DArsonval movement Coil Principlegalvanometer G 1 ammeter A

達松發可動線圈 D’Arsonval movement Coil 原理(Principle)：利用檢流計(galvanometer, G)設計 1. 安培計(ammeter, A) 2. 伏特計(voltmeter, V) 3. 歐姆計(ohmmeter, O) (參考三用電表) 1. 指針(Needle) 2. 空氣隙(Air Gap) 3. 永久磁鐵(Permanent Magnet) 4. 螺線彈簧(Solenoidal Coil) 5. 轉動線圈(Rotating Coil) 6. 轉動軸心(Pivot Rotating Coil) 7. 軟鐵心(Soft-Iron Core) 8. 均勻輻射狀磁場(Uniform Radial Field)

D'Arsonval meter 達松發表 Most meter movements are polarity-sensitive, one direction of current driving the needle to the right and the other driving it to the left. Some meter movements have a needle that is spring-centered in the middle of the scale sweep instead of to the left, thus enabling measurements of either polarity: Passing AC through the D'Arsonval meter movement causes

Most meter movements are polarity-sensitive, one direction of current driving the needle to the right and the other driving it to the left. Some meter movements have a needle that is spring-centered in the middle of the scale sweep instead of to the left, thus enabling measurements of either polarity: Passing AC through the D'Arsonval meter movement causes

指針式電表介紹 參考 http: //por. tw/Repair/rewrite. php/read-28. html