Title :
Calculation of circulating bearing currents in machines of inverter-based drive systems
Author :
Muetze, A. ; Binder, A.
Abstract :
An eddy-current model can describe the high frequency circulating bearing current that may occur in machines of inverter-based drive systems. The parameters of an equivalent circuit are derived from the model. The ratio between bearing current and common mode current amplitudes for different machines is calculated. The theoretical maximum ratio is about 0.35. Copper loops applied for bearing current measurement may decrease the circulating bearing currents up to almost 40%.
Keywords :
eddy currents; electric current measurement; equivalent circuits; invertors; machine bearings; motor drives; bearing current measurement; circulating bearing current; common mode current; eddy-current model; equivalent circuit; inverter-based drive system; machine; Drives; Frequency; Induction motors; Inverters; Lamination; Magnetic flux; Shafts; Stator cores; Stator windings; Voltage;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348494
