Development of the digital dc - speed controller of the pulse load 脈動型負載的數(shù)字式直流調(diào)速器
Based on the specification , the right phase control thyristor is chosen and the series number of thyristor is calculated . the paper also calculates the power loss of thyristor under the pulsing load , choosing the heat sink and forecast the temperature rising 以此為基礎,合理選擇了所用的高壓晶閘管元件,計算了所需元件的串聯(lián)個數(shù),對類似于脈沖負荷下的晶閘管耗散功率進行了計算,并選擇了元件的散熱器,預計了元件的溫升。
In the dissertation ' s chapter 3 to chapter 5 , the mechanical and physical performances of the engineering plastics are analyzed , the failure mode and the designing computing methods of engineering plastics member suffering the static load , dynamic load , impact load , pulse load , are studied . by the practice application and ball firing experiment of the engineering plastics key piece in the weapons , the precious experiences , for engineering plastics application and confirmation of the material performances guideline in the weapons , are obtained 論文的第三章至第五章,分析了工程塑料物理機械性能,研究了受靜載荷、動載荷、沖擊載荷及脈沖載荷下工程塑料構(gòu)件的失效模式和設計計算方法,通過工程塑料在槍械關(guān)鍵受力結(jié)構(gòu)件上的實際應用和實彈射擊試驗,取得了寶貴的經(jīng)驗,為高性能工程塑料在槍械上的應用和材料性能指標的確定奠定了基礎。
Besides , practical load of the ghes varies with time . the variable load of ghes is decomposed as a series of pulse load , and the superimposition principle is employed to obtain the real temperature response of the ghes on basis of the theoretical solutions of a single borehole experiencing a constant heat flux 利用把具有摘要, . . . . . . . . . . . . . . .復雜邊界條件和熱源的問題分解為許多較簡單的問題的方法,把具有多個鉆孔的地熱換熱器溫度場化作許多單孔溫度場的益加,建立了多鉆孔地熱換熱器溫度場亞加模型。