Title :
A Failure Mode for PWM Inverter-Fed AC Motors Due to the Anti-Resonance Phenomenon
Author :
Mirafzal, Behrooz ; Skibinski, Gary L. ; Tallam, Rangarajan M.
Author_Institution :
Allen-Bradley Drives Div., Rockwell Autom., Mequon, WI
Abstract :
A failure mode for PWM inverter-fed AC motors due to the anti-resonance phenomenon is introduced and investigated in this paper. At high frequencies, an AC motor behaves as a series RLC circuit with a resonance point, so-called anti- resonance, typically above 1.0 MHz. If the voltage oscillation frequency, caused by the reflected wave phenomenon matches the motor anti-resonance frequency, an amplified voltage will appear internally between the turns of the stator windings. This externally unobservable state causes winding insulation failure in the AC motor. This phenomenon is experimentally verified using a rewound Permanent Magnet (PM) motor with accessible taps along the stator windings, and the results are presented in this paper.
Keywords :
AC motors; PWM invertors; RLC circuits; permanent magnet motors; stators; PWM inverter-fed AC motors; RLC circuit; anti-resonance phenomenon; permanent magnet motor; stator windings; voltage oscillation frequency; AC motors; Frequency; Insulated gate bipolar transistors; Insulation; Permanent magnet motors; Power cables; Power system transients; Pulse width modulation inverters; Stator windings; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE
Conference_Location :
Edmonton, Alta.
Print_ISBN :
978-1-4244-2278-4
Electronic_ISBN :
0197-2618
DOI :
10.1109/08IAS.2008.197
