WO2013165208A1

WO2013165208A1 - Coil and rotary machine comprising same

Info

Publication number: WO2013165208A1
Application number: PCT/KR2013/003852
Authority: WO
Inventors: 안행수; 김정숙; 최유심; 최영미
Original assignee: 에스이티주식회사
Priority date: 2012-05-03
Filing date: 2013-05-03
Publication date: 2013-11-07
Also published as: KR101315386B1

Abstract

The present invention relates to a coil and a rotary machine comprising same, and comprises: a rotor comprising a rotary yoke portion, which is formed in a ring shape, and a rotary shaft, which is coupled to the center of the rotary yoke portion; a stator which is formed so as to surround the outside of the rotary yoke portion, and comprises a fixed yoke portion that is installed with a specific distance apart from the rotary yoke portion; and the coil which is wound on the rotary yoke portion and/or the fixed yoke portion, wherein the coil comprises a core wire, a coating which surrounds the core wire and has insulation properties, and a first conductive portion which is formed between the core wire and the coating. According to the coil and the rotary machine comprising same of the present invention, a stable structure that is not easily damaged or deformed can be maintained even under extreme movement conditions, the total weight of the rotary machine can be significantly reduced, and heat generation problems due to iron loss and driving can be resolved by applying a combination of optical fiber and carbon nanotubes instead of a copper wire that comprises the coil in existing rotary machines.

Description

Coil And Rotator With The Same

The present invention relates to a coil and a rotor having the same, and more particularly, a coil provided in a rotor such as a generator having a rotating rotor and converting mechanical rotational force into electrical energy or an electric motor converting electrical energy into mechanical rotational force and a rotor having the same. It is about.

Conventionally, rotors such as generators that convert mechanical rotational energy into electrical energy or electric motors that convert electrical energy into mechanical rotational energy have been devised in various forms.

In the conventional rotor, the stator is composed of a stator core and a coil wound around the core, and a magnet is installed in the yoke to continuously change the magnetic flux density passing through the coil. In order to generate an induced current or vice versa, the rotor is rotated by providing a magnetic field to a magnet or an electromagnet installed in the yoke.

However, the coil wound on the existing stator core uses a relatively thick copper wire, so there is a big problem in that the weight is large but the drop rate is low. In order to increase the spot ratio of the coil, the thickness of the copper wire may be thinned, but as the thickness becomes thinner, breakage of the copper wire may occur in the process of winding the copper wire, and there is a problem of being easily damaged or deformed in an excessive operating environment of the rotor.

In addition, the conventional coil has a problem in that the coil is deteriorated by heat due to heat or iron loss due to the operation of the rotor, the power generation performance is lowered.

The present invention is to solve the conventional problems as described above in the coil is provided in the rotor to form a magnetic field or induced current, in which the optical fiber and carbon nanotubes are combined instead of the conventional copper wire used for the coil In addition to maintaining a stable structure that is not easily damaged or deformed even in an excessive operating environment, it is possible to increase the spot ratio of the coil, to significantly reduce the overall weight of the rotor, and to reduce the heat loss caused by iron loss and driving. It is an object of the present invention to provide a coil that can be eliminated and a rotor having the same.

A coil according to the present invention for achieving the above object is characterized in that it comprises a core wire, a covering surrounding the core wire and having an insulating property, and a first conductive portion formed of a material having electrical conductivity between the core wire and the coating. do.

The first conductive portion is characterized in that it comprises a carbon nanotube.

The first conductive portion is formed by including one or two or more selected from silver, copper, gold, zinc, nickel, chromium, titanium powder having a particle diameter of the micrometer to nanometer.

The core wire is formed of an optical fiber having a core and a cladding surrounding the core.

And a blocking part interposed between the core wire and the first conductive part to insulate the first conductive part and the core wire and to block heat transfer from the first conductive part to the core wire.

A second conductive part including carbon nanotubes is further provided between the core wire and the blocking part.

The rotor according to the present invention for achieving the above object is a rotor including a rotating yoke formed in an annular shape and a rotating shaft coupled to the center of the rotating yoke, and formed to surround the outer side of the rotating yoke and the rotating yoke A stator including a fixed yoke portion spaced apart from each other at a predetermined interval with respect to a portion, and a coil wound around at least one side of the rotating yoke portion or the fixed yoke portion, wherein the coil includes a core wire and the core wire. And a first conductive part formed of a material having electrical conductivity between the core wire and the coating.

A blocking part interposed between the core wire and the first conductive part to insulate the first conductive part and the core wire and to block heat transfer from the first conductive part to the core wire, and a carbon nanotube between the core wire and the blocking part. It characterized in that it further comprises a second conductive portion made.

According to the coil according to the present invention and a rotor having the same, a conductive part flowing through the surface of the carbon nanotube and the conductive powder by applying a combination of the optical fiber, the carbon nanotube and the conductive powder in place of the copper wire forming the coil of the existing rotor The increased cross-sectional area of the battery not only accommodates a large amount of electrical energy, but also maintains a stable structure that is not easily damaged or deformed even in excessive operating environments, and can significantly reduce the overall weight of the rotor, There is an advantage that can solve the heat problem caused by.

1 is an exploded perspective view of the rotor according to the present invention.

FIG. 2 is a cutaway perspective view of the coil shown in FIG. 1. FIG.

3 is an enlarged perspective view of the coil shown in FIG.

4 is a partial cutaway perspective view of a coil according to a second embodiment of the present invention;

5 is a partial cutaway perspective view of a coil according to a third embodiment of the present invention;

6 is a partial cutaway perspective view of a coil according to a fourth embodiment of the present invention;

Hereinafter, a rotor according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a rotor according to the invention. The rotor described below applies an inner rotor type generator structure in which a rotor in which permanent magnets are disposed is installed inside, and the rotor rotates with respect to a stator in which a plurality of coils are disposed to face the permanent magnet.

1 and 2, the rotor 1 according to the present invention includes a rotor 100 and a stator 200.

The rotor 100 includes a plurality of permanent magnets 110 and a rotating yoke portion 120 and the rotating yoke portion 120 formed in an annular shape so that the permanent magnets 110 may be disposed at predetermined intervals along the circumferential direction. Rotation axis 150 is coupled to the center of the.

The rotary yoke unit 120 is disposed adjacent to each other along the circumferential surface of the support yoke 130 fixed to the rotation shaft 150 and the support yoke 130, and is coupled to and detached from the support yoke 130. It includes a plurality of divided yoke 140 formed.

On the outer circumferential surface of the support yoke 130 is a circumference of the support yoke 130 with a plurality of coupling grooves 131 introduced into the center of the support yoke 130 facing the rotation shaft 150 so as to engage and detach the split yoke 140. It is spaced apart along the direction.

Although not shown in the drawing, the coupling groove 131 has a predetermined height at the bottom of the support yoke 130 from the upper surface of the support yoke 130 so that the split yoke 140 to be described later does not escape downward from the support yoke 130. It is formed to a point spaced apart by a dove-tail (dove-tail) structure in which the space is expanded as it is introduced into the inside.

Split yoke 140 is to couple the permanent magnets 110 for providing the magnetic force to the support yoke 130, the permanent magnets 110 are respectively coupled to one side, sliding to the coupling groove 131 on the other side The coupling protrusion 141 is formed to protrude in a shape corresponding to the coupling groove 131. The coupling protrusion 141 also has a length corresponding to the length of the coupling groove 131 is formed.

The split yoke 140 and the support yoke 130 are made of a magnetic material that is magnetized in the same direction as the magnetic pole direction of the permanent magnet 110 when exposed to the magnetic field generated by the permanent magnet (110).

The stator 200 is formed to surround the rotary yoke unit 120 and has a fixed yoke unit 210 installed on the inner circumferential surface to be spaced a predetermined distance from the rotary yoke unit 120, and installed on the rotary yoke unit 120. It includes a coil 250 disposed on one side of the fixed yoke portion 210 to face the permanent magnet 110.

The fixed yoke portion 210 is provided with a main body 220 fixed to the inner circumferential surface of the motor housing provided with a receiving space therein, and detachably coupled to the main body 220, and the coil 250 to be described later with the permanent magnet 110. It includes an iron core 230 located inside the main body 220 to be opposed to.

The main body 220 is formed in an annular shape, and a hollow portion is formed in the center to allow the rotor 100 to enter, and the inner circumferential surface of the hollow portion allows the iron core 230 to be described later to be coupled to the main body 220. 221 extends up and down.

The iron core 230 serves as a passage through which the magnetic force flux passes so that the magnetic force flux generated from the coil 250 can be concentrated and provided to the permanent magnet 110, and is formed in a 'T' shape.

At one end of the iron core 230, a locking projection 231 having a dove-tail structure is formed to correspond to the inlet groove 221 of the main body 220, the other end of the pole 232 is formed in an arc shape It is extended.

The coil 250 is wound around the bobbin 270 and has a core 260, an insulating sheath surrounding the core 260, and a material having electrical conductivity between the core 260 and the sheath 264. The first conductive portion 263 is formed.

The bobbin 270 is formed of an insulating material and has a body 271 having an insertion hole formed therein for inserting the iron core 230 therein, and larger than a diameter of the body 271 at both ends of the body 271. A flange 272 extended to have a diameter.

The core wire 260 may apply any one selected from optical fiber or aramid fiber, carbon fiber, and flon fiber.

The first conductive portion 263 may include carbon nanotubes, or may include metal powder having high electrical conductivity and having a particle size of micrometers to nanometers.

Description of the components constituting the coil 250 will be described in more detail in the following embodiments.

The rotor 1 according to the present invention having the structure as described above has been described as an example applied to a generator for converting mechanical rotational energy into electrical energy, but is not limited to the generator and conversely applied as an electric motor for converting electrical energy into mechanical rotational energy. Of course you can. When the rotor 1 according to the present invention is applied to an electric motor, it may be implemented by applying single-phase or three-phase power to the coil to rotate the rotor. In addition, the present invention can be applied to a coil used in a transformer for raising or lowering a voltage as well as a generator and a motor.

FIG. 3 shows a first embodiment of a coil 250 according to the invention, which is installed in the rotor 1 shown in FIGS. 1 and 2.

The coil 250 includes a core wire 260, a sheath 264 surrounding the outside of the cladding 262, and a first conductive portion 263 formed between the core wire 260 and the sheath 264.

The core wire 260 has an optical fiber including a core 261 and a cladding 262 surrounding the outside of the core 261. The core wire 260 may be an optical fiber, but alternatively, a selected one of aramid fibers, carbon fibers, and flon fibers having a strength equal to or greater than that of metal may be applied.

The first conductive portion 263 has high electrical and thermal conductivity, and includes carbon nanotubes having a strength of 100 times or more than steel of the same thickness. The carbon nanotubes included in the first conductive portion 263 may be formed of a single-walled carbon nanotube (SWNT) or a multi-walled carbon nanotube (MWNT).

Alternatively, the first conductive portion 263 may be formed by mixing with a polymer material such as carbon nanotubes, polyethylene terephthalate (PET), polycarbonate (PC), and the like.

In addition, the first conductive portion 263 is made of graphene (graphene), fullerene (fullerene), or copper (Cu), lead (Pb), silver (Ag), having a particle diameter of the micrometer to nanometer, Gold (Au), platinum (Pt), chromium (Cr), nickel (Ni), palladium (Pd), titanium (Ti) powder may be made of any one or two or more selected. The first conductive portion 263 may be formed by coating the aforementioned metal powder on the outer circumferential surface of the core wire 260.

The sheath 264 is formed to surround the outside of the first conductive portion 263 so that the first conductive portion 263 does not come into contact with each other when the coil 250 is wound around the bobbin 270, and is made of an insulating material. . The sheath 264 is formed thin so that the thickness of the coil 250 can be reduced, and preferably formed of a material having low thermal conductivity.

The coil 250 having the first conductive portion 263 may significantly reduce the weight of the coil in the rotor by combining carbon nanotubes having an electrical conductivity similar to copper to the optical fiber, compared to the conventional copper wire. In addition, since the optical fiber has a thickness almost equal to that of the conventional optical fiber, there is an advantage whether it can be wound more times than using a conventional copper wire.

Meanwhile, as the second embodiment of the coil according to the present invention, the coil 350 may include a first conductive part 363 and a core wire 360 between the core wire 360 and the first conductive part 363 as shown in FIG. 4. Is further provided, and a blocking unit 365 is further provided to block heat from being transferred from the first conductive portion 363 to the core wire 360.

The blocking part 365 is formed of a material having low thermal conductivity and having electrical insulation. For example, the blocking part may be made of a material such as foam rubber, calcium silicate, cork, glass wool, quartz cotton, diatomaceous earth, magnesia powder, calcium silicate pearlite, which are used as a general heat insulating material.

The blocking unit 365 transmits heat generated from the iron core as the operating heat or the direction of the magnetic force changes rapidly as the rotation shaft 150 rotates at a high speed to the inside of the coil 350, that is, the core wire 360. This prevents the coil 350 from being damaged or deformed. Since the existing coils are overlapped with copper wires, heat due to operating heat or iron loss continuously accumulates inside the coil, and it is difficult to discharge the accumulated heat to the outside, thereby degrading the power generation performance of the coil due to deterioration.

On the contrary, the coil 350 of the present invention can transfer heat from the first conductive portion 363 having a high thermal conductivity to the adjacent sheath 364 by the sheath 364 even though the coil 350 is overlapped, so that heat is easily discharged from the inside to the outside. The heat transfer is blocked to the core wire 360 side by the blocking unit 365 to prevent the deformation of the coil 350.

On the other hand, as a third embodiment of the coil according to the present invention, as shown in FIG. 5, the coil is formed of a core wire 460 and a core wire 460 including a core 461 and a cladding 462 surrounding the core 461. The first conductive portion 463 to wrap, the covering 464 surrounding the first conductive portion, the blocking portion 465 formed between the cladding 462 and the first conductive portion 463, and the cladding 462 and the blocking portion 465. It may include a second conductive portion 466 formed.

The second conductive portion 466 is made of carbon nanotubes as described in the first embodiment of the coil 250 described with reference to FIG. 3.

In the coil having the structure described above, the first conductive portion 463 and the second conductive portion 466 are formed in double around the core 461, so that an increase in power generation can be expected, and the first conductive portion 463 and the first conductive portion 463 are formed. Although heat transfer is blocked from the outside of the coil 450 to the inside by the blocking portion 465 formed between the two conductive portions 466, the first conductive portion 463 and the sheath 464 are separated from each other. Through heat transfer is made easy.

On the other hand, Figure 6 shows another embodiment of a coil according to the present invention.

The coil 550 surrounds the insulated core wire 560 and the core wire 560 and has an insulating sheath 564 and a first conductive portion 563 formed of carbon nanotubes between the core wire 560 and the sheath 564. It includes.

The core wire 560 may be an optical fiber, or alternatively, a selected one of aramid fibers, carbon fibers, and flon fibers having a strength equal to or greater than that of metal may be applied.

The first conductive portion 563 may be formed of carbon nanotubes as shown in FIGS. 3 to 5, but alternatively, a metal having excellent conductivity such as copper, lead, silver, and gold is CVD on the outer circumferential surface of the core wire 560. It may be formed by vapor deposition using a technique or by coating the outer peripheral surface of the core wire containing the metal powder as described above.

On the other hand, although not shown in the drawings, the core portion 560 and the first conductive portion 563 may be provided with a blocking portion formed of a material having an insulating property and low thermal conductivity, between the core wire 560 and the blocking portion carbon nano The second conductive part formed of a tube may be further provided.

In the above-described embodiments, the coil has a structure in which one core wire is wound. Alternatively, the coil in which two or more core wires are braided may be applied.

The coil and the rotator having the same according to the present invention described above have been described with reference to one embodiment shown in the drawings, but this is only an example, and those skilled in the art can make various modifications and equivalents therefrom. It will be appreciated that other embodiments are possible.

Therefore, the true technical protection scope of the present invention will be defined by the appended claims.

Claims

Core wire;

A sheath covering the core wire and having insulation;

And a first conductive portion formed of a material having electrical conductivity between the core wire and the coating.
The method of claim 1,

The first conductive portion is a coil, characterized in that formed including carbon nanotubes.
The method of claim 1,

The first conductive part is a coil, characterized in that formed containing one or two or more selected from silver, copper, gold, zinc, nickel, chromium, titanium powder having a particle diameter of micrometer to nanometer.
The method according to any one of claims 1 to 3,

The core wire is a coil, characterized in that formed of an optical fiber having a core and a cladding surrounding the core.
The method according to any one of claims 1 to 3,

A coil further comprising a blocking part interposed between the core wire and the first conductive part to insulate the first conductive part and the core wire and to block heat transfer from the first conductive part to the core wire.
The method of claim 5,

A coil further comprising a second conductive portion formed between the core wire and the blocking portion, including carbon nanotubes.
A rotor including a rotating yoke formed in an annular shape and a rotating shaft coupled to a center of the rotating yoke, and a fixed yoke formed to surround the outer side of the rotating yoke and spaced apart from the rotating yoke at a predetermined interval. In the rotor having a stator and a coil wound on at least one side of the rotary yoke portion or the fixed yoke portion,

And the coil comprises a core wire, a sheath covering the core wire and having an insulating property, and a first conductive part formed of a material having electrical conductivity between the core wire and the sheath.
The method of claim 7, wherein

And the first conductive portion is formed including carbon nanotubes.
The method of claim 7, wherein

The first conductive part is a rotator, characterized in that formed by one or more selected from silver, copper, gold, zinc, nickel, chromium, titanium powder having a particle diameter of micrometer to nanometer.
The method according to any one of claims 7 to 9,

And the core wire is formed of an optical fiber having a core and a cladding surrounding the core.
The method according to any one of claims 7 to 9,

A blocking part interposed between the core wire and the first conductive part to insulate the first conductive part and the core wire and to block heat transfer from the first conductive part to the core wire, and a carbon nanotube between the core wire and the blocking part. Rotor, characterized in that provided with a second conductive portion made.