Effect of multistress on the lifetime characteristics of magnet wires used in flyback transformer

Author

Grzybowski, S. ; Bandaru, S.

Author_Institution

Dept. of Electr. & Comput. Eng., Mississippi State Univ., MS, USA

fYear

2004

fDate

19-22 Sept. 2004

Firstpage

200

Lastpage

203

Abstract

This work presents the results of the effect of multistress on the lifetime characteristics of fine gauge magnet wires used in the flyback transformers, adjustable speed drives, motor windings, ignition coils. Accelerated life tests are performed on AWG 43 gauge Polyesterimide insulated magnet wires. This study uses pulse voltages. Multistress includes high temperature, high frequency, and high voltages. Lifetime analysis provides statistical information such as lifetime characteristics, probability of failures, and lifetime percentiles. This study uses Weibull distribution to model life characteristics. The failure data of the aging tests is used to obtain parameters of the frequency-electrical-thermal life model. The life model is used to describe the behavior of insulation in the presence of multistress and is also used to estimate the lifetime of magnet wires at any desired stress level. The parameters of the frequency-electrical-thermal life model used in this study are obtained by regression analysis.

Keywords

Weibull distribution; failure analysis; insulated wires; life testing; machine windings; motor drives; polymers; power transformer insulation; power transformer testing; regression analysis; stress analysis; variable speed drives; AWG 43 gauge Polyesterimide insulated magnet wire; Weibull distribution; accelerated life test; adjustable speed drive; aging test; failure data; failure probability; fine gauge magnet wire; flyback transformer; frequency-electrical-thermal life model; ignition coil; insulation behavior; lifetime analysis; lifetime characteristics; motor winding; multistress effect; pulse voltage; regression analysis; Cable insulation; Coils; Flyback transformers; Frequency; Ignition; Life estimation; Life testing; Performance evaluation; Variable speed drives; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2004. Conference Record of the 2004 IEEE International Symposium on

ISSN

1089-084X

Print_ISBN

0-7803-8447-4

Type

conf

DOI

10.1109/ELINSL.2004.1380518

Filename

1380518