Title :
A new quasi-single-stage isolated three-phase ZVZCS buck PWM rectifier
Author :
Wang, Kunrong ; Lee, Fred C. ; Boroyevich, Dushan ; Yan, Xinxiang
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
A new quasi-single-stage isolated three-phase zero-voltage/zero-current-switched (ZVZCS) buck PWM rectifier for high-power off-line applications is proposed. It consists of a three-phase buck bridge switching under zero-current and a phase-shift-controlled full-bridge with ZVZCS, while no intermediate DC-link is involved. Input power and displacement factor control, input current shaping, tight output voltage regulation, high-frequency transformer isolation, and soft-switching for all the power devices are realized in a unified single stage. A 6 kW, 50 kHz prototype for telecommunication applications has been developed and preliminary tests for the prototype validates the operation of the proposed rectifier. Simple control, high efficiency and fast dynamics are among its salient features
Keywords :
PWM power convertors; bridge circuits; high-frequency transformers; phase control; power control; rectifying circuits; switching circuits; telecommunication power supplies; voltage control; 50 kHz; 6 kW; Input power control; displacement factor control; fast dynamics; high efficiency; high-frequency transformer isolation; high-power off-line applications; input current shaping; isolated three-phase ZVZCS buck PWM rectifier; output voltage regulation; phase-shift-controlled full-bridge; quasi-single-stage rectifier; soft-switching; telecommunication applications; three-phase buck bridge; zero-current-switching; zero-voltage switching; Filtering; Matrix converters; Power harmonic filters; Prototypes; Pulse width modulation; Rectifiers; Telecommunication control; Topology; Voltage control; Zero voltage switching;
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.1996.548619
