Position Sensorless Control of Synchronous Reluctance Machines Based on Magnetic Saturation Depending on Current Phase Angles

被引:8
作者
Kojima, Tetsuya [1 ]
Suzuki, Toshiki [1 ]
Hazeyama, Moriyuki [1 ]
Kayano, Shinsuke [2 ]
机构
[1] Mitsubishi Electr Corp, Adv Technol R&D Ctr, Amagasaki, Hyogo 6618661, Japan
[2] Mitsubishi Electr Corp, Himeji Works, Himeji, Hyogo 6700993, Japan
关键词
High frequency; Sensorless control; Stators; Rotors; Torque; Couplings; Saturation magnetization; Cross-coupling effect; position sensorless control; synchronous reluctance machine (SynRM); VECTOR CONTROL; MOTORS;
D O I
10.1109/TIA.2020.2970828
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Position sensorless control of synchronous reluctance machines is not easy due to nonlinear correlations caused by extensive magnetic saturation. This article investigates stability of a conventional saliency-based method and, for the first time, shows that the method becomes unstable at high torque with high magnetic saturation not due to cross-coupling effect itself but due to expansion of the cross-coupling effect through feedback of the estimated position. This instability occurs even when neither disappearance of the saliency nor reversal of the estimated dand q- axes arises. A novel method to overcome this instability is proposed, which utilizes magnetic saturation depending on current phase angles. The proposed method was verified by simulations and experiment using a prototype machine. The results demonstrated that the proposed method achieved stable sensorless operation at the maximum torque, and thus, surpassed the conventional saliency-based method, the feasible torque of which was limited to 60% of the maximum for the prototype machine.
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页码:2171 / 2179
页数:9
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