Thesis Projekt 30 hp - Electrical Behavior of Insulation Components in Electric Machines

Thesis projects is an excellent way to get a closer contact with Scania and build relations for the future. Several of today’s employees started their Scania career with a Thesis project.

Background

Scania is going through a transformation to become the provider of complete and sustainable transport solutions. The transition is accelerating towards electrically dominant vehicle systems which leads to higher-power duty cycles for electric-drive. This include for example faster switching rate of SiC based power electronic that pushes the insulation system in a different way. Hence, not only the already utilized insulation materials need to be tested in this new condition but also market needs to be explored for alternative insulation materials.

Target

The target approach for this project is to evaluate the properties of the insulation material in a comparatively less-complex scale than the full electric motor. For this, a suitable test system (so called motorettes) has been developed which resembles the actual condition that insulation system is going to face in operation condition. With this approach - by limiting the influencing parameters - the intrinsic properties of the insulation material can be revealed. In parallel, thermal properties of the same materials will be evaluated within another thesis project at the same group.

Description of the assignment

The aim of this project is to evaluate the electrical performance of the insulation system by targeting two of the most important characteristics of the insulation materials; 1) dielectric property and 2) partial discharge performance

The project will be divided in to three parts:

• Assembly of different combinations of the insulation system (wire, slot liner, and impregnation resin) inside the in-house designed and manufactured motorettes
• Investigating the dielectric properties of the motorette system by Dielectric Frequency Response (DFR) measurements
• Understanding the partial discharge performance of the system.

The project will be concluded by a written report and an oral presentation. This Master’s thesis will be done in the department of Materials Technology for Electrification at Scania R&D in Södertälje, Sweden.

Education

M.Sc. Student in: Material science, Engineering, Engineering Physics, Physics
Number of students: 1
Start of work: Spring 2022 and ideally no later than February 2022
Estimated duration: 20 weeks, full time 40 hours per week
Language of work: Good knowledge in English is required

Contact person and supervisor

Tiva Sharifi, Ph.D., Development Engineer, Materials Technology.
tiva.sharifi@scania.com, 0855371432

Application
Your application should contain CV, personal letter and copies of grades

Date of publication:
2021-11-16 – 2021-12-03

Scania is a world-leading provider of transport solutions, including trucks and buses for heavy transport applications combined with an extensive product-related service offering. Scania offers vehicle financing, insurance and rental services to enable our customers to focus on their core business. Scania is also a leading provider of industrial and marine engines. In 2019, we delivered 91,700 trucks, 7,800 buses as well as 10,200 industrial and marine engines to our customers. Net sales totalled to over SEK 152 billion, of which about 20 percent were services-related. Founded in 1891, Scania now operates in more than 100 countries and employs some 51,000 people. Research and development are concentrated in Sweden, with branches in Brazil and India. Production takes place in Europe, Latin America and Asia, with regional production centers in Africa, Asia and Eurasia. Scania is part of TRATON SE.