electric motor drives krishnan pdf
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]:
• 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
Ngày tải lên :
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 ... Figure 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
• 1891 – Ward-Leonard dc motor speed control is introduced
• 1897 – Development of ... 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
Introduction...
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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 Vehicle Technology Explained pdf
Ngày tải lên :
18/03/2014, 02:20
... clear
I
m
Motor current
J Polar second moment of area
k
c
Copper losses coefficient for an electric motor
k
i
Iron losses coefficient for an electric motor
k
w
Windage losses coefficient for an electric motor
KE ... gravitational force of a vehicle down a hill
P
mot-in
Electrical power supplied to an electric motor
P
mot-out
Mechanical power given out by an electrical motor
P
rr
Power needed to overcome the rolling ... Figure 1.5.
The vehicle consists of an electric battery for energy storage, an electric motor, and a
controller. The battery is normally recharged from mains electricity via a plug and a
battery...
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Ứng dụng ic lập trình AT89C51: Dùng bàn phím điều khiển motor, relay, đèn... pdf
Ngày tải lên :
18/03/2014, 18:20
... Chân số 3 và số 9 mắc tụ lọc và
chân số 2 và chân số 10 cấp điện cho motor. Ngang motor gắn một tụ lọc nhiễu ồn phát
ra từ motor. Tín hiệu điều khiển đưa vào trên chân 5 và chân 6. Bản logic ... 3 chân 4, 5, 6 của ic lập trình để điều khiển các trạng thái quay của
motor 2. Tìm hiểu nguyên lý làm việc của motor DC .Motor DC gồm có:* Phần tĩnh là một
nam châm vĩnh cữu, đặt cố định, một ... ở mức thấp và chân 10 ở mức áp cao: Motor
quay ngược.* Khi chân 5 Fin và chân 6 Rin đều ở mức áp cao, thì mức áp ngả ra trên
chân 2, 10 đều ở mức áp thấp: Motor không quay. Phân tích trên cho...
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Cambridge.University.Press.Upper.Motor.Neurone.Syndrome.and.Spasticity.Clinical.Management.and.Neurophysiology.Jun.2008.pdf
Ngày tải lên :
21/09/2012, 11:02
... areas.
Those controlling motor function within the spinal
cord arise from the precentral frontal cortex, the
majority from the primary motor cortex (Brodmann
area 4, 40%) and premotor cortex (area ... upper motor
neurones
Spasticity and the other features, positive and neg-
ative, of the UMN syndrome (as listed in Table 1.1)
arise from disruption of certain descending path-
ways involved in motor ... years of
this century to discover the critical cortical areas and
motor tracts. These experiments involved making
lesions or electrically stimulating areas of the cen-
tral nervous system (CNS)...
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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
... 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 ... Brushless Direct Current (BLDC) motor with the
high power density and the high efficiency characteristic is been
used to Electric Vehicle. The mathematical model of BLDC
motor under rotor flux linkage...
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