Abstract
This article studies a design and implementation of state-feedback control problem for dc-dc Positive Output Super Lift Luo (POSLL) converter by considering the line and load disturbances for needing desired power source for various portable electronic equipments like battery charger, hard disk drives, medical device, LED TV etc. The POSLL’s dynamic performance becomes non-linear in nature; the designed controller able to get superior dynamic performance given by load estimation is done by using an observer and by combining the state-feedback control with the load estimator, a controller which is explicitly developed with strong robustness using separation principle. An effectual stability analysis is exemplified to prove that by carefully selecting the state feedback control and observer gain matrix, the output voltage of the dc-dc POSLL converter tracks the desired value irrespective of the uncertainties. Extensive simulation is carried out using MATLAB/Simulink model. The result based on time domain analysis is done by using the controllers for various disturbances given to the converter.
Highlights
Switched mode dc-dc power converters are widely used in the field of Power Electronics for the past few decades
When compared with the basic converter topologies like buck and boost converters which are of second order, the Positive Output Super Lift Luo (POSLL) converter is of higher order
The eventual intention is to design an efficient controller for the POSLL converter and to make the converter track the desired reference values despite of large load disturbance and wide variations in the source voltage
Summary
Switched mode dc-dc power converters are widely used in the field of Power Electronics for the past few decades. N. Arunkumar et al 3972 have been in increasing rate due to their wide range of applications in various fields such as computer peripheral systems, medical equipments, communication devices, adapters in consumer electronics, portable electronic devices, fuel cell applications, photo voltaic arrays, power factor correction applications, and harmonic elimination. Arunkumar et al 3972 have been in increasing rate due to their wide range of applications in various fields such as computer peripheral systems, medical equipments, communication devices, adapters in consumer electronics, portable electronic devices, fuel cell applications, photo voltaic arrays, power factor correction applications, and harmonic elimination These switched mode dc-dc power converters have several advantages in comparison with linear power supplies. The major disadvantage is that this method is derived by assuming zero initial conditions [4] This drawback can be overcome by state space averaging technique. The POSLLC has been reduced to a lower order by which the state model can be reduced to a lower order converter [6]
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