A 100kHz 95.91% Efficiency SiC-device-based Split Output Converter with EMI Reduction

Qingzeng Yan, Xibo Yuan, Xiaojie Wu

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

1 Citation (Scopus)
272 Downloads (Pure)


The adoption of silicon carbide (SiC) MOSFETs and SiC Schottky diodes in power converters promises a further improvement of the attainable power density and system efficiency, while it is restricted by several issues caused by the ultra-fast switching, such as phase-leg shoot-through (`crosstalk' effect), high turn-on losses, electromagnetic interference (EMI), etc. This paper presents a split output converter which can overcome the limitations of the standard two-level voltage source converters when employing the fast-switching SiC devices. The split output converter uses auxiliary inductors (called `spilt inductors') to decouple the upper SiC MOSFET and the lower SiC MOSFET of the same phase leg, thus suppressing the crosstalk effect, improving the switching performance (e.g. lower turn-on losses), and reducing the EMI. However, there are also several issues brought by the split inductors, e.g. the current freewheeling problem, the current pulses and voltage spikes of the split inductors, and the disappeared synchronous rectification, which can together increase the losses of the converter. A 95.91% efficiency has been achieved by the split output converter at the switching frequency of 100kHz with EMI reduction.
Original languageEnglish
Title of host publication2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia 2016)
Subtitle of host publicationProceedings of a meeting held 22-26 May 2016, Hefei, China
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages8
ISBN (Electronic)9781509012107
ISBN (Print)9781509012114
Publication statusPublished - Sep 2016
EventIPEMC (ECCE-Asia) - Hefei, China
Duration: 22 May 201626 May 2016


ConferenceIPEMC (ECCE-Asia)


  • Electromagnetic interference (EMI)
  • Silicon carbide
  • Split output converters
  • Crosstalk
  • Efficiency


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