Analysis and comparison of four compensation topologies of contactless power transfer system

This paper discusses four compensation topologies of magnetic coupling system suitable for use in contactless power transfer (CPT) applications. The design and modeling process of CPT system is described in detail. Resonance between the source and load is achieved with compensation capacitors connected at the terminals of the coils. Electric equivalent circuit models are used to describe each circuit topology; which yields reflected voltage, primary and secondary current and impedance of the system. The theory of CPT system using compensation topology is verified using an experimental set-up connected to a rectangular primary coil and secondary coil. Various experiments are conducted for different frequency, load and distance. The analysis compares the efficiency of four compensation topologies and its results are reported.