<p>Trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i, qu\u1ea3n l\u00fd nhi\u1ec7t l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a thi\u1ebft b\u1ecb. Nhi\u1ec7t \u0111\u1ed9 t\u0103ng cao c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 gi\u1ea3m hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng, g\u00e2y h\u1ecfng h\u00f3c v\u00e0 gi\u1ea3m tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed.<\/p>\n<h2>Nguy\u00ean nh\u00e2n G\u00e2y Ra Nhi\u1ec7t Trong Thi\u1ebft B\u1ecb \u0110i\u1ec7n T\u1eed<\/h2>\n<p>Nhi\u1ec7t l\u01b0\u1ee3ng trong c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed sinh ra ch\u1ee7 y\u1ebfu do s\u1ef1 ti\u00eau hao \u0111i\u1ec7n n\u0103ng. C\u00e1c nguy\u00ean nh\u00e2n ch\u00ednh bao g\u1ed3m:<\/p>\n<p><u1><\/p>\n<li><b>Qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i \u0111i\u1ec7n n\u0103ng :<\/b> C\u00e1c linh ki\u1ec7n nh\u01b0 transistor v\u00e0 IC ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 chuy\u1ec3n \u0111\u1ed5i m\u1ed9t ph\u1ea7n n\u0103ng l\u01b0\u1ee3ng n\u00e0y th\u00e0nh nhi\u1ec7t.<\/li>\n<li><b>\u0110i\u1ec7n tr\u1edf c\u1ee7a linh ki\u1ec7n :<\/b> D\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 \u0111i\u1ec7n tr\u1edf t\u1ea1o ra nhi\u1ec7t theo c\u00f4ng th\u1ee9c <i>P = I<sup>2<\/sup> * R<\/i>, trong \u0111\u00f3 P l\u00e0 c\u00f4ng su\u1ea5t nhi\u1ec7t, I l\u00e0 d\u00f2ng \u0111i\u1ec7n v\u00e0 R l\u00e0 \u0111i\u1ec7n tr\u1edf.<\/li>\n<li><b>C\u00e1c t\u1ee5 \u0111i\u1ec7n v\u00e0 cu\u1ed9n c\u1ea3m :<\/b> Nh\u1eefng linh ki\u1ec7n n\u00e0y c\u0169ng sinh nhi\u1ec7t do s\u1ef1 m\u1ea5t m\u00e1t n\u0103ng l\u01b0\u1ee3ng trong qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef v\u00e0 ph\u00f3ng th\u00edch n\u0103ng l\u01b0\u1ee3ng.<\/li>\n<p><\/u1><\/p>\n<h2>Ph\u01b0\u01a1ng Ph\u00e1p Qu\u1ea3n L\u00fd Nhi\u1ec7t<\/h2>\n<p>\u0110\u1ec3 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed, nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng, bao g\u1ed3m:<\/p>\n<p><u1><\/p>\n<li><b>T\u1ea3n nhi\u1ec7t:<\/b> S\u1eed d\u1ee5ng c\u00e1c b\u1ed9 ph\u1eadn t\u1ea3n nhi\u1ec7t nh\u01b0 qu\u1ea1t v\u00e0 l\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc \u0111\u1ec3 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e1c linh ki\u1ec7n quan tr\u1ecdng.<\/li>\n<li><b>S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u d\u1eabn nhi\u1ec7t t\u1ed1t:<\/b> C\u00e1c v\u1eadt li\u1ec7u nh\u01b0 \u0111\u1ed3ng v\u00e0 nh\u00f4m th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 d\u1eabn nhi\u1ec7t hi\u1ec7u qu\u1ea3 ra kh\u1ecfi c\u00e1c v\u00f9ng n\u00f3ng.<\/li>\n<li><b>Thi\u1ebft k\u1ebf m\u1ea1ch h\u1ee3p l\u00fd:<\/b> B\u1ed1 tr\u00ed c\u00e1c linh ki\u1ec7n v\u00e0 \u0111\u01b0\u1eddng d\u1eabn nhi\u1ec7t m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a lu\u1ed3ng nhi\u1ec7t.<\/li>\n<li><b>S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t:<\/b> V\u1eadt li\u1ec7u c\u00e1ch nhi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3m truy\u1ec1n nhi\u1ec7t kh\u00f4ng mong mu\u1ed1n gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nhau.<\/li>\n<li><b>Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng:<\/b> \u0110\u1eb7t c\u00e1c thi\u1ebft b\u1ecb \u1edf n\u01a1i c\u00f3 m\u00f4i tr\u01b0\u1eddng m\u00e1t m\u1ebb v\u00e0 s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng \u0111i\u1ec1u ho\u00e0 \u0111\u1ec3 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 xung quanh.<\/li>\n<p><\/u1><\/p>\n<h2>T\u00ednh To\u00e1n Nhi\u1ec7t Trong Thi\u1ebft B\u1ecb \u0110i\u1ec7n T\u1eed<\/h2>\n<p>\u0110\u1ec3 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd nhi\u1ec7t hi\u1ec7u qu\u1ea3, c\u00e1c k\u1ef9 s\u01b0 s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c v\u00e0 ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n nhi\u1ec7t l\u01b0\u1ee3ng. M\u1ed9t trong nh\u1eefng c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh d\u00f2ng nhi\u1ec7t:<\/p>\n<p>Q = h * A * (T<sub>1<\/sub> &#8211; T<sub>2<\/sub>),<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<p><u1><\/p>\n<li>Q l\u00e0 d\u00f2ng nhi\u1ec7t (Watt).<\/li>\n<li>h l\u00e0 h\u1ec7 s\u1ed1 t\u1ecfa nhi\u1ec7t (W\/m<sup>2<\/sup>*K).<\/li>\n<li>A l\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t (m<sup>2<\/sup>).<\/li>\n<li>T<sub>1<\/sub> v\u00e0 T<sub>2<\/sub> l\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a hai b\u1ec1 m\u1eb7t (K).<\/li>\n<p><\/u1><\/p>\n<p>K\u1ef9 thu\u1eadt t\u00ednh to\u00e1n n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n thi\u1ebft cho vi\u1ec7c t\u1ea3n nhi\u1ec7t v\u00e0 ch\u1ecdn l\u1ef1a v\u1eadt li\u1ec7u, thi\u1ebft b\u1ecb l\u00e0m m\u00e1t ph\u00f9 h\u1ee3p.<\/p>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Qu\u1ea3n l\u00fd nhi\u1ec7t l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed. Vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1ch nhi\u1ec7t sinh ra v\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3m nhi\u1ec7t ch\u00ednh l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng b\u1ec1n b\u1ec9 v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u1ea3n l\u00fd nhi\u1ec7t trong thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed: t\u00ecm hi\u1ec3u c\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n thi\u1ebft b\u1ecb th\u00f4ng qua vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 hi\u1ec7u qu\u1ea3.<\/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 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu\u1ea3n l\u00fd 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