内置式永磁同步电动机弱磁调速优化控制

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。

Optimized FluxWeakening Speed Control of Interior PermanentMagnet Synchronous Motor

Based on the vector control of permanent magnet synchronous motor (PMSM), an optimized fluxweakening control method of PMSM was proposed. The interior permanent magnet synchronous motor (IPMSM) had a relatively wider speed adjustment range than the surfacemount PMSM. Taking IPMSM applied as the object, we carried out simulation and optimization of the fluxweakening speed control. PMSM used the maximumtorqueperampere constanttorque control below the base speed to reduce the motor loss and improve the efficiency of the inverter. Above the base speed, PMSM adopted constantpower speed control. The combination of crossaxis current control and directaxis current control in the fluxweakening 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 selftuning 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.