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1·How to find the polarity of the primary coil?

怎么确定初级线圈的极性？

2·The power supply (22) includes a primary coil (32).

电源(22)包括初级线圈(32)。

3·The resistance of the primary coil has been neglected.

忽略原边线圈电阻的条件下推导出来的。

4·The transformer has a primary coil and a secondary coil.

变压器有一个初级线圈和次级线圈。

5·The induced electromotive force at the secondary coil can be got by changing the flux of the primary coil.

采用变磁阻法改变初级线圈的磁通，在次级绕组上得到相应的感应电势。

6·The DC excitation is internally converted to an AC carrier signal which excites the transducer's primary coil.

直流电压在内置电路被转换交流载波信号，激励传感器的初级线圈，一个集成的解调放大。

7·The inductive reactance of a primary coil is much larger than the value of load resistance converted into the primary;

变压器原边线圈电感的感抗远远大于负载电阻对原边的折算值；

8·The machine directly winds the primary coil on the rectangular enclosed voltage transformer core, which is originated by our institute.

该机可在矩形封闭的电压互感器铁芯上直接绕制一次线圈，为我所之首创。

9·The primary power supply is powered from the mains supply and energizes a lumped coil; the current ranges anywhere from 5 to125 amps.

主要的电力供给是来自市电电源并通过一个集合线圈激发；电流范围从5到125安培。

10·The receiver pad coils are magnetically coupled to the primary power coil.

电力接收垫线圈与主电力线圈是磁耦合的。