Investigation of deterioration mechanism of inorganic insulation under high temperature

Mizutani, Yuki; Ikeda, Tetsuo; Tatsuki, O.; Kumazawa, Ryoji; Aizawa, Rie

doi:10.1109/ceidp.2000.885220

Cited by 2 publications

(2 citation statements)

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“…This threshold voltage is compatible with the design of ordered coils [11] that can be fed by PWM converters able to drive high power density motors in their applicative context. Ceramic insulation is currently used at high temperatures for power electronic components; research results are available in this domain [12]. However, for electrical machinery applications, many other problems must be solved in particular in the field of resistance of inorganic coils to mechanical stresses due to vibrations.…”

Section: Discussionmentioning

confidence: 99%

Experimental characterization of the maximum turnto-turn voltage for inorganic high temperature motor

Iosif

Roger

Duchesne

et al. 2014

2014 IEEE Electrical Insulation Conference (EIC)

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Ceramic-insulated wires have very good thermal characteristics. With an adapted motor design, such inorganic wires could be used for building new electric motors able to work at very high internal temperatures, up to 500°C, which opens interesting perspectives for very high power density electric motors. After explaining the advantages of high internal temperatures, electrical characteristics of inorganic coils are compared to conventional enameled wires associated with a polymer impregnation. For classical organic wire, the Partial Discharge Inception Voltage (PDIV) is an important parameter; for ceramic wires, physical phenomena are very different and this concept is not still completely defined. However, the tests performed on ceramic-coated wires show that fast current pulses appears for voltages over a threshold measured for temperatures up to 500°C. This threshold voltage is an interesting indicator for inorganic coil designs: the turn-to-turn voltage must remain below this threshold at any point of the coil.

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Section: Discussionmentioning

confidence: 99%

Experimental characterization of the maximum turnto-turn voltage for inorganic high temperature motor

Iosif

Roger

Duchesne

et al. 2014

2014 IEEE Electrical Insulation Conference (EIC)

View full text Add to dashboard Cite

show abstract

“…On the market, laminated mica is found on a fiberglass ribbon which allows for some flexibility, and is also available in the form of sheets. This type of insulation can be used up to 450 ∘ C-600 ∘ C [27,28].…”

Section: Inter-turn Insulationmentioning

confidence: 99%