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DESIGN AND CONTROL OF A BIDIRECTIONAL RESONANT DC–DC CONVERTER FOR AUTOMOTIVE ENGINE BATTERY HYBRID POWER GENERATORS

DESIGN AND CONTROL OF A BIDIRECTIONAL RESONANT DC–DC CONVERTER FOR AUTOMOTIVE ENGINE BATTERY HYBRID POWER GENERATORS

 ABSTRACT:

          In this project, a bidirectional dc–dc converter is proposed for the automotive engine/battery hybrid power generators. The two-stage bidirectional converter employing a fixed-frequency series loaded resonant converter is designed to be capable of operating under zero-current-switching turn-on and turn-off regardless of voltage and load variation, and hence its magnetic components and EMI filters can be optimized. Also, a new autonomous and seamless bidirectional voltage control method that combines two individual controllers for low-voltage side control and high-voltage side control by introducing a variable current limiter is proposed to provide uninterrupted power to critical ac loads and reduce the size of the dc bus capacitor and the transition time.

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