Hybrid PWM DC/DC converter for EV on-board charger with single transformer. Issue 2 (3rd April 2018)

• Record Type: Journal Article
• Authors: Choi, Jin-Yong; Choi, Seung-Won; Lee, Jun-Young
• Is Part Of: EPE journal. Volume 28:Issue 2(2018)
• Page Start: 63
• Page End: 74
• Publication Date: 2018-04-03
• Subjects: Electric vehicle -- battery charger -- DC/DC converter; Power electronics -- Periodicals; 621.31705
• DOI: 10.1080/09398368.2018.1425525
• Languages: English
• ISSNs: 0939-8368

Abstract

Abstract: This paper suggests a hybrid PWM DC/DC converter comprised of the Full-Bridge (FB) converter and the PWM resonant converter for on-board chargers. It has hybrid characteristics having output characteristics of the FB converter and switching characteristics of the PWM resonant converter. They are coupled in a single transformer so that the power distribution problem which causes increase of the transformer size can be solved. Because the transformer leakage inductance is used as a resonant parameter and the output inductor current ripple is very small, a dissipative snubber circuitry and output current filter can be removed. Zero-voltage-zero-current switching(ZV-ZCS) operation of bottom switches and ZVS operation of top switches can be accomplished by a proper design of the resonant parameter. The feasibility of the proposed charger is verified with a 6.6 kW prototype.