【正文】 繞組銅凈重銅線總重硅鋼片重磁極鋼片重從上方的表格可以看出，方案二與方案一相比，每槽導(dǎo)體數(shù)增加了一個(gè)，氣隙磁密并沒(méi)有改變。三方案中的勵(lì)磁繞組電密相比，方案一與方案三基本相同，方案二比其他方案要高，經(jīng)研究發(fā)現(xiàn)，方案二如果與其他方案勵(lì)磁繞組電密相同，銅線總重會(huì)增加。再結(jié)合表51的材料用量可以發(fā)現(xiàn)，若想增加同步電動(dòng)機(jī)的效率，就不要考慮材料的節(jié)省。經(jīng)過(guò)多次選取線規(guī)以及計(jì)算發(fā)現(xiàn)，線規(guī)S只能取一個(gè)值，這也就使得后期選取三方案時(shí)遇到了一定的困難。當(dāng)時(shí)心急如焚，反復(fù)查找公式中有關(guān)參數(shù)進(jìn)行修改，最后在導(dǎo)師的幫助下減小了轉(zhuǎn)子內(nèi)徑才得以通過(guò)。同步電動(dòng)機(jī)變頻調(diào)速的原理以及所用的變頻裝置和異步電動(dòng)機(jī)變頻調(diào)速系統(tǒng)基本相同，現(xiàn)就異步電動(dòng)機(jī)的變頻調(diào)速系統(tǒng)的基本控制類型進(jìn)行說(shuō)明。（2）基頻以上調(diào)速在基頻以上調(diào)速時(shí)，頻率應(yīng)該從向上升高，但定子電壓卻不可能超過(guò)額定電壓，最多只能保持=，這將迫使磁通與頻率成反比地降低。為了獲得高動(dòng)態(tài)性能，同步電動(dòng)機(jī)變頻調(diào)速系統(tǒng)可以采用矢量控制，通過(guò)坐標(biāo)變換，把同步電動(dòng)機(jī)等效成直流電動(dòng)機(jī)，再模仿直流電動(dòng)機(jī)的控制方法進(jìn)行控制。忽略磁化曲線的飽和非線性因素。沿勵(lì)磁磁極的軸線為d軸，與d軸正交的是q軸，dq坐標(biāo)在空間也以同步轉(zhuǎn)速旋轉(zhuǎn)，d軸與A軸之間的夾角為變量θ。如果把三相電流空間矢量ib或磁動(dòng)勢(shì)矢量Fs和電流時(shí)間相量is重疊在一起，可以把空間矢量圖和時(shí)間矢量圖合而為一，稱作時(shí)空矢量圖，這時(shí)磁通ΦR便與磁鏈ψR(shí)s重合。只要保證氣隙磁通恒定，控制定子電流的轉(zhuǎn)矩分量ist就可以方便靈活地控制同步電動(dòng)機(jī)的電磁轉(zhuǎn)矩。將、和來(lái)自位置傳感器BQ的旋轉(zhuǎn)坐標(biāo)相位角θ一起送入矢量運(yùn)算器，并由其計(jì)算出定子三相電流的給定信號(hào)、和勵(lì)磁電流給定信號(hào)。它為工種設(shè)計(jì)人員提供了強(qiáng)有力的兩維和三維設(shè)計(jì)與繪圖功能。具有強(qiáng)大的圖形繪制功能：Auto CAD提供了創(chuàng)建直線、圓、圓弧、曲線、文本和尺寸標(biāo)注等多種圖形對(duì)象的功能。三維造型功能：Auto CAD具備三維模型、布爾運(yùn)算、三維編輯等功能。此外，Auto CAD支持Object ARX、ActiveX、VBA等技術(shù)，提供了其他高級(jí)編輯語(yǔ)言的接口，具有很強(qiáng)的開(kāi)發(fā)性。在此次同步電動(dòng)機(jī)設(shè)計(jì)過(guò)程中，導(dǎo)師給我們提供了轉(zhuǎn)子沖片圖的樣板，根據(jù)計(jì)算出的數(shù)據(jù)就可以用AUTOCAD畫(huà)出圖形。并對(duì)電磁設(shè)計(jì)進(jìn)行了優(yōu)化設(shè)計(jì)，利用計(jì)算機(jī)程序?qū)﹄姍C(jī)設(shè)計(jì)進(jìn)行優(yōu)化設(shè)計(jì)的調(diào)試，分別為：；。做畢業(yè)設(shè)計(jì)的過(guò)程，是一個(gè)知識(shí)的應(yīng)用的過(guò)程，同時(shí)也是檢驗(yàn)自己的過(guò)程。畢業(yè)設(shè)計(jì)是學(xué)生即將完成學(xué)業(yè)的最后一個(gè)重要環(huán)節(jié)，在學(xué)生從校園走向社會(huì)起到很好的承前啟后的作用，所以要培養(yǎng)嚴(yán)肅認(rèn)真的科學(xué)態(tài)度和求實(shí)的工作作風(fēng)，形成正確的世界觀，掌握科學(xué)的方法論，培養(yǎng)綜合運(yùn)用所學(xué)基礎(chǔ)理論、專門知識(shí)、基本技能，發(fā)現(xiàn)、分析、解決與本專業(yè)相關(guān)的實(shí)際問(wèn)題，以及從事科學(xué)研究工作或擔(dān)負(fù)專門技術(shù)工作的基本能力。NANCHANG UNIVERSITY外文資料原文及譯文（2006—2010年） 學(xué) 院： 信息工程學(xué)院 系 電氣與自動(dòng)化工程系 專 業(yè)： 電氣工程及其自動(dòng)化 班 級(jí)： 電機(jī)電器062班 學(xué) 號(hào)： 6101106076 姓 名： 閆 永 佳 指導(dǎo)教師： 黃 劭 剛 起訖日期： ~ Deadtime Compensation of SVPWM Based on DSP TMS320F2812 for PMSMSong Xuelei*, Wen Xuhui, Guo Xinhua, and Zhao FengInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing, Email: songxlAbstract—The deadtime effect in a threephase voltage source inverter can result in voltage losses, current waveform distortion and torque pulsation. In order to improve the current waveform and decrease the torque pulsation, this paper proposes a deadtime pensation method of SVPWM. This method divides the iα iβ plane into six sectors and pensates the deadtime of SVPWM according to the sector number of stator current vector determined by the α and βaxis ponents of the stator current vector in the twophase static reference frame. In addition, this method can be implemented entirely through software without any extra hardware. Finally experiments based on DSP TMS320F2812 are established and made, and the experiment results indicate that the proposed method is correct and feasible.Index Termsdeadtime pensation,SVPWM,PMSM,TMS320F2812I. INTRODUCTIONBecause the permanent magnet synchronous machine (PMSM) has a lot of advantages such as high power density, high efficiency, high torque to inertia ratio, high reliability, et al[1],therefore, the PMSM driving system have been widely used in many application fields, especially in hybrid electric vehicles (HEV) in recentyears[2][6]. In the PMSM driving system, the threephase voltage source inverter is usually adopted and the IGBT and MOSFET are also used because of their fast switchingfrequency. For the threephase voltage source inverter, in order to avoid the short circuit of the dc link occurring when the two switch devices of the same phase are turned on simultaneously, the deadtime is usually inserted in the gate driving switch signals. During the duration of the deadtime, both of the two switch device of the same phase are turned off. The existing of the deadtime will lead to a series of deadtime effect problems such as voltage losses, current waveform distortion and torque pulsation, especially under the condition of small current or low speed.SVPWM (Space Vector Pulse Width Modulation) is a popular modulation method for threephase voltage source inverter in motor driving system. In order to improve the current waveform of motors and decrease the torque pulsation of motors, several deadtime pensation methods of SVPWM have been researched and used in the motor driving system[7][11]. Most of the pensation methods are based on the theory of average voltage deviation. In this paper, a novel deadtime pensation method of SVPWM, which is also based on the theory of average voltage deviation, is proposed. This method divides the iα iβ plane into six sectors and pensates the deadtime of SVPWM according to the stator current vector angle φ determined by the α and β axis ponents of the stator current vector in the α β reference frame. In addition, this method can be implemented entirely through software without any extra hardware design. Finally experiments are made on the PMSM driving platform based on DSP TMS320F2812 to test and verify the proposed pensation method.II. DEADTIME COMPENSATION METHOD shows the topology diagram of the PMSM driving system whose invert unit adopts the threephase voltage source inverter. In , Q1, Q2, Q3, Q4, Q5 and Q6 are six IGBTs of the threephase voltage source inverter, and D1, D2, D3, D4, D5 and D6 are their reverse parallel diodes respectively. In addition, the driving switch signals g1, g2, g3, g4, g5 and g6 are provided by the control unit of the driving system.Define the phase currents ia, ib and ic are positive when they flow from the inverter to PMSM, and negative when they flow from PMSM to the inverter. There are eight switch bination states for the six IGBTs in the threephase voltage source inverter, and during the duration of deadtime, there are correspondingly six current bination states for threephase currents ia, ib and ic according to their polarity:(1) ia0, ib0 and ic0。(5) ia0, ib0 and ic0。(3) ia0, ib0 and ic0。其間每一過(guò)程都得到指導(dǎo)導(dǎo)師黃劭剛教授的悉心指導(dǎo)，黃老師每周安排兩次見(jiàn)面會(huì)，身體力行、兢兢業(yè)業(yè)地為我們排憂解難，不僅治學(xué)嚴(yán)謹(jǐn)而且為人師表，堪稱良師益友，教給我們的不僅是知識(shí)還有待人處世的積極態(tài)度，在此表示衷心的感謝。使我對(duì)科學(xué)研究的過(guò)程和方法，有了一個(gè)深刻的體會(huì)和了解。同時(shí)對(duì)所學(xué)知識(shí)進(jìn)行了梳理與總結(jié)，并培養(yǎng)和提高了自己獨(dú)立分析、解決問(wèn)題的能力。圖73單相繞組聯(lián)結(jié)圖圖74 三相繞組聯(lián)結(jié)圖參考文獻(xiàn)[1]. 陳世坤 電機(jī)設(shè)計(jì)[M] 北京：機(jī)械工業(yè)出版社 2000[2]. 李發(fā)海 朱東起 電機(jī)學(xué)[M] 北京：科學(xué)出版社 2001[3]. 韓俊良 風(fēng)力發(fā)電設(shè)備的技術(shù)特