Title :
High-power step-up converter with high efficiency and fast output voltage dynamics
Author :
Kang, Jeong-il ; Roh, Cbung-Wook ; Moon, Gun-Woo ; Youn, Myung-Joong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
A high-power step-up converter, which is based on the dual converter topology and is operating at a constant duty cycle, is proposed. It employs an auxiliary circuit and the output voltage is controlled with a phase-shift between two dual converters. It features a high efficiency due to the greatly reduced switch turn-off stress and a fast output voltage response with low influence of the right half-plane (RHP) zero. A 50 kHz 800 W 350 Vdc prototype with an input voltage of 20-32 Vdc has been constructed to validate this converter. The proposed converter compares favorably with the conventional pulse-width-modulated (PWM) counterpart and is considered well suited to high-power step-up applications.
Keywords :
DC-DC power convertors; voltage control; 20 to 32 V; 350 V; 50 kHz; 800 W; DC/DC power conversion; auxiliary circuit; constant duty cycle operation; dual converter topology; fast output voltage dynamics; fast output voltage response; high efficiency; high-power step-up converter; output voltage control; phase-shift; right half-plane zero; switch turnoff stress reduction; Circuit topology; Filters; Moon; Power conversion; Prototypes; Pulse width modulation; Pulse width modulation converters; Stress; Switches; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 2001. Proceedings., 2001 4th IEEE International Conference on
Print_ISBN :
0-7803-7233-6
DOI :
10.1109/PEDS.2001.975430
