EMI Reduction with a Soft-Switched Auxiliary Commutated Pole Inverter

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

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

12 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 2015)
Subtitle of host publicationProceedings of a meeting held 20-24 September 2015, Montreal, Quebec, Canada.
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages8
ISBN (Electronic)978-1-4673-7151-3
ISBN (Print)9781467371520
Publication statusPublished - 29 Oct 2015
EventIEEE Energy Conversion Congress & Exposition (ECCE 2015) - Montreal, Quebec, Canada
Duration: 20 Sep 201524 Sep 2015

Publication series

NameEnergy Conversion Congress and Exposition (ECCE), 2015 IEEE
ISSN (Print)2329-3721
ISSN (Electronic)2329-3748


ConferenceIEEE Energy Conversion Congress & Exposition (ECCE 2015)
CityMontreal, Quebec


  • EMI
  • Soft-switching
  • auxiliary commutated pole inverter
  • frequency spectrum
  • fixed-timing control

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