{"id":2130,"date":"2018-07-09T02:34:31","date_gmt":"2018-07-09T02:34:31","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=2130"},"modified":"2025-03-11T14:57:40","modified_gmt":"2025-03-11T07:57:40","slug":"co-ban-ve-cuon-day","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=2130","title":{"rendered":"C\u01a1 b\u1ea3n v\u1ec1 cu\u1ed9n c\u1ea3m"},"content":{"rendered":"
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C\u01a1 b\u1ea3n v\u1ec1 cu\u1ed9n c\u1ea3m<\/figcaption><\/figure>\n

1 – Cu\u1ed9n c\u1ea3m<\/strong><\/span><\/h2>\n

1.1 – C\u1ea5u t\u1ea1o c\u1ee7a cu\u1ed9n c\u1ea3m.<\/strong><\/span><\/p>\n

 <\/p>\n

Cu\u1ed9n c\u1ea3m g\u1ed3m m\u1ed9t s\u1ed1 v\u00f2ng d\u00e2y qu\u1ea5n l\u1ea1i th\u00e0nh nhi\u1ec1u v\u00f2ng, d\u00e2y qu\u1ea5n \u0111\u01b0\u1ee3c s\u01a1n emay c\u00e1ch \u0111i\u1ec7n, l\u00f5i cu\u1ed9n d\u00e2y c\u00f3 th\u1ec3 l\u00e0 kh\u00f4ng kh\u00ed, ho\u1eb7c l\u00e0 v\u1eadt li\u1ec7u d\u1eabn t\u1eeb nh\u01b0 Ferrite hay l\u00f5i th\u00e9p k\u1ef9 thu\u1eadt.<\/span><\/p>\n

\u00a0\u00a0<\/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\u00a0 kh\u00f4ng kh\u00ed, L2 l\u00e0 cu\u1ed9n d\u00e2y l\u00f5i ferit, L3 l\u00e0 cu\u1ed9n\u00a0 d\u00e2y c\u00f3 l\u00f5i ch\u1ec9nh, L4 l\u00e0 cu\u1ed9n d\u00e2y l\u00f5i th\u00e9p k\u1ef9 thu\u1eadt.<\/em><\/span><\/p>\n

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

 <\/p>\n

a) H\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m (\u0111\u1ecbnh lu\u1eadt Faraday)<\/em><\/span><\/p>\n

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

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b) C\u1ea3m kh\u00e1ng<\/strong><\/em><\/span><\/p>\n

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C\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:\u00a0 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 Henry<\/span><\/p>\n

 <\/p>\n

* Th\u00ed nghi\u1ec7m tr\u00ean minh h\u1ecda:<\/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\u00a0 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\u1ebfy 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\u00a0 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\u00a0 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\u1ea7n s\u1ed1 f = 0 Hz v\u00ec\u00a0 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.<\/strong><\/em><\/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

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1.3 – T\u00ednh ch\u1ea5t n\u1ea1p, x\u1ea3 c\u1ee7a cu\u1ed9n c\u1ea3m<\/strong><\/span><\/p>\n

 <\/p>\n

* Cu\u1ed9n d\u00e2y n\u1ea1p n\u0103ng l\u01b0\u01a1ng: Khi cho m\u1ed9t d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n d\u00e2y, cu\u1ed9n d\u00e2y n\u1ea1p m\u1ed9t n\u0103ng l\u01b0\u1ee3ng d\u01b0\u1edbi d\u1ea1ng t\u1eeb tr\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c<\/span><\/p>\n

W = L.I 2 \/ 2<\/span><\/p>\n

W: n\u0103ng l\u01b0\u1ee3ng (June)<\/span><\/p>\n

L: H\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m (H)<\/span><\/p>\n

I: d\u00f2ng \u0111i\u1ec7n.<\/span><\/p>\n

 <\/p>\n

\u1ede th\u00ed nghi\u1ec7m tr\u00ean: Khi K1 \u0111\u00f3ng, d\u00f2ng \u0111i\u1ec7n qua cu\u1ed9n d\u00e2y t\u0103ng d\u1ea7n ( do cu\u1ed9n d\u00e2y sinh ra c\u1ea3m kh\u00e1ng ch\u1ed1ng l\u1ea1i d\u00f2ng \u0111i\u1ec7n t\u0103ng \u0111\u1ed9t ng\u1ed9t ) v\u00ec v\u1eady\u00a0 b\u00f3ng \u0111\u00e8n s\u00e1ng t\u1eeb t\u1eeb, khi K1 v\u1eeba ng\u1eaft v\u00e0 K2 \u0111\u00f3ng , n\u0103ng l\u01b0\u01a1ng n\u1ea1p trong cu\u1ed9n d\u00e2y t\u1ea1o th\u00e0nh \u0111i\u1ec7n \u00e1p c\u1ea3m \u1ee9ng ph\u00f3ng ng\u01b0\u1ee3c l\u1ea1i qua b\u00f3ng \u0111\u00e8n l\u00e0m b\u00f3ng \u0111\u00e8n lo\u00e9 s\u00e1ng => \u0111\u00f3 l\u00e0 hi\u00ean t\u01b0\u1ee3ng cu\u1ed9n d\u00e2y x\u1ea3 \u0111i\u1ec7n.<\/span><\/p>\n

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2 – Loa v\u00e0 Micro<\/strong><\/span><\/h2>\n

 <\/p>\n

2.1 – Loa\u00a0 (Speaker)<\/strong><\/span><\/p>\n

 <\/p>\n

Loa l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 t\u1eeb tr\u01b0\u1eddng.<\/span><\/p>\n

 <\/p>\n

C\u1ea5u t\u1ea1o c\u1ee7a loa:<\/em><\/strong><\/span><\/p>\n

Loa g\u1ed3m m\u1ed9t nam ch\u00e2m h\u00ecnh tr\u1ee5 c\u00f3 hai c\u1ef1c l\u1ed3ng v\u00e0o nhau, c\u1ef1c N \u1edf gi\u1eefa v\u00e0 c\u1ef1c S \u1edf xung quanh, gi\u1eefa hai c\u1ef1c t\u1ea1o th\u00e0nh m\u1ed9t khe t\u1eeb c\u00f3 t\u1eeb tr\u01b0\u1eddng kh\u00e1 m\u1ea1nh, m\u1ed9t cu\u00f4n d\u00e2y \u0111\u01b0\u1ee3c g\u1eafn v\u1edbi m\u00e0ng loa v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1eb7t trong khe t\u1eeb, m\u00e0ng loa \u0111\u01b0\u1ee3c \u0111\u1ee1 b\u1eb1ng g\u00e2n cao su m\u1ec1m gi\u00fap cho m\u00e0ng loa c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng dao \u0111\u1ed9ng ra v\u00e0o.<\/span><\/p>\n

Ho\u1ea1t \u0111\u1ed9ng: Khi ta cho d\u00f2ng \u0111i\u1ec7n \u00e2m t\u1ea7n (\u0111i\u1ec7n xoay chi\u1ec1u t\u1eeb 20 Hz => 20.000Hz) ch\u1ea1y qua cu\u1ed9n d\u00e2y, cu\u1ed9n d\u00e2y t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng bi\u1ebfn thi\u00ean v\u00e0 b\u1ecb t\u1eeb tr\u01b0\u1eddng c\u1ed1 \u0111\u1ecbnh c\u1ee7a nam ch\u00e2m \u0111\u1ea9y ra, \u0111\u1ea9y\u00a0 v\u00e0o l\u00e0m cu\u1ed9n d\u00e2y dao \u0111\u1ed9ng => m\u00e0ng loa dao \u0111\u1ed9ng theo v\u00e0 ph\u00e1t ra \u00e2m thanh.<\/span><\/p>\n

Ch\u00fa \u00fd: Tuy\u1ec7t \u0111\u1ed1i ta kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u01b0a d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u v\u00e0o loa , v\u00ec d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ch\u1ec9 t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng c\u1ed1 \u0111\u1ecbnh v\u00e0 cu\u1ed9n d\u00e2y c\u1ee7a loa ch\u1ec9 l\u1ec7ch v\u1ec1 m\u1ed9t h\u01b0\u1edbng r\u1ed3i d\u1eebng l\u1ea1i, khi \u0111\u00f3 d\u00f2ng m\u1ed9t chi\u1ec1u qua cu\u1ed9n d\u00e2y t\u0103ng m\u1ea1nh (do kh\u00f4ng c\u00f3 \u0111i\u1ec7n \u00e1p c\u1ea3m \u1ee9ng theo chi\u1ec1u ng\u01b0\u1ee3c lai ) v\u00ec v\u1eady cu\u1ed9n d\u00e2y s\u1ebd b\u1ecb ch\u00e1y.<\/span><\/p>\n

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2.2 – Micro<\/strong><\/span><\/p>\n

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Th\u1ef1c ch\u1ea5t c\u1ea5u t\u1ea1o Micro l\u00e0 m\u1ed9t chi\u1ebfc loa thu nh\u1ecf, v\u1ec1 c\u1ea5u t\u1ea1o Micro gi\u1ed1ng loa nh\u01b0ng Micro c\u00f3 s\u1ed1 v\u00f2ng qu\u1ea5n tr\u00ean cu\u1ed9n d\u00e2y l\u1edbn h\u01a1n loa r\u1ea5t nhi\u1ec1u v\u00ec v\u1eady tr\u1edf kh\u00e1ng c\u1ee7a cu\u1ed9n d\u00e2y micro l\u00e0 r\u1ea5t l\u1edbn kho\u1ea3ng 600\u2126 (tr\u1edf kh\u00e1ng loa t\u1eeb 4\u2126 – 16\u2126) ngo\u00e0i ra m\u00e0ng micro c\u0169ng \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o r\u1ea5t m\u1ecfng \u0111\u1ec3 d\u1ec5 d\u00e0ng dao \u0111\u1ed9ng khi c\u00f3 \u00e2m thanh t\u00e1c \u0111\u1ed9ng v\u00e0o.<\/span><\/p>\n

Loa l\u00e0 thi\u1ebft b\u1ecb \u0111\u1ec3 chuy\u1ec3n d\u00f2ng \u0111i\u1ec7n th\u00e0nh \u00e2m thanh c\u00f2n micro th\u00ec ng\u01b0\u1ee3c l\u1ea1i, Micro \u0111\u1ed5i \u00e2m thanh th\u00e0nh d\u00f2ng \u0111i\u1ec7n \u00e2m t\u1ea7n.<\/span><\/p>\n

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2.3 – R\u01a1 le (Relay)<\/strong><\/span><\/p>\n

 <\/p>\n

R\u01a1 le c\u0169ng l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee7a cu\u1ed9n d\u00e2y trong s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a R\u01a1le l\u00e0 bi\u1ebfn \u0111\u1ed5i d\u00f2ng \u0111i\u1ec7n th\u00e0nh t\u1eeb tr\u01b0\u1eddng th\u00f4ng qua qu\u1ed9n d\u00e2y, t\u1eeb tr\u01b0\u1eddng l\u1ea1i t\u1ea1o th\u00e0nh l\u1ef1c c\u01a1 h\u1ecdc th\u00f4ng qua l\u1ef1c h\u00fat \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t \u0111\u1ed9ng t\u00e1c v\u1ec1 c\u01a1 kh\u00ed nh\u01b0 \u0111\u00f3ng m\u1edf c\u00f4ng t\u1eafc, \u0111\u00f3ng m\u1edf c\u00e1c h\u00e0nh tr\u00ecnh c\u1ee7a m\u1ed9t thi\u1ebft b\u1ecb t\u1ef1 \u0111\u1ed9ng vv…<\/span><\/p>\n

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3 – Bi\u1ebfn \u00e1p<\/strong><\/span><\/h2>\n

 <\/p>\n

3.1 – C\u1ea5u t\u1ea1o c\u1ee7a bi\u1ebfn \u00e1p.<\/strong><\/span><\/p>\n

 <\/p>\n

Bi\u1ebfn \u00e1p l\u00e0 thi\u1ebft b\u1ecb \u0111\u1ec3 bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u, c\u1ea5u t\u1ea1o bao g\u1ed3m m\u1ed9t cu\u1ed9n s\u01a1 c\u1ea5p (\u0111\u01b0a \u0111i\u1ec7n \u00e1p v\u00e0o) v\u00e0 m\u1ed9t hay nhi\u1ec1u cu\u1ed9n th\u1ee9 c\u1ea5p ( \u1ea5y \u0111i\u1ec7n \u00e1p ra s\u1eed d\u1ee5ng) c\u00f9ng qu\u1ea5n tr\u00ean m\u1ed9t l\u00f5i t\u1eeb c\u00f3 th\u1ec3 l\u00e0 l\u00e1 th\u00e9p ho\u1eb7c l\u00f5i ferit.<\/span><\/p>\n

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3.2 – T\u1ef7 s\u1ed1 v\u00f2ng \/ vol c\u1ee7a bi\u00e9n \u00e1p.<\/strong><\/span><\/p>\n

 <\/p>\n

G\u1ecdi n1v\u00e0 n2 l\u00e0 s\u1ed1 v\u00f2ng c\u1ee7a qu\u1ed9n s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p.<\/span><\/p>\n

U1 v\u00e0 I1 l\u00e0 \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111i v\u00e0o cu\u1ed9n s\u01a1 c\u1ea5p<\/span><\/p>\n

U2 v\u00e0 I2 l\u00e0 \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111i ra t\u1eeb cu\u1ed9n th\u1ee9 c\u1ea5p.<\/span><\/p>\n

Ta c\u00f3 c\u00e1c h\u1ec7 th\u1ee9c nh\u01b0 sau:<\/span><\/p>\n

U1 \/ U2 = n1 \/ n2 \u0110i\u1ec7n \u00e1p \u1edf tr\u00ean hai cu\u1ed9n d\u00e2y s\u01a1 c\u1ea5p v\u00e0 th\u1ee9 c\u1ea5p t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi s\u1ed1 v\u00f2ng d\u00e2y qu\u1ea5n.<\/span><\/p>\n

U1 \/ U2 = I2 \/ I1<\/span><\/p>\n

D\u00f2ng \u0111i\u1ec7n \u1edf tr\u00ean hai \u0111\u1ea7u cu\u1ed9n d\u00e2y t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi \u0111i\u1ec7n \u00e1p, ngh\u0129a l\u00e0 n\u1ebfu ta l\u1ea5y ra \u0111i\u1ec7n \u00e1p c\u00e0ng cao th\u00ec cho d\u00f2ng c\u00e0ng nh\u1ecf.<\/span><\/p>\n

 <\/p>\n

3. 3 – C\u00f4ng xu\u1ea5t c\u1ee7a bi\u1ebfn \u00e1p.<\/strong><\/span><\/p>\n

 <\/p>\n

C\u00f4ng xu\u1ea5t c\u1ee7a bi\u1ebfn \u00e1p ph\u1ee5 thu\u1ed9c ti\u1ebft di\u1ec7n c\u1ee7a l\u00f5i t\u1eeb, v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 c\u1ee7a d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u, bi\u1ebfn \u00e1p ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 c\u00e0ng cao th\u00ec cho c\u00f4ng xu\u1ea5t c\u00e0ng l\u1edbn.<\/span><\/p>\n

 <\/p>\n

3.4 – Ph\u00e2n lo\u1ea1i bi\u1ebfn \u00e1p.<\/strong><\/span><\/p>\n

 <\/p>\n

* Bi\u1ebfn \u00e1p ngu\u1ed3n v\u00e0 bi\u1ebfn \u00e1p \u00e2m t\u1ea7n:<\/span><\/p>\n

 <\/p>\n

Bi\u1ebfn \u00e1p ngu\u1ed3n th\u01b0\u1eddng g\u1eb7p trong Cassete, \u00c2mply\u2026, bi\u1ebfn \u00e1p n\u00e0y ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 \u0111i\u1ec7n l\u01b0\u1edbi 50Hz, l\u00f5i bi\u1ebfn \u00e1p s\u1eed d\u1ee5ng c\u00e1c l\u00e1\u00a0 T\u00f4nsilic h\u00ecnh ch\u1eef E v\u00e0 I gh\u00e9p l\u1ea1i, bi\u1ebfn \u00e1p n\u00e0y c\u00f3 t\u1ef7 s\u1ed1 v\u00f2ng \/vol l\u1edbn.<\/span><\/p>\n

Bi\u1ebfn \u00e1p \u00e2m t\u1ea7n s\u1eed d\u1ee5ng l\u00e0m bi\u1ebfn \u00e1p \u0111\u1ea3o pha v\u00e0 bi\u1ebfn \u00e1p ra loa trong c\u00e1c m\u1ea1ch khuy\u1ebfch \u0111\u1ea1i c\u00f4ng xu\u1ea5t \u00e2m t\u1ea7n,bi\u1ebfn \u00e1p c\u0169ng s\u1eed d\u1ee5ng l\u00e1 T\u00f4nsilic l\u00e0m l\u00f5i t\u1eeb nh\u01b0 bi\u1ebfn \u00e1p ngu\u1ed3n, nh\u01b0ng l\u00e1 t\u00f4nsilic trong bi\u1ebfn \u00e1p \u00e2m t\u1ea7n m\u1ecfng h\u01a1n \u0111\u1ec3 tr\u00e1nh t\u1ed5n hao, bi\u1ebfn \u00e1p \u00e2m t\u1ea7n ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 cao h\u01a1n , v\u00ec v\u1eady c\u00f3 s\u1ed1 v\u00f2ng vol th\u1ea5p h\u01a1n, khi thi\u1ebft k\u1ebf bi\u1ebfn \u00e1p \u00e2m t\u1ea7n ng\u01b0\u1eddi ta th\u01b0\u1eddng l\u1ea5y gi\u00e1 tr\u1ecb t\u1ea7n s\u1ed1 trung b\u00ecnh kho\u1ea3ng 1KHz – \u0111\u1ebfn 3KHz.<\/span><\/p>\n

 <\/p>\n

* Bi\u1ebfn \u00e1p xung & Cao \u00e1p.<\/span><\/p>\n

 <\/p>\n

Bi\u1ebfn \u00e1p xung l\u00e0 bi\u1ebfn \u00e1p ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 cao kho\u1ea3ng v\u00e0i ch\u1ee5c KHz nh\u01b0 bi\u1ebfn \u00e1p trong c\u00e1c b\u1ed9 ngu\u1ed3n xung , bi\u1ebfn \u00e1p cao \u00e1p . l\u00f5i bi\u1ebfn \u00e1p xung l\u00e0m b\u1eb1ng ferit , do ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 cao n\u00ean bi\u1ebfn \u00e1p xung cho c\u00f4ng xu\u1ea5t r\u1ea5t m\u1ea1nh, so v\u1edbi bi\u1ebfn \u00e1p ngu\u1ed3n th\u00f4ng th\u01b0\u1eddng c\u00f3 c\u00f9ng tr\u1ecdng l\u01b0\u1ee3ng th\u00ec bi\u1ebfn \u00e1p xung c\u00f3 th\u1ec3 cho c\u00f4ng xu\u1ea5t m\u1ea1nh g\u1ea5p h\u00e0ng ch\u1ee5c l\u1ea7n.<\/span><\/p>\n

 <\/p>\n

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

C\u00d4NG TY C\u1ed4 PH\u1ea6N H\u1eccC VI\u1ec6N IT<\/strong>
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Th\u00e1i Nguy\u00ean:<\/strong>\u00a0S\u1ed1 297 L\u01b0\u01a1ng Ng\u1ecdc Quy\u1ebfn, TP. Th\u00e1i Nguy\u00ean
\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":"

Cu\u1ed9n c\u1ea3m g\u1ed3m m\u1ed9t s\u1ed1 v\u00f2ng d\u00e2y qu\u1ea5n l\u1ea1i th\u00e0nh nhi\u1ec1u v\u00f2ng, d\u00e2y qu\u1ea5n \u0111\u01b0\u1ee3c s\u01a1n emay c\u00e1ch \u0111i\u1ec7n, l\u00f5i cu\u1ed9n d\u00e2y c\u00f3 th\u1ec3 l\u00e0 kh\u00f4ng kh\u00ed, ho\u1eb7c l\u00e0 v\u1eadt li\u1ec7u d\u1eabn t\u1eeb nh\u01b0 Ferrite hay l\u00f5i th\u00e9p k\u1ef9 thu\u1eadt.<\/p>\n","protected":false},"author":95,"featured_media":12285,"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\/2130"}],"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=2130"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/2130\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/12285"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}