Title :
Full-wave boost rectifier by ZCS-PWM control with reduced conduction losses
Author :
Wang, Chien-Ming ; Hsieh, Guan-Chyun
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A new single-phase full-wave boost rectifier (FWBR) with high power factor correction implemented by zero-current-switching pulse-width-modulation (ZCS-PWM) is presented. The presented FWBR is configured by two resonant cells and without the front-end bridge rectifier for pre-regulating the input current to achieve high power factor correction. The two resonant cells form the ZCS. With the ZCS-PWM control, the FWBR dissipates only two conduction losses of the power switches more efficiently than the conventional rectifier. Seven transition states for describing the behavior of the ZCS-PWM FWBR during one switching cycle of the positive-half period of the line is described. A mathematical model for describing each state is built. With this PWM-switch model, a small-signal model is established for system analysis. The control strategy and the design consideration for implementing the system are also explored. A design example of a 600-W ZCS-PWM FWBR is implemented and examined, which provides high power efficiency of 95% and high power factor of nearly 0.95
Keywords :
AC-DC power convertors; PWM power convertors; bridge circuits; power factor correction; rectifying circuits; resonant power convertors; switching circuits; 600 W; 95 percent; ZCS-PWM control; control strategy; design consideration; input current pre-regulation; mathematical model; power factor correction; resonant cells; single-phase full-wave boost rectifier; small-signal model; switching cycle; zero-current-switching; Bridges; Control systems; Mathematical model; Power factor correction; Power system modeling; Pulse width modulation; Reactive power; Rectifiers; Resonance; Zero current switching;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-3932-0
DOI :
10.1109/IECON.1997.672023