Design and Simulation of a Multilevel Boost Converter

This study proposes a high-gain boost converter design based on the Cockcroft-Walton voltage multiplier (CW multiplier). By increasing the number of multiplier stages, the proposed topology achieves high voltage gain without modifying the main switching circuit structure or control strategy. The use of a single-switch topology effectively reduces voltage stress on the power switch while delivering high voltage conversion. Additionally, the design integrates a traditional boost converter with a single-stage voltage multiplier and operates under discontinuous conduction mode (DCM), which simplifies the control strategy and reduces conduction losses, thereby improving overall efficiency and system stability. The paper elaborates on the operating principles of the voltage multiplier circuit based on the boost converter. It adopts the NCV8873 controller to implement pulse width modulation (PWM) and voltage regulation, ensuring stable output voltage. To validate the feasibility of the proposed converter architecture, simulation analysis is carried out using Power Simulation (PSIM) software, confirming the accuracy of the developed model and the effectiveness of the PWM control scheme.