Dc generator

Abstract

An improved permanent magnet DC generator includes at least one stator arranged normal to a rotor. Preferably, there are a plurality of stators each having successive strata of windings in a first direction, windings in a second direction, and a core comprising a surrounding sheet of magnetizable material. The windings and core are separated by electrical insulation. The stator may be constructed to include recurring patterns of windings and cores as described above, all windings being formed from a continuous conductive filament. A stator is preferably includes a non-conductive base attachable to the generator by threaded fasteners. The rotor includes a pair of diametrically opposed magnet groups. Within each group, there is a leading magnet, a plurality of central magnets, and a trailing magnet. Individual magnets are arranged such that the forward face of the leading magnet, the outer face of the central magnets, and the rear face of the trailing magnet all expose like poles to the stator. A consistent magnetic orientation is thus imposed upon the stator, and parasitic internal losses are thus avoided. The magnets project rearwardly from the rotor, and partly overlap or surround the motor driving the rotor. This helps stabilize the rotor at high rotational speeds. The rotor is potted in epoxy and banded circumferentially with wire to help retain the magnets in place at high rotational speeds.