YASA's New Axial Flux Motor Achieves Unprecedented Power Density, Breaking Records




YASA, a leading innovator in axial flux motor technology, has achieved a groundbreaking milestone, significantly surpassing its prior power density record. This latest achievement, featuring a lighter and more potent prototype, sets a new unofficial world standard, underscoring the company's continuous advancements in electric motor design. This progress is poised to redefine the capabilities of electric powertrains, offering unprecedented efficiency and performance for future vehicles.
YASA's Revolutionary Axial Flux Motor Redefines Electric Powertrain Performance
In a significant announcement, YASA, a company at the forefront of axial flux motor development, has once again shattered its own record for electric motor power density. On October 22, 2025, YASA revealed that its latest axial flux motor prototype achieved an astonishing power density of 59 kW/kg, marking a 40% increase over its previous benchmark set just three months prior. This new prototype, weighing a mere 12.7kg, delivered a short-term peak rating of 750 kW (over 1000 horsepower) during rigorous testing on an advanced dynamometer.
This achievement builds upon YASA's legacy of innovation, which dates back 16 years to its efforts in refining traditional motor designs with cutting-edge materials and components. The result is the axial flux motor, a compelling alternative to the radial motors commonly found in most electric vehicles today. YASA motors have already been successfully integrated into prestigious production vehicles such as the Koenigsegg Regera and the Ferrari SF90 Stradale hybrid. Following Mercedes-Benz's acquisition of YASA in 2021, their axial flux motors first appeared in the Mercedes Vision One Eleven concept in 2023 and were subsequently incorporated into Mercedes-AMG's 800V AMG.EA architecture in late 2024, supporting dual and tri-motor systems.
According to YASA CEO Joerg Miska, the new prototype's power density is three times that of the top radial flux motors currently available. Beyond its impressive peak power, the motor is estimated to deliver a continuous power output in the range of 350-400 kW (469-536 hp). Tim Woolmer, YASA founder and CTO, emphasized that this is not merely a theoretical concept but a tangible, running motor built with scalable materials and processes. Simon Odling, YASA's Chief of New Technology, confirmed that the motor's performance in real-world dyno tests has exceeded even the most optimistic simulations, highlighting its beautiful performance and real-life data validation.
The validation process for this advanced axial flux prototype is currently underway, with YASA promising more details on its development in the near future. This breakthrough signifies a crucial step towards transforming how original equipment manufacturers (OEMs) approach electric powertrain design, offering a vision of highly efficient and compact propulsion systems for the next generation of high-performance automotive applications.
The continuous innovation displayed by YASA in pushing the boundaries of electric motor technology is truly inspiring. This latest record-breaking achievement underscores the immense potential of axial flux motors to revolutionize the electric vehicle industry. As a reporter, witnessing such rapid advancements reinforces the idea that the future of automotive performance and efficiency lies in bold engineering and a relentless pursuit of improvement. This development not only promises more powerful and compact EVs but also encourages a paradigm shift in how we conceive and design electric powertrains. It's a testament to focused engineering innovation, and I eagerly anticipate the widespread adoption of such game-changing technology.