Two circuits , characterized by high power factor and low output voltage , are proposed . one is originated from the concept of charge pump , and the other functions in the same principle with so - called buck - boost circuits 最后提出了兩種功率因數(shù)校正的電路拓?fù)洌阂环N是由電荷泵原理引出的;另一種是基于buck - boost原理工作的電路。
This paper with the help of the m file and simulink toolbox in the matlab simulate the buck - boost circuit system dynamicly . the large amount of dynamic simulation figures given in this paper verified the correction of the results of theoretical analysis 本文利用matlab中的m文件和simulink工具對(duì)buck - boost電路系統(tǒng)進(jìn)行了動(dòng)態(tài)仿真,改變系統(tǒng)中的各個(gè)參變量,觀察并對(duì)比其動(dòng)態(tài)變化規(guī)律,文中給出了大量的仿真圖形,驗(yàn)證了理論分析的正確性。
In this dissertation , a novel bidirectional dc / dc converter ' s topology was designed , witch used in vehicle power supply systems . the converter is composed of fundamental bidirectional switch cell , using phase - shifted full - bridge zvs pwm dc / dc converter in buck circuit and using push - pull boost converter in boost circuit 文中從雙向dc dc變換基本單元入手,針對(duì)某大型車(chē)載電源系統(tǒng)設(shè)計(jì)了一種新型雙向dc dc變換器拓?fù)潆娐?,降壓變換采用移相全橋式zvs ? pwm功率變換,升壓變換采用推挽式dc dcboost功率變換。
At first , buck - boost circuit is detailed analyzed and derived strictly in the theory , and on the base , the current of the inductance and the output voltage are analyzed elaborately . when the input voltage is the ac voltage with the nomal frequency , the two variable quantity are analyzed and some conclusions are concluded by means of equal length separation methods and introducing function methods and derivative - equation methods . and this is the basis of the next proceeding 首先,對(duì)buck - boost電路進(jìn)行了嚴(yán)謹(jǐn)?shù)乩碚撏茖?dǎo),先對(duì)buck - boost電路在輸入為直流電壓時(shí)的工作情況進(jìn)行了分析;在此基礎(chǔ)上,對(duì)輸入為工頻交流電壓時(shí)的電感電流、輸出電壓作了詳細(xì)分析,利用等間距離散化方法、引入函數(shù)法、微分方程法分別對(duì)變量進(jìn)行了推導(dǎo)和總結(jié),為下一步工作奠定了理論基礎(chǔ)。