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<p>This paper addresses improving the chattering problem and convergence speed in Permanent Magnet Synchronous Motor (PMSM) speed control employing Sliding Mode Control (SMC). In conventional SMC, chattering occurs inevitably due to the sign function. This phenomenon decreases control accuracy in the motor drive system. This investigation introduces a new SMC with an updated reaching rule. For this purpose, this investigation presents a new sliding controller in which a new reaching rule is used. In this new reaching law, instead of using the sign term, hyperbolic terms along with power terms are used to eliminate the chattering phenomenon and increase the convergence speed. To strengthen the control framework for abrupt shifts in load and torque disturbances, this article employs a sliding estimator to calculate the torque of the load and send it to the controller. Laboratory tests showed that the recommended tactic effectively controls PMSM motor speed. According to the results obtained, the proposed method was able to reduce the convergence time by 70% and also improve the tracking error by 60%.</p>

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Robust Speed Control of Permanent Magnet Synchronous Motors with Eliminated Chattering and Short Convergence Time

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • Gang Ye

摘要

This paper addresses improving the chattering problem and convergence speed in Permanent Magnet Synchronous Motor (PMSM) speed control employing Sliding Mode Control (SMC). In conventional SMC, chattering occurs inevitably due to the sign function. This phenomenon decreases control accuracy in the motor drive system. This investigation introduces a new SMC with an updated reaching rule. For this purpose, this investigation presents a new sliding controller in which a new reaching rule is used. In this new reaching law, instead of using the sign term, hyperbolic terms along with power terms are used to eliminate the chattering phenomenon and increase the convergence speed. To strengthen the control framework for abrupt shifts in load and torque disturbances, this article employs a sliding estimator to calculate the torque of the load and send it to the controller. Laboratory tests showed that the recommended tactic effectively controls PMSM motor speed. According to the results obtained, the proposed method was able to reduce the convergence time by 70% and also improve the tracking error by 60%.