electric machine
Tài liệu Electric Machinery Fundamentals docx
Ngày tải lên :
24/12/2013, 08:16
... total reluctance is
Electric Machinery Fundamentals
1
Chapter 1:
Introduction to Machinery Principles
1-1. A motor’s shaft is spinning ... DISTRIBUTED WINDINGS 288
APPENDIX C: SALIENT POLE THEORY OF SYNCHRONOUS MACHINES 295
APPENDIX D: ERRATA FOR ELECTRIC MACHINERY FUNDAMENTALS 4/E 301
... m
B
V
v
Bl
== =
The
input
power to the linear machine under these conditions is
( )( )
in
100 V 50 A 5000 W
B
PVi== =
The
output
power from the linear machine under these conditions is
(...
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electric machine ch02
Ngày tải lên :
14/02/2014, 16:35
... devices comprising two or more electric circuits coupled
by a common magnetic circuit.
Its analysis involves many of the principles essential to the study of electric machinery.
§2.1 Introduction ... per-unit is summarized as follows:
Machine Ratings as Bases
When expressed in per-unit form on their rating as a base, the per-unit values of machine
parameters fall within a relatively ... “small” in some sense.
§2.9 The Per-Unit System
Computations relating to machines, transformers, and systems of machines are often carried
out in per-unit system.
18
21
Manufacturers...
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electric machine ch03
Ngày tải lên :
14/02/2014, 16:35
... Field Systems
Many electromechanical devices have multiple electrical terminals.
Measurement systems: torque proportional to two electric signals; power as the product of
voltage and current. ... differential electric energy input
= differential mechanical energy output
mech fld
dW f dx=
= differential change in magnetic stored energy
fld
dW
Here
is the voltage induced in the electric ... charge in the presence of
electric and magnetic fields.
F q
(
)
BvEqF
×
+
=
(3.1)
F : newtons, : coulombs, : volts/meter, q E
B
: telsas, : meters/second v
In a pure electric- field system,...
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electric machine ch04
Ngày tải lên :
14/02/2014, 16:36
... Rotating Machinery
The behavior of electric machinery is determined by the magnetic fields created by currents in
the various windings of the machine.
The investigations of both ac and dc machines ... laminations of electrical steel, insulated from each other, to reduce
eddy-current losses.
§4.2 Introduction to AC And DC Machines
§4.2.1 AC Machines
Traditional ac machines fall into ... Nonsalient-Pole Machines
18
Chapter 4 Introduction to Rotating Machines
The objective of this chapter is to introduce and discuss some of the principles underlying the
performance of electric machinery,...
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electric machine Chapter 5 Synchronous Machines
Ngày tải lên :
14/02/2014, 16:36
... Synchronous -machine equivalent circuit showing air-gap and
leakage components of synchronous reactance and air-gap voltage.
4
Chapter 5 Synchronous Machines
Main features of synchronous machines: ... 5.5 Open-circuit characteristic of a synchronous machine.
§5.3.2 Short-Circuit Characteristic and Load Loss
11
Figure 5.3 Synchronous -machine equivalent circuits:
(a) motor reference ...
4
Chapter 5 Synchronous Machines
Main features of synchronous machines:
A synchronous machine is an ac machine whose speed under steady-state conditions is
proportional to the frequency of...
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electric machine Chapter 6 Polyphase Induction Machines
Ngày tải lên :
14/02/2014, 16:37
... rotor resistance.
§6.2 Currents and Fluxes in Polyphase Induction Machines
§6.3 Induction-Motor Equivalent Circuit
Only machines with symmetric polyphase windings exited by balanced polyphase ...
222
2
2
2
2
ˆ
ˆ
ˆ
ˆ
jsXRZ
I
Es
I
E
s
s
s
+===
(6.15)
2
2
2
2
2
ˆ
ˆ
jX
s
R
I
E
Z +==
(6.16)
3
6
12
Figure 6.14 Induction -machine torque-slip curve showing braking, motor, and generator regions.
Figure 6.15 Computed ... windings exited by balanced polyphase voltages are
considered. It is helpful to think of three-phase machines as being Y-connected.
Stator equivalent circuit:
(
)
11121
ˆˆˆ
jXRIEV ++=
(6.8)...
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electric machine Chapter 7 DC Machines
Ngày tải lên :
14/02/2014, 16:44
...
0
0
aa
E
n
n
E
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
=
(7.23)
7
§7.4 Analytical Fundamentals: Electric- Circuit Aspects
Analysis of dc machines: electric- circuit and magnetic-circuit aspects
Torque and power: ... electromagnetic power differs from the mechanical power at the machine
shaft by the rotational losses and differs from the electric power at the machine terminals
by the shunt-field and armature
R
I
2
... magnetization curves of a dc machine.
Various methods of excitation of the field windings are shown in Fig. 7.4.
Figure 7.4 Field-circuit connections of dc machines:
(a) separate excitation,...
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Chapter 15 introduction to the design of electric machinery
Ngày tải lên :
16/02/2014, 18:55
... of Electrical and Electronics Engineers, Inc. Published 2013 by John Wiley & Sons, Inc.
INTRODUCTION TO THE
DESIGN OF ELECTRIC
MACHINERY
15
616 INTRODUCTION TO THE DESIGN OF ELECTRIC MACHINERY
however, ... parameters and performance data from machine design 100 (the 100th
machine design in order of increasing mass). This machine has significantly lower loss
than the first machine (252 W vs. 490 W), and ... DESIGN OF ELECTRIC MACHINERY
REFERENCES
[1] S.D. Sudhoff, J. Cale, B. Cassimere, and M. Swinney, “Genetic Algorithm Based Design
of a Permanent Magnet Synchronous Machine, ” 2005 International Electric...
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electric machinery
Ngày tải lên :
21/03/2014, 12:08
...
Electric Machinery
continues to be to build a strong
foundation in the basic principles of electromechanics and electric machinery.
Through all of its editions, the emphasis of
Electric Machinery ... many contemporary electric-
machine applications. This topic is included in Chapter 10 of this edition of
Electric
Machinery
in recognition of the fact that many electric- machinery courses ... transformer analysis form the basis for the
ensuing discussion of electric machinery.
Practically all transformers and electric machinery use ferro-magnetic material
for shaping and directing...
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- 2.2K
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Electric Machines and Drives Part 1 pot
Ngày tải lên :
21/06/2014, 01:20
... copies can be obtained from orders@intechweb.org
Electric Machines and Drives, Edited by Miroslav Chomat
p. cm.
ISBN 978-953-307-548-8
ELECTRIC MACHINES
AND DRIVES
Edited by Miroslav Chomat
Contents
VI
Swarm ... Based Controller for Electric
Machines and Hybrid Electric Vehicles Applications 161
Omar Hegazy, Amr Amin, and Joeri Van Mierlo
Operation of Active Front-End Rectifier
in Electric Drive under ... measurement as
defined in IEC 34-2 standard “Rotating electrical machines – Part 2: Methods for
determining losses and efficiency of rotating electrical machinery from tests”. The standard
first introduced...
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Electric Machines and Drives Part 2 docx
Ngày tải lên :
21/06/2014, 01:20
... with the adoption of Standard CAN/CSA-
Electric Machines and Drives
14
Fig. 7. Stator Premium motors
Fig. 8. Rotor Premium motors
Electric Machines and Drives
16
Fig. 11. Drive ... value is less a 0.2 %,. But, most electric motors are designed to
function at 50 % to 100 % of rated value. Fig. 9 also shows that maximum Premium motor
Electric Machines and Drives
26
arranged ...
Generally, some electric machines such as induction machines and synchronous reluctance
motors require reactive power for operation. While the reactive power required by a
synchronous machine can be...
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Electric Machines and Drives part 6 ppt
Ngày tải lên :
21/06/2014, 01:20
... Torque
Fig. 6. FLC control with 36 rad/s rotor speed reference
108
Electric Machines and Drives
Electric Machines and Drives
94
new machine model. Further, in the proposed algorithms rotor flux ... (i.e.
e
ω
=
ω
−ω
re f
), a proportional integral compensation is proposed, as follows
100
Electric Machines and Drives
Electric Machines and Drives
90
incorporated into a vector controlled induction motor ... drive with step increase in speeds
Electric Machines and Drives
96
Verghese, G. C. & Sanders, S. R. (1988). Observers for flux estimation in induction machines.
IEEE Trans. Ind. Elec,...
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Electric Machines and Drives part 7 ppt
Ngày tải lên :
21/06/2014, 01:20
... complete dynamic model of the electric machine. From these equivalent
circuits the electrical equations of BDFTIG can be determined as shown in the next section.
6.2 Electrical system equations ... +(L
r
i
d
r
+ L
mp
i
d
sp
− L
mc
i
d
sc
)ω
r
128
Electric Machines and Drives
where σ is an arbitrary angle.
The model of the DFIG-IM in the stator frame of the two machines is given by (see (4) and (3)
for ... Applications, EPE ’09,
pp. 1 –8.
Krause, P. C. (1986). Analysis of electric machinery, McGraw-Hill.
Leonhard, W. (1996). Control of Electrical Drives,Springer-Verlag.
Marino, R., Peresada, S. &...
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Electric Machines and Drives part 8 pdf
Ngày tải lên :
21/06/2014, 01:20
... R
r
i
d
r
+
dΨ
d
r
dt
+ ω
r
Ψ
q
r
(67)
The electrical torque creation in the power machine is governed by the same principles that
apply to any induction machine. The general equation of the electrical torque in this ... derive the electrical torque for the control machine, we can
use the same general equation for the electrical torque. This case cannot be simplified because
the stator fluxes of the control machine ... could easily
be applied to other electrical machine. This scheme is based on a Robust Model Reference
Adaptive Controller and measurements of stator currents of a machine with standstill rotor.
From...
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- machine learning
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- the wizard and the war machine
- fundamentals of electric circuits
- electric motors and drives
- ebook electric motors and drives
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- errata for electric machinery
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