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A wheel hub motor, hub motor, or in-wheel motor is a motor that is incorporated into the hub of the wheel. Wheel-hub motors are commonly found on electric bicycles. Electric hub motors were well received in early electric cars, but have not been commercially successful in modern production cars [1] [2] because they negatively affect vehicle ...
[citation needed] The lack of spokes or a traditional hub also allows for more space, which can be used to more easily package a hub motor. [ 2 ] While Franco Sbarro was the first to replace vehicles' conventional wheels with hubless wheels in 1989, [ 1 ] monowheels , which are similar in practice, predate Sbarro's hubless-wheel vehicles by ...
The bicycle wheel hub is the motor. The power levels of motors used are influenced by available legal categories and are often, but not always limited to under 750 watts. With a front-drive the motor sits in the front hub, and with a rear-drive the motor sits in the rear hub.
Protean Electric's in-wheel motor is intended to save space on board the vehicle by allowing the drive system to be mounted behind a conventional road wheel and apply torque directly to the wheel and tire. Each of Protean's in-wheel motors can deliver 80 kW (100 hp) and 1250 Nm (935 lb-ft) and weigh 36 kg (75 lbs.). [2]
The design is that of a hub motor with considerable internal gear reduction resulting in low-output RPM hence low measured power. These units were fitted with a unique ignition system whereby the spark-advance curve limited output power to suite the relevant market, usually 500 W for Europe (Sachs 301/A) and 200 W for Australia (Rotary RH-01).
In hybrid electric vehicles, for instance, the electric motor is more efficient at producing torque, or turning power, while the combustion engine is better for maintaining high speed. Improved efficiency, lower emissions, and reduced running costs relative to non-hybrid vehicles are three primary benefits of hybridization.
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These consist of a shaft at the hub, with an external screw thread, a straight external spline section and a tapered interface at the hub base. The wheel centers have internal splines and a matching taper to align and center them on the hub. The wheels are fastened to the hub by means of a winged, threaded nut, called a "knock-off" or "spinner."