Thesis Work - Overmodulation for electric machine i Göteborg

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! 

Background
Permanent magnet synchronous motors (PMSM) are used to propel the vehicle. Today most of the PMSMs operate within the linear modulation range. Overmodulation strategy is an effective way to increase the PMSM output power and utilize the full capacity of DC bus voltage. However, due to the nonlinearity of overmodulation, the current controller need to be compensated to cope with the distorted output AC voltage and thus derease the torque ripple in overmodulation region.

Scope
The main objective is to study different overmodulation strategies and design the current controller to improve the dynamic performance in overmodulation region. Appropriate sub-task would be to make models of the electrical components, derive controllers, and make simulation result to conclude the pros and cons for overmodulation. Strechted tasks could be study the influence by 3-level inverter, test the overmodulation method at Volvo electric machine rig.

Do you fit the profile
We expect that the applying students have experience/studied electrical power engineering which includes power electronics and electrical machine control. The student(s) is also expected to be present on site at Volvo Cars in Gothenburg during most of the thesis work, and any living arrangements needs be to be organized by the student(s).

Duration
•    The work will start in January 2024, exact date is to be discussed
•    The duration for this thesis work is 20 weeks.
•    30 ECTS (academic credits) if in agreement with your Thesis Advisor in University
•    This thesis is to be conducted by 1 or 2 students working in pair. 

How to learn more and apply
Selection will be ongoing during the application period, so do not hesitate to send in your application. Attach your CV and personal letter stating your interests within the given area and your thoughts and credentials.

We want your application no later than 18th of October. Please note that applications via email will not be accepted.

If you have any additional questions regarding the thesis work, you are welcome to contact:
Manager:Matilda Tsambasopoulos, matilda.tsambasopoulos@volvocars.com
Supervisor: Yujiao Song ,  yujiao.song@volvocars.com
 

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