An improved sliding-mode observer-based equivalent-input-disturbance approach for permanent magnet synchronous motor drives with faults in current measurement circuits

Huang, Gang; Huang, Wei; Li, Zhengtan; Li, Jiajun; He, Jing; Zhang, Changfan; Zhao, Kaihui

doi:10.1177/01423312211002584

Cited by 5 publications

(1 citation statement)

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“…Indeed, sensor faults, such as a bias in one of the five phase current sensors or speed sensors, can lead to the controller producing undesirable control actions, inducing serious consequences, such as important torque oscillations [26]. Recently, various fault diagnosis methods of current sensors have been presented.…”

Section: Introductionmentioning

confidence: 99%

Sliding-Mode-Based Current and Speed Sensors Fault Diagnosis for Five-Phase PMSM

et al. 2021

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The present paper deals with an active fault-tolerant speed tracking of a five-phase permanent magnet synchronous motor with currents and speed sensor failures. The active fault tolerant control scheme, integrating a sliding mode observer and backstepping controllers, is proposed to provide a continuous drive operation of the five-phase permanent magnet synchronous motor, even during more than one sensor fault occurrence. The sliding mode observer is designed to generate the residual signal necessary for the detection stage, whereas speed and current backstepping controllers handle the operation of the five-phase permanent magnet synchronous motor thanks to their ability to consider the nonlinearities of the system model in generating a control law that is robust enough in healthy and faulty cases. Furthermore, the FTC strategy uses the information received from the fault-tolerant switching block in terms of the measured and the observed currents and speed signals. To gain the maximum benefit of the sliding mode observer’s robustness to random noises and its ease of implementation, the observed currents and speed of the five-phase permanent magnet synchronous motor have been estimated. The simulation results are conducted to show the effectiveness of the proposed FTC control scheme and to prove its high performance in fault detection and tolerant control for the five-phase permanent magnet synchronous motor, since it significantly outperforms the performance provided by traditional methods.

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Section: Introductionmentioning

confidence: 99%