Filtering techniques to minimize the effect of long motor leads on PWM inverter-fed AC motor drive systems
- Oregon State Univ., Corvallis, OR (United States). Dept. of Electrical and Computer Engineering
- Texas A and M Univ., College Station, TX (United States)
- Toshiba International Corp., Houston, TX (United States). Industrial Div.
In this paper, filtering techniques are investigated to reduce the motor terminal overvoltage, ringing and dv/dt in inverter-fed ac motor drive systems where long leads are required. Analysis is presented to show that the distributed LC of a cable and the pulse-width modulated (PWM) inverter switching action lead to motor terminal voltage reflections and ringing that stress the turn insulation and contribute to bearing currents. First- and second-order shunt filter designs are analyzed and compared. Detailed design equations to match the filter impedance values are presented. It is demonstrated that a first-order shunt filter connected at the motor terminals significantly reduces the overvoltage stress and ringing, and also lowers the dv/dt of the PWM switching pulse. Simulation and experimental results are presented to verify the proposed filter designs for 50-ft and 100-ft cable lengths for 460-V PWM insulated gate bipolar transistor (IGBT) ac motor drive systems.
- OSTI ID:
- 372175
- Report Number(s):
- CONF-9510203-; ISSN 0093-9994; TRN: IM9641%%252
- Journal Information:
- IEEE Transactions on Industry Applications, Vol. 32, Issue 4; Conference: IEEE/Industrial Application Society conference, Orlando, FL (United States), 8-12 Oct 1995; Other Information: PBD: Jul-Aug 1996
- Country of Publication:
- United States
- Language:
- English
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