Comparison and design of different electrical machine types regarding their applicability in hybrid electrical vehicles

Because of high requirements in power, efficiency, installation space and weight, the design of electrical machines for hybrid electrical vehicles is a particular challenge. In order to make an informed decision, several machine types are pre-dimensioned by means of analytical formulae and compared with respect to their power density, efficiency and their applicability in hybrid vehicle concepts. The analytical pre-designs are evaluated by the finite element method (FEM). With regard to a parallel hybrid system with a very restricted installation space, a further study is performed on the permanent magnet excited synchronous machine, preferred for its highest power density and overall efficiency.