Title :
Transient effects in application of PWM inverters to induction motors
Author_Institution :
H.A. Simons Ltd., Vancouver, BC, Canada
Abstract :
Standard squirrel cage induction motors are subjected to nonsinusoidal wave shapes, when supplied from adjustable frequency inverters. In addition to causing increased heating, these wave patterns can be destructive to the insulation. Pulse width modulated (PWM) inverter output amplitudes and risetimes are investigated, and motor insulation capabilities are discussed. Voltage reflections are simulated for various cable lengths and risetimes and are presented graphically. Simulations confirm potential problems with long cables and short risetimes. Application precautions are also discussed.<>
Keywords :
induction motors; invertors; machine insulation; pulse width modulation; transients; PWM inverter; PWM inverters; adjustable frequency inverters; heating; induction motors; motor insulation; nonsinusoidal wave shapes; transient effects; voltage reflections; Amplitude modulation; Frequency; Heating; Induction motors; Insulation; Pulse inverters; Pulse width modulation inverters; Reflection; Shape; Voltage;
Conference_Titel :
Pulp and Paper Industry Technical Conference, 1991., Conference Record of 1991 Annual
Conference_Location :
Montreal, Quebec, Canada
DOI :
10.1109/PAPCON.1991.239644
