永磁同步电机无传感器控制及其启动策略
为了实现永磁同步电机的无速度传感器矢量控制，采用改进的磁链观测器法，用低通滤波环节代替纯积分环节，减小了初值误差及直流偏置误差，同时在极坐标系下对定子磁链幅值及相位进行补偿，实现转速和转子位置的准确估算。针对带载情况下无法自启动的问题，采用I-f控制自启动方法，避免了启动过程中出现过流情况。设计了一种新的切换方式，给定坐标角度按加权函数切换至位置观测值，同时相应改变定子电流给定值，保证电机平滑可靠地从I-f控制方式切换为矢量控制方式。实验表明，控制系统能够可靠稳定运行，切换过程平滑，控制性能良好。...
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| Published in | 电机与控制学报 Vol. 19; no. 10; pp. 1 - 6 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
浙江大学 电气工程学院,浙江 杭州,310027%浙江科技学院 自动化与电气学院,浙江 杭州,310023
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-449X |
| DOI | 10.15938/j.emc.2015.10.001 |
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| Summary: | 为了实现永磁同步电机的无速度传感器矢量控制，采用改进的磁链观测器法，用低通滤波环节代替纯积分环节，减小了初值误差及直流偏置误差，同时在极坐标系下对定子磁链幅值及相位进行补偿，实现转速和转子位置的准确估算。针对带载情况下无法自启动的问题，采用I-f控制自启动方法，避免了启动过程中出现过流情况。设计了一种新的切换方式，给定坐标角度按加权函数切换至位置观测值，同时相应改变定子电流给定值，保证电机平滑可靠地从I-f控制方式切换为矢量控制方式。实验表明，控制系统能够可靠稳定运行，切换过程平滑，控制性能良好。 |
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| Bibliography: | permanent magnet synchronous motor;sensorless control;I-f control;flux observer;state con-version 23-1408/TM ZHANG Yao-zhong, HUANG Jin, KANG Min （1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; 2. School of Automation and Electrical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China） In order to realize sensorless vector control of permanent magnet synchronous motor, a novel method based on improved flux observer was adopted. A low-pass filter was used instead of a pure inte-grator, which reduced the errors caused by the initial value and DC offset. The magnitude and phase er-rors of the stator flux linkage introduced by the low-pass filters were compensated in the polar coordinate to make accurate estimation of speed and rotor position. In order to start motor successfully under the load conditions, a start-up method called I-f control was used, which can avoid the problem of overcurrent. A new switching strategy was also adopted. The given pos |
| ISSN: | 1007-449X |
| DOI: | 10.15938/j.emc.2015.10.001 |