A generator comprises a pair of coaxially aligned rotors including an inner rotor disposed within an outer rotor that combine to form a magnetic field and armature pair. First and second prime movers rotate the rotors in opposite relative directions such that electricity is produced from relative rotation of the magnetic field and armature. First and second flywheels are connected to or integral with the rotors to rotate therewith. Each flywheel has a magnetic circumference. One or more magnetic supports are arranged relative to the circumference to cause at least one vertically acting magnetic force to be exerted on the circumference to support the flywheel's weight. A pair of magnetic stabilisers are arranged on respective opposed lateral sides of each flywheel. The stabilisers cause opposed horizontally acting magnetic forces to be exerted on the flywheel's circumference to impede lateral movement of the flywheel to stabilise the flywheel.
1 . A generator, comprising:
first and second rotors that are coaxially aligned and comprise an outer rotor and an inner rotor, the inner rotor being disposed within the outer rotor, wherein the rotors combine to form a magnetic field and armature pair for generating electricity;
first and second prime movers that are independently connected to the first and second rotors respectively to rotate the rotors in opposite relative directions such that electricity is produced from relative rotation of the magnetic field and armature; and
first and second flywheels connected to or integral with the first and second rotors respectively to rotate with the first and second rotors respectively, wherein a combined weight of the first flywheel and first rotor is substantially equal to a combined weight of the second flywheel and second rotor, and wherein each individual flywheel of the first and second flywheels includes an annular magnet that extends circumferentially around an outer circumference of the individual flywheel, and wherein each individual flywheel is provided with:
one or more magnetic supports arranged relative to the annular magnet to cause at least one vertically acting magnetic force to be exerted on the annular magnet to support a weight of the flywheel; and
a pair of magnetic stabilisers arranged on respective opposed lateral sides of the flywheel, wherein the stabilisers have inwardly positioned surfaces facing the flywheel, wherein magnetic polarities of the surfaces match a magnetic polarity of an outward facing surface of the annular magnet such that the stabilisers cause a pair of opposed magnetic repulsion forces to be exerted on the annular magnet to impede lateral movement of the flywheel to stabilise the flywheel.
2 . The generator according to claim 1 , wherein the stabilisers are mounted on adjustable supports that allow respective positions of the inwardly positioned surfaces to be adjusted relative to the annular magnet to alter respective magnitudes of the repulsion forces.
3 . The generator according to claim 1 , wherein the stabilisers comprise electromagnets.
4 . The generator according to claim 3 , wherein the electromagnets are powered by the electricity generated by the generator.
5 . The generator according to claim 1 , wherein the magnetic supports comprise a first magnetic support disposed underneath the flywheel, wherein a magnetic polarity of the first magnetic support matches a magnetic polarity of the annular magnet such that the annular magnet is repelled from the first magnetic support.
6 . The generator according to claim 5 , wherein the magnetic supports comprise a second magnetic support disposed above the flywheel, wherein a magnetic polarity of the second magnetic support is opposite to the magnetic polarity of the annular magnet such that the annular magnet is attracted to the second magnetic support.
7 . The generator according to claim 5 , wherein the magnetic supports are mounted on adjustable supports that allow respective vertical positions of the magnetic supports relative to the annular magnet to be altered.
8 . The generator according to claim 1 , wherein the first and second rotors comprise respective first and second drive axles, and wherein the first and second prime movers comprise respective first and second drive shafts coupled to the respective first and second drive axles to rotate the rotors in the opposite relative directions.
9 . The generator according to claim 8 , wherein the first and second drive shafts are directly axially coupled to the first and second drive axles respectively.
10 . The generator according to claim 8 , wherein the first and second drive shafts are indirectly coupled to the first and second drive axles respectively by pulley wheel and drive belt arrangements.
11 . The generator according to claim 1 , wherein the outer rotor provides the magnetic field and the inner rotor provides the armature.
12 . The generator according to claim 11 , wherein the generator comprises a slip ring assembly provided on the drive axle of the inner rotor.
13 . The generator according to claim 1 , wherein the generator comprises a slip ring assembly that comprises a pair of conductive rings extending concentrically about a rotational axis of the second of the flywheels.
14 . The generator according to claim 1 , wherein the outer rotor comprises a generally cylindrical hollow drum, and wherein the first of the flywheels is attached to an outward facing surface of the drum.
15 . The generator according to claim 14 , wherein the first of the flywheels comprises an annular disc extending circumferentially about the outwardly facing surface of the drum.
16 . The generator according to claim 14 , wherein the second of the flywheels is attached to a drive axle of the inner rotor and is positioned laterally offset from the drum.
17 . The generator according to claim 1 , wherein the generator comprises a set of permanent magnets connected to the first of the flywheels and a set of field coils connected to the second of the flywheels, wherein relative rotation between the permanent magnets and field coils causes an electrical current to be induced in the field coils.
18 . The generator according to claim 1 , wherein the generator comprises a third rotor, wherein the inner and outer rotors are disposed inside and coaxially aligned with the third rotor, the third rotor being connected to a drive axle of the inner rotor such that the third rotor is rotated by the drive axle with the inner rotor in an opposite relative direction to the outer rotor, and wherein the third rotor and outer rotor combine to form a magnetic field and armature pair for generating electricity.
19 . The generator according to claim 1 , wherein the prime movers comprise a pair of hydraulic turbines.