Hybrid Excitation Synchronous Machines: Energy Efficient Solution for Vehicle Propulsion

In this paper the suitability of a class of electric machines for vehicle traction application is discussed. These machines, known as hybrid excitation synchronous machines, combine a permanent magnet excitation with wound field excitation. The goal behind the principle of hybrid excitation is to combine advantages of PM excited machines and wound field synchronous machines. It is shown that these machines have good flux weakening capability compared to PM machines, and that they constitute an energy efficient solution for vehicles propulsion