Torque Ripple Reduction of the Torque Predictive Control Scheme for Permanent-Magnet Synchronous Motors
Torque Ripple Reduction of the Torque Predictive Control Scheme for Permanent-Magnet Synchronous Motors
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DOI：
10.1109/tie.2011.2157278
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发表时间：
2012-02-01
影响因子：
7.7
通讯作者：
Li, Yongdong
中科院分区：
文献类型：
--
作者：
Zhu, Hao;Xiao, Xi;Li, Yongdong
永磁同步电动机直接转矩控制（DTC）技术与其它电机控制算法相比，具有无需电流控制器、动态响应快等优点，受到越来越多的关注。然而，使用直接转矩控制技术时，系统中仍然存在较大的转矩和定子磁链脉动。这意味着永磁电机定子电压和电流谐波含量大。由于电机电磁转矩的变化与施加在电机上的电压有关，通过分析定子磁链、转矩和电压之间的关系，提出了一种永磁同步电机转矩预测控制方案。在每个数字信号处理器周期中，利用优化的电压来减小转矩涟漪，并且电压矢量角由转矩和磁链滞环控制器的输出确定。所提出的方案进行了仿真和实验验证。仿真和实验结果都表明，低转矩涟漪和减少定子电流谐波通过使用所提出的计划。
The direct torque control (DTC) technique of permanent-magnet synchronous motors (PMSMs) receives increasing attention due to its advantages in eliminating the current controllers and quicker dynamic response, compared with other motor control algorithms. However, high torque and stator flux ripples remain in the system when using DTC technologies. This means large stator voltage and current harmonic contents exist in the PM motors. Since the variation of motor electromagnetic torque is related to the voltages that are applied to the motor, by analyzing the relationships between stator flux, torque, and voltages, a PMSM torque predictive control scheme is proposed in this paper. In each digital signal processor cycle, the optimized voltage is utilized to reduce torque ripple, and the voltage vector angle is determined by the output of torque and flux hysteresis controllers. The proposed scheme is simulated and experimentally verified. Both simulation and experimental results have shown that low torque ripple and reduced stator current harmonics are achieved by using the proposed scheme.