Title :
A method of lowering bearing current with embedded circular comb-like coil
Author :
Kim, Jun-seok ; Nam, Kwang-Hee
Author_Institution :
Dept. of Electr. Eng., Postech Univ., Pohang, South Korea
Abstract :
Common mode voltage generated by PWM switching causes motor bearing failures in inverter-motor drive systems, since bearing current runs through parasitic capacitances and motor bearings to ground. In this paper, we propose a method of reducing bearing current with the use of an embedded circular comb-like coil in the stator slots. We verified the validity of the proposed method by simulation and experiment
Keywords :
AC motor drives; PWM invertors; capacitance; coils; machine bearings; stators; switching circuits; PWM inverter; PWM switching; bearing current; bearing current reduction; common mode voltage generation; embedded circular comb-like coil; inverter-motor drive systems; motor bearing failures; motor bearings; parasitic capacitances; stator slots; Coils; Frequency; Impedance; Lubricating oils; Parasitic capacitance; Pulse width modulation; Rotors; Shafts; Stators; Voltage;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.882105
