Following the development of batteries and, generally, electricity storage, the UK-based firm, Isis Innovation Ltd has developed a new revolutionary electric motor that outperforms the old ones by having the materials and a little of the working principles modified inside them.
Isis is backed up by Oxford University and thus has a lot of potential of driving the best of their engineering talents towards their projects.
This new electric motor features a new topology, having a segmented armature and using different materials developed by Electronic Power Group within the Engineering Department at Oxford. The engineers greatly reduced the motor’s weight and increased its efficiency. Their prototype is made of iron and copper and the overall efficiency goes up to 97%. The new engine also features a reduced torque ripple due to multi phase coil winding.
“These features combine to give a motor that is both lightweight and delivers extremely good power to weight performance. An Oxford motor for automotive application weighed just 13kg but delivers a peak torque of 130Nm (10Nm/kg) and peak power of about 50kW. Simulations show that the same motor is capable of achieving a peak torque of over 200Nm and a peak power of over 150kW. Suitable for high torque applications the technology could be applied to regenerative braking systems within hybrid vehicles for example or wind turbines without the requirement for direct drive gearboxes. A prototype has been built which has matched its modelled characteristics.” (excerpt from the Isis site).
One good application of such a motor is in electric and hybrid vehicles, where mass and efficiency is critical. The higher efficiency would somehow compensate the lacks in battery power, and would improve the cars’ autonomy and power.
For example, Bee Automobiles wants made a prototype race car that uses the Oxford motor in their BRM Bee Four ERV. They will use the car in the British Hill Climb Championship this year. We can hardly wait to see simulated results catching life in everyday cars as soon as possible.