{"id":2132,"date":"2018-07-09T02:26:36","date_gmt":"2018-07-09T02:26:36","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=2132"},"modified":"2024-11-21T16:43:15","modified_gmt":"2024-11-21T09:43:15","slug":"cuon-cam-1-cau-tao-va-cac-dai-luong-dac-trung","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=2132","title":{"rendered":"Cu\u1ed9n c\u1ea3m 1: C\u1ea5u t\u1ea1o v\u00e0 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng"},"content":{"rendered":"
\"Cu\u1ed9n
Cu\u1ed9n c\u1ea3m 1: C\u1ea5u t\u1ea1o v\u00e0 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng<\/figcaption><\/figure>\n

1. Kh\u00e1i ni\u1ec7m<\/strong><\/span><\/h2>\n

Cu\u1ed9n c\u1ea3m l\u00e0 m\u1ed9t linh ki\u1ec7n \u0111i\u1ec7n t\u1eed th\u1ee5 \u0111\u1ed9ng, th\u01b0\u1eddng d\u00f9ng trong m\u1ea1ch \u0111i\u1ec7n c\u00f3 d\u00f2ng \u0111i\u1ec7n bi\u1ebfn \u0111\u1ed5i theo th\u1eddi gian (nh\u01b0 c\u00e1c m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u). L\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng \u1edf d\u1ea1ng t\u1eeb n\u0103ng (n\u0103ng l\u01b0\u1ee3ng c\u1ee7a t\u1eeb tr\u01b0\u1eddng t\u1ea1o ra b\u1edfi cu\u1ed9n c\u1ea3m khi d\u00f2ng \u0111i\u1ec7n \u0111i qua); v\u00e0 l\u00e0m d\u00f2ng \u0111i\u1ec7n b\u1ecb tr\u1ec5 pha so v\u1edbi \u0111i\u1ec7n \u00e1p m\u1ed9t g\u00f3c b\u1eb1ng 90\u00b0. Cu\u1ed9n c\u1ea3m \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1eb1ng \u0111\u1ed9 t\u1ef1 c\u1ea3m, \u0111o trong h\u1ec7 \u0111o l\u01b0\u1eddng qu\u1ed1c t\u1ebf theo \u0111\u01a1n v\u1ecb henri (H). Cu\u1ed9n c\u1ea3m c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m c\u00e0ng cao th\u00ec c\u00e0ng t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng m\u1ea1nh v\u00e0 d\u1ef1 tr\u1eef nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng.<\/span><\/p>\n

\"B\u1ea3ng
B\u1ea3ng \u0111\u1ed9 t\u1ef1 c\u1ea3m<\/figcaption><\/figure>\n

K\u00ed hi\u1ec7u c\u1ee7a cu\u1ed9n c\u1ea3m<\/span><\/p>\n

K\u00fd hi\u1ec7u cu\u1ed9n d\u00e2y tr\u00ean s\u01a1 \u0111\u1ed3 : L1 l\u00e0 cu\u1ed9n d\u00e2y l\u00f5i kh\u00f4ng kh\u00ed, L2 l\u00e0 cu\u1ed9n d\u00e2y l\u00f5i ferit, L3 l\u00e0 cu\u1ed9n d\u00e2y c\u00f3 l\u00f5i ch\u1ec9nh, L4 l\u00e0 cu\u1ed9n d\u00e2y l\u00f5i th\u00e9p k\u1ef9 thu\u1eadt<\/span><\/p>\n

2. C\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng c\u1ee7a cu\u1ed9n c\u1ea3m<\/strong><\/span><\/h2>\n

a) H\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m (\u0111\u1ecbnh lu\u1eadt Faraday)<\/strong><\/em>: H\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ee9c \u0111i\u1ec7n \u0111\u1ed9ng c\u1ea3m \u1ee9ng c\u1ee7a cu\u1ed9n d\u00e2y khi c\u00f3 d\u00f2ng \u0111i\u1ec7n bi\u1ebfn thi\u00ean ch\u1ea1y qua.<\/span><\/p>\n

L = ( \u00b5r.4.3,14.n2.S.10-7 ) \/ L<\/span><\/p>\n

L : l\u00e0 h\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m c\u1ee7a cu\u00f4n d\u00e2y, \u0111\u01a1n v\u1ecb l\u00e0 Henrry (H)<\/span><\/p>\n

n : l\u00e0 s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n d\u00e2y.<\/span><\/p>\n

L : l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a cu\u1ed9n d\u00e2y t\u00ednh b\u1eb1ng m\u00e9t (m)<\/span><\/p>\n

S : l\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a l\u00f5i, t\u00ednh b\u1eb1ng m2<\/span><\/p>\n

\u00b5r : l\u00e0 h\u1ec7 s\u1ed1 t\u1eeb th\u1ea9m c\u1ee7a v\u1eadt li\u1ec7u l\u00e0m l\u00f5i .<\/span><\/p>\n

b) C\u1ea3m kh\u00e1ng:<\/strong><\/em>\u00a0C\u1ea3m kh\u00e1ng c\u1ee7a cu\u1ed9n d\u00e2y l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a cu\u1ed9n d\u00e2y \u0111\u1ed1i v\u1edbi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u .<\/span><\/p>\n

ZL = 2.3,14.f.L<\/span><\/p>\n

Trong \u0111\u00f3 : ZL l\u00e0 c\u1ea3m kh\u00e1ng, \u0111\u01a1n v\u1ecb l\u00e0 \u2126<\/span><\/p>\n

f : l\u00e0 t\u1ea7n s\u1ed1 \u0111\u01a1n v\u1ecb l\u00e0 Hz<\/span><\/p>\n

L : l\u00e0 h\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m , \u0111\u01a1n v\u1ecb l\u00e0 Henr<\/span><\/p>\n

Th\u00ed nghi\u1ec7m v\u1ec1 c\u1ea3m kh\u00e1ng c\u1ee7a cu\u1ed9n d\u00e2y v\u1edbi d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u<\/span><\/p>\n

* Th\u00ed nghi\u1ec7m tr\u00ean minh ho\u1ea1 :<\/span><\/p>\n

Cu\u1ed9n d\u00e2y n\u1ed1i ti\u1ebfp v\u1edbi b\u00f3ng \u0111\u00e8n sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111\u1ea5u v\u00e0o c\u00e1c ngu\u1ed3n \u0111i\u1ec7n 12V nh\u01b0ng c\u00f3 t\u1ea7n s\u1ed1 kh\u00e1c nhau th\u00f4ng qua c\u00e1c c\u00f4ng t\u1eafc K1, K2 , K3 , khi K1 \u0111\u00f3ng d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u \u0111i qua cu\u1ed9n d\u00e2y m\u1ea1nh nh\u1ea5t ( V\u00ec ZL = 0 ) => do \u0111\u00f3 b\u00f3ng \u0111\u00e8n s\u00e1ng nh\u1ea5t, khi K2 \u0111\u00f3ng d\u00f2ng \u0111i\u1ec7n xoay ch\u1ec9\u1ec1u 50Hz \u0111i qua cu\u1ed9n d\u00e2y y\u1ebfu h\u01a1n ( do ZL t\u0103ng ) => b\u00f3ng \u0111\u00e8n s\u00e1ng y\u1ebfu \u0111i, khi K3 \u0111\u00f3ng , d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u 200Hz \u0111i qua cu\u1ed9n d\u00e2y y\u1ebfu nh\u1ea5t ( do ZL t\u0103ng cao nh\u1ea5t) => b\u00f3ng \u0111\u00e8n s\u00e1ng y\u1ebfu nh\u1ea5t.<\/span><\/p>\n

=> K\u1ebft lu\u1eadn : C\u1ea3m kh\u00e1ng c\u1ee7a cu\u1ed9n d\u00e2y t\u1ef7 l\u1ec7 v\u1edbi h\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 t\u1ef7 l\u1ec7 v\u1edbi t\u1ea7n s\u1ed1 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u, ngh\u0129a l\u00e0 d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 t\u1ea7n s\u1ed1 c\u00e0ng cao th\u00ec \u0111i qua cu\u1ed9n d\u00e2y c\u00e0ng kh\u00f3, d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u c\u00f3 t\u1ea7 n s\u1ed1 f = 0 Hz v\u00ec v\u1eady v\u1edbi d\u00f2ng m\u1ed9t chi\u1ec1u cu\u1ed9n d\u00e2y c\u00f3 c\u1ea3m kh\u00e1ng ZL = 0<\/span><\/p>\n

c) \u0110i\u1ec7n tr\u1edf thu\u1ea7n c\u1ee7a cu\u1ed9n d\u00e2y<\/em><\/strong><\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf thu\u1ea7n c\u1ee7a cu\u1ed9n d\u00e2y l\u00e0 \u0111i\u1ec7n tr\u1edf m\u00e0 ta c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng, th\u00f4ng th\u01b0\u1eddng cu\u1ed9n d\u00e2y c\u00f3 ph\u1ea9m ch\u1ea5t t\u1ed1t th\u00ec \u0111i\u1ec7n tr\u1edf thu\u1ea7n ph\u1ea3i t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf so v\u1edbi c\u1ea3m kh\u00e1ng, \u0111i\u1ec7n tr\u1edf thu\u1ea7n c\u00f2n g\u1ecdi l\u00e0 \u0111i\u1ec7n tr\u1edf t\u1ed5n hao v\u00ec ch\u00ednh \u0111i\u1ec7n tr\u1edf n\u00e0y sinh ra nhi\u1ec7t khi cu\u1ed9n d\u00e2y ho\u1ea1t \u0111\u1ed9ng.<\/span><\/p>\n

 <\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:<\/i><\/p>\n

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

1. Kh\u00e1i ni\u1ec7m Cu\u1ed9n c\u1ea3m l\u00e0 m\u1ed9t linh ki\u1ec7n \u0111i\u1ec7n t\u1eed th\u1ee5 \u0111\u1ed9ng, th\u01b0\u1eddng d\u00f9ng trong m\u1ea1ch \u0111i\u1ec7n c\u00f3 d\u00f2ng \u0111i\u1ec7n bi\u1ebfn \u0111\u1ed5i theo th\u1eddi gian (nh\u01b0 c\u00e1c m\u1ea1ch \u0111i\u1ec7n xoay chi\u1ec1u). L\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng \u1edf d\u1ea1ng t\u1eeb n\u0103ng (n\u0103ng l\u01b0\u1ee3ng c\u1ee7a t\u1eeb tr\u01b0\u1eddng t\u1ea1o ra b\u1edfi cu\u1ed9n c\u1ea3m khi d\u00f2ng \u0111i\u1ec7n \u0111i qua); […]\n","protected":false},"author":95,"featured_media":12180,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96,94],"tags":[672],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/2132"}],"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=2132"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/2132\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/12180"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}