Permanent magnet generator with auxiliary winding

DETAILED DESCRIPTION In accordance with the present invention, a generator is adapted to utilize leakage flux to supply control power for electrical components.
More particularly, an improvement in a generator having a rotor, a stator, a magnetic field structure disposed on one of the rotor and the stator wherein the magnetic field structure develops useful magnetic flux in a flux path and a leakage flux in a second flux path and an armature winding disposed on the other of the rotor and the stator in the first flux path comprises an additional armature winding disposed in the second flux path.
The second armature winding and the magnetic field structure are relatively movable and the first-named armature winding and the additional armature winding are not directly connected to one another.
Preferably, the magnetic field structure is disposed on the rotor, the first-named armature winding is disposed on the stator and the additional armature winding is disposed on the same or a different stator.
In an alternate embodiment, the magnetic field structure is disposed on the stator, the first-named armature winding is disposed on the rotor and the additional armature winding is disposed on the same or a different rotor.
Also in accordance with the preferred embodiment, the magnetic field structure comprises a permanent magnet wherein the permanent magnet preferably includes circumferentially directed poles and the useful flux and the leakage flux are axially directed.
In accordance with a further embodiment, the magnetic field structure includes an additional permanent magnet developing flux linking the first armature winding wherein the additional permanent magnet includes circumferentially directed poles and wherein the flux developed by the additional permanent magnet is axially directed.
Further in accordance with this embodiment, the first-named armature winding is disposed on the stator, the first-named permanent magnet is disposed on the rotor and the additional permanent magnet is disposed on an additional rotor