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Speed Control of Magnetic Drive-Trains with Pole-Slipping Amelioration

Author

Listed:
  • Xiaowen Liao

    (Guangdong University of Petrochemical Technology (GDUPT), Maoming 525000, China
    The Joint Research Lab between GDUPT and University of Lincoln, Lincoln LN6 7TS, UK)

  • Chris Bingham

    (School of Engineering, University of Lincoln, Lincoln LN6 7TS, UK)

  • Tim Smith

    (School of Engineering, University of Lincoln, Lincoln LN6 7TS, UK)

Abstract

The paper introduces new techniques to reduce the potential for pole-slipping induced by control systems and presents a low-cost pole-slipping detection and recovery scheme for magnetic drive-trains (MDTs). For the first time, the paper shows that a combination of electromagnetic and load-torque excitations which individually are not greater than the maximum coupling torque can initiate pole-slipping. For applications where acceleration feedback is unavailable, the motor-side inertia is virtually increased with a tracking differentiator to provide feedback of acceleration. Subsequently, controller design and parameter optimization are discussed. Experimental measurements on a custom test facility verify the presented principles that low-bandwidth controller designs with low inertia ratios can accommodate a wider range of on-load startup torque and load-torque disturbances without pole-slipping. To address overload issues, a pole-slipping detection method based on the kurtosis of electromagnetic torque and a recovery strategy based on converting the state of pole-slipping into that of on-load startup are presented. Experimental results demonstrate that detecting slip anomalies without load-side information, and recovery from pole-slipping without auxiliary mechanical devices are both feasible.

Suggested Citation

  • Xiaowen Liao & Chris Bingham & Tim Smith, 2022. "Speed Control of Magnetic Drive-Trains with Pole-Slipping Amelioration," Energies, MDPI, vol. 15(21), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:8148-:d:959840
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