Comparison of Two Types of DC Power Generation Systems with Permanent Magnet Synchronous Machines and Full-Bridge Rectifiers Using Resonant Circuits

Abstract

DC power generation systems equipped with engine-powered generators and rectifiers are installed in diesel-electric vehicles and series hybrid vehicles. Generally, systems with permanent magnet synchronous machines and full-bridge rectifiers are expected to be energy-efficient and inexpensive. However, it is difficult to increase the output power density of the generator because the generated voltage is limited within the voltage induced by the permanent magnet. In this study, the process of improving the power density of the systems by adding capacitors to form a resonant circuit is described. Subsequently, the characteristics of the systems with two types of resonant circuit were investigated by performing numerical simulations.