The no-magnet dream in electromobility: a possible reality

Purpose and goal:

There is concern about the environmental impact of electric vehicles. Electrical machines are the most critical components of an electric vehicle. The most energy-efficient electric machines have rare earth permanent magnets - expensive, environmentally harmful, with an unstable supply chain.

This project looks into a high-potential electric machine, the variable phase-pole induction machine (VPPIM). VPPIM are magnet-free and energy efficient, but an evaluation in electric vehicle applications is needed. The goal is to construct a VPPIM based on requirements from Volvo Cars. Expected results and effects:

The project will provide valuable insights into the VPPIM technology and its contribution to sustainability. We are looking for real-case requirements for a VPPIM design, in order to highlight its potential and drawbacks in terms of energy efficiency, reliability, and manufacturing. We will also observe the effects at the system level because VPPIMs can act as small gearboxes and therefore change the mechanical setup.

All in all, we should be able to give a definite answer on whether VPPIMs are a truly competitive solution for electromobility. Approach and implementation:

The project is divided into six work packages AP1 to AP6. AP1 to AP3 are the preliminary packages that refer to project management, definition of simulation tools, and real-case requirements. We need to ensure that we have the right software solutions to design a VPPIM.

AP4 to AP6 are the design and prototyping core work, including measurements, with dissemination of the results. A postdoctoral student will be employed and will be at Volvo Cars for exchange during AP4 (design simulations). The results will be published in research articles (international peer-reviewed journals).