555 dc motor speed control circuit
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 ... 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 ... Craig
DC Motor / Tachometer Closed-Loop Speed Control System 11
The DC motor/ tachometer system has a single input and a single output. The input is the voltage
applied across the two motor...
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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
...
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 ... 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 ... 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
... 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 ... programming-based control of brushless motors,”
IEEE Trans. Control Syst. Technol., vol. 11, no. 1, pp. 139–146, Jan. 2003.
[19] S. J. Kang and S. K. Sul, “Direct torque control of brushless dc motor with
nonideal...
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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 ... 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 ...
I. I
NTRODUCTION
Brushless dc motors have been used in variable speed
drives for many years due to their high efficiency, high
power factor, high torque, simple control, and lower
maintenance...
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Pseudo vector control – an alternative approach for brushless DC motor drives
Ngày tải lên :
03/01/2014, 19:46
... 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 ...
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 ... 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
... 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 ...
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 ... 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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Bộ điều khiển số PID điều khiển DC motor
Ngày tải lên :
23/04/2013, 14:48
... CAP-P7
1000
7805
IN
1
OUT
3
G
N
D
2
U4
7805
GND
CAP-P6
10U
CAP4
104
VCC
R6
330R
LED1
LED
T1
TIP42
R5
10R
2
1
3
4
P
O
W
E
R
1
CONN-SIL4
Control 1
Control 2
Hình 4.6 Sơ đồ nguyên lý mạch nguồn 5V
Khối này là mạch điện dùng để ổn áp điện thế ... 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
... 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 ... 12/2002
DC Motor - Practical1
VI MẠCH 555/ 556
Tạo ra các xung đều nhau, tần số
CRR
f
BA
)(
49.1
+
=
Tạo ra xung có bề rộng ΔT khi có
xung vào chân trigger
ΔT=1.1RC
By Lê Anh Tuấn 12/2002
DC Motor ... 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...
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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
... electric motor types (i.e., brushless DC,
AC induction), BDC motors do not require a controller
to switch current in the motor windings. Instead, the
commutation of the windings of a BDC motor is ... 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...
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Power converter control circuits for two mass vibratory conveying system with electromagnetic drive simulations and experimental results IEEE trans
Ngày tải lên :
03/01/2014, 19:16
... with electromagnetic
drive and power converter control circuits for its optimal control
DESPOTOVIC
´
AND STOJILJKOVIC
´
: POWER CONVERTER CONTROL CIRCUITS FOR TWO-MASS VCS 459
Fig. 11. Amplitude ... and transient regimes with varying conveying
mass
is described.
A. Phase Control
Simulation circuit with phase angle control of the EVA coil
is given in Fig. 8. The load mass, which is oscillating, ... power factor correction (PFC), while the
other one is a dc/ dc (pulsating current) converter for driving
EVA. The input converter is in fact a controllable transistor rec-
tifier with two “boost” stages...
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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 ... 2
.
21370
.
2007
.
1
3
Speed Control
TM
ô
SPC Gas Springs,
2486.12. cushioned
subject to alterations
Force in daN at Piston...
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