Axial-flux Machines with Ironless Stators for Traction Drives

This article delves into the design and advantages of ironless axial-flux machines, specifically the iPSM (ironless Permanent Magnet Synchronous Machine) developed by Vaionic. The iPSM eliminates frequency-dependent iron losses, resulting in significant efficiency improvements and design flexibility. The modular design allows for easy adjustment of motor power and torque, making it adaptable to a wide range of applications from automotive to wind power. The article also discusses the environmental benefits, including complete and simple recyclability of valuable active components, and the cost-saving potential through reduced active material mass and simpler manufacturing processes. The iPSM's performance and functionality are validated through extensive measurement campaigns and real-world applications, demonstrating its potential as a primary and secondary drive in battery electric vehicles. The article concludes by highlighting the iPSM's advantages in terms of consumption, costs, and driving dynamics, making it a highly flexible and cost-effective system for various traction applications.