Analysis of DC Generation System Using IPMSM and Series Resonant Circuit and Method for Determining Resonant Capacitor Capacitance

This paper presents analyses of direct-current power generation systems consisting of an interior permanent magnet synchronous machine (IPMSM), a full-bridge rectifier, and resonant capacitors (series resonant PMSG system). Furthermore, the resonant capacitor capacitance design is clarified. The behavior of the generation system at the resonant speed and other rotation speeds is analyzed considering the saliency of the IPMSM. It is found that the system operates with flux-weakening current desirable for the IPMSM above the resonance speed and that maximum torque per ampere operation can be achieved as per the design concept. In addition, numerical simulations of the series resonant PMSG system are performed using a circuit simulator to confirm that the generation system operates as in accordance with the analysis.