Abstract
This paper proposes a flexible active damping method for LCL-equipped high-speed permanent magnet synchronous motor. The damping ratio of the LCL resonance can be freely designed by the proposed high-order partial-state (virtual output voltage and the capacitor current) feedback. Moreover, a coefficient selection method is developed to complete the design of the damping system quickly and efficiently. As the main contribution, the proposal can easily apply to single-sensor (motor current feedback-only) applications to eliminate the sensor of the capacitor current with high parameter robustness. The experimental results of a 72kr/min test motor verify the stability and robustness of the proposed control strategy.
Published Version
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