Power Electronics

Abstract

Magnetic resonance power transfer is achieved by means of an electromagnetic field. Specifically, the induced voltage is related to the rate of variation in the magnetic flux. Taking into account the voltages required in EV charging and the maximum space available to allocate the coils in the vehicle, it is concluded that the frequency of the electrical signal provided by the grid is not sufficient for this operation. Consequently, frequency conversion becomes a necessary step in EV wireless chargers. For this operation, power converters are incorporated on both the primary and the secondary sides. This chapter reviews the topologies of the power converters used in EV wireless chargers, paying special attention to the control techniques. This review comprises uni-directional and bi-directional wireless chargers.