Development of Dc-Dc Buck Converter for Cathodic Protection Applications

Abstract

Cathodic protection (CP) is crucial for preventing corrosion in metal structures like pipelines, storage tanks, and marine installations, where a stable DC power supply is vital for long-term effectiveness. This paper presents the design of a DC-DC buck converter specifically developed for CP applications. The converter steps down a 200V input to a regulated 50V output using an buck converter, ensuring low ripple and high efficiency. At the heart of the design is a Pulse Width Modulation (PWM)-controlled buck topology with a high-speed MOSFET for switching and feedback control to maintain constant voltage under varying load conditions. The buck converter smooths the output voltage, eliminating noise and providing stable, noise-free DC power, which is essential for reliable corrosion protection in CP systems. The converter achieves over 90% efficiency, reducing power losses while maintaining steady output, making it ideal for high-voltage CP applications. Its rugged design ensures reliable performance in harsh environments, including underground and marine settings, where CP systems are commonly used. Overall, this DC-DC buck converter offers a compact, efficient, and reliable power conversion solution, helping to extend the lifespan of metal structures exposed to corrosive environments while reducing maintenance costs. By providing a stable, regulated DC output, the converter enhances the overall effectiveness and durability of CP systems, ensuring long-term corrosion resistance and protection.