Abstract: There is provided a wheel system for a vehicle, the wheel system comprises a stator, a rotor, a rotational bearing and an inwheel motor. The inwheel motor comprises a motor stator and a motor rotor. The rotor is coupled to the stator via the rotational bearing to rotate about a rotational axis. The motor stator is connected to the stator. The motor rotor is connected to the rotor to cooperate with the motor stator to generate an electromagnetic force to rotate the rotor relative to the stator about the rotational axis. The motor stator has a center defining a central plane extending through the center and perpendicular to the rotational axis. The central plane has an inboard side and an outboard side. In operational use, the inboard side faces toward a center of the vehicle, and the outboard side faces away from the center of the vehicle. The rotor has a mounting surface configured to be connected to a wheel rim. The mounting surface is arranged on the inboard side.

Abstract: There is provided a wheel assembly for a vehicle. The wheel assembly comprises an in-wheel motor, an axle, a first wheel bearing, and a lock nut. The in-wheel motor comprises a stator, a rotor and electromagnets. The stator is fixedly connected to the axle. The stator comprises the electromagnets. The rotor coaxially surrounds the stator. The first wheel bearing is arranged on the axle to rotatably connect the rotor to the axle. The lock nut is arranged on the axle. The axle has an engagement portion that is adapted o engage with an upright of the vehicle. The engagement portion is between the first wheel bearing and the lock nut. The lock nut is arranged to clamp the upright between the first wheel bearing and the lock nut.

Abstract: There is provided an electric motor/generator comprising a stator and a rotor. The stator has an outer perimeter. The rotor at least coaxially encloses the outer perimeter of the stator. The rotor is rotatable relative to the stator around a rotation axis. The rotor and the stator are separated by a flux bearing gap over which in working magnetic flux occurs. The rotor and the stator are separated by a protective gap. The protective gap is configured to close, during a deformation of the rotor, before the flux bearing gap closes, thereby avoiding closure of the flux bearing gap. The motor/generator is characterized in that the stator comprises a roller bearing and an axle. The roller bearing is coupled to the axle and rotatable around the axle. The axle is arranged off-center from the rotation axis. A distance between the roller bearing and the rotor defines the protective gap.