Axial Flux Motor Technology for Electric Vehicles

The development of a new motor design comes with a wide range of engineering challenges. The behavior of the motor must be researched and modeled to obtain a qualitative and manufacturable product design. Simulations are essential in this process to gain technical insights, calculate complex situations and provide guidance in the prediction and validation of physical test results.

Challenges

Our yokeless axial flux technology has been in R&D since 2008. Compared with traditional motor technology, it has a completely different motor topology. The technology goes through an extensive design-for-manufacturing process and evolves into market-ready products, which offer a step change in efficiency, size, reliability, manufacturing resource requirements and cost-effectiveness. This requires extensive research into the optimization and manufacturability of the design in order to obtain a performant, cost-effective and lightweight motor.

In the technology commercialization process (especially with respect to hardware), time to market is crucial. The decision to use simulation is based on our need to speed up the design optimization process and decrease the amount of physical testing needed to validate different design options. The software must be capable of calculating complex solutions concerning electromagnetic, mechanical and thermal behavior.

Technology used

• Ansys Maxwell
• Ansys Mechanical

Engineering solution

• Simulation of the electromagnetic behavior of the motor estimates the efficiency and losses of the design.
• Analysis of the mechanical loads on the motor helps optimize the shape and material of the components.
• Modeling the thermal behavior of the motor determines the heat flux and optimizes the cooling system.

Benefits

Engineering simulations provides insights and figures that would otherwise have to be obtained through extensive physical testing of different design configurations. This not only saves a large amount of time and money. It also allows for a much more in-depth evaluation of the observed behavior. Our goal is to reduce the development time of our motors to only a few months and bring them into mass production via production partners.