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Sensorless initial rotor position estimation of surface permanent-magnet synchronous motor

机译:表面永磁同步电动机的无传感器初始转子位置估计

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摘要

This paper presents a method of estimating the initial rotor position of a surface permanent-magnet synchronous motor without a position sensor. The estimation is performed by using the nonlinear magnetization characteristics of the stator core caused by the magnet of the rotor. This method is based on the principle that the d-axis current value for the voltage vector applied to the motor under some conditions increases as the voltage vector generated from the inverter approaches the N pole of the rotor. During the estimation process, the rotor is practically at standstill. The experimental results show that the average of the estimation error is /spl plusmn/3.8 electrical degrees.
机译:本文提出了一种在没有位置传感器的情况下估算表面永磁同步电动机初始转子位置的方法。通过使用由转子的磁体引起的定子芯的非线性磁化特性来进行估计。该方法基于以下原理:随着从逆变器生成的电压矢量接近转子的N极,在某些情况下施加到电动机的电压矢量的d轴电流值会增加。在估算过程中,转子实际上处于静止状态。实验结果表明,估计误差的平均值为/ spl plusmn / 3.8电度。

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