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

fYear

2010

fDate

7-10 Nov. 2010

Firstpage

1754

Lastpage

1759

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;

fLanguage

English

Publisher

ieee

Conference_Titel

IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society

Conference_Location

Glendale, AZ

ISSN

1553-572X

Print_ISBN

978-1-4244-5225-5

Electronic_ISBN

1553-572X

Type

conf

DOI

10.1109/IECON.2010.5675416

Filename

5675416