Design of High Frequency Switching Power Supply for Magnetic Generators

• Main Authors: Chia-Ming Tu, 塗家銘
• Other Authors: 黃聰亮
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/32269258100150690061

碩士 === 淡江大學 === 電機工程學系碩士班 === 94 === With the progressing of science and the popularization of electric equipments, exposed to electric magnetic field environment is increased. Although no reports have indicated that the specific electric magnetic field is danger to the living organism, the research of magnetic field’s influence on organism are also continued. Most research papers proposed that the organism should maintain a distance from the electric magnetic field in order to prevent various kinds of danger that may be caused from exposure. However, those reports mainly focused on exposure from low frequency alternating current equipment. At present, high-frequency equipments are widely used and the exposure to the high-frequency magnetic field of organism is more frequent. For this reason, this thesis emphasizes a high-frequency magnetic field environment to best conduct experiments of conclusive nature. The main goal of this thesis is to design a high-frequency power supply device to provide the magnetic field. The frequency of the high-frequency power supply is up to 125KHz to raise the efficiency and reduce the volume. By using the phase-shifted full-bridge zero-voltage-switched PWM technique, this design can reduce switching loss, component stress, and electromagnetic interferences of power semiconductor devices. In order to adjust the output power and switching frequency exactly, this thesis uses the digital pulse signals by FPGA embedded chip and VHDL to change the work period of the output voltage and control frequency. Finally, this study used Is-Spice electronic circuit software to conduct real simulation and discussion, and proved the production of high-frequency pulse signals and ZVS technique.