A high-efficiency DC-DC converter for high voltage DC input aeronautical static inverter

Author

Mao, Saijun ; Wang, Huizhen ; Zhang, Fanghua

Author_Institution

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

fYear

2005

fDate

7-9 Sept. 2005

Abstract

This paper proposes a high-efficiency DC-DC converter for high voltage DC input aeronautical static inverter. The proposed converter is composed of dual two-transistor forward DC-DC converter (TTFC), coupled with a single high frequency transformer. The converter operates at a fixed duty cycle ratio near unity. Zero-voltage-switching (ZVS) of the switches are realized with function of transformer leakage inductances and the parasitic capacitances of the switches. There is no voltage oscillation and voltage spike on the secondary rectifier diodes because of output filter capacitor´s clamping. Operation principle, output characteristics and ZVS condition of the proposed converter are analyzed. Experimental results obtained from a 270 V input 2 kW 100 kHz prototype are presented. The measured efficiency is 95.93% at full load.

Keywords

DC-DC power convertors; high-frequency transformers; invertors; rectifying circuits; switching convertors; zero voltage switching; 100 kHz; 2 kW; 270 V; capacitor clamping; dual two-transistor; duty cycle ratio; high frequency transformer; high voltage DC input aeronautical static inverter; high-efficiency forward DC-DC converter; leakage inductance; output filter; parasitic capacitance; secondary rectifier diode; voltage oscillation; voltage spike; zero-voltage-switching; Clamps; DC-DC power converters; Diodes; Filters; Frequency conversion; Inverters; Parasitic capacitance; Rectifiers; Switches; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicle Power and Propulsion, 2005 IEEE Conference

Print_ISBN

0-7803-9280-9

Type

conf

DOI

10.1109/VPPC.2005.1554543

Filename

1554543