Abstract: An electric generator assembly is used on a vehicle having a frame and a rotating element, and includes a bracket that is adapted to be fixed to the frame of the vehicle, a support, an electric generator, and an adjusting unit. The support is pivotably mounted to the bracket. The electric generator is mounted on the support and includes a roller that is adapted to be engaged with the rotating element of the vehicle so as to be driven thereby. The adjusting unit is employed to adjust relative positioning between the bracket and the support to engage the roller with the rotating element and release the roller from the rotating element.

Abstract: An electric generator includes at least first and second stator units aligned along a stator axis, and a rotor. Each stator unit includes a stator core having a plurality of angularly spaced-apart coil mounting arms that extend in radial outward directions relative to the stator axis, a plurality of field coils each wound on a respective one of the coil mounting arms, and an insulator unit disposed between the field coils and the stator core so as to provide electrical insulation therebetween while permitting electromagnetic coupling therebetween. The first and second stator units are arranged side by side along the stator axis such that the coil mounting arms of the first stator unit are angularly displaced with respect to the coil mounting arms of the second stator unit. The rotor is coupled rotatably to the first and second stator units for inducing electrical currents in the field coils.