Modeling of FPGA- and DSP-Based Pulse Width Modulation for Multi-Input Interleaved DC/DC Converter

Abstract

This paper proposes a development of Pulse-Width Modulation (PWM) switching signals based on Field Programmable Logic Array (FPGA) and Digital Signal Processor (DSP) to control multi-input interleaved DC/DC converter (MIC). The proposed PWM signals for the MIC do not only require a control of duty cycle, but also operation at different PWM frequency. In order to solve this problem, a simple programmable control scheme using a digital controller can be employed to facilitate the realization of PWM signals generation. The PWM signals are designed by using Altera Cyclone II FPGA board. The duty cycle employed to regulate output voltage is attained from the dSPACE DS1103 board using a Proportional-Integral (PI) controller. This paper also highlights design guidelines, simulation and experimental results. Experiment results show that the proposed DC converter can be driven by PWM signals, by integration of both controllers.