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Sensorless Control of PMBLDC Motor Using Flux Linkage-Based Position Estimation
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DOI：10.1109/JESTIE.2026.3663249.png)
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Abstract
En 中文
This study presents a novel approach for achieving highly accurate zero-speed position control in permanent magnet brushless direct current (PMBLDC) motor in electric vehicles (EVs). Proposed method employs a flux linkage function-based method independent of speed to zero-crossing point (ZCP) estimate rotor positions, integrating a ZCP detection technique to precisely initiate control at zero speed. This sensorless algorithm demonstrates versatility, catering to both motor startup and operational phases. Nevertheless, challenges emerge with using a low pass filter (LPF) for filtering notches from back-electromotive force (EMF) resulting to attenuation of magnitude and phase lag. This results in noticeable torque fluctuations at low speeds. A closed loop error correction algorithm is implemented to address these issues. It also analyses total commutation errors. In conclusion, this methodology offers a promising solution for achieving high-precision zero-speed position control in PMBLDC motors within EVs, ensuring accurate initiation from zero speed. Consequently, this study introduces an enhanced speed calculation method designed to minimize this delay. Proposed approach is also considered appropriate for regenerative braking for EV applications. These results confirm suitability of applied drive control.
Keywords:
Motors
Estimation
Rotors
Commutation
Motor drives
Observers
Accuracy
Demagnetization
Couplings
Torque
Brushless direct current motor (BLDCM) control
electric vehicle (EV) motor control
permanent magnet (PM) motor control
sensorless drive
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138
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