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In order to efficiently reduce EMI emissions, especially common mode (CM) conducted noise emissions that are the most disturbing in any adjustable-speed drive systems, behaviour understanding and propagation path knowing of parasitic currents in the system are indispensable. In this paper, a simple CM disturbances modelling is proposed to estimate or calculate the CM noise currents. The modelling...
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...
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