Title :
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
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 (Vg), chopper output current (IF), resonant elements values including (Cn Lr), voltage and current of filter capacitor and reactor or initial values of capacitor and reactor (Vi, It).
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;
Conference_Titel :
Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on
Print_ISBN :
0-7803-8163-7
DOI :
10.1109/ICECS.2003.1301918
