High temperature characterization of electrical steels using an adapted Epstein frame

Ababsa, M. L.; Ninet, Olivier; Vélu, G.

doi:10.1109/intmag.2017.8007652

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“…Soft magnetic laminated cores can operate up to 500 ∘ C when the designer accepts a slight reduction of the flux density. the magnetic sheets must be insulated by their natural oxidation [10,11].…”

Section: Introductionmentioning

confidence: 99%

Design of inorganic coils for high temperature electrical machines

2019

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The paper deals with a high frequency model of inorganic coils used to build high temperature (HT∘) motor. The HT∘ wire has a nickel layer that protects the copper against oxidation and a thin inorganic coating, which has poor electrical and mechanical properties. Therefore, the coils must be designed with a special care for getting a good distribution of turn-to-turn voltage during the fast transients excited by the steep fronted voltages of the PWM inverter.A specific coil structure is proposed and a high frequency (HF) equivalent circuit able to compute the turn-to-turn voltages during transients. The voltage distribution between the coils of a stator phase is also detailed.

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Section: Introductionmentioning

confidence: 99%