Title :
PWM drive related bearing failures
Author :
Macdonald, Don ; Gray, Wendell
Abstract :
The phenomenon of motor shaft voltages producing circulating shaft currents has been recognized since the 1920s. When a motor is operated by sinusoidal power, shaft voltages are caused by alternating flux linkages with the shaft. This article investigates the phenomenon of induced shaft voltages caused by PWM AC variable speed drives and discusses methods of mitigating their harmful effects
Keywords :
AC motor drives; DC-AC power convertors; PWM invertors; machine bearings; rotors; variable speed drives; PWM AC variable speed drives; alternating flux linkages; circulating shaft currents; invertors; motor shaft voltages; Couplings; Drives; Frequency; Lamination; Microscopy; Pulse width modulation; Rotors; Shafts; Stator cores; Voltage;
Journal_Title :
Industry Applications Magazine, IEEE
DOI :
10.1109/2943.771365
