英文的电气工程论文题目

Welding Automation Research in the engineering school is largely focused on problems involving sensing, modeling, and control of welding processes, ., welding automation. Faculty and students from electrical engineering, mechanical engineering, and material science are involved in the welding automation research. The overall objective of this research is to provide both greater productivity and enhanced quality for welding in the manufacturing

电气工程：1Electrical Engineering My decision to pursue graduate study in the United States is underscored by my desire to be a part of the graduate program at your institution. Purdue University offers the flexibility needed for such a vast and rapidly changing field. The research facilities and the faculty at the university are par excellent. Communications is an industry that has changed our lives. In a very short period it has changed the way we have looked at things since centuries. It is one industry that is going to shape our future for centuries to come. Hence my desire to do masters in electrical engineering with communications as my major. My interest in electronics blossomed during my high school years. It was the time when technology had begun to make an impact on the lives of people in India. Hence engineering with electronics as my major was the first choice for my undergraduate studies. Right since the beginning of my undergraduate study electronics is a subject that has fascinated me with its power of applications. The subjects that I have studied include Linear Electronics, Digital Electronics. These laid the foundation for my courses in Electronic Communication & Communication Systems at a later stage. My undergraduate studies already focus on the communications aspect of electronics. A masters degree in electrical engineering with communications as major field is the next logical step. For the past four months I have been working as a project trainee at the Indian Institute for Advanced Electronics. I am working on the design and development of a "PC Controlled Digital Serial Data Generator". This short stint has given me invaluable practical experience. It has given me the confidence to pursue a masters degree and also kindled a desire to do research. During the course of my work at IIAE, I have come across several scientists. Most of them work in different areas of communications. Interactions with them have made me realize the vastness and the scope of communications. My discussions with them convinced me that specializing in communications will suit me very well. The subject of research which interests me very much is spread spectrum communication systems. Coding theory and combinations is another research subject which arouses my curiosity. The subject Communication Theory which I am studying at present introduces these topics in theory. I am eager to find out more about the applications of coding theory to spread spectrum communication systems. In addition I have been a student member of the IEEE (Institute of Electrical and Electronics Engineers, Inc.) for the past three years. Through its workshops/seminars and publications like the 'The Spectrum' it has exposed me to a lot of emerging technologies in the field of communications. It is a strong belief in my family that the American education system has the best to offer in the whole world. This belief arises out of the experience that my parents had when they did their Masters of Science in the University of Pennsylvania during the years 1967-69. If I can get an opportunity to be a part of that intellectually stimulating environment, I am sure my talents will be put to optimal use. India is a developing country with an enormous potential in the information technology business. To serve the needs of this developing industry and more important its vast population, communications is going to become of utmost importance. Thus conditions here are very conducive to supplement my aspirations when I return after completing my graduate studies. 2Electrical Engineering As a graduate student, I will undertake research and coursework in Electrical Engineering to enhance my competencies in this field. I intend to complete my master's degree in order to pursue my doctorate. The research that I am most interested in pursuing at Northeastern University surrounds the optical properties of MEMS devices, and the development of substrate-based fast electro-optical interfaces. My interest in this area stems from my undergraduate study in MEMs development for tri-axial accelerometers. Engineering has been a key interest of mine since childhood. While still in grade school I enjoyed listening to my father, an electrical engineer, teach me about advances in technology, and was always eager to hear more. I was introduced to my first computer at the age of five, and have loved interacting with them ever since. My decision to study engineering as a career was no surprise to those who knew me. In college I found that I was always studying something I enjoyed. I believe it is because I enjoy my life and my work that I have been successful. Spending hours in the laboratory is not something that I dread, but instead I take pride in my work and its successful completion. One example of this that is still fresh in my mind is the successful design of a fully functional microprocessor in the Xilinx environment. All told, the project took over 150 hours of each design-team member's time. However, I did not look on it as a drain, but an experience for learning and a focus for my professional and technical development. When we finished the project we felt the sense of worth and pride in completion of a task that was once above our level of knowledge. Pursuing a graduate degree in the research field I have chosen also feels like a challenge, and I know that study will frustrate me at times. However, I feel that my commitment to learning will not be swayed. I feel confident in my ability to be creative in my perspective, and to persevere. My ultimate goal is to be an innovator in the field I have chosen to study. Professionalism and creativity are my most valued strengths. At the heart of my interest is the advancement of man in concert with his environment. My personal philosophy of life will matter greatly during my study and after its completion. That is why I devote time to reflection on my goals and their implications. Money has never been a motivator for my work, nor do I think it will be in the future. However, as a professional and a graduate, I realize that my earning potential will be significant. That is why I also commit myself to charity and fairness. In the past I have been a member of the Boy Scouts of America, and have achieved the rank of Eagle Scout. In the course of my experience in that organization, I learned respect and moral value. Now, as a member of the IEEE, I value my professional standing and its commensurate moral implications. Ethics in engineering is as important as technical skill, and as such I intend to uphold my own ethical obligations to the best of my ability. As a Northeastern University student, I would commit all that I have to offer to my study. I intend to pursue research in MEMS technology. At Rowan University as an undergraduate student I have already conducted some research and development of MEMS sensors for military applications, resulting in publication. An article, written by myself and my project member David Bowen and edited by our advisor Dr. Robert Krchnavek, was published in the NAVSEA Intelligent Ships Symposium Proceedings of 2001. The paper was titled "Designing a 3-Axis, Monolithic, MEMS-Based Accelerometer" and was under review for endorsement by the US Navy's NAVSEA facility in Philadelphia during that year. Building on my past success in MEMs design, I hope to advance my understanding. Through research at the graduate level, it is my hope to become familiar with, and innovate the design of MEMs Optics in hopes of creating a reliable and practical MEMs Electro-Optical Interface for use in consumer electronics. It is my hope, that through my research, optical waveguides for intradevice communication might be realized. Finally, my intent to pursue graduate study is laid plain. Study of MEMs optics is my intended focus, and I am committed to my goal. In pursuing a doctoral degree, I have closely analyzed myself to determine the reasons for my previous successes and my goals for the future. I have found that I do and have always enjoyed engineering, and that I have a strong desire to pursue my study further. I am prepared to commit myself to that study, and achieve what I have set out to do. 3I Wish to Pursue an MS Degree in Electrical Engineering During my senior year at Purdue University, I made a decision that has impacted the entire course of my education. While my classmates were making definite decisions about their career paths, I chose to implement a five-year plan of development and growth for myself. I designed this plan in order to examine various careers that I thought might interest me, as well as to expand upon my abilities at the time. As I was attaining a BS degree in Electrical Engineering, I decided to focus primarily on fields related to the VLSI (Very Large-Scale Integrated) circuits area. My main goals were either to gain work experience or to further my education by pursuing an MS degree in Electrical Engineering (MSEE). I saw an opportunity to both work and learn through employment at Xilinx Inc. Operating as a product engineer at a successful, high-tech semiconductor company has enabled me to utilize my technical and interpersonal skills in new and challenging ways. The position has also allowed me to interact with a multitude of departments including marketing, integrated circuit (IC) design, software/CAD development, manufacturing, reliability, accounting, and sales. I thus have gained an array of experience that extended beyond the parameters of my own responsibilities. In the workplace, I rely heavily upon the interpersonal techniques I developed as a counselor in a Purdue residence hall, as well as the organizational skills I had acquired through holding various leadership positions in cultural and engineering societies. I have also cultivated an interest in high-technology marketing that has continued to grow throughout my career. My experiences with Xilinx have heightened my hunger for knowledge in the VLSI field. Two months after joining the corporation, I applied to several part-time programs in the vicinity that would allow me to acquire an MSEE degree within two to three years. San Jose State seemed an ideal choice, for its evening MSEE courses would allow me to pursue two independent, full-time positions concurrently. The San Jose program has complimented my Xilinx duties well; both demand large levels of energy and enthusiasm while guiding me to my ultimate goal a high degree of education in VLSI sciences. The resources that I poured into both endeavors have reaped many gains. I have been promoted to a Product-Yield Engineering position within Xilinx's Coarse Grain Static Memory (CGSM) Product Engineering division. My extensive coursework plays a key role in my continued success at Xilinx. Relevant classes in advanced digital and analog VLSI design, as well as sub-micron ULSI technology, have allowed me to understand more completely the workings of Xilinx, a fab-less semiconductor company that also functions as a software and hardware design, testing, and marketing center. The gains in knowledge I have made through the combination of work experience and education have indeed been exponential. The academic records of my senior year at Purdue, coupled with my MSEE coursework, are ample proof of my dedication to learning. I feel I have overcome through hard work and dedication the brief "dry phase" I underwent at Purdue during the close of my sophomore and the first semester of my junior years. My performance at that time is in no way indicative of my usual achievements; they are instead the result of urgent family difficulties that required much foreign travel and serious attention to resolve. In May, I shall graduate with an MSEE degree from San Jose well ahead of my original estimates. This early graduation with Dean's Honors is the result of my firm belief in the value of diligence, as well as my renewed determination to strive for perfection in both work and school. I am now embarking on another five-year plan, during which I hope to fulfill several specific career goals. For instance, being part of a very dynamic and results-oriented Yield team at Xilinx calls for continuous development of computational and statistical techniques. The Yield team is divided to focus on specific process/fabrication issues and process (manufacturing) optimization. My own position is an integral part of the optimization group. Speed and cost issues continue to press high technology atmospheres towards optimization, probability and stochastic processes and systems, and rigorous simulations of mathematical models. The MS in EES&OR offered at your university will grant me the statistical knowledge that is crucial for process and production optimization in a fab-less environment. In addition, product engineering requires fundamental research on mathematical models for linear and non-linear programming, as well as the utilization of efficient computer software. I continuously employ the knowledge I gained at Purdue in Operations Research and advanced mathematics courses. Yet despite the value of these classes and my high performance in them, I now require further education to best fulfill my duties. An MS in the EES&OR field, will give me knowledge that is invaluable to a career in product development, project management and strategic planning. The program will allow me to improve decision-making skills in operations, strategy, and policy issues. I will strengthen my theory and application in countless areas:continuous, discrete, numerical optimization; probabilistic and stochastic processes; dynamic systems and simulation; economics, finance, and investment; decision analysis; dynamic programming and planning under uncertainty; operations and service; corporate and individual strategy; and private and public policy , the EES&OR program will not only help me to excel at Xilinx but will also further any future career. My commitment to work and education over the last three years proves that I will pursue this MS with enthusiasm and technical edge that the MS would provide is I will be working while attending Stanford, I shall mingle education with practical application, and bring to the table interesting problems from my experience and past education. Technical challenges encountered through projects in the EES&OR program will provide motivation and opportunity for methodological data collection, processing and presentation issues presented are integral to my future goals, and the management challenges raised will provide invaluable experience for professional practice. This will in turn build a solid foundation for a life-long career that can overcome any problem in decision-making. In addition, taking courses in economics, finance, and investment analysis will allow much growth of knowledge in investment issues in different industries. The EES&OR program thus appeals not only to my engineering, economics, science and mathematical background, but will compliment my technical abilities with the conceptual frameworks needed to analyze problems in operations, production, strategic planning, and marketing in the realm of emiconductor/IC/engineering systems. I feel that I am prepared to meet the challenges of the curriculum. My coursework in intermediate microeconomics and macroeconomics, international trade, operations research, linear algebra, and probabilistic methods, along with my extensive calculus background, will allow me to function well within the program. My long-term career goals include a move into marketing and product management. I believe that attaining this MS degree is the cornerstone to achieving my goals. It will give me the academic background necessary to succeed in product development, project management, and strategic planning. It will improve decision-making skills necessary for optimizing performance. The integration of two excellent programs in Economics Systems and Operations Research thus suits my current position and ties in with future goals perfectly by improving decision making in operations, strategy and policy. At present I desire to continue at Xilinx; attending a program that provides the flexibility and convenience of the SITN, is therefore imperative. Hence, being at Stanford as an HCP student alsoattracts me. I believe that Stanford is the best environment for me to achieve my goals while gaining exposure to and experience with a diverse student body and faculty. It is my belief that one continues to learn throughout one's life, and the most effective method of learning is through interaction with 's diversity offers an environment for learning, both inside and outside the classroom. I hope to share my varied knowledge with my classmates and to take from them a new understanding of topics that are foreign to me. I believe that no other school provides students with the combination of education and environment offered by Stanford. Its outstanding academic reputation, mingled with its diverse environment and thriving Bay Area location, creates an opportunity for growth that is second to none. I have many ambitions for myself as I embark on this stage of my life. I believe that an education from Stanford will provide invaluable experiences and skills that will allow me to become a successful and innovative business leader in the new millennium. 4Research Department of Biomedical Engineering is designed to research on and solve the bio-electrical and biomagnetic engineering problems in the field of biology and medicine with the aid of engineering principles and methods. Its main task is to explain, from perspective view of engineering, the biological and pathologic processes of the living organisms, especially human beings, and research on and develop the related medical devices and life science devices. Its research directions mainly include the modeling and emulation of the biological system, testing and analysis of biomedical signals, the biomedical imaging and processing , the biological effects of electromagnetic field and the development of artificial organs and medical devices, Bioengineering With the development and integration of electromagnetism, biology and medicine, biological electromagnetism exercises more and more influence on human life and health, environment protection and biological engineering. The research on electromagnetic bioengineering is a new research direction for IEECAS, mainly including research on rules of mutual influence between electromagnetic field and life matter, biological electromagnetic effect and its application in biology, medicine and medical equipment. At present, the research team has set up labs such as biological electromagnetic environment lab, biological electromagnetic signals & electromagnetic property testing lab, electromagnetic biological effect testing lab and biological electromagnetic simulation lab. It is equipped with various electrical and magnetic fields for experiments of biological electromagnetic effects, simulation software and biochemical experiment equipment. With such equipments, it can do biological electromagnetic experiments on live animals and detached live cells, detect, analyze and process the very weak biological electromagnetic signals, analyze and test live organism or detached cell under electromagnetic interaction with biochemical quantitative methods. The recent research work focuses on the effects 方向对不对，不知你要哪种，告诉我，我再接着找多的话email you

用于分布式在线UPS中的并联逆变器的一种无线控制器A Wireless Controller for Parallel Inverters in Distributed Online UPS SystemsJosep M. Guerrero', Luis Garcia de Vicufia", Jose Matas'*, Jaume Miret", and Miguel Castilla". Departament #Enginyeria de Sistemes, Automatica i Informhtica Industrial. Universitat Polithica de CatalunyaC. Comte d'Urgell, -Barcelona. Spain. Email: .. Departament #Enginyeria Electrbnica. Universitat Polit6cnica de CatalunyaAV. Victor BaLguer s/n. 08800I - Vilanova i la Geltrh. SpainAbsiract - In this paper, a novel controller for parallelconnectedonline-UPS inverters without control wireinterconnections is presented. The wireless control technique isbased on the well-known droop method, which consists inintroducing P-oand Q-V schemes into the inverters, in order toshare properly the power drawn to the loads. The droop methodhas been widely used in applications of load sharing betweendifferent parallel-connected inverters. However, this methodhas several drawbacks that limited its application, such as atrade-off between output-voltage regulation and power sharingaccuracy, slow transient response, and frequency and phasedeviation. This last disadvantage makes impracticable themethod in online-UPS systems, since in this case every modulemust be in phase with the utility ac mains. To overcome theselimitations, we propose a novel control scheme, endowing to theparalleled-UPS system a proper transient response, strictlyfrequency and phase synchronization with the ac mains, andexcellent power sharing. Simulation and experimental resultsare reported confirming the validity of the proposed . INTRODUCTIONThe parallel operation of distributed Uninterruptible PowerSupplies (UPS) is presented as a suitable solution to supplycritical and sensitive loads, when high reliability and poweravailability are required. In the last years, many controlschemes for parallel-connected inverters has been raised,which are derived from parallel-schemes of dc-dc converters[I], such as the master-slave control [2], or the democraticcontrol [3]. In contrast, novel control schemes have beenappeared recently, such as the chain-structure control [4], orthe distributed control [ 5 ] . However, all these schemes needcontrol interconnections between modules and, hence, thereliability of the system is reduced since they can be a sourceof noise and failures. Moreover, these communication wireslimited the physical situation ofthe modules [6].In this sense, several control techniques has been proposedwithout control interconnections, such as the droop this method, the control loop achieves good power sharingmaking tight adjustments over the output voltage frequencyand amplitude of the inverter, with the objective tocompensate the active and reactive power unbalances [7].This concept is derived from the power system theory, inwhich the frequency of a generator drops when the powerdrawn to the utility line increases [8].0-7803-7906-3/03/$ 02003 IEEE. 1637However, this control approach has an inherent trade-offbetween voltage regulation and power sharing. In addition,this method exhibits slow dynamic-response, since it requireslow-pass filters to calculate the average value of the activeand reactive power. Hence, the stability and the dynamics ofthe whole system are hardly influenced by the characteristicsof these filters and by the value of the droop coefficients,which are bounded by the maximum allowed deviations ofthe output voltage amplitude and , when active power increases, the droopcharacteristic causes a frequency deviation from the nominalvalue and, consequently, it results in a variable phasedifference between the mains and the inverter output fact can be a problem when the bypass switch mustconnect the utility line directly to the critical bus in stead ofits phase difference. In [9], two possibilities are presented inorder to achieve phase synchronization for parallel lineinteractiveUPS systems. The first one is to locate a particularmodule near the bypass switch, which must to synchronizethe output voltage to the mains while supporting overloadcondition before switch on. The second possibility is to waitfor the instant when phase matching is produced to connectthe , the mentioned two folds cannot be applied to aparallel online-UPS system, since maximum transfer timeought to be less than a % of line period, and all the modulesmust be always synchronized with the mains when it ispresent. Hence, the modules should be prepared to transferdirectly the energy from the mains to the critical bus in caseof overload or failure [lo].In our previous works [11][12], we proposed differentcontrol schemes to overcome several limitations of theconventional droop method. However, these controllers bythemselves are inappropriate to apply to a parallel online-UPS system. In this paper, a novel wireless control scheme isproposed to parallel different online UPS modules with highperformance and restricted requirements. The controllerprovides: 1) proper transient response; 2) power sharingaccuracy; 3) stable frequency operation; and 4) good phasematching between the output-voltage and the utility , this new approach is especially suitable for paralleled-UPS systems with true redundancy, high reliability andpower availability. Simulation and experimental results arereported, confirming the validity of this control . 1. Equivalenl cimuif ofan invener connecled 10 a bust"Fig. 2. P-odraop . REVlEW OF THE CONVENTIONAL DROOP METHODFig. 1 shows the equivalent circuit of an inverter connectedto a common bus through coupled impedance. When thisimpedance is inductive, the active and reactive powers drawnto the load can be expressed asEVcosQ - V2 Q=where Xis the output reactance of an inverter; Q is the phaseangle between the output voltage of the inverter and thevoltage of the common bus; E and V are the amplitude of theoutput voltage of the inverter and the bus voltage, the above equations it can be derived that the activepower P is predominately dependent on the power angle Q,while the reactive power Q mostly depends on the outputvoltageamplitude. Consequently, most of wireless-control ofparalleled-inverters uses the conventional droop method,which introduces the following droops in the amplitude Eand the frequency U of the inverter output voltageu = w -mP (3)E = E ' - n Q , (4)being W* and E' the output voltage frequency and amplitudeat no load, respectively; m and n are the droop coefficientsfor the frequency and amplitude, , a coupled inductance is needed between theinverter output and the critical bus that fixes the outputimpedance, in order to ensure a proper power flow. However,it is bulky and increase:; the size and the cost of the UPSmodules. In addition, tho output voltage is highly distortedwhen supplying nonlinezr loads since the output impedanceis a pure is well known that if droop coefficients are increased,then good power sharing is achieved at the expense ofdegrading the voltage regulation (see Fig. 2).The inherent trade-off of this scheme restricts thementioned coefficients, which can be a serious limitation interms of transient response, power sharing accuracy, andsystem the other hand, lo carry out the droop functions,expressed by (3) and (4), it is necessary to calculate theaverage value over one line-cycle of the output active andreactive instantaneous power. This can be implemented bymeans of low pass filters with a smaller bandwidth than thatof the closed-loop inverter. Consequently, the powercalculation filters and droop coefficients determine, to a largeextent, the dynamics and the stability of the paralleledinvertersystem [ conclusion, the droop method has several intrinsicproblems to be applied a wireless paralleled-system ofonline UPS, which can he summed-up as follows:Static trade-off between the output-voltage regulation(frequency and amplitude) and the power-sharingaccuracy (active an4d reactive).2) Limited transient response. The system dynamicsdepends on the power-calculation filter characteristics,the droop coefficients, and the output of ac mains synchronization. The frequency andphase deviations, due to the frequency droop, makeimpracticable this method to a parallel-connectedonline UPS system, in which every UPS should becontinuously synchronized to the public ac )3)111. PROPOSED CONTROL FOR PARALLEL ONLINE UPSINVERTERSIn this work, we will try to overcome the above limitationsand to synthesize a novel control strategy withoutcommunication wires that could be appropriate to highperformanceparalleled industrial UPS. The objective is toconnect online UPS inverters in parallel without usingcontrol interconnections. This kind of systems, also namedinverter-preferred, should be continuously synchronized tothe utility line. When an overload or an inverter failureoccurs, a static bypass switch may connect the input line tothe load, bypassing the inve:rter [14][15].Fig. 3 shows the general diagram of a distributed onlineUPS system. This system consists of two buses: the utilitybus, which is connected lo the public ac mains; and thesecure bus, connected to the distributed critical loads. Theinterface between these buses is based on a number of onlineUPS modules connected in parallel, which providescontinuously power to the: loads [16]. The UPS modulesinclude a rectifier, a set of batteries, an inverter, and a staticbypass ac mainsutility busI I Ij distributed loads !Fig. 3. Online distributed UPS /I 4(4Fig. 4. Operation modes of an online UPS.(a) Normal operation. (b) Bypass operation. (c) Mains failureThe main operation modes of a distributed online UPS1) Normal operation: The power flows to the load, fromthe utility through the distributed UPS ) Mains failure: When the public ac mains fails, theUPS inverters supply the power to the loads, from thebatteries, without operation: When an overload situation occurs,the bypass switch must connect the critical busdirectly to the ac mains, in order to guarantee thecontinuous supply of the loads, avoiding the damageof the UPS this reason, the output-voltage waveform should besynchronized to the mains, when this last is are listed below (see Fig. 5):3)Nevertheless, as we state before, the conventional droopmethod can not satisfy the need for synchronization with theutility, due to the frequency variation of the inverters, whichprovokes a phase obtain the required performance, we present a transientP-w droop without frequency-deviation in steady-state,proposed previously by OUT in [ 111w=o -mP (5)where is the active power signal without the dccomponent,which is done by. -I t -1sP= p ,( s + t - ' ) ( s + o , )being zthe time constant of the transient droop transient droop function ensures a stable frequencyregulation under steady-state conditions, and 'at the sametime, achieves active power balance by adjusting thefrequency of the modules during a load transient. Besides, toadjust the phase of the modules we propose an additionalsynchronizing loop, yieldingo=w'-m%k,A$, (7)where A$ is the phase difference between the inverter and themains; and k, is the proportional constant of the frequencyadjust. The steady-state frequency reference w* can beobtained by measuring the utility line second term of the previous equality trends to zero insteady state, leading tow = w' - k4($ -@'), (8)being $and $* the phase angles of the output voltage inverterand the utility mains, into account that w = d $ / d t , we can obtain thenext differential equation, which is stable fork, positived$ *dt dt- + km$ = - + k,$' . (9)Thus, when phase difference increases, frequency willdecrease slightly and, hence, all :he UPS modules will besynchronized with the utility, while sharing the power drawnto the . CONTROLLIEMRP LEMENTATIONFig. 5 depicts the block diagram of the proposedcontroller. The average active power P , without the dccomponent, can be obtained by means of multiplying theoutput voltage by the output current, and filtering the product........................................................................................io",.LSj'nchronirorion loop.......................................................................................Fig. 5. Block diagram of the proposed a band-pass filter. In a similar way, the averagereactive power is obtained, hut in this case the output-voltagemust be delayed 90 degrees, and using a low-pass order to adjust the output voltage frequency, equation(7) is implemented, which corresponds to the frequencymains drooped by two transient-terms: the transient activepower signal term; and the phase difference term, whichis added in order to synchronize the output voltage with theac mains, in a phase-locked loop (PLL) fashion. The outputvoltageamplitude is regulated by using the conventionaldroop method (4).Finally, the physical coupled inductance can be avoided byusing a virtual inductor [17]. This concept consists inemulated an inductance behavior, by drooping the outputvoltage proportionally to the time derivative of the outputcurrent. However, when supplying nonlinear loads, the highordercurrent-harmonics can increase too much the outputvoltageTHD. This can be easily solved by using a high-passfilter instead of a pure-derivative term of the output current,which is useful to share linear and nonlinear loads [I 1][12].Furthermore, the proper design of this output inductance canreduce, to a large extent, the unbalance line-impedanceimpact over the power sharing . SIMULATION AND EXPERIMENTARELS ULTSThe proposed control scheme, (4) and (7), was simulatedwith the parameters listed in Table 1 and the scheme shownin Fig. 6, for a two paralleled inverters system. Thecoefficients m, n, T, and kv were chosen to ensure stability,proper transient response and good phase matching. Fig. 7shows the waveforms of the frequency, circulating currents,phase difference between the modules and the utility line,and the evolution of the active and reactive powers. Note theexcellent synchronization between the modules and theACmiiinr 4 j. ...L...... ..........................B...u...n...... ................................... iFig. 6. Parallel operation oftwa online UPS modules,mains, and, at the same time, the good power sharingobtained. This characteristik let us to apply the controller tothe online UPS paralleled I-kVA UPS modules were built and tested in order toshow the validity of the proposed approach. Each UPSinverter consisted of a single-phase IGBT full-bridge with aswitching frequency of 20 kHz and an LC output filter, withthe following parameters: 1. = 1 mH, C = 20 WF, Vi" = 400V,v, = 220 V, I50 Hz. The controllers of these inverters werebased on three loops: an inner current-loop, an outer PIcontroller that ensures voltage regulation, and the loadsharingcontroller, based on (4) and (7). The last controllerwas implemented by means of a TMS320LF2407A, fixedpoint40 MHz digital sigrial processor (DSP) from TexasInstruments (see Fig. 8), using the parameters listed in TableI. The DSP-controller also includes a PLL block in order tosynchronize the inverter with the common bus. When thisoccurs, the static bypass switch is tumed on, and the droopbasedcontrol is 7 Wa\cfc)rms for , ;mnectcd in parallel. rpchrontred io Ihc ac mdnl.(a) Frequencics ufhoth UPS (b) Clrculattng currcni among modulcs. (CJ Phmc d!Nercn;: betucen ihc UPS a#>dth e ai mum(d) Ikiril uf the phze diNmncc (e) md (0 Activc and rcactlw pouerr "I ooih UPSNote that the iimc-acs arc deliheratcly JiNercni due in thc disiinct timuion*uni) ofthe \ THE PARALLELESDYS Order I IFilter Cut-off Frequency I 0, I 10 I ragsFig. 8 shows the output-current transient response of theUPS inverters. First, the two UPS are operating in parallelwithout load. Notice that a small reactive current is circlingbetween the modules, due to the measurement , a nonlinear load, with a crest factor of 3, is connectedsuddenly. This result shows the good dynamics and loadsharingof the paralleled system when sharing a . 8. Output current for the two paralleled UPS, during the connection of Bcommon nonlinear load with a crest factor of 3. (Axis-x: 20 mddiv. Axis-y:5 Mdiv.).VI. CONCLUSIONSIn this paper, a novel load-sharing controller for parallelconnectedonline UPS systems, was proposed. The controlleris based on the droop method, which avoids the use ofcontrol interconnections. In a sharp contrast with theconventional droop method, the controller presented is ableto keep the output-voltage frequency and phase strictlysynchronized with the utility ac mains, while maintaininggood load sharing for linear and nonlinear loads. This fact letus to extend the droop method to paralleled online the other hand, the proposed controller emulates aspecial kind of impedance, avoiding the use of a physicalcoupled inductance. results reported here show theeffectiveness of the proposed approach.

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电气工程工程师论文题目

以前我们那会就写了个车床控制

电力是发展生产和提高人类生活水平的重要物质基础，电力的应用在不断深化和发展，电气自动化是国民经济和人民生活现代化的重要标志。学术堂整理了十五个电气工程论文题目供大家进行参考：1、短路电流计算曲线的算法研究及与IEC短路电流计算法的对比2、计算曲线法用于大容量机组短路电流计算的评估3、崇明电网配置低压减载装置的必要性和可行性研究4、电压稳定计算中配网模型的研究5、上海电网电压稳定极限运行能力分析6、发电机励磁系统模型对短路电流计算结果的影响7、联络线功率对上海电网电压稳定极限运行的影响8、采用“干预法”估计谐波阻抗9、波过程试验装置的研制10、直流电源中可控硅控制电路的设计11、应用于波过程试验装置的频率可调方波发生器的研制12、水位测量仪的液晶显示器电路的设计13、基于R232、R485的无线数据通信系统的设计14、直流电源中脉冲宽度控制电路的设计15、红外温度测试系统中数据采集电路的设计

随着我国的经济和科技的不断发展，电气技术也渐渐地被人们所关注。下面是由我整理的电气技术论文题目，谢谢你的阅读。电气技术论文题目 1......浅议电气工程的质量控制和安全管理 2......浅议建筑电气工程防雷 3......浅议PLC在机床电气控制系统改造中的应用 4......机电安装工程电气施工关键工序控制与管理 5......浅议电气误操作事故的原因及对策 6......火力发电厂电气控制系统浅探 7......浅述母差保护基本原理 8......建筑电气工程电线管敷设的质量问题及防范 9......浅议高层民用建筑设计中给排水对电气专业提资要求 10.....浅议钳工一体化实习教学 11.....浅议220kV银湖变电站#2主变压器安装施工技术 12.....电气工程施工常见问题及处理 13.....新建黑龙江伊春林都机场防雷改造工程技术方案浅述 14.....浅议提高自备电厂机组利用小时的措施 15.....浅议某垃圾处理厂的电气与自控设计 16.....浅议我国大型水电机组的发展 17.....浅谈电气工程师的作用 18.....浅谈装修工程中电气施工质量控制要点 19.....电气工程及其自动化专业规范研究 20.....浅议变电站设备检修 21.....学习新《安规》的几点初浅体会 22.....电气工程的管理措施研究 23.....浅议汽轮机组的振动故障和处理、保护措施 24.....电气工程与自动化学院介绍(一) 25.....浅议继电保护装置改进后的运行 26.....浅淡10kV配电网建设与改造方案 27.....永磁电机制造关键工艺浅议电气技术论文浅谈电气施工技术摘要：建筑工程的机电安装是施工工程的重要组成部分，并且贯穿于整个建筑工程施工的各个阶段当中。通过介绍电气工程的施工内容，阐述了各个分部公司的施工方法，重点说明了关键工序的主要细节及控制措施。关键词：电气工程;施工技术;质量措施在建筑工程当中，机电安装工程是关键的技术环节，其施工主要包括电气工程、空调和暖通工程、建筑消防工程、弱电工程等具体形式的施工。而这些具体的机电施工，都需要从施工的设备和技术材料的统筹、采购、安装、调试、试运行及竣工后的验收活动等几个步骤进行安排。而每个施工的环节，都会牵扯到技术和质量的有效控制。因此，建筑工程机电施工的整体质量，将直接影响到整个建筑工程的质量，对电气工程的施工技术进行总结，用于指导施工很有意义。 1 施工准备工作在进行建筑工程机电安装施工工程之前，针对此工程施工对象的基本要求和特点，并根据需要，组织与工程有关的相关部门，并按照部门的设置为其选择部门的管理人员，然后根据图纸绘制的设计要求，派技术人员、管理人员进入施工现场进行工作的交接，并根据人员设置和工程的具体情况，进行施工场所的平面布置和平面规划，更有效的管理和监督施工的工作人员严格按照施工计划和施工图纸进行合理施工。 2 电气工程电气工程技术特征建筑工程电气工程施工一般包括高压变电系统、低压配电系统、后备供电系统、照明供电系统、消防控制系统设备、应急的出口指示供电系统、停车场等各个单位的强电供电系统和建筑智能控制、防雷接地等弱电系统。在电气工程施工之前，需要做好一系列的准备工作，比如技术人员和管理人员分配问题、施工设备和施工材料的合理配置、施工图纸、设计和施工资料等方面。对结构造型及预埋管线完成线面标定，按照预先做好的电气专业管线图预留和预埋电气管线，利用专业的技术和工艺进行开线槽、桥架穿越楼板、剪力墙处开孔洞处理以及防雷设备的接地焊接。在土建中进行底板结构施工、电气工程在连接时，一般会采用镀锌的电线管丝扣进行连接，并在各个环节要严格按照建筑安装工艺技术的标准和要求要求进行安装工作。在墙壁的内部暗敷管线，需要从楼板引上或引下，这是需要处理各种墙壁出现的问题。而在对墙壁进行砌体时，首先要保证终端线盒的定位满足图纸的设计要求，并按照相关规定和业主的要求进行相应操作。在完成砌体后，线盒的位置与尺寸将不能改正，所以砌体钱需要充分统筹，而且最好能一次性准确恰当的完成。接着，由于很多工程环节也会有打孔工作，所以需要作好建筑外部明显的标记，避免其他打孔活动会损坏管线。在安装电气的管线后需要进行整齐排列，管理对支架的牢固程度和管卡的均匀程度，注意线管的弯曲半径、电缆管的半径标准，而且要注意保护关口成喇叭形状，注意关口边缘的光滑程度。在电缆穿管之后，要进行密封。 3 电源电路在建筑工程的施工过程当中，对于天花的布置和设计，首先应该充分地考虑到灯具所具有的的照明的效果。除了在设计上要符合使用者需要并注重其外观的美观大方外，在进行其相应的安装环节之前，首先应该合理布置和安排照明的灯具、风口、消防的喷头，并且灯具要坚持在风管的下面进行安装。对于一些具有特殊要求等方面的特殊灯具，需要进行密封处理，才能保证灯具功能的发挥。在线路问题上，一般采用镀锌钢管、防水线盒进行敷设。所有建筑场所的开关、插座、疏散等局的安装都需要符合设计高度并保持一致美观。线路的检测和调试电气工程在线路测试与调试包括：低压配电柜屏、动力设备、照明设备与控制设备的一、二次回路的各项电参数测试，有对地绝缘电阻、线路通断、控制器灵敏度调试及继电保护装置检测调试，各项检验与调试必须严格按设备安规与使用说明进行。 4 空调电气系统鉴于暖通空调系统在机电安装施工中的重要性，除了在技术更新上实现节能降耗外，工程建设业主单位还必须加强多方面的综合管理，全面提升建筑电气工程施工的质量。结合自身的施工经验，现提出优化机电安装施工的综合策略。优化设计。暖通空调系统是一项复杂性的机电结构，在安装之前必须做好多方面的设计评估，对机电设备的结构形式进行优化改进。设计阶段发现任何异常问题时，都必须对安装施工方案加以改进，这样才能为后期施工创造有利条件。暖通空调系统需对于每个器件的设计给予重视。优化功能。施工单位要对建筑物本身质量实施优化处理，不断提高建筑自身的使用性能为机电安装施工带来便利。暖通空调节能效果的实现要借助于建筑内部功能的优化，这是现代暖通空调系统正常运行的保证。建筑功能优化可借助保温技术、节能技术等方面调整，这对于机电安装是很有利的。优化产品。机电安装施工技术调整之后，工程建设业主单位必须严格把关机电设备的质量，对暖通空调设备采取严格的质量审核制度。如此一来，不仅能避免因设备质量问题而影响到机电装置的运行，还能防止暖通空调系统出现各种质量问题，保证了机电安装施工的有序开展。 5 弱电系统弱电系统主要包含综合布线、计算机网络系统、数字有线电视系统、语音程控交换系统、安防系统、背景音乐 / 消防广播系统、多媒体会议系统、前台公共信息发布系统、防雷接地和 UPS 电源系统等建筑智能化系统以及消防自动警报的系统等。随着科技的发展，业主对软垫系统的功能要求越来越细致和先进，所以，在进行配置的功能主机模块的选择当中中，要坚持选择技术成熟且先进的品牌产品为先导，在进行综合布线施工工作中，要注意线管材质，一般来说，选用 KBG类金属管子，并有效地做好接地防护工作，注意强电线管间的规范间距问题，这在很大程度上能有效地防止回路干扰的影响。 6 结语综上所述，电气工程非常重要，需加强技术质量管理，重视施工技术的运用与总结，提高质量把控能力，重视施工工序，确保电气工程的整体质量。参考文献： [1] 叶卫军.建筑工程机电安装施工技术管理浅析[J].科技传播，2011(2). [2] 小军.中小型水电站机电安装工程预埋阶段监理对质量的控制[M].水电站设计，2010(3). [3] 邓怀智，郗艳梅 .设备安装工程与土建工程的施工配合策略浅析[J]河北工程技术高等专科学校学报 [4]庄贤才，蔡蔚，魏晓斌，尧靖秋.浅谈建筑智能化系统工程督导管理[J].智能建筑.2008(4). 作者简介：张利勇()，男，身份证号码4107278，从事施工管理。看了“电气技术论文题目”的人还看： 1. 电气专业论文范文 2. 电气工程前沿技术论文 3. 电气工程方面的论文 4. 电气自动化技术论文范文 5. 电子技术论文题目

你的专业应该学了PLC吧。题目可以拟为《基于PLC的XXXX控制》，例如基于PLC的电梯系统控制。

电气的工程师论文题目

1 电气自动化和电脑的整合运用。2 电气自动化和移动通讯的整合运用3 自动化组装机取代人工生产线的规划运用4 电气自动化的数据收集和统计分析5 电气自动化用于质量管理的规划和运用6 电气自动化运用在精益生产线的规划和分析这些都是目前比较有深度的题目

楼主是什么歇学习阶段呢，你擅长什么呢？

这类的选题有很多，在这里大家可以参考一下往期的论文选题，如：高功率引述整流器的建模与仿真、直流电机闭环控制调速系统的SIMULINK软件仿真、电力系统故障录波器的实验平台开发、抽油机抽空监测及控制器的软件设计、电容器分时投切无功补偿技术在抽油机上的应用研究、油水分离罐的自动运行系统的开发、新型开关电源拓扑的PSPICE的仿真研究、配电网单相接地故障选线的仿真，等等，这类的选题有很多，大家想要了解相关信息不妨来期刊目录网看看。

1、高压软开关充电电源硬件设计2、自动售货机控制系统的设计3、 PLC控制电磁阀耐久试验系统设计4、永磁同步电动机矢量控制系统的仿真研究5、 PLC在热交换控制系统设计中的应用6、颗粒包装机的PLC控制设计7、输油泵站机泵控制系统设计8、基于单片机的万年历硬件设计 9、 550KV GIS中隔离开关操作产生的过电压计算10、时滞网络化控制系统鲁棒控制器设计11、多路压力变送器采集系统设计12、直流电机双闭环系统硬件设计 13、漏磁无损检测磁路优化设计14、光伏逆变电源设计15、胶布烘干温度控制系统的设计16、基于MATLAB的数字滤波器设计与仿真17、电镀生产线中PLC的应用18、万年历的程序设计19、变压器设计20、步进电机运动控制系统的硬件设计21、比例电磁阀驱动性能比较22、 220kv变电站设计 23、 600A测量级电流互感器设计24、自动售货机控制中PLC的应用25、足球机器人比赛决策子系统与运动轨迹的研究26、厂区35kV变电所设计27、基于给定指标的电机设计28、电梯控制中PLC的应用29、常用变压器的结构及性能设计30、六自由度机械臂控制系统软件开发31 输油泵站热媒炉PLC控制系统设计32 步进电机驱动控制系统软件设计33 足球机器人的视觉系统与色标分析的研究34 自来水厂PLC工控系统控制站设计35 永磁直流电动机磁场分析36 永磁同步电动机磁场分析37 应用EWB的电子表电路设计与仿真38 电路与电子技术基础》之模拟电子篇CAI课件的设计39 逻辑无环流直流可逆调速系统的仿真研究40 机器人足球比赛图像采集与目标识别的研究41 自来水厂plc工控系统操作站设计42 PLC结合变频器在风机节能上的应用43 交流电动机调速系统接口电路的设计44 直流电动机可逆调速系统设计45 西门子S7-300PLC在二氧化碳变压吸附中的应用46 DMC控制器设计47 电力电子电路的仿真48 图像处理技术在足球机器人系统中的应用49 管道缺陷长度对漏磁场分布影响的研究 50 生化过程优化控制方案设计51 交流电动机磁场定向控制系统设计52 开关电磁阀流量控制系统的硬件设计53 比例电磁阀的驱动电源设计54 交流电动机SVPWM控制系统设计55 PLC在恒压供水控制中的应用56 西门子S7-200系列PLC在搅拌器控制中的应用57 基于侧抑制增强图像处理方法的研究58 西门子s7-300系列plc在工业加热炉控制中的应用59 西门子s7-200系列plc在电梯控制中的应用60 PLC在恒压供水控制中的应用61 磁悬浮系统的常规控制方法研究62 建筑公司施工进度管理系统设计63 网络销售数据库系统设计64 生产过程设备信息管理系统的设计与实现

电气工程及自动化的英文论文题目

用于分布式在线UPS中的并联逆变器的一种无线控制器已经发送。

不会写论文还这么嚣张?不就是250分吗得到了又怎么地？能吃呀？

我有一篇我本科毕设的小论文，英文中文都有，而且是我人工翻译的，8000字左右。你要的话PM我。我是电气工程及其自动化专业的。《Analysis of thyristor-controlled phase shifter applied in damping power system oscillations》

电气工程类论文题目

论文题目应以最恰当、最简明的词语反映论文中最重要的特定内容的逻辑组合，关于自动化专业的论文题目有哪些?下面我给大家带来自动化专业的论文题目选题参考，希望能帮助到大家!

自动化毕业论文题目

1、配网自动化相关技术的研究

2、数字化变电站自动化技术的应用

3、现场总线与工厂底层自动化及信息集成技术

4、电力自动化技术的新发展

5、冶金自动化发展的策略与思考

6、简述电力系统及其自动化发展趋势研究

7、变电所综合自动化系统应用分析与探讨

8、浅谈数字变电站自动化系统

9、自动化专业人才培养方案和课程体系的改革与实践

10、配电网自动化技术问题初探

11、配电自动化系统中配电终端配置数量规划

12、基于组态软件的综合自动化平台的设计与实现

13、生产线自动化及远程监控

14、地铁自动化控制相关系统的对比及应用

15、配电自动化试点工程技术特点及应用成效分析

16、大型自动化控制系统故障报警技术应用研究

17、变电站综合自动化通信系统运行维护分析

18、浅谈变电站综合自动化系统的结构形式

19、如何提高综合自动化变电站的抗电磁干扰能力

20、动力部一降压变电站综合自动化系统改造及应用

21、智能变电站是变电站综合自动化的发展目标

22、中心城市大型配电自动化设计方案与应用

23、浅析电气自动化控制系统的设计思想

24、建筑电气自动化系统安装的施工技术探讨

25、水电厂电气自动化控制设备的可靠性探讨

26、铝工业电气自动化的现状与发展趋势

27、配网自动化建设对供电可靠性的影响研究

28、浅谈电力自动化管理系统

29、铁路变电站自动化监控系统的研制

30、浅析集控站综合自动化系统运行中存在的问题

31、基于IEC 61850的变电站自动化系统安全风险评估

32、新型智能配电自动化终端自描述功能的实现

33、天津城市核心区配电自动化技术实施与进展

34、配电自动化若干问题的探讨

35、矿井主扇风机自动化与信息化改造

36、馈线自动化自适应快速保护控制方案

37、自动化系统运行中出现的操作失误、服务失败及补救措施

38、应用于拣选操作的自动化立体仓库作业优化调度

39、地质环境自动化远程监测项目社会评估--以山东省为例

40、矿井自动化项目技术管理模式浅论

41、自动化仓储系统优化方法的研究

42、电气自动化工程控制系统的现状及其发展趋势

43、自动化专业卓越工程师课程体系的改革与实践

44、国外配网自动化建设模式对我国配网建设的启示

45、煤矿自动化与信息化技术回顾与展望

46、基于调度策略的自动化仓库系统优化问题研究

47、配网自动化建设抵御呼伦贝尔寒冬

48、藁城新区水厂的自动化建设

49、综合自动化变电站电压量传输新方式

50、以先进自动化技术确保中线调水畅通

电气自动化专业毕业论文题目

1、建筑电气工程自动化设计及实现分析

2、电气自动化在电气工程中的应用

3、建筑中的电气工程及自动化技术探讨

4、成品金电气自动控制称量与熔铸的研发与应用

5、电气自动化工程控制系统的现状及其发展趋势

6、探究加强企业电气控制线路的合理设计

7、电动挖掘机在高原环境下的电气特性及系统设计

8、浅谈电气自动化控制系统的应用及发展

9、电气自动化工程控制系统现状及其发展趋势探讨

10、试论电气工程及其自动化的发展趋势

11、高职电气自动化专业的现状分析及发展

12、智能化技术在电气工程自动化控制中的应用

13、智能化技术在电气工程自动化控制中的应用探究

14、智能化技术在电气工程自动化控制中的应用

15、智能化技术在电气工程自动化控制中的应用

16、浅析煤矿生产中电气自动化技术的应用及发展

17、电气自动化在煤矿生产中的应用

18、单片机在煤矿电气自动化控制技术中的应用研究

19、基于人工智能的电气自动化控制研究

20、工业电气自动化中数字技术的应用与创新

21、多功能舞台电气控制系统的研究与设计

22、 PLC技术在电气设备自动化控制中的应用

23、电气自动化技术在铝电解过程中的应用研究

24、电气自动化控制中的人工智能技术探讨

25、 PLC在选煤厂电气自动化系统中的应用与发展

26、电气火灾监控系统原理及应用研究

27、电气自动化控制中的PLC的有效应用

28、 PLC技术的原理、优点及其在电气设备自动化控制中的实践研究

29、井下电气自动化控制系统优化分析

30、矿井电气自动化系统优化分析研究

31、智能化技术在电气工程自动化控制中的具体应用初探

32、人工智能技术在电气自动化控制中的应用分析

33、电气工程自动化中人工智能的运用

34、面对人才需求的高校电气自动化专业创新能力培养模式研究

35、电气工程及其自动化专业实践教学的探索与思考

电气工程及其自动化论文题目

1、智能化技术电气工程及其自动化的应用探析

2、探讨电气工程及其自动化发展问题分析及应对措施

3、电气工程及其自动化的智能化技术应用分析

4、电气工程及其自动化的质量控制与安全管理

5、PLC技术在电气工程及其自动化控制

6、电气工程的应用及其自动化分析

7、PLC技术在电气工程及其自动化控制中的运用

8、电气工程及其自动化的不足与改善对策分析

9、电气工程及其自动化的质量控制与安全管理

10、浅谈电气工程及其自动化在机械工程中的应用

11、PLC技术在电气工程及其自动化控制中的应用

12、电气工程及其自动化在农村配电网的应用探析

13、电气工程及其自动化技术下的电力系统自动化发展探讨

14、PLC技术在电气工程及其自动化控制中的运用

15、电气工程及其自动化低压电器中继电器的应用

16、电气工程及其自动化存在的问题及应对策略

17、电气工程及其自动化中智能化技术的应用分析

18、继电器在电气工程及其自动化低压电器中的应用研究

19、PLC技术在电气工程及其自动化控制中的应用

20、PLC技术在电气工程及其自动化控制中的应用分析

21、电气工程及其自动化中智能化技术的实际应用

22、电气工程及其自动化的智能化技术应用研究

23、电气工程及其自动化中网络技术的应用分析

24、刍议电气工程及其自动化的智能化技术应用

25、电气工程及其自动化的质量控制与安全管理

26、浅析继电器在电气工程及其自动化低压电器中的应用

27、关于电气工程及其自动化技术在发电厂的应用初探

28、电气工程及其自动化低压电器中继电器的应用

29、继电器在电气工程及其自动化低压电器中的应用研究

30、PLC技术在电气工程及其自动化控制系统中的运用

31、PLC技术在电气工程及其自动化控制中的应用

32、继电器在电气工程及其自动化低压电器中的应用分析

33、试论电气工程及其自动化的智能化技术应用

34、电气工程及其自动化专业实践教学的策略

35、电气工程及其自动化中智能化技术的应用

36、我国电气工程及其自动化的发展现状与前景

37、电气工程及其自动化技术在智能建筑中的应用

38、电气工程及其自动化的智能化技术应用

39、论如何提高电气工程及其自动化

40、电气工程及其自动化的质量控制与安全管理

41、智能建筑中电气工程及其自动化技术探讨

42、PLC技术在电气工程及其自动化控制

43、智能建筑中电气工程及其自动化技术的应用分析

44、PLC技术在电气工程及其自动化控制中的应用分析

45、电气工程及其自动化技术在供热建设中的难点分析

46、智能建筑中的电气工程及其自动化技术分析

47、电气工程及其自动化低压电器中继电器的应用探究

48、PLC技术在电气工程及其自动化控制中的运用分析

49、电气工程及其自动化控制中PLC技术的应用

50、智能建筑中电气工程及其自动化技术分析

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★ 电气自动化专业毕业论文范文

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★ 自动化专业概论论文范文怎么写

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