Permanent magnet flux switching integrated-starter-generator with different rotor configurations for cogging torque and torque ripple mitigations

Fei, W.; Luk, P.C.K.; Xia, Binyuan; Wang, Y.; Shen, Jian‐Xin

doi:10.1109/ecce.2010.5618119

Cited by 23 publications

(30 citation statements)

References 27 publications

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“…Various techniques have been published to reduce the cogging torque on both radial-type [52À54] and axial-type PM SFM [55], left vacant space in the area of SFWFMs, as all the designed discussed above have cogging torque especially single phase SFWFMs which have high cogging torque, discussed in [38]. Rotors with stepped skew [56,57] should be adopted in future to reduce the cogging torque and torque ripple under various load conditions. Various kinds of notching schemes [58,59] are also available for cogging torque reduction.…”

Section: Cogging Torquementioning

confidence: 99%

Review of Switched Flux Wound-Field Machines Technology

Khan

Sulaiman

Ahmad

2016

IETE Technical Review

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This paper explains the state of art of switched flux wound-field machines (SFWFMs). The main advantage of these SFWFMs when compared with induction machines, synchronous machines, direct current machines, etc. is that all the active parts such that armature coil and field excitation coil are located on the stator while the rotor part consists of only iron material without windings. This makes the machine more robust, simple structure, and more suitable to be used for high-speed applications, compared to induction machine which has low mechanical strength, less torque desnity, and low power factor. Theories, numerical and technical literature of different SFWFM are described and analysed. Merits and demerits of different SFWFM structure are discussed. This paper categorized SFWFM topologies on the basis of their structure, flux linkage, cogging torque, average torque, and efficiency.

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Section: Cogging Torquementioning

confidence: 99%

Review of Switched Flux Wound-Field Machines Technology

Khan

Sulaiman

Ahmad

2016

IETE Technical Review

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“…The torque reaches its maximum value at around inner power factor angle of 15°. By the principle of virtual displacement, the electromagnetic torque Tem of the FSPM machine can be derived by co-energy [23], the Wcoenergy can be expressed as:…”

Section: Torque Analysismentioning

confidence: 99%

“…Optimizing the rotor structure is however a favorable method for FSPM machines. Rotors with stepped skew were adopted in [22,23] to reduce the cogging torque and torque ripple under various load conditions. Various kinds of notching schemes and their influence on cogging torque are evaluated in [24,25].…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Rotor Teeth Shapes on the Performance of Flux Switching Permanent Magnet Machines Used for Electric Vehicles

Zhao

Yan

et al. 2014

Energies

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This paper investigated a 12-slot/11-pole flux switching permanent magnet (FSPM) machine used for electric vehicles (EVs). Five novel rotor teeth shapes are proposed and researched to reduce the cogging torque and torque ripple of the FSPM machine. These rotor teeth shapes are notched teeth, stepped teeth, eccentric teeth, combination of notched and stepped teeth, and combination of notched and eccentric teeth. They are applied on the rotor and optimized, respectively. The influences of different rotor teeth shapes on cogging torque, torque ripple and electromagnetic torque are analyzed by the 2-D finite-element method (FEM). Then, the performance of FSPMs with different rotor teeth shapes are compared and evaluated comprehensively from the points of view of cogging torque, torque ripple, electromagnetic torque, flux linkage, back electromotive force (EMF), and so on. The results show that the presented rotor teeth shapes, especially the combination of stepped and notched teeth, can greatly reduce the cogging torque and torque ripple with only slight changes in the average electromagnetic torque.

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“…Since the magnetic saturation exists in the stator and rotor iron cores, it is unfeasible to make decomposition of the output torque by co-energy calculation [13]. The 3-D FEA is used to investigate torque characteristics in this paper.…”

Section: Torquementioning

confidence: 99%

Novel Fault-Tolerant Design of Axial Field Flux-Switching Permanent Magnet Machine

Zhang

Lin

et al. 2014

IEEE Trans. Appl. Supercond.

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Axial field flux-switching permanent magnet machine (AFFSPMM) has significant advantages, such as the short axial size and high torque density. It is suitable for the direct drive in-wheel applications for the electric and hybrid electric vehicles. For improving the reliability, a novel fault-tolerant structure is applied in the AFFSPMM. The stator is composed of E-shaped laminated segments. The phase windings are physically isolated to each other by the middle teeth of E-shaped cores. The field windings wounded around the middle teeth are used to regulate air-gap flux in the proposed machine. The electromagnetic performances are investigated and analyzed by three-dimensional finite element method (FEM), including the inductance, the back-EMF, and the torque capability, etc. It is shown that the fault tolerance is improved in the novel AFFSPMM, and a wide speed range of operation can be attained by a small DC field current.

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Permanent magnet flux switching integrated-starter-generator with different rotor configurations for cogging torque and torque ripple mitigations

Cited by 23 publications

References 27 publications

Review of Switched Flux Wound-Field Machines Technology

Review of Switched Flux Wound-Field Machines Technology

Influence of Different Rotor Teeth Shapes on the Performance of Flux Switching Permanent Magnet Machines Used for Electric Vehicles

Novel Fault-Tolerant Design of Axial Field Flux-Switching Permanent Magnet Machine

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