Research Article
Position Sensorless Control of Brushless DC Motor Based on Sliding Mode Observer
@INPROCEEDINGS{10.1007/978-3-030-94554-1_27, author={Li-jun Qiu and Ming-fei Qu and Xin-ye Liu}, title={Position Sensorless Control of Brushless DC Motor Based on Sliding Mode Observer}, proceedings={Advanced Hybrid Information Processing. 5th EAI International Conference, ADHIP 2021, Virtual Event, October 22-24, 2021, Proceedings, Part II}, proceedings_a={ADHIP PART 2}, year={2022}, month={1}, keywords={Sliding mode observer DC motor Sensor}, doi={10.1007/978-3-030-94554-1_27} }- Li-jun Qiu
Ming-fei Qu
Xin-ye Liu
Year: 2022
Position Sensorless Control of Brushless DC Motor Based on Sliding Mode Observer
ADHIP PART 2
Springer
DOI: 10.1007/978-3-030-94554-1_27
Abstract
In order to realize the position sensorless control of brushless DC motor, a position sensorless control method of brushless DC motor based on sliding mode observer is proposed. In order to reduce the chattering of the system, a smooth hyperbolic tangent function is introduced. Therefore, the control system can obtain a smooth linear back-EMF estimate without adding a low-pass filter and a phase compensation module, thereby avoiding the phase lag of the back-EMF estimate. The estimated BLDC motor position sensorless back EMF signal corresponds to 3 virtual Hall signals, and 6 discrete commutation signals are directly obtained, thus eliminating the need for fixed phase shift circuit and phase shift angle calculation. Simulations and experiments show that the proposed method can accurately estimate the line back EMF of the position sensorless brushless DC motor, and achieve the research goal of precise control of the position sensorless brushless DC motor.
