Steady-State Performance Analysis of Permanent Magnet Synchronous Generator with Capacitive Assistance

Abstract

This paper presents the steady-state performance analysis of an electrical connection scheme that improves the power factor and output power of a three-phase interior-rotor permanent magnet generator (IPMSG). The inverse saliency ratio ranges from 1 to 6. A three-phase capacitor is connected across the stator winding, close to the generator load, for each ratio. Leading current from the capacitor was used to improve the lagging power factor of the machine, maintain the load voltage under varying load conditions, and enhance the output power conversion ability, which the inverse saliency ratio scheme could not do alone, and without the need for external power electronics control circuitry. The numerical solution of the study was implemented in MATLAB®. The proposed IPMSG performance curves were enhanced with the generator yielding an improved output power of about 11.1% when compared with the inverse saliency ratio scheme without capacitors.