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High-Frequency Modeling of an Adjustable Speed Drive
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| Author(s) |
Yannick Weens, Nadir Idir, Jean Jacques Franchaud, Robert Bausiere |
| Abstract |
The use of high frequency switching power
devices in Adjustable Speed Drives (ASDs) induces high
voltage variations (dv/dt) that excite the parasitic elements
of the power circuit, leading to conducted emissions at high
frequencies. The advent of these devices has thus generated
several unexpected problems, such as premature
deterioration of motor ball bearings and high increases in
the ElectroMagnetic Interference (EMI) levels, caused by
the circulation of the high frequency parasitic currents.
This paper deals with high frequency modeling of an ASD
system. This will be used to study the influence of the PWM
inverter commutations on the level of the common mode
and the differential mode currents between the power
converter and the motor. First a shielded 4-wire energy
cable model is presented. Then, a high frequency model of
the PWM inverter and a model of the AC motor are
proposed. Finally, the ASD system is simulated and the
obtained results are compared to the experimental
measurements. |
| Download |
| Filename: | T8-103.pdf |
| Filesize: | 605.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-08 by System |
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