Modeling and Simulation of Fractional-Order Phase-Shifted Full-Bridge Converters

Aiming at the fact that the actual order of inductance and capacitance is fractional, this paper uses fractional calculus and state space averaging methods to model and analyze phase shifted full bridge DC/DC converter. The state average model of a phase shifted full bridge DC/DC converter is established, and the duty cycle output voltage and input voltage output voltage transfer functions of the fractional order phase shifted full bridge converter are derived using the state average model. Finally, the fractional reactance component is constructed, and a circuit simulation model of the fractional order phase shifted full bridge converter is built in Matlab/Simulink. By comparing the experimental results with the circuit simulation model of the integer order phase shifted full bridge converter, the correctness of the established model and theoretical analysis is verified. The fractional order circuit simulation model can more accurately describe the operating characteristics of the phase shifted full bridge converter.