A Single-Switch Non-Isolated Ripple-Less Step-Up DC-DC Converter With Ultra-High Gain Capability

This article introduces a nonisolated ultrahigh step-up dc–dc converter that utilizes one coupled-inductor (CI) and a voltage multiplier circuit to enhance the voltage gain. The proposed topology integrates a quadratic boost converter with a voltage multiplier circuit (diode-capacitor cell). Furthermore, the recommended converter uses one coup CI led-inductor in a small turn ratio which has achieved high voltage gain and is classified as an ultrahigh step-up dc–dc converter. In addition, the proposed design is appropriate for renewable energy sources with the minimal input current ripple. Moreover, the notable benefits of the proposed converter include high voltage gain, low voltage stress across the single switch and diodes, continuous input current, common ground, simple structure and control, and low weight which enhance its performance. Subsequently, the relationships between the operation modes and steady-state analysis thoroughly are provided. Eventually, a 300 W laboratory prototype is constructed to validate the expressed claims with 24–400 V, input and output voltages, respectively.