Interleaved Power Converter with Current Ripple Cancelation at a Selectable Duty Cycle

This work proposes a topology for a boost converter with the capability of canceling the input current ripple at an arbitrarily selected duty cycle. In the traditional interleaved boost converter the zero input current-ripple feature depends on the number of interleaved switching circuits. For example, two traditional interleaved converters have a zero input current ripple if and only if the duty cycle is 0.5. Other advantages of this proposed topology are: (i) the perfect ripple-cancelation duty-cycle can be selected without increasing the component count, (ii) higher voltage gain compared to the traditional interleaved boost converter; this feature is highly desirable in renewable energy applications, (iii) the voltage gain can be easily increased with a diode-capacitor voltage multiplier. Experimental results and a theoretical analysis are presented in this work.