Generators and transformers with toroidally wound stator winding
Electrical generators are provided with toroidally wound stator windings electrically connected in series; a high permeability stator core, preferably an amorphous magnetic alloy material, glassy metal or HYPERCO™ 50 laminations; and a rotor. The toroidally wound stator coils and the stator core trap essentially all of the flux fields generated by the stator coils within the stator core. Since there is essentially no magnetic field leaving the stator, there is essentially no flux field interaction with the field generated by the rotor. The reduction of flux field interaction also reduces counter torque.
1. A DC electromagnetic generator device comprising:
a radially magnetized rotor within a radially magnetized toroidal magnetic stator core;
at least one toroidal winding section toroidally wound about at least a portion of said magnetic stator core, and having an output terminal;
an input shaft; and
a permanent magnet mounted to said input shaft for rotating said rotor, said input shaft and said rotor being located substantially within said stator, and whereby a magnetic field generated by said permanent magnet rotor passes through said toroidal winding section and onto said radially magnetized toroidal magnetic stator;
wherein said at least one toroidal winding section extends into one but not both of a north pole or a south pole of said stator's magnet, such that the coils of said stator winding structure are exposed to a moving magnetic flux field of either a north pole or south pole of said rotor at any instant in time such that one or more magnetic flux fields generated by said stator winding extend in the same direction within said stator core, whereby essentially all of the magnetic flux fields generated by the toroidal winding section are confined within said toroidal stator core such that there is essentially no magnetic field leaving the magnetic stator core;
said magnetic stator core, winding section and permanent magnet being configured to generate electrical power.
2. The electromagnetic device as claimed in claim 1 , wherein the device includes exactly one toroidal winding section.
3. The electromagnetic device as claimed in claim 1 , wherein the permanent magnet has an outer region comprising only a north pole, and an inner region comprising only a south pole.
4. The electromagnetic device as claimed in claim 1 , further comprising a shorting coil wound about at least a portion of said magnetic stator core which, upon application of a bias voltage, varies an operational characteristic of the device.
5. The electromagnetic device as claimed in claim 4 wherein one or more diodes are connected to the at least one toroidal winding section and the shorting coil to extract a positive or negative pulse from each coil.