Your order ' s ready . pull forward 你點(diǎn)的餐齊了,請(qǐng)往前開(kāi)
What ? - pull forward 什么? -推到前面去
The second population is pulled forwards by the propagating energetic electrons . the third energetic ion population emerg 研究了前、后表面等離子體密度標(biāo)長(zhǎng)對(duì)高能離子產(chǎn)生的影響。
Based on comparison of different dc / dc converter , push - pull forward converter ( ppf ) is selected as main system prototype 在比較多種常用拓?fù)涞膬?yōu)缺點(diǎn)后,本文選用推挽正激電路作為主電路拓?fù)洹?
The thesis focused on the dc link topology of the modulariation aviation static converter . first , the push - pull converter is developed . then , the principle of push - pull forward converter is analyzed in detail 本文主要針對(duì)模板化航空靜止變流器直流環(huán)節(jié)進(jìn)行研究,研究了推挽、推挽正激和隔離型boost三種電路方案。
Aimed to acquire high efficiency and realize high frequency of the converter , this paper takes the forepart of the aeronautical static inverter ( asi ) - dc / dc converter as research object . push - pull forward converter ( ppfc ) , which adapts to be applied in low voltage , high current input power field , is proposed and studied in this paper based on comprehend to main characters of asi and references to the development of the vrm 本文以航空靜止變流器中dc dc ? dc ac結(jié)構(gòu)的前級(jí)為主要研究對(duì)象,針對(duì)效率和高頻化問(wèn)題,在充分考慮航空靜止變流器前級(jí)dc dc特點(diǎn)的基礎(chǔ)上,借鑒國(guó)外vrm技術(shù)的發(fā)展歷程,選擇了適合于低壓大電流場(chǎng)合下工作的推挽正激電路( ppfc ) ,作為基本電路拓?fù)?,進(jìn)行了一些理論與實(shí)驗(yàn)的研究工作。
This paper introduces the fundamental and characteristic of the fuel cell , analyzes the necessity and detail scheme of adding assistant energy sources to the fuel cell power generation system . considering for the special demand of the fuel cell power generation system , this paper gives out a push pull forward converter ( ppfc ) with passive and lossless dual cdd snubber circuit 本文首先闡述了燃料電池的基本原理和性能特點(diǎn),分析了在燃料電池發(fā)電系統(tǒng)中引入輔助能源系統(tǒng)的必要性及具體的配置方案,然后針對(duì)燃料電池發(fā)電系統(tǒng)對(duì)dc / dc變換器設(shè)計(jì)的特殊要求,提出了一種加雙cdd無(wú)源無(wú)損緩沖電路的推挽正激變換器( pushpullforwardconverter , ppfc ) 。