Improving power factor of the SynRM using dual inverters with a floating capacitor

The synchronous reluctance motor (SynRM) has the advantages of low manufacturing cost, simple control method and high temperature resistance, but the power factor is a major drawback. In this paper, the topology of open-end dual inverters with floating capacitor is applied to feed the SynRM. The floating capacitor of the topology can provide reactive power compensation to achieve the unit power factor of the main inverter, along with the optimization of SynRM's current angle. Simulation results validate that adopting the floating capacitor topology and the proposed control strategy can effectively improve the power factor of the motor and keep almost unit power factor viewed from the main inverter side.