Abstract This paper presents an advanced EDU family (Electric Drive Unit) with high system performance. Electric Motor, a new innovative gear set, differential, shift mechanism, dual inverter and cooling are integrated into one compact unit. Gear set and E-Motor inner cooling and lube are realized by a low power, cost effective centrifugal oil pump. The EDU features a water cooling for inverter and stator jacket. The compact gear set is realized as ring gear-less planetary structure with unique design. The complete reduction gear set is captured in one cage and is completely free of axial and radial forces (different than most today´s solutions). The gear set also includes a neutral shift and park lock system. Both systems are actuated by one electromechanical actuator. The park lock is in base principle a conventional park lock with claw, but realized with a multi claw pole in axial actuation to reduce weight and package space of the system. The high end version is equipped with a dual inverter. This allows the usage of a multiphase E-Motor (6 phase Motor is intended solution). In this way cogging torque can be improved without sacrificing efficiency. This gives even better prerequisites for good NVH behavior. As a further side effect the availability and scalability is improved by this approach. This next-gen EDU family shows very high specific values on System level. To achieve this many small and larger innovations were incorporated into the EDU system.
Next gen electric drive unit for passenger cars and light duty vehicles
01.01.2018
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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