speed control of three phase induction motor ppt
Design and Implementation of a Three-Phase Induction Motor Control Scheme
Ngày tải lên :
27/10/2013, 23:15
... of the degree of Bachelor of Engineering (Honours)
in the division of Electrical Engineering, I present the following thesis entitled “Design
and Implementation of a Three- Phase Induction Motor ... 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. ... designed to control a brush-less DC motor. However, by
constructing a feedback loop that can detect the outputs of an induction motor, we
can use this motor controller to control an induction...
- 93
- 693
- 1
Tài liệu Stability and Control of Large-Scale Dynamical Systems pptx
Ngày tải lên :
12/02/2014, 16:20
... Conservation of Energy and the First Law
of Thermodynamics 182
9.3 Nonconservation of Entropy and the Second Law
of Thermodynamics 187
9.4 Nonconservation of Ectropy 189
9.5 Semistability of Discrete-Time ... notion of vec-
tor dissipativity developed in Chapter 3 and optimality of the proposed
decentralized feedback control law. The proposed control framework is then
used to construct decentralized controllers ... Chapter 5, we introduce the notion of a control vector Lyapunov
function as a generalization of control Lyapunov functions [6], and show
that asymptotic stabilizability of a nonlinear dynamical system...
- 389
- 723
- 0
Tài liệu Báo cáo khoa học: "Limitations of Current Grammar Induction Algorithms" pptx
Ngày tải lên :
20/02/2014, 12:20
... development of entirely incremental
grammar induction algorithms instead of the
approaches of the systems discussed before.
1 Introduction
Grammar induction is a task within the field of nat-
ural ... suitable for the problem of gram-
mar induction. Also, incremental systems have the
advantage of an intuitive notion of time: it is al-
ways clear which working hypothesis of a grammar
is maintained.
Emile ... connected, a number of hypotheses are generated,
for example: ‘a book’ is a complement of ‘Tim’; ‘a
book’ is a complement of ‘John gave Tim’; ‘a book’
is a second complement of ‘gave’. Naturally,...
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- 399
- 0
Hepatitis and Liver Cancer: A National Strategy for Prevention and Control of Hepatitis B and C ppt
Ngày tải lên :
06/03/2014, 01:20
... estimates of the burden of acute hepatitis B and hepatitis C in United
States
2. Identify chronic cases of hepatitis B and C and measure prevalence
x Develop accurate estimates of the burden of chronic ... Academy of Sciences, the National Academy of Engineering,
the
Institute of Medicine, and the National Research Council:
ã Download hundreds of free books in PDF
ã Read thousands of books ...
Prevention and Control of Hepatitis B and C
Heather M. Colvin and Abigail E. Mitchell, Editors;
Committee on the Prevention and Control of Viral
Hepatitis Infections; Institute of Medicine
...
- 191
- 457
- 0
Báo cáo khoa học: Functional interplay between viral and cellular SR proteins in control of post-transcriptional gene regulation pptx
Ngày tải lên :
23/03/2014, 06:20
... inter-
actions of SR proteins [1–5]. Reversible phosphoryla-
tion of SR proteins is important for assembly and
function of the spliceosome and for proper regulation of
alternative splicing, and also controls ... role in the life
cycle control of viruses, which involves a series of
alternative splicing events for expression of viral gen-
ome or proteins. However, if the expression of these
host factors ... the
upstream region of this binding site to preclude splic-
ing activators and hence inhibit splicing. Overexpres-
sion of ASF ⁄ SF2 can antagonize the negative effect of
hnRNP A1 on splicing of the HIV-1...
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- 0
Báo cáo "Determining thermal expansion coefficients of three-phase fiber composite material reinforced by spherical particles " potx
Ngày tải lên :
28/03/2014, 13:20
... coefficients of three- phase composite material more
than that of two - phase composite material in [7]. So, embedding spherical inclusions into continous
matrix phase of two - phase fiber composite ... coefficients of matrix and particle phase.
2 3
,
K K
: bulk moduli of matrix and particle phase.
2 2
G
à
=
: shear modulus of matrix phase.
3
ξ
: volume fraction of particle phase.
2
α
: ... coefficients of three- phase composite
material. This resembles case 3 when letting volume fraction of the fibre phase be constant and
increasing step by step volume fraction of the particle phase. ...
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- 0
Analysis and Control of Corn plex Nonlinear Processes pptx
Ngày tải lên :
28/03/2014, 22:20
... the crossing
of
a pair of simple eigenvalues of the linearization of rotating waves through
the imaginary axis. Similarly, Mantel and Barkley
[42]
described periodic
forcing of meandering ... production and dispersal
of spores. During the early phase of aggregation, chemotactic movement
can proceed in form of spiral waves
[17].
Spiral waves also arise in the oxidation
of
carbon-monoxide ... the intensity
of the noise. The power-spectrum
of
the noise is the Fourier transform
of the correlation function. In case of the &function it is a constant and
independent of the frequency...
- 453
- 636
- 0
Analysis and Control of Linear Systems - Chapter 0 pptx
Ngày tải lên :
09/08/2014, 06:23
... elements
of modeling and identification. All modern control theories rely on the availability
of mathematical models of processes to control them.
Modeling is therefore upstream of the control ... Management of saturations 349
11.5. Methodology 354
11.5.1. Intuitive approach 354
11.5.2. Reduction of the noise on the control by choice of degrees 356
11.5.3. Choice of the dynamics of A
m
... obtain efficient control laws.
Limits to the automated systems performances generally come from the restricted
power of motors, precision of captors and variability of the behavior of the
processes,...
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- 344
- 0
Analysis and Control of Linear Systems - Chapter 1 pptx
Ngày tải lên :
09/08/2014, 06:23
... values of
ξ
.
10
0
-10
-20
-30
0
-45
-90
-135
-180
1
T
1
1
T
2
Module (dB )Phase (degree)
Figure 1.23. Bode diagram of a second order system with
ξ
≥
1
20 Analysis and Control of Linear ... gain,
()
fΦ is the phase or phase difference of the
frequency response.
Through the Laplace transform, we obtain the transfer function of the system
()
pH , which is often referred to as ... intersection of the convergence
domains of
()
X
p and ()Yp
The Laplace transform also makes it possible to determine the behavior at the
time limits of a causal signal with the help of the following...
- 42
- 331
- 0
Analysis and Control of Linear Systems - Chapter 4 ppt
Ngày tải lên :
09/08/2014, 06:23
...
The controllability indices and the invariant factors of the non-controllable part
(if it exists) of the pair (A, B) (see section 4.2.3) form a set of full invariants under
the action of the ... the analysis phases. The following example illustrates the
importance of the location of zeros with respect to the solution of a traditional
control problem which is the pursuit of model, by ... matrix of
V and
t
W a basis of the canceller at the left of W (i.e.
a maximal solution of equation W
t
W = {0}), a basis of LV is obtained by directly
preserving only the independent columns of...
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- 615
- 0
Analysis and Control of Linear Systems - Chapter 5 pptx
Ngày tải lên :
09/08/2014, 06:23
... of ν
0
.
142 Analysis and Control of Linear Systems
A discrete-time deterministic signal y[k],k ∈Zis, by definition, a sequence of
complex numbers:
y =
y[k]
k∈Z
In short, we often speak of ... the estimation of the frequency of noisy sine curves, deals
with determining the argument of the poles of an AR model identified by maximum
likelihood.
In the general case, we speak of an ARMA (autoregressive ... y
2
)
=
y
1
y
2
[5.9]
152 Analysis and Control of Linear Systems
Figure 5.1. Typical power spectrum of an MA (left)
or AR (right) model
In the case of a single denominator (n
c
=0), we talk of an AR (autoregressive)
model,...
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- 0
Analysis and Control of Linear Systems - Chapter 11 pptx
Ngày tải lên :
09/08/2014, 06:23
... and not “s”.
366 Analysis and Control of Linear Systems
Figure 11.17. Evolution of
o
A
sA
(
⎯ο⎯
) .of
mo
'
AA
sAS
and of
m
A
B
(
⎯⎯
) in the case of
4
o
o
1
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+=
T
sA
... Analysis and Control of Linear Systems
The number of equations is the number of rows in the Sylvester system and thus:
number of equations =
1
om
+∂+∂ AA [11.36b]
Considering the uniqueness of the ... result of these choices: the
limit sensitivity function is always of a module less than 1.
Similarly, the presence of strong dynamic zeros leads, through the procedure of
optimal choice of A
m
,...
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- 454
- 0
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- khảo sát chương trình đào tạo gắn với các giáo trình cụ thể
- xác định thời lượng học về mặt lí thuyết và thực tế
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- điều tra đối với đối tượng giảng viên và đối tượng quản lí
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