Design and implementation of digital system for DC/DC boost converter / Muaz Zabir Mohammad Suhaimi

This project presents a design and simulation of DC/DC boost converter by implementing the digital system. DC/DC boost converter is an electronic device that step up its input voltage to a higher output voltage. This system has a nonlinear dynamic behaviour, as it works in switch-mode. In this project, the user will choose desired output voltage and hence, the system will automatically calculate the duty cycle and produce the PWM signal according to that duty cycle. The PWM signal will be injected into power MOSFET and the desired output voltage will be produced by varying the duty cycle. PWM has been designed by using two methods: analog and digital. PWM generator was designed analogously using Matlab / Simulink software, while the digital controller of the PWM was designed by using the Verilog Hardware Description Language (HDL). The performance of the both techniques were compared in term of their steady state and transient response. Matlab/Simulink was also used to create test signals and software test benches for Verilog code to validate the effectiveness of the system being designed. The system was tested by varying the duty cycles at 40%, 70% and 80%. The control design, analysis and simulation results were presented in this project to confirm the performance of the digitally controlled boost converter. To conclude, all the objective of this project had been achieved which is designing and testing the digital controller of boost converter. The design process of digital controller by using Verilog HDL has also been achieved successfully and meet all the requirement. It has also been tested for its effectiveness by implemented into design in Matlab/Simulink using co-simulation process. The results between analog and digital controller of boost converter also have been compared. Among these two systems, digital control was producing good performance compared to analog system.