design of synchronous machines ppt

... rotor. Principle of operation of this assembly is illustrated by means of Fig. 1. Rotor winding is shown in a very simplified manner, as consisting of just one coil, connected to two segments of the commutator. ... equations for each type. b) Explain the role of commutator in DC machines using simple representation of rotor winding with just one turn and sketch the waveform of current in the turn assuming that ... circuits of (i) separately and (ii) series excited DC motors and write the basic steady-state equations for each type. c) Explain the role of commutator in DC machines using simple representation of...

Ngày tải lên: 17/12/2013, 14:15

... The machine of Fig. 2 is shown as being of 2-pole structure for simplicity. This type of synchronous machines is often called hydro-machine or salient-pole synchronous machine, since these machines ... huge contrast to some other types of electric machines (DC machines, induction machines) where the speed of rotation is dependent on the loading of the machine. Synchronous machine with non-uniform ... E Levi, 2000 1 SYNCHRONOUS MACHINES 1. INTRODUCTION Synchronous machines come in a variety of different constructions and designs. The differences occur in the physical outlay of the rotor and...

Ngày tải lên: 23/01/2014, 06:20

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Ngày tải lên: 24/03/2014, 19:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

... code execution of critical routines Optimize code execution of critical routines – – Design a solution with parallelism of processing and data Design a solution with parallelism of processing ... depth multiple packet depth – – Hardware Retry of Packet Transfers on error Hardware Retry of Packet Transfers on error Key Features of a USB Controller Key Features of a USB Controller 18 ? ? Hardware ... controls camera via control or bulk endpoints. bulk endpoints. – – Design of the communications protocol is contingent Design of the communications protocol is contingent on the Twain data source...

Ngày tải lên: 13/12/2013, 00:15

... end of this publication they are summarized and explained in a glossary of terms, some supplemented 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 by inclining of rolls 1 and 3 and by counterbending of rolls 2 and 4. Moreover, the narrow tolerance of the foil thickness requires a high radial runout accuracy of the bearings and adequate...

Ngày tải lên: 25/12/2013, 05:17

... standard-gauge locomotive The Design of Rolling Bearing Mountings Design Examples covering Machines, Vehicles and Equipment Publ. No. WL 00 200/5 EA FAG OEM und Handel AG A company of the FAG Kugelfischer ... bearings for domestic washing machines are dimensioned for an index of dynamic stressing f L = 0.85 1.0. These values correspond to a nominal life of 300 500 hours of spinning. In the example ... arranged. Bearing selection The 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. They are supported...

Ngày tải lên: 25/12/2013, 05:17

... at the core of the contents of this volume. This set of volumes consists of seven distinctly titled and well-integrated volumes on the broadly significant 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...

Ngày tải lên: 19/01/2014, 18:20

... 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 ASME Computers ... the design stage in order to decrease the number of design iterations. Within the CE context, major research effort is being devoted in the development of seamless integrated engineering design ... Furthermore, the design by features approach assumes that the designer is capable of choosing the best set of features to model a given artifact that has complex interacting features. The notion of capturing...

Ngày tải lên: 25/01/2014, 13:20

Ngày tải lên: 13/02/2014, 20:20

... Page 28 4.3 Simulation of a Model of the F8 Aircraft The 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 saturation upon the direction of the control vector. Page 3 designed. When the signals are ... described above, 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 17 r … Logic ' I, - ex(t)I K(s)...

Ngày tải lên: 18/02/2014, 10:20

... 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. 1 The nature of design 1.1 Design...

Ngày tải lên: 18/02/2014, 18:20

... Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, Japan 2 Department of Life Science, Graduate School of Life Science, University of Hyogo, Japan 3 ... available: Fig. S1. Stereoview of the catalytic cleft of Hyb-24DN. Fig. S2. Stereoviews of surface structure of Ald-bound and unbound Hyb-24DNY. Fig. S3. Stereoview of the catalytic cleft of Hyb- 24DNY and ... coordinates of Hyb-24DN-A 112 –Ald for protein crystals of Hyb-24D-A 112 – Ald and of Hyb-24DNY-A 112 –Ald. Several cycles of manual model rebuilding were performed by xfit [24]. Results of the crystal...

Ngày tải lên: 07/03/2014, 00:20

... Synchronous Machines 395 7.2.11 Synchronous Reluctance Machines 400 7.3 DC Machines 404 7.3.1 Configuration of DC Machines 404 7.3.2 Operation and Voltage of a DC Machine 405 7.3.3 Armature Reaction of ... Shift of Damper Bar Slotting from the Symmetry Axis of the Pole 392 7.2.8 V Curve of a Synchronous Machine 394 7.2.9 Excitation Methods of a Synchronous Machine 394 7.2.10 Permanent Magnet Synchronous ... co-authorship of Professor Tapani Jokinen, who has spent decades in developing the Finnish machine design profession. An important view of electrical machine design is provided by Professor Val ´ eria...

Ngày tải lên: 07/03/2014, 10:20

... 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...

Ngày tải lên: 08/03/2014, 18:20

... ideal template for the design of potent, specific and stable furin inhibitors. Here we report the design and synthesis of various peptide analogs derived from the Lys fragment of MBTI and their functional ... of enzyme was added to release 15 nmol of MCA in the 1 min enzyme reaction. For determination of the inhibitory activity, a fixed amount of enzyme was first incu- bated with different amounts of ... inhibitory activity of the Lys domain was higher than that of the Arg domain, this study focused on the former. The Lys domain con- sists of two peptide chains, which are composed of 26 and nine residues,...

Ngày tải lên: 16/03/2014, 13:20