The best place to work in the Global Automotive Industry. Join us on this exciting journey into the future, we want to hear from you!
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
Inverters are used in automotive to be able to control electrical machines to produce the desired speed and torque to propel the vehicle. In order to lower the losses, today’s EV primary battery voltages increase from 400V to 800V. Compare with 400V system, 800V battery system put higher voltage stress on each power switching devices. One solution is to introduce multilevel inverter, which has advantages of less device stress, less voltage harmonic distortion and less converter losses. Neutral point voltage converter (NPC) has been studied to be one of the optimal topology of multilevel inverter. However, one of the challenge of NPC is to achieve balanced neutral point voltage. It is caused by the average neutral point current in a switching period is not necessary to be zero and thus a high-performance neutral point voltage controller is needed.
Scope
The main objective is to design and study different modulation strategies and controllers to balance the neutral point voltage of 3-level neutral point clamped inverter. Appropriate sub-task would be to make models of the electrical propulsion system, such as battery, inverter, and electric machine; evaluate the controller and study the dynamic performance. Strechted tasks could be study modulation method to balance power switching devices losses of an active NPC inverter (ANPC), test the control method at Volvo ANPC inverter prototype.
What you´ll bring
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.
Be part of the change – apply today!
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.
Please note that applications via email will not be accepted.
Apply as soon as possible but no later than 2023-11-05 .
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
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
29-09-2024
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