Electric motors

摘要

Electric motors are disclosed with coils which induce a magnetic flux field which by its relationship with ferromagnetic poles provide the motoring force without use of an auxiliary magnetic field. The motors may be employed with fixed or pivotably mounted brushes. Pivotable brushes for electric motor brushes are disclosed.

主权项

1. An electric motor comprising a rotor core and rotor coils disposed around the rotor core, a commutator and a stator, the motor having no auxiliary magnetic field, wherein the rotor coils when energized produce a magnetic field which is misaligned with the central plane of the poles of the stator to produce a torque to turn the rotor core, wherein the magnetic field produced by the rotor coils is the only magnetic field operable to turn the rotor core.