On the sizing of the PM excitation of a hybrid claw pole alternator

Ibala, Amina; Masmoudi, Ahmed

doi:10.1109/ever.2016.7476417

Cited by 3 publications

(2 citation statements)

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“…Actually, many different technical designs of hybrid excited machines, including claw pole and cylindrical machines with permanent magnets, are described in literature (Paplicki et al , 2015; Di et al , 2016; Guo et al , 2009; Jack et al , 1997; Guo et al , 2003; Zhang et al , 2016; Leroy and Foveau, 2013; Melcescu et al , 2012; Burkhardt et al , 2014; Aydin et al , 2002; Dajaku et al , 2016; Ibala and Masmoudi, 2016; Elloumi et al , 2015; Zhu et al , 2015; Rebhi et al , 2011). Several claw pole machines mentioned above have some serious limitations – the excitation flux is not controllable (Guo et al , 2009; Jack et al , 1997; Guo et al , 2003; Zhang et al , 2016), introducing special areas within the machine to limit the magnetic flux leakage is required (Leroy and Foveau, 2013) or construction of the machine is very complicated (Melcescu et al , 2012; Burkhardt et al , 2014).…”

Section: Introductionmentioning

confidence: 99%

Torque and back-emf in hybrid excited claw pole generator

Wardach

2018

COMPEL

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Purpose The paper aims to present the hybrid excited claw pole generator design, simulation and experimental results. The prototype has claw poles on two rotor sections, between which an excitation coil is located. The innovation of this machine is permanent magnets location on claws of one part of the rotor. The paper presents construction of the machine and analysis of the current in the excitation control coil influence on the electromagnetic torque, cogging torque and back-emf values. Presented studies enabled the determination of the torque and the back-emf for both: the strengthening and the weakening of magnetic field. Design/methodology/approach In the study, finite element analysis was used to perform simulation research. Then, based on the simulation studies, an experimental model was built. The paper also presents selected experimental results. Findings Achieved results show that the proposed machine topology allows to eliminate the disadvantages mentioned in paper, i.e. necessary to introduce special areas inside the machine to limit magnetic flux leakage or its complicated construction. Research limitations/implications The obtained cogging torque values and back-emf pulsation are still relatively high. In the near future, some of known techniques for reducing these pulsations can be applied, including the use of magnetic wedges, changing shapes of rotor’s poles and/or skewing of permanent magnets. Practical implications The proposed solution can be used in wind turbines as a generator. Originality/value The paper presents an original design of a new construction of a hybrid-excited claw pole machine and also an excitation current influence on cogging torque and back-emf values.

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Section: Introductionmentioning

confidence: 99%

Torque and back-emf in hybrid excited claw pole generator

Wardach

2018

COMPEL

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“…Nowadays, many different technical solutions of hybrid excited machines, including the claw pole machines with permanent magnets are mentioned in literature [1][2][3][4][5][6][7][8][9][10][11][12]. Some of this type electrical machines are used in vehicle drive [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Hybrid excited claw pole generator with skewed and non-skewed permanent magnets

Wardach

2017

Open Physics

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This article contains simulation results of the Hybrid Excited Claw Pole Generator with skewed and nonskewed permanent magnets on rotor. The experimental machine has claw poles on two rotor sections, between which an excitation control coil is located. The novelty of this machine is existence of non-skewed permanent magnets on claws of one part of the rotor and skewed permanent magnets on the second one. The paper presents the construction of the machine and analysis of the influence of the PM skewing on the cogging torque and back-emf. Simulation studies enabled the determination of the cogging torque and the back-emf rms for both: the strengthening and the weakening of magnetic field. The influence of the magnets skewing on the cogging torque and the backemf rms have also been analyzed.

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