Performance investigation of multi-tooth flux-switching PM linear motor

Cai, Jiahong; Lu, Qinfen; Jin, Yong; Chen, Chuanyin; Ye, Yunyue

doi:10.1109/icems.2011.6073745

Cited by 19 publications

(10 citation statements)

References 7 publications

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“…FSMs can be classified into wounded field FSMs (WFFSMs), permanent magnet FSMs (PMFSMs) and hybrid excitation FSMs (HEFSM), the latter ones combining both field excitation coils and PMs as main flux sources [92]. Different linear FSM topologies have been developed [93], some of them include hybrid excitation, that is, combine three-phase windings and PMs [94,95]. PMFSMs are also being developed using ferrite PMs [96].…”

Section: Flux Switching Machines (Fsms)mentioning

confidence: 99%

Rare-earth-free propulsion motors for electric vehicles: A technology review

Riba

López-Torres

Romeral

et al. 2016

Renewable and Sustainable Energy Reviews

211

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Several factors including fossil fuels scarcity, prices volatility, greenhouse gas emissions or current pollution levels in metropolitan areas are forcing the development of greener transportation systems based on more efficient electric and hybrid vehicles. Most of the current hybrid electric vehicles use electric motors containing powerful rare-earth permanent magnets. However, both private companies and estates are aware of possible future shortages, price uncertainty and geographical concentration of some critical rare-earth elements needed to manufacture such magnets. Therefore, there is a growing interest in developing electric motors for vehicular propulsion systems without rare-earth permanent magnets. In this paper this problematic is addressed and the state-of-the-art of the electric motor technologies for vehicular propulsion systems is reviewed, where the features required, design considerations and restrictions are addressed.

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Section: Flux Switching Machines (Fsms)mentioning

confidence: 99%

Rare-earth-free propulsion motors for electric vehicles: A technology review

Riba

López-Torres

Romeral

et al. 2016

Renewable and Sustainable Energy Reviews

211

View full text Add to dashboard Cite

show abstract

“…Due to the structure traits, few choices on mechanical dimensions can be chosen for optimization to minimize the thrust ripple effectively [4][5][6]. Thus, more and more researchers have started to focus on new topology investigation, to get better performance such as good utility of assistant tooth [7], yokeless translator [8], multi-tooth structure [9], etc.. However, these methods have increased the difficulty of manufacturing, which will increase the fabrication cost.…”

Section: Introductionmentioning

confidence: 99%

New approach for thrust ripple reduction on permanent magnet flux-switching linear motor

Wang

2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

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Permanent magnet flux-switching linear motor (PMFSLM) has widely potential application for railway, servo, and electromagnetic launch device and so on. However, it suffers large thrust fluctuation and flux leakage, which brings ill influence to its output performance. In this paper, a novel topology with the back iron and permanent magnets placed above the mover is proposed. First, it analyzes the defects of traditional PMFLSM, such as large flux leakage, high thrust ripple. Then 2-D finite element algorithm (FEA) is applied on both traditional topology and the proposed one to get comparative performance analysis. Simulation results demonstrate that the new topology can get higher thrust, lower thrust ripple and less flux leakage in response to those of conventional structures.

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“…Therefore, it is good and convenient to optimize the rotor. For the cogging torque and torque ripple reduction of the FSPM, Reference [20] verifies that rotor tooth with odd number has lower cogging torque compared with the rotor tooth with even number; multi-tooth structure can reduce the cogging torque and torque ripple [21,22]; and rotor tooth shapes combined with stepped and notched technology can greatly reduce the cogging torque [23][24][25]. However, these methods may not be all effective for special structure motor, such as the modular motor.…”

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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Performance investigation of multi-tooth flux-switching PM linear motor

Cited by 19 publications

References 7 publications

Rare-earth-free propulsion motors for electric vehicles: A technology review

Rare-earth-free propulsion motors for electric vehicles: A technology review

New approach for thrust ripple reduction on permanent magnet flux-switching linear motor

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

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