New CRM Topology for Zero Voltage Switching in Quadratic High Gain Boost Converter

Nikhil Korada, Raja Ayyanar

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

Abstract

This paper proposes a new critical conduction mode (CRM) DC-DC topology based on quadratic high gain boost converter (QHGBC). Quadratic converter is a high gain topology, which has the drawbacks of high conduction loss in the input diodes and high switching loss in the main switch. A direct implementation of CRM scheme for QHGBC does not result in soft switching, as the switch voltage is clamped to the intermediate level by the input diodes. Adding a small auxiliary inductor in series with one of the input diode as proposed here, together with suitable design considerations for output side inductor and resonant time, results in complete zero voltage switching (ZVS) for both the MOSFETs. Additionally, input diode transitions undergo zero current switching (ZCS) without reverse recovery, which reduces the overall electromagnetic interference (EMI) issues. The main advantage of CRM approach for QHGBC is that the input current ripple can be very small and only the output side inductor which carries significantly lower current needs to have a high ripple. PLECS based extensive simulations and results obtained from hardware prototype corresponding to the DC-DC stage of a PV microinverter validate the performance of the proposed converter. A peak efficiency of 96.4%, and efficiencies above 94.7% under all operating conditions are achieved.

Original languageEnglish (US)
Title of host publicationECCE 2020 - IEEE Energy Conversion Congress and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4794-4801
Number of pages8
ISBN (Electronic)9781728158266
DOIs
StatePublished - Oct 11 2020
Externally publishedYes
Event12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States
Duration: Oct 11 2020Oct 15 2020

Publication series

NameECCE 2020 - IEEE Energy Conversion Congress and Exposition

Conference

Conference12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
CountryUnited States
CityVirtual, Detroit
Period10/11/2010/15/20

Keywords

  • Critical conduction mode
  • GaN
  • high gain boost
  • quadratic
  • wide band gap devices
  • zero current switching
  • zero voltage switching

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology

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