双三相PMSM优化谐波电流注入MTPPC控制

Optimized Harmonic Current Injection MTPPC Control for Dual Three-phase PMSM

为提高双三相永磁同步电机(PMSM)驱动系统的输出转矩,设计了一种基于优化谐波电流注入的最大转矩峰值电流比(MTPPC)控制策略。在矢量空间解耦(VSD)模型中,通过引入两组正交的DQ1和DQ2参考系可简化控制器设计,在给定的峰值相电流下,通过在DQ2参考系中注入谐波电流可增加输出转矩,但注入的谐波电流也将产生小的直流转矩和谐波转矩。对此,推导了双三相PMSM的综合转矩模型,基于该模型分析了感应转矩分量,并引入到注入谐波电流的优化设计中。利用双三相PMSM驱动实验平台开展了实验测试,实验结果表明,测试电机的输出转矩可以增加10%以上,而转矩脉动可忽略不计。

To increase the output torque of the dual three-phase permanent magnet synchronous motor(PMSM)driving system,a maximum torque per peak current(MTPPC)control strategy based on optimized harmonic current injection has been designed.The vector space decoupling(VSD)model can simplify the controller design by introducing two sets of orthogonal DQ1 and DQ2 reference frames.At the given peak phase current,the output torque can be increased by injecting harmonic current in the DQ2 reference frame,but the injected harmonics current will also induce a small DC torque and harmonic torques.A comprehensive torque model of dual three-phase PMSM is derived.Based on the model,the induced torque component have been analyzed and introduced into the optimal design of the injected harmonic current.Experimental tests are carried out by using a dual three-phase PMSM driving experimental platform.The results show that the output torque of the test motor can be increased by more than 10%with a negligible increase in torque ripple.