electric motor drives krishnan ebook
Pseudo vector control – an alternative approach for brushless DC motor drives
Ngày tải lên :
03/01/2014, 19:46
... system, just like for the
case of PM Synchronous Motors (sine type machines).
Index Terms Brushless DC motor, Trapezoidal type machine,
PM synchronous motor, Sine type machine, Vector control,
Pseudo-vector ... I
NTRODUCTION
A. Sine-wave PM Motor vs. Square-wave Motor: Vector Control
vs. Phase Current Control
With the recent development of permanent magnet (PM)
materials, PM (brushless) motors have become more ... operation of the
whole drive. PM motors can be divided into 2 categories
depending on its current wave-form [1]:
ã Sine-wave PM motor, which is also called PM
synchronous motor (PMSM), is fed by sine-wave...
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Tài liệu Electric Motor - động cơ điện ppt
Ngày tải lên :
26/01/2014, 08:20
... the
stator winding is the armature, or electrical power input element. (In
dc and Universal motors, this is reversed, with the armature contained
on the rotor.)
In most electrical machines, the rotor ... 1997, “Rotating Electrical Machines,
Part 9, “Noise Limits.”
n IEC 34–12, 1980, “Rotating Electrical Machines, Part 12: Starting
Performance of Single-speed, Three-phase Cage Induction Motors for
Voltages ... zero in a
three-phase motor, since the mmf’s of the three phases are 120° apart
for both backward and forward components of all of them. Finally,
therefore, a three-phase motor has the following...
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Chapter 13 induction motor drives
Ngày tải lên :
16/02/2014, 18:54
... Electronics Engineers, Inc. Published 2013 by John Wiley & Sons, Inc.
INDUCTION MOTOR DRIVES
13
514 INDUCTION MOTOR DRIVES
Noting that ω
e
= ω
s
+ ω
r
, and that
P
P
T
out r e
=
2
ω
(13.3-16)
(13.3-15) ...
′
=i
qr
e
0
.
530 INDUCTION MOTOR DRIVES
Figure 13.7-1. Indirect rotor field oriented control.
Figure 13.7-2. Start-up performance of indirect field oriented drive.
506 INDUCTION MOTOR DRIVES
λ
m
/λ
b
versus ... V
0
V
7
V
0
V
7
V
0
V
7
−1 0 V
5
V
6
V
1
V
2
V
3
V
4
Figure 13.8-3. Step response of an induction motor with DTC.
520 INDUCTION MOTOR DRIVES
By suitable choice of reference frame, (13.4-7) is achieved; therefore...
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Chapter 14 permanent magnet AC motor drives
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16/02/2014, 18:54
... 2013 Institute of Electrical and Electronics Engineers, Inc. Published 2013 by John Wiley & Sons, Inc.
PERMANENT-MAGNET AC
MOTOR DRIVES
14
556 PERMANENT-MAGNET AC MOTOR DRIVES
The differential ... 14.1-1. Permanent-magnet ac motor drive.
Electrical
System
Command
Signal
Power
Converter
Control
PM
AM
Mechanical
System
Sensors
566 PERMANENT-MAGNET AC MOTOR DRIVES
14.7-5 illustrates the ... PERMANENT-MAGNET AC MOTOR DRIVES
The structure of the control algorithms determines the type of permanent-magnet
ac motor drive, of which there are two main classes, voltage-source-based drives and...
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power electronics and motor drives - advances and trends
Ngày tải lên :
05/03/2014, 09:32
... significant events in the history of power electronics and motor drives.
22 Power Electronics and Motor Drives
ã 1891 Ward-Leonard dc motor speed control is introduced
ã 1897 Development of three-phase ... economy.
GASOLINE
OR
METHANE
WATER
ELECTRO
LYSIS
WIND
TURBINE
WIND
GENERAT
OR
H
2
STORAGE
(LIQUID
ORGAS)
ELECTRICITY
ELECTRICITYFROM
GRID
COMPRESSOR
O
2
AIR
H
2
+
PEMFC
ULTRACAPACITOR
OR
BATTERY
REFORM
ER
FUEL
CELL
CONVER
TER
MOTOR
14 Power Electronics and Motor Drives
FIGURE 1.11 ... induction and dielectric
heating equipment are widely used. The dc and ac motor drives possibly constitute the
largest area of applications in power electronics.
6 Power Electronics and Motor Drives
...
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Practical Electric motor handbook pptx
Ngày tải lên :
09/03/2014, 17:20
... the electric motor. The engine-
generator set can be used not only to charge the battery but, bypassing the
battery it can power the electric motor. In the parallel hybrid, the electric
motor, ... DC shunt
motor (and the AC squirrel-cage induction motor) display exceedingly
good speed regulation. In contrast, other motors, such as the DC/AC series
motor and some DC compound motors show ... insights relating to
electric motors. Rather than motor design, their chief concerns lie with the
selection, system installation, operation and performance evaluation of
electric motors. In the pursuit...
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Electric motor controls tutorial
Ngày tải lên :
13/05/2014, 11:23
... which the overloads are located.
2
MOTOR STARTING
All motors must have a control device to start and stop the motor called a motor controller”.
Motor Controller
A motor controller is the actual ... Area
Amperage
Time
Motor Current Draw
Motor Running Current
Starting In-Rush Current
Overload Protection
Overload protection is installed in the motor circuit and/or motor to protect the motor from damage
from ... starts.
6
MOTOR PROTECTION
Motor protection safeguards the motor, the supply system and personnel from various operating
conditions of the driven load, the supply system or the motor itself.
C Motor...
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..Power Electronics and Motor Drives..Power Electronics and Motor DrivesAdvances and pdf
Ngày tải lên :
19/06/2014, 13:20
... 5 Current-Fed Converters 281
Chapter 6 Electrical Machines for Variable-Speed Drives 325
Chapter 7 Induction Motor Drives 391
Chapter 8 Synchronous Motor Drives 477
Chapter 9 Computer Simulation ... for
variable-frequency drives. Chapter 7 deals with control and estimation techniques for
induction motor drives, whereas Chapter 8 deals with control and estimation techniques
for synchronous motor drives. ... speed control of a dc
motor in a subway or to generate a regulated dc supply from a storage battery. Motor drives
are usually included in power electronics because the motors require variable-frequency
and/or...
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Research on field weakening based on reactive power with BLDC motor for electric vehicle application
Ngày tải lên :
03/01/2014, 19:47
... with
BLDC Motor for Electric Vehicle Application
∗
Jinsong Kang
Department of Electrical Engineering,
TongJi University,Shanghai,P.R.C.,
Email:kjs@mail.tongji.edu.cn
Department of Electrical ... on reactive power with BLDC for Electric
Vehicle Application.
Index Terms— BLDC motor; Electric vehicle; field-
weakening; reactive power;
I. INTRODUCTION
The electric vehicle(EV) is the cleanenergy ... Comparison of Three Different Motor Types for
Electric Vehicle Application. Proc. of the 12th International Electric
440
Fig. 2. Chart of field-weakening vector control of BLDC motor.
The instantaneous...
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Electric motors and drives technical manual 2010 edition
Ngày tải lên :
12/01/2014, 10:43
... caused.
The motor need not be hermetically sealed; gas may therefore penetrate
the motor. The permitted temperature inside the motor is limited only by
the insulation class of the motor.
The rated ... on how hot the oute
r surface of the motor is
permitted to be with regard to the relevant temperature class. Slip
-
ring
motors, commutator motors and brake motors
can all be made in
flameproof ... the motor will have a small diameter
shaft (“U” dimension) and the bearing in t
he drive shaft end of the motor
will be somewhat smaller than the equivalent long shaft motor. Short
shaft motors...
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Electric Machines and Drives Part 1 pot
Ngày tải lên :
21/06/2014, 01:20
... brake where motor cannot be used separately
ã Submersible motors
ã Single Phase motors
ã DC motors
ã Two-digit frames (48-56)
ã Multi-speed
ã Medium voltage motors
ã Repaired motors
ã TENV ... of the rotating electric machine. Electric drives have quickly
become an integral part of our everyday lives and we can hardly imagine our civiliza-
tion without them. Electric drives play a vital ... accessories
Some Motor configurations are not covered by IEC 60034-30. These are:
ã Motors with reinforced isolation specifically designed for variable speed drives
applications
ã Motors which...
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Electric Machines and Drives Part 2 docx
Ngày tải lên :
21/06/2014, 01:20
... 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 impact ... International motor efficiency classification
6. Life cycle cost Premium motors
An electric motor is somewhat cheap to buy, but expensive to run. For example, a 3 hp
Premium efficiency motor functioning ... of the electricity will represent 97 % of the cost of useful life cycle of the
electric motor, while for the car motor, it represents only 10 %. Moreover, the car’s internal
combustion motors...
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Electric Machines and Drives part 6 ppt
Ngày tải lên :
21/06/2014, 01:20
... compensation is proposed, as follows
100
Electric Machines and Drives
Electric Machines and Drives
90
incorporated into a vector controlled induction motor drive. The block diagram of the ... Load 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 ...
Abbondante, A. & Brennen, M. B. (1975). Variable speed induction motor drives use
electronic slip calculator based on motor voltages and currents. IEEE Trans. Ind.
Appl, Vol. 1A-11, No....
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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 ... McGraw-Hill.
Leonhard, W. (1996). Control of Electrical Drives, Springer-Verlag.
Marino, R., Peresada, S. & Valigi, P. (1990). Adaptive partial feedback linearization of
induction motors, Proceedings of the ... Speed-Sensorless Induction Motor Control with Torque Compensation
4. Zero dynamics
For the IM speed control, we are interested in the internal behaviour of the system when the
motor torque τ
M
is constant....
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Electric Machines and Drives part 8 pdf
Ngày tải lên :
21/06/2014, 01:20
... PI-(a) Regulated Motor speed and its reference. (b)Generator speed. (c) DFIG & IM
rotor position. (d) Generator torque (e) Motor desired torque.
138
Electric Machines and Drives
The flux linkage ... PBC+PI-(a) Regulated Motor speed and its reference. (b)Generator speed. (c) DFIG &
IM rotor position. (d)Generator torque (e) Motor desired torque.
136
Electric Machines and Drives
241.35 241.4 ... knowledge of electrical
motor parameters to achieve good performance.
A good deal of research has been carried out in the last several years on parameter estimation
of induction motors, mainly...
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