A Quartic Buck Converter for Capacitive Deionization based Water Desalination System

Capacitive deionization (CDI) is a competitive water desalination technology for brackish and tap water desalination, due to its low energy requirements. This paper presents an overview about working principle and operation requirements of CDI. Moreover, the quartic buck converter is proposed to electrify CDI from PV arrays. the main feature of the quartic buck converter is the high step-down voltage conversion ratio which allows operation at high switching frequencies. The analysis of the proposed quartic buck converter in continuous conduction mode (CCM) is presented. Simulation and experimental results are provided to verify the analysis and to evaluate the performance of the quartic buck converter.