Design and Dynamic Performance Analysis of a Snubber-less LLC Converter Using Variable Frequency Control for Electric Vehicle Industry

Rajendra Prasad Upputuri, Bidyadhar Subudhi, Pravat Kumar Ray, Arnab Ghosh, Ghanim Putrus, Mousa Marzband

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Inductor-Inductor-Capacitor (LLC) resonant converters are widely used in on-board chargers (OBC) for electric vehicle (EV) application, due to their high power density and high efficiency. Main problem of low Q LLC resonant converter is poor output voltage regulation and low efficiency at light loads for wide input and output range application. Implementation of traditional fixed frequency control methods leads to high switching loss i.e., no zero voltage switching (ZVS) facility and significant circulating currents at light loads. To address these issues, a wide range of switching frequencies are essential. This increases the turn-off loss and magnetic core loss, leading to significant reduction in efficiency. This paper presents a variable frequency control (VFC) technique for improving the ZVS and light load efficiency of a half-bridge LLC resonant converter. The proposed VFC achieves ZVS operation of all primary side …
Original languageEnglish
Title of host publication2021 International Symposium of Asian Control Association on Intelligent Robotics and Industrial Automation, IRIA 2021
Place of PublicationPiscataway, US
PublisherIEEE
Pages119-124
Number of pages6
ISBN (Electronic)9781665433235
ISBN (Print)9781665433242
DOIs
Publication statusPublished - 20 Sep 2021
Event2021 International Symposium of Asian Control Association on Intelligent Robotics and Industrial Automation, IRIA 2021 - Goa, India
Duration: 20 Sep 202122 Sep 2021

Conference

Conference2021 International Symposium of Asian Control Association on Intelligent Robotics and Industrial Automation, IRIA 2021
Country/TerritoryIndia
CityGoa
Period20/09/2122/09/21

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