ABSTRACT
With the rapid development of Microprocessors/Microcontrollers digital controllers are becoming viable one as compared to conventional controllers. To overcome the drawbacks in single loop simple Voltage Mode Controllers and improve the performance of the converter, two loop current mode Controllers need to be designed. This paper presents the step by step design procedure to design a Digital Current Mode Controller for Active Clamp Forward Converter. Small Signal Discrete-time Model of the converter is first designed. Control dynamics of the converter are explained in detailed to design a current mode controller for Active Clamp Forward Converter. A continuous –time current mode controller is first designed and with the help of digital redesign method a digital current mode controller is designed. Finally, the behavior of the Active clamp Forward Converter with designed controllers and achievement of desired compensation is verified by applying disturbances at both ends of the converter.
