An evaluation of the electrostatic shielded induction motor: a solution for rotor shaft voltage buildup and bearing current
- 23 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 1 (01972618) , 610-617
- https://doi.org/10.1109/ias.1996.557099
Abstract
This paper evaluates a new induction motor, the electrostatic shielded induction motor (ESIM). An ESIM reduces rotor shaft voltages to levels below the bearing lubricant's electric field intensity breakdown level and offers one solution to accelerated bearing wear caused by fluting induced by pulse width modulated (PWM) inverters. The paper begins by reviewing shaft voltages and the resulting bearing currents when operated on PWM voltage source inverters. An example of bearing fluting is shown and system models are presented and discussed. The construction details and test results for several ESIMs are presented. Experimental results show the ESIM solves the electrostatically induced rotor shaft voltage and bearing problem without degrading the electromagnetic performance of the motor.Keywords
This publication has 7 references indexed in Scilit:
- The effects of PWM voltage source inverters on the mechanical performance of rolling bearingsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- System electrical parameters and their effects on bearing currentsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Bearing currents and their relationship to PWM drivesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Effect of PWM inverters on AC motor bearing currents and shaft voltagesIEEE Transactions on Industry Applications, 1996
- Modeling and damping of high-frequency leakage currents in PWM inverter-fed AC motor drive systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1995
- Leakage current reduction for a high-frequency carrier inverter feeding an induction motorIEEE Transactions on Industry Applications, 1992
- Shaft Currents in Electric MachinesTransactions of the American Institute of Electrical Engineers, 1924