A novel three-level ZVS PWM inverter topology for high-voltage DC/DC conversion systems with balanced voltage sharing and wider load range

Author

Song, In-Ho ; Yoo, Sang-Bong ; Suh, Bum-Seok ; Hyun, Dong-seok

Author_Institution

Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea

Volume

2

fYear

1996

fDate

6-10 Oct 1996

Firstpage

973

Abstract

As the three-level (TL) ZVS PWM DC/DC converter operates like a full-bridge (FB) ZVS PWM DC/DC converter and the blocking voltage of each switching device is a half of the DC-link voltage, it is suitable for high input voltage applications. However, it has some problems as follows; the blocking voltage of each device is unbalanced and it causes the power loss of the inner switching devices to be increased. Also, it has a narrow load range so that the switching losses and the efficiency are reduced as it goes to the light load. This paper presents a novel TL ZVS PWM DC/DC converter, which can reduce the overvoltage of the outer switches, eliminates the unbalance of the voltage sharing between the switches at turn-off due to the stray inductances, and operate from no load to full load. The characteristics and the performances of the proposed TL ZVS PWM DC/DC converter are verified by simulation and experimental results

Keywords

DC-DC power convertors; PWM invertors; losses; overvoltage; switching circuits; DC-link voltage; balanced voltage sharing; blocking voltage; efficiency reduction; high input voltage applications; high-voltage DC/DC conversion systems; inner switching devices; outer switches; overvoltage reduction; power loss; stray inductances; switching device; three-level ZVS PWM inverter topology; turn-off; wider load range; Capacitors; DC-DC power converters; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Switches; Switching converters; Topology; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE

Conference_Location

San Diego, CA

ISSN

0197-2618

Print_ISBN

0-7803-3544-9

Type

conf

DOI

10.1109/IAS.1996.560200

Filename

560200