各向异性永磁同步电机低速控制策略

针对各向异性永磁同步电机(PMSM)无传感器控制时使用高频信号导致的转矩脉动、噪声和振动问题,设计了一种新型的各向异性PMSM无速度传感器控制策略。新方案具有较宽的速度控制范围,尤其是可以适用于低转速,且无需注入任何信号。新控制器基于改进型的反电动势观测器实现,消除了电机在发电模式下运行时传统观测器可能出现的不稳定。利用各向异性PMSM驱动试验平台对新型控制策略进行了测试。实验结果表明,新控制器的电机驱动控制性能较好,并在低速时保持系统正常运行。

Low Speed Control Strategy of Anisotropic Permanent Magnet Synchronous Motor

In order to solve the problems of torque ripple,noise and vibration caused by high frequency signals in sensorless control of anisotropic permanent magnet synchronous motor(PMSM),a novel anisotropic PMSM speed sensorless control strategy was designed.The new solution had a wide range of speed control,included low speed conditions,without the need to inject any signals.The new controller was based on a modified back EMF observer that eliminated the instability which could be occurred with conventional observers when the motor was operated in generating mode.The new control strategy was tested by using an anisotropic PMSM driven test platform.The experimental results show that the new controller has better motor drive control performance and keeps the system running normally at low speeds.