Frequency & duty cycle control considerations for soft-switching buck chopper

Author

Hosseini, S.H. ; Almaleki, M.

Author_Institution

Dept. of Electr. Eng., Tabriz Univ., Iran

Volume

2

fYear

2003

fDate

14-17 Dec. 2003

Firstpage

842

Abstract

This paper presents considerations on the switching frequency and duty cycle and operating equations of soft-switching buck chopper. These considerations are discussed and applied to selected soft-switching families such as ZVS-QRC, ZCS-QRC, ZVS-QSW-CV ZCS-QSW-CC, ZVT-PWM and ZCT-PWM (J.Abu. Qahouq and I. Batarseh, IEEE Trans. Power Electron., vol. 9, no. 5. pp. 684-691, 2002). The limitations on switching frequency and duty cycle are derived in terms of: chopper input voltage (V_g), chopper output current (I_F), resonant elements values including (C_n L_r), voltage and current of filter capacitor and reactor or initial values of capacitor and reactor (V_i, I_t).

Keywords

DC-DC power convertors; choppers (circuits); frequency control; power filters; power system control; ZCS-QRC; ZCS-QSW-CC; ZCT-PWM; ZVS-QRC; ZVS-QSW-CV; ZVT-PWM; chopper input voltage; chopper output current; duty cycle control; filter capacitor current; filter capacitor voltage; frequency control; operating equations; quasi-resonant-converter cells; quasi-square-wave cells; reactor current; reactor voltage; resonant elements values; soft-switching buck chopper; soft-switching families; switching frequency; transition PWM cells; Capacitors; Choppers; Equations; Resonance; Space vector pulse width modulation; Switched-mode power supply; Switches; Switching circuits; Switching frequency; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on

Print_ISBN

0-7803-8163-7

Type

conf

DOI

10.1109/ICECS.2003.1301918

Filename

1301918