Investigations of magnet wire enamels and impregnants especially for inverter-fed motors

Pohlmann, Friedhelm; Busch, Rudolf

doi:10.1109/ceidp.2000.884028

Cited by 1 publication

(1 citation statement)

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“…Whereas, the failure of insulation cannot be amibuted to a single factor but is a result of the combined effects of partial discharge, dielectric heating and space charge [5] 9], in OUT experimental activity we have considered stator windings of rectangular cross section typically adopted in traction motor in locomotives.…”

Section: Introductionmentioning

confidence: 99%

Study on mechanism and characteristics of dielectric breakdown in polyimide film

Wen

Guo

Zhan

et al.

Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004.

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IGBT Pulse Width Modulation (PWM) inverter driven induction motors for adjustable speed applications have been widely used since their introduction. However, the use of PWM variable frequency traction motor can lead to premature failure of the winding insulation, which most often occurs due to breakdown of the interturn insulation. In order to investigate the mechanism and characteristics of dielectric breakdown in a new kind of polyimide film, which is used as primary insulation in PWM inverter-fed traction motor, an experimental activity has been carried out on specimen according to applications in locomotives. The effect o f different types of defects has been studied through several groups of breakdown test. Furthermore, line texture of the breakdown part based on energy spectrum analysis and stereoscan photograph is analyzed; finally, the characterization and mechanism of the dielectric breakdown are presented.

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Section: Introductionmentioning

confidence: 99%