Beta-Quasi-Z-Source (β-qZS) DC-DC Converter Without Duty Cycle Constraint or Wide Input Voltage Applications

초록

A novel beta-quasi-Z-source (beta-qZS) converter is proposed for an isolated dc-dc converter with the buck (step-down) and boost (step-up) functions. The beta-qZS isolated dc-dc converter addresses the common challenges such as components stresses, reliability, suppression of switch voltage overshoot, size, and power derating in the existing impedance source-based isolated dc-dc converter applications. In addition, the proposed topology dealt with operating duty cycle constraint and loss of duty cycle phenomenon in the Z/qZS galvanically isolated dc-dc converters. This article describes the configuration and provides the principle of operation for the proposed beta-qZS converter topology. A laboratory prototype is developed, and the experimental results satisfy the theoretical analysis.

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