KR20210076825A - Axial field flow rotating machine - Google Patents

Abstract

The present invention relates to a rotating machine, and more specifically, to an axial magnetic flux rotating machine such as an electric motor or a generator using an axial magnetic flux. The present invention provides the axial magnetic flux rotating machine, which comprises: a winding unit (300) in which a plurality of coil windings (310) are disposed in a circumferential direction with respect to a rotation shaft (400); and a magnet assembly which is installed with a gap in the axial direction with respect to the winding unit (300), and includes a plurality of permanent magnets (210) disposed in a circumferential direction with respect to the rotation shaft (400), and a magnet fixing unit (100) to which the plurality of permanent magnets (210) are fixed, and rotates relative to the winding unit (300). The magnet fixing unit (100) includes a hub unit (130), a rim unit (120), and a plurality of connecting units (110) disposed in the circumferential direction and connecting the hub unit (130) and the rim unit (120). The plurality of permanent magnets can be stably supported while minimizing an increase in self-weight.

Description

Axial field flow rotating machine

The present invention relates to a rotating machine, and more particularly, to an axial magnetic flux rotating machine such as an electric motor or a generator using an axial magnetic flux.

An axial magnetic flux rotating device refers to an electric motor or a generator that is configured to rotate and generate power according to a change in magnetic force, which is composed of a disk-shaped rotor and a stator installed with magnets or coils.

As an example of the conventional axial magnetic flux rotating machine, there are Patent Document 1, Patent Document 2, and the like.

Meanwhile, in the conventional axial magnetic flux rotating machine, a plurality of permanent magnets are arranged in a circumferential direction, and the plurality of permanent magnets are fixedly installed in a disk-shaped case.

However, in the conventional axial magnetic flux rotating device, the case in which the permanent magnets are fixedly installed has a problem in that the weight of the case is increased when iron is used.

In addition, in order to solve the problem of the iron material, a method of replacing the case material with a CFRP (carbon reinforced fiber) material is proposed, and there is a problem that it is difficult to sufficiently withstand the centrifugal ◎ applied by the magnets during high-speed rotation of the case.

(Patent Document 1) KR10-1263350 B1

(Patent Document 1) KR10-2019-0020024 A

The present invention, in order to solve the above problems, to provide an axial magnetic flux rotating machine having a magnet support structure that can stably support a plurality of permanent magnets while minimizing an increase in self weight.

The present invention has been created to achieve the object of the present invention as described above, and the present invention includes a winding portion 300 in which a plurality of coil windings 310 are disposed along the circumferential direction with respect to the rotation shaft 400; A plurality of permanent magnets 210 and the plurality of permanent magnets 210 are installed with a gap in the axial direction with respect to the winding unit 300 and arranged along the circumferential direction with respect to the rotation shaft 400 . It includes a fixed magnet fixing part 100, and includes a magnet assembly which rotates relative to the winding part 300, and the magnet fixing part 100, the hub part 130, the rim part 120 and Disclosed is an axial magnetic flux rotating machine, which is disposed in the circumferential direction and includes a plurality of connecting parts 110 for connecting the hub part 130 and the rim part 120 .

The winding part 300 is provided with a plurality of coil windings 310 on the front and rear surfaces in the direction of the rotation axis 400, respectively, and the magnet assembly has air gaps on the front and rear surfaces of the winding part 300, respectively. It can be installed as a pair facing each other.

The hub part 130 has a shaft coupling hole 131 coupled to the rotation shaft 400 , and the hub part 130 of the pair of magnet assemblies may be connected to each other.

The hub part 130 has a protrusion 132 that further protrudes in the axial direction at a position opposite to one end of the plurality of permanent magnets 210 in the radial direction, and the rim part 120 is formed in a radial direction. A rim protrusion 122 that further protrudes in the axial direction is formed at a position opposite to the other end of the plurality of permanent magnets 210, and the plurality of permanent magnets ( 210) may form a seating groove in which they are seated.

The connection part 110 may be installed to simultaneously support one surface of two or more permanent magnets in the circumferential direction.

The thickness of the connection part 110 in the direction of the rotation axis of the rotation shaft 400 may decrease as it goes in the radial direction.

In the plurality of permanent magnets 210 , the angle of the magnetic pole direction formed with respect to the tangential direction along the circumferential direction may gradually increase by 45°.

The plurality of permanent magnets 210 form a set of four each along the circumferential direction, and the magnetic pole directions of the one set of permanent magnets are opposite to each other in the tangential direction in which the magnetic pole directions of the permanent magnets located at both ends are opposite to each other in the middle The two permanent magnets 210 are positioned so that the magnetic pole directions of the permanent magnets 210 at both ends face each other and face upward, and when the magnetic pole directions of the permanent magnets at both ends are opposite to each other, they may be disposed to face downward.

The rotating machine according to the present invention may be an electric motor or a generator.

The rotating machine according to the present invention has the advantage of being able to stably support a plurality of permanent magnets while minimizing an increase in self-weight by adopting a lightweight structure of the magnet fixing part for supporting the permanent magnets.

1 is a perspective view showing the main configuration of a rotating machine according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view of the rotary machine of FIG. 1 .
FIG. 3 is a plan view of the rotating machine of FIG. 1 .
4 is a partial perspective view showing a part of the rotating machine of FIG. 1 .
FIG. 5 is a partial plan view showing a coupling structure of a magnet fixing part and a permanent magnet in the rotating machine of FIG. 1 .
6 is a partial longitudinal sectional view of the rotary machine of FIG. 1 .
7A and 7B are partial longitudinal cross-sectional views showing modified examples of the magnet fixing part of the rotating machine of FIG. 1, respectively.
8A and 8B are conceptual views showing the magnetic pole direction arrangement of the permanent magnets in the rotating machine of FIG. 1 .
FIG. 9 is a conceptual diagram illustrating an arrangement of a winding coil among the winding parts of the rotating machine of FIG. 1 .
10 is a conceptual diagram illustrating an example of a wiring diagram of the winding coil of FIG. 9 .
11 is a perspective view showing an example of a winding coil for an axial magnetic flux rotating machine according to the present invention.
12A to 12C are conceptual views illustrating a state of being wound on a winding jig as a cross-sectional view in the BB direction in FIG. 11 .
13 is a perspective view showing an axial magnetic flux rotating device according to a second embodiment of the present invention.
14 is a perspective view showing the main configuration of the rotating machine of FIG. 13 .
FIG. 15 is an exploded perspective view of the rotary machine of FIG. 13 .
16A is a plan view of the magnet assembly of the rotating device of FIG. 13, and FIG. 16B is a rear view of the magnet assembly of the rotating device of FIG.
17 is a perspective view showing a winding part of the rotating machine of FIG. 13 .
Fig. 18 is a cross-sectional view taken in a direction VII-VII in Fig. 13 .

Hereinafter, an axial magnetic flux rotating device according to the present invention will be described with reference to the embodiments and the accompanying drawings.

The rotating machine according to the present invention, as shown in Figs. 1 to 7b, a plurality of coil windings 310 are disposed along the circumferential direction with respect to the rotating shaft 400, the winding unit 300 and; A plurality of permanent magnets 210 and a plurality of permanent magnets 210 installed along the circumferential direction with respect to the winding unit 300 with a gap in the axial direction, and a plurality of permanent magnets 210 are fixed magnets. It includes a magnet assembly which rotates relative to the winding unit 300 including the fixing unit 100 .

Here, in the rotating machine according to the present invention, various embodiments ( FIGS. 1 to 6 are the first embodiment, FIGS. 13 to 18 are the second embodiment) are possible depending on the structure of the winding unit 300 and the magnet assembly. .

And, as shown in FIG. 13, the rotating machine according to the present invention may include a housing 600 in which the winding unit 300 and the magnet assembly are installed therein.

The housing 600 is a configuration in which the winding part 300 and the magnet assembly are installed inside, and various configurations are possible depending on the installation structure of the winding part 300 and the magnet assembly.

For example, as shown in FIGS. 13, 15 and 17 , the housing 600 is coupled to a first housing 610 and the first housing 610 and includes a winding unit 300 and a magnet assembly. It may include a second housing 620 forming an installation space to be installed inside.

The first housing 610 and the second housing 620 are detachably coupled to each other, and any configuration is possible as long as it forms an installation space so that the winding unit 300 and the magnet assembly are installed therein.

For example, the second housing 620 may have an upper opening, and the first housing 610 may be installed to cover the upper opening of the first housing 620 .

In addition, a first bearing 641 and a second bearing 642 may be installed in the first housing 610 and the second housing 620 so that the rotation shaft 400 may be rotatably installed.

Meanwhile, the rotation shaft 400 is fixedly coupled to a magnet assembly to be described later and is rotatably installed in the housing 600 , and various configurations are possible depending on the magnet assembly and the fixed coupling structure.

For example, as shown in FIGS. 13, 15 and 17 , the rotating shaft 400 includes a first rotating part 420 rotatably coupled to the first housing 610 and a first rotating part ( It may include a second rotating portion 410 coupled to the axial direction with the 420 and rotatably coupled to the second housing 620 .

The first rotating part 410 and the second rotating part 420 are coupled to each other to form a single rotating shaft 400, and as shown in FIG. 15 , fixedly coupled by a coupling bolt 430 . can be

In addition, the first rotating part 410 and the second rotating part 420 may have various configurations according to a fixed coupling structure with a magnet assembly to be described later.

For example, at least one of the first rotating part 410 and the second rotating part 420 is a magnet assembly, in particular, a coupling hub part 411 for coupling with the hub part 130 of the magnet fixing part 100, 421) may be formed.

The coupling hub parts 411 and 421 are respectively extended in the radial direction from the first rotating part 410 and the second rotating part 420 to be coupled with the hub part 130 of the magnet fixing part 100. , may have a circular shape.

And as shown in FIGS. 15 and 18, the coupling hub parts 411 and 421 are a pair of magnet heights when the magnet fixing part 100 is installed as a pair in the top and bottom around the winding part 300. It may be installed between the governments 100 .

Furthermore, the coupling hub parts 411 and 421 may be fixed to each other together with the hub part 130 of the pair of magnet fixing parts 100 by a plurality of coupling bolts (not shown).

Meanwhile, the housing 600 may be coupled to a power connection unit 630 (refer to FIG. 13 ) for supplying and controlling power to the winding unit 300 to be described later from the side, for example.

As shown in FIG. 13 , the power connection unit 630 is a configuration for supplying power to the winding unit 300 , control, and the like, and may be coupled to a side surface of the housing 600 .

Hereinafter, for convenience of description, the first embodiment and the second embodiment will be properly described.

The winding unit 300 is a configuration in which a plurality of coil windings 310 are disposed along the circumferential direction with respect to the rotation shaft 400, and various configurations are possible as a configuration for forming an axial magnetic flux by applying power. .

For reference, in FIG. 2 , the coil winding 310 and the detailed configuration in which the coil winding 310 is installed are not shown for convenience, and various embodiments are possible as shown in FIGS. 12A to 12C .

Meanwhile, the winding unit 300 may be configured by disposing 12 coil windings 310 in 6 phases along the circumferential direction, as shown in FIG. 9 .

At this time, the coil windings 310 constituting the winding unit 300 may be connected in the order shown in FIG. 10 .

Meanwhile, the first end 311 and the second end 312 of each coil winding 310 should be connected to an external power source or connected to another coil winding 310 .

However, the first end 311 and the second end 312 of each coil winding 310 increase the axial length as much as the diameter of the coil terminal according to the drawing direction, thereby unnecessarily increasing the size of the axial magnetic flux rotating device. There is a problem with making

Accordingly, the first end 311 and the second end 312 of each of the coil windings 310 are preferably positioned at the radial end of each of the coil windings 310 in the radial direction around the rotational shaft 400 , in particular on the side surface.

For this purpose, each of the coil windings 310 is preferably wound as shown in FIGS. 12A to 12C .

As shown in FIGS. 12A and 12B , the coil winding 310 wound by the winding method according to the first embodiment is perpendicular to the rotation axis 400 and is wound in n (n is a natural number greater than or equal to 2) layers. a first winding portion 330 having a first end 311 at the outermost portion; The axial winding connected to the innermost end of the first winding unit 330 and wound m (m is a natural number greater than or equal to 2) turns in the axial direction of the rotation shaft 400 is wound up to the n layer forming the rotation shaft 400 and perpendicular to it. It may include a second winding portion 340 having a second end 312 on the outermost side.

The first winding portion 330 is formed perpendicular to the rotation axis 400 and wound in n (n is a natural number greater than or equal to 2) layers, and has a first end 311 at the outermost portion, of the coil winding 310 . is a part

In particular, the first winding part 330 constitutes a part in which the innermost end indicated by -1' → -1 → -2' → -2 ... -4' → -4 is laminated in the radial direction, and the most A first end 311 is formed on the outside.

Meanwhile, the first winding unit 330 is wound in a first winding direction that is a clockwise or counterclockwise direction.

The second winding unit 340 is connected to the innermost end of the first winding unit 330 , and an axial winding wound m (m is a natural number equal to or greater than 2) turns in the axial direction of the rotation shaft 400 is the rotation shaft 400 . ) and the second end 312 at the outermost part after winding up to the n-layer forming perpendicular to it, and is a part of the coil winding 310 .

Here, the second winding part 340 may form an even number of layers in the axial direction, as shown in FIG. 12A , and in this case, 1 → 1' → 2 → 2' → connected to the innermost end indicated by -1' → 3 → 3' ... 5 → 5' → 6 → 6' ... 20 → 20' constitutes a laminated winding part in the axial and radial directions in the order, and is located adjacent to the first end 311 . It may have two ends 312 .

Meanwhile, as shown in FIG. 12B , the second winding part 340 may form an odd number of layers in the axial direction, and in this case, 1 → 1' → 2 → 2' → 3 connected to the innermost end indicated by -1'. → 3' ... 4 → 4' → 5 → 5' ... 16 → 16' to form a laminated winding part in the axial and radial directions in the order, and the second part positioned adjacent to the first end 311 end 312 .

In addition, the second winding unit 340 is wound in the winding direction of the first winding unit 330 , that is, in a second winding direction opposite to the first winding direction, counterclockwise or clockwise.

Meanwhile, other winding methods are possible in that the first end 311 and the second end 312 of the coil winding 310 are positioned laterally among the overall shape.

The coil winding 310 wound by the winding method according to the second embodiment is wound in n (n is a natural number equal to or greater than 2) layers perpendicular to the rotation axis 400 as shown in FIG. a first winding portion 330 having a first end 311; and a second winding portion 340 connected to the innermost end of the first winding portion 330, wound in n-layers in the axial direction of the rotation shaft 400, and having a second end portion 312 at the outermost portion, The first winding portion 330 and the second winding portion 340 form a unit winding portion, and the winding portions are arranged in plural close to each other in the axial direction, and the second end portion of the second winding portion 340 ( 312 may be connected to the first end 311 of the first winding portion 330 of the adjacent winding portion.

The first winding portion 330 is formed perpendicular to the rotation axis 400 and wound in n (n is a natural number greater than or equal to 2) layers, and has a first end 311 at the outermost portion, of the coil winding 310 . is a part

In particular, the first winding part 330 constitutes a part in which the innermost end indicated by 1 → 1' → 2 → 2' ... 4 → 4' is laminated in the radial direction, and the outermost first end ( 311) is achieved.

Meanwhile, the first winding unit 330 is wound in a counterclockwise or clockwise first winding direction.

The second winding portion 340 is connected to the innermost end of the first winding portion 330, is wound in n layers in the axial direction of the rotation shaft 400, and has a second end portion 312 at the outermost portion. , a part of the coil winding 310 .

Here, the second winding part 340 may form an even number of layers in the axial direction, as shown in FIG. 12C , and in this case, -1' → -1 → -2' → - 2 ... -4' → -4 forms a laminated winding in the radial direction, and may have a second end 312 positioned adjacent to the first end 311 .

In addition, the winding unit 300 forms a winding portion in which the first winding portion 330 and the second winding portion 340 are unitary, and the winding portions are arranged in plural close to each other in the axial direction, The second end 312 of the winding portion 340 -indicated as j1-j1 and j2-j2 connected in FIG. 12C - is connected to the first end 311 of the first winding portion 330 of the adjacent winding portion. can be connected

Meanwhile, the second winding unit 340 is wound in the winding direction of the first winding unit 330 , that is, in a direction opposite to the first winding direction, clockwise or counterclockwise.

And, the first end 311 and the second end 312, as described above, is preferably located at the radial end about the axis of rotation 400.

Meanwhile, the winding part 300 corresponds to the permanent magnets 210 installed in the magnet assembly in consideration of the mutual magnetic force action with the magnet assembly to be described later, and a plurality of coil windings 310 are disposed along the circumferential direction.

At this time, the magnet assembly may be installed as a pair on the upper surface and the lower surface with the winding unit 300 as the center in the direction of the rotating shaft 400, in this case, the magnet assembly is on the upper and lower surfaces of the winding unit 300, respectively. They may be installed as a pair facing each other with a gap.

Meanwhile, the winding coil 310 shown in FIGS. 12A to 12C may be formed by winding the coil using a winding jig 500 for winding the winding coil 310 as shown.

The winding jig 500 is a jig for winding a coil to form the winding coil 310 shown in FIGS. 12A to 12C , and any structure is possible as long as it has a structure capable of winding the coil.

In particular, the winding jig 500 preferably has a planar shape similar to the planar shape of the winding coil 310 to be finally formed so as to form a planar shape of the winding coil 310 after winding.

And, for the winding for forming the winding coil 310, a general conductive wire coated with an insulating material may be used, or a Litz wire in which a plurality of conductive wires form one wire may be used.

Meanwhile, the winding structure of the winding unit 300 according to the present invention described with reference to FIGS. 12A to 12C is applicable regardless of the structure of the winding fixing unit 380 for fixing the winding coil 310 .

The winding fixing unit 380 is a configuration for fixed installation of the winding coil 310 and may have a novel structure, and may have a structure as shown in FIGS. 15, 17 and 18 .

Specifically, the winding fixing unit 380 has a winding coil accommodating part 384 corresponding to the outer shape of the winding coil 310 to accommodate the winding coil 310 in the installation position and number of the winding coil 310 . It may be configured to be formed correspondingly.

The winding coil accommodating part 384 is a space for accommodating the winding coil 310 and may be formed in the winding fixing part 380 in a shape corresponding to the outer shape of the winding coil 310 .

Meanwhile, the winding fixing unit 380 should have a structure capable of supporting the winding coil 310 while being fixedly coupled to the housing 600 described above.

Accordingly, the winding fixing part 380, as shown in FIGS. 15, 17 and 18, at least one fixed rim part 381 fixedly coupled to the housing 600, and the outer peripheral surface of the rotating shaft 400, a gap The branch may include an inner hub portion 383 and a connecting portion 386 connecting the fixed rim portion 381 and the inner hub portion 383 to form the winding coil receiving portion 384 .

The inner hub portion 383 is formed to have a gap with the outer peripheral surface of the rotation shaft 400 so as not to interfere with the rotation of the rotation shaft 400 to which the magnet fixing part 100 is fixedly coupled.

The fixed rim portion 381 is a configuration that is fixedly coupled to the housing 600 , and various configurations are possible depending on the coupling structure with the housing 600 .

For example, as shown in FIG. 18 , the fixed rim portion 381 has a stepped portion 381a corresponding to the stepped portions 611a and 621a formed in the housing 600 at the portion coupled to the housing 600 . is formed to maintain a solid coupling state with the housing 600 .

Here, the fixing rim 381 may be fixed to the housing 600 by axial coupling with the first housing 610 and the second housing 620 .

Meanwhile, in the fixed rim portion 381 , an opening 385 may be opened laterally at a portion corresponding to the installation position of each winding coil 310 to facilitate installation of the winding coil 310 .

To this end, the fixed rim portion 381 may be configured as a pair disposed vertically, and may have a structure connected vertically by a connection portion 386 to be described later.

In addition, the fixing rim 381 may have a structure extending up and down to surround the outer peripheral surface of the magnet fixing part 100 of a magnet assembly to be described later.

The connection portion 386 is a configuration that connects the fixed rim portion 381 and the inner hub portion 383 to form the winding coil receiving portion 384, and various configurations are possible.

Specifically, the connection portion 386 may extend from the inner hub portion 383 , support the side surface of the winding coil 310 , and extend outwardly to connect the fixed rim portion 381 .

On the other hand, the winding fixing part 380, the inner hub part 383, the fixed rim part 381, and the connecting part 386 connecting them may be integrally formed, and after installation of the winding coil 310, epoxy or the like is used. It can be integrated by lower molding.

The magnet assembly is installed with a gap in the axial direction with respect to the winding unit 300 , and is configured to rotate relative to the winding unit 300 , and various configurations are possible.

For example, the magnet assembly may include a plurality of permanent magnets 210 disposed along the circumferential direction with respect to the rotation shaft 400 and a magnet fixing unit 100 to which the plurality of permanent magnets 210 are fixed. can

The plurality of permanent magnets 210 are members that form an axial magnetic flux with respect to the plurality of coil windings 310 installed in the winding unit 300 , and various configurations are possible.

For example, the plurality of permanent magnets 210 may be densely arranged along the circumferential direction in a sectoral shape, as shown in FIGS. 2 to 5 .

Meanwhile, the plurality of permanent magnets 210 may have different magnetization directions along the circumferential direction, so as to have a so-called Halbach array.

For example, in the plurality of permanent magnets 210 , as shown in FIG. 8A , the angle of the magnetization direction formed with respect to the tangential direction along the circumferential direction may gradually increase by a certain angle, for example, 45°.

Here, in the arrangement of the magnetization direction, it may be arranged in a set of four each along the circumferential direction, and the permanent magnets constituting each set are larger than the distance between the permanent magnets of another adjacent set and the permanent magnets constituting each set. can be formed.

As another example, the plurality of permanent magnets 210, as shown in FIG. 8b, form a set of four along the circumferential direction, and the magnetic pole direction of the set of permanent magnets is that of the permanent magnets located at both ends. When the magnetic pole directions of the two permanent magnets 210 are opposite to each other in the tangential direction, the magnetic pole directions of the permanent magnets 210 at both ends face each other. If the magnetic pole directions are opposite to each other, it may be arranged to face downward.

On the other hand, in the case of the magnet arrangement shown in FIG. 8b , the magnet fixing part 100 to be described later has a structure in which no opening is formed in the axial direction (only an insertion groove into which permanent magnets are inserted rather than the configuration of the connection part 110 is formed), that is It may have a disk shape.

The magnet fixing part 100 is a configuration in which a plurality of permanent magnets 210 are fixed, and various configurations are possible.

For example, the magnet fixing part 100 includes a hub part 130 , a rim part 120 , and a plurality of connecting parts 110 disposed in the circumferential direction and connecting the hub part 130 and the rim part 120 . Disclosed is an axial magnetic flux rotating device comprising a.

As shown in FIGS. 1 to 7B , the hub part 130 is configured to form a central support structure, such as being coupled to the rotation shaft 400 , and may have a cylindrical shape as a whole.

For example, the hub part 130 may have a shaft coupling hole 131 coupled to the rotation shaft 400 . And when the magnet assembly is configured as a pair, the hub portion 130 of the pair of magnet assembly may be connected to each other.

The rim part 120 is configured to support the other end in the circumferential direction with respect to the permanent magnet 210 as a configuration for forming the circumferential edge of the magnet fixing part 100 .

On the other hand, the hub portion 130 has a protrusion 132 that further protrudes in the axial direction at a position opposite to one end of the plurality of permanent magnets 210 in the radial direction, and in this case, the rim portion 120 is radially A rim protrusion 122 more protruding in the axial direction is formed at a position opposite to the other end of the plurality of permanent magnets 210 , and a plurality of permanent magnets 210 are seated by the protrusion 132 and the rim protrusion 122 . A mounting groove can be formed.

Here, the permanent magnet 210 may be installed in close contact with the protrusion 132 of the hub part 130 in the radial direction or spaced apart from each other.

With the above structure, the plurality of permanent magnets 210 can be stably supported by being disposed in the seating groove formed by the protrusion 132 and the rim protrusion 122 .

The plurality of connection parts 110 are arranged in the circumferential direction and are configured to connect the hub part 130 and the rim part 120 , and various configurations are possible.

The plurality of connection parts 110 are configured to connect the hub part 130 and the rim part 120 to sufficiently withstand the radial centrifugal force of the permanent magnets 210 during rotation, and may be arranged in an appropriate number along the circumferential direction. .

The plurality of connection parts 110 may be arranged in an appropriate number such as three or four, and may be determined as an appropriate ratio to the area of the entire circle when viewed in the axial direction.

The connection part 110 may be installed to simultaneously support one surface of two or more permanent magnets in the circumferential direction, but is not limited thereto.

As shown in FIG. 7A , the thickness of the connection part 110 in the direction of the rotation axis of the rotation shaft 400 may decrease while going outward in the radial direction.

As described above, if the connection part 110 is configured to decrease the thickness of the rotation shaft 400 in the rotation axis direction while going outward in the radial direction, it is possible to reduce the total weight while maintaining structural strength.

And the material of the magnet fixing part 100, in particular, the material of the connection part 110 may have a material of an electrical steel plate.

On the other hand, the permanent magnets 210 installed in the magnet fixing unit 100 are installed with a gap with respect to the winding unit 300 , so there is no need for the permanent magnets 210 to be stably installed in the magnet fixing unit 100 . have.

Accordingly, in the magnet fixing unit 100, as shown in FIG. 7b, the cover unit 160 may be coupled to maintain a constant air gap with respect to the winding unit 300 in the state in which the permanent magnets 210 are installed. have.

The cover part 160 is a configuration in which the magnet fixing part 100 is coupled to the magnet fixing part 100 so that the surface opposite to the winding part 300 can maintain a constant air gap with respect to the winding part 300, Various configurations are possible depending on the coupling structure and material.

As an example, the cover unit 160 is a member for maintaining a constant air gap with respect to the winding unit 300 on the surface of which the magnet fixing unit 100 faces the winding unit 300, and is made of aluminum, plastic, or CFRP. It may have a non-magnetic material such as a film.

At this time, the cover part 160 may be coupled to the magnet fixing part 100 by various methods such as coupling by press-fitting, coupling by welding, coupling by bolting, and the like.

In addition, the cover part 160 may be formed integrally with the magnet fixing part 100, and at this time, the cover part 160 is integrated with the connection part 110, so that it is formed by machining in one member or , can be formed using a mold.

In addition, the cover unit 160 preferably has a structure capable of stably supporting the permanent magnets 210 , and may have various structures such as a disk structure and a can structure.

Meanwhile, when the cover unit 160 is additionally included, the permanent magnets 210 may be installed by various methods.

In particular, after the cover part 160 is coupled to the magnet fixing part 100, the permanent magnets 210 are inserted, or the permanent magnets 210 in the structure in which the cover part 160 and the magnet fixing part 100 are integrated. It is preferable to insert and assemble it. This is because assembly of the permanent magnets 210 is easy, and separation of the permanent magnets 210 can be prevented due to the support of the axial magnetic force with the cover part 160 and the axial reaction force of the cover part 160 .

Meanwhile, in FIG. 7B , reference numerals 172 and 173 denote holes formed through the magnet fixing unit 100 , and may induce air flow to induce cooling of the winding unit 300 .

In addition, reference numeral 171 in FIG. 7B denotes a bolt for coupling a pair of magnet fixing parts 100 arranged vertically around the winding part 300 .

On the other hand, the magnet assembly, particularly the magnet fixing part 100, is different from the structure of the magnet fixing part of the first embodiment shown in Figs. 1 to 7b, the structure as shown in Figs. can have

Specifically, the magnet fixing unit 100 may have various structures for fixing the permanent magnet 210 , and as shown in FIGS. 14 to 18 , one or more for fixing the position of the permanent magnet 210 . The positioning protrusion 140 may have a plate-shaped disk structure installed on the rear surface.

And the magnet fixing part 100, a plurality of ribs 150 may be formed on the upper surface in order to reinforce structural rigidity.

The rotating machine according to the present invention has been described as an example of a configuration including a rotor composed of permanent magnets, that is, a stator composed of a magnet assembly and a winding coil, and may be used as an electric motor or a generator depending on the method.

Since the above has only been described with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention as noted should not be construed as being limited to the above embodiments, and It will be said that the technical idea and the technical idea with the root are all included in the scope of the present invention.

100: magnet fixing part 210: permanent magnet
300: winding part

Claims (9)

a winding unit 300 in which a plurality of coil windings 310 are disposed along the circumferential direction with respect to the rotation shaft 400;
A plurality of permanent magnets 210 and the plurality of permanent magnets 210 are installed with a gap in the axial direction with respect to the winding part 300 and arranged along the circumferential direction with respect to the rotation shaft 400 . It includes a fixed magnet fixing part (100), and a magnet assembly that rotates relative to the winding part (300),
The magnet fixing part 100 includes a hub part 130, a rim part 120, and a plurality of connecting parts 110 disposed in the circumferential direction and connecting the hub part 130 and the rim part 120. Axial magnetic flux rotating machine, characterized in that it comprises. The method according to claim 1,
The winding unit 300, a plurality of coil windings 310 are respectively installed on the front and rear surfaces in the direction of the rotation axis 400,
The magnet assembly is an axial magnetic flux rotating machine, characterized in that it is installed as a pair facing each other with a gap on the front and rear surfaces of the winding unit (300). The method according to claim 1,
The hub part 130 has a shaft coupling hole 131 coupled to the rotation shaft 400 is formed, and the hub part 130 of the pair of magnet assemblies is connected to each other. . The method according to claim 1,
The hub part 130 has a protrusion 132 that further protrudes in the axial direction at a position opposite to one end of the plurality of permanent magnets 210 in the radial direction, and the rim part 120 is formed in a radial direction. A rim protrusion 122 that further protrudes in the axial direction is formed at a position opposite to the other end of the plurality of permanent magnets 210, and the plurality of permanent magnets ( 210) An axial magnetic flux rotating machine, characterized in that it forms a seating groove in which they are seated. 5. The method according to claim 4,
The connecting part 110 is an axial magnetic flux rotating machine, characterized in that it is installed to simultaneously support one surface of two or more permanent magnets in the circumferential direction. 5. The method according to claim 4,
The connecting portion 110, an axial magnetic flux rotating machine, characterized in that the thickness with respect to the rotational axis direction of the rotational shaft 400 decreases while going in the radial direction. 7. The method according to any one of claims 1 to 6,
The plurality of permanent magnets (210), an axial magnetic flux rotating machine, characterized in that the angle of the magnetic pole direction formed with respect to the tangential direction along the circumferential direction gradually increases by 45 °. 7. The method according to any one of claims 1 to 6,
The plurality of permanent magnets 210 form a set of four along the circumferential direction,
The magnetic pole direction of a set of permanent magnets, the magnetic pole directions of the permanent magnets located at both ends are opposite to each other in a tangential direction, and the two permanent magnets 210 located in the middle are the magnetic pole directions of the permanent magnets 210 at both ends. The axial magnetic flux rotating machine, characterized in that it faces upward when facing each other, and is arranged to face downward when the magnetic pole directions of the permanent magnets at both ends are opposite to each other. 7. The method according to any one of claims 1 to 6,
An axial magnetic flux rotating machine, characterized in that it is an electric motor or a generator.

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