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Thesis Work - Optimal Energy Management of BEV Powertrain

Thesis Worker at Volvo Cars

Welcome to explore the world of Volvo Cars by writing your thesis with us! As a thesis worker in our organization you are supported by a supervisor who follows you during your project. All thesis projects are arranged in business critical areas and therefore you will be able to contribute to our company purpose – providing freedom to move in a safe, sustainable and personal way – from day one! 



At Vehicle Energy and Motion Control, our purpose is to develop and deliver the most energy efficient and situation adopted ride and drive experience. Evaluating driver input, surrounding information (e.g. camera, radar and route data) and Autonomous Drive request, as well as vehicle state sensor input, our software (mainly inhouse developed) coordinates the different actuators (engine, motors, brakes, steering) to fulfill our purpose and balance vehicle attributes. 


A typical BEV powertrain consists of more than one e-motor connected to the wheels and can be used to deliver the driver demand. Typically, a 3-phase synchronous (PMSM/BLDC) or a-synchronous machine is preferred in such applications, where its controlled using a 3-phase inverter. The machines exhibit differences in their rotational dynamics based on the relative difference in their inertias (electrical and mechanical) and presence of clutch (used to disconnect the e-motor(s) during scenarios were free rolling of the vehicle is possible, thereby reducing the drag losses) in the torque delivery path. Also, the machines and the inverters exhibit differences in their thermal dynamic behaviors and needs an efficient cooling system that could maintain the temperature of these component within limits. The cooling energy needed is an additional demand on the battery capacity, apart from the energy spent to propel the vehicle, thereby affecting the effective range of the BEV. A way to achieve higher energy efficiency and increased range of BEV, in such a powertrain configuration, is to optimize the torque distribution between the e-motors such that the cooling energy demand and the system losses are minimized. 

The aim of the thesis work is to synthesize a control strategy that optimises the energy consumption in BEVs by studying the effect of powertrain actuator dynamics on energy demand. The capabilities of the model-based control framework needs to be exploited, to synthesize an optimal controller for the considered powertrain. Control-oriented models capturing the rotational and thermal dynamics of the actuators needs to be developed and the computational demand of the control strategy should be analysed. 

· Since the project is part of a PhD research project in collaboration with Chalmers, at least one student should be from Chalmers University of technology. 
· Mechanical/Mechatronics/Robotics/Electrical/engineering physics, M.Sc., or similar. 
· Knowledge in Matlab and Model Predictive Control. 
· Knowledge in ‘C’, python, optimal control, nonlinear optimization and thermal modelling is meritorious. 
· Analytical and independent. 
· Valid resident permit in Sweden or be a citizen of an EU/Schengen member state. 

· Your application should include a CV, cover letter and transcript of courses and grades 
· Selection will be ongoing during the application period. We want your application as soon as possible, but no later than 2020-11-29. Please note that due to GDPR, we can't accept applications via email.

· Number of students: 2. 


· 20 weeks / 30 ECTS. 
· Starting date: January-February 2021 (Flexible). Estimated end date: Summer 2021. 
· The work will be performed at the department of Vehicle Energy & Motion Control and the group of Energy Efficiency, Volvo Cars Corporation, Göteborg. 
Contact Supervisor: Anand Ganesan (anand.ganesan@volvocars.com) 
Manager: Ole-Fredrik Dunderberg (ole-fredrik.dunderberg@volvocars.com) 


Who are we?

Everything we do starts with people. Our purpose is to provide freedom to move, in a personal, sustainable and safe way. We are committed to simplifying our customers’ lives by offering better technology solutions that improve their impact on the world and bringing the most advanced mobility innovations to protect them, their loved ones and the people around them. 

Volvo Cars’ continued success is the result of a collaborative, diverse, and inclusive working environment. The people of Volvo Cars are committed to making a difference in our world. Today, we are one of the most well-known and respected car brands, with over 40,000 employees across the globe. We believe in bringing out the best in each other and harnessing the true power of people. At Volvo Cars your career is designed around your talents and aspirations so you can reach your full potential. Join us on a journey of a lifetime as we create safety, autonomous driving and electrification technologies of tomorrow.

Gothenburg, Sweden

Job requisition ID:  47387
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