Title :
The cascade buck-boost PFC converter with soft switching
Author :
Gao, Qiang ; Fei, Lei
Author_Institution :
Dept. of Electr. Eng., Beijing Univ. of Technol., Beijing, China
Abstract :
A new cascade buck-boost topology with passive lossless snubber is proposed in this paper, it has been successfully used in PFC circuit of high voltage system. Switching losses and EMI noises are reduced by restricting di/dt of the diode reverse recovery current and dv/dt of IGBT collector-emitter voltage. The IGBT in the buck circuit operates at ZVS turn-off and ZCS turn-on. The freewheeling diode is also commutated with ZVS. An APFC prototype has been built in the laboratory to demonstrate the effects of the circuit. Power factor of this 380 VAC/600 W proof-of-prototype is 0.98 and less than 11% THD can be achieved.
Keywords :
commutation; power conversion harmonics; power factor correction; power semiconductor switches; snubbers; switching convertors; EMI noises; IGBT collector-emitter voltage; THD; ZCS; ZVS; cascade buck-boost PFC converter topology; commutation; diode reverse recovery current; freewheeling diode; high-voltage system; passive lossless snubber; power 600 W; soft switching; switching losses; Circuit noise; Circuit topology; Diodes; Electromagnetic interference; Insulated gate bipolar transistors; Noise reduction; Snubbers; Switching converters; Switching loss; Zero voltage switching; PFC; buck-boost; passive lossless snubber;
Conference_Titel :
World Non-Grid-Connected Wind Power and Energy Conference, 2009. WNWEC 2009
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4702-2
DOI :
10.1109/WNWEC.2009.5335827
