DocumentCode :
1997083
Title :
Reduction of shaft voltages and bearing currents in five-phase induction motors
Author :
Hussain, Hussain A. ; Toliyat, Hamid A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA
fYear :
2012
fDate :
15-20 Sept. 2012
Firstpage :
3309
Lastpage :
3316
Abstract :
Induction motors are commonly used in numerous industrial applications. To maintain a reliable operation of the motor, it is important to identify the potential faults that may cause the motor to fail. Bearing failures are one of the main causes of motor breakdown. In some cases, bearings fail due to the electric current passing through them. In this paper, bearing currents in inverter driven five-phase induction motors are studied and a novel solution is proposed. First, theories of shaft voltage and bearing current are presented. Then, new switching patterns are proposed for the five-phase induction motor. The system is simulated and the results of the new switching patterns are compared with the conventional switching pattern. Finally, the new schemes are experimentally tested using a digital signal processor (DSP) to control the power converter. The experiments verified that the new switching pattern could reduce shaft voltages and bearing current without affecting motor performance.
Keywords :
PWM invertors; PWM power convertors; digital signal processing chips; failure analysis; fault location; induction motor protection; switching convertors; DSP; bearing current reduction; bearing failures; digital signal processor; fault identification; inverter driven five-phase induction motors; motor breakdown; power converter control; shaft voltage reduction; switching patterns; Capacitance; Induction motors; Inverters; Shafts; Stators; Switches; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2012 IEEE
Conference_Location :
Raleigh, NC
Print_ISBN :
978-1-4673-0802-1
Electronic_ISBN :
978-1-4673-0801-4
Type :
conf
DOI :
10.1109/ECCE.2012.6342337
Filename :
6342337
Link To Document :
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