Inductive Energy Transfer Systems for Electric Vehicles

Inductive energy transfer systems operate like a transformer with an air-gap between the coils. An alternating electric current flows through a primary coil located in the road and generates an alternating magnetic field. This magnetic field passes through a secondary coil system which is attached to the vehicle, and induces a voltage and subsequent flow of current. With this principle, electric energy can be transferred into vehicles inductively and without direct contact.For stationary charging applications, a charging plate is installed at a specific charging location. With dynamic charging, coil sections are built into the road and are activated consecutively, as electric vehicles pass above them, as per the diagram below. These charging sections are only operational when they are needed.