Cascaded hybrid fibonacci DC-DC converter with interleaved clock for DC grid

Abstract

A Cascaded hybrid Fibonacci DC-DC converter with interleaved clock for DC grid is proposed. A hybrid Fibonacci stage is connected in series and the interleaved clock is applied. The modified converter is proposed by using two inductors in place of two switches of a typical X3 Fibonacci converter. By this modification, the converter achieved up to 20 of conversion rate (CR) at duty ratio of D=0.84. The converter consists of two switches, three diodes, and three capacitors for a total of 10 elements. This component count is less than that of the past leading works of the high step-up DC-DC converters. The operation principle was verified using PSIM simulator. A laboratory prototype DC-DC converter achieved CR of 19.5 at D=0.85.