This is an alternating current generator.

这是一台交流发电机。

The electro-magnetic microgenerator utilizes a moving magnet or coil for inducing an alternating electric current in a circuit.

微型电磁发电器移动中的磁铁或线圈，在电路中制造感应交流电。

The result shows that CJD alternating current electrodynamometer has simple structure and the energy feedback efficiency can reach 74%, with outstanding energy-saving effect, good control stability.

运行结果表，该CJD交流电力测功机控制性能稳定，可靠性好，节能效果显著，能量馈效率最高可达到74%。