Effect of Shifting Gate Pulse on Average Currents in Coupled SIDO Boost Converter

Abstract

The coupled inductor single input dual output (CI-SIDO) boost converter can supply two outputs from a single input. Compared to two single input single output (SISO) converters, CI-SIDO boost converters have reduced component count, reduced losses, and increased efficiency. These converters have applications in hybrid energy systems, electric vehicles, portable electronic devices like mobiles, cameras, etc. The average currents of these converters are an important factor to be considered. The average value of the current decides the copper loss associated with the device. If the average value increases, the peak currents may increase, thus increasing the current ratings of the MOSFETs and diodes of the converter. In the CI-SIDO boost, the shifting of gate pulses is done to reduce the ripples in the inductor current. However, the shifting of gate pulses changes the inductor current waveforms. The change in waveforms changes the average values of inductor currents, input current, diode currents, and MOSFET currents. The effect of shifting gate pulses on average values of currents has not been investigated. This paper finds the effect of shifting gate pulses on the average values of currents in CI-SIDO boost converters. The analysis is verified by simulations in MATLAB/Simulink.