Investigating the Effect of Different Parameters on Harmonics and EMI Emissions at the Frequency Range of 0–9 kHz

Due to the increasing use of fast switching semiconductors, emissions affected by the Adjustable Speed Drives (ASDs) are entering the new frequency range of 2-150 kHz. Emissions at this new frequency range are categorised into 2-9 and 9-150 kHz ranges among the standardization communities. Consequently, designing new filters for theses frequency ranges is of the determined efforts by ASD manufacturers. In this paper, essential factors impacting on the filter design in ASDs for 0-2 kHz and the new frequency range of 2-9 kHz are investigated. Non-linear effects of DC link filter on low order harmonic emissions of 0-2 kHz is investigated to understand how the existing filters can comply with the emerging standard of 2-150 kHz. Moreover, a system model is presented to predict the effects of cables and Electromagnetic Interference (EMI) filter parameters on resonances at the frequency range of 2-9 kHz.