诗涵的回答：

Converter [k?n-'v?r-t?r] 转换器。教化者。 （电子）整流器。将交流转变成直流的变压器。 Umrichter [der]变流器。变频器。60Hz-50Hz converter, frequency changer converter n. device for changing alternating currents to direct currents (Electricity); one who causes others to change their beliefs (religious, political, etc.)

☆柠檬茶☆的回答：

转换器