Error Compensation of Linear Hall Based Position Detection for Tubular Permanent Magnetic Linear Synchronous Motor
Yan Leyang1,Ye Peiqing2,Zhang Yong1,Zhang Hui3
1.Department of Mechanical Engineering Tsinghua University Beijing 100084 China 2.The State Key Laboratory of Tribology Tsinghua University Beijing 100084 China 3.Beijing Key Laboratory of Precision/Ultra-Precision Manufacturing Equipments and Control Tsinghua University Beijing 100084 China
Abstract：Position detection based on linear hall sensors for permanent magnetic linear synchronous motor exists error. To tackle this problem, a compensation method combing offline calibration and online Kalman filter was proposed. Errors of hall sensor signals could be classified as DC offset, amplitude imbalance and containing harmonics. The former two factors generate 1st and 2nd order errors in position detection result, and are compensated by offline calibrating use the offset error and amplitude error and ratio achieved by two hall signals. Harmonics in hall sensor signals are caused by air-gap magnetic distortion, the magnetic harmonic content is analyzed by using finite element simulation, coming to the conclusion that magnetic distortion would generate 4th order error in position detection result. So, online Kalman filter was utilized to extract fundamental component from hall signals and to eliminate the influence of harmonics. Experimental results show that the position detection error is reduced by 81%, indicating the validity of the proposed compensation method.
严乐阳,叶佩青,张勇,张辉. 圆筒型永磁直线同步电机用线性霍尔位置检测的误差补偿[J]. 电工技术学报, 2017, 32(5): 26-32.
Yan Leyang,Ye Peiqing,Zhang Yong,Zhang Hui. Error Compensation of Linear Hall Based Position Detection for Tubular Permanent Magnetic Linear Synchronous Motor. Transactions of China Electrotechnical Society, 2017, 32(5): 26-32.
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2017, Vol. 32 
