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AssigneeEtat Francais
InventorsJacques A. Saint-Michel, Jean-Pierre Chabrerie, Alain Mailfert
Estimating the term…
In a rotating machine, for example heteropolar, auxiliary poles (14) are placed in practically the field poles (4) and close to the peripheral of a salient section (.delta.) of rotor (2), the same azimuth symmetry plane as the poles are supplied by a current (i) regulated by a power supply and auxiliary regulation device (16), the armature current (I) and rotation speed (N) of the rotor expose armature conductors (8) in commutation to an equalizing flux providing for arc-free commutation. Auxiliary poles can be supplied with a current regulated by the field current to cancel the currents flowing in the armature conductors on the field poles. These machines, for example also acyclic with voltage step-up, have high specific power and efficiency, and can be employed for example, in electric traction or propulsion.
A direct current electrodynamic machine comprising a stator and a rotor, said stator containing a ferromagnetic frame defining an internal cylindrical housing for said rotor, at least one field winding, at least one field pole with a radially symmetric axis, said rotor containing a plurality of armature conductors linked at one end of said rotor to a collector ring device, said ring device cooperating with at least one sliding contact arranged on said stator near said field pole, said field pole having at one axial end at least one auxiliary pole arranged in the same radially symmetric plane and at substantially the same radius as said field pole, said auxiliary pole being supplied a current regulated by at least one operating current of said machine.
Dependencies are inferred from the claim text.