伺服电机转子位置检测的误差分析与补偿

doi:10.3969/j.issn.1000-1158.2022.10.12

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Abstract Aiming at the problems of low accuracy, inconvenient installation and high cost in current motor rotor position measurement, a design scheme of rotor position sensor based on the combination of tunnel magnetoresistance effect and time grating technology is proposed. On the premise of not destroying the original structure of the motor, a pair of space orthogonal TMR chips are embedded in the front cover of the motor to realize the embedded position precise detection. According to the principle of TMR sensor rotor position calculation, the error components caused by installation error, electrical error and electromagnetic noise error of TMR sensor are analyzed. an error compensation method based on extreme learning machine is proposed. The model optimal parameters are obtained through training the real sample values and measured values. According to the model parameters, Rotor position error model is established, which is used to realize rotor position error compensation.The experimental results show that under the uniform speed of 2000r/min, the maximum measurement error of rotor position before compensation is 4.64° and the rotor position error is 0.315° after compensation, and the accuracy is improved by 93.2%.The embedded rotor position detection method provides a new method for motor rotor position detection.

Key words： metrology motor rotor position detection tunnel magnetoresistance embedded position time grating extreme learning machine

Received: 12 October 2021 Published: 14 October 2022

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TB971

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	ZHANG Tian-heng
	TONG Peng
	YANG Ji-sen

Cite this article:

ZHANG Tian-heng,TONG Peng,YANG Ji-sen. Error Analysis and Compensation of Servo Motor Rotor Position Detection[J]. Acta Metrologica Sinica, 2022, 43(10): 1319-1325.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.10.12 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I10/1319

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