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A DC-Link Voltage Compensation Method for Dual Permanent Magnet Synchronous Motor Drive

A308 method is proposed in this paper without additional switch leg to limit the fluctuation and offset of the center tap voltage of the dc-link capacitor. To reduce the fluctuation of the voltage in capacitor leg, three compensation states are defined. According to the three states, the fuzzy logic controller (FLC) is proposed. The simulation results demonstrate that the proposed algorithm can help the dual-Permanent Magnet Synchronous Motor(PMSM) system response quickly and improve stability of the dual-PMSM drive system.