利用瞬变电抗差异的SPMSM转子位置观测

发布时间：2018-06-16 14:22

本文选题：表贴式永磁同步电机 + 磁钢涡流　；参考：《微电机》2016年11期

【摘要】：针对不使用位置传感器时表贴式永磁同步电机(SPMSM)在静止和低速工况下对转子位置难以准确观测的困难,提出一种基于电枢绕组d、q轴瞬变电抗差异原理的转子位置观测新方法。该方法利用转子磁钢导电率分布在d、q轴位置的不对称,通过向电枢绕组注入高频脉振电压,从高频电流响应中提取出转子位置。分析表明,受到转子磁钢中感应电涡流作用的影响,d轴瞬变电抗会小于q轴瞬变电抗。二者的差异不仅取决于磁钢的形状,还与包裹磁钢的非磁性金属保护套以及注入信号的频率有关。文中给出了一台样机的有限元仿真分析结果,通过电机瞬变电抗差异的实测对分析结果进行了验证。
[Abstract]:In order to overcome the difficulty of accurate rotor position observation under static and low speed working conditions, a new rotor position observation method based on the principle of transient reactance difference of armature winding dnq axis is proposed for SPMSM (permanent Magnet synchronous Motor) without position sensor. In this method, the rotor position is extracted from the response of high frequency current by injecting high frequency pulse voltage into the armature winding using the asymmetric distribution of the magnetic conductivity of rotor steel in the position of dnq axis. The analysis shows that the transient reactance of d axis is smaller than that of Q axis transient reactance due to the effect of induced eddy current in rotor magnetic steel. The difference depends not only on the shape of the magnetic steel, but also on the non-magnetic metal cover wrapped in the magnetic steel and the frequency of the injection signal. In this paper, the finite element simulation results of a prototype are given, and the results are verified by the measured results of the transient reactance difference of the motor.
【作者单位】：清华大学电机系电力系统及发电设备安全控制和仿真国家重点实验室;
【基金】：国家自然科学基金资助项目51277102
【分类号】：TM341

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