Title :
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
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;
Conference_Titel :
Electric Machines and Drives Conference Record, 1997. IEEE International
Conference_Location :
Milwaukee, WI
Print_ISBN :
0-7803-3946-0
DOI :
10.1109/IEMDC.1997.604263
