EMI reduction with a soft-switched auxiliary commutated pole inverter

Apollo Charalambous, Xibo Yuan, Neville McNeill, Qingzeng Yan, Niall Oswald, Philip Mellor

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

11 Citations (Scopus)


PWM-controlled power converters are increasingly used in the More Electric Aircraft (MEA). However, Electromagnetic Interference (EMI) is introduced due to the high dv/dt and di/dt slew rates of their fast-switching power devices. Though EMI is conventionally mitigated by adding filters that can be often heavy and bulky, a better solution would be to address it at source, in order to achieve higher power density systems. This paper investigates how soft-switching topologies can attenuate EMI by addressing it at source. Specifically, the auxiliary commutated pole inverter (ACPI) is employed to actively control the dv/dt of the output voltage. The effect this control has on the output voltage frequency spectrum is examined with analytical models. Subsequently, a control scheme is developed for regulating the output voltage to the desired waveform and simulation results are presented. A 1.4-kW ACPI phase-leg prototype is utilized for proof of concept. Reductions in the harmonic content of the output voltage are observed in the range of 1 to 20 MHz. It is expected that the ACPI can benefit from better EMI performance and can contribute to the overall effort of achieving high power density systems for MEA applications.
Original languageEnglish
Title of host publication2015 IEEE Energy Conversion Congress and Exposition (ECCE)
Place of PublicationPiscataway, N.J.
ISBN (Print)978-1-4673-7151-3
Publication statusPublished - 2015
Externally publishedYes
EventEnergy Conversion Congress and Exposition (ECCE), 2015 IEEE - Montreal, QC, United States
Duration: 20 Sep 201524 Sep 2015


ConferenceEnergy Conversion Congress and Exposition (ECCE), 2015 IEEE
CountryUnited States
CityMontreal, QC


  • electromagnetic interference
  • switches
  • logic gates
  • voltage control

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