The flux-reversal machine: a new brushless doubly-salient permanent-magnet machine

Deodhar, R.; Andersson, Sven Ingmar; Boldea, Ion; Miller, T.J.E.

doi:10.1109/28.605734

Cited by 266 publications

(95 citation statements)

References 4 publications

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“…Its simple structure makes it cost effective and suitable for mass production. It has the advantages of switched reluctance machine (SRM) and permanent magnet synchronous machine (PMSM) (Deodhar et al 1997).…”

Section: Flux Reversal Machinementioning

confidence: 99%

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Design and analysis of full pitch winding and concentrated stator pole winding three-phase flux reversal machine for low speed application

Kalluru

Fernandes

2008

Sadhana

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The flux reversal machine (FRM) is a doubly-salient stator permanent magnet machine with flux linkage reversal in the stator concentrated winding. The existing machines at low speed, low power (2·4 kW, 300 rpm) range are not economical. FRM topology is best suited for this application. An attempt has been made to improve the power density of machine by introducing full pitch winding. Full pitch winding FRM (FPFRM) has higher power density than the conventional concentrated stator pole winding FRM (CSPFRM).Design and comparative analysis of FPFRM and CSPFRM are made. Both machines are designed for 88·58 Nm and 300 rpm. Design details of both machines are presented. Finite Element Method (FEM) analysis is carried out to evaluate and compare the performance of CSPFRM and FPFRM. Series capacitive compensation is provided for better voltage regulation of both machines.Keywords. Flux reversal machine (FRM); full pitch winding; doubly salient permanent magnet electrical machine; finite-element method (FEM) analysis.

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Section: Flux Reversal Machinementioning

confidence: 99%

“…Single-phase FRM was first introduced by Deodhar et al (1997) for an automobile application to replace the standard claw pole alternator. It has numerous advantages such as simple construction, low inertia and high power density.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of full pitch winding and concentrated stator pole winding three-phase flux reversal machine for low speed application

Kalluru

Fernandes

2008

Sadhana

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“…Therefore, this kind of AL-PMSM cannot make full use of the PMs and increases the PMs cost. In recent years, flux reverse permanent-magnet machine (FRPM), double salient permanent-magnet machine (DSPM) and flux-switching permanent-magnet machine (FSPM) have been widely investigated due to the advantages of simple and robust rotor structure that is composed of cheap iron core with salient tooth [11][12][13][14][15]. Since the armature windings and the permanent magnets are both installed in the stator of these structures, they can protect the PMs from sliding off caused by centrifugal force and from demagnetizing caused by the heat dissipation difficulties.…”

Section: Introductionmentioning

confidence: 99%

Torque Ripple Reduction of a Novel Modular Arc-Linear Flux-Switching Permanent-Magnet Motor with Rotor Step Skewing

Liu

Zhao

2016

Energies

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Abstract:A novel modular arc-linear flux-switching permanent-magnet motor (MAL-FSPM) used for scanning system instead of reduction gearboxes and kinematic mechanisms is proposed and researched in this paper by the finite element method (FEM). The MAL-FSPM combines characteristics of flux-switching permanent-magnet motor and linear motor and can realize the direct driving and limited angular movement. Structure and operation principle of the MAL-FSPM are analyzed. Cogging torque model of the MAL-FSPM is established. The characteristics of cogging torque and torque ripple are investigated for: (1) distance (d end ) between left end of rotor and left end of stator is more than two rotor tooth pitch (τ p ); and (2) d end is less than two rotor tooth pitch. Cogging torque is an important component of torque ripple and the period ratio of the cogging torque to the back electromotive force (EMF) equals one for the MAL-FSPM before optimization. In order to reduce the torque ripple as much as possible and affect the back EMF as little as possible, influence of period ratio of cogging torque to back EMF on rotor step skewing is investigated. Rotor tooth width and stator slot open width are optimized to increase the period ratio of cogging torque to back EMF. After the optimization, torque ripple is decreased by 79.8% for d end > τ p and torque ripple is decreased by 49.7% for d end < τ p . Finally, 3D FEM model is established to verify the 2D results.Keywords: modular arc-linear flux-switching permanent-magnet motor (MAL-FSPM); cogging torque; torque ripple; harmonics; period ratio of cogging torque to back electromotive force (EMF); rotor step skewing; finite element method (FEM)

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“…Also, by using the interior-type PMM, a complex algorithm is needed for the reluctance torque component as well as magnetic torque component. Under this background, researchers have attempted to combine the merits of SRM and PMM, leading to propose a new machine structure as Flux Reversal Motor (FRM), which has a simple structure and low rotor inertia, for low cost and high speed applications [6].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Flux-Reversal Motors with Six-Switch and Four-Switch Converters

Kang¹,

Lee²,

Kim³

2013

Journal of Magnetics

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In this paper, the 6-switch inverter for the Flux-Reversal Motor (FRM) has been presented and compared to the 4-switch inverter for the FRM, which is more popular in cost effective applications. To analyze the FRM, we adopted the two-dimensional time-stepped voltage source finite element method (FEM) that uses the actual pulse width modulation (PWM) voltage waveforms as the input data. As the FRM characteristic analysis of actual pwm voltage input, the torque ripples and iron losses (eddy current and hysteresis loss) of the FRM can be precisely calculated. With the simulated and experimental results, the performance and limitations of the 4-switch FRM which is the cost effective drive compared to the 6-switch FRM drive are provided in more detail.

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The flux-reversal machine: a new brushless doubly-salient permanent-magnet machine

Cited by 266 publications

References 4 publications

Design and analysis of full pitch winding and concentrated stator pole winding three-phase flux reversal machine for low speed application

Design and analysis of full pitch winding and concentrated stator pole winding three-phase flux reversal machine for low speed application

Torque Ripple Reduction of a Novel Modular Arc-Linear Flux-Switching Permanent-Magnet Motor with Rotor Step Skewing

Comparative Analysis of Flux-Reversal Motors with Six-Switch and Four-Switch Converters

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