A Variable-Sampling Controller for Brushless DC Motor Drives With Low-Resolution Position Sensors

• Published in: IEEE transactions on industrial electronics (1982) Vol. 54; no. 5; pp. 2846 - 2852
• Main Authors: Hung, Chung-Wen, Lin, Cheng-Tsung, Liu, Chih-Wen, Yen, Jia-Yush
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.10.2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Brushless DC motors; Brushless motors; Computer simulation; Control systems; D C motors; Direct current; Discrete-time sliding-mode control; Error correction; Feedback; Halls; Motor drives; Motors; Position measurement; Sampling methods; Sensor phenomena and characterization; Sensor systems; Sensors; Sliding mode control; variable structure control (VSC); variable-sampling systems; Velocity measurement
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2007.901303

This paper proposes a variable-sampling variable structure controller (VSC) for brushless dc (BLDC) motor drives with low-resolution position sensors (Hall sensors). The variable-sampling characteristics arising from the situation where measurements depend on the path-embedded sensors will result in the uncertainty of the discrete-time models. To circumvent this issue, a modification of the conventional discrete-time VSC control law for BLDC motor drives with Hall sensors is derived to achieve the robustness of speed control. Three measurement error-mitigation methods are also presented to reduce the errors due to low-resolution position feedback. Both simulated and experimental results confirm the effectiveness of the proposed controller and error-mitigation techniques.