JPH097862A - Power consumption device taking advantage of property of vector - Google Patents

Abstract

PURPOSE: To enable magnetic fluxes to cancel effectively each other by a method wherein a magnetic flux induced in a magnetic path when a loading current is made to flow through a secondary coil is restrained from penetrating through a primary coil which gives an inductive electromotive force to the secondary coil. CONSTITUTION: A primary electric circuit is closed, and when an exciting current 10i is made to flow through the primary circuit, a primary magnetic flux 11f interlinked with the primary coil is produced, and the primary electric circuit is balanced in voltage. As a primary magnetic flux 11f penetrates through a secondary coil 2c wound on the leg of a secondary iron core 2m, an inductive electromotive force is produced in the secondary coil 2c. The secondary coil 2c is connected to a load 21 through a switch 2s and a conductor 9, and when the switch 2s is closed, a load current flows through the secondary troll 2c. At this point, the coils wound on both the legs of the secondary iron core 2m are set equal to each other in number of turns, and the secondary coil 2c is so connected as to become negative in mutual inductance. When a load current flows through the secondary coil 2c, a secondary magnetic flux 22x and an offset magnetic flux 22y are induced in opposite directions to each other, so that, the magnetic fluxes cancel each other.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to power devices.

[0002]

2. Description of the Related Art A transformer is an iron core that serves as a path for magnetic flux, a winding that serves as a path for a current that links the magnetic flux, an insulator that insulates them, and a clamp for maintaining their mutual position and mechanical strength. The transformer main body is composed of attached devices. Based on this transformer main body, an oil-filled transformer is housed in a container together with insulating oil that is a cooling medium for enhancing the insulation strength and cooling effect. A dry transformer is composed of a transformer body, auxiliary devices such as a thermometer, a protective frame provided if necessary, and an air cooling device. The winding connected to the AC power supply of the transformer is called the primary coil, and the winding connected to the load side is called the secondary coil. Connect the primary coil to an AC power source and use the primary coil with no load. ing. An iron core is used to effectively pass the magnetic flux. The iron core is layered and finished with a material that has a high magnetic permeability and a small hysteresis coefficient to reduce the exciting current, hysteresis loss, and eddy current loss, and that has an electrical resistance increased by applying an insulating coating on the surface of the thin steel sheet. . Generally, a silicon steel strip is used as the core material, and a directional silicon steel strip in which the easy magnetization direction of the crystal is aligned with the rolling direction, and a non-oriented material manufactured so that the influence of the crystal orientation does not pose a practical problem. There are two types: high-strength silicon steel strip.

[0003]

The direction of the electromotive force E ₂ induced in the coil C ₂ by the electromagnetic induction action is the direction of the coil C ₂
Occurs in the direction to inhibit any changes of magnetic flux [Phi ₀ passing through the by induced electromotive force E _2, a current flows through the coil C _2, the magnetic flux [Phi ₂ is generated in the direction to inhibit any changes of magnetic flux [Phi _0, the magnetic flux [Phi ₀ is canceled Then, the induced power E ₂ disappears. Power cannot be consumed from this electrical circuit. However, like the transformer, if the magnetic flux Φ ₂ is canceled by using the primary load current, it becomes a circuit that can consume power. However, the magnetic flux Φ ₂ causes the primary coil C ₁ to operate either in the normal conduction state or in the superconducting state.
Always pass through in opposite directions, or if they do not always pass through, no primary load current occurs. However, even if the magnetic flux Φ ₂ is canceled without using the primary load current, the circuit is changed to a power consuming circuit. Further, in the conventional transformer, an AC generator is connected to the power supply side, and it is considered that the energy supplied from the outside to this AC power supply is equal to the energy consumed in the secondary side electric circuit. Power is said to be transmitted from the primary side to the secondary side. Rather, it is essentially that the energy consumed in the primary electrical circuit (the energy flowing through the generator's conductors causing the generator to rotate in reverse) is supplied to the alternating current power supply of the primary electrical circuit. Should be considered. Moreover, it should be considered that the two independent electric circuits on the primary side and the secondary side are electromagnetically coupled.

According to the present invention, a magnetic flux generated in a magnetic path when a load current flows through a secondary coil does not penetrate through the primary coil which gives an induced electromotive force to the secondary coil, and efficiently cancels the magnetic flux. The purpose is to get.

[0005]

In the magnetic dipole in the iron rod in a magnetic field, the N pole faces the direction of the magnetic field, so that the iron rod as a whole has an N pole at the end in the magnetic field direction and an S pole at the opposite end. Magnetize to. For this reason, a magnetic field (demagnetizing field) is generated inside the iron bar in the opposite direction to the applied magnetic field. The demagnetizing field is large because the distance between the N and S poles is short when the dimension of the iron rod in the magnetic field direction is short, for example.
Even if such a steel bar has a high magnetic permeability, it is difficult to magnetize. In fact, magnetic flux and magnetic flux density are valid only when this demagnetizing field can be ignored. For example, when a sufficiently long iron rod is magnetized in the direction of its length, when a circular iron core is magnetized, and when there is a void in a part of the iron ring, the demagnetizing field hardly appears. In the case of a circular iron core, the magnetic flux becomes like a ring, but this is called a magnetic circuit.If a closed magnetic circuit with no air in the middle is created, the demagnetizing field does not occur, so the magnetization of the magnetic circuit is weakened. Absent. Miwa Miwa: Physics, Shoryudo Publishing (1939) If there is a gap between the iron core and the iron core of the magnetic circuit, most of the magnetic flux penetrates perpendicularly to the stacking direction of the iron core, but at the end of the void. The magnetic flux fringes, penetrates almost in the stacking direction of the iron core, and a large eddy current flows, and the iron core is unnecessarily heated. In order to prevent this, the end portions of the core are stacked in the stacking direction. Shoji Isobe: Around Electrical Engineering, Development Company (1992) When the iron core does not enter, the external magnetic field changes depending on the winding method of the coil, but when the iron core enters, almost no magnetic flux is emitted to the outside air. (Japan) Japan Electric Association edit: Electric theory (1), (Japan) Japan Electric Association (1981) When iron pieces are attached to magnets, the magnetic lines of force shown by iron powder are very small, and the iron pieces and magnets are surrounded. Has a very weak magnetic force and does not attract other iron pieces. Masato Hara: Theory of Electricity, Keigaku Shuppan (1977) When the above is arranged and considered, the iron core corresponds to the case where the demagnetizing field can be ignored. An iron core without a void in the middle forms a magnetic circuit, and even if a coil is wound around this iron and an electric current is passed through it, magnetic lines of force around the iron core toward the iron core do not occur. Even if there is a gap between the iron core and the iron core in a part of the magnetic circuit, there is no problem that the magnetic flux penetrates the iron core if the iron core end portions are stacked in the stacking direction of the iron core.

When there is one set of primary coils with an iron core, the primary coil C ₁ is wound around an iron core (primary iron core) having a gap so that a magnetic circuit (primary magnetic circuit) can be formed, and an AC power source, a switch, and a primary coil. Connect C ₁ . A closed iron core (secondary iron core) is held between the voids of the primary iron core, and magnetic lines of force are applied to the legs of this iron core (secondary iron core). Since the magnetic lines of force entering the ends of the iron core are fringing, the ends of both the primary and secondary iron cores are stacked in layers in order to prevent eddy currents at the ends of the iron core. Wind the secondary coil around the leg of the closed secondary iron core. In normal state, when the iron core of the two legs, winding the other secondary coil C _{2 'of} the wound legs given magnetic lines secondary coil C ₂ on the other leg, with the same number of turns, the mutual inductance is negative The power supply (secondary coil power supply). In case of 3 legs,
Magnetic lines of force are applied to the central leg, and the secondary coil C ₃ is wound around the central leg to serve as a power supply (secondary coil power supply). In this case, right and left coil _C 3 to the leg of the ', _{C 3} "wound. Coil _{C 3'} and Suitchichi is connected in parallel with the primary coil _{C 1.} Coil _{C 3"} in parallel with the switch also the primary coil _{C 1} Connecting. However, the coil C ₃ ′ and the coil C ₃ ″ have the same number of turns, and are connected in parallel with the primary coil C _{1 so} that the magnetic fluxes generated in the magnetic path when the exciting current flows through the respective coils cancel each other at the central leg. In the superconducting state, in the case of two legs, the secondary coil C _s is wound around the leg to which the magnetic field lines are given to serve as a power source (secondary coil power source), and the hollow cylindrical superconductor coil C _s ′ is wound around the other leg. In any case, connect the power supply (secondary coil power supply), load and switch to form a secondary electric circuit.

[0007]

When the AC power supply (primary power supply), the switch and the primary coil C ₁ are connected and the primary electric circuit is closed, a magnetic flux (primary magnetic circuit) interlinking with the primary coil C ₁ is generated. Therefore, the primary electric circuit is voltage-balanced. Induced electromotive force is generated in the secondary coil wound around the leg of the closed secondary iron core, which is linked to the primary magnetic circuit. When this secondary coil is used as a power source and a load and a switch are connected and this electric circuit is closed, a load current flows. When the load current flows through the secondary coil in the normal conduction state, the magnetic flux (secondary magnetic circuit) is generated in the closed iron core (secondary iron core).
Occurs. In the case of a two-legged iron core, the secondary coil C ₂ and the secondary coil C ₂ ′ interlinking with the magnetic flux (secondary magnetic circuit) have the same number of turns and the mutual inductance is negative, so the magnetic flux is canceled out, Apparently, it does not appear in the magnetic path. For three legs, when the secondary coil C ₃ load current flows, the secondary coil C _{3 'and} the secondary coil C _{3 "and} magnetic flux interlinking (secondary magnetic circuit) appears. Plant, the secondary coil Since both C ₃ ′ and the secondary coil C ₃ ″ are connected in parallel with the primary coil, a current (cancellation current) flows so as to cancel the generated magnetic flux, like the primary load current. Moreover, the secondary coil C ₃ ′ and the secondary coil C ₃ ″
Is connected to the primary coil C _{1 so} that the magnetic fluxes generated in the magnetic path when the exciting current flows in the central leg cancel each other out, the secondary coil C ₃ ′ is based on the current direction of the primary electric circuit.
The directions of the currents (offset currents) flowing through the secondary coil C ₃ ″ and the secondary coil C ₃ ″ are opposite to each other, and the secondary coil C ₃ ′ and the secondary coil C ₃ ″.
It does not flow through the AC power supply (primary power supply). For example, according to an experiment, when only the effective current flows in the secondary coil C ₃ ′, the effective current having the opposite phase flows in the secondary coil C ₃ ″. That is, the direction of the voltage of the AC power supply (primary power supply) Independent of, and in synchronism with the phase of the load current,
Current (offset current) flows. In the superconducting state, when a load current flows through the secondary coil C _s , a magnetic flux (secondary magnetic circuit) is generated in the closed iron core (secondary iron core). Hollow cylindrical superconductor coil C _s' and interlinkage magnetic flux is canceled by the shielding current. In both the normal conduction state and the superconducting state, even if a load current flows, a magnetic flux penetrating the primary coil C ₁ is always generated only from one direction. Therefore, the primary load current flowing through the AC power supply (primary power supply) is not generated.

[0008]

EXAMPLES Examples will be described with reference to the drawings.
1, an iron core serving as a magnetic flux path, a coil serving as a current path that links the magnetic flux, an insulator that insulates them, and a tightening device for maintaining their mutual position and mechanical strength are invented. Among the constituents of the main body, the primary electric circuit, the secondary electric circuit, the iron core and the magnetic flux are illustrated. The primary electric circuit is configured by connecting the AC power supply 1g, the primary coil 1c, and the switch 1s with the conductor 9. The secondary electric circuit is the secondary coil 2
c, the load 21 and the switch 2s are connected by the conductor 9. In the iron core, the end laminated portion 8 is laminated stepwise in the iron core stacking direction so that an eddy current due to fringing does not occur. The secondary core 2m is laminated so that the influence of crystal orientation does not pose a practical problem. The magnetic flux passes in the direction orthogonal to the stacking direction of the iron cores. The magnetic field lines are applied to the legs of the secondary iron core 2 m, and the secondary iron core 2
In order to generate an induced electromotive force in the secondary coil 2c wound around m, one leg of the secondary core 2m is arranged and held in the void portion of the primary core 1m so that the demagnetizing field can be ignored. When the primary electric circuit is closed and the exciting current 10i flows, a magnetic circuit (primary magnetic flux 11f) interlinking with the primary coil 1c is formed,
The primary electrical circuit is voltage balanced. Since the primary magnetic flux 11f penetrates the secondary coil 2c wound around the leg of the secondary iron core 2m, an induced electromotive force is generated in the secondary coil 2c. When the secondary coil 2c is connected to the load 2l and the switch 2s by the conductor 9 and the switch 2s is closed, the load current 2i flows through the secondary coil 2c. When the number of turns of the coil wound around both legs of the secondary iron core 2m is the same and the secondary coil 2c is connected so that the mutual inductance becomes negative, when the load current 2i flows through the secondary coil 2c, Next magnetic flux 22x and offset magnetic flux 22
y and y are generated in the opposite directions, and the magnetic fluxes are canceled by each other, and apparently do not appear in the secondary iron core 2m.

[0009]

When the load current 2i flows through the secondary coil 2c, the magnetic flux (22x and 22x) which is the vector amount generated in the magnetic path.
y) always penetrates the secondary coil 2c from mutually opposite directions. By using the property that the sum of vector quantities of opposite directions and equal in size is always zero in this way, apparently,
The magnetic flux (22x and 22y) generated in the magnetic path does not appear. Since the magnetic flux penetrating the secondary coil is only the magnetic flux (11f) that appears in the magnetic path when the exciting current 10i flows, it is similar to the conventional transformer, and power can be consumed by the secondary electric circuit.
Further, since the magnetic flux penetrating the primary coil 1c from only one direction is not generated at all times, the primary load current flowing through the AC power supply 1g is not generated. Comparing the case where the present invention and the conventional transformer consume the same electric power, the energy supplied is smaller in the present invention by the energy for supplying the primary load current. According to the present invention, the energy consumed in the primary side electric circuit is supplied to the AC power supply of the primary side electric circuit, but the secondary side electric circuit is independent, and the secondary side electric circuit is electromagnetically coupled to the primary side electric circuit. There is no. Therefore, the power consumption in the secondary electric circuit is not restricted by the primary electric circuit.

[Brief description of drawings]

FIG. 1 illustrates a primary electrical circuit, a secondary electrical circuit, an iron core and a magnetic flux.

[Explanation of symbols]

 10i Excitation current 2i Load current 1g AC power supply 2l Load 1m Primary iron core 2m Secondary iron core 1c Primary coil 2c Secondary coil 1s Switchgear 2s Switchgear 11f Primary magnetic flux 22x Secondary magnetic flux 22y Cancellation magnetic flux 8 End laminated part 9 Conductor

Claims (1)

[Claims] 1. A power consuming device for canceling a magnetic flux generated in a magnetic path when a load current flows through the secondary coil without penetrating the primary coil which gives an induced electromotive force to the secondary coil.