Fully-Digitalized Interleaved Boost Converter with Zero Current Transition

• Main Authors: Bo-Jun Yang, 楊博鈞
• Other Authors: 胡國英
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/gxr87n

碩士 === 國立臺北科技大學 === 電機工程系研究所 === 98 === In this thesis, a zero-current-transition technique is presented and applied to two-phase interleaved boost converter, whose main switch constructed by one insulated gate bipolar transistor (IGBT) has a problem in the current tail during the turn-off period. Hence, the proposed zero-current-transition (ZCT) technique is used to reduce the switching loss created from the current tail. At the same time, the efficiency at light load is upgraded by adjusting the turn-off instants and turn-on times of the auxiliary switches. Besides, two phases are interleaved with a phase difference of 180° and controlled by a current sharing strategy, so as to make the input current distributed between the two phases as evenly as possible. Furthermore, a new current sharing method is adopted here in such that only one current sensing circuit is required to obtain information on currents in two main switches. In this paper, the basic operating principles and mathematical deduction for the proposed topology are firstly described in detail, secondly its feasibility of is evaluated by IsSpice and Active-HDL/MATLAB/Simulink/SimPowerSystems, and finally a prototype with a one FPGA chip utilized as a system control kernel is provided to demonstrate its effectiveness.