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A Novel Technique to Correct the Unwanted Zero Position Signal of Faulty Encoder for Accurate Speed and Position Estimation of PMSM Drive

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Abstract

In this work, a real-time problem of inaccurate rotor zero position information of PMSM caused by faulty encoder is rectified and the smooth operation of vector-controlled PMSM drive is obtained. The rotor zero position information is given by the index signal of the encoder. It should provide one pulse in each mechanical revolution of the rotor, which denotes the zero position of the rotor. Due to unwanted pulse problem in the faulty encoder, index signal provides undesired multiple pulses at zero position, which gives wrong information of rotor position and thus the performance of PMSM degrades. For such situation, an algorithm is proposed to eliminate the faulty unwanted zero position signal of the encoder and give a precise rotor position. To verify the efficacy of the proposed algorithm, it is tested in a PMSM drive with constant torque angle vector control technique. The motor is operated at different speeds in both clockwise and counter-clockwise directions, and the obtained results show the perfect utility of the proposed scheme.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Institute of Technology, Shillong, Meghalaya, India

    Raja Gandhi, Edi Sankararao & Rakesh Roy

  2. Department of R & D in India, Nippon Electricals Limited, Hosur, Tamil Nadu, India

    Pratikanta Mishra

Authors
  1. Raja Gandhi
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  2. Edi Sankararao
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  3. Pratikanta Mishra
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  4. Rakesh Roy
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Correspondence to Raja Gandhi.

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Gandhi, R., Sankararao, E., Mishra, P. et al. A Novel Technique to Correct the Unwanted Zero Position Signal of Faulty Encoder for Accurate Speed and Position Estimation of PMSM Drive. Iran J Sci Technol Trans Electr Eng 48, 289–301 (2024). https://doi.org/10.1007/s40998-023-00662-1

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  • DOI: https://doi.org/10.1007/s40998-023-00662-1

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