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http://dx.doi.org/10.5370/JEET.2016.11.4.889

Compensation Method of Position Signal Error with Misaligned Hall-Effect Sensors of BLDC Motor  

Park, Joon Sung (Dept. of Electrical Engineering, Hanyang University)
Choi, Jun-Hyuk (Intelligent Mechatronics Research Center, Korea Electronics Technology Institute)
Lee, Ju (Dept. of Electrical Engineering, Hanyang University)
Publication Information
Journal of Electrical Engineering and Technology / v.11, no.4, 2016 , pp. 889-897 More about this Journal
Abstract
This paper presents an improved approach for compensating rotor position signal displacement in brushless DC (BLDC) motors with misaligned hall-effect sensors. Typically, the hall-effect sensors in BLDC motors are located in each phase and positioned exactly 120 electrical degrees apart. However, limitations in mechanical tolerances make it difficult to place hall-effect sensors at the correct location. In this paper, a position error compensator to counteract the hall-effect sensor positioning error is proposed. The proposed position error compensator uses least squares error analysis to adjust the relative position error and back-EMF information to reduce the absolute offset error. The effectiveness of the proposed approach is verified through several experiments.
Keywords
Brushless dc (BLDC) motor; Hall-effect sensor; Position estimation; Least square error; Back-EMF;
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Times Cited By KSCI : 2  (Citation Analysis)
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