Improved Control Strategy for Fault-Tolerant Flux-Switching Permanent-Magnet Machine Under Short-Circuit Condition

Wang, Yu; Geng, Liang; Hao, Wenjuan; Xiao, Wenyan

doi:10.1109/tpel.2018.2859369

Cited by 10 publications

(7 citation statements)

References 25 publications

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“…It should be noted that all speed controllers have the same PI parameters. The fault-tolerant currents in double-phase fault operation are larger than that in healthy operation, and they are in consistent with (6), (8), (10) and (12). The short-circuit currents have quite different variation tendency from healthy phase currents.…”

Section: B Dynamic Performancesupporting

confidence: 78%

“…When adjacent-phase short-circuit faults occur in phase-C and phase-D, the amplitudes of phase-C and phase-D currents also enlarge suddenly and then attenuates in exponent to constant value later. The amplitude of phase-A current becomes much bigger, but it is in accordance with the sum of (10) and (12). Fortunately, the pulsating torque caused by the fault is restrained, and the torque ripples are almost the same as that in healthy operation.…”

Section: A Torque Fluctuations Cancellationsupporting

confidence: 52%

“…However, the controller design is challenging due to the time-varying references. Some FTC strategies were adopted to improve the torque performance of multi-phase motor with open-circuit or short-circuit fault combined with direct torque control (DTC) [10]- [12]. However, they suffer from DTC drawbacks.…”

Section: Introductionmentioning

confidence: 99%

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Unified Decoupling Vector Control of Five-Phase Permanent-Magnet Motor With Double-Phase Faults

Cheng

Zhou

Wang³

2020

IEEE Access

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Multi-phase permanent-magnet (PM) motor is a competitive candidate for application where uninterrupted operation is demanded under fault condition. However, double-phase open-circuit or short-circuit faults result in serious problems, such as high fluctuating-torque, deteriorated dynamic performance, even breakdown. This paper proposes a novel unified decoupling vector control strategy to restrain torque fluctuations and improve dynamic performance for a five-phase PM motor with arbitrary double-phase failures. The novelty of the proposed strategy is the development of reduced-order orthogonal transformation matrices and remedies voltages, and then the smooth operation with vector control strategy can be achieved under double-phase open-circuit or short-circuit fault condition. The decoupled motor model in the synchronous rotating frame is achieved by the combination of the reduced-order orthogonal transformation matrices deduced from the optimal fault-tolerant currents and the remedy voltages. The torque fluctuations cancellation is achieved by the remedy voltages. This control strategy exhibits the improved dynamic performance with smooth torque of the faulty PM motor. The experimental results are presented to verify the feasibility of the proposed strategy. INDEX TERMS Five-phase permanent-magnet motor, fault-tolerant control, reduced-order orthogonal transformation matrix, remedy voltage, double-phase faults, vector control.

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Section: B Dynamic Performancesupporting

confidence: 78%

Section: A Torque Fluctuations Cancellationsupporting

confidence: 52%

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Unified Decoupling Vector Control of Five-Phase Permanent-Magnet Motor With Double-Phase Faults

Cheng

Zhou

Wang³

2020

IEEE Access

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“…Digital Object Identifier 10.30941/CESTEMS.2020.00012 acronym stator-PM machine has been developed, which exhibit or present a higher power density and a higher level of mechanical integrity as the merit of the design. However, it is worthy to highlight that the switched-flux PM machine can be considered among the novel concept of an electrical machine design that offers unique superiorities over its counterpart, the conventional designed rotor-PM synchronous machine of which some of the merits pointed out is high output torque density, enhanced rotor robustness, and better efficiency [3], [4]. Nevertheless, the main economic limitation of the SFPM machines is their comparatively weaker PM usage or utilization [4].…”

Section: Introductionmentioning

confidence: 99%

A new fault-tolerant switched flux machine with hybrid permanent magnets

Chen

Eduku

Zhao

2020

Trans. Electr. Mach. Syst.

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This paper put forward a new fault-tolerant hybrid switched-flux PM (HSFPM) machine design employing the synergy of NdFeB and Ferrite Magnet. The key of the proposed HSFPM designed machine is the unique design E-core laminated stator with the hybrid magnet to ensure a drastic reduction of NdFeB magnet without compromising the output performances and efficiency in the conventional SFPM machine design to avert the huge demand of NdFeB and its associated volatile high price increase. Additionally, the fault-tolerant stator teeth designed principle implemented in the proposed HSFPM machine provides enhanced segregation among the various phases and ensures continuity of operation with acceptable operating performance under fault-condition. For fair evaluation and comparison, both the proposed HSFPM and the conventional SFPM (CSFPM) machine have the same slot-pole combination, winding arrangements, and stator/rotor dimensions except for the unique outer-stator of the proposed design. Meanwhile, compared to the CSFPM machine, the proposed HSFPM machine design makes use of only 60% of the PM (NdFeB) length. Finally, the evaluation of the no-load in conjunction with the load condition performances was carefully investigated by the Finite Element Method (FEM) of the ANSYS Maxwell software. The results depicted that the proposed HSFPM exhibits similar sinusoidal back electromotive force, comparable output torque, and slightly higher efficiency compared to that of the CSFPM machine.

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“…FSPMs can be treated as one of the newest concepts of electrical machines that offer special superiorities over the conventional rotor-PM synchronous machines (RPMSMs), such as higher torque density, better efficiency, and rotor robustness. Furthermore, their fault-tolerant capabilities are superior to the conventional fault-tolerant RPMSMs [7]. However, economic issues are the main limitation of FSPMs because of their relatively weak PM utilisation.…”

Section: Introductionmentioning

confidence: 99%

Performance modifications and design aspects of rotating flux switching permanent magnet machines: a review

Nobahari

Aliahmadi

Faiz

2019

IET Electric Power Applications

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Permanent magnet flux switching machines (FSPMs) have attracted considerable attention in recent years, due to their outstanding characteristics to operate as brushless AC drives. Since they are relatively new, there are particular challenges not only for their design procedure but also for their operating principle comprehension. This study highlights several issues on FSPMs from the basic operation description to their key design points. After a comprehensive description of FSPMs working principles, a detailed discussion is presented on their armature winding design. In addition, this study reviews various methods for their performance modification, including torque profile, electromotive force, and loss characteristics. This study also surveys field regulation technologies, modelling and design optimisation methods applied to FSPMs along with their fabrication and cost issues.

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Improved Control Strategy for Fault-Tolerant Flux-Switching Permanent-Magnet Machine Under Short-Circuit Condition

Cited by 10 publications

References 25 publications

Unified Decoupling Vector Control of Five-Phase Permanent-Magnet Motor With Double-Phase Faults

Unified Decoupling Vector Control of Five-Phase Permanent-Magnet Motor With Double-Phase Faults

A new fault-tolerant switched flux machine with hybrid permanent magnets

Performance modifications and design aspects of rotating flux switching permanent magnet machines: a review

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