Sensorless Control of PMSM Based on Non-injection Method in Low Speed Domain

doi:10.11985/2022.03.018

Abstract

Abstract:

Considering the additional noise and loss caused by the commonly used high-frequency injection method at the low-speed range, a new method is proposed, only the current derivative under the action of zero voltage vector in the SVPWM control mode is required to estimate the position. Under the range of the action of zero voltage vector, the relationship between the d-axis current derivative and the rotor position is obtained by deriving the equation of the PMSM under the estimated rotating coordinate. This algorithm is verified in the Matlab/Simulink, and the simulation results show that this algorithm can estimate the rotor position accurately and quickly under the condition of starting with load and step input of speed, and the position error is less than 1°.

Key words: PMSM, sensorless control, current slope, zero voltage vector

CLC Number:

TM921

XIE Mansha, LI Ping, ZHAO Feng, XIAO Huiwen, LIAN Guangkun. Sensorless Control of PMSM Based on Non-injection Method in Low Speed Domain[J]. Journal of Electrical Engineering, 2022, 17(3): 154-161.

Figures/Tables 18

References 16

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参数	数值
定子电阻/Ω	0.774
直轴电感/mH	8.9
交轴电感/mH	11.9
极对数	3
永磁磁链/Wb	0.268