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Implementation of Robust Prediction Observer Controller for DC-DC Converter
Shenbagalakshmi, R.,Raja, T. Sree Renga The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.6
A discrete controller is designed for low power dc-dc switched mode power supplies. The approach is based on time domain and the control loop continuously and concurrently tunes the compensator parameters to meet the converter specifications. A digital state feedback control combined with the load estimator provides a complete compensation, which further improves the dynamic performance of the closed loop system. Simulation of digitally controlled Buck converter is performed with MATLAB/Simulink. Experimental results are given to demonstrate the effectiveness of the controller using LabVIEW with a data acquisition card (model DAQ Pad - 6009).
Implementation of Robust Prediction Observer Controller for DC-DC Converter
R. Shenbagalakshmi,T. Sree Renga Raja 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.6
A discrete controller is designed for low power dc-dc switched mode power supplies. The approach is based on time domain and the control loop continuously and concurrently tunes the compensator parameters to meet the converter specifications. A digital state feedback control combined with the load estimator provides a complete compensation, which further improves the dynamic performance of the closed loop system. Simulation of digitally controlled Buck converter is performed with MATLAB/Simulink. Experimental results are given to demonstrate the effectiveness of the controller using LabVIEW with a data acquisition card (model DAQ Pad . 6009).
M. Marimuthu,S. Vijayalakshmi,R. Shenbagalakshmi 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.5
This paper presents a high gain non isolated Multilevel Cascaded Boost Converter (MCBC) for Electric vehicle applications. The proposed converter associates the basic cascaded Boost converter along with multilevel boost converter for boosting the voltages generated from diff erent sources like solar energy, fuel cell and Battery. The multilevel boost converter is intended to be utilized as a dc link in which the high gain boosted voltage is provided to the multilevel inverter. By expending a single driven semiconductor switch and an inductor, the proposed converter is capable of producing high voltage gain with continuous input current and much higher step up conversion ratio. It not only allow to operate at much higher frequencies but aids in operating with a minimum duty cycle without a transformer. The proposed converter with fi ve cascaded levels are simulated and is verifi ed experimentally. The results thus illustrated go in concurrence with each other.
A Novel Double Frequency SEPIC Converter with Improved Transient Characteristics and Efficiency
Vijayalakshmi S.,Marimuthu M.,Jayakumar N.,Vighneshwari B. Devi,Paranthagan B.,Rani Nisha C.,Shenbagalakshmi R. 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.2
A novel double frequency SEPIC converter is discussed in this paper. Effi ciency, static and dynamic characteristics of the dc to dc power converters are the concerned factors in power electronics. In order to improve the above factors, switching frequency play a vital role in converters. Hence, include High switching frequency in the converter can improve the dynamic characteristics, but it reduces the effi ciency. In other words, put in low switching frequency in the converter may result in better effi ciency but produces poor dynamic characteristic. In this concern double-frequency SEPIC converter is proposed. This SEPIC dc-dc converter consists of two SEPIC cells: one functions at high switching frequency, and other functions at low switching frequency. The proposed SEPIC converter reveals enhanced steady state and transient characteristic than the other single frequency SEPIC converter and produces high effi ciency also. The results of simulation and hardware prove that the anticipated converter extremely progresses the effi ciency and displays more or less equal the same dynamics as the traditional high frequency SEPIC converter.