Effects of risetime and cable length on motor insulation degradation resulting from operation on PWM voltage source inverters

Author

Hyypio, David B.

Author_Institution

Marathon Electr., Wausau, WI, USA

fYear

1997

Abstract

The effects of cable length and PWM inverter voltage risetime are investigated to assess their respective contribution to the peak voltage amplitude and to the destructive corona-producing energy contained in the transient overshoot caused by voltage wave reflection at the electric machine terminals. A finite difference model is used to simulate the voltage response of the system, comprised of the voltage source inverter, cable and terminating winding, to conveniently study the effects of varying inverter output voltage waveform risetime and cable length. Some generalized conclusions are given based on the simulations

Keywords

PWM invertors; corona; finite difference methods; machine insulation; machine theory; power cables; squirrel cage motors; transient analysis; PWM voltage source inverters; cable length effects; corona-producing energy; finite difference model; motor insulation degradation; peak voltage amplitude; squirrel cage motors; terminating winding; transient overshoot; voltage response simulation; voltage risetime effects; voltage wave reflection; Cable insulation; Cable shielding; Corona; Degradation; Dielectrics and electrical insulation; Electric machines; Pulse width modulation; Pulse width modulation inverters; Reflection; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines and Drives Conference Record, 1997. IEEE International

Conference_Location

Milwaukee, WI

Print_ISBN

0-7803-3946-0

Type

conf

DOI

10.1109/IEMDC.1997.604263

Filename

604263