speed control of induction motor using pwm technique pdf
POWER ELECTRONIC CONTROL OF INDUCTION MOTORS ppt
Ngày tải lên :
11/07/2014, 05:20
... speed operation is the required
rms value of the fundamental harmonic of the output phase to neutral voltage of the AC-AC
voltage controller.
Induction
machine
Fig. 6.5: Speed control of an induction ... with this type of load in practice.
Speed control by stator voltage variation is realised by using AC-AC voltage controller
in each stator phase of the machine. Voltage controller is of the same ... prevailing one in closed-loop control of induction motors fed from PWM
inverters. Explanation of this method however requires at first the introduction of the notion of
the space vector.
Let us...
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Báo cáo lâm nghiệp: "Detection of cavitation events upon freezing and of water in stems using ultrasound technique" pdf
Ngày tải lên :
09/08/2014, 04:20
...
Structure
and
the
Ascent
of Sap.
Springer-Verlag,
Berlin,
pp. 143
Detection
of
cavitation
events
upon
freezing
and
thawing
of
water
in
stems
using
ultrasound
techniques
A.
Raschi
1
and ...
rising
of
the
temperature.
Materials
and
Methods
The
experiment
was
carried
out
in
the
laborato-
ry
of
the
Agronomy
Department
of
the
Universi-
ty
of
Firenze,
Italy,
using ...
place
upon
the
freezing
and
the
thawing
of
water
in
vessels.
In
fact,
the
existence
of
cavitative
events
as
a
consequence
of
cycles
of
freezing
and
thawing
has
been
evidenced...
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Báo cáo khoa học: "Biological Control of Sheep Parasites using Duddingtonia" pdf
Ngày tải lên :
12/08/2014, 18:21
...
ã Control group: The same number and breed
of ewes and number of lambs of the ewes in
the Fungus group was allocated to an area of
comparable size, topography and pasture
quality for each of ... BL, Rydzik A,
Yeates GW: Evaluation of biological control of
sheep parasites using Duddingtonia flagrans un-
der commercial farming conditions on the island
of Gotland, Sweden. Vet. Parasitol. ... also be a reflection of good
nutrition during the lamb-finishing period.
Biological control is one of the more promising
non-chemotherapeutic approaches to parasite
control of livestock (which...
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Tài liệu Vibration of Airplane Wing Using Pro/M pdf
Ngày tải lên :
19/01/2014, 05:20
... 1
ME-430 INTRODUCTION TO COMPUTER AIDED DESIGN
Vibration of Airplane Wing Using Pro/M
Dr. Herli Surjanhata
Use Notepad or Text Editor in Unix system to create...
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Báo cáo khoa học: "Ecological Evaluation of Persuasive Messages Using Google AdWords" pdf
Ngày tải lên :
07/03/2014, 18:20
... performance of each single
ad (its persuasiveness, from our point of view):
ã CTR, Click Through Rate: measures the num-
ber of clicks divided by the number of impres-
sions (i.e. the number of times ... scenario and some pilot studies to test
the feasibility of our approach.
2 Advantages of Ecological Approaches
Evaluation of the effectiveness of persuasive sys-
tems is very expensive and time consuming, ... description of the experimental
setup). It was meant to test broadly how affective
variations in the body of the ads performed. The two
variations contained a fragment of a commentary of
the museum...
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Báo cáo khoa học: "Representing a System of Lexical Types Using Default Unification" pdf
Ngày tải lên :
17/03/2014, 23:20
... of sub-
ject control of transitive subject -control verbs.
In section 2, a brief description of the use of de-
faults and YADU is given. In section 3, we present
the results of representing ... Number 13.
264
Proceedings of EACL '99
Representing a System of Lexical Types Using Default
Unification
Aline Villavicencio
Computer Laboratory
University of Cambridge
New Museums Site ...
adequacy of different default unification oPera-
tions, like the one used in DATR, for this kind
of linguistic description. This work is part of a
larger project concerned with the investigation of...
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Báo cáo hóa học: "Inhibiting adenoid cystic carcinoma cells growth and metastasis by blocking the expression of ADAM 10 using RNA interference" pdf
Ngày tải lên :
18/06/2014, 16:20
... (d) Quantification of immunohistochemical staining of ADAM 10 from b using
Image Pro Plus software (*p < 0.001 compared with SACC-LM). SACC-LM (high metastatic potential control) ; SACC-mock ...
www.biomedcentral.com/submit
Xu et al. Journal of Translational Medicine 2010, 8:136
http://www.translational-medicine.com/content/8/1/136
Page 10 of 10
Figure 2 Detection of the meta static potential of SACC-LM and SACC-83 ... proliferation, supporting
theroleofADAM10incellgrowthinSACC-LMcells
(Figure 5 C). In addition, the affect of gene silencing
of ADAM 10 on the cell migration ability of SACC-LM
cells was also investigated...
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Báo cáo hóa học: " Research Article Recognition of Planar Objects Using Multiresolution Analysis" pdf
Ngày tải lên :
22/06/2014, 23:20
... η(t)andη
i
(t)oflength2
7
are the in-
variants of the unknown and reference objects, respectively.
The maximum of the correlations identifies the unknown
object.
The recognition performance of the affine-invariant
function ... exactly represented by a sum of weighted
and shifted scaling functions is shown to be tied to the num-
ber of zero moments of wavelet filters as well [14]: all mo-
ments of the wavelet (high-pass) ... the affine-invariant η(t)isafunction
of the amount of noise on the boundary curve of the object
as well. Thus, a final experiment is made, where the realiza-
tions of noise are produced in such a way...
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Báo cáo y học: "Association of chemokine receptor gene (CCR2CCR5) haplotypes with acquisition and control of HIV-1 infection in Zambians" pdf
Ngày tải lên :
13/08/2014, 01:20
... modes of transmission
[11,17,28,29]. Further confirmation of the effect of HHE
highlights its potential impact on clinical HIV-1 disease
control in diverse populations, in contrast to that of the
protective ... 3). Because this pattern of association
could be explained by combinations of haplotypes car-
ried, we explored the effect of diplotypes further.
Among all diplotypes of frequency > 0.05, HHD/HHE
showed ... comparison.
As for the influence of CCR2-CCR5 alleles or haplo-
types on transmission and acquisition of infection, the
highly significant deviation of the distribution of haplo-
types from HWE among...
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Design and Implementation of a Three-Phase Induction Motor Control Scheme
Ngày tải lên :
27/10/2013, 23:15
... a control strategy that varies the frequency and voltage of the
signal applied to the windings of the induction motor, while controlling the flux created
in the air-gap of the induction motor. ... outputs of an induction motor, we
can use this motor controller to control an induction machine.
ã TMS320F243 DSP controller. This is manufactured by the Texas Instruments
Company and is one of ... the induction
motor s many advantages are clearly explained. Wildi also presents the two types of
induction motors: “the squirrel cage induction motor and the “wound motor . An
explanation of...
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DC bus control of variable speed wind turbine using a buck boost converter
Ngày tải lên :
03/01/2014, 19:15
...
Search rules of the various cases of operation are summarized
in the table I.
Fi
g.4. Operation modes of buck boost converter
2
Unlike constant -speed control, a variable -speed control can ...
Fig.5. Probable displacement of the operating point
between the operating power and the maximum power, in the
event of change of the wind speed, the control of the buck-
boost converter ... control can
adjust the speed of the turbine as the wind speed changes, so
as to operate at the peak of the Cp curve. This will maximize
the power generated for a particular wind speed, as it shown...
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