Investigation of Conduction Electro-Magnetic Interference in Power Supply System

• Main Authors: Wu.Ying.Hau, 吳英豪
• Other Authors: 蔡明村
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/18433973138802337323

碩士 === 南台科技大學 === 電機工程系 === 94 === This paper presents a 3kVA Line-Interactive uninterruptible power supplies research which is based on the transformer structure that eliminates the conducted electromagnetic interference. It uses the changes of the transformer winding structures to improve conducted EMI problem without increase of the volume of the EMI filter. The advantage is to achieve a simple and low cost . Three kinds of techniques for transformer winding structures have been researched, including independence winding, sandwich winding, and sandwich with shield winding. Apart from comparing the discrepancy of noise restrained among various EMI component, the influences of the noise strength and noise conduction path which is related to the electrical character of transformer have been presented at this paper. The test data for the EMI solution was followed CISSP class B standards and double check by lab of EMI licensable pass.