Single-Stage Non-Contact Power System Having High Power Factor With Gap and Load Detection

• Main Authors: Bo-Guang Jhu, 朱柏光
• Other Authors: 徐國鎧
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/76928231360325446953

碩士 === 國立中央大學 === 電機工程研究所 === 95 === In this thesis, a single-stage non-contact power system having high power factor with gap and load detection is porposed. The boost converter is operated in discontinuous conduction mode (DCM) for achieving power factor correction(PFC). In order to achieve zero-voltage switching and reduce the switching loss, with half-bridge series resonant converter, the switching frequency is designed to be higher than the resonant frequency. Furthermore, this study proposed the gap and load detection mechanisms, based on electromagnetic theory. The designed non-contact power system, is able to transfer energy and signal simultaneously. Under variation of gap and load, experimental results verify that the signal of gap detection core is related to the gap and the signal of load detection core is related to the output, by varing the primary switchting frequency to controll the output voltage . The proposed system successfully meets IEC 1000-3-2 Class-D requirements and power factor can be achieved up to 0.986. The proposed single-stage non-contact power system having high power factor with gap and load detection has the advantages of simple structure, low component count, high power factor and low harmonic.