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 (SCI) 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. In particular, pulse-width-modulated (PWM) inverter output amplitudes and risetimes are investigated. 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 suggested
Keywords :
invertors; pulse width modulation; squirrel cage motors; transients; PWM inverters; adjustable-frequency inverters; cable; heating; motor insulation; nonsinusoidal wave-shapes; output amplitudes; risetimes; squirrel cage motors; transients; voltage reflections; Cable insulation; Frequency; Induction motors; Insulated gate bipolar transistors; Manufacturing; Pulp and paper industry; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Voltage;
Journal_Title :
Industry Applications, IEEE Transactions on
