...
versus speed characteristics. Two control loops: inner feed
forward current control loop and outer voltage control
closed loop are applied for the non-inverting buck-boost
converter. The performance ...
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 ...
configuration in MATLAB/Simulink
đ
were performed.
The non-inverting buck-boost converter is controlled in
boost mode, which is suitable forvariablespeed wind
turbine operation. The input...
... modes of buck boost converter
2
Unlike constant -speed control, a variable- speedcontrol 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. ...
... 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 ... BLDC motor drive using four -switch inverter with
faster torque response due to the fact that the voltage space
vectors are directly controlled. Therefore, the direct torque
controlled four -switch ... AND V FOR FOUR
-
SWITCH DTC OF BLDC MOTOR DRIVE
(CCW)
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
Figure 3. Proposed four -switch voltage vector topology for two-
phase conduction DTC of BLDC motor...
... outputs is essential for feedback control, and is also useful for
performance evaluation of a process. Input measurements are needed in feedforward control. It
is evident, therefore, that the measurement ... angular
speed
ω
c
.
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop SpeedControl System 12
7. Control Design
The objective of the exercise is to control the angular speed of ... systems.
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop SpeedControl System 17
Mechatronics Kevin Craig
DC Motor / Tachometer Closed-Loop SpeedControl System 29
9. Testing of...
...
protection for final circuits supplying sockets.
v LV/LV transformer: Ecodial accepts all primary voltages and gives more information into the
calculation result like Transformer R phase, Transformer ... a New Electric World
Fupact and
variable speed
drive integrated
For further details concerning
Ecodial V3.38, ask your Schneider Electric
representative for a free demonstration.
11 / 2006
Schneider ... necessary general
information:
b one window to enter project data (project name,
customer name, etc.)
b another for the general electrical installation
characteristics used for the calculations...
... mentioned facts were motivation for mathemat-
ical model formulation and for further research of both the
phase angle control and switch mode control behavior for the
electromagnetic vibratory ... mathematical model for the VCS with electromagnetic
drive and power converter control circuits for its optimal control
DESPOTOVIC
´
AND STOJILJKOVIC
´
: POWER CONVERTER CONTROL CIRCUITS FOR TWO-MASS ... of
power converters for electromagnetic vibratory drive.
V. S
IMULATION
R
ESULTS
In this section, simulation results for cases of phase angle
control and switch- mode current control are presented....
... previously described current control techniques for
the active filter. The controllers include the implementation
of all the aforementioned refinements, so that the achieved
performance is, as realistically ... reduced
by sampling the control variables and executing the control
routines twice in a modulation period. The turn-on and turn-
off times of the power converter switches are, therefore,
decided separately ... the achievable performance on the slope of the current
reference.
The improvements in the control techniques result in rather
satisfactory performance levels for all three controllers. How-
ever,...
... FL controller, (b) control surface of con-
ventional PI controller, (c) control surface of FL controller; comparison of
current-tracking performance with PI and FL controller: (d) current waveform,
and ... Therefore,
feedforward signals for the reference
and disturbance
inputs are added to the feedback control law.
Because the control algorithm guarantees the dynamically
correct compensation for ... predictive controller is often called a deadbeat con-
troller [85], [94], [95], [97]. Among the additional information
given to the controller, nonavailable state variables (e.g., flux
and speed) ...