Title :
Steady-state stability criterion for induction motors
Author :
Bowler, P. ; Nir, B.
Author_Institution :
University of Manchester Institute of Science & Technology, Department of Electrical Engineering & Electronics, Manchester, UK
fDate :
7/1/1974 12:00:00 AM
Abstract :
The instability of induction motors has been widely observed when operating on variable-frequency supplies, particularly on light loads at low speeds. This phenomenon is analysed for steady-state conditions using the single-phase equivalent circuit of the motor and considering a stable system to have constant-power balance. The analysis confirms the low frequency, low-slip instability and predicts a high-slip limit of stable operation. These limits are both confirmed by measurements on a motor/inverter drive. The amplitude and frequency of oscillations are not investigated.
Keywords :
equivalent circuits; induction motors; slip (asynchronous machines); stability criteria; induction motors; instability; light loads at low speeds; single phase equivalent circuit; slip; steady state stability criterion; variable frequency supplies;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1974.0151
