Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2000-01-31
2001-03-27
Nguyen, Tran (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S166000, C310S168000, C310S180000
Reexamination Certificate
active
06208061
ABSTRACT:
TECHNICAL FIELD
The present invention relates to generators, and particularly to a load-free generator which can maximize the generator efficiency by erasing or eliminating the secondary repulsive load exerted on the rotor during electric power generation.
BACKGROUND ART
The generator is a machine which converts mechanical energy obtained from sources of various types of energy such as physical, chemical or nuclear power energy, for example, into electric energy. Generators based on linear motion have recently been developed while most generators are structured as rotational type generators. Generation of electromotive force by electromagnetic induction is a common principle to generators regardless of their size or whether the generator is AC or DC generator.
The generator requires a strong magnet such as permanent magnet and electromagnet for generating magnetic field as well as a conductor for generating the electromotive force, and the generator is structured to enable one of them to rotate relative to the other. Depending on which of the magnet and the conductor rotates, generators can be classified into rotating-field type generators in which the magnetic field rotates and rotating-armature type generators in which the conductor rotates.
Although the permanent magnet can be used for generating the magnetic field, the electromagnet is generally employed which is formed of a magnetic field coil wound around a core to allow direct current to flow therethrough. Even if a strong magnet is used to enhance the rotational speed, usually the electromotive force produced from one conductor is not so great. Thus, in a generally employed system, a large number of conductors are provided in the generator and the electromotive forces generated from respective conductare serially added up so as to achieve a high electric power.
As discussed above, a usual generator produces electricity by mechanically rotating a magnet (or permanent magnet) or a conductor (electromagnet, electrically responsive coil and the like) while reverse current generated at this time by magnetic induction (electromagnetic induction) and flowing through the coil causes magnetic force which pulls the rotor so that the rotor itself is subjected to unnecessary load which reaches at least twice the electric power production.
FIG. 6
illustrates that the load as discussed above is exerted on a rotor in a rotating-field type generator mentioned above.
Referring to
FIG. 6
, a permanent magnet train
104
is arranged about an axis of rotation
106
such that N poles and S poles are alternately located on the outer peripheral surface of the train. At a certain distance outward from the outer periphery of permanent magnet train
104
, a magnetic induction core
100
is arranged and a coil
102
is wound around magnetic induction core
100
.
As permanent magnet train
104
rotates, the magnetic field produced in the coil by permanent magnet train
104
changes to cause induced current to flow through coil
102
. This induced current allows coil
102
to generate a magnetic field
110
which causes a repulsive force exerted on permanent magnet train
104
in the direction which interferes the rotation of the magnet train.
For example, in the example shown in
FIG. 6
, the S pole of magnetic field
110
faces permanent magnet train
104
. The S pole of permanent magnet train
104
approaches coil
102
because of rotation of permanent magnet train
104
, resulting in the repulsive force as described above.
If reverse current flows in a responsive coil of an armature wound around a magnetic induction core of a generator so that the resulting load hinders the rotor fiom rotating, reverse magnetic field of the armature responsive coil becomes stronger in proportion to the electricity output and accordingly a load corresponding to at least twice the instantaneous consumption could occur.
If electric power of 100W is used, for example, reverse magnetic field of at least 200W is generated so that an enormous amount of load affects the rotor to interfere the rotation of the rotor.
All of the conventional generators are subjected to not only a mechanical primaly load, i.e. the load when the electric power is not consumed but a secondary load due to reverse current which is proportional to electric power consumption and consequently subjected to a load of at least twice the instantaneous consumption.
Such an amount of the load is a main factor of reduction of the electric power production efficiency, and solution of the problem above has been needed.
DISCLOSURE OF THE INVENTION
One object of the present invention is to provide a generator capable of generating electric power with high efficiency by canceling out the secondary load except the mechanical load of the generator, i.e. canceling out the load which is generated due to reverse current of a responsive coil of an armature wound around a magnetic induction core, so as to entirely prevent the secondary load from being exerted.
In short, the present invention is applied to a load-fiee generator including a rotational axis, a first ring magnet train, a second ring magnet train, a first plurality of first magnetic induction primary cores, a first plurality of second magnetic induction primary cores, a first responsive coil, and a second responsive coil.
The first ring magnet train has N poles and S poles successively arranged on an outer periphery of a first rotational orbit about the rotational axis. The second ring magnet train has magnets successively arranged on an outer periphery of a second rotational orbit about the rotational axis at a predetermined distance from the first rotational orbit such that the polarities of the magnets on the second rotational orbit are opposite to the polarities at opposite locations on the first rotational orbit respectively. The first plurality of first magnetic induction primary cores are fixed along a first peripheral surface of the first ring magnet train at a predetermined distance from the first peripheral surface. The first plurality of second magnetic induction primary cores are fixed along a second peripheral surface of the second ring magnet train at a predetermined distance from the second peripheral surface. A first plurality of first coupling magnetic induction cores and a first plurality of second coupling magnetic induction cores are provided in pairs to form a closed magnetic circuit between the first and second magnetic induction primary cores opposite to each other in the direction of the rotational axis. The first responsive coil is wound around the first coupling magnetic induction core. The second responsive coil is wound around the second coupling magnetic induction core, the direction of winding of the second responsive coil being reversed relative to the first responsive coil.
Preferably, in the load-free generator of the invention, the first ring magnet train includes a permanent magnet train arranged along the outer periphery of the first rotational orbit, and the second ring magnet train includes a permanent magnet train arranged along the outer periphery of the second rotational orbit.
Still preferably, the load-fiee generator of the present invention further includes a first plurality of first magnetic induction secondary cores provided on respective outer peripheries of the first magnetic induction primary cores and each having first and second coupling holes, and a first plurality of second magnetic induction secondary cores provided on respective outer peripheries of the second magnetic induction primary cores and each having third and fourth coupling holes. The first coupling magnetic induction cores are inserted into the first and third coupling holes to couple the first and second magnetic induction secondary cores, and the second coupling magnetic induction cores are inserted into the second and fourth coupling holes to couple the first and second magnetic induction secondary cores.
Alternatively, the load-free generator of the present invention preferably has a first plurality of first responsive coils arran
Armstrong Westerman Hattori McLeland & Naughton LLP
Kyung-Soo Kim
Nguyen Tran
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