Different operation of the MSC converter to reduce the input current ripple

This article examines a recently proposed dc-dc converter topology, the Modified Series Capacitor (MSC) converter, a kind of interleaved converter with reduced voltage on semiconductors. The current operation of the converter is driven by two transistors with the same duty cycle, in which switching functions are shifted 180° (like the traditional interleaved buck converter). The converter has two inductors of equal inductance. This article proposes a new design and operation in which different duty cycles are used. The main advantage of the proposed design and operation is that the input current ripple can be reduced without increasing the inductance. Another option is to achieve a certain amount of input current ripple with inductors of lower inductance (compared to the current MSC converter). An experiment was built, tested, and verified to demonstrate the principle of the proposition.