基于假定旋转坐标的高速永磁同步电机无传感器控制

Sensorless Control of High Speed Permanent Magnet Synchronous Motor Based on Hypothetical Reference Frame

以高速永磁同步电机为研究对象,提出了一种基于假定旋转坐标的无传感器控制方法。该方法无需对转子d轴的位置进行估计同样能够实现磁场定向,达到最大转矩电流比的控制效果。文中对此控制方法进行了理论分析,设计了基于该方法的无传感器控制系统。借助Matlab/Simulink工具对此控制系统进行了仿真研究,得到了与理论分析一致的仿真波形。为进一步检验控制方法的可行性,文中在额定功率为75kW的磁悬浮高速永磁同步电机上于27 000r/min的高转速下进行了验证实验。实验结果表明,在该转速下,文中提出的控制方法能够很好地实现最大转矩电流比的控制效果。

For high speed permanent magnet synchronous motor（PMSM）, a new sensorless control strategy based on hypothetical reference frame was presented. This control strategy could accomplish field orientation without estimating rotor position and achieve the maximum ratio of torque to current. After theoretical analysis of this new strategy, the control system was established and then simulated using Matlab/Simulink, and the simulation waves turned out to be consistent with the theory analysis. A verification test has been accomplished on a high speed PMSM with the rated power of 75kW, in the speed of 27 000r/min. The result indicates that the performance using the control strategy can realize the maximum ratio of torque to current under the speed of the 27 000r/min.