On power loss minimisation for heavy vehicles with axle-wise and modular electrical propulsion and friction braking
Licentiate thesis, 2023
In this thesis, to explore the potential of minimising the power losses, two powertrain topologies are analysed, namely, single e-axle group and multiple e-axle group. Additionally, a configuration of the multiple e-axle group called cruise and startability axles, with two different types of electric machines and gear ratios, is also presented. To coordinate the usage of actuators within these topologies, an algorithm that minimises the power losses of electric machines and friction brakes, while considering axle force limits, is introduced.
The power loss minimisation algorithm is then evaluated for a vehicle configuration using inputs, representing real-world operating points. The results show that the axle force limits introduced as constraints in the algorithm, influence the power loss minimisation potential of the topologies. For the inputs under study, the single e-axle group uses a large proportion of friction brakes instead of regenerative braking, resulting in high losses. Furthermore, it is shown that using multiple e-axle group topology with power loss minimisation increases the regeneration capabilities and vehicle performance.
friction brakes
powertrain
power loss
electric machines
Heavy vehicles
topology
Author
Sachin Janardhanan
Chalmers, Mechanics and Maritime Sciences (M2), Vehicle Engineering and Autonomous Systems
Concept design of electric cruise and startability axles for long haul heavy vehicles to maximise driving range
2021 IEEE Vehicle Power and Propulsion Conference, VPPC 2021 - ProceedingS,;(2021)
Paper in proceeding
Motion control and power coordination of electric propulsion and braking distributed on multiple axles on heavy vehicles
2022 IEEE Vehicle Power and Propulsion Conference, VPPC 2022 - Proceedings,;(2022)
Paper in proceeding
Reviewing control allocation using quadratic programming for motion control and power coordination of battery electric vehicles
2022 IEEE Vehicle Power and Propulsion Conference, VPPC 2022 - Proceedings,;(2022)
Paper in proceeding
Configurable Modular Electrically Propelled and Advanced Actuated Axles Installations for Heavy Duty Vehicles
Swedish Energy Agency (2019-027428), 2020-04-01 -- 2023-03-31.
Volvo Group, 2020-09-01 -- 2025-02-28.
Swedish Energy Agency (P2023-00590), 2023-07-01 -- 2025-12-31.
Areas of Advance
Transport
Subject Categories
Vehicle Engineering
Other Electrical Engineering, Electronic Engineering, Information Engineering
Publisher
Chalmers