Title :
Power derating for invertor fed induction motors
Author :
Boglietti, A. ; Ferraris, P. ; Lazzari, M.
Author_Institution :
Dipartimento di Ingegneria Elettrica Industriale, Politecnico di Torin, Italy
Abstract :
The aim of this work is to give a contribution to find a simple methodology for defining a power derating index for invertor-fed induction motors. The theoretical and experimental work has put in evidence the possibility of defining a derating coefficient using only no-load tests performed with a sinusoidal square wave and PWM invertor supply. The defined derating indexes for each invertor supply are verified by means of load tests performed on a motor equipped with thermal sensors to measure the copper and iron temperatures. In addition, for the PWM supply, the effects of the modulation index on the motor efficiency are also considered
Keywords :
PWM invertors; induction motors; load (electric); machine testing; machine theory; temperature measurement; PWM invertor supply; copper temperature measurement; derating coefficient; efficiency; induction motors; invertor fed; iron temperature measurement; modulation index; no-load tests; power derating index; sinusoidal square wave invertor supply; thermal sensors; Copper; Induction motors; Iron; Performance evaluation; Pulse width modulation; Pulse width modulation inverters; Temperature sensors; Testing; Thermal loading; Thermal sensors;
Conference_Titel :
Industry Applications Society Annual Meeting, 1994., Conference Record of the 1994 IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-1993-1
DOI :
10.1109/IAS.1994.345499
