A MOTOR SUCCESS STORY THAT TURNS ON ITS BEARINGS

摘要

The Delta E-4 Coupe is a stylish 4-seater, 2-door electrically driven coupe that boasts a class-leading range of more than 200 miles on a single charge. The vehicle can accommodate four adults, but the acceleration is comparable to a Porsche 911 Turbo. The key to this impressive performance is the direct-drive electric motor that powers the car. Designed in partnership with Oxford University and Oxford YASA Motors, the new axial-flux design generates well over 600Nm of torque while only weighing 23kg. Delta Motorsport technical director, Nick Carpenter takes up the story: "The bearings were absolutely critical to enabling the modular design of the Yokeless and Segmented Armature (YASA) motor that we helped to design with Oxford. Ultra low energy vehicles such as the E-4 rely on lightweight components to compensate for the inherent problem of the low energy density of lithium batteries when compared to gasoline.