外文翻譯---電動(dòng)汽車dc-dc電源轉(zhuǎn)換器的原理、建模和控制-汽車設(shè)計(jì)-wenkub.com
2025-05-07 09:05 本頁(yè)面
【正文】 ,所以可以調(diào)節(jié)系統(tǒng)性能的快捷順暢。 2開環(huán)傳遞函數(shù)的繪制 該系統(tǒng)開環(huán)傳遞函數(shù)是被控制對(duì)象的產(chǎn)品，反饋和檢測(cè)電路和整體補(bǔ)償器的傳遞函數(shù)，我們有 G( s) = Gc ( s) Gp ( s) Gb ( s) =104/s＊ 10/(s*s/32150*32150+2**s*s/32150+1) ( 6 ) 由公式 6 該系統(tǒng)圖如圖 8 所示，曲線①和④分別獲得對(duì)數(shù)頻率特性，對(duì)數(shù)相頻特性的控制對(duì)象 Gp ( s)，曲線②和⑤ 對(duì)數(shù)頻率特性分別獲得對(duì)數(shù)相頻特性的反饋和測(cè)量電路的整體補(bǔ)償關(guān)節(jié)。 2 PID 調(diào)節(jié)器的設(shè)計(jì) 2 1 對(duì)單位階躍函數(shù)輸入的開環(huán)系統(tǒng)響應(yīng)測(cè)量 測(cè)量原理框圖如圖５所示，基本方法是描述如下：①電壓反饋信號(hào)被切斷②調(diào)定值上的芯片 SG3525采用中等價(jià)值 Uio是每個(gè)脈沖密度達(dá)到大約 特，③ Uio 與 Ui 疊加產(chǎn)生正負(fù)矩形脈沖，使 Ui 振幅等于 倍 Uio，它將會(huì)使 Uo 容易被觀察去選擇矩形波的頻率，采用 f1=400 赫茲，④ Uo 的輸出波形如圖 6 所示，當(dāng)f1=400 赫茲時(shí)，周期 T= 毫秒（ 5格），最大電壓值的時(shí)間約為 毫秒， Uo 為穩(wěn)定電壓幅值時(shí)為 1ms,峰 值超調(diào)為 1 格，每格在垂直方向代表 5V，通過(guò)這種方法，系統(tǒng)響應(yīng)的數(shù)據(jù)輸入到一個(gè)單位階躍函數(shù)可以得到如下：峰值時(shí)間 tp= 峰值超調(diào) σ p = 1/ 2 = 50 %。 圖 41GBT 驅(qū)動(dòng)電路原理 2建模和控制 2連接在腳 1和腳 9 之間適當(dāng)?shù)碾娮韬碗娙輰?shí)現(xiàn)直流 — 直流變換器的補(bǔ)償。 2 功率開關(guān)電路 圖 2 所示電路的電源開關(guān)半橋接模式， L1 和 C1 構(gòu)成一個(gè)輸入濾波器來(lái)避免高頻脈沖反流， C2 和 C3 電容器與電阻 R1 和 R2分別構(gòu)成部分電壓回路， T1和 T2 是半導(dǎo)體開關(guān)， C6是一個(gè)分離直流電容器 ， T1是一個(gè)減少電壓的變壓器， L2 和 C7構(gòu)成一個(gè)輸出過(guò)濾器， RL 是負(fù)載電阻。 1 直流 直流變換器的原理框圖 直流 直流轉(zhuǎn)換器 的 原理框圖 如 圖 1 所示， 電池 組 提供直流高壓輸入 Us， 低壓變頻器的輸出 是 Uo。一個(gè)是直流高壓電源采用高功率設(shè)備 ,如牽引電機(jī)和空調(diào)等。 DCDC 變換器 。 ④ The output waveform of Uo ( = Uo 0 + d Uo ) is shown in Fig. 6. As shown in Fig. 6 when f 1 = 400 Hz , period T = ms (5 grills) , the time for the maximum voltage value is about grills. d Uo’ s stable voltage amplitude is grills. Peak overshoot is 1 grill. Every grill in the vertical direction represents 5 V. By this way the data of systemresponse to a unit stepfunction input can be obtained as follows : peak time tp = ms 。 mathematics model 。外文原文 Principle, Modeling and Control of DCDC Convertors for EV ZHAN G Chengning , SUN Fengchun , ZHAN G Wang (School of Vehicle and Transportation Engineering , Beijing Institute of Technology , Beijing 100081) Abstract : DCDC convertors can convert the EV’ s highvoltage DC power supply into the lowvoltage DC power supply. In order to design an excellent convertor one must be guided by theory of automatic control. The principle and the method of design, modeling and control for DCDC convertors of EV are introduced. The method of the systemresponse to a unit stepfunction input and the frequencyresponse method are applied to researching the convertor’s mat hematics model and control characteristic. Experiments show that the designed DCDC convertor’ s output voltage precision is high , the antijamming ability is strong and the adjustable performance is fast and smooth. Key words: EV 。 Bode drawing CLC number : U 46972 Document code : A Generally there are two power supplies in EV. One is the DC highvoltage power supply that is used by high power devices such as traction motors and air conditioners etc. The other is the DC lowvoltage power supply that is usually used in some control circuit and lowvoltage electrical devices such as the inst rument and lighting. It s rating voltage is 24 V or 12 V. The lowvoltage power supply
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