Analysis of digital PWM design for Zero Voltage Transition Phase Shifted Full bridge converters for space applications

The digital control of Electronic Power Conditioners (EPC) for the space applications is promising. Use of an FPGA for digital control could make improved controllability or flexibility of spacecraft systems from earth station. A high speed ADC, a digital PID controller, a digital PWM generator etc. are the essential components required for implementing digital control in EPCs. This paper unveils a Novel DPWM algorithm for realizing a Zero Voltage Transition (ZVT) Phase Shifted Full bridge (PSFB) topology EPC for space applications. The FPGA implementation has been done using Actel/Microsemi-ProAsic3 programming kit. VHDL programing was done in Microsemi Libero software and simulation/synthesis was done using Modelsim software. The experimental waveforms and simulations are shown to validate the results.