The most prominent features of the motor are its high power and torque density and its light weight. The prototype consists of a motor with integrated reduction gears and an oil cooling system. By leveraging the technology developed for the soon-to-be-mass-produced E-Axle, a single in-wheel motor can achieve a power output of over 100 kW (135 PS)—equivalent to a 1,800 cc class gasoline engine—while weighing only 32 kg and being compact enough to fit inside a 20’’ wheel. The motor is compatible with all of the common car layouts: RWD, FWD and 4WD.
While regular EV traction motors generally occupy the engine compartment, in-wheels are incorporated directly into the wheels of the automobile. Benefits of this set-up include higher efficiency as a result of driving the wheels directly and bypassing the need for conventional power transmission mechanisms. In turn, this allows for lighter and more compact designs. Additionally, independent control of the wheels opens up the possibility of making further improvements to electronic stability control (ESC) and traction control systems (TCS).
The company aims to start mass-producing the motor around 2023.
More information: https://www.nidec.com/en-Global/