design of synchronous machines
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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Design of machinery mechanisms and machines 2nd ed
Ngày tải lên :
08/04/2014, 11:35
... engineering education
and of the text Machine Design: An Integrated Approach. He is a Fellow of the Ameri-
can Society of Mechanical Engineers and a member of the Society of Automotive Engi-
neers. ... Principles of Mechanism in 1841 while a
professor of natural philosophy at the University of Cambridge, England. He attempted
to systematize the task of mechanism synthesis. He counted five ways of obtaining ... the quality of the design. Commercially available programs
such as Working Model* also allow rapid analysis of a proposed mechanical design. The
process then becomes one of qualitative design by...
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Báo cáo hóa học: " The Optimal Design of Weighted Order Statistics Filters by Using Support Vector Machines" doc
Ngày tải lên :
22/06/2014, 23:20
... hyperplane.
4. SUPPORT VECTOR MACHINES FOR
DICHOTOMOUS WOS FILTERS
4.1. Linear support vector machines for
dichotomous WOS filters
In the above section, the new approach of designing WOS
filter has reduced ... applications. In this
paper, SVMs are introduced into the design of WOS filters in
ordertoimproveperformance.
WOS filters are special subset of stack filters. Each stack
filter is based on a positive ... marginally im-
proved by using the conventional design approach of stack
filter or neural network. Although the adaptive neural fil-
ter can effectively remove noise of various kinds, including
Gaussian noise...
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genetic algorithm based optimal pwm in high power synchronous machines and regulation of observed modulation error
Ngày tải lên :
27/07/2014, 23:28
...
identification of the current harmonic model of synchronous machine and observation of
modulation error. In this approach, considering the equations of synchronous machine, a
model consisting of input ... capabilities of designing the torque
characteristics to meet the requirements of the driven load, have made them the optimal
choices for a multitude of industries. Economical utilization of these machines ... diagram of the system under test.
In this system, a field excited synchronous motor in the range of 80kW, with the steady state
excitation current of 25A is used.The main system setup consists of: ...
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DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 2 potx
Ngày tải lên :
08/08/2014, 12:23
... the quality of the design. Commercially available programs
such as Working Model* also allow rapid analysis of a proposed mechanical design. The
process then becomes one of qualitative design by ... motor. There are a myriad of other examples of fourbar coupler
curves used in machines and mechanisms of all kinds.
One other example of a very different application is that of the automobile suspen-
sion ... of the linkage assembly, and its motion is
along a set of coupler curves. The orientation of the wheel is also of concern in this case,
so this is not strictly a path generation problem. By designing...
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DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 3 pot
Ngày tải lên :
08/08/2014, 13:20
... orientation of the link which contains
the point of interest. The coupler curve is made to pass through a set of desired output
points. However, it is common for the timing of the arrival of the coupler ... rotation of the input rocker, link 2, through an as yet unspecified angle
~z.
Note also that the angle of the coupler link 3 at each of the precision positions is
defined by the angles of the position ... the coordinates
of vectors W,
Z,
D, and S, which define not only the lengths of those links but also the
locations of the fixed pivots Oz and
04
in the plane and the lengths oflinks 3 and 1....
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DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 4 pptx
Ngày tải lên :
08/08/2014, 13:20
... moving centrode at
one extreme of its path motion (i.e., at one of the positions ofh,3), then it will have a cusp
in its coupler curve. Figure 6-17b shows a coupler curve of such a point, drawn with
program ... linkage.
All of the coupler curves of points on link
3
will have the same path shapes as in the orig-
inallinkage. We now have, in effect, a "linkless" fourbar linkage, really one composed
of ... example shown in Figure 6-14 is a non-Grashof
fourbar. The lengths of its centrodes are limited by the double-rocker toggle positions.
All instant centers of a linkage will have centrodes. If the...
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DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 5 pps
Ngày tải lên :
08/08/2014, 13:20
... choice of displacement function. In fact, the cam designer
should not be as concerned with the displacement function as with its higher derivatives.
The
Fundamental law
of Cam Design
Any cam designed ... further
evidence of the folly of our earlier naive approach to earn design which dealt exclusive-
ly with the displacement function. The earn designer must be concerned with the higher
derivatives of displacement. ... delta functions, appearing in the derivative of acceleration, jerk. Thus
the corollary merely restates the fundamental law of cam design. Our naive designer
failed to recognize that by starting...
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DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 6 potx
Ngày tải lên :
08/08/2014, 13:20
...
When designing machinery, we must first do a complete kinematic analysis of our
design, as described in Part I of this text, in order to obtain information about the accel-
erations of the ... differential element of mass is also shown. The mass moment
(first moment of mass) of the differential element is equal to the product of its mass
and its distance from the axis of interest. With ... the masses of all the moving parts which
have these known accelerations. These parts do not exist yet! As with any design prob-
lem, we lack sufficient information at this stage of the design to...
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DESIGN OF MACHINERYAN INTRODUCTION TO THE SYNTHESIS AND ANALYSIS OF MECHANISMS AND MACHINES phần 7 potx
Ngày tải lên :
08/08/2014, 13:20
... velocity of 50 rad/sec. The torque varies a great deal within one cy-
cle of the mechanism, going from a positive peak of 341.7 Ib-in to a negative peak of
-166.41b-in. The average value of this ... of designs in a short time. There are infinities of viable
solutions to these problems. Iterate to find the best one! All links must be designed in
detail as to their geometry (mass, moment of ... magnitude and angle
of the counterweight's mR vector. Note that the angle of the mR vector for each link will
be referenced to that link's line of centers. Design the shape of the physical...
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SAP2000® Linear and Nonlinear Static and Dynamic Analysis and Design of Three-Dimensional Structures
Ngày tải lên :
06/09/2012, 15:56
...
1 - 2 Overview of the Program
1
Overview of the Program
SAP2000 is a stand-alone finite-element-based structural program for the
analysis and design of civil structures. It offers an intuitive, ... Property Type for Add area of the form. Scroll down the list
of import options until you find Import Double Angle – see Figure 7.
Single click on it.
D. In the Click to area of the Frame Properties ... to read this manual on
your computer screen.
During the course of this tutorial, we will explore many of the basic fea-
tures of SAP2000. Prepare to spend at least one hour going through this...
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SAP2000 Integrated Finite Elements Analysis and Design of Structures
Ngày tải lên :
06/09/2012, 15:56
... Select Mode.
24. Click the roof beam at the top of the braced frame to select it. Also click the joint at the top
of the chevron brace (center of braced frame roof beam) to select it.
25. From ... C-10 to enter the last roof beam.
The model now appears as shown in Figure C-11.
Figure C-11: Model After All Roof Level Beams Have Been Drawn
18. Select all of the roof level frame elements and ... Span Loads Used In SAP2000 Model
Roof Beams 39, 40, 51, 52
0.40 klf DL
0.12 klf LL
Roof Beams 41/44, 42, 47/50, 49
Roof Beams 45, 46
0.48 klf DL
0.24 klf LL
Roof Beams 43, 48
Second Floor Beams...
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The design of mat foundations
Ngày tải lên :
16/10/2012, 10:43
... being designed for a small office building with a total live load of 250 kips
and dead load of 500 kips. Find: (a) the depth D
f
for a fully compensated foundation, (b) the
depth D
f
if a soft ... of the clay layer, z/B = 18 ft / 40 ft = 0.45 and L/B = 60 ft / 40 ft = 1.50
2) At the middle of the clay layer, z / B = 22 ft / 40 ft = 0.55 and L/B = 60 ft / 40 ft = 1.50
3) At the bottom of ... 0.25
eo = 0.9
density (sat) = 119 pcf
Example 4.
Design the steel lying in the East-West direction of the mat shown below with external
dimensions of 42 feet by 74 feet. The columns are all 15”by...
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