Interleaved hybrid boost converter with simultaneous DC and AC outputs for micro-source applications

This paper proposes an interleaved hybrid boost converter (IHBC) with simultaneous AC and DC outputs for microsource applications. The proposed IHBC is realized by interleaving two boost converters and replacing the control switch of one of the boost converters with H-bridge voltage source inverter network. The IHBC gives DC and AC output simultaneously from a single DC input and has the property that summation of modulation index (m) and the steady state duty ratio (D) may be more than one, i.e., m+D≥1 unlike the conventional hybrid converters. Thus, the proposed IHBC is capable of giving high DC and AC voltage gain and has inherent shoot through protection capability. A suitable modified unipolar sinusoidal pulse width modulation (SPWM) technique is discussed and a feedback loop is designed to regulate the DC output voltage. Steady state and dynamic modeling is carried out to exhibit the advantages of the IHBC. The proposed IHBC is validated for DC microsource (solar cell) through mathematical modeling, simulation, and experimental results.