【摘要】 在研究内埋式永磁同步电机(IPMSM)无速度传感器控制策略的基础上,阐述了永磁同步电机弱磁控制的基本原理及弱磁扩速难的原因.运用龙贝格观测器估算电机转速,提出一种基于交轴电压的弱磁控制方法,利用交轴电压控制直轴电流,将交轴电压的期望值与反馈值作差,计算得到弱磁电流误差信号,对其进行PI运算得到弱磁电流。采用Matlab软件建立了系统仿真模型,验证了算法的正确性。针对1.5匹变频空调用永磁同步电机开发了基于STM32F103R8T6 ARM的弱磁控制系统实验平台,实验验证该控制算法可将变频空调压缩机驱动电机的可控频率提升至120Hz。更多还原

【Abstract】 Based on the research of Interior permanent magnet synchronous motor( IPMSM) sensorless control strategy,the basic principle of PMSM flux weakening control and the reason of technique difficult point of flux weakening were explained. Using a Luenberger observer for speed estimation,flux weakening control method based on motor speed and voltage of q-axis was proposed,d-axis current was controlled by q-axis voltage,the error signal of demagnetization current was obtained by subtracting actual value from feedback value of the q-axis voltage,and the demagnetization current was gained by using PI operation of its error signal. The SIMULINK model was founded by Matlab,and the validity of this method was testified by the simulation results. The experiment platform of the 1. 5P inverter air-conditioner IPMSM flux weakening control system was implemented by using STM32F103R8T6 ARM. It is verified by experimental results that the controllable frequency of PMSM can be improved up to 120Hz by the proposed flux weakening algorithm.更多还原