直流斬波電路設(shè)計(jì)-wenkub
2023-02-15 15:23:24 本頁(yè)面
【正文】 ；降壓斬波電路 ； SG3525； EXB841 ABSTRACT DC Chopper circuit (DC Chopper) is the function of the direct current (DC) to a fixed voltage or adjustable voltage direct current (DC), also known as direct dcdc Converter (DC/DC Converter). Generally refers to the dc chopper circuit directly to the direct current into another, does not include dc ac dc. Traditionally, DC DC converter includes the above two chopper circuit sort is more, including six basic chopper circuit: buck chopper circuit, boost chopper circuit, buck chopper circuit, Cuk chopper circuit, Sepic chopper circuit and Zeta chopper circuit, including the first two are the most basic circuit. On the one hand, the most widely used two kinds of circuit, on the other hand, to understand these two circuits can lay the foundation to understand the other circuit. Are bined with different basic chopper circuit, can constitute a posite chopper circuit, such as current reversible chopper circuit, bridge type reversible chopper circuit, etc. Using basic chopper circuit on the structure of the same bination, can constitute a heterogeneous multiple chopper circuit. Dc chopper circuit is widely used in dc transmission and switching power supply, is a hotspot in the field of power electronics. All control type device select insulated gate bipolar transistor (IGBT) integrated the advantages of GTR and power MOSFET, has the good properties. Has replaced the original GTR and part of the power MOSFET market, rapidly expanding application areas, the small and mediumsized power power electronics equipment has bee the dominant device. Therefore, the curriculum design topic is: the design using the control device for IGBT buck chopper circuit. Mainly discuss buck chopper main circuit, control circuit sg3525, drive circuit exb841 and protect circuit principle and design. Key words igbt； buck chopper； sg3525； exb841 目 錄 1 設(shè)計(jì)要求與方案 ................................................... 1 設(shè)計(jì)要求 ................................................... 1 課程設(shè)計(jì)目的 .......................................... 1 課程設(shè)計(jì)要求 .......................................... 1 方案確定 ................................................... 1 2 降壓斬波主電路設(shè)計(jì) ............................................... 3 BUCK 電路工作原理 ........................................... 3 主電路參數(shù)分析 ............................................. 4 3 控 制電路原理與設(shè)計(jì) ............................................... 6 控制電路方案選擇 ........................................... 6 控制電路工作原理 ........................................... 7 4 驅(qū)動(dòng)電路原理與設(shè)計(jì) ............................................... 7 驅(qū)動(dòng)電路方案選擇 ........................................... 8 驅(qū)動(dòng)電路分析與設(shè)計(jì) ......................................... 8 5 保護(hù)電路的原理與設(shè)計(jì) ............................................. 9 過電壓保護(hù) ................................................ 10 過電流保護(hù) ................................................ 10 6 電路仿真 ........................................................ 12 設(shè)計(jì)心得 ........................................................... 17 參考文獻(xiàn) ...........................
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