Development of the digital dc - speed controller of the pulse load 脈動型負(fù)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(chǔ),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(fù)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(yù)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(shè)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(yīng)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(yīng)用和材料性能指標(biāo)的確定奠定了基礎(chǔ)。
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(fù)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?zé)釗Q熱器溫度場化作許多單孔溫度場的益加,建立了多鉆孔地?zé)釗Q熱器溫度場亞加模型。