Position and Speed Estimation Method for Permanent Magnet Synchronous Motors Based on LowCost Hall Sensors

doi:10.3969/j.issn.1008-0198.2025.06.018

Abstract

Abstract: The installation position angle of the three-phase switch-type Hall position sensors for permanent magnet synchronous motors is prone to offset during mass production and installation, resulting in significant measurement errors in the closed-loop feedback speed and position signals of the motor vector control. To address the above problems, a rotor position and speed estimation method for permanent magnet synchronous motors based on Hall vector filtering is proposed. First, the two-phase orthogonal components of the Hall three-phase switch signal are obtained through coordinate transformation, and a full-order state observer with harmonic feedback calculation is constructed in the form of Hall vectors. An adaptive vector filter is introduced to extract the fundamental signal from it, thereby filtering out the low-order harmonic interference generated by the Hall sensor offset and obtaining a more accurate rotor position and speed. Simulation and experiments verify that this method can still accurately estimate the rotor position and speed after the Hall sensor is offset, reducing the estimation error and ensuring the normal and stable operation of the motor vector control system.

Key words: permanent magnet synchronous motor, Hall vector, adaptive filtering, rotor position and speed estimation

CLC Number:

TM451

ZENG Suicheng, LIU Zhihao, HONG Quan, DAN Hanbing, LI Li, LI Hui. Position and Speed Estimation Method for Permanent Magnet Synchronous Motors Based on LowCost Hall Sensors[J]. Hunan Electric Power, 2025, 45(6): 133-139.

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