design of dc machines ppt
Tài liệu Steady State Operation of DC Machines pptx
... already mentioned, DC machines used to be in the past the major source of DC power. In order to produce electric power DC machines were operated as generators.Nowadays, however, use of DC generators ... Electrical Engineering E Levi, 20011STEADY STATE OPERATION OF DC MACHINES 1. INTRODUCTIONElectric DC machines, as indeed any other type of electric machine, can be used toeither produce electric ... more rare. DC power isobtained instead by means of power electronic converters. The remaining applications of DC machines are today restricted to motoring. In this operating regime a DC machine...
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Tài liệu Speed Control of DC Manchines pptx
... Brer vr Br Ir Fr Brvr er Br Ir Fr Đặc tính cơ của động cơ DC kích từ nối tiếp Example 4: Example 5: Đặc tính cơ 4 phần tư...
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Tài liệu Design of a USB Device Driver ppt
... code execution of critical routinesOptimize code execution of critical routines–– Design a solution with parallelism of processing and data Design a solution with parallelism of processing ... depthmultiple packet depth––Hardware Retry of Packet Transfers on errorHardware Retry of Packet Transfers on errorKey Features of a USB ControllerKey Features of a USB Controller18??Hardware ... controls camera via control orbulk endpoints.bulk endpoints.–– Design of the communications protocol is contingent Design of the communications protocol is contingenton the Twain data source...
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Tài liệu The Design of Rolling Bearing Mountings P2 ppt
... end of this publication they aresummarized and explained in a glossary of terms, somesupplemented by illustrations. The Design of Rolling Bearing Mountings Design Examples covering Machines, ... maximum cutting load of 0.9 kN,axial – shaft weight and spring preload of 0.2 kN.Maximum load on the drive end bearing:radial – maximum belt pull of 0.4 kN,axial – spring preload of 0.5 kN.Bearing ... compensated for byinclining of rolls 1 and 3 and by counterbending of rolls 2 and 4. Moreover, the narrow tolerance of thefoil thickness requires a high radial runout accuracy of the bearings and adequate...
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Tài liệu The Design of Rolling Bearing Mountings P1 pptx
... standard-gauge locomotive The Design of Rolling Bearing Mountings Design Examples covering Machines, Vehicles and EquipmentPubl. No. WL 00 200/5 EAFAG OEM und Handel AGA company of the FAG Kugelfischer ... bearings for domestic washing machines are dimensioned for an index of dynamic stressingfL= 0.85 1.0.These values correspond to a nominal life of 300 500 hours of spinning.In the example ... arranged.Bearing selectionThe axial load of 130 kN is made up of the weight of the rotor and the two variable top and bottom fan im-pellers as well as the thrust of these fan impellers. Theyare supported...
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Tài liệu The Design Of Manufacturing Systems P1 pptx
... at the core of the contents of this volume.This set of volumes consists of seven distinctly titled and well-integrated volumes on the broadlysignificant subject of computer-aided design, engineering, ... constraints. 1. Limit on the number of expansions of some processes:(1.13)where NEXP(i) is the maximum allowable number of expansions of process i and IЈ is the set of indices for the process whose ... time periods of the planning horizon ( t ϭ 1, NT ). Variables E it Units of expansion of process i at the beginning of period t . P jlt Units of chemical...
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Tài liệu The Design Of Manufacturing Systems P2 pptx
... minimization of process design from product design, Comput. Aid. Des., 28(5), 321, 1996.Cunningham, J. and Dixon, J., Designing with features: the origin of features, Proceedings of ASMEComputers ... the design stage in order to decrease the number of design iterations. Within the CE context, majorresearch effort is being devoted in the development of seamless integrated engineering design ... Furthermore, the design by featuresapproach assumes that the designer is capable of choosing the best set of features to model a given artifactthat has complex interacting features. The notion of capturing...
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Tài liệu Design of Feedback Control Systems for Stable Plants with Saturating Actuators ppt
... Page 284.3 Simulation of a Model of the F8 AircraftThe purpose of this example is to illustrate the effects of multiple saturations on the directions of the controls and ... problems in the performance of the system are solely due to the effects of the saturationupon the direction of the control vector. Page 3designed. When the signals are ... describedabove, then x(t)e BA,C for all t and for all u(t).Proof: The proof of this Lemma follows from the construction of X(t). //// Page 17r … Logic ' I, -ex(t)I K(s)...
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Tài liệu The Design of Prestressed Concrete Bridges ppt
... Construction of arches 512 12 The nature of design His choice will be informed by other aspects of the project, for instance:the number of similar columns in the project;the range of heights of such ... shape and size of the cut-out. The fi nal judgement on a design must rest with the combined response of public and profession.The choice of a solution that is expressive of the fl ow of forces applies ... thrust of the 55 m span portal subjected to highway loading. However, it is well loved and admired, and is one of only two major bridges designed by Lutyens. 1The nature of design 1.1 Design...
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Báo cáo khoa học: Molecular design of a nylon-6 byproduct-degrading enzyme from a carboxylesterase with a b-lactamase fold ppt
... Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, Japan2 Department of Life Science, Graduate School of Life Science, University of Hyogo, Japan3 ... available:Fig. S1. Stereoview of the catalytic cleft of Hyb-24DN.Fig. S2. Stereoviews of surface structure of Ald-boundand unbound Hyb-24DNY.Fig. S3. Stereoview of the catalytic cleft of Hyb-24DNY and ... coordinates of Hyb-24DN-A112–Ald for protein crystals of Hyb-24D-A112–Ald and of Hyb-24DNY-A112–Ald. Several cycles of manualmodel rebuilding were performed by xfit [24]. Results of thecrystal...
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DESIGN OF ROTATING ELECTRICAL MACHINES pdf
... Synchronous Machines 3957.2.11 Synchronous Reluctance Machines 4007.3 DC Machines 4047.3.1 Configuration of DC Machines 4047.3.2 Operation and Voltage of a DC Machine 4057.3.3 Armature Reaction of ... co-authorship of Professor Tapani Jokinen, whohas spent decades in developing the Finnish machine design profession. An important view of electrical machine design is provided by Professor Val´eria ... In most cases – because of the high permeability of iron parts – the reluctance Rm of the magnetic circuit consists mainly of the reluctances of the air gaps. Thus, most of the energy is stored...
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Báo cáo khoa học: "THE DESIGN OF THE KERNEL ARCHITECTURE FOR THE EUROTRA* SOFTWARE" pptx
... systems to be generated is the one of expert systems because the design of software for an MT system of the scope of gurotra has much in common with the design of a very large expert system. ... communicates. The essence of the task of designing software tools is to transform a computer into a machine which corresponds as closely as possible to the terms of the problem domain of the user for ... knowledge of experts in the problem domain can be communicated to and used by the system as on the programming skill of the software designers and implementers. Typically, the designers of expert...
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Báo cáo khoa học: Template-assisted rational design of peptide inhibitors of furin using the lysine fragment of the mung bean trypsin inhibitor pptx
... ideal template for the design of potent, specific and stable furin inhibitors.Here we report the design and synthesis of variouspeptide analogs derived from the Lys fragment of MBTI and their functional ... of enzyme was added to release 15 nmol of MCAin the 1 min enzyme reaction. For determination of theinhibitory activity, a fixed amount of enzyme was first incu-bated with different amounts of ... inhibitory activity of the Lysdomain was higher than that of the Arg domain, thisstudy focused on the former. The Lys domain con-sists of two peptide chains, which are composed of 26and nine residues,...
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Báo cáo khoa học: "DESIGN OF A MACHINE TRANSLATION SYSTEM " pptx
... style of the sublanguage is distin- guished by cc~plex nominal dependencies with va- rious levels of coordination. In addition, most sentences are inoc~lete in that they consist of a series of ... This software tool not only allows for the separation of data and algorithms but also provides great flexibility in the organization of grammars and subgrammars, and in the control of the ... 1% of the corpus. A ccr~parison with the statistics of the French and Italian translations reveal approximately the sane distri- bution except for infinitival venbs. The higher frequency of...
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