Joint Optimization of Transmission and a Control Allocator to Minimize Power Losses in Electric Vehicles
Paper in proceeding, 2022

The objective of this paper is to explore the potential of combining hardware and software design parameters in the optimization for reduced energy consumption in an electric vehicle. The vehicle used has four electric motors connected to one wheel each through a single speed transmission and a controllable coupling. The software design parameter consists of a control allocator based on a quadratic optimization program that distributes torque and wheel angle to minimize power losses in the electric motors, inverters, transmission and tires. The control allocation algorithm is then used in combination with the hardware design parameters, consisting of a controllable coupling and different transmission ratio setups between front and rear motors, in order to evaluate the joint effect on energy consumption. It was found that the energy consumption can be reduced by 8.4 % compared to equal torque distribution on all wheels.

Transmission ratio

Control allocation

Electric vehicles

Energy efficiency


Juliette Torinsson

Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Engineering and Autonomous Systems


Mats Jonasson


Bengt J H Jacobson


Derong Yang

Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Engineering and Autonomous Systems

Lecture Notes in Mechanical Engineering

21954356 (ISSN) 21954364 (eISSN)

9783031073045 (ISBN)

27th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2021
Virtual, Online, ,

Next Generation of Algorithms to Enhance and Balance Energy Efficiency and Driving Dynamics for Electric Cars

Swedish Energy Agency, 2018-10-15 -- 2023-03-14.

Subject Categories

Vehicle Engineering

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering



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