Mathematical Model of Common-Mode Sources in Long-Cable-Fed Adjustable Speed Drives

Amir Ganjavi, Firuz Zare, Dinesh Kumar, Amin Abbosh, Bialkowski Konstanty, Pooya Davari

Research output: Contribution to journalJournal articleResearchpeer-review


Motor drive systems with long feeder cables are widely used in mining and energy sectors, such as offshore oil and gas drilling. In recent decades, to prevent issues with electromagnetic interference, power quality standards have been defined for the 2-150 kHz frequency range. In order to comply with these standards, manufacturers need to design filters to avoid exceeding the thresholds set by the standards. An important aspect that needs to be considered is the accurate modeling of currents circulating through common-mode loops. This article addresses this modeling by using a mathematical approach. The power cable's common-mode model is extracted from the measurement data using the finite-element method via finding the effective permittivity of the PVC materials. The common-mode noise sources, including the grid side voltage through the front-end diode rectifier and the output voltage through the rear-end inverter, are both modeled by extracting the Fourier series calculations. Consequently, noise emissions circulating through different common-mode loops are analytically modeled. Through the proposed modeling strategy, the harmonic spectrum of resonances can be precisely analyzed. The results are validated through simulation and experimental data.

Original languageEnglish
JournalI E E E Transactions on Industry Applications
Issue number2
Pages (from-to)2013-2028
Number of pages16
Publication statusPublished - 2022


  • Adjustable speed drive (ASD)
  • cable
  • Electromagnetic interference
  • electromagnetic interference (EMI)
  • Harmonic analysis
  • harmonics
  • Integrated circuit modeling
  • Mathematical models
  • motor drive system
  • Power cables
  • Power harmonic filters
  • Predictive models


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