... 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 ... well-behaved speed-
torque characteristics, and adaptability to various types of control methods. DC motors are
classified as either integral-horsepower motors (≥ 1 hp) or fractional-horsepower motors ... power amplifier. Motorspeed is measured using
an analog tachometer.
Figure 2. Physical System
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop SpeedControl System 5
Most...
...
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...
... chúng em đã chọn đề tài nghiên cứu : “Bộ điều
khiển số PID điều khiển DC motor .
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
)
...
...
3.1. The basic control format
In essence, we are endeavoring to design a controller that can vary the torque induced in
the rotor of the motor. To do this, the induction motor controller will ... for an induction
motor
An induction motor is an asynchronous AC (alternating current) motor. The least
expensive and most widely used induction motor is the squirrel cage motor. The major ... 6.10. The speed response of the control system where the proportional gain of the speed
controller is increased
As you can see, the transient response is faster as it follows the speed command...
... B
PID
Control
PID
Control
Figure 17 Two PID controllers that share one valve.
Suppose the output of a controller is broken by a selector, with the output of
another controller taking control ... commercial controllers allow the user to specify Proportional only
controllers, proportional-reset (PI) controllers, and PID controllers that have all
three modes. The majority of loops employ PI controllers. ... transmitted to the final control element.
• A final control element
. A valve, air flow damper, motorspeed controller, or
other device receives a signal from the controller and manipulates...
... Inc.
BACK EMF CONTROL METHOD
The back electro-magnetic-force (EMF) or sensorless
motor control method obtains the speed and position of
the motor directly from the voltage at the motor
windings. ... stable, reliable and cost-effective
control system.
Further details on motorcontrol circuits and sensors
are provided in several books, including Motor Control
Electronics” (10). In addition, ... Parekh, Rakesh, “AN889 - VF Control of 3-
Phase Induction Motors using PIC16F7X7
Microcontrollers”, Microchip Technology Inc.,
2003.
10. Valentine, Richard, editor, MotorControl Elec-
tronics Handbook”,...
... Operation modes of buck boost converter
2
Unlike constant -speed control, a variable -speed control can
adjust the speed of the turbine as the wind speed changes, so
as to operate at the peak of the ... proposed MPPT control method.
Fig.7: Wind turbine output power without MPPT control method
for low wind speed.
Fig.8: Wind turbine output power with MPPT control method
for low wind speed. ... low wind
speeds.
Fig.9 : Wind turbine output power without MPPT control method
for high wind speed.
Fig.10 : Wind turbine output power with MPPT control method
for high wind speed. ...
...
converter
LOAD
P electSpeed Duty ratio
VSWT Aero dynamical / Mechanical unit
MPPT
LPPT
Operator
Controller
speed
d
Control
strategy
VSWT Control unit
VSWT Electrical unit
Fig. 1. Control concept ... power in above rated
wind speeds. This control acts directly upon an additional
hydraulic system and is very important to protect the
blades from breaking.
The speedcontrol algorithm serves ... two optimum wind turbines power/torque
versus speed characteristics. Two control loops: inner feed
forward current control loop and outer voltage control
closed loop are applied for the non-inverting...