Title :
Ultrahigh speed induction machine overheated by subharmonics of PWM inverter
Author :
Stumpf, P. ; Varga, Z. ; Sepsi, T.D. ; Jardan, R.K. ; Nagy, I.
Author_Institution :
Fac. of Electr. Eng., Budapest Univ. of Technol. & Econ., Budapest, Hungary
Abstract :
The paper reports unexpected failures of ultrahigh speed induction machine (USIM) supplied by PWM converter applied in a system developed for utilizing renewable and waste energies. Due to the high supply frequency of USIM the frequency ratio in the PWM converter was unusually low. The imperfect operation of the microcontroller commanding the PWM pattern generated subharmonics. It developed considerable additional copper losses in the rotor resulting in overheating. Approximate calculation based on experimental results proves the diagnosis.
Keywords :
PWM invertors; asynchronous machines; microcontrollers; rotors; PWM converter; PWM inverter; PWM pattern generated subharmonics; copper loss; microcontroller; overheating; renewable energy; rotor; ultrahigh speed induction machine; waste energy; Converters; Frequency measurement; Harmonic analysis; Pulse width modulation; Stators; Trajectory; Voltage measurement; Harmonic analysis; Induction Machines; Pulse Width Modulated Power Converters;
Conference_Titel :
IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Glendale, AZ
Print_ISBN :
978-1-4244-5225-5
Electronic_ISBN :
1553-572X
DOI :
10.1109/IECON.2010.5675416
