Thesis Work -NON-ISOLATED HV Battery AC CHARGING BY USING CHB (Cascaded H-Bridge Converters)

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 and advanced research 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
The growing demand for electric vehicles (EVs) has created a significant need for more efficient, compact, and cost-effective charging technologies. With the global push towards decarbonization and the widespread adoption of renewable energy sources, EVs are seen as a key component of sustainable transportation. However, a major challenge in the EV sector is the development of high-performance charging systems that meet the needs of both consumers and power grid operators.

Traditional charging architectures for EVs typically rely on isolated AC-DC converters, which provide galvanic isolation between the grid and the vehicle. While these isolated systems offer safety benefits, they come with downsides such as increased size, cost, and complexity. Moreover, the rising power demands from EVs require more advanced topologies to handle high power levels while maintaining efficiency and minimizing electromagnetic interference (EMI).

Scope
The objective of the thesis work is to analyze and perform measurement of a grid connected inverter for non-isolated AC charging of HV battery
Main tasks:
1.    Perform literature study over grid connected inverters
2.    Build a model of CHB converter in PLECS 
3.    Develop a controller for both charging and discharging of the Battery
4.    Investigate different grid configurations and parameters
5.    Test and measurement of relevant parameters like Y-capacitors and leakage current
6.    Fault mode analysis of grid connected inverter (CHB)

Your skills
•    Electric power, Mechatronics, Control Theory, Electric drive engineering or equivalent
•    Model-based development (Matlab/Simulink or PLECS) 
•    Mandatory to have a very good understanding of grid connected inverter for this master thesis.
•    Experience of PLECS is meritorious

Duration
•    The work will start around third week of January 2025
•    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 suitable for up to 2 students. Please apply individually but state the thesis partner’s name in the personal letter if you have a particular applicant to pair up
•    The work will be performed in Gothenburg
                    

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. Please apply no later than 15 November.
If you have any additional questions regarding the thesis work, you are welcome to contact the following persons:
Manager: Per Torstensson    per.torstensson@volvocars.com   
Supervisors:
Torbjörn Larsson   torbjorn.larsson@volvocars.com   
Alireza Norouzzadeh  alireza.norouzzadeh@volvocars.com   
Anders Mikiver        anders.mikiver@volvocars.com    

Volvo Cars - Driving change together
Volvo Cars’ success is the result of a collaborative, diverse, and inclusive working environment. Today, we are one of the most well-known and respected car brands, with around 43,000 employees across the globe. At Volvo Cars, your career is designed around your skills and aspirations, allowing you to reach your fullest potential.