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A correction circuit of Hall-sensor-signal-based speed measurement for BLDC motors

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Abstract

This paper proposes a novel circuit for correcting the errors occurring in the speed measurement of a brushless DC (BLDC) motor with Hall sensors that are built in for commutation. Although the poles of the rotor are always placed with a uniform angular separation, the Hall sensors may not. The angular misalignment between the poles and the Hall sensors will cause errors in the speed measurement. With a method previously proposed to estimate the degree of misalignment, the speed errors can be minimized by our proposed circuit. This circuit is implemented in an FPGA with the aid of a hardware description language and is validated by the simulated results.

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Acknowledgments

This work is partly supported by the National Science Council, Taiwan, under contract NSC 100-2622-E-224-006-CC3.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Yunlin University of Science and Technology, Yunlin, 640-02, R.O.C. Taiwan

    Chung-Wen Hung & Ke-Cheng Huang

  2. Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology, Yunlin, 640-02, R.O.C. Taiwan

    Jhih-Han Chen

Authors
  1. Chung-Wen Hung
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  2. Jhih-Han Chen
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  3. Ke-Cheng Huang
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Corresponding author

Correspondence to Chung-Wen Hung.

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Hung, CW., Chen, JH. & Huang, KC. A correction circuit of Hall-sensor-signal-based speed measurement for BLDC motors. Artif Life Robotics 17, 80–85 (2012). https://doi.org/10.1007/s10015-012-0024-6

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  • DOI: https://doi.org/10.1007/s10015-012-0024-6

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