Innovative and Highly Integrated Modular Electric Drivetrain
Artikel i vetenskaplig tidskrift, 2019

A highly integrated electric drivetrain module with 157 kW peak power is presented, which
incorporates novel technologies in the field of electric machines, power electronics and transmissions:
1. High-speed electric machine with six phases and injection mould polymer-bonded magnets; 2.
High-ratio dual-speed transmission with double planetary gear set (Ravigneaux gear set); 3. Gallium
nitride (GaN) power electronics with winding reconfiguration feature.The combination of these
components in one single housing makes the drive module flexible to integrate and to combine
with conventional or alternative propulsion technologies, thus allowing various hybrid and electric
drivetrain topologies. All technologies are selected in accordance with mass production potential
and can therefore have a high impact on the automotive market in the future. Currently, the drive
module is under development; the first models will be assembled in winter 2019. The integration into
a demonstrator vehicle in 2020 will prove the potential of many new technologies and the suitability
for the automotive market.

ravigneaux gear set

multi-phase electric machine

gallium nitride

electric drive module

holistic drivetrain design

hybrid synchronous machine

injection moulding


Mathias R Lidberg

Chalmers, Mekanik och maritima vetenskaper, Fordonsteknik och autonoma system

World Electric Vehicle Journal

2032-6653 (ISSN)

Vol. 10 4


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