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http://dx.doi.org/10.5207/JIEIE.2002.16.6.066

A Study on the ZVZCS Three Level DC/DC Converter without Primary Freewheeling Diodes  

Bae, Jin-Yong (동국대 대학원 전기공학과)
Kim, Yong (동국대 전기공학과)
Baek, Soo-Hyun (동국대 전기공학과)
Kwon, Soon-Do (대림대 전자정보통신계열)
Kim, Pil-Soo (대림대 자동차과)
Gye, Sang-Bum ((주)메디슨 연구소)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.16, no.6, 2002 , pp. 66-73 More about this Journal
Abstract
This paper presents ZVZCS(Zero-Voltage and Zero-Current Switching) Three Level DC/DC Converter without primary freewheeling diodes. The new converter presented in this paper used a phase shirt control with a flying capacitor in the primary side to achieve ZVS for the outer switches. A secondary anxiliary circuit which consists of one small capacitor, two small diodes and one coupled inductor, is added in the secondary to provide ZVZCS conditions to primary switches, ZVS for outer switches and ZCS for inner switches. Many advantages include simple secondary auxiliary circuit topology, high efficiency, and low cost make the new converter attractive for high power applications. Also the circulating current flows through the circuit so that it causes the needless coduction loss to be occurred in the devices and the transformer of the circuit The new converter has no primary auxiliary diodes for freewheeling current. The principle of operation, feature and design considerations are illustrated and verified through the experiment with a 1[㎾］ 50[KHz］IGBT based experimental circuit.
Keywords
ZVZCS; Three Level Converter; Coupled Inductor; Without Primary Freewheeling Diodes;
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  • Reference
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