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A Novel Method to Suppress Mid-Frequency Vibrations with a High Speed-Loop Gain for PMSM Control
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  • Journal title : Journal of Power Electronics
  • Volume 16, Issue 3,  2016, pp.1076-1086
  • Publisher : The Korean Institute of Power Electronics
  • DOI : 10.6113/JPE.2016.16.3.1076
 Title & Authors
A Novel Method to Suppress Mid-Frequency Vibrations with a High Speed-Loop Gain for PMSM Control
Li, Qiong; Xu, Qiang; Huang, Shenghua;
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PI controllers are one of the most widely used controllers in industrial control systems due to their simple algorithms and stability. The parameters Kp and Ki determine the performance of the system response. The response is expected to improve by increasing the gain of the PI controller. However, too large a gain will accelerate the speed response and cause vibrations, which is not what is expected. This paper proposes a way to suppress vibrations by detecting the vibration frequency and extracting the vibration signal as a compensation to the speed feedback. Additionally, in order to improve its disturbance rejection ability, a low-order disturbance observer is proposed. This paper also explains the operation principle of the proposed method by analyzing the transfer function and it describes the design of the controller parameters in detail. Simulation and experimental results are provided to verify the merits of the proposed method. These results also show the good performance of the proposed method. It has a rapid response and suppresses vibrations.
AC motor drives;Robust control;Speed control;Vibration control;
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