Title :
Online efficiency diagnostic method of three phase asynchronous machines
Author :
Bacher, Johann Peter
Author_Institution :
Inst. of Drive Technol. & Electr. Machines, Univ. of Technol. Graz, Graz
Abstract :
There are various methods to determine the efficiency of three phase induction machines. But all of them have in common that they are to inaccurate or they are impracticable. In this paper the machine efficiency will be derived from start up data. For that purpose the variation with time 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; stators; diagnostic method; phase induction machines; speed sensor; stator currents; stator voltages; three phase asynchronous machines; Acceleration; Air gaps; Costs; Current measurement; Induction machines; Shafts; Stators; Time measurement; Torque measurement; Voltage fluctuations;
Conference_Titel :
Power Engineering, Energy and Electrical Drives, 2009. POWERENG '09. International Conference on
Conference_Location :
Lisbon
Print_ISBN :
978-1-4244-4611-7
Electronic_ISBN :
978-1-4244-2291-3
DOI :
10.1109/POWERENG.2009.4915247
