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)-文庫吧資料
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【正文】 : Beijing Institute of Technology Publishing House , 1994. 71 72. [3 ] D’ Azzo J J. Linear control system analysis and design [M]. San Francisco: McGrawHill Book Company,1981. 83 92. 電動(dòng)汽車 DCDC 電源轉(zhuǎn)換器的原理、建模和控制 張承寧 , 孫逢春 , 張 旺 (北京理工大學(xué)車輛與交通工程學(xué)院 , 北京 100081) 摘要 ： 為了設(shè)計(jì)出在電動(dòng)汽車上把高壓直流電源變換成低壓直流電源的高品質(zhì) DCDC 變換器 ,采用自動(dòng)控制理論進(jìn)行指導(dǎo) . 介紹電動(dòng)汽車 DCDC 變換器原理和設(shè)計(jì) ,建模與控制方法 . 應(yīng)用階躍響應(yīng)法、頻率法研究其數(shù)學(xué)模型和控制特性 ,并且進(jìn)行分析和計(jì)算 . 實(shí)驗(yàn)結(jié)果表明 ,用這種方法所研制 的電動(dòng)汽車 DCDC 變換器輸出電壓精度高 ,抗干擾能力強(qiáng) ,調(diào)節(jié)特性快速、平穩(wěn) . 關(guān)鍵詞： 電動(dòng)汽車 。 peak overshoot σ p = 1/ 2 = 50 %。 ③ Ui0 is superimposed with d Ui that is posed by positive and negative rectangle wave impulses. The amplitude of d Ui is taken to be equal to . It should make d Uo be easy to be observed to select the rectangle wave frequency , adopting f 1 = 400 Hz 。 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 can be gained from the highvoltage power supply by a DCDC conver tor. In this paper, the main performance of the designed convertor is that the input voltage range is from DC 250 V to DC 450 V , the output voltage is DC 24 V , the maximum output current is DC 20 A , and the output precision is 1 %. 1 Principle of the Convertor The Block Diagram of the DCDC Convertor The block diagram of the DCDC convertor is showed in Fig. 1. The battery series provide the DC highvoltage input Us. The lowvoltage output of the con vertor is Uo. The setting value Ui of the convertor is equal to or is in proportion to the demanded output voltage Uo. The convertor is a closedloop negative feedbacksystem with voltage feedback. Power Switch Circuit The power switch circuit with semibridge mode is showed in Fig. 2. L1 and C1 constitute an input filter to avoid highfrequency impulses flowing bac kwards. Capacitors C2and C3 constitute the partialvoltage circuit while resist ances R1 and R2do so. IGBT1 and IGBT2 are semiconductor switch devices. C6 is a separation DC capacitor. T1 is a transformer that reduces the voltage. L2 and C7 constitute an output filter. RL is the load resistance. When the PWM signals in the reverse semiwaves are inputted onto IGBT1 and IGBT2’ s control poles , the corresponding DC voltage can be yielded from the convertor. Fig. 2 Principle circuit of power switch with semibridge mode Control Circuit The chip SG3525 is used in the PWM control circuit showed in Fig. 3. V cc is the power voltage applied to the chip, it is V. A
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