Magneto-thermal characterization of bulk forged magnetic steel used in claw pole machine

Jamil, Meryeme Toto; Bénabou, Abdelkader; Clénet, S.; Shihab, Sylvain; Arbenz, Laure; Mipo, Jean-Claude

doi:10.1016/j.jmmm.2020.166526

Cited by 4 publications

(2 citation statements)

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“…Finally, ten samples (all samples except of S.1-E and F) were submitted to microstructural analysis and mechanical hardness test. The magnetic properties of the samples are measured with a specifically developed miniaturized SST (mini SST), as in [14], [15]. Indeed, as mentioned previously (see 2.1), because of the complex shape of the claw pole rotor and its relatively small size, the sample extraction is limited to small dimensions [14].…”

Section: Methodsmentioning

confidence: 99%

“…The four needles technic is no destructive which enables to measure several times the same sample during the ageing process like the sample S1.E and S1.F. According to the homogeneity of the electrical conductivity in the claw pole attested in [14] and [15], all the samples are supposed to have fairly close conductivities before ageing. Therefore, the electrical conductivity measured on the sample S.2-a is representative of those of the other samples.…”

Section: Thermal Ageing Effects On the Electrical Conductivitymentioning

confidence: 99%

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Magnetic ageing investigation of bulk low-carbon silicon steel

Jamil

Bénabou

Clénet

et al. 2021

Journal of Magnetism and Magnetic Materials

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In this paper, the magnetic ageing of a bulk forged non-annealed magnetic core, used in claw pole synchronous machine, is investigated. The study is carried out by characterizing the material properties of two groups of samples subjected to a thermal ageing at 180 °C that corresponds to the maximum operating temperature of the claw pole rotor. The investigated characteristics are the electrical conductivity, the magnetic properties, the material microstructure and the Vickers hardness. They were characterized along with the ageing time.The results show that, during the thermal ageing, the hysteresis losses and the Vickers hardness have been affected by the magnetic ageing, whereas the electric conductivity and the normal B-H curve have not been modified. The microstructure analyses showed that carbides precipitates were the main cause behind the magnetic ageing. Moreover, the comparison between the results of two groups of samples revealed the possibility that the magnetic ageing of the material could have started during the manufacturing process of the magnetic core.

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Section: Methodsmentioning

confidence: 99%

Section: Thermal Ageing Effects On the Electrical Conductivitymentioning

confidence: 99%