WO2022010020A1 - Pole piece for magnetic gear, method for manufacturing same, magnetic gear comprising same, and propulsion module comprising same - Google Patents

Abstract

A pole piece for a magnetic gear according to an embodiment of the present invention is disposed between an inner magnetic flux part and an outer magnetic flux part to control magnetic flux, the inner magnetic flux part having a plurality of permanent magnets coupled to an outer circumferential surface of a rotating body formed around a first axis, the outer magnetic flux part having a plurality of permanent magnets coupled to an inner circumferential surface while being coaxial with the inner magnetic flux part. The pole piece for a magnetic gear may comprise: an intermediate part interposed between the inner magnetic flux part and the outer magnetic flux part and having a plurality of mounting holes formed therethrough to be spaced apart from each other by a predetermined distance; and a magnetic part inserted into each of the plurality of mounting holes, wherein the intermediate part includes a plurality of intermediate pieces stacked along the direction of the first axis, and the plurality of intermediate pieces are stacked such that the magnetic part inserted into each of the mounting holes forms a skew angle along the direction of the first axis.

Description

Pole piece for magnetic gear, manufacturing method thereof, magnetic gear including same, and propulsion module including same

The present invention relates to a pole piece for a magnetic gear, and more particularly, an inner magnetic flux part to which a plurality of permanent magnets are coupled to an outer peripheral surface of a rotating body formed with respect to a first axis, and a plurality of permanent magnets coaxial with the inner magnetic flux part, on the inner peripheral surface It relates to a pole piece for a magnetic gear disposed between the outer magnetic flux portions to which magnets are coupled to control magnetic flux, a method for manufacturing the same, a magnetic gear including the same, and a propulsion module including the same.

In general, a magnetic gear is a non-contact gear device that transmits power in a non-contact manner using magnetic force, unlike a contact gear that transmits power by physical contact. It is a gear device with excellent stability and durability as it does not require maintenance or inspection and has no mechanical friction.

Furthermore, since the magnetic gear can reduce energy loss, it is a gear device capable of high-efficiency driving compared to the contact-type gear and accurate peak torque transmission.

And the conventional magnetic gear, if it is a configuration using a magnetic method, various configurations are possible. For example, an inner rotor and an outer rotor to which a permanent magnet is coupled, and a magnetic body are installed at regular intervals and located between the inner rotor and the outer rotor. By adjusting the magnetic flux, it may be configured to include a pole piece that induces rotation of the other through rotation according to the input rotation of any one of the inner rotor and the outer rotor.

Prior art literature: Korean Patent No. 10-1457523

An object of the present invention is to provide a pole piece for magnetic gear, which is easy to manufacture and can significantly reduce manufacturing cost by laminating a pole piece composed of a permanent magnet and a core between an inner magnetic flux part and an outer magnetic flux part in the axial direction, and the To provide a manufacturing method, a magnetic gear including the same, and a propulsion module including the same.

The pole piece for magnetic gear according to an embodiment of the present invention is coaxial with an inner magnetic flux part to which a plurality of permanent magnets are coupled to an outer peripheral surface of a rotating body formed with respect to a first axis, and a plurality of permanent magnets on the inner peripheral surface. In the pole piece for magnetic gear disposed between the outer magnetic flux part to which magnets are coupled to control magnetic flux, a plurality of mounting holes are formed between the inner magnetic flux part and the outer magnetic flux part and penetrated at a predetermined distance It includes an intermediate part and a magnet part inserted into the plurality of mounting holes, wherein the intermediate part has a plurality of media pieces stacked in the first axial direction, and the plurality of media pieces are inserted into the respective mounting holes. The used magnet parts may be stacked to form a skew angle along the first axial direction.

The magnet portion of the pole piece for magnetic gear according to an embodiment of the present invention includes a first opposing surface facing the outer magnetic flux portion, a second opposing surface facing the inner magnetic flux portion, and the first opposing surface and the first opposing surface A connection surface connecting two opposite surfaces may be provided, and a width of the first opposed surface may be greater than a width of the second opposed surface.

The magnet portion of the pole piece for magnetic gear according to an embodiment of the present invention, an edge opposite to the outer magnetic flux portion and an edge opposite to the inner magnetic flux portion may be formed in a round shape.

The intermediate portion of the pole piece for magnetic gear according to an embodiment of the present invention includes a first medium piece and a second medium piece laminated on one side of the first medium piece, and the first medium piece is penetrated through A first fastening hole formed, a first recessed groove formed by being depressed, and a first connection hole formed to be penetrated, wherein the first fastening hole, the first recessed groove and the first connection hole include a plurality of first coupling holes. The first mounting holes are alternately formed along the first direction in the spaced apart space, and the second medium pieces include a second fastening hole that is penetrated and formed, a second recessed groove that is formed by being depressed, and a second connection hole that is formed through penetration. and wherein the second connection hole, the second recessed groove, and the second fastening hole are alternately formed along the first direction in the spaced apart space of the plurality of second mounting holes, the first fastening hole and The second connection hole is disposed to overlap in the first axial direction, and the first recessed groove and the second recessed groove are disposed to overlap in the first axial direction, and the first connection hole and the second recessed groove are disposed to overlap in the first axial direction. The two fastening holes may be disposed to overlap in the first axial direction.

The intermediate part of the pole piece for magnetic gear according to an embodiment of the present invention is inserted into the first fastening hole and the second connection hole at the same time to connect the first intermediate piece and the second intermediate piece It further includes a connection part, wherein the first fastening hole passes through the first radius part and the first radius part recessed in a first radius from the other side of the first medium piece, but with a second radius smaller than the first radius Consists of a recessed second radius portion, wherein the first connection portion is connected to a first head portion formed in a shape corresponding to the first radius portion and the first head portion, and has a shape corresponding to the second radius portion It may be composed of a first cylindrical portion formed of.

The intermediate portion of the pole piece for magnetic gear according to an embodiment of the present invention is inserted into the first and second depression grooves at the same time to connect the first intermediate piece and the second intermediate piece. It further includes a connection part, wherein the first recessed groove is, the first 1-1 recessed piece formed by recessing from the other side of the first intermediate piece, and the 1-2 recessed piece formed by recessing from one side of the first medium piece and, wherein the second recessed groove is recessed from the other side of the 2-1 recessed piece and the second medium piece formed by being recessed from one side of the second medium piece opposite to the one side of the first medium piece, It includes a 2-2 impregnated piece to be formed, wherein the second connection part is at the same time as the 1-2 impregnated piece and the 2-1 impregnated piece when the first intermediate piece and the second intermediate piece are laminated. It can be inserted to connect the first medium piece and the second medium piece.

In the second connection part of the pole piece for magnetic gear according to an embodiment of the present invention, when the first intermediate piece and the second intermediate piece are stacked, the 1-2 impregnated piece and the 2-1 impregnated piece are It is formed in a shape corresponding to the space to be formed, and the 2-1 dimpled piece and the 2nd 2nd dimpled piece may be provided to be shifted to form the skew angle.

The intermediate portion of the pole piece for magnetic gear according to an embodiment of the present invention further includes a third connecting portion connecting the cover member covering the intermediate portion and the first intermediate piece, wherein the third connecting portion includes the cover It is simultaneously inserted into the cover hole formed in the member and the first connection hole, and the second fastening hole passes through the third radius portion and the second radius portion which are recessed in a first radius from one side of the second medium piece, It consists of a fourth radius portion recessed into a second radius smaller than the first radius, and the intermediate portion further includes a third medium piece laminated on the other side of the second medium piece, the third medium piece passing through and a third fastening hole formed by being depressed, a third recessed groove formed by being depressed, and a third connecting hole formed through, wherein the intermediate part is simultaneously inserted into the second fastening hole and the third connecting hole, the It further includes a fourth connection part for connecting the second medium piece and the third medium piece, wherein the fourth connection part includes a second head portion and the second head portion formed in a shape corresponding to the third radius portion; It may be connected to a second cylindrical portion formed in a shape corresponding to the fourth radius portion.

The connection surface of the pole piece for magnetic gear according to an embodiment of the present invention has a protrusion formed to protrude, the mounting hole is formed to have a shape corresponding to the magnet portion, and the protrusion includes the magnet It is possible to prevent the part from being separated from the mounting hole.

In the method of manufacturing a pole piece for magnetic gear according to an embodiment of the present invention, an inner magnetic flux portion to which a plurality of permanent magnets are coupled to an outer peripheral surface of a rotating body formed with respect to a first axis and a plurality of inner magnetic flux portions coaxial with the inner peripheral surface In the method of manufacturing a pole piece for a magnetic gear disposed between the outer magnetic flux portions to which the permanent magnets are coupled to control magnetic flux, a plurality of first medium pieces having a plurality of mounting holes formed through and formed in an annular shape are provided. A first step of preparing, a second step of mounting a permanent magnet in a plurality of mounting holes of the first medium piece, a third of preparing a plurality of second medium pieces having a plurality of mounting holes formed through and formed in an annular shape Step, a fourth step of mounting a permanent magnet in the plurality of mounting holes of the second medium piece, and a fifth step of alternately stacking the first medium piece and the second medium piece, the stacked first sheet The piece and the second medium piece may be stacked so that a magnet inserted into each mounting hole forms a skew angle along the first axial direction.

In the first step of the method for manufacturing a pole piece for magnetic gear according to an embodiment of the present invention, a first fastening hole formed through the first medium piece, a first recessed groove formed by being depressed, and a penetrating portion are formed. Further comprising the step of processing the first connection hole, wherein the third step is, a second fastening hole formed through the second medium piece, a second recessed groove formed by being depressed, and a second connection formed through the second medium piece Further comprising the step of machining a hole, wherein the fifth step, the first connecting portion is inserted into the first fastening hole and the second connecting hole at the same time to connect the first medium piece and the second medium piece The step of mounting and being simultaneously inserted into the first recessed groove and the second recessed groove, it may further include the step of mounting a second connecting portion connecting the first intermediate piece and the second intermediate piece.

In the magnetic gear according to an embodiment of the present invention, an inner magnetic flux portion to which a plurality of permanent magnets are coupled to an outer circumferential surface of a rotating body formed with respect to a first axis, coaxial with the inner magnetic flux portion and a plurality of permanent magnets coupled to the inner circumferential surface It may include a housing for rotatably supporting the outer magnetic flux unit, the pole piece according to any one of claims 1 to 9, and an inner axis of rotation of the inner magnetic flux unit and an outer axis of rotation of the outer magnetic flux unit.

A propulsion module according to an embodiment of the present invention includes a rotational force generating unit for generating a rotating force, a magnetic gear according to claim 12, wherein the rotating force generating unit is connected to any one of the inner rotating shaft and the outer rotating shaft, and the magnetic gear A first propeller that is rotated to generate thrust while connected to any one of the inner rotation shaft and the outer rotation shaft of It may include a thrust generating unit having two propellers.

According to the present invention, manufacturing is easy and manufacturing cost can be significantly reduced by stacking a pole piece composed of a permanent magnet and a core between the inner magnetic flux part and the outer magnetic flux part in the axial direction.

1 is a schematic cross-sectional perspective view showing a magnetic gear according to an embodiment of the present invention.

Figure 2 is a schematic cross-sectional view for explaining a magnetic gear pole piece according to an embodiment of the present invention.

3 to 6 are schematic views for explaining a magnetic gear pole piece according to an embodiment of the present invention.

7 and 8 are schematic views for explaining the propulsion module according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, delete, etc. other elements within the scope of the same spirit, and may use other degenerative inventions or the present invention. Other embodiments included within the scope of the present invention may be easily proposed, but these will also be included within the scope of the present invention.

In addition, components having the same function within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

1 is a schematic cross-sectional perspective view illustrating a magnetic gear according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view for explaining a pole piece for a magnetic gear according to an embodiment of the present invention.

1 and 2, in the magnetic gear pole piece 1 according to an embodiment of the present invention, the inner magnetic flux in which a plurality of permanent magnets are coupled to the outer circumferential surface of the rotating body formed with respect to the first axis L. It is disposed between the part 2 and the outer magnetic flux part 3 coaxial with the inner magnetic flux part 2 and to which a plurality of permanent magnets are coupled to the inner circumferential surface to control the magnetic flux.

The magnetic gear pole piece 1 of the present invention may include an intermediate part 10 and a magnet part 20 .

The intermediate portion 10 may be interposed between the inner magnetic flux portion 2 and the outer magnetic flux portion 3, and a plurality of mounting holes H passing therethrough at a predetermined distance may be formed.

The magnet unit 20 may be a kind of permanent magnet inserted into the plurality of mounting holes (H).

The intermediate part 10 may include a plurality of intermediate pieces stacked along the first axial direction.

The plurality of media pieces may be stacked so that the magnet part 20 inserted into each mounting hole H forms a skew angle A along the first axial direction.

The skew angle (A) is a predetermined skew angle (A) with respect to the magnet part 20 inserted into the adjacent mounting hole (H) while going in the first axial direction, the circumferential length of the permanent magnet; It may have various values according to the length of the first axial direction, the arrangement number, and the like.

The skew angle A is set to increase in one direction while going in the axial direction to reduce torque ripple, and various configurations are possible.

As described above, it was confirmed through analysis that when an appropriate skew angle (A) was placed in the arrangement of the magnet unit 20 , the torque was decreased while the torque ripple was greatly reduced.

3 to 6 are schematic views for explaining a pole piece for a magnetic gear according to an embodiment of the present invention.

3 to 6 , the magnet part 20 of the pole piece 1 for magnetic gear according to an embodiment of the present invention has a first opposing surface 21 facing the outer magnetic flux part 3 . , a second opposing surface 22 facing the inner magnetic flux portion 2 and a connection surface 23 connecting the first opposing surface 21 and the second opposing surface 22 may be provided.

A width of the first opposing surface 21 may be greater than a width of the second opposing surface 22 .

Specifically, the polarity ratio of the magnet unit 20 means the ratio of the polar polarization angle and the polar polarization angle, which is the maximum angle that the permanent magnet can occupy when considering the number of poles of the rotor.

In terms of output and efficiency, it is to install a permanent magnet as much as possible at the polar angle, but this becomes an obstacle to reducing the cogging torque. Accordingly, in order to reduce the cogging torque by minimizing the air gap permeance function, the length of the first opposing surface 21 and the length of the second opposing surface 22 are relatively set.

The magnet part 20 may be formed in a round shape with a corner opposite to the outer magnetic flux part 3 and an edge opposite to the inner magnetic flux part 2 .

Specifically, since the coking torque is generated by the change amount of the air gap energy, the cogging torque can be reduced by reducing the change amount of the air gap permeance. The amount of change in air gap permeance can be reduced by giving an offset to the shape of the end of the permanent magnet.

The connection surface 23 may include a protrusion 231 formed to protrude, and the mounting hole H may be formed in a shape corresponding to the magnet portion 20 .

The protrusion 231 may prevent the magnet part 20 from being separated from the mounting hole H.

Meanwhile, the intermediate piece 10 may include a first medium piece 11 , a second medium piece 12 , and a third medium piece 13 .

Here, the second medium piece 12 is laminated on one side of the first medium piece 11 , and the third medium piece 13 is laminated on the other side of the second medium piece 12 . can

The first medium piece 11 may include a first fastening hole 111 formed by being penetrated, a first recessed groove 113 formed by being depressed, and a first connection hole 115 formed by being penetrated. .

Here, the first fastening hole 111 , the first recessed groove 113 , and the first connection hole 115 have a first direction S1 in a space between the plurality of first mounting holes H1 . may be alternately formed.

The second medium piece 12 may include a second fastening hole 121 that is formed to be penetrated, a second recessed groove 123 that is formed by being depressed, and a second connection hole 125 that is formed to be penetrated. .

Here, the second connection hole 125 , the second recessed groove 123 and the second fastening hole 121 are spaced apart from the plurality of second mounting holes H2 in the first direction S1 . may be alternately formed along the

The first coupling hole 111 and the second connection hole 125 may be disposed to overlap in the first axial direction.

The first fastening hole 111 passes through the first radius portion 111a and the first radius portion 111a recessed in a first radius from the other side of the first medium piece 11, It may be composed of a second radius portion 111b recessed into a second radius smaller than one radius.

The first recessed groove 113 and the second recessed groove 123 are overlapped in the first axial direction, and the first connection hole 115 and the second coupling hole 121 are It may be arranged to overlap in the first axial direction.

The intermediate part 10 is simultaneously inserted into the first fastening hole 111 and the second connection hole 125 to connect the first intermediate piece 11 and the second intermediate piece 12 . A first connection part 16 may be further provided.

The first connection part 16 is connected to a first head part 161 formed in a shape corresponding to the first radius part 111a and the first head part 161, and the second radius part ( 111b) and may be composed of a first cylindrical portion 162 formed in a corresponding shape.

The intermediate part 10 is simultaneously inserted into the first recessed groove 113 and the second recessed groove 123 to connect the first medium piece 11 and the second medium piece 12 . A second connection unit 17 may be further provided.

The first recessed groove 113 is recessed from one side of the 1-1 recessed piece 113a and the first medium piece 11 formed by being recessed from the other side of the first medium piece 11 . It may be provided with a 1-2 first impregnated piece (113b) is formed.

The second recessed groove 123 is a 2-1 recessed piece 123a formed by being recessed from one side of the second medium piece 12 opposite to one side of the first medium piece 11 and It may be provided with a 2-2 impregnated piece (123b) formed by being depressed from the other side of the second medium piece (12).

The second connecting part 17 is, when the first media piece 11 and the second media piece 12 are stacked, the 1-2 impregnated piece 113b and the 2-1 impregnated piece ( 123a) may be inserted at the same time to connect the first medium piece 11 and the second medium piece 12 .

And, the second connection part 17 is, when the first medium piece 11 and the second medium piece 12 are stacked, the 1-2 impregnated piece 113b and the 2-1 impregnated piece It may be formed in a shape corresponding to the space formed by the piece 123a.

The 1-2 impregnated piece 113b and the 2-1 impregnated piece 123a have a cylindrical shape coaxially provided when the first intermediate piece 11 and the second intermediate piece 12 are stacked. can provide

Specifically, the second medium piece 12 is laminated while being rotated to form the skew angle A with the first medium piece 11 . Here, the second connection part 17 is a cylindrical shape, and in order to be simultaneously inserted into the 1-2 impregnated piece 113b and the 2-1 impregnated piece 123a, the 1-2 impregnated piece 113b) And the 2-1 impregnated piece (123a) should be formed in a coaxial cylindrical shape.

Meanwhile, the 2-1 recessed piece 123a and the 2-2 recessed piece 123b may be formed to be shifted to form the skew angle A.

Specifically, the third medium piece 13 is stacked while being rotated to form the skew angle A with the second medium piece 12 . Here, the connecting portion that mediates the second medium piece 12 and the third medium piece 13 is the second medium piece 12 and the third medium piece 13 like the second connecting portion 17 . Since they must be simultaneously inserted into the recessed piece of the 2-1, the 2-1 recessed piece 123a and the 2nd-2nd recessed piece 123b should form the skew angle A.

The intermediate part 10 may further include a cover member 52 covering the intermediate part 10 and a third connecting part 18 connecting the first intermediate piece 11 .

The third connection part 18 may be simultaneously inserted into the cover hole 521 formed in the cover member 52 and the first connection hole 115 .

The second fastening hole 121 passes through the third radius portion 121a and the second radius portion 111b recessed in a first radius from one side of the second medium piece 12, It may be composed of a fourth radius portion 121b recessed into a second radius smaller than one radius.

The intermediate unit 10 may further include a third medium piece 13 laminated on the other side of the second medium piece 12 .

The third medium piece 13 may include a third fastening hole 131 which is formed through, a third recessed groove 133 which is formed by being depressed, and a third connection hole 135 which is formed through through. . The third medium piece 13 may be formed in the same shape as the first medium piece 11 .

Here, the third fastening hole 131 , the third recessed groove 133 , and the third connection hole 135 may form a space between the plurality of third mounting holes H3 in the first direction S1 . may be alternately formed.

The intermediate part 10 is simultaneously inserted into the second fastening hole 121 and the third connection hole 135 to connect the second intermediate piece 12 and the third intermediate piece 13 . A fourth connection part 19 may be further provided.

The fourth connection part 19 is connected to a second head part 191 formed in a shape corresponding to the third radius part 121a and the second head part 191, and the fourth radius part ( 121b) and may be composed of a second cylindrical portion 192 formed in a shape corresponding to.

On the other hand, in the method for manufacturing the pole piece 1 for magnetic gear according to an embodiment of the present invention, the inner magnetic flux part 2 in which a plurality of permanent magnets are coupled to the outer circumferential surface of the rotating body formed with respect to the first axis L. It is a method of manufacturing a magnetic gear pole piece (1) coaxial with the inner magnetic flux part (2) and arranged between the outer magnetic flux part (3) to which a plurality of permanent magnets are coupled to the inner peripheral surface to adjust the magnetic flux.

The method for manufacturing the magnetic gear pole piece 1 may include first to fifth steps.

The first step is a step of preparing a plurality of first media pieces 11 having a plurality of mounting holes (H) that are formed in an annular shape and are formed through.

The second step is a step of mounting a permanent magnet in the plurality of mounting holes (H) of the first medium piece (11).

The third step is a step of preparing a plurality of second media pieces 12 having a plurality of mounting holes (H) that are formed in an annular shape and are formed through.

The fourth step is a step of mounting a permanent magnet in the plurality of mounting holes (H) of the second medium piece (12).

The fifth step is a step of alternately stacking the first medium piece 11 and the second medium piece 12 .

Here, the stacked first medium piece 11 and the second medium piece 12, the magnet portion 20 inserted into each mounting hole (H) along the first axial direction skew angle (A, skew) angle) can be stacked.

The skew angle (A, skew angle) is a skew angle (A) preset with respect to the magnet part 20 inserted into the adjacent mounting hole (H) while going in the first axial direction, the circumferential length of the permanent magnet, the first 1 It may have various values depending on the length in the axial direction, the number of batches, and the like.

The skew angle A is set to increase in one direction while going in the axial direction to reduce torque ripple, and various configurations are possible.

As described above, it was confirmed through analysis that when an appropriate skew angle (A) was placed in the arrangement of the magnet unit 20 , the torque was decreased while the torque ripple was greatly reduced.

In the first step, a first fastening hole 111 formed by penetrating the first medium piece 11 , a first depression groove 113 formed by being depressed, and a first connection hole 115 formed therethrough It may further include the step of processing.

In addition, in the third step, a second fastening hole 121 formed through the second medium piece 12 , a second recessed groove 123 formed by being depressed, and a second connection hole formed therethrough ( 125) may further include processing.

In the fifth step, the first coupling hole 111 and the second connection hole 125 are simultaneously inserted to connect the first medium piece 11 and the second medium piece 12 . Mounting the connecting part 16 and simultaneously inserted into the first recessed groove 113 and the second recessed groove 123 to connect the first medium piece 11 and the second medium piece 12 It may further include the step of mounting the second connection portion (17).

Meanwhile, referring to FIGS. 1 and 2 , in the magnetic gear 100 according to an embodiment of the present invention, the inner magnetic flux in which a plurality of permanent magnets are coupled to the outer circumferential surface of the rotating body formed based on the first axis L The part 2, the outer magnetic flux part 3 coaxial with the inner magnetic flux part 2 and to which a plurality of permanent magnets are coupled to the inner circumferential surface, the pole piece 1 described with reference to FIGS. 1 to 6, and the inner magnetic flux It may include a housing 5 for rotatably supporting the inner axis of rotation of the part (2) and the outer axis of rotation of the outer magnetic flux unit (3).

The inner magnetic flux part 2 is a configuration in which a plurality of permanent magnets are coupled to an outer circumferential surface, and various configurations are possible depending on the rotation or fixed structure.

For example, the inner magnetic flux part 2 is a rotatably installed structure, and the inner core part 300 to which a plurality of permanent magnets are coupled to the outer circumferential surface, and the inner core part 300 are coupled to the inner core part 300 to rotate from the outside. It may include an inner rotation shaft receiving input or output.

The inner core part 300 is a configuration in which a plurality of permanent magnets are coupled to an outer circumferential surface, and a rotation is input or output from the outside through the coupled inner rotation shaft, and various configurations are possible.

The inner core part 300 has a hollow formed therein so as to be coupled through the inner rotation shaft in the longitudinal direction, and a plurality of permanent magnets may be coupled to the outer circumferential surface.

Through this, the inner core part 300 rotates the outer magnetic flux part 3 by the magnetic force acting through the plurality of permanent magnets installed in the outer magnetic flux part 3 and the pole piece 1, or the outer magnetic flux It can be rotated by the part (3).

In addition, the inner core part 300 may be formed by stacking a plurality of electrical steel plates.

The permanent magnet is a member that is coupled to the outer peripheral surface of the inner core part 300, and a magnetic force interacts with a plurality of permanent magnets installed in the outer magnetic flux part 3 and the magnetic force through the pole piece 1, and various configurations are possible. .

For example, in the permanent magnet, a plurality of N poles and S poles may be alternately disposed on the outer peripheral surface of the inner core part 300 in order, and the rotation ratio of the outer magnetic flux part 3 and the inner magnetic flux part 2 . It can be arranged with a preset number and circumferential length in consideration of the.

In addition, the plurality of permanent magnets may be disposed at the same interval, and more preferably, may be disposed and coupled to have the same area along the outer circumferential surface of the inner core part 300 .

The inner rotation shaft penetrates the hollow formed in the inner core portion 300 and is coupled to the inner core portion 300 to transmit the power of the inner core portion 300 to the outside, and various configurations are possible.

For example, the inner rotation shaft penetrates through a hollow formed in the inner core portion 300 and is coupled to the inner core portion 300. Power transmitted from the coupled power source may be transmitted to the inner core part 300 .

Conversely, the inner rotation shaft may be rotated by a rotational force input by an outer rotation shaft to be described later.

Although the inner magnetic flux part 2 has been described with reference to an embodiment in which it is rotatably installed, of course, it may be configured in a fixed state according to a rotation combination.

The outer magnetic flux part 3 is a configuration in which a plurality of permanent magnets are coupled to an inner circumferential surface, and various configurations are possible depending on the rotation or fixed structure.

Here, the outer magnetic flux unit 3 includes a plurality of permanent magnets in which a preset number of N poles and S poles are alternately disposed, and is a rotatably installed configuration, and various configurations are possible.

For example, the outer magnetic flux unit 3, a plurality of permanent magnets are coupled to the inner circumferential surface, the outer core portion 400 is rotatably installed, and the outer core portion 400 is coupled to the output rotation to the outside Or it may include an external rotation shaft receiving input.

The outer core part 400 is a configuration for inputting or outputting rotation through an outer rotation shaft which is installed to be rotatable and coupled thereto, and various configurations are possible.

For example, the outer core part 400 has a plurality of permanent magnets coupled to an inner circumferential surface corresponding to the pole piece 1 , and an outer rotation shaft is coupled to at least one of both sides in the longitudinal direction.

Specifically, the outer core part 400 has a cylindrical shape so that a plurality of permanent magnets are installed on the inner circumferential surface, and the pole piece 1 and the inner magnetic flux part 2 concentrically formed therein can be installed. desirable.

Meanwhile, the outer core part 400 may be formed by stacking a plurality of electrical steel plates.

The plurality of permanent magnets are coupled to the inner circumferential surface of the outer core part 400 and induce magnetic flux changes according to relative rotation through the plurality of permanent magnets of the inner magnetic flux part 2 and the pole piece 1, Various configurations are possible.

For example, in the plurality of permanent magnets, a plurality of N poles and S poles may be alternately arranged on the inner circumferential surface of the outer core part 400 in order, and the outer magnetic flux part 3 and the inner magnetic flux part 2 It may be arranged with a preset number and circumferential length in consideration of the rotation ratio of .

In addition, the plurality of permanent magnets may be arranged at regular intervals along the circumferential direction, and more preferably, may be arranged and coupled to have a constant area along the inner circumferential surface of the outer core part 400 .

The outer rotation shaft is coupled to at least one side of both sides based on the longitudinal direction of the outer core part 400 to output a rotational force to the outside according to the change in the mutual magnetic flux of the inner magnetic flux part 2 and the outer rotor part, or the inner magnetic flux part Various configurations are possible with the configuration for inputting rotational force in (2).

For example, the outer rotation shaft is coupled to the outer core portion 400, and when power is input to the outer magnetic flux portion 3, the outer core portion ( 400) can be transmitted.

Conversely, the outer rotation shaft may be rotated by a rotational force input by the inner rotation shaft.

On the other hand, although the external magnetic flux part 3 has been described with reference to an embodiment in which it is rotatably installed, of course, it may be configured in a fixed state according to a rotation combination.

The housing 5 is a configuration in which the inner magnetic flux portion 2, the pole piece 1 and the outer magnetic flux portion 3 are installed therein, and various configurations are possible.

For example, the housing 5 may include a housing body 51 having a cylindrical shape with an open end, and a cover member 52 covering the open portion of the housing body 51 .

The cover member 52 is a member that covers the open portion of the housing body 51 , and may be coupled to the housing body 51 by a bolt or the like.

On the other hand, the housing body 51 and the cover member 52, various configurations are possible according to the support shaft.

The magnetic gear 100 constitutes a rotary device accompanying rotation of one or more shafts, for example, the inner rotation shaft of the inner magnetic flux part 2 and the outer rotation shaft of the outer magnetic flux part 3, and the weight after final assembly There is a problem that vibration can occur due to the imbalance of

Accordingly, the magnetic gear 100 having the above configuration is balancing through rotation in an assembly state composed of the inner magnetic flux part 2 , the pole piece 1 and the outer magnetic flux part 3 , that is, the rotational moment of inertia. In order to achieve balance, it can be manufactured through a balancing process in which a part of the rotating component is removed by a processing device such as a milling machine.

Here, the rotational configuration may be a rotating member, for example, the inner magnetic flux portion 2 and the outer magnetic flux portion 3 .

The balancing process is performed in an assembly state composed of the inner magnetic flux part 2, the pole piece 1 and the outer magnetic flux part 3, balancing through rotation, that is, in order to balance the rotational moment of inertia, a milling machine, etc. This is a process of removing a part of the rotating component by means of various methods.

For example, in the balancing process, the vibration is analyzed through rotation in an assembly state composed of the inner magnetic flux part 2, the pole piece 1 and the outer magnetic flux part 3, and the configuration rotated according to the vibration analysis, the inner This may be performed by removing a portion of at least one of the magnetic flux portion 2 and the outer magnetic flux portion 3 .

7 and 8 are schematic diagrams for explaining a propulsion module according to an embodiment of the present invention.

7 and 8, the propulsion module according to an embodiment of the present invention, the rotational force generating unit 1100 for generating a rotational force, the above-described magnetic gear 100 and the inner rotational shaft of the magnetic gear 100 ( 110) and a first propeller 1210 that rotates to generate thrust while connected to any one of the outer rotation shaft 120 and the inner rotation shaft 110 and the outer rotation shaft 120 of the magnetic gear 100 It may include a thrust generating unit 1200 having a second propeller 1220 that is rotated to generate thrust while being connected to the other one.

The rotational force generating unit 1100 is a configuration for generating rotational force, and various configurations are possible, such as generating rotational force by an engine such as a jet engine or an internal combustion engine, or generating rotational force by electricity such as an electric motor.

Here, the rotational force generating unit 1100 may be installed inside the body 910 .

In addition, the body 910 may be formed like a drone shown in the drawings, and may be connected by a connection part (not shown) for connection with a main body, such as a ship or an aircraft.

The magnetic gear 100 is a magnetic gear 100 having the above-described configuration, and the rotational shaft 1110 of the rotational force generating unit 1100 is connected to any one of the inner rotational shaft 110 and the outer rotational shaft 120 to generate a rotational force. Various configurations are possible as a configuration that receives the rotational force of the generator 1100 .

In particular, in the magnetic gear 100, both the inner rotation shaft 110 and the outer rotation shaft 120 should be located coaxially, the inner rotation shaft 110 is connected to the rotation shaft 1110 of the rotational force generating unit 1100 and , through the hollow structure of the outer rotation shaft 120 may be connected to the second propeller 1220 to be described later.

The thrust generating unit 1200 is a first propeller 1210 in which the rotating shaft 1110 of the rotating force generating unit 1100 is connected to any one of the inner rotating shaft 110 and the outer rotating shaft 120 and rotated to generate thrust. and a second propeller 1220 connected to the other of the inner rotation shaft 110 and the outer rotation shaft 120 of the magnetic gear 100 and rotated to generate thrust, and various configurations are possible.

The first propeller 1210 is a configuration in which the rotation shaft 1110 of the rotational force generating unit 1100 is connected to any one of the inner rotation shaft 110 and the outer rotation shaft 120 and rotates to generate thrust. It is possible.

For example, the first propeller may be composed of a plurality of blades coupled along the circumferential direction to the hollow rotation shaft 1110 connected to the inner rotation shaft 110 .

In addition, the second propeller 1220 is connected to the other one of the inner rotation shaft 110 and the outer rotation shaft 120 of the magnetic gear 100 and rotates to generate thrust, and various configurations are possible.

For example, the second propeller 1220 includes a plurality of blades coupled along the circumferential direction to the rotation shaft 1110 connected to the outer rotation shaft 120 through the inner rotation shaft 110 and the hollow rotation shaft 1110. can be

Meanwhile, the first propeller 1210 and the second propeller 1220 are rotated opposite each other according to the rotation structure of the magnetic gear 100 .

At this time, by adjusting the gear ratio of the first propeller 1210 and the second propeller 1220 to vary the rotation speed of the first propeller 1210 and the second propeller 1220, the propulsion efficiency can be maximized according to the propulsion environment. can

For example, when the ship propulsion module is applied, the rotation shaft 1110 of the rotational force generating unit 1100 and the rotation shaft 1110 of the second propeller 1220 are connected to the rotation shaft 1110 and the second of the rotational force generating unit 1100 The rotational speed of the propeller 1220 is the same, and the rotational shaft 1110 of the second propeller 1220 is decelerated by the magnetic gear 100 and is smaller than the rotational speed of the rotational shaft 1110 of the rotational force generating unit 1100. can be rotated to

The propulsion module having the above configuration may be any system requiring thrust, such as a propulsion module of a drone, a propulsion module of an aircraft or a marine vessel.

On the other hand, the propulsion module according to the present invention includes a first propeller 1210 and a second propeller 1220 that are rotated opposite to each other by a rotational force generating unit 1100 such as an electric motor and a magnetic gear 100 as follows. have the same advantages.

First, in the case of a propellant (drone, ship, aviation, torpedo, submersible, etc.) propelled by a single propeller rotation, the fuselage rotates or inclines together due to the torque generated by the propeller rotational motion, such as straightness, speed, etc. will affect the performance of

In addition, when a single propeller is driven, the number and diameter of the blades increase according to the payload, but the frame structure is complicated and the rotational characteristics are caused by the increase in the load and the increase in size.

As an alternative to such a single propeller, if a counter-rotating (coaxial inversion) propeller is applied, it is possible to realize in-situ flight performance, and it can be applied as a method of reducing the diameter of the propeller and increasing the thrust.

Therefore, if a counter-rotation (coaxial inversion) propeller is applied for aviation, especially drones, it is possible to realize in-situ flight performance, and has the advantage of reducing the diameter of the propeller and increasing the thrust.

In particular, in the case of a semi-rotating propeller, compared to a single propeller, there is an effect of improving the propulsion efficiency by about 16% at low speed and about 9% at high speed.

However, in the case of the conventional coaxial inverting propeller, since an electric motor and a drive are each required, one more slave electric motor and one drive are required along with a complicated frame structure, and it is a burden to upper level control.

In contrast, the propulsion module according to the present invention is a first propeller 1210 and a second propeller ( 1220), an electric motor and a drive are inherently anti-clockwise, and the structure is relatively simple, and there is an advantage in that the burden on upper-level control can be reduced.

In the above, the configuration and features of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and it is understood that various changes or modifications can be made within the spirit and scope of the present invention. It is intended that such changes or modifications will be apparent to those skilled in the art, and therefore fall within the scope of the appended claims.

1: Pole piece for magnetic gear L: 1st axis

2: inner magnetic flux part 3: outer magnetic flux part

10: intermediate part A: skew angle

H: mounting hole H1: first mounting hole

H2: second mounting hole H3: third mounting hole

11: first medium piece S1: first direction

12: Second medium 13: Third medium

16: first connection unit 17: second connection unit

18: third connection part 19: fourth connection part

20: magnet part 21: first opposite surface

22: second opposing surface 23: connection surface

231: protrusion 100: magnetic gear

5: housing 51: housing body

52: cover member 1100: rotational force generating unit

1110: rotation shaft 100: magnetic gear

110: inner rotation shaft 300: inner core part

120: outer rotation shaft 400: outer core part

1200: thrust generating unit 1210: first propeller

1220: second propeller

Claims (13)

1. It is disposed between an inner magnetic flux part to which a plurality of permanent magnets are coupled to the outer circumferential surface of the rotating body formed based on the first axis and an outer magnetic flux section coaxial with the inner magnetic flux section and coupled to the inner circumferential surface of the plurality of permanent magnets to adjust the magnetic flux In the magnetic gear pole piece,

   an intermediate part interposed between the inner magnetic flux part and the outer magnetic flux part and having a plurality of mounting holes passing therethrough while being spaced apart from each other by a predetermined distance; and

   and a magnet part inserted into the plurality of mounting holes;

   The mediator is

   and a plurality of media pieces stacked along the first axial direction,

   The plurality of medium pieces,

   A pole piece for magnetic gear, characterized in that the magnet parts inserted into the respective mounting holes are stacked to form a skew angle along the first axial direction.
2. According to claim 1,

   The magnet part,

   a first opposing surface facing the outer magnetic flux unit, a second opposing surface facing the inner magnetic flux unit, and a connection surface connecting the first opposing surface and the second opposing surface;

   The width of the first facing surface is,

   The pole piece for magnetic gear, characterized in that it is larger than the width of the second opposing surface.
3. According to claim 1,

   The magnet part,

   A pole piece for magnetic gear, characterized in that an edge facing the outer magnetic flux part and an edge facing the inner magnetic flux part are formed in a round shape.
4. According to claim 1,

   The intermediate unit includes a first medium piece and a second medium piece laminated on one side of the first medium piece,

   The first medium is

   A first fastening hole formed by being penetrated, a first recessed groove formed by being depressed, and a first connection hole formed by being penetrated are provided;

   The first fastening hole, the first recessed groove, and the first connection hole,

   It is alternately formed along the first direction in the spaced apart space of the plurality of first mounting holes,

   The second medium is

   A second fastening hole formed through the penetration, a second recessed groove formed by being depressed, and a second connection hole formed through the penetration,

   The second connection hole, the second recessed groove and the second fastening hole,

   It is alternately formed in the space of the plurality of second mounting holes along the first direction,

   The first fastening hole and the second connecting hole are disposed to overlap in the first axial direction,

   The first recessed groove and the second recessed groove are disposed to overlap in the first axial direction,

   The first connection hole and the second fastening hole, the magnetic gear pole piece, characterized in that disposed to overlap in the first axial direction.
5. 5. The method of claim 4,

   The mediator is

   It is inserted into the first fastening hole and the second connection hole at the same time, further comprising a first connecting portion for connecting the first medium piece and the second medium piece,

   The first fastening hole,

   It consists of a first radius portion recessed in a first radius from the other side of the first medium piece and a second radius portion penetrating the first radius portion, but recessed in a second radius smaller than the first radius,

   The first connecting portion includes a first head portion formed in a shape corresponding to the first radius portion and a first cylindrical portion connected to the first head portion and formed in a shape corresponding to the second radius portion A pole piece for magnetic gear, characterized in that.
6. 5. The method of claim 4,

   The mediator is

   It is inserted into the first recessed groove and the second recessed groove at the same time, further comprising a second connecting portion for connecting the first medium piece and the second medium piece,

   The first recessed groove,

   and a first 1-1 impregnated piece formed by being depressed from the other side of the first medium piece and a 1-2 impregnated piece formed by being depressed from one side of the first medium piece,

   The second recessed groove,

   It includes a 2-1 impregnated piece formed by being depressed from one side of the second medium piece opposite to one side of the first medium piece and a 2-2 impregnated piece formed by being depressed from the other side of the second medium piece, ,

   The second connection part,

   When the first intermediate piece and the second intermediate piece are stacked, the first intermediate piece and the second intermediate piece are simultaneously inserted into the 1-2 impregnated piece and the 2-1 impregnated piece to connect the first intermediate piece and the second intermediate piece pole piece for magnetic gear.
7. 7. The method of claim 6,

   The second connection part,

   When the first medium piece and the second medium piece are stacked, the first and second impregnated pieces and the 2-1 impregnated pieces are formed in a shape corresponding to the space formed,

   The 2-1 impregnated piece and the 2-2 impregnated piece are,

   A pole piece for magnetic gear, characterized in that it is provided to be shifted to form the skew angle.
8. 5. The method of claim 4,

   The mediator is

   A cover member covering the intermediate portion and a third connecting portion connecting the first intermediate piece are further provided,

   The third connection part,

   It is simultaneously inserted into the cover hole formed in the cover member and the first connection hole,

   The second fastening hole,

   It consists of a third radius part recessed in a first radius from one side of the second medium piece and a fourth radius part penetrating the second radius part, but recessed in a second radius smaller than the first radius,

   The mediator is

   Further comprising a third medium piece laminated on the other side of the second medium piece,

   The third medium is

   A third fastening hole that is formed through, a third recessed groove that is formed by being depressed, and a third connection hole that is formed through,

   The third fastening hole, the third recessed groove, and the third connecting hole,

   It is alternately formed along the first direction in spaced apart spaces of the plurality of third mounting holes,

   The mediator is

   and a fourth connection part which is inserted into the second fastening hole and the third connection hole at the same time to connect the second medium piece and the third medium piece,

   The fourth connecting portion includes a second head portion formed in a shape corresponding to the third radius portion and a second cylindrical portion connected to the second head portion and formed in a shape corresponding to the fourth radius portion A pole piece for magnetic gear, characterized in that.
9. 3. The method of claim 2,

   The connection surface has a protrusion formed to protrude,

   The mounting hole is formed in a shape corresponding to the magnet part,

   The protrusion portion, the magnetic gear pole piece, characterized in that to prevent separation from the mounting hole of the magnet portion.
10. It is disposed between an inner magnetic flux part to which a plurality of permanent magnets are coupled to the outer circumferential surface of the rotating body formed based on the first axis and an outer magnetic flux section coaxial with the inner magnetic flux section and coupled to the inner circumferential surface of the plurality of permanent magnets to adjust the magnetic flux In the method of manufacturing a pole piece for a magnetic gear,

    A first step of preparing a plurality of first medium pieces formed in an annular shape and having a plurality of mounting holes that are formed through;

    a second step of mounting a permanent magnet in a plurality of mounting holes of the first medium piece;

    A third step of preparing a plurality of second medium pieces formed in an annular shape and having a plurality of mounting holes that are formed through;

    a fourth step of mounting a permanent magnet in a plurality of mounting holes of the second medium piece; and

    A fifth step of alternately stacking the first medium piece and the second medium piece;

    The first and second media pieces to be laminated are,

    A method for manufacturing a magnetic gear pole piece, characterized in that the magnet parts inserted into the respective mounting holes are stacked to form a skew angle along the first axial direction.
11. 11. The method of claim 10,

    The first step is

    Further comprising the step of machining a first fastening hole formed through the first medium piece, a first recessed groove formed by being depressed, and a first connection hole formed therethrough,

    The third step is

    Further comprising processing a second fastening hole formed through the second medium piece, a second recessed groove formed by being depressed, and a second connection hole formed therethrough,

    The fifth step is

    Mounting a first connection part which is inserted into the first fastening hole and the second connection hole at the same time to connect the first medium piece and the second medium piece; and

    The pole piece for magnetic gear, characterized in that it further comprises the step of mounting a second connection part which is inserted into the first recessed groove and the second recessed groove at the same time to connect the first intermediate piece and the second intermediate piece. manufacturing method.
12. an inner magnetic flux unit to which a plurality of permanent magnets are coupled to an outer circumferential surface of the rotating body formed with respect to the first axis;

    an outer magnetic flux portion coaxial with the inner magnetic flux portion and to which a plurality of permanent magnets are coupled to an inner circumferential surface;

    The pole piece according to any one of claims 1 to 9; and

    and a housing for rotatably supporting the inner rotation shaft of the inner magnetic flux part and the outer rotation shaft of the outer magnetic flux part.
13. a rotational force generating unit for generating a rotational force;

    The magnetic gear according to claim 12, wherein the rotational force generating unit is connected to any one of the inner rotation shaft and the outer rotation shaft; and

    A first propeller that is rotated to generate thrust while connected to any one of the inner rotation shaft and the outer rotation shaft of the magnetic gear, and the other one of the inner rotation shaft and the outer rotation shaft of the magnetic gear, rotated to generate thrust A propulsion module comprising a; a thrust generating unit having a second propeller to be generated.

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