Optimal variable switching frequency scheme to reduce combined switching loss and inductor core loss of single phase grid connected inverter

Yinglai Xia, Raja Ayyanar

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

11 Scopus citations

Abstract

Reducing the power loss of a converter without increasing volume or cost in hardware has always been a much sought-after, but challenging goal. This paper discusses a scheme to improve the system overall efficiency while still meeting a given THD requirement by implementing variable instantaneous switching frequency method without any hardware changes. This paper aims at minimizing the combined switching loss and inductor core loss by including different characteristics of the two types of losses relative to the instantaneous switching frequency in the optimization process. A 1kW H-bridge inverter using SiC MOSFETs and powdered iron core has been built to validate the theoretical analysis. Both constant switching frequency scheme (20 kHz) and optimal variable frequency scheme with simple code modification have been implemented in the experimental prototype using DSP TMS320f28335. The optimal variable switching frequency scheme shows a significant saving of 27.6% on the combined switching loss and inductor core loss compared with constant switching frequency scheme.

Original languageEnglish (US)
Title of host publication2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1534-1540
Number of pages7
ISBN (Print)9781467371506
DOIs
StatePublished - Oct 27 2015
Event7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada
Duration: Sep 20 2015Sep 24 2015

Other

Other7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
CountryCanada
CityMontreal
Period9/20/159/24/15

Keywords

  • core loss
  • DSP realization
  • lagrange optimization
  • switching loss
  • variable switching frequency

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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    Xia, Y., & Ayyanar, R. (2015). Optimal variable switching frequency scheme to reduce combined switching loss and inductor core loss of single phase grid connected inverter. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 (pp. 1534-1540). [7309876] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2015.7309876