Design And Implementation of Multi Stages Voltage Improvement Based DC-DC Converters for Low Voltage Fuel Cell Applications

Abstract

Fuel cells are being used more frequently in electric cars and renewable energy systems because to the growing need for energy-efficient and ecologically friendly energy systems. However, a DC-DC converter with a large voltage gain is needed for power conversion because of the low and erratic output voltages. To boost the voltage output for fuel cell applications, a multi-stage voltage enhancement-based DC-DC converter has been created in this work. To increase voltage gain, reduce ripple voltage, boost efficiency, and offer stability, the converter uses cascaded boost stages with PI-controlled PWM. Simulink software was used to construct and analyses the DC-DC converter in order to determine voltage gain, efficiency, ripple reduction, and dynamic response. Under typical working conditions, the intended converter increased the input voltage from 12V to 120V. Additionally, the PI-controlled system offered minimal steady state error and a quick transient response with a settling time of 6–10 ms. These findings indicate that the designed converter provides better voltage gain, efficiency, ripple reduction and dynamic performance as compared to traditional boost converter configurations.