多直列接続したコンデンサの電圧均一化を目的とした共振形スイッチトキャパシタコンバータ

抄録

This paper describes a resonant switched-capacitor converter (RSCC) for voltage balancing of several capacitor or battery modules connected in series. This voltage balancing circuit carries an electric charge between the capacitor modules with a soft switching operation, resulting in a reduction in power loss and EMI. Moreover, a phase-shift control method is applied to improve the voltage-regulation performance of the RSCC by applying a voltage feedback control. This paper analyzes the relation between the capacitor currents and the resonant currents in the RSCC. Based on the analysis, a new controller is proposed for a circuit configuration having capacitors more than three. The experimental results confirm the validity and effectiveness of the proposed control method.