This is an alternating current generator.

这是一台交流发机。

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

磁发器以移动中的磁铁或线圈，在路中造感应交流。

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.

运行结果表明，该CJD交流力测功机控稳定，可靠好，节效果显著，量反馈效率最高可达到74%。