Title :
Efficiency determination of standard asynchronous machines from start-up data
Author :
Bacher, J. ; Waldhart, F.
Author_Institution :
Inst. of Drive Technol. & Electr. Machines, Graz, Austria
Abstract :
There are various methods to determine the efficiency of three phase induction machines. But all of them have in common that they are inaccurate or they are impracticable. In this paper the machine efficiency will be derived from start up data. For that purpose the time dependence of all stator currents and all stator voltages have to been measured. Normally it isn´t possible to mount a speed sensor on the machine. For this reason only the speed at the end of the start up can be determined. Practical results with standard three phase induction machines with different power ranges from 3 kW up to 500 kW are presented.
Keywords :
asynchronous machines; power 3 kW to 500 kW; speed sensor; standard asynchronous machines; start-up data; stator currents; stator voltages; three phase induction machines; Current measurement; Induction motors; Resistance; Rotors; Stators; Torque; electromagnetic fields; electromagnetic forces; induction motors; squirrel cage motors;
Conference_Titel :
Electrical Machines (ICEM), 2010 XIX International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4174-7
Electronic_ISBN :
978-1-4244-4175-4
DOI :
10.1109/ICELMACH.2010.5608183
