Title :
Zero voltage switching AC/DC/AC converter using modified high frequency DC-link
Author :
Woo, Byeong-Ok ; Kim, In-Dong ; Cho, Gyu-Hyeong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
Abstract :
A power converter that is based on high-frequency links, uses unidirectional switches and operates in the zero voltage switching mode is described. It is shown that the converter´s reactive elements serve as waveshaping or snubbing functions around the switching operation and are minimally involved in the power transfer. Consequently, the volt-ampere ratings of the reactive elements and switching devices are reduced, and the losses due to the effective series resistance of the reactive elements are decreased. The control method of this converter is to regulate the phase voltages of output capacitors, which operate as equivalent voltage sources. Waveforms obtained from digital simulations of the converter are presented.<>
Keywords :
equivalent circuits; power convertors; switching; voltage control; AC/Dc/AC power convertors; HF DC link; digital simulations; equivalent voltage sources; output capacitors; phase voltages; reactive elements; series resistance; snubbing; unidirectional switches; waveshaping; zero voltage switching; Analog-digital conversion; Capacitors; Frequency conversion; Paramagnetic resonance; RLC circuits; Stress; Switches; Switching converters; Voltage control; Zero voltage switching;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152343
