... schematic diagram of a DCmotor is shown in Figure 6.
Figure 6. Schematic Diagram of a DCMotor
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop SpeedControl System 10
• ... root-locus domain.
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop SpeedControl System 24
Mechatronics
DC Motor / Tachometer Closed-Loop SpeedControl
System
1. Introduction
This ... Craig
DC Motor / Tachometer Closed-Loop SpeedControl 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...
... chúng em đã chọn đề tài nghiên cứu : “Bộ điều
khiển số PID điều khiển DCmotor .
Đồ án của chúng em điều khiển động cơ một chiều bằng PID viết trên nền vi điều
khiển, giao tiếp với máy tính ... tích phân (bộ PID)
Bộ điều chỉnh PID lý tưởng là cấu trúc ghép song song của ba khâu: P, I và D.
Hình 2.8 Sơ đồ khối của bộ điều chỉnh tỉ lệ - vi tích phân
Phương trình vi phân của bộ PID lý tưởng:
... thường được sử dụng là hiệu chỉnh nối tiếp với bộ điều khiển PID số.
Ta có sơ đồ điều khiển với bộ PID số:
Xuất phát từ mô tả toán học của bộ PID liên tục ở trên ta có:
u
(
t
)
=u
p
(
t
)
+u
D
(
t
)
+u
I
(
t
)
...
...
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...
... 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 DCMOTOR 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 motorspeed 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 dcmotor with
nonideal...
... 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...
... motor that is fed by square-wave
current and it is often called Brushless DCMotor
(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...
... 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 speedcontrol 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 speedcontrol 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...
... 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 - 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 ... 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...
... drawback to SWDC motors is that they do not
have precise speedcontrol 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...
...
Overview of Gas Springs
2
.
21369
.
2007
.
1
Speed Control
TM
«
SPC Gas Springs,
cushioned 2486.12.
FIBRO SPC Gas Springs Speed Control
TM
« 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
«
SPC Gas Springs,
2486.12. cushioned
subject to alterations
Force in daN at Piston...
... 18
Contents
9715E Issue 2 DC Motors
2
Page
Introduction
DC motor range 3
DC motor selection
MKlll range 4
Which DC motor? 4
Standards and Environment
Enclosure 5
Insulation 5
Thermal Rating 5
Motor Cooling ... 13
9715E Issue 2 DC Motors
12
MKlll Range
General
The MKIII range of dc metric motors
provides exceptionally high outputs per
unit weight combined with complete
flexibility of speed control. MKIII ... see page 24
9715E 8/4/05 2:42 pm Page 25
9715E Issue 2 DC Motors
13
Brushwear derection system for MKlll DC motors
All the benefits of DC drives
with low maintenance
The Bull Electric Brushwear...