When an inverter works in open loop state, loading and unloading will change RMS of the output voltage because of the inductance of the filter, the on state resistance of the IGBT, the resistance of the wire, etc.

• 逆变器开环工作时 ,由于输出滤波器的电感、功率管导通压降以及导线电阻等多种因素的影响 ,使逆变器在加卸载过程中输出电压有效值发生变化。