Design of an automotive 48 V integrated starter-generator on the basis of an induction machine with concentrated windings

This paper presents a novel automotive integrated starter-generator (ISG) system in order to meet the requirements on upcoming limits concerning CO₂ emissions for future car fleets. Set up on a vehicle's 48 V supply a convenient ratio between benefit and cost can be achieved. Usage of an induction machine between combustion engine and transmission forms a robust and reasonable solution for implementation into the safety-critical drive train and avoids dependence on expensive rare earth materials. Due to tough package situations in both axial and radial directions, the adaption of an induction machine with concentrated windings is investigated.