Design of a Novel Multiphase Interleaved Boost Converter with Split Inductance and Bypass Capacitance

The increasing use of renewable energy sources for energy-saving causes the heavy reliance on DC-DC converters, most prominently the boost converter. However, the standard boost converter limits the resulting voltage and introduces a high current ripple which may draw discontinuous current from the source, further worsening the switching noise that may spread to neighboring circuits. This research proposes a new method, split inductance and bypass capacitance, to suppress the input current ripple and increase voltage gain. The splitting of the two components allows improved filtering between the source and the power stage of the converter and provides a two-way noise limiter. Computer simulations were conducted to compare the performance of the standard with the proposed multiphase boost converters. Results show that the input current ripple was 2.42% for the 4-phase standard boost converter and 0.049% for the proposed multiphase interleaved boost converter. Furthermore, the voltage gain is 1.35 for the standard multiphase boost and 1.61 for the proposed multiphase interleaved boost converter.