一种新型的内置式永磁同步电机无位置传感器低速控制策略

发布时间：2018-03-13 06:45

本文选题：内置式永磁同步电机　切入点：无位置传感器　出处：《中国电机工程学报》2017年20期 　论文类型：期刊论文

【摘要】：在基于高频注入的内置式永磁同步电机(interior permanent magnet synchronous motor,IPMSM)无位置传感器低速控制场合,需要使用滤波器提取位置信息和反馈电流环基频分量,但滤波器会导致信号延迟、减小电流环带宽。同时,为提高观测位置的精度,必须对逆变器电压误差进行补偿,由于数字控制系统有一个开关周期的延迟,采用先计算后补偿的方式复杂且准确度不高。针对以上两个问题,该文提出一种基于dq轴电压信号注入的转子位置观测方法。通过将磁场定向控制(field oriented controller,FOC)周期与电压信号注入周期相分离,避免了滤波器的使用。通过在估计差的补偿。最后在一套1.5k W IPMSM无位置传感器矢量控的d轴或q轴依次注入正反电压信号实现了对逆变器电压误制系统实验平台验证了控制策略的有效性。
[Abstract]:In the low speed position sensorless control situation of the built-in permanent magnet synchronous motor (PMSM) based on high frequency injection, it is necessary to use a filter to extract the position information and feedback the fundamental frequency component of the current loop, but the filter will lead to the delay of the signal. At the same time, in order to improve the accuracy of the observation position, the voltage error of the inverter must be compensated because the digital control system has a switching period delay. The method of calculating first and then compensating is complicated and inaccurate. In view of the above two problems, In this paper, a rotor position observation method based on dq-axis voltage signal injection is proposed, by separating the field oriented controller FOC period from the voltage signal injection period. The use of filter is avoided. Finally, an experimental platform of inverter voltage mismaking system is realized by compensating in estimation error. Finally, a 1.5 kW IPMSM position sensorless vector controlled d axis or Q axis is injected into positive and negative voltage signals in turn. The effectiveness of the control strategy is verified.
【作者单位】：湖南大学电气与信息工程学院;
【基金】：湖南省重点研发计划(2015GK2004)~~
【分类号】：TM341

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