working coil

For the burn-out of normal excitation coil of contactor, it is proposed to depress its working voltage after startup.

对常励磁接触器线圈发热烧毁问题，采取在其启动后降低线圈工作电压的方法减少发热；

The results indicate that attaching pure iron to both ends of the GMM can enhance the working magnetic field, reduce the magnetic flux leakage, and increase the displacement output with reduced current in coil, thus improve the thermal condition of the transducer.

结果表明，在GMM棒两端安装电工软铁能够提高工作磁场强度，减少磁通泄漏，增加换能器输出位移并降低驱动电流，改善换能器的发热情况，从而整体改善超磁致伸缩换能器的性能。

In the full-bridge thyristor shunt-wound inversion power supply, the efficiency of heating smaller forgings limited by the working frequency is low because of the high output voltage, the long induction coil, and the great noise.

由于全桥晶闸管并联逆变电源的输出电压高，感应圈长，噪声大，受工作频率限制，加热中小锻件的效率低。