... mathematical model for the VCS with electromagnetic
drive and power converter controlcircuitsfor its optimal control
DESPOTOVIC
´
AND STOJILJKOVIC
´
: POWER CONVERTER CONTROLCIRCUITSFOR TWO-MASS ... VII.
power stage for driving EVA, synchronization circuit with zero-
cross detection, half-wave trigger pulse generator, pulse trans-
former for galvanic isolation controlcircuits from power ... various types 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...
... control system parameters.
Digital Control of Switching Power Supply
- Power Factor Correction Stage
Sangsun Kim and Dr. P. Enjeti
Power Electronics and Power Quality Laboratory
Department ... digital control of SMPS. The Power
Electronics & Power Quality Laboratory of Texas A&M University is currently exploring several
implementation aspects of digital control of power factor ... standard for the control of switch mode power supply (SMPS) systems has been
analog control. Now with the advent of high speed, lower cost digital signal processing (DSP) ICs,
digital control...
... the supply transformer. Practical
FIGURE 1.29
Various topologies of phase-controlled three-phase ac voltage controllers: (a) half-controlled, before-load,
(b) delta-connected, before-load, (c) ... voltage controller.
FIGURE 1.27
Waveform of the output voltage in a fully controlled three-phase ac voltage controller (resistive load, firing
angle of 30
).
1.3 AC TO AC CONVERTERS
19
CONTROL IN POWER
ELECTRONICS
Selected ... this angle. For example, for load and firing angles both of 30
, the load EMF
FIGURE 1.5
PWM control of output voltage in the generic power converter operating as an ac voltage controller: (a)
input...
... distortion for the input and output waveforms, and high power factor (PF) if the source
is ac voltage. Some special power supplies require controlled direction of power flow.
Basically two types of power ... required: dc power supplies and ac power supplies. The output of
dc power supplies is regulated or controllable dc, whereas the output for ac power supplies is ac. The input to
these power supplies ... elements in all
power conversion applications. The power devices are mainly used as switches to convert power from one form
to another. They are used in motor control systems, uninterrupted power supplies,...
... 240 degrees for the fifth sextant and α - 300 degrees for the sixth sextant.
Example:
A three phase induction machine is fed from PWM VSI controlled using voltage space
ENGNG3070 PowerElectronics ... W.Leonhard; Control of electric drives, 2nd Edition, Berlin: Springer-Verlag, 1996.
[2] J.M.D.Murphy, F.G.Turnbull; Power electronic control of AC motors, Oxford: Pergamon Press, 1988.
[3] B.K.Bose; Power ... VSI and a PWM VSI. A six-step VSI is therefore analysed. Power
circuit of the VSI and associated voltage wave-forms, valid for six-step operation, are for
convenience shown again in Figs. 6.17...
... example
18.2. Controller schemes
18.2.1. Average current control
18.2.2. Feedforward
18.2.3. Current programmed control
18.2.4. Hysteretic control
18.2.5. Nonlinear carrier control
18.3. Control system ... of PowerElectronics
Fundamentals of Power Electronics
First Edition
R. W. Erickson
Power Electronics Group, University of Colorado at Boulder
About the second edition
A new textbook on power ... into the
power area via the "back door". The powerelectronics field is quite broad, and includes fundamentals in
the areas of
●
Converter circuits and electronics
●
Control systems...
... 240 degrees for the fifth sextant and α - 300 degrees for the sixth sextant.
Example:
A three phase induction machine is fed from PWM VSI controlled using voltage space
ENGNG3070 PowerElectronics ... W.Leonhard; Control of electric drives, 2nd Edition, Berlin: Springer-Verlag, 1996.
[2] J.M.D.Murphy, F.G.Turnbull; Power electronic control of AC motors, Oxford: Pergamon Press, 1988.
[3] B.K.Bose; Power ... VSI and a PWM VSI. A six-step VSI is therefore analysed. Power
circuit of the VSI and associated voltage wave-forms, valid for six-step operation, are for
convenience shown again in Figs. 6.17...
... 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 ... unit
MPPT
LPPT
Operator
Controller
speed
d
Control
strategy
VSWT Control unit
VSWT Electrical unit
Fig. 1. Control concept of VSWT with non-inverting buck-boost DC-DC converter.
14th International PowerElectronics ... proposed new
control strategy is combination of hybrid MPPT algorithm
[4] for the normal operation of the VSWT and Limited
Power Point Tracking (LPPT) logic algorithm for the limit
power operation...