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This article presents a analysis, design and implementation of non-linear controllers for fundamental negative super lift Luo-Converter (FNSLLC) for purposes needing the stable power source in battery operated portable devices, floppy/hard disk drives, LED TV, physiotherapy medical instrument, lap-top computers, mother board and fan in central processing unit (CPU) applications etc.,. The FNSLLC is a advanced DC-DC converter topology. The FNSLLC is erratic structure system (ESS) and its dynamic analysis is poor. The linear regulators for FNSLLC are poor operating analysis particularly during large source voltage and load modifications. With the aim of improve the dynamic analysis, load voltage and coil current controls of FNSLLC, a linear quadratic regulator (LQR) plus fuzzy logic controller (FLC) is designed. The LQR is designed for FNSLLC with their state space dynamic equations. The controller formation of this converter consists of two loops like, current loop (CL) and voltage loop (VL). In this study, LQR is act as a inner CL for manipulating the coil current of FNSLLC, but the FLC is act as a VL for controlling the load voltage of FNSLLC. The FLC is developed depending on the same system activities and qualitative linguistic control rules. The performance of FNSLLC using LQR plus FLC is verified at various operating states by building both in MATLAB/Simulink and prototype field programmable array (FPGA) models in comparisons with LQR plus proportional double integral controller (PDIC). The results and time domain specifications analyze are presented to prove the adroit of designed controller in different provinces. [ABSTRACT FROM AUTHOR]

Multilevel inverters are most popular in power converter applications due to reduced dv/dt, di/dt stress upon the switches and reduced harmonics. This paper suggests a circuit configuration of multilevel current source inverter with single-rating inductor topology. The proposed nine-level current source inverter has been tested under symmetrical and asymmetrical modes of operation for different loads, and their operations are compared using PI and fuzzy PI controllers with multicarrier PWM strategy. MATLAB/Simulink simulation has been carried out for the proposed inverter to obtain its performance measures. [ABSTRACT FROM AUTHOR]