{"id":18100,"date":"2020-10-07T08:31:51","date_gmt":"2020-10-07T08:31:51","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=18100"},"modified":"2024-07-03T12:56:47","modified_gmt":"2024-07-03T05:56:47","slug":"dien-tro-day-cuon-la-gi-nguyen-ly-hoat-dong-cua-dien-tro-day-cuon","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=18100","title":{"rendered":"\u0110i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 g\u00ec? Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n"},"content":{"rendered":"

\u0110i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t trong nh\u1eefng linh ki\u1ec7n ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed. Ng\u00e0y h\u00f4m nay, ch\u00fang ta s\u1ebd ti\u1ebfp t\u1ee5c t\u00ecm hi\u1ec3u v\u1ec1 \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 g\u00ec? C\u1ea5u t\u1ea1o v\u00e0 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 nh\u00e9!<\/span><\/p>\n

\"\u0110i\u1ec7n
\u0110i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 g\u00ec? Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n<\/span><\/figcaption><\/figure>\n

\u0110i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 g\u00ec? C\u1ea5u t\u1ea1o c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n<\/strong><\/span><\/h2>\n

\u0110i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 lo\u1ea1i \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o g\u1ed3m m\u1ed9t h\u1ee3p kim Niken-Crom h\u00ecnh th\u00e0nh l\u00ean cu\u1ed1n \u0111\u00e2y bao quanh v\u1eadt \u0111i\u1ec7n s\u1ee9 c\u00e1ch \u0111i\u1ec7n. Th\u00eam v\u00e0o \u0111\u00f3, \u0111\u1ec3 tr\u00e1nh d\u00e2y \u0111i\u1ec7n tr\u1edf b\u1ecb di chuy\u1ec3n khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean th\u00ec n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c cu\u1ed1n quanh l\u00f5i g\u1ed1m ho\u1eb7c s\u1ee9, ph\u1ee7 l\u1edbp mica b\u00ean ngo\u00e0i.<\/span><\/p>\n

\"C\u1ea5u
C\u1ea5u t\u1ea1o c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n<\/span><\/figcaption><\/figure>\n

T\u00ecm hi\u1ec3u th\u00eam: <\/span>T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 \u0111i\u1ec7n tr\u1edf \u2013 \u0110i\u1ec7n t\u1eed c\u0103n b\u1ea3n<\/span><\/a><\/span><\/p>\n

Ch\u00ednh nh\u1edd c\u1ea5u t\u1ea1o n\u00e0y m\u00e0 \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n th\u01b0\u1eddng c\u00f3 gi\u00e1 tr\u1ecb r\u1ea5t nh\u1ecf (Kho\u1ea3ng t\u1eeb 0,01 \u0111\u1ebfn 100K\u03a9). M\u1eb7c d\u00f9 v\u1eady ch\u00fang v\u1eabn c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c r\u1ea5t cao n\u00ean \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong c\u00e1c m\u1ea1ch \u0111o ho\u1eb7c m\u1ea1ch c\u1ea7u Wheatstone.<\/span><\/p>\n

\u0110\u1ec3 nh\u1eadn bi\u1ebft \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n, ta d\u1ef1a v\u00e0o k\u00fd hi\u1ec7u c\u1ee7a ch\u00fang. N\u1ebfu 2 k\u00fd hi\u1ec7u b\u1eaft \u0111\u1ea7u b\u1eb1ng \u201cWH\u201d th\u00ec \u0111\u00f3 l\u00e0 \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n<\/span><\/p>\n

Nh\u00ecn chung, \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n r\u1ea5t \u0111a d\u1ea1ng v\u1ec1 c\u1ea3 gi\u00e1 tr\u1ecb v\u00e0 c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng v\u1edbi m\u1ee5c \u0111\u00edch bi\u1ebfn d\u00f2ng \u0111i\u1ec7n qua n\u00f3 th\u00e0nh nhi\u1ec7t l\u01b0\u1ee3ng, l\u00ean t\u1edbi 1kW ho\u1eb7c \u0111\u00f3ng vai tr\u00f2 l\u00e0m ph\u1ea7n t\u1eed t\u1ecfa nhi\u1ec7t.<\/span><\/p>\n

C\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng li\u00ean quan \u0111\u1ebfn \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n<\/strong><\/span><\/h2>\n

D\u00f2ng \u0111i\u1ec7n \u0111i qua \u0111i\u1ec7n tr\u1edf<\/span><\/h3>\n

So v\u1edbi c\u00e1c lo\u1ea1i \u0111i\u1ec7n tr\u1edf kh\u00e1c th\u00ec \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu d\u00f2ng cao h\u01a1n h\u1eb3n khi \u1edf c\u00f9ng m\u1ee9c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/span><\/p>\n

C\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c<\/span><\/h3>\n

C\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n r\u1ea5t cao, l\u00ean t\u1edbi 300W. V\u00ec l\u00fd do n\u00e0y n\u00ean ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t trong t\u1ea3n nhi\u1ec7t nh\u00f4m v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eafn th\u00eam qu\u1ea1t l\u00e0m m\u00e1t.<\/span><\/p>\n

\"\u0110i\u1ec7n
\u0110i\u1ec7n tr\u1edf d\u00e2y qu\u1ea5n 50W<\/figcaption><\/figure>\n

Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n<\/strong><\/span><\/h2>\n

B\u1edfi c\u1ea5u t\u1ea1o c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 d\u1ea1ng d\u00e2y \u0111i\u1ec7n tr\u1edf cu\u1ed1n quanh n\u00ean ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c v\u00ed nh\u01b0 m\u1ed9t cu\u1ed9n c\u1ea3m k\u1ebft h\u1ee3p v\u1edbi \u0111i\u1ec7n tr\u1edf. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 h\u00ecnh th\u00e0nh l\u00ean hi\u1ec7n t\u01b0\u1ee3ng d\u1ecbch pha trong m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u.<\/span><\/p>\n

L\u00fac n\u00e0y, \u0111i\u1ec7n tr\u1edf s\u1ebd t\u1ea1o ra tr\u1edf kh\u00e1ng Z v\u00e0 \u0111i\u1ec7n dung Z \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c:\u00a0<\/span><\/p>\n

Z2<\/sup> = R2<\/sup> + X2<\/sup><\/strong><\/span><\/p>\n

Trong \u0111\u00f3:<\/span><\/p>\n

D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u AC c\u00f3 t\u1ea7n s\u1ed1 f.<\/span><\/p>\n

C\u1ea3m kh\u00e1ng \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c: XL<\/sub> = 2\u03c0\u0192L<\/strong>.<\/span><\/p>\n

T\u1eeb c\u00f4ng th\u1ee9c tr\u00ean ta c\u00f3 th\u1ec3 r\u00fat ra k\u1ebft lu\u1eadn r\u1eb1ng: C\u1ea3m kh\u00e1ng c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n s\u1ebd thay \u0111\u1ed5i theo t\u1ea7n s\u1ed1 c\u1ee7a d\u00f2ng \u0111i\u1ec7n. V\u1eady n\u00ean lo\u1ea1i \u0111i\u1ec7n tr\u1edf n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u m\u00e0 th\u00f4i.<\/span><\/p>\n

Tr\u00ean \u0111\u00e2y l\u00e0 chia s\u1ebb c\u1ee7a H\u1ecdc vi\u1ec7n iT.vn v\u1ec1 \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n. 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

C\u00e1c b\u00e0i vi\u1ebft li\u00ean quan:<\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf carbon l\u00e0 g\u00ec? \u1ee8ng d\u1ee5ng c\u1ee7a \u0111i\u1ec7n tr\u1edf carbon<\/a><\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf film l\u00e0 g\u00ec? Ph\u00e2n lo\u1ea1i \u0111i\u1ec7n tr\u1edf film<\/a><\/span><\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:
\n<\/i>C\u00d4NG TY C\u1ed4 PH\u1ea6N H\u1eccC VI\u1ec6N IT
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\nH\u1ecdc vi\u1ec7n IT.vn \u2013 Truy\u1ec1n ngh\u1ec1 th\u1ef1c t\u1ebf c\u00f9ng b\u1ea1n \u0111\u1ebfn th\u00e0nh c\u00f4ng!\u00a0<\/i><\/strong><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t trong nh\u1eefng linh ki\u1ec7n ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed. Ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 \u0111i\u1ec7n tr\u1edf d\u00e2y cu\u1ed1n l\u00e0 g\u00ec.<\/p>\n","protected":false},"author":95,"featured_media":18102,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[734],"tags":[245],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/18100"}],"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=18100"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/18100\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/18102"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18100"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18100"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}