High Pulsed Electric Field Generators for the Applications of Sterilization

• Main Authors: Chung-Chin Lee, 李忠進
• Other Authors: Tsai-Fu Wu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/19538835431122482404

碩士 === 國立中正大學 === 電機工程研究所 === 91 === The main objective of this thesis is to design and implement high pulsed electric field generators for the applications of sterilization. In the thesis, mechanisms of microbe inactivation and characteristics of gas discharge are first discussed to determine the pulse parameters. Then, three types of generators for generating high pulsed electric fields are reviewed, and an interleaved forward converter is proposed. The primary feature of the proposed converter is in generating low-frequency high-voltage pulses without needs of switches with high-voltage ratings. As compared to a single high-voltage switch, the power devices connected in series gain the merits of lower cost and more flexibilities in hardware design. Therefore, three types of gate driving circuit for driving the series connected switches which consist of six power MOSFETs are proposed. Finally, sterilization effects of microbe existing on crop and water are presented.