初级绕组分段永磁直线电机段间推力优化控制

发布时间：2019-07-03 11:56

【摘要】：为克服初级绕组分段永磁同步直线电机(PWS-PMLSM)动子在定子段间运行中存在的推力波动,提高电机的动态响应能力,结合双逆变器交替供电模式提出了一种复合控制方法。利用有限元方法分析了动子出入定子段过程中各定子电磁参数的变化规律,从而建立了PWS-PMLSM的数学模型。依据电机模型,分析了段间推力波动产生的机理,提出了定子段间电流同步跟踪策略来减小各段间电流差异,但此方法依赖于极高的电流响应速度,因此又结合改进的PWM预测控制方法来提高电流调节速度,实现段间电流同步控制。段间电流同步跟踪结合改进PWM电流预测控制方法可以有效抑制PWS-PMLSM段间推力波动,提高系统动态性能。对所提算法进行了仿真和实验验证,并取得了良好的效果。
[Abstract]:In order to overcome the thrust fluctuation of primary winding segmented permanent magnet synchronous linear motor (PWS-PMLSM) in the operation of stator segments and improve the dynamic response ability of the motor, a compound control method is proposed in combination with the alternating power supply mode of double inverters. The finite element method is used to analyze the variation of electromagnetic parameters of each stator in the process of moving sub-entry and exit stator segment, and the mathematical model of PWS-PMLSM is established. According to the motor model, the mechanism of thrust fluctuation between segments is analyzed, and a synchronous current tracking strategy between stator segments is proposed to reduce the current difference between segments, but this method depends on very high current response speed, so the improved PWM predictive control method is combined to improve the current regulation speed and realize the synchronous control of inter-segment current. The synchronous tracking of inter-segment current combined with the improved PWM current predictive control method can effectively suppress the thrust fluctuation between PWS-PMLSM segments and improve the dynamic performance of the system. The proposed algorithm is simulated and verified by experiments, and good results are obtained.
【作者单位】：哈尔滨工业大学电气工程及自动化学院;
【基金】：国家自然科学基金(51177024) 国家科技重大专项(2009ZX02207-001) 国家杰出青年科学基金(51225702)
【分类号】：TM359.4

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