{"id":701333,"date":"2024-09-11T21:26:27","date_gmt":"2024-09-11T20:26:27","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=701333"},"modified":"2024-09-11T21:26:27","modified_gmt":"2024-09-11T20:26:27","slug":"hanh-vi-nhiet-cua-dong-co-dien","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/hanh-vi-nhiet-cua-dong-co-dien\/","title":{"rendered":"H\u00e0nh vi nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n"},"content":{"rendered":"<p class=\"sidekick\">H\u00e0nh vi nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n: T\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, c\u00f9ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m so\u00e1t nhi\u1ec7t hi\u1ec7u qu\u1ea3.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/hanh_vi_nhiet_cua_dong_co_dien.png\" alt=\"H\u00e0nh vi nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>H\u00e0nh Vi Nhi\u1ec7t C\u1ee7a \u0110\u1ed9ng C\u01a1 \u0110i\u1ec7n<\/h2>\n<p>\u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n l\u00e0 thi\u1ebft b\u1ecb chuy\u1ec3n h\u00f3a n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n th\u00e0nh c\u01a1 n\u0103ng. Trong qu\u00e1 tr\u00ecnh n\u00e0y, \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n c\u0169ng ph\u00e1t sinh nhi\u1ec7t \u0111\u1ed9, v\u00e0 vi\u1ec7c ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 n\u00e0y l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/p>\n<h2>Nguy\u00ean Nh\u00e2n G\u00e2y Nhi\u1ec7t Trong \u0110\u1ed9ng C\u01a1 \u0110i\u1ec7n<\/h2>\n<ul>\n<li><b>\u0110i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y:<\/b> Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua c\u00e1c cu\u1ed9n d\u00e2y c\u1ee7a \u0111\u1ed9ng c\u01a1, \u0111i\u1ec7n tr\u1edf trong d\u00e2y d\u1eabn g\u00e2y ra nhi\u1ec7t. Nhi\u1ec7t l\u01b0\u1ee3ng n\u00e0y t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi \u0111i\u1ec7n tr\u1edf v\u00e0 b\u00ecnh ph\u01b0\u01a1ng c\u1ee7a d\u00f2ng \u0111i\u1ec7n (P = I<sup>2<\/sup>R).<\/li>\n<li><b>T\u1ed5n th\u1ea5t l\u00f5i t\u1eeb:<\/b> Trong qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i t\u1eeb tr\u01b0\u1eddng, l\u00f5i t\u1eeb c\u1ee7a \u0111\u1ed9ng c\u01a1 ch\u1ecbu t\u1ed5n th\u1ea5t do d\u00f2ng \u0111i\u1ec7n xo\u00e1y v\u00e0 t\u1ed5n th\u1ea5t t\u1eeb tr\u1ec5, t\u1ea1o ra nhi\u1ec7t.<\/li>\n<li><b>Ma s\u00e1t:<\/b> Ch\u1ecbu l\u1ef1c t\u1eeb c\u00e1c ph\u1ea7n chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9ng c\u01a1 g\u00e2y ra nhi\u1ec7t do ma s\u00e1t.<\/li>\n<\/ul>\n<h2>H\u1ec7 Th\u1ed1ng L\u00e0m M\u00e1t \u0110\u1ed9ng C\u01a1 \u0110i\u1ec7n<\/h2>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ec1n b\u1ec9, vi\u1ec7c l\u00e0m m\u00e1t l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t th\u01b0\u1eddng d\u00f9ng l\u00e0:<\/p>\n<ol>\n<li><b>L\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed:<\/b> Kh\u00f4ng kh\u00ed \u0111\u01b0\u1ee3c qu\u1ea1t th\u1ed5i qua c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111\u1ec3 mang nhi\u1ec7t ra ngo\u00e0i.<\/li>\n<li><b>L\u00e0m m\u00e1t b\u1eb1ng d\u1ea7u:<\/b> D\u1ea7u \u0111\u01b0\u1ee3c lu\u00e2n chuy\u1ec3n qua c\u00e1c k\u00eanh l\u00e0m m\u00e1t trong \u0111\u1ed9ng c\u01a1, h\u1ea5p th\u1ee5 nhi\u1ec7t v\u00e0 sau \u0111\u00f3 \u0111\u01b0\u1ee3c l\u00e0m m\u00e1t \u1edf b\u00ean ngo\u00e0i.<\/li>\n<li><b>L\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc:<\/b> Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1eed d\u1ee5ng n\u01b0\u1edbc ho\u1eb7c ch\u1ea5t l\u1ecfng l\u00e0m m\u00e1t \u0111\u1ec3 l\u00e0m gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111\u1ed9ng c\u01a1, th\u01b0\u1eddng d\u00f9ng trong c\u00e1c \u0111\u1ed9ng c\u01a1 c\u00f4ng su\u1ea5t l\u1edbn.<\/li>\n<\/ol>\n<h2>Ph\u01b0\u01a1ng Tr\u00ecnh Nhi\u1ec7t \u0110\u1ed9ng H\u1ecdc C\u01a1 B\u1ea3n<\/h2>\n<p>\u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean c\u00e1c nguy\u00ean l\u00fd c\u1ee7a nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng tr\u00ecnh c\u01a1 b\u1ea3n:<\/p>\n<ul>\n<li><b>Ph\u01b0\u01a1ng tr\u00ecnh c\u00e2n b\u1eb1ng nhi\u1ec7t:<\/b><br \/>\n        \\[<br \/>\n        Q_{n\u1ea1p} = Q_{t\u1ed5n th\u1ea5t} + Q_{l\u00e0m m\u00e1t}<br \/>\n        \\]\n        Trong \u0111\u00f3:<\/p>\n<ul>\n<li>Q<sub>n\u1ea1p<\/sub>: nhi\u1ec7t l\u01b0\u1ee3ng do c\u00e1c ngu\u1ed3n g\u00e2y nhi\u1ec7t cung c\u1ea5p.<\/li>\n<li>Q<sub>t\u1ed5n th\u1ea5t<\/sub>: nhi\u1ec7t l\u01b0\u1ee3ng th\u1ea5t tho\u00e1t do c\u00e1c qu\u00e1 tr\u00ecnh b\u00ean trong \u0111\u1ed9ng c\u01a1.<\/li>\n<li>Q<sub>l\u00e0m m\u00e1t<\/sub>: nhi\u1ec7t l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf b\u1eb1ng h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t.<\/li>\n<\/ul>\n<\/li>\n<li><b>C\u00f4ng th\u1ee9c l\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed:<\/b><br \/>\n        \\[<br \/>\n        Q = hA(T_d &#8211; T_m)<br \/>\n        \\]\n        Trong \u0111\u00f3:<\/p>\n<ul>\n<li>h: h\u1ec7 s\u1ed1 truy\u1ec1n nhi\u1ec7t.<\/li>\n<li>A: di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t l\u00e0m m\u00e1t.<\/li>\n<li>T<sub>d<\/sub>: nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed9ng c\u01a1.<\/li>\n<li>T<sub>m<\/sub>: nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Vi\u1ec7c hi\u1ec3u r\u00f5 h\u00e0nh vi nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n l\u00e0 quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u1ee7a n\u00f3. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u00e0m m\u00e1t v\u00e0 c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc gi\u00fap ch\u00fang ta duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cho \u0111\u1ed9ng c\u01a1, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng v\u00e0 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd thi\u1ebft b\u1ecb.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u00e0nh vi nhi\u1ec7t c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n: T\u00ecm hi\u1ec3u c\u00e1ch nhi\u1ec7t \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, c\u00f9ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m so\u00e1t nhi\u1ec7t 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":"<!-- 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