{"id":2509,"date":"2026-09-02T01:26:03","date_gmt":"2026-09-01T18:26:03","guid":{"rendered":"https:\/\/yourapx.com\/?p=2509"},"modified":"2026-09-02T01:26:03","modified_gmt":"2026-09-01T18:26:03","slug":"dien-tro-shunt-do-dong-2","status":"publish","type":"post","link":"https:\/\/yourapx.com\/?p=2509","title":{"rendered":"\u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng l\u00e0 g\u00ec? K\u00fd hi\u1ec7u, c\u00e1ch m\u1eafc, c\u00e1ch \u0111o v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"

1. \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng l\u00e0 g\u00ec v\u00e0 c\u00f3 vai tr\u00f2 g\u00ec?<\/h2>\n

\u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng l\u00e0 \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb r\u1ea5t th\u1ea5p, t\u1ea1o ra m\u1ed9t \u0111i\u1ec7n \u00e1p r\u01a1i nh\u1ecf t\u1ef7 l\u1ec7 v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 m\u1ea1ch \u0111o ho\u1eb7c b\u1ea3o v\u1ec7 t\u00ednh \u0111\u01b0\u1ee3c d\u00f2ng t\u1ea3i.<\/p>\n

Ph\u1ea7n quan tr\u1ecdng nh\u1ea5t l\u00e0 x\u00e1c \u0111\u1ecbnh linh ki\u1ec7n n\u00e0y \u0111ang l\u00e0m nhi\u1ec7m v\u1ee5 g\u00ec trong kh\u1ed1i m\u1ea1ch tr\u01b0\u1edbc khi \u0111o ho\u1eb7c ch\u1ecdn linh ki\u1ec7n thay th\u1ebf.<\/p>\n

2. K\u00fd hi\u1ec7u \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng trong s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n<\/h2>\n

Tr\u00ean s\u01a1 \u0111\u1ed3, \u0111i\u1ec7n tr\u1edf shunt v\u1eabn mang k\u00fd hi\u1ec7u \u0111i\u1ec7n tr\u1edf v\u00e0 m\u00e3 tham chi\u1ebfu R ho\u1eb7c RS. Lo\u1ea1i \u0111o ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 d\u00f9ng b\u1ed1n \u0111\u1ea7u Kelvin: hai \u0111\u1ea7u mang d\u00f2ng v\u00e0 hai \u0111\u1ea7u l\u1ea5y \u00e1p.<\/p>\n

Tr\u00ean s\u01a1 \u0111\u1ed3, \u0111i\u1ec7n tr\u1edf th\u01b0\u1eddng mang m\u00e3 R; khi c\u00f3 nhi\u1ec1u \u0111i\u1ec7n tr\u1edf, ch\u00fang \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 R1, R2, R3\u2026<\/p>\n

\"K\u00fd
K\u00fd hi\u1ec7u v\u00e0 quy \u01b0\u1edbc ch\u00e2n c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng trong s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n<\/figcaption><\/figure>\n

3. C\u1ea5u t\u1ea1o, h\u00ecnh d\u1ea1ng v\u00e0 ki\u1ec3u \u0111\u00f3ng g\u00f3i<\/h2>\n

Ph\u1ea7n t\u1eed \u0111i\u1ec7n tr\u1edf th\u01b0\u1eddng l\u00e0 h\u1ee3p kim c\u00f3 h\u1ec7 s\u1ed1 nhi\u1ec7t th\u1ea5p, \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u \u0111\u1ec3 ch\u1ecbu d\u00f2ng l\u1edbn v\u00e0 gi\u1eef tr\u1ecb s\u1ed1 \u1ed5n \u0111\u1ecbnh. \u0110i\u1ec7n tr\u1edf \u0111\u01b0\u1eddng m\u1ea1ch v\u00e0 m\u1ed1i h\u00e0n c\u00f3 th\u1ec3 g\u00e2y sai s\u1ed1 \u0111\u00e1ng k\u1ec3 v\u00ec tr\u1ecb s\u1ed1 shunt r\u1ea5t nh\u1ecf.<\/p>\n

Nh\u1eefng ki\u1ec3u v\u1ecf v\u00e0 ki\u1ec3u l\u1eafp th\u01b0\u1eddng g\u1eb7p g\u1ed3m:<\/p>\n

    \n
  • \u0110i\u1ec7n tr\u1edf kim lo\u1ea1i d\u1ea1ng thanh ho\u1eb7c l\u00e1<\/li>\n
  • SMD metal-element 2512, 3920 ho\u1eb7c package chuy\u00ean d\u1ee5ng<\/li>\n
  • Shunt b\u1eaft v\u00edt c\u00f4ng su\u1ea5t l\u1edbn<\/li>\n
  • Shunt b\u1ed1n \u0111\u1ea7u Kelvin<\/li>\n<\/ul>\n
    \"\u0110i\u1ec7n
    \u1ea2nh th\u1ef1c t\u1ebf 1 c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng d\u00f9ng \u0111\u1ec3 nh\u1eadn bi\u1ebft h\u00ecnh d\u1ea1ng t\u1ed5ng th\u1ec3.<\/figcaption><\/figure>\n

    4. C\u00e1c ch\u1ee7ng lo\u1ea1i ph\u1ed5 bi\u1ebfn<\/h2>\n

    M\u1ed7i ch\u1ee7ng lo\u1ea1i c\u00f3 \u01b0u \u0111i\u1ec3m, gi\u1edbi h\u1ea1n v\u00e0 m\u00f4i tr\u01b0\u1eddng s\u1eed d\u1ee5ng kh\u00e1c nhau; kh\u00f4ng n\u00ean thay l\u1eabn ch\u1ec9 v\u00ec c\u00f3 h\u00ecnh d\u1ea1ng g\u1ea7n gi\u1ed1ng.<\/p>\n

      \n
    • Shunt hai \u0111\u1ea7u<\/li>\n
    • Shunt b\u1ed1n \u0111\u1ea7u Kelvin<\/li>\n
    • Shunt SMD<\/li>\n
    • Shunt c\u00f4ng su\u1ea5t b\u1eaft v\u00edt<\/li>\n<\/ul>\n
      \"\u0110i\u1ec7n
      \u1ea2nh th\u1ef1c t\u1ebf 2 c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

      5. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7n hi\u1ec3u<\/h2>\n
        \n
      • \u0110i\u1ec7n tr\u1edf danh \u0111\u1ecbnh v\u00e0 dung sai:<\/strong> cho bi\u1ebft tr\u1ecb s\u1ed1 th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c ph\u00e9p l\u1ec7ch bao nhi\u00eau so v\u1edbi tr\u1ecb s\u1ed1 danh \u0111\u1ecbnh.<\/li>\n
      • C\u00f4ng su\u1ea5t li\u00ean t\u1ee5c v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu xung:<\/strong> x\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3ng nhi\u1ec7t linh ki\u1ec7n c\u00f3 th\u1ec3 ch\u1ecbu trong \u0111i\u1ec1u ki\u1ec7n quy \u0111\u1ecbnh m\u00e0 kh\u00f4ng b\u1ecb qu\u00e1 nhi\u1ec7t.<\/li>\n
      • TCR:<\/strong> cho bi\u1ebft tr\u1ecb s\u1ed1 thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9; th\u00f4ng s\u1ed1 n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong m\u1ea1ch \u0111o v\u00e0 m\u1ea1ch ch\u00ednh x\u00e1c.<\/li>\n
      • D\u00f2ng l\u00e0m vi\u1ec7c:<\/strong> l\u00e0 d\u00f2ng \u0111i\u1ec7n linh ki\u1ec7n c\u00f3 th\u1ec3 mang ho\u1eb7c \u0111i\u1ec1u khi\u1ec3n trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u00e3 n\u00eau.<\/li>\n
      • Ki\u1ec3u l\u1ea5y m\u1eabu hai d\u00e2y ho\u1eb7c Kelvin:<\/strong> c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1ecdc c\u00f9ng \u0111\u01a1n v\u1ecb, \u0111i\u1ec1u ki\u1ec7n \u0111o v\u00e0 gi\u1edbi h\u1ea1n do nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1.<\/li>\n<\/ul>\n
        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 3 c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        6. C\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc v\u00e0 v\u1eadt l\u00fd<\/h2>\n

        C\u00e1c c\u00f4ng th\u1ee9c d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 quan h\u1ec7 gi\u1eefa nh\u1eefng \u0111\u1ea1i l\u01b0\u1ee3ng quan tr\u1ecdng c\u1ee7a linh ki\u1ec7n. U l\u00e0 \u0111i\u1ec7n \u00e1p, I l\u00e0 d\u00f2ng \u0111i\u1ec7n, R l\u00e0 \u0111i\u1ec7n tr\u1edf, P l\u00e0 c\u00f4ng su\u1ea5t, E ho\u1eb7c W l\u00e0 n\u0103ng l\u01b0\u1ee3ng, f l\u00e0 t\u1ea7n s\u1ed1 v\u00e0 t l\u00e0 th\u1eddi gian; \u0111\u01a1n v\u1ecb l\u1ea7n l\u01b0\u1ee3t l\u00e0 V, A, \u03a9, W, J, Hz v\u00e0 s.<\/p>\n

        \n
        C\u00f4ng th\u1ee9c 1<\/figcaption>
        I = Ushunt<\/sub><\/span>Rshunt<\/sub><\/span><\/span><\/div>\n<\/figure>\n
        C\u00f4ng th\u1ee9c 2<\/figcaption>
        Ushunt<\/sub> = I \u00d7 Rshunt<\/sub><\/div>\n<\/figure>\n
        C\u00f4ng th\u1ee9c 3<\/figcaption>
        P = I2<\/sup> \u00d7 Rshunt<\/sub><\/div>\n<\/figure>\n<\/div>\n

        K\u00fd hi\u1ec7u c\u00f3 ch\u1ec9 s\u1ed1 d\u01b0\u1edbi d\u00f9ng \u0111\u1ec3 ch\u1ec9 \u0111\u00fang v\u1ecb tr\u00ed ho\u1eb7c tr\u1ea1ng th\u00e1i \u0111o, ch\u1eb3ng h\u1ea1n Ura<\/sub> l\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra v\u00e0 Ushunt<\/sub> l\u00e0 \u0111i\u1ec7n \u00e1p tr\u00ean \u0111i\u1ec7n tr\u1edf shunt. V\u1edbi k\u00fd hi\u1ec7u ri\u00eang c\u1ee7a t\u1eebng h\u1ecd linh ki\u1ec7n, c\u1ea7n \u0111\u1ecdc \u0111\u1ecbnh ngh\u0129a ngay trong datasheet.<\/p>\n

        C\u00f4ng th\u1ee9c l\u00fd t\u01b0\u1edfng ch\u1ec9 \u0111\u00fang trong \u0111i\u1ec1u ki\u1ec7n \u0111\u00e3 n\u00eau. Khi ch\u1ecdn linh ki\u1ec7n th\u1eadt ph\u1ea3i t\u00ednh th\u00eam dung sai, nhi\u1ec7t \u0111\u1ed9, t\u1ea7n s\u1ed1, t\u1ea3i v\u00e0 gi\u1edbi h\u1ea1n trong datasheet.<\/p>\n

        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 4 c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        7. C\u00e1c c\u00e1ch m\u1eafc \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng trong m\u1ea1ch \u0111i\u1ec7n t\u1eed<\/h2>\n

        C\u00e1c c\u00e1ch m\u1eafc \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp t\u1eeb d\u1ec5 nh\u1eadn bi\u1ebft \u0111\u1ebfn \u1ee9ng d\u1ee5ng n\u00e2ng cao. \u1ede m\u1ed7i s\u01a1 \u0111\u1ed3, h\u00e3y theo d\u00f5i \u0111i\u1ec3m n\u1ed1i ngu\u1ed3n, mass, \u0111\u1ea7u v\u00e0o, \u0111\u1ea7u ra v\u00e0 chi\u1ec1u d\u00f2ng \u0111i\u1ec7n tr\u01b0\u1edbc khi t\u00ednh to\u00e1n.<\/p>\n

        \n
        \n

        M\u1ee9c c\u01a1 b\u1ea3n: nh\u1eadn bi\u1ebft \u0111\u01b0\u1eddng d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p<\/h3>\n

        1. \u0110o d\u00f2ng ph\u00eda th\u1ea5p (low-side)<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> Shunt m\u1eafc n\u1ed1i ti\u1ebfp gi\u1eefa t\u1ea3i v\u00e0 mass; d\u1ec5 \u0111o nh\u01b0ng t\u1ea1o ch\u00eanh l\u1ec7ch mass nh\u1ecf.<\/p>\n

        \n
        C\u00f4ng th\u1ee9c 1<\/figcaption>
        I = Ushunt<\/sub><\/span>Rshunt<\/sub><\/span><\/span><\/div>\n<\/figure>\n<\/div>\n
        \"S\u01a1
        S\u01a1 \u0111\u1ed3 c\u00e1ch m\u1eafc 1: \u0110o d\u00f2ng ph\u00eda th\u1ea5p (low-side) \u2013 Shunt m\u1eafc n\u1ed1i ti\u1ebfp gi\u1eefa t\u1ea3i v\u00e0 mass; d\u1ec5 \u0111o nh\u01b0ng t\u1ea1o ch\u00eanh l\u1ec7ch mass nh\u1ecf.<\/figcaption><\/figure>\n

        2. \u0110o d\u00f2ng ph\u00eda cao (high-side)<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> Shunt m\u1eafc n\u1ed1i ti\u1ebfp gi\u1eefa ngu\u1ed3n v\u00e0 t\u1ea3i; c\u1ea7n m\u1ea1ch khu\u1ebfch \u0111\u1ea1i \u0111o d\u00f2ng c\u00f3 d\u1ea3i common-mode ph\u00f9 h\u1ee3p.<\/p>\n

        \"S\u01a1
        S\u01a1 \u0111\u1ed3 c\u00e1ch m\u1eafc 2: \u0110o d\u00f2ng ph\u00eda cao (high-side) \u2013 Shunt m\u1eafc n\u1ed1i ti\u1ebfp gi\u1eefa ngu\u1ed3n v\u00e0 t\u1ea3i; c\u1ea7n m\u1ea1ch khu\u1ebfch \u0111\u1ea1i \u0111o d\u00f2ng c\u00f3 d\u1ea3i common-mode ph\u00f9 h\u1ee3p.<\/figcaption><\/figure>\n

        3. M\u1eafc Kelvin b\u1ed1n d\u00e2y<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> Hai \u0111\u01b0\u1eddng r\u1ed9ng mang d\u00f2ng t\u1ea3i, hai \u0111\u01b0\u1eddng ri\u00eang l\u1ea5y \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp t\u1ea1i hai \u0111\u1ea7u ph\u1ea7n t\u1eed \u0111i\u1ec7n tr\u1edf \u0111\u1ec3 gi\u1ea3m sai s\u1ed1 do \u0111\u01b0\u1eddng m\u1ea1ch v\u00e0 m\u1ed1i h\u00e0n.<\/p>\n

        \"S\u01a1
        S\u01a1 \u0111\u1ed3 c\u00e1ch m\u1eafc 3: M\u1eafc Kelvin b\u1ed1n d\u00e2y \u2013 Hai \u0111\u01b0\u1eddng r\u1ed9ng mang d\u00f2ng t\u1ea3i, hai \u0111\u01b0\u1eddng ri\u00eang l\u1ea5y \u0111i\u1ec7n \u00e1p tr\u1ef1c ti\u1ebfp t\u1ea1i hai \u0111\u1ea7u ph\u1ea7n t\u1eed \u0111i\u1ec7n tr\u1edf \u0111\u1ec3 gi\u1ea3m sai s\u1ed1 do \u0111\u01b0\u1eddng m\u1ea1ch v\u00e0 m\u1ed1i h\u00e0n.<\/figcaption><\/figure>\n<\/section>\n
        \n

        M\u1ee9c th\u1ef1c h\u00e0nh: \u1ee9ng d\u1ee5ng trong c\u00e1c kh\u1ed1i m\u1ea1ch<\/h3>\n

        4. \u0110o d\u00f2ng hai chi\u1ec1u<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> \u0110i\u1ec7n \u00e1p hai \u0111\u1ea7u shunt \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ed9 khu\u1ebfch \u0111\u1ea1i hai chi\u1ec1u; d\u1ea5u c\u1ee7a \u0111i\u1ec7n \u00e1p cho bi\u1ebft chi\u1ec1u d\u00f2ng.<\/p>\n

        5. Shunt song song v\u1edbi c\u01a1 c\u1ea5u \u0111o<\/h4>\n

        Nguy\u00ean l\u00fd:<\/strong> D\u00f9ng trong ampe k\u1ebf \u0111\u1ec3 ph\u1ea7n l\u1edbn d\u00f2ng \u0111i qua shunt, ch\u1ec9 m\u1ed9t ph\u1ea7n nh\u1ecf \u0111i qua c\u01a1 c\u1ea5u \u0111o; t\u1ef7 l\u1ec7 ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh v\u00e0 hi\u1ec7u chu\u1ea9n.<\/p>\n<\/section>\n<\/div>\n

        8. V\u00ed d\u1ee5 t\u00ednh to\u00e1n v\u00e0 \u1ee9ng d\u1ee5ng<\/h2>\n

        V\u1edbi shunt 0,01 \u03a9 v\u00e0 \u0111i\u1ec7n \u00e1p \u0111o \u0111\u01b0\u1ee3c 50 mV, d\u00f2ng t\u1ea3i I = 0,05\/0,01 = 5 A; c\u00f4ng su\u1ea5t tr\u00ean shunt l\u00e0 0,25 W. C\u1ea7n ch\u1ecdn c\u00f4ng su\u1ea5t c\u00f3 h\u1ec7 s\u1ed1 d\u1ef1 ph\u00f2ng v\u00e0 ki\u1ec3m tra nhi\u1ec7t \u0111\u1ed9 th\u1ef1c t\u1ebf.<\/p>\n

        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 5 c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        9. C\u00e1ch \u0111\u1ecdc m\u00e3 v\u00e0 datasheet<\/h2>\n

        \u0110\u1ecdc tr\u1ecb s\u1ed1, dung sai, TCR, c\u00f4ng su\u1ea5t t\u1ea1i nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu, \u0111\u01b0\u1eddng cong derating, kh\u1ea3 n\u0103ng ch\u1ecbu xung v\u00e0 khuy\u1ebfn ngh\u1ecb b\u1ed1 tr\u00ed pad\/Kelvin.<\/p>\n

        H\u00e3y ph\u00e2n bi\u1ec7t th\u00f4ng s\u1ed1 l\u00e0m vi\u1ec7c khuy\u1ebfn ngh\u1ecb v\u1edbi gi\u1edbi h\u1ea1n tuy\u1ec7t \u0111\u1ed1i. Gi\u1edbi h\u1ea1n tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ee9c n\u00ean duy tr\u00ec trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/p>\n

        \"\u0110i\u1ec7n
        \u1ea2nh th\u1ef1c t\u1ebf 6 c\u1ee7a \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng d\u00f9ng \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft tr\u00ean linh ki\u1ec7n ho\u1eb7c bo m\u1ea1ch.<\/figcaption><\/figure>\n

        10. C\u00e1ch \u0111o v\u00e0 ki\u1ec3m tra tr\u00ean bo m\u1ea1ch<\/h2>\n
          \n
        1. Ng\u1eaft ngu\u1ed3n r\u1ed3i \u0111o th\u00f4ng m\u1ea1ch \u0111\u1ec3 ph\u00e1t hi\u1ec7n \u0111\u1ee9t<\/li>\n
        2. Kh\u00f4ng d\u00f9ng thang ohm th\u00f4ng th\u01b0\u1eddng \u0111\u1ec3 k\u1ebft lu\u1eadn tr\u1ecb s\u1ed1 milliohm; \u01b0u ti\u00ean ph\u00e9p \u0111o b\u1ed1n d\u00e2y<\/li>\n
        3. Khi c\u1ea5p t\u1ea3i, \u0111o \u0111i\u1ec7n \u00e1p r\u01a1i b\u1eb1ng \u0111\u1ea7u d\u00f2 vi sai ho\u1eb7c \u0111\u1ed3ng h\u1ed3 ph\u00f9 h\u1ee3p v\u00e0 t\u00ednh d\u00f2ng theo \u0111\u1ecbnh lu\u1eadt Ohm<\/li>\n<\/ol>\n

          Khi \u0111o tr\u1ef1c ti\u1ebfp tr\u00ean bo, c\u00e1c linh ki\u1ec7n n\u1ed1i v\u1edbi c\u00f9ng n\u00fat m\u1ea1ch c\u00f3 th\u1ec3 l\u00e0m k\u1ebft qu\u1ea3 kh\u00e1c tr\u1ecb s\u1ed1 ri\u00eang c\u1ee7a linh ki\u1ec7n. N\u1ebfu c\u1ea7n \u0111o \u0111\u1ed9c l\u1eadp, ch\u1ec9 th\u00e1o m\u1ed9t \u0111\u1ea7u ho\u1eb7c ch\u00e2n \u0111o ph\u00f9 h\u1ee3p sau khi \u0111\u00e3 ng\u1eaft ngu\u1ed3n v\u00e0 x\u1ea3 h\u1ebft \u0111i\u1ec7n t\u00edch.<\/p>\n

          11. D\u1ea1ng h\u01b0 h\u1ecfng v\u00e0 nguy\u00ean nh\u00e2n<\/h2>\n

          D\u1ea5u hi\u1ec7u c\u00f3 th\u1ec3 quan s\u00e1t ho\u1eb7c \u0111o \u0111\u01b0\u1ee3c<\/h3>\n
            \n
          • \u0110\u1ee9t do qu\u00e1 d\u00f2ng<\/li>\n
          • T\u0103ng tr\u1ecb s\u1ed1 do qu\u00e1 nhi\u1ec7t ho\u1eb7c m\u1ed1i h\u00e0n suy gi\u1ea3m<\/li>\n
          • Sai s\u1ed1 \u0111o do \u0111\u01b0\u1eddng Kelvin b\u1ed1 tr\u00ed sai<\/li>\n
          • N\u1ee9t m\u1ed1i h\u00e0n tr\u00ean package c\u00f4ng su\u1ea5t<\/li>\n<\/ul>\n

            Nh\u1eefng nguy\u00ean nh\u00e2n c\u1ea7n ki\u1ec3m tra<\/h3>\n
              \n
            • D\u00f2ng ho\u1eb7c n\u0103ng l\u01b0\u1ee3ng xung v\u01b0\u1ee3t \u0111\u1ecbnh m\u1ee9c<\/li>\n
            • T\u1ea3n nhi\u1ec7t k\u00e9m<\/li>\n
            • B\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u00f2ng v\u00e0 \u0111\u01b0\u1eddng sense kh\u00f4ng \u0111\u00fang<\/li>\n
            • Chu k\u1ef3 nhi\u1ec7t l\u00e0m m\u1ecfi m\u1ed1i h\u00e0n<\/li>\n<\/ul>\n

              M\u1ed9t d\u1ea5u hi\u1ec7u c\u00f3 th\u1ec3 xu\u1ea5t ph\u00e1t t\u1eeb nhi\u1ec1u nguy\u00ean nh\u00e2n. Ch\u1ec9 k\u1ebft lu\u1eadn linh ki\u1ec7n h\u1ecfng sau khi k\u1ebft h\u1ee3p k\u1ebft qu\u1ea3 \u0111o, s\u01a1 \u0111\u1ed3 m\u1ea1ch v\u00e0 \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh.<\/p>\n

              12. C\u00e1ch l\u1ef1a ch\u1ecdn linh ki\u1ec7n thay th\u1ebf<\/h2>\n
                \n
              • \u0110\u00fang tr\u1ecb s\u1ed1 v\u00e0 dung sai<\/li>\n
              • C\u00f4ng su\u1ea5t, d\u00f2ng v\u00e0 n\u0103ng l\u01b0\u1ee3ng xung kh\u00f4ng th\u1ea5p h\u01a1n linh ki\u1ec7n c\u0169<\/li>\n
              • TCR ph\u00f9 h\u1ee3p \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ea7n \u0111o<\/li>\n
              • Gi\u1eef \u0111\u00fang k\u1ebft c\u1ea5u hai \u0111\u1ea7u ho\u1eb7c Kelvin v\u00e0 footprint<\/li>\n<\/ul>\n

                13. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

                C\u00f3 th\u1ec3 \u0111o \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng tr\u1ef1c ti\u1ebfp tr\u00ean bo m\u1ea1ch kh\u00f4ng?<\/h3>\n

                C\u00f3 th\u1ec3 ki\u1ec3m tra s\u01a1 b\u1ed9 sau khi \u0111\u00e3 ng\u1eaft ngu\u1ed3n v\u00e0 x\u1ea3 \u0111i\u1ec7n t\u00edch. Tuy nhi\u00ean, nh\u1eefng nh\u00e1nh m\u1ea1ch n\u1ed1i song song ho\u1eb7c linh ki\u1ec7n b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 l\u00e0m sai k\u1ebft qu\u1ea3; khi c\u1ea7n \u0111o \u0111\u1ed9c l\u1eadp ph\u1ea3i t\u00e1ch ch\u00e2n ph\u00f9 h\u1ee3p v\u00e0 \u0111\u1ed1i chi\u1ebfu s\u01a1 \u0111\u1ed3.<\/p>\n

                C\u00f3 th\u1ec3 d\u00f9ng linh ki\u1ec7n c\u00f3 th\u00f4ng s\u1ed1 cao h\u01a1n \u0111\u1ec3 thay th\u1ebf kh\u00f4ng?<\/h3>\n

                Tr\u01b0\u1edbc h\u1ebft, linh ki\u1ec7n thay th\u1ebf ph\u1ea3i \u0111\u00fang ch\u1ee9c n\u0103ng v\u00e0 tr\u1ecb s\u1ed1 ch\u00ednh. M\u1ed9t s\u1ed1 gi\u1edbi h\u1ea1n nh\u01b0 c\u00f4ng su\u1ea5t ho\u1eb7c \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 ch\u1ecdn cao h\u01a1n, nh\u01b0ng k\u00edch th\u01b0\u1edbc, \u0111\u1eb7c t\u00ednh xung, t\u1ea7n s\u1ed1 v\u00e0 nhi\u1ec7t v\u1eabn ph\u1ea3i ph\u00f9 h\u1ee3p. V\u1edbi linh ki\u1ec7n nhi\u1ec1u ch\u00e2n, s\u01a1 \u0111\u1ed3 ch\u00e2n b\u1eaft bu\u1ed9c ph\u1ea3i t\u01b0\u01a1ng th\u00edch.<\/p>\n

                \n

                T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n

                C\u00e1c t\u00e0i li\u1ec7u d\u01b0\u1edbi \u0111\u00e2y \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu k\u00fd hi\u1ec7u, nguy\u00ean l\u00fd, th\u00f4ng s\u1ed1 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111o ki\u1ec3m c\u1ee7a linh ki\u1ec7n.<\/p>\n

                  \n
                1. [1] Electrical Circuits<\/strong> \u2014 trang 1487, trang 262.<\/li>\n
                2. [2] Noise In Receiving Systems<\/strong> \u2014 trang 47.<\/li>\n
                3. [3] Audel Electrical Course for Apprentices and Journeymen eBook<\/strong> \u2014 trang 72.<\/li>\n
                4. [4] Electrician's Exam Question and Answers<\/strong> \u2014 trang 44.<\/li>\n
                5. [5] ON_Analog_Integrated_Circuits<\/strong> \u2014 trang 118, trang 1243.<\/li>\n
                6. [6] The Art of Electronics 2ed<\/strong> \u2014 trang 206.<\/li>\n<\/ol>\n<\/section>\n

                  14. K\u1ebft lu\u1eadn<\/h2>\n

                  Mu\u1ed1n s\u1eed d\u1ee5ng linh ki\u1ec7n n\u00e0y \u0111\u00fang c\u00e1ch, ng\u01b0\u1eddi \u0111\u1ecdc c\u1ea7n nh\u1eadn d\u1ea1ng \u0111\u00fang lo\u1ea1i, hi\u1ec3u k\u00fd hi\u1ec7u v\u00e0 \u0111\u01b0\u1eddng k\u1ebft n\u1ed1i, t\u00ednh \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c, \u0111o ki\u1ec3m an to\u00e0n v\u00e0 \u0111\u1ed1i chi\u1ebfu datasheet tr\u01b0\u1edbc khi thay th\u1ebf.<\/p>\n","protected":false},"excerpt":{"rendered":"

                  T\u00ecm hi\u1ec3u \u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng: k\u00fd hi\u1ec7u, ki\u1ec3u \u0111\u00f3ng g\u00f3i, c\u00f4ng th\u1ee9c, c\u00e1ch m\u1eafc trong m\u1ea1ch, ph\u01b0\u01a1ng ph\u00e1p \u0111o, l\u1ed7i th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch ch\u1ecdn linh ki\u1ec7n thay th\u1ebf.<\/p>\n","protected":false},"author":1,"featured_media":1807,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-2509","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dien-tu"],"yoast_head":"\n\u0110i\u1ec7n tr\u1edf Shunt \u0111o d\u00f2ng l\u00e0 g\u00ec? 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