Konceptstudie av eltransmission för 8-hjulsdrivet fordon

Sammanfattning: SEP Modular Armoured Tactical System is the next generation of military vehicles developed by BAE Systems Hägglunds AB. At present time, BAE Systems Hägglunds AB are developing a 6-wheel electrical hybrid and a conventional 8-wheel vehicle. The question formulation was summarized as: “In which ways can the electrical transmission in a hybrid driveline for SEP be designed, when the surrounding fixed interfaces are kept and the unity of components within SEP is maximized?“. The purpose of this master thesis was to study a variety of concepts for hybrid propulsion. The aim with the study was to examine how an 8-wheel SEP can be designed for electrical hybrid propulsion. BAE Systems Hägglunds AB requested a unity of components with the existing drive systems for SEP 6- and 8-wheel concerning hub reduction, wheel suspensions, drive shafts and axle gears. The developed systems for steering and cooling should be kept if possible and use of 20 ″rims was a requirement. The work started with a background study and was followed by a phase of concept development. A range of concepts for driveline layouts were compiled. The work focused on placement of electrical motors, gears and power electronics. The concepts were evaluated from a worked-out model and three of the concepts were chosen for further development. These concepts had their gears dimensioned and their shifting mechanisms designed. The result of the study showed that two of the concepts satisfied the requirements and were nominated for additional work, but their estimated development time differs. The two concepts have great potential to be used in more vehicles than SEP. Suggested future tasks were among others detailed design of gears, electrical motors and adjacent components