The invention comprises a generator adapted for short armature stroke operation including a stator surrounding an armature, the armature having coils about it in the usual manner and a magnet. The stator has two opposed surfaces of opposite polarity. The armature is propelled through a short stroke from contact with one of the surfaces to contact with the other. Whenever the armature is in contact with one of the surfaces the magnetic field in the armature-stator combination has a complete ferromagnetic path to pass through. The armature stator travels in substantially a straight line. As the armature passes from contact with one to the other of the surface of the stator, the flux through the armature reverses in direction, thereby providing large power gain. The generator can be encapsulated in a flexible jacket for protection from corrosive liquids. A dash dot system can be included so that the generator may accommodate to large semi-steady changes in the forces acting on it.
A method and device for generating electrical energy from the rotation of a wheel of a vehicle is disclosed. The device is disposed within a pneumatic tire and includes a coil housing having an interior chamber with a coil disposed thereabout, which is aligned for receiving a magnet within the chamber. The magnet is mounted within a magnet housing which has a first end aligned for reception in the groove of the coil housing, and a second end in communication with the interior wall of a tire. As the tire rotates, the tire deflection causes relative motion between the magnet and the coil generating electricity.
