一种利用相电感的内置式永磁同步电机无位置传感器控制方法

A Sensorless Control Method for Interior Permanent Magnet Synchronous Machines Using Phase Inductance

针对内置式永磁同步电机,提出一种利用相电感信息的无位置传感器控制方法。在分析内置式永磁同步电机相电感分量的基础上,利用相电感之差消除其中直流分量对位置估算的不利影响。并以矢量形式表示相电感差,进行迭代求和运算,得到细分的电感矢量簇。进而对所得电感矢量簇的幅值进行逻辑比较,得到理论上可无限细分的转子位置信息,并依此对电机进行控制。所述电机转子位置获得方法不需要坐标变换等复杂运算,具有简单可靠的结构。实验结果表明,该控制方法在零速和低速时能可靠地估算转子位置,并具有良好的负载能力和动静态性能。

A sensorless control method based on phase inductance information is proposed for interior permanent magnet synchronous motors(IPMSMs). By analyzing the phase inductance components of IPMSM, the difference of phase inductance is put forward for eliminating the bad influence of DC component of phase inductance. Furthermore, with the iteration operation of phase inductance difference in the form of vectors, the subdivided inductance vector cluster is obtained. With the help of logical comparison of the inductance vector cluster, the rotor position which can be infinitely fractionized theoretically is achieved to control the IPMSM. The proposed rotor position estimated method need not the transformation of coordinates, and has brief structure. Experiment results show its reliable position estimation in zero and low speed. Moreover, it has good load capacity with fine static and dynamic performance.