dc motor speed control through pwm technique
Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt
Ngày tải lên :
25/01/2014, 13:20
... 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
ã ... angular
speed
ω
c
.
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop Speed Control System 12
7. Control Design
The objective of the exercise is to control the angular speed of ... 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...
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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
... Block
Indirect torque control method of BLDC motor
explained in [9] was extended to a direct torque and
indirect flux control technique for six-switch inverter
BLDC motor in [7] which is suitable ...
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,
fast torque ... equation (6) eliminates the speed
term in the denominator which causes problem at zero
and near zero speeds.
2.3 Control of Stator Flux Linkage Amplitude
Since BLDC motor does not have sinusoidal...
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Direct torque and indirect flux control of brushless DC motor
Ngày tải lên :
03/01/2014, 19:46
... 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 torque con-
trol (DTC), fast ... force (EMF), position-sensorless
control, stator flux control, torque pulsation.
I. I
NTRODUCTION
T
HE permanent-magnet synchronous motor (PMSM) and
brushless dc (BLDC) motor drives are used extensively ... 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 ... bill.alexander@idealpowerconverters.com
Abstract—This paper presents a direct torque control (DTC)
technique for brushless dc (BLDC) motors with non-
sinusoidal back-EMF using four-switch inverter in the ... sampling time, dc- link voltage, hysteresis
bandwidth, motor parameters especially the winding
inductance, motor speed, snubber circuit, and the amount
of load torque The best way to control the...
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Pseudo vector control – an alternative approach for brushless DC motor drives
Ngày tải lên :
03/01/2014, 19:46
...
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 3
current controllers ... motor that is fed by square-wave
current and it is often called Brushless DC Motor
(BLDCM).
The main difference between two kinds of motors from
the control viewpoint resides on current control ... machine, Vector control,
Pseudo-vector control, Torque ripple minimization.
I. I
NTRODUCTION
A. Sine-wave PM Motor vs. Square-wave Motor: Vector Control
vs. Phase Current Control
With the...
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Brushless DC Motor Control Made Easy potx
Ngày tải lên :
30/03/2014, 07:20
...
reading
;**********************************************************************
;*
;* Main control loop
;*
Loop
call ReadADC ; get the speed control from the ADC
incfsz ADC,w ; if ADC is 0xFF we’re at full speed - skip timer add
goto PWM ; add Timer0 to ADC for PWM
movf ... 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 ... the speed control potentiometer
;* and start the next reading
;*
btfsc ADCON0,NOT_DONE ; is ADC ready?
return ; no - return
movf ADRESH,w ; get ADC result
bsf ADCON0,GO ; restart ADC
movwf ADC...
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Báo cáo y học: "Cancer control through principles of systems science, complexity, and chaos theory: A mode"
Ngày tải lên :
26/10/2012, 10:04
... therefore] the controller
must be able to control all n variables in order to avoid
the significant risk of leaving some subset of those
variables uncontrolled” [16].
The enormity of controlling ... variety that states that “…for effective control the
variety available to the controller should be the same
as the variety available to the system to be controlled”
[16]. The implications of ... it could choose the
path of stability through differentiation.
4. Implications for cancer control
Systems in chaos are amenable to stabilizing
change through a process of differentiation....
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Bộ điều khiển số PID điều khiển DC motor
Ngày tải lên :
23/04/2013, 14:48
... loại AVR tốc độ cao, tích
hợp sẵn ADC 10 bit.
- AVR tích hợp sẵn LCD driver : Atmega169, 329.
- AVR có tích hợp SC (power stage controller): AT9 0PWM thường dùng trong các
ứng dụng ... thay vì nhập xuất dữ liệu.
- Chân 30 : AVCC cấp điện áp so sánh cho bộ ADC.
- Chân 32 : AREF điện áp so sánh tín hiệu vào ADC.
- Chân 33 đến 40 : Cổng vào ra dữ liệu song song A ( PORTA ) ngoài ... tín hiệu số ADC ( analog to digital
converter)
b. Vào ra của vi điều khiển
PORTA ( PA7 … PA0 ) : là các chân số 33 đến 40. Là cổng vào ra song song 8 bít
khi không dùng ở chế độ ADC. Bên trong...
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DC Motor - Content
Ngày tải lên :
28/10/2013, 05:15
... cổng.
VD3: Sử dụng thanh ghi CC 80C537, có thể đạt 5kHz.
DC Motor - PWM illustration
By Lê Anh Tuấn 12/2002
DC Motor - Brushless DC
Động cơ một chiều không chổi than không được cấp liên tục ... 12/2002
DC Motor - Practical2
PWM SỬ DỤNG IC 555
Mạch dùng điều khiển động cơ 6V, 0.5 A với đầu vào Vin=9V
U1: tạo nhịp, chính là tần số làm việc
U2: Chu kỳ làm việc
By Lê Anh Tuấn 12/2002
DC Motor ... ứng dụng
By Lê Anh Tuấn 12/2002
DC Motor - Practical3
PWM BẰNG VI ĐIỀU KHIỂN
By Lê Anh Tuấn 12/2002
VD1: Sử dụng hai timer T0,T2 của AT89C52
T0: chu kỳ của xung PWM
T2: thời gian xung làm việc
VD2:...
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Tài liệu Brushed DC Motor Fundamentals doc
Ngày tải lên :
22/12/2013, 14:15
... drawback to SWDC motors is that they do not
have precise speed control like PMDC and SHWDC
motors have.
FIGURE 4: SERIES-WOUND DC
MOTORS
Armature
Brush
Permanent
Magnet Poles
DC
Voltage
Supply
Armature
Brush
Shunt
Field
DC
Voltage
Supply
Armature
Brush
Series
Field
DC
Voltage
Supply
... the
different types of BDC motors and the advantages/
disadvantages of each.
Permanent Magnet
Permanent Magnet Brushed DC (PMDC) motors are
the most common BDC motors found in the world.
These motors use ... generally more robust than PMDC motors.
FIGURE 3: SHUNT-WOUND DC
MOTORS
Series-Wound
Series-wound Brushed DC (SWDC) motors have the
field coil in series with the armature. These motors are
ideally suited...
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Tài liệu Corrosion control through organic coatings docx
Ngày tải lên :
25/12/2013, 23:17
... Schweitzer
Corrosion Control Through Organic Coatings, Amy Forsgren
7278_series 2/8/06 3:24 PM Page 2
â 2006 by Taylor & Francis Group, LLC
24
Corrosion Control Through Organic Coatings
...
16
Corrosion Control Through Organic Coatings
ã Transfers the free radical to another polymer, a solvent, or a chain transfer
agent, such as a low-molecular-weight mercaptan to control molecular
weight ... protection
to steel through multiple mechanisms:
ã Phosphate Ion Donation
Phosphate ion donation can be used for ferrous metals only [23,37,39,45, 52].
As water penetrates through the coating,...
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Tài liệu Speed Control SPC GAS SPRINGS, cushioned pptx
Ngày tải lên :
22/01/2014, 02:20
...
Overview of Gas Springs
2
.
21369
.
2007
.
1
Speed Control
TM
ô
SPC Gas Springs,
cushioned 2486.12.
FIBRO SPC Gas Springs Speed Control
TM
ô are designed to
reduce or eliminate the ... caused by the increased return travel speed
in high speed presses (link drive presses).
SPC Gas Springs feature an integral return travel delay which
reduces the speed of the gas spring to 0.4 m/s ... sheet metal
retainer.
Benefits of the Speed Control
TM
ô SPC Gas Springs,
cushioned:
Prevents bounce back of sheet metal retainer.
Increased productivity through more efficient transport
...
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