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An Improved Control Strategy to Reduce Torque Spikes and Ripple for Bearingless Switched Reluctance Motors

Lookup NU author(s): Dr Xu DengORCiD

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Abstract

IEEEDirect torque control, direct instantaneous torque control (DITC), and direct force control strategies have been well applied in bearingless switched reluctance motors (BSRMs), which can obtain good torque and levitation characteristics by hysteresis-loop control method. However, hysteresis-loop control method can result in torque ripple due to loop width, which increases the rms currents. On the other hand, commutation at the maximum inductance can result in torque spikes, which can deteriorate the commutation process. Therefore, this article proposes an improved control strategy to further reduce torque spikes and ripple for BSRMs. In the proposed strategy, the torque sharing function is investigated to make torque transition smoother. Moreover, model predictive control (MPC) method is employed to replace the hysteresis loop, which reduces the torque ripple and reduces the rms currents. At the same time, torque—ampere ratio can be improved as well.

Publication metadata

Author(s): Yu Q, Cao X, Deng X, Zhu T, Deng Z, Liu C

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Industrial Informatics

Year: 2024

Volume: 20

Issue: 4

Pages: 5147-5159

Print publication date: 01/04/2024

Online publication date: 21/11/2023

Acceptance date: 11/10/2023

ISSN (print): 1551-3203

ISSN (electronic): 1941-0050

Publisher: IEEE Computer Society

URL: https://doi.org/10.1109/TII.2023.3326529

DOI: 10.1109/TII.2023.3326529

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