基于饱和效应的面贴式永磁同步电动机转子初始位置检测
首发时间:2009-06-29
摘要:研究了一种简单有效的永磁同步电动机转子初始位置检测方法。该方法通过在电机定子绕组施加特定的电压信号,由于电机的饱和凸极效应,绕组电流随位置呈现不同幅值,据此可准确地估算出电机转子的初始位置。为了消除估算时电机转动的影响,采用正负脉冲电压交替施加的方式,同时这种方式也提高了检测速度。给出了顺序法和二分法两实现方法,并进行了对比。利用Matlab建立了具有饱和特性的永磁同步电动机模型,仿真结果证明了所用方法的有效性和可行性。
关键词: 永磁同步电动机 初始位置检测 饱和凸极效应 高频电压注入
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Rotor Initial Position Detection of Surface Mounted PMSM
Abstract:A simple and effective initial position detection method of surface-mounted PMSM Rotor is studied. By injecting a specific voltage signal to the stator windings, wingding current has different peak value because of saturation saliency effect, which it allows to estimate the initial rotor position accurately. In order to effect of rotation, positive and negative voltage pulses are injected alternately which can improve detection speed. Sequence and dichotomy methods are presented and compared. The electrical model of PMSM with saturation characteristic is established using Matlab, the simulation results illustrate correctness and feasibilities of the proposed method.
Keywords: PMSM initial position detection saturation saliency effect high frequency voltage injection
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