Title :
Analysis of three-level full -bridge ZVZCS PWM converter with simple auxiliary circuit
Author :
Songboonkaew, J. ; Jangwanitlert, A.
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
This paper proposes a three-level full-bridge ZVZCS converter with ZVS turn on and ZCS turn off conditions using a simple auxiliary circuit on secondary side. The primary current is reset in order to reduce circulating current in transformer and voltage stress and spike voltage of diode bridge rectifier on secondary side. The control strategy uses double phase-shift PWM to control output voltage. Therefore, the lower breakdown voltage of diodes, the smaller LC filter. The simple auxiliary circuit can help to maintain output voltage. Also, The experimental and simulation results from a 100 V/10 A, 60 kHz are also presented, which is used to verify the theoretical analysis.
Keywords :
LC circuits; PWM power convertors; bridge circuits; phase control; rectifiers; switching convertors; voltage control; zero current switching; zero voltage switching; LC filter; ZCS turn-off condition; ZVS turn-on condition; auxiliary circuit; breakdown voltage; circulating current reduction; current 10 A; diode bridge rectifier; double-phase-shift PWM control; frequency 60 kHz; output voltage control; primary current; spike voltage; three-level full -bridge ZVZCS PWM converter; transformer; voltage 100 V; voltage stress; Capacitance; Capacitors; Pulse width modulation; Simulation; Switches; Zero current switching; Zero voltage switching; ZVZCS converter; double phase-shift PWM; three-level full-bridge;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2012 9th International Conference on
Conference_Location :
Phetchaburi
Print_ISBN :
978-1-4673-2026-9
DOI :
10.1109/ECTICon.2012.6254250
