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首页> 外文会议>IEEE Magnetics Conference >An improved method of initial rotor position estimation and magnetic polarity identification for surface permanent magnet synchronous motor
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An improved method of initial rotor position estimation and magnetic polarity identification for surface permanent magnet synchronous motor

机译：表面永磁同步电动机初始转子位置估计和磁极性识别的改进方法

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摘要

A position sensor is required in a Permanent magnet synchronous machines(PMSM) system, which will raise cost and reduced reliability. Sensorless control of PMSM drive overcome these difficulties. In the start-up control of sensorless PMSM, may cause a starting failure due to unknown rotor initial position. a voltage pulse injection method based on magnetic saturation effect has been proposed. A series of pulse voltage vectors with certain angular difference are injected into Surface mounted PMSM, and the rotor position can be judged by the response currents which are different from each other caused by the difference of magnetic saturation. The voltage vector angle needs to be divided continuously for high accuracy to avoid increasing error after the angle is smaller than a certain extent. The more situation is that the judgment of the rotor pole may be wrong due to small size of rotor poles, the difference of inductance between poles is unobvious, it makes the judgment of rotor poles become difficult and inaccurate. If the judgment is wrong, the motor rotates reversely in machine tools and robot applications, it could be unacceptable.
机译：永磁同步电机（PMSM）系统中需要位置传感器，这会增加成本并降低可靠性。 PMSM驱动器的无传感器控制克服了这些困难。在无传感器PMSM的启动控制中，由于未知的转子初始位置，可能导​​致启动失败。提出了一种基于磁饱和效应的电压脉冲注入方法。将一系列具有一定角度差的脉冲电压矢量注入到表面贴装式PMSM中，并且可以通过由磁饱和度差引起的互不相同的响应电流来判断转子位置。为了高精度，需要对电压矢量角度进行连续分割，以免在角度小于一定程度后增加误差。更多的情况是由于转子磁极的尺寸小，转子磁极的判断可能是错误的，磁极之间的电感差不明显，这使得转子磁极的判断变得困难和不准确。如果判断错误，则电动机在机床和机器人应用中会反向旋转，这可能是不可接受的。

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