No-load EMF waveform is a key for conventional generator. To assess the power quality of Powerformer, it is needed to study no-load EMF waveform.

• 空载电势波形是研究传统发电机的一个关键问题,对于能量变换器,要想对其发电质量进行评定,也必须研究其空载电势波形。