design of synchronous machines ppt
Tài liệu Steady State Operation of DC Machines pptx
Ngày tải lên :
17/12/2013, 14:15
... 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...
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Tài liệu Synchronous Machines pptx
Ngày tải lên :
23/01/2014, 06:20
... 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...
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Tài liệu Design of a USB Device Driver ppt
Ngày tải lên :
13/12/2013, 00:15
... 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...
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Tài liệu The Design of Rolling Bearing Mountings P2 ppt
Ngày tải lên :
25/12/2013, 05:17
... 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...
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Tài liệu The Design of Rolling Bearing Mountings P1 pptx
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...
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Tài liệu The Design Of Manufacturing Systems P1 pptx
Ngày tải lên :
19/01/2014, 18:20
... 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...
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Tài liệu The Design Of Manufacturing Systems P2 pptx
Ngày tải lên :
25/01/2014, 13:20
... 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...
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Tài liệu Design of Feedback Control Systems for Stable Plants with Saturating Actuators ppt
Ngày tải lên :
18/02/2014, 10:20
... 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)...
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Tài liệu The Design of Prestressed Concrete Bridges ppt
Ngày tải lên :
18/02/2014, 18:20
... 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...
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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
Ngày tải lên :
07/03/2014, 00:20
... 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...
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DESIGN OF ROTATING ELECTRICAL MACHINES pdf
Ngày tải lên :
07/03/2014, 10:20
... 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...
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Báo cáo khoa học: "THE DESIGN OF THE KERNEL ARCHITECTURE FOR THE EUROTRA* SOFTWARE" pptx
Ngày tải lên :
08/03/2014, 18:20
... 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...
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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
Ngày tải lên :
16/03/2014, 13:20
... 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,...
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