Simulation and real time implementation of fuzzy controller for CUK converter ope rating in buck mode

Several efforts are being done in order to reduce the impact of conventional rectifiers on the grid in terms of power factor and current harmonics. For this purpose, standard topologies like Boost and Flyback, CUK and Sepic are widely used, they are also gaining attention due to inherent short -circuit protection, step up and step down regulation, reduction of input current ripple by inductor coupling. The operation of CUK converter is quite different from the operation of PWM converters. The principal motivation behind the development of the CUK converter has been their ability to provide unity power factor at constant duty cycle and reduced switching losses. The present work is to design the DC-DC CUK converter and the converter operation is monitored and controlled by using f uzzy logic techniques are implemented in TMS320F2407 DSP controller. The main concept of the project is the output voltage is step down with the help of CUK converter, so the converter is operating in buck mode, which is achieved by reversing the diode direction and the converter is experimentally validate theoretical results of this project provide an improved understanding of the dynamics of the converter beyond the linear characteristics. So the converter operation is analyzed for typical switch -mode power supply and battery charging applications. MATLAB software and TMS320F2407 DSP are used to study the dynamics characteristics and analyze the closed loop performance of this converter with resistive load under supply and load disturbances.