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Compensation Method of Position Signal Error with Misaligned Hall-Effect Sensors of BLDC Motor
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 Title & Authors
Compensation Method of Position Signal Error with Misaligned Hall-Effect Sensors of BLDC Motor
Park, Joon Sung; Choi, Jun-Hyuk; Lee, Ju;
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 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;
 Language
English
 Cited by
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