Ultrahigh speed induction machine overheated by subharmonics of PWM inverter

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 ope...

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Bibliographic Details
Main Authors: Stumpf, P, Varga, Z, Sepsi, T D, Jardan, R K, Nagy, I
Format: Conference Proceeding
Language:English
Subjects:
Converters
Frequency measurement
Harmonic analysis
Induction Machines
Pulse Width Modulated Power Converters
Pulse width modulation
Stators
Trajectory
Voltage measurement
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Summary: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.
ISSN:1553-572X
DOI:10.1109/IECON.2010.5675416