A novel axial flux segmented SRM for electric vehicle application

Madhavan, Rajmohan; Fernandes, B. G.

doi:10.1109/icelmach.2010.5608140

Cited by 33 publications

(26 citation statements)

References 8 publications

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“…But, SSRM employs full pitch winding which results in high conduction losses. In order to reduce these losses, axial flux SSRM with toroidal winding is proposed in [1]. This machine is a three-phase, 12/8 pole single-stator, dual-rotor axial flux segmented rotor SRM.…”

Section: Introductionmentioning

confidence: 99%

A novel technique for minimizing torque ripple in axial flux segmented rotor SRM

Madhavan

Fernandes

2011

2011 IEEE Energy Conversion Congress and Exposition

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Axial flux machine is an attractive option for inwheel electric vehicle (EV) application, which requires high ratio of outer diameter to axial length. Further, utilization of lamination material in axial flux machines is better than that of radial flux machines. In order to reduce cost, magnet-less machines are desirable. In view of all these factors a singlestator, dual-rotor, three-phase axial flux segmented rotor switched reluctance motor (AFSSRM) with toroidal windings was recently proposed [1]. It was observed that torque ripple is high in this machine. In this paper, a simple and effective technique to reduce torque ripple in AFSSRM is proposed. Two rotors of AFSSRM are circumferentially displaced with respect to each other. It is analytically proved that torque ripple can be reduced using this technique. This is also verified by finite element method (FEM) analysis based simulation studies. It is observed that the torque ripple is reduced by 54.6%. Effect of rotor displacement on axial attraction forces is also discussed.

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Section: Introductionmentioning

confidence: 99%

A novel technique for minimizing torque ripple in axial flux segmented rotor SRM

Madhavan

Fernandes

2011

2011 IEEE Energy Conversion Congress and Exposition

Self Cite

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“…In-wheel motors for electric vehicle (EV) application is a hot topic among researchers due to environmental concerns [1]. It greatly simplify the mechanical part of the electric vehicle.…”

Section: Introductionmentioning

confidence: 99%

Field-Circuit Coupled Analysis of an In-Wheel Switched Reluctance Motor with Outer Rotor for EV Applications

Chen¹,

Liu²,

Zhao³

et al. 2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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Abstract. Switched reluctance motor (SRM) is potential to be applied in electric vehicle as an in-wheel drive motor because of its unique feature, such as being allowed to operate in a wide speed range with high efficiency. In this paper, a field-circuit coupled dynamic model is developed with 2D finite element method in Maxwell being proposed to compute the performances of a 10kW/800rpm SRM using the angle position control (APC) strategy. The nonlinear magnetization characteristics have been considered and calculated by FEA. The magnetic fields, windings current, the electromagnetic torque and the terminal characteristics of the prototype SRM are investigated. IntroductionIn-wheel motors for electric vehicle (EV) application is a hot topic among researchers due to environmental concerns [1]. It greatly simplify the mechanical part of the electric vehicle. In last decades, both radial and axial flux permanent magnet (PM) motors are widely used in most of the in-wheel applications [2,3,4]. PM motors offer the highest torque density and therefore will potentially have the lowest weight for given torque and power rating. However, fixed flux magnets limit the speed range of the motor, and there are the dangers of demagnetization phenomenon in permanent magnets. The induction and switched reluctance motors, which have similar torque density, have also been used as in-wheel drive motors [5,6].Comparing with other motors, SRM is potential to apply in EV applications on account of its simple and reliable structure. SRM enjoys flexible control, high efficiency in a wide range of speed, and easy implementation of four-quadrant operation, which is much more important for improvement of electric vehicle performance [7].However, due to the double salient structure of the SRM, the non sinusoidal currents and the magnetic saturation in the motor core during motor operation, the simple and unified mathematical model and analytical equation can not be get easily [8]. The finite element method is a kind of discrete mathematics method which is based on the magnetic field analysis, the SRM model can be precisely built by the method, the SRM performance can be comprehensively and systematically analyzed [9].In this paper, a new field-circuit coupled finite element method by using Maxwell is developed to simulate a 3-phase, 12/8 pole, 10kW/800rpm SRM and its control system. The magnetic fields distribution, the torque, the currents of the SRM with outer rotor are presented.

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“…In-wheel AFPM [12] Segmented AFVRM [9] In-wheel AFPM [13] The machine of this study has the second lowest torque density. However, the excessively large average torque from simulation is used for comparison even though the nominal torque is much less.…”

Section: Comparison To Other Machine Designsmentioning

confidence: 81%

“…Axial flux machines are especially valuable in electric vehicles. They are superior to radial flux machines due to a higher power density and greater utilization of lamination material [9].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of A Novel Axial Flux Variable Reluctance Machine

Hines

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The objective of this thesis is to determine the feasibility of a novel axial flux variable reluctance machine design. The design aims to compete with prevalent rare-earth permanent magnet machines while also implementing an innovative torque ripple minimization strategy. Given the fundamental operating principles, a selection of dimensions, materials, and excitations are prepared for the machine. Special attention is given to the rotor profile which is crucial to operation. Finite element analysis software is used to evaluate a three-dimensional model in terms of inductance and torque. The ultimate potential of the machine is discussed and recommendations for improvement are proposed.Index terms -Reluctance machine, axial flux, torque ripple, finite element analysis v ACKNOWLEDGEMENTS

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A novel axial flux segmented SRM for electric vehicle application

Cited by 33 publications

References 8 publications

A novel technique for minimizing torque ripple in axial flux segmented rotor SRM

A novel technique for minimizing torque ripple in axial flux segmented rotor SRM

Field-Circuit Coupled Analysis of an In-Wheel Switched Reluctance Motor with Outer Rotor for EV Applications

Evaluation of A Novel Axial Flux Variable Reluctance Machine

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