{"id":680787,"date":"2024-10-03T03:57:18","date_gmt":"2024-10-03T02:57:18","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=680787"},"modified":"2024-10-03T03:57:18","modified_gmt":"2024-10-03T02:57:18","slug":"bien-doi-nhiet-trong-he-thong-dien","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/bien-doi-nhiet-trong-he-thong-dien\/","title":{"rendered":"Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n"},"content":{"rendered":"<p class=\"sidekick\">Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n: c\u00e1ch nhi\u1ec7t n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i v\u00e0 qu\u1ea3n l\u00fd trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/bien_doi_nhiet_trong_he_thong_dien.png\" alt=\"Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Bi\u1ebfn \u0111\u1ed5i Nhi\u1ec7t trong H\u1ec7 th\u1ed1ng \u0110i\u1ec7n<\/h2>\n<p>Trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 r\u1ea5t quan tr\u1ecdng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a thi\u1ebft b\u1ecb. Hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c qu\u00e1 tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 gi\u00fap c\u1ea3i thi\u1ec7n thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.<\/p>\n<h2>C\u00e1ch Nhi\u1ec7t \u0111\u01b0\u1ee3c T\u1ea1o ra trong H\u1ec7 th\u1ed1ng \u0110i\u1ec7n<\/h2>\n<p>Nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u1ea1o ra ch\u1ee7 y\u1ebfu do ba nguy\u00ean nh\u00e2n ch\u00ednh: t\u1ed5n th\u1ea5t \u0111i\u1ec7n m\u00f4i, hi\u1ec7u \u1ee9ng Joule v\u00e0 t\u1ed5n th\u1ea5t t\u1eeb tr\u01b0\u1eddng.<\/p>\n<ul>\n<li><b>T\u1ed5n th\u1ea5t \u0111i\u1ec7n m\u00f4i:<\/b> \u0110\u00e2y l\u00e0 nhi\u1ec7t t\u1ea1o ra do s\u1ef1 ion h\u00f3a ho\u1eb7c bi\u1ebfn \u0111\u1ed5i c\u1ee7a \u0111i\u1ec7n m\u00f4i khi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) ch\u1ea1y qua. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, t\u1ed5n th\u1ea5t n\u00e0y kh\u00e1 nh\u1ecf nh\u01b0ng c\u00f3 th\u1ec3 t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3 trong c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 \u0111i\u1ec7n \u00e1p cao.<\/li>\n<li><b>Hi\u1ec7u \u1ee9ng Joule:<\/b> Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua m\u1ed9t d\u00e2y d\u1eabn, \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn s\u1ebd g\u00e2y ra s\u1ef1 ti\u00eau hao n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng nhi\u1ec7t. Quy lu\u1eadt Joule \u0111\u01b0\u1ee3c di\u1ec5n t\u1ea3 b\u1edfi c\u00f4ng th\u1ee9c P = I<sup>2<\/sup>R, trong \u0111\u00f3 P l\u00e0 c\u00f4ng su\u1ea5t, I l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 R l\u00e0 \u0111i\u1ec7n tr\u1edf.<\/li>\n<li><b>T\u1ed5n th\u1ea5t t\u1eeb tr\u01b0\u1eddng:<\/b> Khi m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh ch\u1ea1y qua m\u1ed9t v\u1eadt li\u1ec7u d\u1eabn t\u1eeb, n\u00f3 s\u1ebd t\u1ea1o ra nhi\u1ec7t do ma s\u00e1t n\u1ed9i t\u1ea1i v\u00e0 t\u1ed5n th\u1ea5t eddy current (d\u00f2ng xo\u00e1y).<\/li>\n<\/ul>\n<h2>\u0110i\u1ec1u Khi\u1ec3n v\u00e0 Gi\u1ea3i Nhi\u1ec7t trong H\u1ec7 th\u1ed1ng \u0110i\u1ec7n<\/h2>\n<p>\u0110\u1ec3 ki\u1ec3m so\u00e1t nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, c\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p v\u00e0 thi\u1ebft k\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng:<\/p>\n<ol>\n<li><b>L\u00e0m m\u00e1t b\u1eb1ng kh\u00f4ng kh\u00ed ho\u1eb7c n\u01b0\u1edbc:<\/b> C\u00e1c qu\u1ea1t v\u00e0 h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n. H\u1ec7 th\u1ed1ng n\u00e0y c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf c\u00fam nhi\u1ec7t ra kh\u1ecfi khu v\u1ef1c quan tr\u1ecdng v\u00e0 tr\u00e1nh \u0111\u01b0\u1ee3c qu\u00e1 nhi\u1ec7t.<\/li>\n<li><b>Ch\u1ea5t d\u1eabn nhi\u1ec7t v\u00e0 gi\u1ea3i nhi\u1ec7t:<\/b> S\u1eed d\u1ee5ng c\u00e1c ch\u1ea5t c\u00f3 t\u00ednh d\u1eabn nhi\u1ec7t cao nh\u01b0 \u0111\u1ed3ng ho\u1eb7c c\u00e1c h\u1ee3p kim nh\u00f4m \u0111\u1ec3 d\u1eabn nhi\u1ec7t ra kh\u1ecfi khu v\u1ef1c c\u1ea7n l\u00e0m m\u00e1t.<\/li>\n<li><b>Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 t\u1ef1 \u0111\u1ed9ng:<\/b> H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n nhi\u1ec7t \u0111\u1ed9 t\u1ef1 \u0111\u1ed9ng s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh d\u00f2ng \u0111i\u1ec7n ho\u1eb7c t\u00edn hi\u1ec7u, t\u1eeb \u0111\u00f3 gi\u1ea3m s\u1ef1 ph\u00e1t nhi\u1ec7t kh\u00f4ng mong mu\u1ed1n.<\/li>\n<\/ol>\n<h2>T\u1ea7m quan tr\u1ecdng c\u1ee7a Bi\u1ebfn \u0111\u1ed5i Nhi\u1ec7t trong Thi\u1ebft k\u1ebf H\u1ec7 th\u1ed1ng \u0110i\u1ec7n<\/h2>\n<p>Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t c\u00f3 th\u1ec3 g\u00e2y ra nhi\u1ec1u v\u1ea5n \u0111\u1ec1 n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u00fang c\u00e1ch. Qu\u00e1 nhi\u1ec7t c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng thi\u1ebft b\u1ecb, gi\u1ea3m tu\u1ed5i th\u1ecd v\u00e0 t\u0103ng nguy c\u01a1 ch\u00e1y n\u1ed5. V\u00ec th\u1ebf, vi\u1ec7c hi\u1ec3u r\u00f5 v\u00e0 qu\u1ea3n l\u00fd bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong thi\u1ebft k\u1ebf v\u00e0 v\u1eadn h\u00e0nh c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p>Qua \u0111\u00f3, bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c m\u00e0 c\u00f2n l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 then ch\u1ed1t gi\u00fap t\u0103ng c\u01b0\u1eddng hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n khi \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd h\u1ee3p l\u00fd.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n: c\u00e1ch nhi\u1ec7t n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i v\u00e0 qu\u1ea3n l\u00fd trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.<\/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>Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n<\/title>\n<meta name=\"description\" content=\"Bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n: c\u00e1ch nhi\u1ec7t n\u0103ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i v\u00e0 qu\u1ea3n l\u00fd trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n, t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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