Yasa's Axial Flux Motor Achieves Unprecedented Power Density
Yasa, a company based in the UK, has introduced a groundbreaking axial flux electric motor prototype that has established a new, unofficial benchmark in power density. This remarkably lightweight motor, tipping the scales at just 28 pounds, generates an astonishing 1,005 horsepower at its peak, marking a significant 40% improvement over the company's previous record holder. This innovation promises to revolutionize the electric vehicle sector by offering a path towards more efficient and higher-performing powertrains.
The newly developed axial flux electric motor by Yasa recently underwent rigorous testing on a dynamometer. During these tests, the prototype achieved an extraordinary peak power output of 750 kilowatts (equivalent to 1,005 horsepower). What makes this achievement particularly remarkable is its mass: at only 12.7 kilograms (28 pounds), the motor boasts an unparalleled power density of 59 kW per kilogram. This figure significantly outperforms Yasa's previous record-holding motor, which delivered 550 kW (737 hp) at a weight of 13.1 kg (28.8 lbs), resulting in a power density of 42 kW/kg. In comparison, this compact yet potent motor is nearly four times more powerful than the rear electric motor found in the Tesla Model Y Standard, which produces 200 kW (268 hp) in Europe, and even surpasses the combined output of two Tesla Model 3 Performance vehicles, each rated at 460 hp.
Beyond its impressive peak power, the continuous power output of this motor is equally critical. Yasa's prototype is designed to sustain an output of 350 to 400 kW (469 to 536 hp) continuously, a feature vital for consistent performance in various driving conditions, not just short bursts of acceleration. This sustained power capability, combined with its lightweight design, suggests significant advantages for electric vehicles. Lighter motors contribute to an overall reduction in vehicle weight, which in turn can lead to greater driving range with smaller battery packs and faster charging times.
Joerg Miska, Yasa's CEO, emphasized that this record-breaking achievement underscores the company's distinctive capabilities. He highlighted that the motor's performance density is three times that of current leading radial flux motors, pushing the boundaries of electric motor engineering. The technology relies on readily available materials, ensuring that it can be mass-produced efficiently once market demand rises. This strategic choice of materials and scalable design makes the advanced axial flux motor a viable and impactful solution for the broader automotive industry.
Currently, Yasa's axial flux motors are integrated into high-end automotive applications, such as the Lamborghini Temerarior and Ferrari 296 GTB, where they complement combustion engines to deliver enhanced performance. Furthermore, concepts like the Mercedes-AMG GT XX, an anticipated all-electric super grand tourer, plan to utilize three Yasa axial flux motors to achieve a combined output exceeding 1,000 kW (1,360 hp). Historically, innovative technologies often debut in luxury segments before becoming more accessible. The expectation is that Yasa's axial flux motors will follow a similar trajectory, eventually becoming standard in more mainstream electric vehicles as production scales and costs decrease, thereby democratizing high-performance, efficient electric propulsion.