Full-bridge Three-Level Converter with the Flying Capacitor and Two Clamping Diodes

Author

Zhang, Zhiliang ; Ruan, Xinbo

Author_Institution

Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut.

fYear

2005

fDate

16-16 June 2005

Firstpage

425

Lastpage

430

Abstract

This paper proposes a chopping plus phase-shift (CPS) control for the full-bridge (FB) three-level (TL) converter to obtain the following advantages: 1) the main switches suffer only the half of the input voltage; 2) zero-voltage-switching (ZVS) is achieved for the main switches; 3) the converter has two operation modes; 4) the output filter inductance is reduced; 5) the input filter can be reduced. The flying capacitor and the two clamping diodes are analyzed, which are used to avoid the unequal voltage stress of the switches due to the asymmetrical driving of the switches. The operation principle of the FB TL converter is analyzed and verified experimentally

Keywords

bridge circuits; capacitors; choppers (circuits); diodes; inductance; power filters; switching convertors; zero voltage switching; ZVS; chopping plus phase-shift control; clamping diodes; flying capacitor; full-bridge three-level converter; input voltage; output filter inductance; unequal voltage stress avoidance; zero-voltage-switching; Capacitors; Clamps; Diodes; Filters; Inductance; Stress; Switches; Switching converters; Voltage control; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581659

Filename

1581659