freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

畢業(yè)設(shè)計-伺服電機svpwm在bldc電機中的應(yīng)用-資料下載頁

2025-01-17 00:43本頁面
  

【正文】 電流采樣芯片等組成。其中 DSP 產(chǎn)生的六路 PWM 信號經(jīng)放大后送給 MOSFET; 穩(wěn)壓芯片用于給 DSP供電; 7805 穩(wěn)壓芯片用于 5V 電源隔離, 788J 用于電流信號采樣。圖 是實驗中抓取的 A 相繞組的 PWM 波形。 圖 DSP 控制平臺 圖 帶死區(qū)的 PWM 波形 實驗結(jié)論:根據(jù) Q 軸電壓的給定信號的變化,實際測量 SVPWM 輸出信號的變化,觀測結(jié)果符合理論分析的結(jié)論,實驗結(jié)果是正確的。 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 23 第六章 結(jié) 論 優(yōu)化的空間矢量 PWM技術(shù)、先進(jìn)的智能功率模塊 (IPM),加上具有高性能運行 速度 的 DSP,進(jìn)一步擴大了成熟的變頻調(diào)速技術(shù)在工業(yè)控制中的應(yīng)用。但是在這個科技理論及電子器件日新月異的今天如何應(yīng)用它們?nèi)崿F(xiàn)變頻技術(shù),如何使它們在實際應(yīng)用中更實用、更安全、更節(jié)約成本、性價比更高等問題都有待進(jìn)一步解決。本文就是針對這些問題進(jìn)行設(shè)計與研究。主要工作和研究實驗成果簡述如下。 (1)介紹了直流無刷電機的調(diào)速控制,并且將 SVPWM的生成方法與其他幾種PWM輸出方法進(jìn)行了比較突出其優(yōu)點,然后重點講述了 SVPWM的生成原理。 (2)重點介紹了 SVPWM的算法的實現(xiàn)方法,要判斷其扇區(qū)、開關(guān)作用時間以及開關(guān)管的 切換順序。同時還要考慮在兩開關(guān)管切換狀態(tài)時出現(xiàn)的同時導(dǎo)通的問題,對此本設(shè)計提出了死區(qū)控制的方法,并且能夠很好的解決了問題。最后對 SVPWM的調(diào)速進(jìn)了簡單的介紹。 (3)介紹了支持 SVPWM發(fā)生器的硬件電路。簡要地介紹了 DSP芯片,詳細(xì)講述了DSP基本外圍硬件電路設(shè)計過程及設(shè)計過程中應(yīng)考慮的實際問題。硬件電路中的單片DSP的最小系統(tǒng)、電源電路等部分都經(jīng)過實際的 PCB板制作、焊制和調(diào)試。 (4)介紹了 SVPWM的具體軟件設(shè)計的方法,講述了定點 DSP的 Q格式, SVPWM控制參數(shù)的 Q格式及代碼的實現(xiàn),最后給出了 SVPWM的程序流程圖。 由于學(xué)習(xí)時間有限,本課題在以下方面還可以進(jìn)一步深入研究: (1)應(yīng)用矢量控制、直接轉(zhuǎn)矩控制等先進(jìn)的控制理論,提高系統(tǒng)控制性能。 (2)實現(xiàn)基于無速度傳感器的變頻調(diào)速系統(tǒng)。 (3)實現(xiàn)基于單片 DSP控制多電機的閉環(huán)控制系統(tǒng)。 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 24 致 謝 本設(shè)計的 硬件電路制板、 SVPWM 軟件設(shè)計 工作是在我的導(dǎo)師 XXX 講師的精心指導(dǎo)和悉心關(guān)懷下完成的,在我的學(xué)業(yè)和畢業(yè)設(shè)計中無不傾注著導(dǎo)師辛勤的汗水和心血。導(dǎo)師的嚴(yán)謹(jǐn)治學(xué)態(tài)度、淵博的知識、無私的奉獻(xiàn)精神使我深受的啟迪。從尊敬的導(dǎo)師身上 ,我不僅學(xué)到了扎實、寬廣的專業(yè)知識,也學(xué)到了做人的道理。在此我要向我的導(dǎo)師致以最衷心的感謝和深深的敬意。 在我的論文撰寫過程中, XXXX 提出了 寶貴的 意 見和建議,向他們表示深深的感謝。 在多年的學(xué)習(xí)生活中,還得到了許多學(xué)院領(lǐng)導(dǎo)和指導(dǎo)老師的熱情關(guān)心和幫助。 我也要感謝我的父母和親人,他們在我的學(xué)業(yè)中給了我莫大的鼓勵、關(guān)愛和支持。 最后,向所有關(guān)心和幫助過我的領(lǐng)導(dǎo)、老師、同學(xué)和朋友表示由衷的謝意! 衷心地感謝在百忙之中評閱我的論文和參加答辯的各位老師! XXX 二 一二年五月 于南京 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 25 參 考 文 獻(xiàn) [1] 李華德 .交流調(diào)速控制系統(tǒng) .北京 : 電子工業(yè)出版社, [2] TI公司 .TMS320F/C24X DSP Controllers Reference Guide: CPU and Instruction ,Texas Instruments,2022. [3] T1公司 .TMS320C240, TMS320F240 DSP , Texas Instruments, 2022. [4] 劉和平, 王維俊,江渝,鄧力 .TMS320LF240x DSP C語言開發(fā)應(yīng)用 .北京:北京航空航天大學(xué)出版社, [5] 楊貴杰,孫力,催乃政,等 .空間矢量脈寬調(diào)制方法的研究 .中國電機工程學(xué)報,2022, 21(5).7983 [6] 胡慶波,呂征宇 .一種新穎的基于空間矢量 PWM的死區(qū)補償方法 .中國電機工程學(xué)報, 2022, 25(3).1418 [7] 孫丹,賀益康 .基于恒定開關(guān)頻率空間矢量調(diào)制的永磁同步電機直接轉(zhuǎn)矩制 .中國電機工程學(xué)報, 2022, 25(12).112116 [8] 劉亞東,吳學(xué)智,黃立培 .改善直接轉(zhuǎn)矩控制性能的 SVPWM方法 .清華大學(xué)學(xué)報,2022, 44(7).869—872 [9] 王淑紅,基于 SVPWM 的三相無刷直流電機控制策略 .自動化博覽,2022,23(10).66 [10] 蘇彥民,李宏 .交流調(diào)速系統(tǒng)的控制策略 .北京 :機械工業(yè)出版設(shè), [11] 李寧,陳桂 .運動控制系統(tǒng) .北京 :高等教育出版社, [12] 王成元,等 .電機現(xiàn)代控制技術(shù) .北京:機械工業(yè)出版社, [13] 黃立培 .電動機控制 .北京 :清華大學(xué)出版社, [14] 李永東 .交流 電機數(shù)字控制系統(tǒng) .北京 :機械工業(yè)出版社, [15] 紀(jì)宗南 .DSP實用技術(shù)和應(yīng)用實例 .北京 :航空工業(yè)出版社, 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 26 附錄 A:硬件設(shè)計原理圖 附圖 1 主芯片及其外圍電路 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 27 附圖 2 功率電路 g an employment tribunal clai 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 28Employment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: ? you don39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。s antiracism taskforce, is in London for the Football Association39。s 150th anniversary celebrations and will attend City39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。s 21 win. Michel Platini, president of European football39。s governing body, has also ordered an immediate investigation into the referee39。s actions. 南京工程學(xué)院自動化學(xué)院本科畢業(yè)設(shè)計(論文) 29CSKA said they were surprised and disappointed by Toure39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end o
點擊復(fù)制文檔內(nèi)容
環(huán)評公示相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號-1