Parametric design of the traction motor and energy storage for series hybrid off-road and military vehicles

Focusing on off-road and military hybrid vehicles, this paper fundamentally studied the design and the impact of the traction motor drive characteristics on vehicle performance, transmission requirement, energy storage, and reliability. This study focused to the impact of the extended speed of the motor drives on their power ratings, and therefore, of the energy storage size for given acceleration and gradeability specifications. Furthermore, hybrid electric energy storage, consisting of batteries and ultracapacitors, is investigated, in which batteries are used as the energy source and ultracapacitors as the power source. This hybrid energy storage can be much more compact and lighter than either the batteries or the ultracapacitors alone as the energy storage. All the data used in the paper is based on a 10-ton series hybrid off-road military vehicle.