synchronous motor speed control methods
Tài liệu Mechatronics DC Motor / Tachometer Closed-Loop Speed Control System ppt
Ngày tải lên :
25/01/2014, 13:20
... 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 ... 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 ... power amplifier. Motor speed is measured using
an analog tachometer.
Figure 2. Physical System
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop Speed Control System 5
Most...
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Direct control methods for matrix converter and induction motor
Ngày tải lên :
13/05/2014, 00:55
... basics of Direct Torque Control, Direct Current Control
and Sliding Mode Control of matrix converters.
I. INTRODUCTION
In recent years many research results on control
methods for matrix converters ... closed loop
control of a drive system consisting of matrix converter
and induction machine. Slip control and field oriented
control are the basic methods applied for closed loop
control [4]. ... section III the basic ideas of the
three control methods mentioned above will be outlined,
starting with Direct Torque Control and Sliding Mode
Control, as these methods use the same switch
configurations...
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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
«
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...
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báo cáo hóa học:" Scan speed control for tapping mode SPM" docx
Ngày tải lên :
21/06/2014, 17:20
... the step height equal to
25 nm. At a constant speed of 30 µm/s (a), with a dynamic control (b), and with a
dynamic control and at a variable speed (c).
Figure 2. Comparative line traces for ... K
τ
. As a result, the speed of a closed-loop control system (that is,
without loss of surface) is determined by the time constant
0 0
i
G K
τ
. Feedback speed,
the speed of the actuator, ... dynamic controller on ‘parachuting’ regions. Furthermore,
we propose to use variable scan speed on ‘upward step’ regions, with the speed
determined by the error signal of the closed-loop control. ...
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Design and Implementation of a Three-Phase Induction Motor Control Scheme
Ngày tải lên :
27/10/2013, 23:15
... 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 ...
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 ... 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...
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Motor control sensor feedback circuits
Ngày tải lên :
03/01/2014, 18:55
... 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 motor control 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, Motor Control Elec-
tronics Handbook”,...
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DC bus control of variable speed wind turbine using a buck boost converter
Ngày tải lên :
03/01/2014, 19:15
... 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. ...
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New control strategy for variable speed wind turbine with DC DC converters
Ngày tải lên :
03/01/2014, 19:15
...
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 speed control 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...
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