内置式永磁同步电动机弱磁调速优化控制

Optimized Flux-Weakening Speed Control of Interior Permanent Magnet Synchronous Motor

从永磁同步电机(PMSM)的矢量控制出发,提出了一种PMSM弱磁优化控制方法。内置式永磁同步电机(IPMSM)相对表贴式永磁同步电机弱磁能力强,调速范围宽,以IPMSM为对象,对弱磁调速进行了仿真与优化。PMSM在基速以下采用最大转矩电流比的恒转矩控制,减小了电机损耗,提高了逆变器的效率,在基速以上采用恒功率调速。直轴电流去磁调速结合交轴电流去磁调速的弱磁控制方式,提高了PMSM的功率因数,扩展了调速范围。针对弱磁环节转速的波动问题,在传统PI控制上做出改进,提出了模糊自整定PI的控制方式,提高了PMSM弱磁调速的性能。在MATLAB/Simulink中搭建仿真模型,验证了该控制方法的可行性。

Based on the vector control of permanent magnet synchronous motor(PMSM),an optimized flux-weakening control method of PMSM was proposed.The interior permanent magnet synchronous motor(IPMSM)had a relatively wider speed adjustment range than the surface-mount PMSM.Taking IPMSM applied as the object,we carried out simulation and optimization of the flux-weakening speed control.PMSM used the maximum-torque-per-ampere constant-torque control below the base speed to reduce the motor loss and improve the efficiency of the inverter.Above the base speed,PMSM adopted constant-power speed control.The combination of cross-axis current control and direct-axis current control in the flux-weakening control method could improve the PMSM power factor and extend the speed adjustment range.Aiming at the fluctuation of the weak ring speed,the fuzzy self-tuning PI control method was proposed based the traditional PI control.The simulation model was established in MATLAB/Simulink,and the feasibility of the control method was verified.