New inductive contactless energy transfer system for residential distribution networks with multiple mobile loads

This paper proposes a novel inductive contactless energy transfer system for residential distribution networks. The system is based on a resonant inverter with sliding transformers, allowing high flexibility (the connection point of the loads is movable) and high safety (electrical shocks are avoided). A new resonant topology for driving the sliding transformers is proposed which behaves as an AC high-frequency voltage source. A very interesting feature of this voltage source is that the amplitude of the output voltages is nearly constant and independent of the load consumption. The paper presents a design procedure for calculating the components and parameters of the resonant circuit. The performance of the complete contactless system is evaluated, especially the efficiency and the transient response. The reported results show good performance validating the proposed topology.