[关键词]
[摘要]
永磁同步电机(PMSM)磁场定向控制策略鲁棒性差、动态响应速度慢,一般需要复杂的PID参数整定方法,并且很难在较大的速度范围内通过固定的一组PI参数获得较优的静动态性能。为了解决上述难题,提出一种有限控制集电流预测策略用于PMSM的电流环控制,该方法直接处理离散开关状态集合而无需复杂的空间矢量调制过程,利用快速转矩响应通过电流偏差构造价值函数对电机负载切换时转矩脉动进行优化。对控制延时进行补偿减小电流谐波畸变降低稳态转矩脉动。仿真结果表明:与传统的磁场定向控制方法相比,所提方法具有更好的静动态性能,且在低速、高速时该方法均可以有效的减小定子电流波动,抑制了电机的转矩脉动。
[Key word]
[Abstract]
The field oriented control strategy of permanent magnet synchronous motors (PMSMs) has poor robustness and slow dynamic response, complex PID parameter tuning methods are generally required, and it is difficult to obtain good dynamic and steady state performance in a larger speed range through a fixed set of PI parameters. In order to solve the above problems, a finite control set current prediction strategy is proposed for the PMSM current loop control. This method directly deals with the set of discrete switching states without the need for a complex space vector modulation process, and uses its fast torque response to construct a value function pair through current deviation. The torque ripple is optimized when the motor load is switched. Compensation for control delay reduces both the current harmonic distortion and the steady state torque ripple. Simulation results show that compared with the traditional field oriented control method, the proposed scheme has good static and dynamic performance, and at low speed and high speed, this method can effectively reduce the stator current fluctuation and suppress the motor torque ripple.
[中图分类号]
[基金项目]
国家自然科学基金项目(51705376)