橋式斷路 的英文怎麼說
中文拼音 [qiáoshìduànlù]
橋式斷路
英文
bridge-cut-off-
From the view point of the whole topologies of current mode hfl inverters, two topologies of half - bridge and push - pull current mode hfl inverters are proposed, which are composed of four power switches. hfl inverters in discontinuous current mode ( dcm ) are extended to those in continuous current mode ( ccm )
從完善電路拓撲和降低成本的角度出發，本文提出了兩種結構的電流源高頻鏈逆變電路，它們分別是由四個功率管組成的半橋和推挽雙向電流源高頻鏈單級逆變電路，並將工作在電感電流斷續模式的逆變電路擴展到電感電流連續模式。5 by using multi - window programming technology to combine vc + + with autocad, this thesis implemented comparison of plane, profile and across section, interactive design of profile, railway location by across section and setting location of bridge and tunnel. 6 this thesis expounded itself viewpoint on application model of profile optimization in scrlid, and has been used in system development. 7 by putting forward the summaries on the application model of professional design, this thesis established mathematics model of calculating terrain height of profile and across section, automatic setting location of the bridge and the tunnel
2 、用面向對象的數據封裝和繼承技術實現了項目管理和方案數據的安全保護； 3 、選擇應用vc + + dao數據庫應用技術，完成了方案比選共用數據庫的開發； 4 、用autocadobjectarx定製實體技術，實現了線路平面拖放式交互設計； 5 、用vc + +與autocad相結合的多窗口編程技術，實現了平面、縱斷面、橫斷面三種圖形的對比顯示，實現了縱斷面交互設計、橫斷面定線和橋隧工程設置； 6 、就縱斷面優化在線路方案比選工作中的應用模式提出了自己的觀點，並在系統開發中得到應用； 7 、總結專業設計應用模式，建立了內插縱橫斷面地面高程、自動設橋、自動設隧數學模型。In the fourth chapter, based on the analysis and design of some modules closely relating to interactive design, the thesis completes the development of the railway location interactive design subsystem, and these modules are : railway horizontal line interactive design, comparison of plane, profile and across section, automatic and interactive design of profile, designing railway location by across section and setting location of the bridge and the tunnel
第三章分析了線路方案比選工作過程中所涉及的數據情況以及數據管理方法，完成了方案比選綜合數據管理子系統的開發工作，第四章通過對線路平面交互設計、內插縱橫斷面地面高程、縱斷面自動與交互設計、橫斷面定線、橋隧工程設置等與交互設計密切相關的重點模塊的分析與設計，完成了互動式線路設計子系統的開發。With the designing and building of yichang yangtse river highway bridge, a single - span suspension bridge with main span of 960m, some technical problems such as the layout of structural system of the suspension bridge, the type of cross section of stiffening steel box girder, the structural system of the anchor and the cracking - resistant techniques of the bulky concrete anchor have been studied in the present thesis. some valuable conclusions have been achieved that provided a substantial support for the successful completion of the bridge. the thesis contains five chapters
本文以湖北宜昌長江公路大橋（主跨為960m的單跨懸索橋）的設計與施工為背景，對大跨懸索橋設計與施工中的若干問題如懸索橋結構的合理布置、加勁鋼箱梁斷面型式的合理選取、錨碇結構的合理確定以及錨碇大體積混凝土設計與施工的綜合防裂技術等進行了研究，取得了一批富於實用價值的研究成果，為宜昌長江公路大橋的順利建成提供了卓有成效的技術支持。Thirdly, the snubbers are designed to compress the switching voltage transient. when igbt is abruptly turned off, trapped energy in the circuit stray inductance is dissipated in igbt, causing a voltage overshoot and damaging igbt. this paper analyzes the principle of the snubber and discusses the impact of the parameters of the snubber on voltage overshoot
針對igbt工作過程中出現的電壓尖峰、電流尖峰和大的開關損耗問題，本文首先從理論上詳細分析了igbt逆變橋緩沖電路的工作原理，推導出緩沖電路各元件的參數計算公式，討論了緩沖電路各元件參數對關斷電壓波形的影響並進行了模擬分析。In the third chapter, study on the rational cross section of steel stiffening box girder for the suspension bridge, through the fully comparative study with the ordinary hexagon streamlined steel stiffening box girder widely used in the present suspension bridges at home and abroad and taking the reality in the bridge into account, a updated streamlined steel stiffening box girder with fim has been developed and applied to the bridge successfully
在第3章?大跨懸索橋鋼箱梁合理結構型式研究中，對現代大跨懸索橋通常所採用的鋼加勁梁的斷面型式進行了比較研究，特別是對普通的六邊形流線型箱形斷面和本文提出的魚鰭型流線型箱形斷面從結構受力和經濟性等方面進行了分析比較，為後者在宜昌長江公路大橋上的成功應用提供了可靠依據。First, this paper analyzes the principle of the snubber circuit of igbt inverter in detail, and the parameter of the snubber circuit components are derived. it also analyzes the twice voltage peak of the snubber circuit during the period of turnoff and discusses the impact of the parameter of the snubber circuit components on the waveform of turnoff. the reference materials for the snubber circuit design are proivided theoretically in this paper. futhermore. it analyzes a soft switching circuit that suits pulse power supply
本文首先從理論上詳細分析了igbt逆變橋緩沖電路的工作原理，推導出緩沖電路各元件的參數計算公式，分析了緩沖電路在關斷過程中的兩次電壓尖峰，討論了緩沖電路各元件參數對關斷電壓波形的影響，為緩沖電路的設計提供了理論上的依據。分享友人