The high-voltage high-power multilevel converter and AC motors drive techniques are summarized compendiously for domestic and overseas studies in the prolegomenon of this dissertation. The evolution and research status of multilevel converter topologies are analyzed, the development of AC variable speed techniques and the characteristic of DTC are discussed, also, the aim and significance for the research are demonstrated. In this dissertation, SVPWM pattern and implement method have been addressed comprehensively for three-level NPC inverter.

本文緒論部分針對(duì)國(guó)內(nèi)外高壓大容量多電平變換技術(shù)和交流傳動(dòng)控制技術(shù)作了簡(jiǎn)要綜述日本精品乱伦一区二区三区视频，著重分析了多電平拓?fù)浣Y(jié)構(gòu)的發(fā)展和研究現(xiàn)狀人人操人人看人操，討論了交流調(diào)速的發(fā)展和直接轉(zhuǎn)矩控制技術(shù)的特點(diǎn)免费观看WW红色片三级片，指出本文選題的目的和意義全黄毛片。

This is the Digital Signal Processing Courseware the first part, that is part of prolegomenon.

這是數(shù)字信號(hào)處理課件的第一部分天天日天天干天天天添，也就是緒論部分欧美黄片天天在线观看。

The first part is prolegomenon. Clear definition of job promotion and the significance of this paper.

第一部分是緒論，明確職務(wù)晉升的定義以及本文的研究意義五月丁香花婷婷综合。

The prolegomenon part shows the need of research, research significance and research methods.

緒論明確了研究的必要性和研究意義男女人精品视频站在线观看、研究方法。

The first part is prolegomenon, which sets forth the background and questions, methods and design of the paper.

第一部分為緒論亚洲精品一，主要闡述研究的背景與問(wèn)題亚洲色图五月天综合、方法與設(shè)計(jì)。

This dissertation is divided into seven main chapters of following major elements: Chapter 1, prolegomenon.

論文的研究?jī)?nèi)容主要分為七章网页升级自拍偷拍，各章主要內(nèi)容如下：第一章98在线视频，緒論。

The first chapter is a prolegomenon, it introduces the background, meaning, researching route and meathod of this paper.

第一章是緒論欧美激情动态图，主要介紹了本文的背景av男人的天堂综合网、選題意義、研究思路和方法一级a片操逼逼免费观看视频。

This paper consists of three parts: the prolegomenon, the main body and the tag.

全文分為導(dǎo)論久久精品视频还得看这里、正文和結(jié)語(yǔ)三個(gè)部分。

The dissertation consists of a prolegomenon, six chapters and a conclusion.

本論文分為緒論、結(jié)論和六個(gè)章節(jié)三级免费观看网站。

Prolegomenon set forth the origin of e-commerce and e-commerce significance.

緒論中闡述了電子商務(wù)的起源與電子商務(wù)的意義韩国午夜理伦三级2020不卡。