Motor Current Feedback-Only Active Damping Controller With High Robustness for <i>LCL</i>-Equipped High-Speed PMSM
Jiaxin Zhou, Yu Yao, Yunkai Huang, Fei Peng
Abstract
This article proposes a flexible active damping method for an <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCL</i> -equipped high-speed permanent magnet synchronous motor. The damping ratio of the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCL</i> 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 be easily applied 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 72-kr/min test motor verify the stability and robustness of the proposed control strategy.