Capacitive Power Transfer

Abstract

This study critically examines Wireless Power Transfer (WPT) technology, with a focus on its two primary methods: Inductive Power Transfer (IPT) and Capacitive Power Transfer (CPT). Emphasis lies on CPT technology, its merits, and constraints. The investigation also delves into diverse compensation topologies to ascertain the optimal solution. Considering applications like electric fence energizers, requiring substantial power and voltage isolation often achieved through bulky transformers, this study proposes two CPT models—double-side LC topology and L-CL topology. These models aim to reduce transformer-related design costs. They incorporate standardized Equivalent Series Resistance (ESR), device characteristics, thermal properties, and a 1 M ohm output load to emulate a model that closely mirrors real- world conditions. Simulation results endorse CPT implementation in electric fence energizers. The costlier double-side LC topology model boasts 93% efficiency, while the L-CL topology model offers greater power efficiency at 73%. This research advances CPT's potential for real-world application, addressing power and cost considerations.