In the University of New South Wales in Sydney, a team of researchers-engineers has created an electric motor able to double the maximum rotation speed, increasing the potential of standard permanent-magnet motors. The motor, in fact, can reach rotation speeds exceeding 100,000 RPM and, moreover, the manufacturing method allows decreasing the quantity of necessary rare earths, diminishing the motor’s costs and environmental impact.
One of the consequences of the high rotation speed is the rise of power density, a fundamental factor to achieve excellent performances, taking up little space and weighing less. In the Australian motor the peak power density is about 7 kW per kilogram.
Furthermore, the system has been studied to be scalable and adaptable to manufacturers’ different requirements, and it can be modified at will with a study that lasts about 6-12 months.
Where does the inspiration start from? From a bridge in South Korea.