circuit schematic diagram three phase ac motor speed control
Design and Implementation of a Three-Phase Induction Motor Control Scheme
Ngày tải lên :
27/10/2013, 23:15
... detect the 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 ... battery packs,
12V
DC
to 140V
DC
. ~40 V
DC
is the most compatible voltage supply for the motor
controller that will be used for this thesis.
ã Induction motor. Three- phase, 0.5kW, 4-pole machine. ... nominal speed. However, outside the rated
speed operation, the flux has to be decreased like an inverse function of speed. By
weakening the rotor flux, the induction machine can reach speeds...
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IEC 60909 3 short circuit currents in three phase a c systems currents during two separate sim
Ngày tải lên :
04/04/2014, 11:58
... COMMISSION
___________
SHORT -CIRCUIT CURRENTS IN THREE- PHASE AC SYSTEMS –
Part 3: Currents during two separate simultaneous
line-to-earth short circuits and partial short -circuit currents
flowing ... short circuits 19
5.1 Calculation method 19
5.1.1 Initial symmetrical short -circuit current 19
5.1.2 Peak short -circuit current, symmetrical short -circuit breaking current
and steady-state short -circuit ... travers la terre
Short -circuit currents in three- phase
a.c. systems –
Part 3:
Currents during two separate simultaneous
line-to-earth short circuits and partial short-
circuit currents flowing...
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Current control techniques for three phase voltage source PWM converters a survey
Ngày tải lên :
03/01/2014, 19:45
... Block scheme of FL controller, (b) control surface of con-
ventional PI controller, (c) control surface of FL controller; comparison of
current-tracking performance with PI and FL controller: (d) ... speed AC drives,” in Conf. Rec.
IEEE-IAS Annu. Meeting, Denver, CO, 1986, pp. 235–243.
[25] P. Feller, Speed control of an ac motor by state variables feedback with
decoupling,” in Proc. IFAC ... because even small phase or amplitude errors
cause incorrect system operation (e.g., vector-controlled ac
motors). In such cases, the control schemes based on the
space-vector approach are applied....
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Tài liệu ime Control of a Three Phase 4 Wire PWM Inverter with Variable DC Link Voltage and Battery Storage for PV Application doc
Ngày tải lên :
19/01/2014, 02:20
... con
t
a
se inverter
s
d to mach f
o
c
ontains the
link voltage
nk control i
s
T
he control o
discrete sy
s
Figur
e
t
rol strategy
s
in [1], [2],
o
r three pha
s
current mi
n
control loo
p
s
intended ... propose
C
link capaci
t
t
ween the n
e
p
ut voltage.
T
t
rol is imple
m
e
DC link v
o
i
s achieved
a
I
nverter) is
e
r
aw back is t
h
4 wire PW
M
c
t-current, it
t
o ac power.
output pow
a
tion, ... UN
I
TECHN
O
m
ent of Ele
c
and De
r
s
tract
e
PWM inv
e
e
phase load
o
rage (BES)
a
battery ene
r
w
ith a LC ou
t
be always c
r
ature are o
c
t
tery energy
r
voltage. T
h
ace equatio
n
a
lgorithm is...
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Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt
Ngày tải lên :
25/01/2014, 13:20
... 1.0 A
A schematic diagram of a DC motor is shown in Figure 6.
Figure 6. Schematic Diagram of a DC Motor
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop Speed Control System ... root-locus domain.
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop Speed Control System 24
Mechatronics
DC Motor / Tachometer Closed-Loop Speed Control
System
1. Introduction
This ... Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop Speed Control System 21
Table 1. Specifications of the Honeywell 22VM51-020-5 DC Motor with Tachometer
Motor Characteristics Units Values...
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Chapter 12 fully controlled three phase bridge converters
Ngày tải lên :
16/02/2014, 18:53
... to achieve either a three- phase controllable voltage source
or a three- phase controllable current source, as was assumed to exist in previous
chapters.
12.2. THE THREE- PHASE BRIDGE CONVERTER ... permanent-magnet ac machines, we set
forth control strategies that assumed the machine was driven by a three- phase, variable-
frequency voltage or current source without mention of how such a source is actually ...
the three- phase bridge were set forth with no discussion as to how the bridge would
enable operation of a three- phase ac machine from a dc supply. In this section, a basic
method of accomplishing...
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Chapter 14 permanent magnet AC motor drives
Ngày tải lên :
16/02/2014, 18:54
... or nonsinusoidal back emf waveforms.
Machines with sinusoidal back emfs may be controlled so as to achieve nearly con-
stant torque; however, machines with a nonsinusoidal back emf may be less ... nominal operating speed of 200 rad/s (mechanical).
542 PERMANENT-MAGNET AC MOTOR DRIVES
The structure of the control algorithms determines the type of permanent-magnet
ac motor drive, of which ... structure of the controls
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
...
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Conventional Three-Phase Fixed-Bed Technologies: Analysis and Critique docx
Ngày tải lên :
16/03/2014, 22:20
... features Slurry reactor Fixed-bed
reactors
1 Reaction performance
1.1 Overall reaction rate related to the catalyst
mass
High Low
1.2 Overall reaction rate related to the reactor
volume (or volume ... compound in
liquid
Subscripts
A Liquid reactant
B Gaseous reactant
cat Catalyst
g Gas phase
xiv List of Symbols
Chapter 1
Introduction
Three- phase fixed-bed reactors are very often encountered in ... multiphase processes: Trickle-Bed Reactors (TBRs), Bubble
(packed) Column Reactors (BCRs), and MultiTubular Reactors (MTRs).
Some typical reactions realized in these reactors are exemplified in Table...
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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
...
increasing volume fraction of glass particle phase, three- phase composite is more heatproof than itself
when increasing volume fraction of glass fibre phase. This is meaningful in manufacturing materials ... fraction of the particle phase
we increase, the more thermal expansion coefficients of three- phase composite material reduce.
4. Conclusions
Based on the idea solving the problem of three- phase ... letting volume fraction of the particle phase be constant and increasing step by step
volume fraction of the fibre phase will reduce thermal expansion coefficients of three- phase composite
material....
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Báo cáo " Three-phase polyme nanocomposite material " doc
Ngày tải lên :
28/03/2014, 13:20
...
material according to the constants of components of the initial three- phase
material, we only replace elastic modules of the supposed matrix material (8) into
formula (10).
Three- phase polyme ... mechanic of three- phases nano composite in which two-phases is grains of
pad and the structure of one -phase in reinforced two-phases is a nano structure,
basing on consideration for interaction ... the three- phase composite in this paper, therefore, include:
polyme matrix, reinforced pad seeds and nano seeds (Fig 1)
Fig 1. Model of the three- phase composite
We approach...
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Three phase a c circuits
Ngày tải lên :
03/04/2014, 20:52
... of a three- phase machine is utilised.
A single phase alternator utilises only tw
o thirds of the stator
slots.
2 A three- phase alternator has a better distribution factor.
3 A three- phase, ... that from a single -phase
machine.
6 A three- phase supply produces a rotating magnetic fi eld;
whereas
a single -phase supply produces only a pulsating fi eld.
7 Three- phase motors are inherently ... inherently self-starting; whereas single -phase
motors are not.
8 The torque produced by a three- phase motor is smooth; whereas
that produced by a single -phase motor is pulsating.
CH003-H8747.indd...
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