期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 67, 期 7, 页码 6089-6100出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2019.2947875
关键词
Rotors; Phase locked loops; Sensorless control; Synchronous motors; Permanent magnet motors; Observers; Iterative search strategy; permanent magnet motors; phase locked loop (PLL); sensorless control
资金
- National Natural Science Foundation of China [51875261]
- Natural Science Foundation of Jiangsu Province of China [BK20180046, BK20170071]
- Qinglan project of Jiangsu Province
- Natural Science Foundation of Jiangsu Higher Education Institutions [17KJA460005]
- Six Categories Talent Peak of Jiangsu Province [2015-XNYQC-003]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX19_0574]
This article presents a novel method for the sensorless control of interior permanent-magnet synchronous motors. An iterative search strategy based on dichotomy is proposed to provide a finite number of rotor position angles with good accuracy. These position angles are used to calculate the back electromotive force (EMF) in d-axis. The optimal rotor position angle is the one that yields a back EMF minimizing the defined cost function. With the increase of the iterations, the accuracy of rotor position angle increases geometrically. To effectively extract the back EMF signal under the low-speed condition, the high-frequency signal injection method is used to realize the low-speed operation of the motor. A hybrid control strategy is adopted to achieve the smooth switching from the low-speed to high-speed. The performance of the proposed method has been validated experimentally and compared with that of the conventional phase locked loop under different conditions.
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