PROJECT TITLE :

Small-Signal Analysis of Naturally Commutated Current-Fed Dual Active Bridge Converter and Control Implementation Using Cypress PSoC

ABSTRACT:

A close small-signal analysis and a closed-loop control design of a naturally commutated bidirectional current-fed twin active bridge (CFDAB) dc/dc converter are presented. The proposed converter is suitable for a fuel cell vehicle (FCV) between a traction inverter and batteries. State-house averaging technique is employed to derive the little-signal model. Based on the derived tiny-signal model, a closed 2-loop controller is designed and implemented on mixed signal (analog and digital) processor Cypress programmable system-on-chip (PSoC) 5. An entire design procedure is presented. Simulation results using PSIM nine.0.four and experimental waveforms from a 250-W prototype with the designed controller are shown to verify the steadiness of the management system. Experimental results for step changes in load clearly show satisfactory transient performance of the converter and validate the closed 2-loop style. It's appropriate for energy storage, interfacing two dc buses of different voltages during a microgrid and a solar photovoltaic power system to boost a coffee-voltage panel up to the height of the utility voltage.