Title :
A unity power factor rectifier based on a two-cell boost converter using a new parallel-connection technique
Author :
Braga, Henrique A C ; Barbi, Ivo
Author_Institution :
Lab. de Electron. de Potencia, Univ. Federal de Santa Catarina, Florianapolis, Brazil
Abstract :
This paper applies a parallel-connection technique to a boost converter with power factor correction. By means of a small extra inductance two MOSFET-PWM cells are associated in parallel, leading to an improved performance and reliable switched converter, along with simplified layout requirements. A comparison of the structure used in this paper with some alternative techniques is also provided. A simplified mathematical analysis of the main circuit, based on the PWM-switch model, is also presented along with digital simulation results. Results from a 3 kW-70 kHz prototype operating with power-factor correction (PFC) and soft commutation show that the technique is very useful. It is capable of reducing diode reverse-recovery problems, increasing the efficiency of the converter and also improving the overall reliability
Keywords :
DC-DC power convertors; PWM power convertors; commutation; field effect transistor switches; inductance; power factor correction; rectifying circuits; switching circuits; 3 kW; 70 kHz; MOSFET-PWM cells; diode reverse-recovery problems reduction; inductance; parallel-connection technique; power factor correction; reliability; soft commutation; switched converter; two-cell boost converter; unity power factor rectifier; Digital simulation; Inductance; MOSFET circuits; Mathematical analysis; Mathematical model; Power factor correction; Pulse width modulation; Reactive power; Rectifiers; Switching converters;
Conference_Titel :
Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
Conference_Location :
Baveno
Print_ISBN :
0-7803-3500-7
DOI :
10.1109/PESC.1996.548798
