The time recorder for the accelerated aging life testing of dielectric material under high square voltage

A life time recorder is advisably required in the ageing life testing of dielectric material , because parallel testing of multi-samples is allowed with less time costing and more exact result. Based on the thermal measurement to monitor and record the state of the dielectric samples, a recorder is presented in this paper. When some samples are broken-down,the rapid rising of temperature of the limiting resistors installed in the high voltage test circuit can be considered as the broken down signals of the samples. So those signals are transferred into digital signals first,then computed by microcomputer and last output control signals.The exact life recording with time percentage error less than 2% and quick cutting within 1-3 seconds of the broken-down channel can be both achieved by this way. The life time recorder presented in this paper has been put into practical application and work well.

[1]  A. H. Bonnett,et al.  Analysis of the impact of pulse-width modulated inverter voltage waveforms on AC induction motors , 1994, Proceedings of IEEE Pulp and Paper Industry Conference.

[2]  N. Amyot,et al.  Turn insulation aging of motors exposed to fast pulses of inverter drives , 1997, Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference.

[3]  Weijun Yin,et al.  Failure mechanism of winding insulations in inverter-fed motors , 1997 .

[4]  G. Borner,et al.  Failure mechanism of the interturn insulation of low voltage electric machines fed by pulse-controll , 1996 .

[5]  M. Kaufhold,et al.  Failure mechanism of the interturn insulation of low voltage electric machines fed by pulse controlled inverters , 1995, Proceedings of 1995 Conference on Electrical Insulation and Dielectric Phenomena.

[6]  J.C.G. Wheeler,et al.  Effects of converter pulses on the electrical insulation in low and medium voltage motors , 2005, IEEE Electrical Insulation Magazine.

[7]  F. Guastavino,et al.  Life tests on twisted pairs subjected to PWM-like voltages , 2004, Proceedings of the 2004 IEEE International Conference on Solid Dielectrics, 2004. ICSD 2004..

[8]  D. L. Dietrich,et al.  An alternative method of analyzing multi-stress multi-level life and accelerated life tests , 1996, Proceedings of 1996 Annual Reliability and Maintainability Symposium.

[9]  R. J. Beeckman.  Inverter drive issues and magnet wire responses , 1999, Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.99CH37035).

[10]  T. Lebey,et al.  Lifetime determination of polyimide under square voltage waveforms , 1997, Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference.

[11]  Hideo Hirose.  The relation between accelerated life tests by brand-new insulation and step-up voltage tests by working insulation , 2003, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417).