KR20230129367A - 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 generator using axial magnetic flux. The present invention discloses an axial magnetic flux rotating machine, comprising: a winding unit (300) in which a plurality of coil windings (310) are arranged along a circumferential direction based on a rotational axis (400); and a magnet assembly including a plurality of permanent magnets (210) which are installed with an axial gap with respect to the winding unit (300) and arranged along a circumferential direction based on the rotational axis (400), and a magnet fixing unit (100) to which the plurality of permanent magnets (210) are fixed, and which rotates relative to the winding unit (300), wherein the winding unit (300) includes: a first winding unit (330) which is wound in n (n is a natural number greater than or equal to 2) layers perpendicular to the rotational axis (400), and has a first end (311) at the outermost end; and a second winding unit (340) which is connected to the innermost end of the first winding unit (330) and is wound in the axial direction of the rotational axis (400) m (m is a natural number greater than or equal to 2) turns and then is wound up to m layers perpendicular to the rotational axis (400), and has a second end (312) at the outermost end. Accordingly, the present invention may minimize the increase in axial length due to coil installation, thereby increasing output and minimizing the overall size.

Description

Axial field flow rotating machine}

The present invention relates to rotating machines, and more specifically, to axial magnetic flux rotating machines such as electric motors and generators using axial magnetic flux.

An axial magnetic flux rotating machine refers to an electric motor or generator that generates electricity and is composed of a disk-shaped rotor and stator equipped with magnets or coils and is driven to rotate according to changes in magnetic force.

Examples of conventional axial magnetic flux rotating machines include Patent Document 1 and Patent Document 2.

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

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

In addition, in order to solve the problems of the iron material, a method has been proposed to replace the case material with CFRP (carbon reinforced fiber) material, but there is a problem in that it is difficult to sufficiently withstand the centrifugal force applied by magnets when the case rotates at high speed.

In addition, in the conventional axial magnetic flux rotating machine, a coil having a ring structure as an overall shape is installed, as shown in Patent Document 1, and the terminal of the coil must extend in the radial direction to connect to the outside.

Accordingly, there is a problem of reducing the output by increasing the axial length, especially the air gap, by the diameter of the conductor cross-sectional area of the coil terminal, or unnecessarily increasing the size of the axial magnetic flux rotating device.

(Patent Document 1) KR10-1263350 B1

(Patent Document 1) KR10-2019-0020024 A

The first purpose of the present invention is to provide an axial magnetic flux rotating machine that can increase output and minimize the overall size by minimizing the increase in axial length due to coil installation.

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

The present invention was created to achieve the object of the present invention as described above, and the present invention includes a winding unit 300 in which a plurality of coil windings 310 are arranged along the circumferential direction with respect to the rotation axis 400; A 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 axis 400, and the plurality of permanent magnets 210 are It includes a magnet fixing part 100 that is fixed, and includes a magnet assembly that rotates relative to the winding part 300, wherein the winding part 300 is perpendicular to the rotation axis 400 and n is a first winding section 330 that is wound in layers (a natural number of 2 or more) and has a first end 311 at the outermost portion; The n layer is connected to the innermost end of the first winding unit 330 and the axial winding is wound m (m is a natural number of 2 or more) times in the axial direction of the rotation axis 400 and is perpendicular to the rotation axis 400. Disclosed is an axial magnetic flux rotating machine characterized in that it includes a second winding section 340 having a second end 312 at the outermost end after being wound up to .

The present invention also includes a winding unit 300 in which a plurality of coil windings 310 are arranged along the circumferential direction with respect to the rotation axis 400; A 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 axis 400, and the plurality of permanent magnets 210 are It includes a magnet fixing part 100 that is fixed, and includes a magnet assembly that rotates relative to the winding part 300, wherein the winding part 300 is perpendicular to the rotation axis 400 and n is a first winding section 330 that is wound in layers (a natural number of 2 or more) and has a first end 311 at the outermost portion; It is connected to the innermost end of the first winding part 330, and includes a second winding part 340 that is wound in n layers in the axial direction of the rotation shaft 400 and has a second end 312 at the outermost part. , the first winding part 330 and the second winding part 340 form a single unit winding part, and the winding parts are arranged in plurality in close proximity in the axial direction, and the second winding part 340 ) discloses an axial magnetic flux rotating device, characterized in that the second end 312 of the adjacent winding portion is connected to the first end 311 of the first winding portion 330 of the adjacent winding portion.

The winding direction of the first winding unit 330 and the winding direction of the second winding unit 340 may be in opposite directions.

The first end 311 and the second end 312 may be located at radial ends around the rotation axis 400.

The magnet fixing part 100 includes a hub part 130, a rim part 120, and a plurality of connection parts 110 arranged in the circumferential direction and connecting the hub part 130 and the rim part 120. Disclosed is an axial magnetic flux rotation device comprising:

The magnet assemblies may be installed as a pair facing each other with an air gap on the upper and lower surfaces of the winding unit 300.

The hub portion 130 is formed with a shaft coupling hole 131 coupled to the rotating shaft 400, and the hub portion 130 of a pair of magnet assemblies may be connected to each other.

The hub portion 130 is formed with a protrusion 132 that protrudes further 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 portion 120 is formed in the radial direction. A rim protrusion 122 that protrudes further 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 (122) are formed by the protrusion 132 and the rim protrusion 122. 210) can form a seating groove in which they are seated.

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

The thickness of the connection portion 110 in the direction of the rotation axis of the rotation axis 400 may decrease in the radial direction.

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

The plurality of permanent magnets 210 form a group of four along the circumferential direction, and the magnetic pole directions of the permanent magnets in one set are such that the magnetic pole directions of the permanent magnets located at both ends are tangentially opposite to each other in the middle. The two permanent magnets 210 may be arranged to face upward when the magnetic pole directions of the permanent magnets 210 at both ends face each other, and toward downward when the magnetic pole directions of the permanent magnets 210 at both ends are opposite to each other.

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

According to the first object of the present invention, the rotating machine according to the present invention has a first winding section in which the coil winding is wound perpendicular to the rotation axis with respect to the rotation axis, and a first winding section after being wound several times in the longitudinal direction of the rotation axis. There is an advantage in that the overall size can be minimized by minimizing the increase in axial length by being composed of a second winding section wound in the same layer as the above.

Specifically, in the rotating machine according to the present invention, when forming a coil winding, the end portion of the coil is positioned laterally in the entire coil winding, so that the axial length of the coil winding can be minimized, so the axial length and the distance from the rotor on the side can be minimized. There is an advantage in that the overall size can be reduced by minimizing and the efficiency of the rotating machine can be greatly improved.

According to the second object of the present invention, the rotating machine according to the present invention is capable of stably supporting a plurality of permanent magnets while minimizing the increase in self-weight by adopting a lightweight structure for the magnet fixing part for supporting permanent magnets. There is an advantage.

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

Hereinafter, the axial magnetic flux rotating machine according to the present invention will be described with reference to examples and the attached drawings.

As shown in FIGS. 1 to 7B, the rotating machine according to the present invention includes a winding unit 300 in which a plurality of coil windings 310 are arranged along the circumferential direction with respect to the rotation axis 400; A 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 axis 400, and a magnet to which the plurality of permanent magnets 210 are fixed. It includes a magnet assembly that rotates relative to the winding portion 300 including the fixing portion 100.

Here, the rotating machine according to the present invention is capable of various embodiments (FIGS. 1 to 6 are the first embodiment, FIGS. 13 to 18 are the second embodiment) 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 a winding unit 300 and a magnet assembly are installed inside.

The housing 600 is configured to have the winding unit 300 and the magnet assembly installed inside, and various configurations are possible depending on the installation structure of the winding unit 300 and the magnet assembly.

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

The first housing 610 and the second housing 620 can be of any configuration as long as they are detachably coupled to each other and form an installation space so that the winding unit 300 and the magnet assembly can be installed inside.

For example, the second housing 620 may be open on the upper side, and the first housing 610 may be installed to cover the upper opening of the first housing 620.

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

Meanwhile, the rotation shaft 400 is fixedly coupled to the magnet assembly, which will 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, the rotation shaft 400 includes a first rotation part 420 rotatably coupled to the first housing 610, and a first rotation part ( It is coupled to the axial direction 420 and may include a second rotating portion 410 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 one rotating shaft 400, and as shown in FIG. 15, they are fixedly coupled by a coupling bolt 430. It can be.

In addition, the first rotating part 410 and the second rotating part 420 can have various configurations depending on the fixed coupling structure with the magnet assembly, which will be described later.

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

The coupling hub portions 411 and 421 extend radially from the first rotating portion 410 and the second rotating portion 420, respectively, and are coupled to the hub portion 130 of the magnet fixing portion 100. , may have a circular shape.

And, as shown in Figures 15 and 18, the coupling hub parts 411 and 421 are a pair of magnet fixing parts when the magnet fixing parts 100 are installed in pairs up and down around the winding part 300. It can be installed between governments (100).

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

Meanwhile, the housing 600 may be coupled with, for example, a power connection unit 630 (see FIG. 13) for power supply and control to the winding unit 300, which will be described later from the side.

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

Hereinafter, for convenience of explanation, the first and second embodiments will be mixed and explained appropriately.

The winding unit 300 is a configuration in which a plurality of coil windings 310 are arranged along the circumferential direction with respect to the rotation axis 400, and can be configured in various configurations to form axial magnetic flux by applying power. .

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

Meanwhile, as shown in FIG. 9, the winding unit 300 may be composed of 12 coil windings 310 arranged in 6 phases along the circumferential direction.

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

Meanwhile, the first end 311 and the second end 312 of each coil winding 310 must 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 by the diameter of the coil terminal depending on the drawing direction, thereby unnecessarily increasing the size of the axial magnetic flux rotating device. There is a problem with ordering.

Accordingly, it is preferable that the first end 311 and the second end 312 of each coil winding 310 are located at the radial end portion around the rotation axis 400, especially at the side.

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

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

The first winding part 330 is perpendicular to the rotation axis 400 and is wound in n layers (n is a natural number of 2 or more) and has a first end 311 at the outermost part, and the coil winding 310 It's part of it.

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

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

The second winding unit 340 is connected to the innermost end of the first winding unit 330, and the axial winding is wound m (m is a natural number of 2 or more) times in the axial direction of the rotating shaft 400. ) is wound up to the n layer perpendicular to the layer and then has a second end 312 at the outermost layer, which is a part of the coil winding 310.

Here, the second winding unit 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'. It forms a laminated winding part in the axial and radial directions in the order 3 → 3' ... 5 → 5' → 6 → 6' ... 20 → 20', and is located adjacent to the first end (311). It may have two ends (312).

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

And the second winding unit 340 is wound in the winding direction of the first winding unit 330, that is, in the second winding direction which is 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 in the overall shape.

As shown in FIG. 12c, the coil winding 310 wound by the winding method according to the second embodiment is perpendicular to the rotation axis 400 and is wound in n (n is a natural number of 2 or more) layers at the outermost layer. a first winding portion 330 having a first end 311; It is connected to the innermost end of the first winding part 330, and includes a second winding part 340 that is wound in n layers in the axial direction of the rotation shaft 400 and has a second end 312 at the outermost part, The first winding part 330 and the second winding part 340 form a single unit winding part, and the winding parts are arranged in plurality in close proximity in the axial direction, and the second end of the second winding part 340 ( 312) may be connected to the first end 311 of the first winding part 330 of the adjacent winding part.

The first winding part 330 is perpendicular to the rotation axis 400 and is wound in n layers (n is a natural number of 2 or more) and has a first end 311 at the outermost part, and the coil winding 310 It's part of it.

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

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

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

Here, the second winding unit 340 may form an even number of layers in the axial direction, as shown in Figure 12c, and at this time, -1' → -1 → -2' → - connected to the innermost end indicated by 1. It forms a part of radially laminated windings in the order 2 ... -4' → -4, and may have a second end 312 located adjacent to the first end 311.

In addition, the winding part 300 forms a winding part of one unit including the first winding part 330 and the second winding part 340, and the winding parts are arranged in plurality in close proximity in the axial direction, and the second winding part 300 is formed in a plurality of units. The second end 312 of the winding portion 340—indicated by j1-j1 and j2-j2 being 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 the second winding direction opposite to the first winding direction, clockwise or counterclockwise.

As described above, the first end 311 and the second end 312 are preferably located at the radial ends around the rotation axis 400.

Meanwhile, in the winding unit 300, a plurality of coil windings 310 are arranged along the circumferential direction in correspondence to the permanent magnets 210 installed in the magnet assembly in consideration of the mutual magnetic force effect with the magnet assembly, which will be described later.

At this time, the magnet assemblies may be installed as a pair on the upper and lower surfaces of the winding unit 300 based on the direction of the rotation axis 400. At this time, the magnet assemblies may be installed on the upper and lower surfaces of the winding unit 300, respectively. They can be installed as a pair, facing each other with an air gap.

Meanwhile, the winding coil 310 shown in FIGS. 12A to 12C can be formed by winding the coil using the 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 can have any structure as long as it can wind a 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 achieve the planar shape of the winding coil 310 after winding.

And, as the winding for forming the winding coil 310, a general conductor coated with an insulating material may be used, or a Litz wire in which a plurality of conductors 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 can be applied regardless of the structure of the winding fixing unit 380 for fixing the winding coil 310.

The winding fixing part 380 is a component for fixing the winding coil 310 and may have a novel structure, as shown in FIGS. 15, 17, and 18.

Specifically, the winding fixing part 380 has a winding coil receiving part 384 corresponding to the external shape of the winding coil 310 to accommodate the winding coil 310 in the installation position and number of the winding coil 310. It can be configured to be formed in correspondence.

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 external shape of the winding coil 310.

Meanwhile, the winding fixing part 380 must 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 has a gap between one or more fixing rim parts 381 fixedly coupled to the housing 600 and the outer peripheral surface of the rotating shaft 400, as shown in FIGS. 15, 17, and 18. The branch may include an inner hub portion 383 and a connection 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 rotating shaft 400 so as not to interfere with the rotation of the rotating shaft 400 to which the magnetic fixing portion 100 is fixedly coupled.

The fixing rim portion 381 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 fixing rim portion 381 has a step portion 381a corresponding to the step portions 611a and 621a formed on the housing 600 at the portion where it is coupled to the housing 600. is formed to maintain a firm coupling with the housing 600.

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

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

To this end, the fixing rim portion 381 may be composed of a pair arranged vertically and may have a structure connected vertically by a connection portion 386, which will be described later.

And the fixing rim portion 381 may have a structure extending up and down to surround the outer peripheral surface of the magnet fixing portion 100 of the magnet assembly, which will be described later.

The connecting portion 386 is a component 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 extends from the inner hub portion 383, supports the side of the winding coil 310, and extends outward to connect the fixing limb portion 381.

Meanwhile, the winding fixing part 380 may be formed of an inner hub part 383, a fixing limb part 381, and a connecting part 386 connecting them as one body, and after installing the winding coil 310, epoxy or the like can be used. It can be integrated by molding.

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

As an example, the magnet assembly may include a plurality of permanent magnets 210 arranged along the circumferential direction with respect to the rotation axis 400, and a magnet fixing part 100 to which the plurality of permanent magnets 210 are fixed. You can.

The plurality of permanent magnets 210 are members that form axial magnetic flux for the plurality of coil windings 310 installed in the winding unit 300 and can be configured in various ways.

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

Meanwhile, the plurality of permanent magnets 210 may be arranged in a so-called Halbach array, with different magnetization directions along the circumferential direction.

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

Here, in the arrangement of the magnetization direction, four groups of four can be arranged along the circumferential direction, and the spacing between the permanent magnets in each group from the permanent magnets in other adjacent groups is greater than the spacing between the permanent magnets in each group. can be formed.

As another example, as shown in Figure 8b, the plurality of permanent magnets 210 form a group of four along the circumferential direction, and the magnetic pole direction of one set of permanent magnets is that of the permanent magnets located at both ends. The magnetic pole directions of the two permanent magnets 210 located in the middle are tangentially opposite to each other. When the magnetic pole directions of the permanent magnets 210 at both ends face each other, they face upward, and the magnetic pole directions of the permanent magnets 210 at both ends face upward. If the stimulation directions are opposite to each other, they can be arranged to face downward.

Meanwhile, in the case of the magnet arrangement shown in Figure 8b, the magnet fixing part 100, which will 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 is formed rather than the structure of the connecting part 110), that is, It may have a disk shape.

The magnet fixing part 100 is a structure 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 connection parts 110 arranged in the circumferential direction and connecting the hub part 130 and the rim part 120. Disclosed is an axial magnetic flux rotating device comprising:

As shown in FIGS. 1 to 7B, the hub portion 130 is coupled to the rotation shaft 400 to form a central support structure, and may have an overall cylindrical shape.

For example, the hub portion 130 may be formed with a shaft coupling hole 131 that is coupled to the rotation shaft 400. And when the magnet assemblies are composed of a pair, the hub portion 130 of the pair of magnet assemblies may be connected to each other.

The rim portion 120 forms the circumferential edge of the magnet fixing portion 100 and is configured to support the other end in the circumferential direction with respect to the permanent magnet 210.

Meanwhile, the hub portion 130 is formed with a protrusion 132 that protrudes further in the axial direction at a position opposite to one end of the plurality of permanent magnets 210 in the radial direction. At this time, the rim portion 120 protrudes in the radial direction. A rim protrusion 122 that protrudes further in the axial direction is formed at a position opposite 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 seating groove can be formed.

Here, the permanent magnet 210 may be installed close to or spaced apart from the protrusion 132 of the hub portion 130 in the radial direction.

With the above structure, the plurality of permanent magnets 210 can be stably supported by being placed 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 connect the hub part 130 and the rim part 120, and various configurations are possible.

The plurality of connecting portions 110 connect the hub portion 130 and the rim portion 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 at an appropriate ratio compared to the area of the entire circle when viewed in the axial direction.

The connecting portion 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 connecting portion 110 in the direction of the rotation axis of the rotation axis 400 may decrease as it goes radially outward.

As described above, if the connection portion 110 is configured to decrease in thickness in the direction of the rotation axis of the rotation axis 400 as it moves radially outward, the overall dead weight can be reduced while maintaining structural strength.

And the material of the magnet fixing part 100, especially the connecting part 110, may be an electrical steel sheet.

Meanwhile, the permanent magnets 210 installed in the magnet fixing part 100 are installed with an air gap relative to the winding part 300, so it is necessary for the permanent magnets 210 to be stably installed in the magnet fixing part 100. there is.

Accordingly, the magnet fixing part 100 can be coupled with the cover part 160 so as to maintain a constant gap with respect to the winding part 300 in the state in which the permanent magnets 210 are installed, as shown in FIG. 7b. there is.

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

As an example, the cover part 160 is a member where the surface of the magnet fixing part 100 facing the winding part 300 maintains a constant gap with respect to the winding part 300, and is made of aluminum, plastic, or CFRP. It may have a non-magnetic material such as 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, or coupling by bolting.

In addition, the cover part 160 may be formed integrally with the magnet fixing part 100. In this case, when it is integrated with the cover part 160 and the connection part 110 is formed, it may be formed from a single member by machining. , can be formed using a mold.

The cover part 160 preferably has a structure that can stably support the permanent magnets 210, and may have various structures such as a disk structure or a can structure.

Meanwhile, when the cover part 160 is additionally included, the permanent magnets 210 can 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 are inserted in a structure in which the cover part 160 and the magnet fixing part 100 are integrated. The insert-and-assemble method is preferable. This is because the permanent magnets 210 are easy to assemble and the permanent magnets 210 can be prevented from being separated due to the axial magnetic force with the cover part 160 and the support of the axial reaction force of the cover part 160.

Meanwhile, in FIG. 7B, reference numerals 172 and 173 refer to holes formed through the magnet fixing part 100, which can induce air flow to induce cooling of the winding part 300, etc.

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

Meanwhile, the magnet assembly, especially the magnet fixing part 100, has a structure as shown in Figures 14 to 18, unlike the structure of the magnet fixing part of the rotating machine of the first embodiment shown in Figures 1 to 7b. You can have it.

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

And the magnet fixing part 100 may have a plurality of ribs 150 formed on its upper surface to reinforce structural rigidity.

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

Since the above is only a description of some of the preferred embodiments that can be implemented by the present invention, as is well known, the scope of the present invention should not be construed as limited to the above embodiments, and the scope of the present invention described above Both the technical idea and the technical idea underlying it will be said to be included in the scope of the present invention.

100: Magnet fixing part 210: Permanent magnet
300: winding section

Claims (10)

a winding unit 300 in which a plurality of coil windings 310 are arranged along the circumferential direction with respect to the rotation axis 400;
A 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 axis 400, and the plurality of permanent magnets 210 are It includes a fixed magnet fixing part (100) and includes a magnet assembly that rotates relative to the winding part (300),
The winding unit 300,
a first winding portion 330 that is perpendicular to the rotation axis 400 and is wound in n layers (n is a natural number of 2 or more) and has a first end 311 at the outermost portion;
The n layer is connected to the innermost end of the first winding unit 330 and the axial winding is wound m (m is a natural number of 2 or more) times in the axial direction of the rotation axis 400 and is perpendicular to the rotation axis 400. It includes a second winding section 340 having a second end 312 at the outermost end after being wound up to,
The magnet fixing part 100 includes a hub part 130, a rim part 120, and a plurality of connection parts 110 arranged in the circumferential direction and connecting the hub part 130 and the rim part 120. Includes,
The hub portion 130 is formed with a protrusion 132 that protrudes further 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 portion 120 is formed in the radial direction. A rim protrusion 122 that protrudes further 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 (122) are formed by the protrusion 132 and the rim protrusion 122. 210) forms a seating groove in which the
The connecting portion 110 is an axial magnetic flux rotating device, characterized in that the thickness of the connecting portion 110 decreases in the rotation axis direction of the rotating shaft 400 as it goes in the radial direction. a winding unit 300 in which a plurality of coil windings 310 are arranged along the circumferential direction with respect to the rotation axis 400;
A 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 axis 400, and the plurality of permanent magnets 210 are It includes a fixed magnet fixing part (100) and includes a magnet assembly that rotates relative to the winding part (300),
The winding unit 300,
a first winding portion 330 that is perpendicular to the rotation axis 400 and is wound in n layers (n is a natural number of 2 or more) and has a first end 311 at the outermost portion;
It is connected to the innermost end of the first winding part 330, and includes a second winding part 340 that is wound in n layers in the axial direction of the rotation shaft 400 and has a second end 312 at the outermost part. ,
The first winding section 330 and the second winding section 340 form a single unit winding section,
The winding portion is arranged in plurality in close proximity in the axial direction,
The second end 312 of the second winding part 340 is connected to the first end 311 of the first winding part 330 of the adjacent winding part,
The magnet fixing part 100 includes a hub part 130, a rim part 120, and a plurality of connection parts 110 arranged in the circumferential direction and connecting the hub part 130 and the rim part 120. Includes,
The hub portion 130 is formed with a protrusion 132 that protrudes further 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 portion 120 is formed in the radial direction. A rim protrusion 122 that protrudes further 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 (122) are formed by the protrusion 132 and the rim protrusion 122. 210) forms a seating groove in which the
The connecting portion 110 is an axial magnetic flux rotating device, characterized in that the thickness of the connecting portion 110 decreases in the rotation axis direction of the rotating shaft 400 as it goes in the radial direction. In claim 1 or claim 2,
An axial magnetic flux rotating device, characterized in that the winding direction of the first winding section 330 and the winding direction of the second winding section 340 are opposite to each other. In claim 1 or claim 2,
The first end 311 and the second end 312 are located at radial ends about the rotation axis 400. In claim 1 or claim 2,
The magnet assembly is an axial magnetic flux rotating device, characterized in that the magnet assembly is installed in a pair facing each other with an air gap on the upper and lower surfaces of the winding unit 300. In claim 1 or claim 2,
The hub portion 130 is formed with a shaft coupling hole 131 coupled to the rotation shaft 400, and the hub portion 130 of the pair of magnet assemblies is connected to each other. . In claim 1 or claim 2,
The connection portion 110 is an axial magnetic flux rotating device, characterized in that it is installed to simultaneously support one surface of two or more permanent magnets in the circumferential direction. In claim 1 or claim 2,
An axial magnetic flux rotation device, characterized in that the angle of the magnetic pole direction of the plurality of permanent magnets 210 with respect to the tangential direction gradually increases by 45° along the circumferential direction. In claim 1 or claim 2,
The plurality of permanent magnets 210 form a group of four along the circumferential direction,
The magnetic pole direction of a set of permanent magnets is that the magnetic pole directions of the permanent magnets located at both ends are tangentially opposite to each other, and the two permanent magnets 210 located in the middle have the magnetic pole directions of the permanent magnets 210 at both ends. An axial magnetic flux rotating device characterized in that it is arranged to face upward when facing each other, and to face downward when the magnetic pole directions of the permanent magnets at both ends are opposite to each other. In claim 1 or claim 2,
An axial magnetic flux rotating device characterized in that it is an electric motor or generator.