目前在工业现场,变频器主要应用于交流电机类设备,目的是为了提高该类设备的利用率,同时达到节能降耗的效果。变频器是一种利用电力半导体器件的通断作用将工频电源变换为另一频率的电能控制装置,能实现对交流异步电机的软起动、变频调速、提高运转精度、改变功率因数、过流/过压/过载保护等功能。但其在 Currently in the industrial field, the inverter is mainly used in AC motor equipment, the purpose is to improve the utilization of such equipment, while achieving the effect of energy saving. Inverter is a power semiconductor device using the on-off effect of the power frequency power conversion to another frequency of electrical energy control device, AC induction motor can achieve the soft start, frequency control, improve operating accuracy, change the power factor, too Flow / over-voltage / overload protection and other functions. But it’s there