Enhanced Efficiency and Cost‐Effectiveness in PWM DC‐DC Boost Converter Through Direct Power Transfer and Reduced Capacitor Voltage

ABSTRACT This paper presents a novel DC–DC boost converter topology that works similarly to a conventional PWM DC–DC boost converter, but with remarkable improvements. When the filter capacitor voltage in the conventional converter matches the output voltage, the proposed converter lowers the filter capacitor's rated voltage by an amount equivalent to the input voltage. As a result, compared to conventional boost converters, the proposed converter achieves 6% higher power density and 6.3% cost reduction due to the filter capacitance with the lower rated voltage. In addition, the proposed converter enables direct power transfer (DPT) by transferring part of the input energy to the output stage when the switch is in the on‐state. This feature not only simplifies the structure of the converter but also increases its efficiency and lowers the cost, making it more practical for various applications. Comprehensive theoretical analyses of the converter are provided, supported by implementing of a 50‐kHz, 100‐W laboratory prototype. The experimental results validate the theoretical analyses, demonstrating an overall efficiency of 95.1% at the nominal output power rating.