An active filtering strategy of LCL filter for inverter power supply of electromagnetic pump

Abstract The inverter power supply for an electromagnetic pump is a motor controller based on three-phase inverter. This needs to be followed by LCL filter as connecting the pump. But has large resonance spike at point. can cause relatively interference control system and also increase harmonics of output current. Therefore, it necessary suppress resonant spikes filter. In this paper, active filtering strategy trap proposed comparing existing passive strategies. used generate anti-resonant peak point LCL, which cancel method ensures suppression effect without affecting