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In this paper, the design of a proportional integral controller (PIC) plus fuzzy logic controller (FLC) for the negative output elementary super lift Luo converter (NOESLLC) operated in discontinuous conduction mode (DCM) is presented. In spite of the many benefits viz. the high voltage transfer gain, the high efficiency, and the reduced inductor current and the capacitor voltage ripples, it natured with non-minimum phase. This characteristic makes the control of NOESLLC cumbersome. Any attempt of direct controlling the output voltage may erupt to instability. To overcome this problem, indirect regulation of the output voltage based on the two-loop controller is devised. The savvy in the inductor current control improves the dynamic response of the output voltage. The FLC is designed for the outer (voltage) loop while the inner (current) loop is controlled by the PIC. For the developed ?19.6 V NOESLLC, the dynamic performances for different perturbations (line, load and component variations) are obtained for PIC plus FLC and compared with PIC plus PIC. The study of two cases is performed at various operating regions by developing the MATLAB/Simulink model.

This article studies on the design of a Novel Modified Bridge Less Canonical Switching Cell converter (MBL-CSC) in discontinuous inductor current mode (DICM) using voltage follower approach. The main benefits of existing canonical switching cell (CSC) converter are energy saving, rapid response, complete removal of diode bridge rectifier (DBR) at the front end. Though the existing CSC converter has benefits, it needs to have lesser number of components, least conducting devices, unity power factor improvement, and efficiency improvement. With the intention of decreasing number of components, conduction losses, attainment of least conducting devices and improvement of unity power factor, recent CSC converter is modified as a novel bridge less canonical switching cell(MBL-CSC)converter and it improves considerable increase in efficiency on the magnitude of 2–3%. Here the proposed novel modified bridgeless canonical switching cell converter uses discontinuous inductor current mode by using voltage follower approach to regulate the load voltage and unity power factor improvement. In addition making use of this converter for injecting LED lamp driver is studied for developing economic cost solution for low power application. A voltage follower approach is useful for having control over the brightness of LED lamp and power factor correction. The operation, design and control of novel modified bridgeless canonical switching cell converter on LED lamp driver is described. Steady state as well as dynamic state performance is done through MATLAB/SIMULINK model. Simulation results are obtained with enhanced power quality at the ac mains for extensive range of LED lamp load voltages and input supply voltages.