Analysis of a Novel Consequent-Pole Flux Switching Permanent Magnet Machine With Flux Bridges in Stator Core

Gao, Yuting; Li, Dawei; Qu, Ronghai; Fang, Haiyang; Ding, Han; Jing, Libing

doi:10.1109/tec.2018.2839727

Cited by 41 publications

(22 citation statements)

References 30 publications

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“…The back EMF obtained in the wye mode divided by the back EMF obtained in the wye-delta mode gives the flux weakening ratio ( ). From (12) and (13), this ratio is given as:…”

Section: = −mentioning

confidence: 99%

Wide-Speed Range Operation of PM Vernier Machines Using Wye and Wye-Delta Winding Configurations

2020

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This paper proposes two permanent magnet vernier machines (PMVM) operation modes, for wide-speed and high efficiency operation. In mode-1, the machine operates as a conventional PMVM with a wye connected stator winding mode. In mode-2, the machine stator winding is switched to a wye-delta winding mode. Contrary to the existing dual-inverter PMVM topology with two additional bidirectional thyristor switches, the proposed topology utilizes a single inverter with six additional bidirectional thyristor switches to change mode. A theoretical discussion of the proposed idea is further verified via finite element analysis (FEA) simulations. The basic electromagnetic characteristics, such as the flux linkage, back electromotive force, torque, and phase voltages of the machine are investigated using wye and wye-delta stator winding configurations, and subsequently, compared with the existing topology that used a dualinverter PMVM. The FEA results show that the proposed PMVM has low overall losses, consequently resulting in improved efficiency compared to the existing topology. The speed increases by almost 9 times using the proposed single-inverter PMVM. Transient analysis using FEA is also conducted in this paper. INDEX TERMS High-efficiency, permanent magnet vernier machine, wide-speed range, wye-delta mode switching.

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“…The back EMF obtained in the wye mode divided by the back EMF obtained in the wye-delta mode gives the flux weakening ratio ( ). From (12) and (13), this ratio is given as:…”

Section: = −mentioning

confidence: 99%

Wide-Speed Range Operation of PM Vernier Machines Using Wye and Wye-Delta Winding Configurations

2020

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“…Consequent pole PMFSM (as shown in Fig. 2 a ) is proposed [24] which compensate leakage flux but utilise high PM volume which result in high cogging torque, high torque ripples, high vibration and acoustic noise.…”

Section: Introductionmentioning

confidence: 99%

Analytical validation of novel consequent pole E‐core stator permanent magnet flux switching machine

Ullah

Khan

Sulaiman

et al. 2020

IET Electric Power Applications

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Flux switching machines (FSMs) encompass unique features of conventional direct current machine, permanent magnet (PM) synchronous machine and switch reluctance machine. Permanent magnet FSM (PMFSM) is capable of high torque density and applicable for high-speed application, however conventional PMFSM exhibits demerits of high PM volume, high torque ripples and significant stator flux leakage. In this paper, a novel consequent pole E-core stator PMFSM is proposed and compared with conventional topology utilising 2D finite-element analysis (2D-FEA). Finite-element analysis revealed that proposed design enhanced flux modulation effects by introducing flux bridges and flux barriers as a result reduced cogging torque by reducing 46.53% of the total PM volume, reduce torque ripples by reducing PM slot effects and reduce flux leakage utilising flux bridges in the stator. Furthermore, analytical model for flux linkages, cogging torque, mechanical torque, no load and on-load magnetic flux density (MFD) is developed for initial design of conventional and proposed model. 2D analytical methodologies resolve equivalent magnetic circuits for open-circuit flux linkages, Fourier analysis for cogging torque, Laplace equations for MFD and Maxwell stress tensor for mechanical torque. Finally, results obtained from 2D-FEA and analytical methodologies are validated and compared.

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“…Hence, FSPM gear ratio can be increased with the decrement of rotor iron pole number. FSPMs utilizing high gear ratio were proposed in previous works [8,9]. For example, the combination of 12S7P was used to have a high gear ratio of 7 [8].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, flux bridges were added in a stator core to address the flux bypass issue and understand the high gear ratio FSPM. However, due to its strong armature reaction, it had a low power factor, as mentioned in [9].…”

Section: Introductionmentioning

confidence: 99%

High Gear Ratio Flux Switching Permanent Magnet Machine for High Torque Performance

2020

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A high gear ratio flux switching permanent magnet machine (HFSPM) was proposed to improve the torque performance in flux switching permanent magnet machine (FSPM). Conventional FSPMs address flux bypass issue when designed with a high gear ratio. The HFSPM adopts a dual rotor structure to overcome this flux bypass issue. First, the cause and effect of flux bypass issue was discussed using a magnetic equivalent circuit (MEC). Further, the process of overcoming the flux bypass issue using dual rotor structure was discussed. An alternative HFSPM, consequent pole HFSPM (CP-HFSPM), was proposed to enhance torque performance. The CP-HFSPM was optimized for high torque performance and proper power factor.

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Analysis of a Novel Consequent-Pole Flux Switching Permanent Magnet Machine With Flux Bridges in Stator Core

Cited by 41 publications

References 30 publications

Wide-Speed Range Operation of PM Vernier Machines Using Wye and Wye-Delta Winding Configurations

Wide-Speed Range Operation of PM Vernier Machines Using Wye and Wye-Delta Winding Configurations

Analytical validation of novel consequent pole E‐core stator permanent magnet flux switching machine

High Gear Ratio Flux Switching Permanent Magnet Machine for High Torque Performance

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