【文章內(nèi)容簡(jiǎn)介】 變頻器提供了過(guò)壓、過(guò)流、斷相、接地等一系列保護(hù)功能，用戶(hù)可根據(jù)實(shí)際情況選取相應(yīng)功能。 R1——設(shè)置成“變頻器故障”，變頻器正常工作時(shí)，常閉點(diǎn)斷開(kāi)，故障時(shí)，常閉點(diǎn)閉合； R2——設(shè)置成“到頻率閾值”，變頻器輸出工頻，或達(dá)到設(shè)定值時(shí)，常開(kāi)點(diǎn)閉合； R3——設(shè)置成“變頻器運(yùn)行”，變頻器運(yùn)行時(shí)，常開(kāi)點(diǎn)閉合，停運(yùn)時(shí)，常閉點(diǎn)閉合； LI1——輸入邏輯為“1”時(shí)，變頻器運(yùn)行，輸入邏輯為“0”時(shí)，變頻器停運(yùn)； 第七章 常見(jiàn)故障分析 過(guò)流故障可分為加速、減速、恒速過(guò)電流。其可能是由于變頻器的加減速時(shí)間太短、負(fù)載發(fā)生突變、負(fù)荷分配不均，輸出短路等原因引起的。這時(shí)一般可通過(guò)延長(zhǎng)加減速時(shí)間、減少負(fù)荷的突變、外加能耗制動(dòng)元件、進(jìn)行負(fù)荷分配設(shè)計(jì)、對(duì)線(xiàn)路進(jìn)行檢查。如果斷開(kāi)負(fù)載變頻器還是過(guò)流故障，說(shuō)明變頻器逆變電路已環(huán)，需要更換變頻器。 過(guò)載故障包括變頻過(guò)載和電機(jī)過(guò)載。其可能是加速時(shí)間太短，電網(wǎng)電壓太低、負(fù)載過(guò)重等原因引起的。一般可通過(guò)延長(zhǎng)加速時(shí)間、延長(zhǎng)制動(dòng)時(shí)間、檢查電網(wǎng)電壓等。負(fù)載過(guò)重，所選的電機(jī)和變頻器不能拖動(dòng)該負(fù)載，也可能是由于機(jī)械潤(rùn)滑不好引起。如前者則必須更換大功率的電機(jī)和變頻器；如后者則要對(duì)生產(chǎn)機(jī)械進(jìn)行檢修。 　　 　　 說(shuō)明變頻器電源輸入部分有問(wèn)題，需檢查后才可以運(yùn)行。結(jié)束語(yǔ) 變頻調(diào)速技術(shù)作為高新技術(shù)、基礎(chǔ)技術(shù)、和節(jié)能技術(shù)，己經(jīng)滲透到經(jīng)濟(jì)領(lǐng)域的所有技術(shù)部門(mén)中。變頻調(diào)速正在逐步地成為電氣傳動(dòng)的中樞。它取代著變極調(diào)速、滑差調(diào)速、整流子電機(jī)調(diào)速、液力藕合器調(diào)速、串級(jí)調(diào)速及直流調(diào)速。除了節(jié)電外(12 70%)，更重要的是，帶來(lái)了增產(chǎn)、降耗、優(yōu)質(zhì)的效果，深受設(shè)計(jì)、工程、操作人員歡迎，社會(huì)效益非常顯著，變頻調(diào)速確實(shí)是節(jié)能、增產(chǎn)、降耗、優(yōu)質(zhì)的好技術(shù)，是邁入21世紀(jì)的首要傳動(dòng)技術(shù)，利國(guó)利民。 為期兩個(gè)月的畢業(yè)設(shè)計(jì)即將結(jié)束了，經(jīng)過(guò)努力，我順利的完成了這次畢業(yè)設(shè)計(jì)。本次畢業(yè)設(shè)計(jì)工作是對(duì)我大學(xué)所學(xué)知識(shí)的一個(gè)總結(jié)，在這期間，無(wú)論是資料的查閱、調(diào)研、方案的論證及設(shè)計(jì)都給我的專(zhuān)業(yè)素質(zhì)、個(gè)人能力的培養(yǎng)提供了一個(gè)難得的機(jī)會(huì)，令我回顧這些天來(lái)的設(shè)計(jì)過(guò)程，我學(xué)到許多實(shí)際問(wèn)題的解決方法，為以后在工作崗位上的繼續(xù)深造打下了基礎(chǔ)。我們從接受知識(shí)到選用知識(shí)來(lái)解決問(wèn)題，必須通過(guò)反復(fù)鍛煉和實(shí)踐，設(shè)計(jì)便是學(xué)生選用自己所學(xué)課程的知識(shí)來(lái)解決實(shí)際問(wèn)題的一次很好的全面的鍛煉過(guò)程。為我們以后踏上工作崗位，打下了堅(jiān)實(shí)的基礎(chǔ)。 最后，感謝學(xué)校安排的此次畢業(yè)設(shè)計(jì)。致謝 首先衷心感謝我的指導(dǎo)老師!她學(xué)識(shí)淵博，治學(xué)嚴(yán)謹(jǐn)，勤奮敬業(yè)，使我于耳濡目染中受益匪淺。設(shè)計(jì)期間，老師對(duì)我傾注了大量的心血，不斷給我方向性的指導(dǎo)和建議，同時(shí)也不斷鼓勵(lì)我獨(dú)立思考，提出自己的見(jiàn)解，鍛煉我獨(dú)立的科研能力，這一切都將對(duì)今后的工作和生活產(chǎn)生重要的積極影響。特此在本論文完成之際，對(duì)老師的精心指點(diǎn)和諄諄教誨表示崇高的敬意和衷心的感謝! 對(duì)那些在大學(xué)期間給予我知識(shí)和指導(dǎo)的老師，給予我?guī)椭椭С值耐瑢W(xué)，表示真誠(chéng)的感謝和由衷的敬意。 最后，感謝我的母校，是您使我在大學(xué)期間接受良好的教育，無(wú)論我身在何處都以“重德、敦品、篤學(xué)、躬行”為訓(xùn)，無(wú)論走到哪里都會(huì)踏踏實(shí)實(shí)做事、堂堂正正做人，為社會(huì)做貢獻(xiàn)!參考文獻(xiàn)[1][M].北京:機(jī)械工業(yè)出版社，2000.[2]王廷才，[M].北京:機(jī)械工業(yè)出版社，.[3][M].北京:冶金工業(yè)出版社，1984.[4][M].北京:機(jī)械工業(yè)出版社，2000.[5]黃元培，[M].人民郵電出版社，1998.[6]附錄一英文文獻(xiàn)：Frequency Variation Speed Control The Popularity and Prospect of Frequency Variation Speed ControlThe electrical machinery exchange frequency conversion velocity modulation technology is the electricity saving, the improvement technical process improves the product quality and the improvement environment, the impetus technology advancement one main method now The frequency conversion velocity modulation by its outstanding velocity modulation and the braking quality, the high efficiency, the high power factor and the electricity saving effect, the widespread applicable scope and other many merits by the domestic grandfather was thought most has the development future velocity modulation way. The electrical transmission control system usually by the electric motor, the control device and the information installs 3 parts to be posed, the electrical transmission relates uses the electric motor by to save the electrical energy and to control the machinery reasonably the operating condition, the realization electrical energy mechanical energy transformation, achieves, the high production, the low consumption goal high quality. The electrical transmission divides into does not modulate velocity and modulates velocity two big kinds, the velocity modulation is divided the exchange to modulate velocity and to direct current modulates velocity two ways. The variable speed motor directly does not supply power by the electrical network But the machinery which does not modulate velocity along with electric power electronic technology development this kind of original manuscript more and more many changes to the velocity modulation transmission by to save the electrical energy The improvement product quality, enhances the output Therefore the velocity modulation transmission is an important profession, already obtained the country to take, at present had certain scale.In recent years exchanged in the velocity modulation most to be active, to develop quickest is the frequency conversion velocity modulation technology, the frequency conversion velocity modulation is exchanges the velocity modulation foundation and the branch content. The last century transformer appearance causes the change voltage to bee very much easy, thus has acplished a huge electric power profession. Since long ago, the alternating current frequency always is fixed, the frequency conversion velocity modulation technology appearance causes the frequency to bee may the full use resources.In this recent 10 years, the frequency conversion technology application has the very big development in our country, and obtained the good effect to be possible to say, the frequency conversion technology has accepted for the majority users, but had no alternative but to point out, our country in frequency conversion technology application aspect, with developed country level Shang You very big disparity. At present, the AC motors we are using now use frequency variation speed control only about 6%, but the developed country is 60%~70%, Japan on air blower, water pump frequency conversion velocity modulation use rate is 10%, but our country is less than %, In Japan airconditioner using frequency variation technique rate is 70%, but our country39。s only then just started Embarks from this reality, frequency conversion technology remain have the very big development space, we should plete the promoted application work doggedly.And with the constant development of control technique and control avenue, frequency variation speed controlled has developed the vector controlled frequency variation velocity modulation, by controlling the AC motor inside act for shunt DC motor field coper’s flux, to enhance the permanent torque output scope and static and dynamic character, make the AC motor frequency variation speed controlled system superior to DC motor voltage variation speed controlled system. For simplifying the control system, reducing the fault rate, there has developed a vector controlled frequency variation speed control without speed sensor which based on the vector controlled frequency variation speed co