state three methods of dc motor speed control
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Tài liệu Speed Control of DC Manchines pptx
Ngày tải lên :
17/12/2013, 14:15
...
B
r
e
r
v
r
B
r
I
r
F
r
B
r
v
r
e
r
B
r
I
r
F
r
Đặc tính cơ của động cơ DC kích từ nối tiếp
Example 4:
Example 5:
Đặc tính cơ
4 phần tư...
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Direct torque and indirect flux control of brushless DC motor with non sinusoidal back EMF without position sensor
Ngày tải lên :
03/01/2014, 19:45
...
effectiveness of the sensorless three- phase conduction
DTC of a BLDC motor drive with six-switch inverter.
2. The Proposed Sensorless DTC of Four-Switch
BLDC Motor Drive Using Three- Phase Conduction ... proposed three- phase
conduction DTC of BLDC motor drive with six-switch inverter
scheme.
Keywords: Brushless dc (BLDC) motor, sliding mode
observer, direct torque control (DTC), stator flux control, ... successfully demonstrated application
of the proposed three- phase conduction direct torque
control (DTC) scheme for BLDC motor drives. It is
shown that the BLDC motor could also operate in the
field-weakening...
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Direct torque and indirect flux control of brushless DC motor
Ngày tải lên :
03/01/2014, 19:46
... AND
P
ARAMETERS OF THE
BLDC M
OTOR
A
PPENDIX
II
OZTURK AND TOLIYAT: DIRECT TORQUE AND INDIRECT FLUX CONTROL OF BRUSHLESS DC MOTOR 357
Fig. 7. Steady state and transient behavior of the experimental. ... applications of the proposed
sensorless three- phase conduction DTC of BLDC motor drive
scheme are verified through simulations and experimental results.
Index Terms—Brushless dc (BLDC) motor, direct ... INDIRECT FLUX CONTROL OF BRUSHLESS DC MOTOR 355
TAB L E I
S
WITCHING
T
ABLE FOR
DTC
OF
BLDC M
OTOR
U
SING
T
HREE
-
PHASE
C
ONDUCTION
indirectly kept at its optimum level, while the motor speed is
less...
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Direct torque control of four switch brushless DC motor with non sinusoidal back EMF
Ngày tải lên :
03/01/2014, 19:46
... only the torque is controlled without speed control,
the time range of control system under transient state is
selected short. The motor speeds up to a very large value
if the motor is run longer ... effectiveness of the two-phase
four-switch DTC of a BLDC motor drive in the constant
torque region.
II. T
HE
P
ROPOSED FOUR
-
SWITCH
D
IRECT
T
ORQUE
C
ONTROL OF
BLDC M
OTOR
D
RIVE
A. Principles of ... regulation
are showed in Fig. 4 for four-switch DTC of BLDC motor
drive. The overall block diagram of the closed-loop four-
switch DTC scheme of a BLDC motor drive in the
constant torque region 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
...
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 10
...
such as high torque, speed controllability over a wide range, portability, well-behaved speed-
torque characteristics, and adaptability to various types of control methods. DC motors are
classified ... Furthermore, the control of AC actuators was a difficult task at that time.
Today, AC motors are also widely used as servo-motors, employing modern methods of phase-
voltage control and frequency control...
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Lesson 20-Three Stages of Main Engine Control
Ngày tải lên :
28/10/2013, 08:15
... development of the shipbuilding industry all the way.
One of the examples of ship's automation is the three stages of main engine
control, which denote hand control, central control and bridge control ... into the details of the three- stage M. E. control one by one.
1. Hand Control
By the hand control, the function of the remote control maneuvering console is
the same as that of an ordinary electrictelegraph. ... central control is to be realized from the centralized control room, whereas
the bridge control may be termed as remote control and executed in the wheelhouse. The
mentioned three stages of M.E. control...
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Tài liệu Steady State Operation of DC Machines pptx
Ngày tải lên :
17/12/2013, 14:15
... Illustration of various types of load torques.
2. SEPARATELY EXCITED DC MOTOR
Excitation winding and armature winding of a separately excited DC motor are
supplied from two independent DC power sources. ... enables
examination of available speed control methods for a separately excited DC motor, that are
beyond the scope here. As can be seen from the speed torque characteristic, speed slightly
decreases, ... excitation current) and to the speed of rotation,
through a constant determined with constructional features of the machine. Speed of rotation ω
is the so-called angular speed of rotation in [rad/s]...
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Pseudo vector control – an alternative approach for brushless DC motor drives
Ngày tải lên :
03/01/2014, 19:46
... main concern of the BLDCM because
it limits this kind of motor from many applications. There are
three main sources of torque production (and therefore of the
torque ripple) in BLDCMs: cogging ... ripple in
Square-wave PM Motors (BLDC motor) . Instead of
conventional square-wave form, the method uses the principle of
vector control to optimally design the wave-form of reference
current ... the same as of the
conventional control system for BLDC motor (Fig. 2). The
motor is fed by a PWM-controlled MOSFET inverter. As we
can see in Figs. 2 and 3, the currents are controlled by...
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Tài liệu 3 Parameter Setting of Analog Speed Controllers pdf
Ngày tải lên :
27/01/2014, 15:20
... Parameter Setting of Analog Speed Controllers
3.1.2 Current controllers
In most traditional DC drives, the driving torque
T
em
is controlled by means
of a minor (local) current control loop. ... designing the structure of the speed controller and setting
the control parameters. In this chapter, an insight is given into traditional DC-
drives with analog speed controllers, along with ... complexity of the open-loop and
closed-loop transfer functions. Each of the transfer functions
W
P
,
W
SC
,
W
M
,
–
,
, ,
,
3.2 The impact of secondary dynamics
on speed- controlled DC drives...
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Tài liệu State of Tennessee Comprehensive Cancer Control Plan 2009-2012 ppt
Ngày tải lên :
14/02/2014, 22:20
... management of
treatment side effects with state of the art therapies throughout the continuum of
cancer care.
Goal: Ensure that citizens of the State of Tennessee (including diverse populations) ... caregiver, and health care professional awareness of
palliation quality of life issues and options; and increase access to and utilization of
palliation and pain control techniques.
Objective ... Cancer Control Plan for 2009-2012 is a collaboration of
professionals in healthcare, social work, higher education, government,
non-profit agencies and citizens who have first-hand knowledge of...
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Brushless DC Motor Control Made Easy potx
Ngày tải lên :
30/03/2014, 07:20
... Phase2, Set ADC GO, RA3->ADC
sOffsetRead equ sOffsetSetup+1 ; Wait for ADC nDONE, Read ADC->ADCOffset
sVSetup equ sOffsetRead+1 ; Wait for Phase4, Drive On, wait 9 uSec, Set ADC GO
sVIdle ... No
Is
PWMThreshold
>0xFD?
Set
FullOnFlag
Clear
FullOnFlag
State = VSetup
Clear SpeedStatus
Set ADC input
to PWM Pot
State = RPMSetup
Is
motor drive
active
?
Wait for ADC
acquisition time
Start ADC
State = VRead
SM4 SM5 SM3
State =
VRead
?
Yes
No
No
Yes
No
Yes
No
Yes
Is ... Setup ADC (bank1)
movlw B’00001110’ ; ADC left justified, AN0 only
movwf ADCON1
banksel ADCON0
; setup ADC (bank0)
movlw B’11000001’ ; ADC clock from int RC, AN0, ADC on
movwf ADCON0
bsf ADCON0,GO...
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DC motor control for robot
Ngày tải lên :
22/05/2014, 18:05
... volume control
Electric drill speed control
Reasons for accurate speed control
Motor speed should
be independent of
load.
Differential drive
platforms need to
synchronize wheel
speed ... is the response of the PID system
tested and measured?
How is the response of the PID system
optimized?
How are the coefficients for P, I, and D
determined?
DC MOTOR CONTROL SYSTEMS
FOR ... control system
GAIN
INPUT
PLANTSUM
FEEDBACK
OUTPUT = (INPUT – OUTPUT) X GAIN
PID tuning (BLACK MAGIC METHODS)
Mathematical methods
Mathematical representation of the plant
Root locus methods
...
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báo cáo hóa học: " Clinical assessment of the physical activity pattern of chronic fatigue syndrome patients: a validation of three methods" pptx
Ngày tải lên :
18/06/2014, 19:20
... the validity of the API (0.643) was
somewhat smaller than that of the two questionnaires
(0.710 and 0.711). Following the method of Hanley and
Mc Neil [22], the validity of the three instruments ... practice? Which of the
three instruments could best be used if no actometers are
available? Although the validity of the three instruments
appeared to be fair, and hence in fact none of the instru-
ments ... patient of phys-
ical activity. Another option could be to include the opin-
ion of a direct partner of the patients in the reporting of
daily activities.
Conclusion
To conclude, the results of this...
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Báo cáo hóa học: " Oromotor variability in children with mild spastic cerebral palsy: a kinematic study of speech motor control" docx
Ngày tải lên :
19/06/2014, 08:20
... understanding of the mechanism
underlying speech motor control. However, there is a lack of literature in quantitative measures of motor control,
which may potentially characterize the nature of the ... study of speech
motor control in children with CP. The lack of this type
of research on CP children may be due to the technical
difficulty of managing movement artifacts due to head
or trunk control ... conduct speech motor control ana-
lysis in children with CP for several reasons. First, quan-
titative measures of motor control are considerably
more sensitive than conventional methods in determin-
ing...
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