Integrated hub-motor drive train for off-road vehicles

A new concept that integrates a permanent magnet (PM) synchronous motor (PMSM) and a 2-step planetary gearbox for heavy machinery electric traction is introduced. A clear need for this kind of a solution is recognized in the field of diesel-electric hybrid off-road vehicles as electrical machine cannot fulfill alone all the demands of the typical load cycles of working machines. The technology introduced also suits in some road vehicle use e.g. for buses or trucks. The benefits of the solution are pointed out and its functionality is proven by simulations. The dynamic performance of the driveline is analyzed using a co-simulation approach that accounts the mechanical system and the dynamics of the control system.