Influence of rotor iron bridge position on DC-winding-induced voltage in wound field switched flux machine having partitioned stators

Wu, Zhongze; Zhu, Z. Q.; Wang, Chao; Wang, Hua; Wang, Kai; Zhang, Wentao

doi:10.23919/cjee.2021.000022

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…The reduction techniques are modifying the equivalent airgap length and pole geometry potentially leading to changes in the torque characteristics. Applying the constraint of maintaining the output torque greater than 90% of the initial value indicates a trade-off between reducing the undesirable effects of the DC winding induced voltage and preserving the motor's torque performance [37,39,42,45]. While performing the optimization of the reduction techniques, the significant reduction in DC winding induced voltage and cogging torque is achieved up to 74% and 72%, respectively, while the average electromagnetic torque is maintained greater than 90% of its initial value.…”

Section: Reduction Of DC Induced Voltagementioning

confidence: 99%

“…Then, analysis of the DC induced voltage is extended to the HEFS machines [39]- [41]. Another model of the WFFS machine [42] is investigated in terms of the DC induced voltage mechanism but this design has a complex structure of the partitioned stator with an iron bridge. In [43], WFFS machines having the complex structure of partitioned stator are investigated and dual three-phase windings are introduced to limit the DC induced voltage.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Open Circuit DC Winding Induced Voltage Reduction Techniques in Five Phase Non-Overlapped Wound Field Flux Switching Machines

Yousuf,

Khan,

Tameemi

et al. 2024

IEEE Access

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The induced voltage pulsation in DC winding can generate various issues in five phase wound field flux switching (WFFS) machine such as DC current ripples, unsteady field excitation, deteriorates the DC power source and challenges for control performance of machine. In this paper, the simplest five phase WFFS machine having the 5 stator slots with 7, 6, 4 and 3 rotor poles are analyzed and investigated for open circuit DC winding induced voltage. The phenomena of the DC winding induced voltage is briefly analyzed and explained. Three reduction techniques i.e., rotor pole chamfering, rotor pole arc optimization and rotor pole axial pairing, are investigated and optimized to reduce the open circuit DC winding induced voltage and cogging torque for WFFS machine while the average electromagnetic torque is kept greater than 90% of its initial value. The Finite Element (FE) results show that the reduction achieved in peak-to-peak value of open circuit DC winding induced voltage is 70.84%, 73.65%, 70.13%, and 63.42% by performing the rotor pole chamfering for the five phase WFFS machine having the 7, 6, 4, and 3 pole rotors, respectively. For rotor pole arc optimization, DC winding induced voltage peak to peak value is effectively reduced to 60.18%, 74.91%, 64.74%, and 64.10% for the 7, 6, 4, and 3 rotor-poles machines, respectively, while its reduction for axially paired rotors is 42.70%, 68.05%, 68.64%, and 56.09%, respectively. The 5-statorpole/6-rotor-pole five phase non-overlapped WFFS machine with the initial rotor, chamfered rotor, optimized rotor, and axially paired rotor are prototyped to validate the FE results. INDEX TERMSDC windings, five phase, induced voltage, open circuit, wound field flux switching, rotor pole shaping and optimization, rotor pole axial pairing.

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Section: Reduction Of DC Induced Voltagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Open Circuit DC Winding Induced Voltage Reduction Techniques in Five Phase Non-Overlapped Wound Field Flux Switching Machines

Yousuf,

Khan,

Tameemi

et al. 2024

IEEE Access

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“…Special attention has been paid to the reduction of the cogging torque considering the PM chamfering technique. In [11], Wu et al investigated a dual stator single rotor DC-excited FSPMM. It is equipped with an armature in the outer stator and a field in the inner one.…”

Section: Introductionmentioning

confidence: 99%

On the Analysis and Torque Enhancement of Flux-Switching Permanent Magnet Machines in Electric Power Steering Systems

Abdelkefi

Souissi

Abdennadher

et al. 2022

WEVJ

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Modern road vehicles are more and more often being equipped with electric actuators. These are intended to play critical roles in passengers comfort and safety. Among the electrified components onboard road vehicles, one can distinguish electric power steering (EPS) systems, which have been the subject of intensive investigations covering both design and control aspects. The abilities of several AC motor topologies to fulfil the EPS systems’ requirements have been assessed by a large scientific community in both academia and industry. The present work was aimed at the prediction of the electromagnetic features of the flux-switching permanent magnet machines (FSPMMs), with an emphasis on the air gap flux density. The latter was firstly formulated while neglecting the slotting effect at both sides of the air gap. Then, stator and rotor permeance functions, taking into account the slotting effect and the PM flux concentrating arrangement, were incorporated into the derived flux density spatial repartition. Moreover, the accuracy of the latter was improved through two dedicated correction functions that take into account the rotor position and the magnetic saturation. The last part of the paper presents a simple approach to enhance the developed torque of FSPMMs in an attempt to meet the EPS requirements.

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Winding-MMF-based design and investigation of dual-winding hybrid-tooth vernier permanent magnet motor with reduced torque ripple and improved power factor

Shan,

Fan,

Zhu

et al. 2024

AIP Advances

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In this paper, in order to further reduce torque ripple and improve power factor, a new vernier permanent magnet motor is proposed, in which the design concept of dual-winding hybrid-tooth configuration is incorporated. In order to clarify motor torque ripple and power factor, the winding-magnetomotive-force-based design and analysis method is proposed, in which harmonic characteristics are considered as key factors during the magnetic field modulation process. The relationship between harmonics generated by winding MMF, torque ripple, and power factor are investigated. In addition, the split-tooth vernier permanent magnet motor is also investigated as a referenced motor. Detailed comparisons between the DWHT-VPM motor and ST-VPM motor are carried out, including air gap magnetic field, torque, and power factor. Both theoretical and simulation results verify the reasonability of the proposed DWHT-VPM motor, and the effectiveness of the proposed winding-MMF-based analysis method, which provide a new potential research path for the design and analysis of flux modulation motors.

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Influence of rotor iron bridge position on DC-winding-induced voltage in wound field switched flux machine having partitioned stators

Cited by 5 publications

References 21 publications

Investigation of Open Circuit DC Winding Induced Voltage Reduction Techniques in Five Phase Non-Overlapped Wound Field Flux Switching Machines

Investigation of Open Circuit DC Winding Induced Voltage Reduction Techniques in Five Phase Non-Overlapped Wound Field Flux Switching Machines

On the Analysis and Torque Enhancement of Flux-Switching Permanent Magnet Machines in Electric Power Steering Systems

Winding-MMF-based design and investigation of dual-winding hybrid-tooth vernier permanent magnet motor with reduced torque ripple and improved power factor

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