A novel reaching law sliding mode speed controller design for PMSM
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摘要: 针对永磁同步电机（PMSM）矢量控制系统由于时滞现象导致的d-q轴电流脉动大、速度响应慢等问题，设计一种积分型滑模（SMC）速度控制器。其中，基于幂次趋近律提出一种新型趋近律，并通过Lyapunov函数验证其稳定性。然后，在电机实验中，提出从微观的角度进行d-q电流与电机速度的相图绘制，进一步验证控制器的有效性。数值仿真和实验表明，与传统SMC控制器相比，该控制方法能够减小电流脉动，提高系统的调速稳定性和响应速度。Abstract: In the vector control system of a permanent magnet synchronous motor (PMSM), a speed controller based on sliding mode control (SMC) is designed for the problems of large d-q axis current ripple and unstable system performance due to the sampling time delay of the speed and current loops caused by the carrier period. Meanwhile, a novel reaching law is also proposed based on the power reaching law, and the speed controller designed according to the reaching law can better reduce the current ripple and chattering, and improve the system performance. The d-q axis current and motor speed waveforms in the motor experiments are analyzed from a microscopic perspective by plotting the phase diagram. Numerical simulations and experiments have demonstrated that the speed stability and response of the system can be improved by this control method compared with the conventional SMC controller.
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