JP2024087964A - Pole piece panel unit, pole piece rotor, and magnetic gear electric machine - Google Patents

Abstract

To provide a pole piece panel unit of which the vibration prevention function is improved, a pole piece rotor, and a magnetic gear electric machine.SOLUTION: A pole piece panel unit comprises: a first pole piece panel including a first circumferential end which is an end at one side in a circumferential direction; and a second pole piece panel including a second circumferential end which is an end at the other side in the circumferential direction, the second pole piece panel being adjacent to the first pole piece panel in the circumferential direction. The first circumferential end includes a first main body extending in an axial direction and a first protrusion protruding from the first main body to one side in the circumferential direction. The second circumferential end includes a second main body extending in the axial direction and a second protrusion protruding from the second main body to the other side in the circumferential direction and being disposed side by side with the first protrusion in a radial direction. The pole piece panel unit further comprises a fixture member including a shaft, which is inserted through a first insertion hole formed in the first protrusion and a second insertion hole formed in the second protrusion, and fixed to the first protrusion and the second protrusion.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a pole piece panel unit, a pole piece rotor, and a magnetic gear electric machine.

Conventionally, a pole piece panel unit that is incorporated into a pole piece rotor of a magnetic gear electric machine is known. The pole piece panel unit is composed of multiple pole piece panels arranged in the circumferential direction, and each pole piece panel includes multiple pole pieces and multiple non-magnetic bodies arranged alternately along the circumferential direction (see, for example, FIG. 19 of Patent Document 1). Each pole piece has the function of modulating magnetic flux.

International Publication No. 2021/149772

Various radial forces act on the pole piece panel, such as electromagnetic forces generated when the magnetic flux is modulated, or centrifugal forces generated when the pole piece rotor rotates. At least one of these forces acts as an excitation force on the pole piece panel, inducing vibration of the pole piece panel and possibly damaging the pole piece panel unit. For example, when the magnetic gear is driven, the pole piece panel unit may resonate, causing damage between adjacent pole piece panels.

The object of the present disclosure is to provide a pole piece panel unit, a pole piece rotor, and a magnetic gear electric machine with improved vibration isolation capabilities.

A pole piece panel unit according to at least one embodiment of the present disclosure comprises:
A pole piece panel unit including a plurality of pole piece panels each including a plurality of pole pieces and a plurality of non-magnetic bodies alternately arranged along a circumferential direction based on an axis line,
a first pole piece panel including a first circumferential end portion that is an end portion on one side in the circumferential direction;
a second pole piece panel adjacent to the first pole piece panel in the circumferential direction, the second pole piece panel including a second circumferential end portion that is an end portion on the other side in the circumferential direction;
Equipped with
The first peripheral end portion is
A first body portion extending in an axial direction;
a first protruding portion protruding toward the one side in the circumferential direction further than the first main body portion,
The second peripheral end portion is
A second body portion extending in the axial direction;
a second protruding portion that protrudes toward the other side in the circumferential direction relative to the second main body portion and is aligned in a radial direction with the first protruding portion,
The connector further includes a fixing member including an axial portion inserted into a first insertion hole formed in the first protrusion and a second insertion hole formed in the second protrusion, the fixing member being fixed to the first protrusion and the second protrusion.

A pole piece panel unit according to at least one embodiment of the present disclosure comprises:
The pole piece panel unit;
a first connecting portion connected to one end of the pole piece panel unit in the axial direction and to a rotating shaft of a magnetic gear electric machine;
The pole piece panel unit further includes a second connecting portion that is connected to the other end in the axial direction of the pole piece panel unit and to the rotation shaft.

A magnetic gear electric machine according to at least one embodiment of the present disclosure comprises:
The pole piece rotor;
a rotor including a plurality of rotor magnets arranged in the circumferential direction on the inner or outer side of the radial direction with respect to the pole piece panel unit;
a stator including a plurality of stator magnets arranged in the circumferential direction on the opposite side of the pole piece panel unit from the plurality of rotor magnets.

The present disclosure provides a pole piece panel unit, a pole piece rotor, and a magnetic gear electric machine with improved vibration isolation capabilities.

FIG. 1 is a schematic diagram of a magnetic gear electric machine according to an embodiment. FIG. 2 is a schematic diagram of a pole piece rotor according to one embodiment. FIG. 2 is a schematic diagram illustrating a pole piece panel unit according to one embodiment. FIG. 2 is a schematic diagram illustrating a cross section of a pole piece panel unit according to one embodiment. FIG. 2 is a schematic diagram of a pole piece panel unit according to some embodiments. FIG. 2 is a schematic diagram of a fixing member according to the first embodiment (first example). FIG. 2 is a schematic diagram of a fixing member according to the first embodiment (second example). 10 is a schematic diagram of a fixing member according to a second embodiment. FIG. 11A-11C are schematic diagrams illustrating a method of assembling a pole piece panel unit according to one embodiment.

Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure.
For example, expressions expressing relative or absolute configuration, such as "in a certain direction,""along a certain direction,""parallel,""orthogonal,""center,""concentric," or "coaxial," not only express such a configuration strictly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained.
For example, expressions indicating that things are in an equal state, such as "identical,""equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained.
For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained.
On the other hand, the expressions "comprise", "include", or "have" a certain element are not exclusive expressions excluding the presence of other elements.
In addition, the same components are denoted by the same reference numerals and the description thereof may be omitted.

1. Overview of magnetic gear electric machine 1
1 is a schematic diagram of a magnetic gear electric machine 1 according to an embodiment of the present disclosure. The magnetic gear electric machine 1 includes a rotating shaft 5 connected to an external rotating device 7. In the following description, the "circumferential direction" refers to the circumferential direction based on the axis S of the rotating shaft 5, the "axial direction" refers to the axial direction of the axis S, and the "radial direction" refers to the radial direction based on the axis S. The "radial inner direction" refers to the direction approaching the axis S, and the "radial outer direction" refers to the direction away from the axis S. The axis S is also the axis of a pole piece panel unit 50, which will be described later.

The magnetic gear electric machine 1 includes a housing 9 that rotatably supports a rotating shaft 5, and a pole piece rotor 30 that is connected to the rotating shaft 5 inside the housing 9. The pole piece rotor 30 includes a cylindrical pole piece panel unit 50 that extends along the axis S, a first connecting portion 31 that is connected to one end 51 of the pole piece panel unit 50 in the axial direction and the rotating shaft 5, and a second connecting portion 32 that is connected to the other end 52 of the pole piece panel unit 50 in the axial direction and the rotating shaft 5. The pole piece panel unit 50 has a plurality of pole pieces 55 and a plurality of non-magnetic bodies 53 (see FIG. 2) that are alternately arranged along the circumferential direction. In the example of FIG. 1, both the first connecting portion 31 and the second connecting portion 32 are fixed to the rotating shaft 5, and the pole piece rotor 30 is configured to rotate integrally with the rotating shaft 5 (other configuration examples will be described later).

The magnetic gear electric machine 1 further includes a rotor 15. The rotor 15 has a plurality of rotor magnets 19 arranged in the circumferential direction radially inside the pole piece panel unit 50, and a rotor core 16 supporting the rotor magnets 19. In the example of FIG. 1, the rotor core 16 is connected to the rotating shaft 5 via a bearing, and the rotor 15 rotates relative to the rotating shaft 5. The rotor 15 faces the pole piece panel unit 50 in the radial direction with an air gap G1 between them. In the example of FIG. 1, a surface permanent magnet (SPM) configuration in which a plurality of rotor magnets 19 are provided on the surface of the rotor core 16 is adopted, but an interior permanent magnet (IPM) configuration in which a plurality of rotor magnets 19 are arranged inside the rotor core 16 may also be adopted.

The magnetic gear electric machine 1 includes a stator 20 supported by a housing 9. The stator 20 includes a plurality of stator magnets 29 arranged in the circumferential direction on the opposite side of the pole piece panel unit 50 from the plurality of rotor magnets 19, a stator core 25 supporting the stator magnets 29, and a stator coil 27 wound around the stator core 25. The stator coil 27 is electrically connected to the power system 6. The stator 20 faces the pole piece panel unit 50 in the radial direction with an air gap G2 in between. In the example of FIG. 1, an SPM type configuration is adopted in which a plurality of stator magnets 29 are provided on the surface of the stator core 25, but an IPM type configuration in which the stator magnets 29 are arranged inside the stator core 25 may also be adopted.

Although not a required component of the present disclosure, the magnetic gear electric machine 1 includes a fan 3 for blowing cooling air. As an example, the fan 3 is fixed to a rotating shaft 5 inside the housing 9, and the cooling air is circulated inside the housing 9 by the rotation of the fan 3. The cooling air flow path includes air gaps G1 and G2 extending in the axial direction. Note that a hole (not shown) that penetrates the stator core 25 in the axial direction, or a hole (not shown) that penetrates the rotor core 16 in the axial direction, may be additionally provided, and these holes may be used as the cooling air flow path. Furthermore, a cooling air flow path extending in the axial direction may be additionally provided as a component of the housing 9 radially outside the stator core 25.

The magnetic gear electric machine 1 according to one embodiment is a magnetic gear motor that receives power from a power grid 6 to drive an external rotating device 7. The operating principle is as follows. The rotor 15 rotates due to a rotating magnetic field generated by energizing the stator coil 27. The relative positional relationship of the pole piece panel unit 50 to the multiple rotor magnets 19 and the multiple stator magnets 29 changes, and the magnetic flux between the rotor 15 and the stator 20 is modulated by the multiple pole pieces 55, causing the pole piece rotor 30 to rotate. Torque is transmitted from the rotating shaft 5 that rotates together with the pole piece rotor 30 to the external rotating device 7, driving the external rotating device 7.

The magnetic gear electric machine 1 according to another embodiment is a magnetic gear generator. In this case, the external rotating device 7 drives the rotating shaft 5, causing the pole piece rotor 30 to rotate together with the rotating shaft 5. The relative positional relationship with the multiple rotor magnets 19 and the multiple stator magnets 29 changes, causing the rotor 15 to rotate. Electromagnetic induction occurs as the pole piece rotor 30 and the rotor 15 rotate, generating a current in the stator coil 27, which supplies power to the power grid 6.

If the number of poles in the pole piece 55 is NL, the number of pole pairs in the rotor magnet 19 is NH, and the number of pole pairs in the stator magnet 29 is NS, then NL = NH + NS holds. When this relation holds, the ratio of the rotation speed of the rotor 15 to the pole piece rotor 30 is expressed as NL/NH. In this example, NL/NH is greater than 1, so the rotor 15 functions as a high-speed rotor and the pole piece rotor 30 functions as a low-speed rotor. The number of poles NL in the pole piece 55 is less than the number of pole pairs NS in the stator magnet 29.

When the magnetic gear electric machine 1 is driven, the fan 3 rotates together with the rotating shaft 5, causing cooling air to flow through the air gaps G1 and G2. The flow of cooling air cools the pole piece panel unit 50, the rotor 15, the stator 20, or various bearings provided inside the housing 9. The arrows A1 and A2 shown in the enlarged view of Figure 1 illustrate the flow direction of the cooling air in the air gaps G1 and G2.

The magnetic gear electric machine 1 of the present disclosure is not limited to the above embodiment. The first connecting portion 31 and the second connecting portion 32 of the pole piece rotor 30 may each be connected to the rotating shaft 5 via a pair of bearings. In this case, the rotor core 16 is fixed to the rotating shaft 5, and the rotor 15 is configured to rotate integrally with the rotating shaft 5. Furthermore, only one of the first connecting portion 31 or the second connecting portion 32 may be connected to the rotating shaft 5, and the other connecting portion may be connected to a power transmission shaft (not shown) constituting the external rotating device 7 (the power transmission shaft is configured to transmit torque with the rotating shaft 5). In addition, the present disclosure is not limited to the fan 3 being fixed to the rotating shaft 5. Although detailed illustration is omitted, for example, a motor with the fan 3 fixed to its output shaft may be fixed to the outer circumferential surface of the housing 9. In this case, the cooling air sent from the fan 3 may enter the inside of the housing 9 through a communication port that communicates between the inside and outside of the housing 9.

Furthermore, the pole piece rotor 30 may be disposed radially outward from the pole piece panel unit 50, in which case the stator 20 is disposed radially inward from the pole piece panel unit 50. However, the following description will describe an embodiment in which the rotor 15 is disposed radially inward from the pole piece panel unit 50, and the stator 20 is disposed radially outward from the pole piece panel unit 50.

2. Details of the configuration of the pole piece rotor 30
2 is a schematic diagram of a pole piece rotor 30 according to one embodiment of the present disclosure. FIG. 3 is a schematic diagram of a pole piece panel unit 50 according to one embodiment of the present disclosure. The pole piece rotor 30 is configured to rotate about an axis S.

As shown in FIG. 2, the first connecting portion 31 has a ring portion 37 extending in the circumferential direction, a shaft connecting portion 38 that is connected to the rotating shaft 5 (see FIG. 1), and an extension portion 39 that extends radially inward from the ring portion 37 toward the shaft connecting portion 38. The second connecting portion 32 has a shape that is axially symmetrical to the first connecting portion 31. That is, the second connecting portion 32 also has a ring portion 37, a shaft connecting portion 38, and an extension portion 39.

As described above, the pole piece panel unit 50 includes a plurality of pole pieces 55 and a plurality of non-magnetic bodies 53 arranged alternately along the circumferential direction. Each pole piece 55 and each non-magnetic body 53 extend in the axial direction. Each non-magnetic body 53 is longer in the axial direction than each pole piece 55. The non-magnetic body 53 is formed of a fiber reinforced composite material (FRP; Fiber Reinforced Plastics). The FRP may be, for example, glass fiber reinforced plastic (GFRP; Glass Fiber Reinforced Plastics) or carbon fiber reinforced plastic (CFRP; Carbon Fiber Reinforced Plastics). Each pole piece 55 may be formed from multiple electromagnetic steel sheets stacked in the axial direction, multiple powder magnetic cores extending in the axial direction, or a combination of electromagnetic steel sheets and powder magnetic cores.

Although not an essential component of the present disclosure, the pole piece panel unit 50 further includes a plurality of insulators 54. Each insulator 54 is connected to an end of each pole piece 55 in the axial direction. The pole piece 55 and a pair of insulators 54 arranged on both sides of the pole piece 55 in the axial direction form a long pole piece unit. The long pole piece unit has approximately the same axial length as the non-magnetic body 53. A ring unit extending in the circumferential direction is formed by the alternating arrangement of the multiple long pole piece units and the multiple non-magnetic bodies 53. The ring unit corresponds to the main body of the pole piece panel unit 50. A pair of end rings 56 are connected to both ends of the ring unit in the axial direction. In the example of FIG. 2, the pair of end rings 56 respectively constitute one end 51 and the other end 52 in the axial direction of the pole piece panel unit 50. The pair of end rings 56 are each connected to a pair of ring portions 37.
It should be noted that the pair of end rings 56 are not essential components of the present disclosure. For example, both axial end portions of the above-described ring unit may be connected to the pair of ring portions 37, respectively.

3 is a schematic diagram showing a part of a pole piece panel unit 50 according to an embodiment of the present disclosure. The pole piece panel unit 50 having the above configuration includes a plurality of pole piece panels 60 arranged in the circumferential direction (see also FIG. 8). Each pole piece panel 60 is a curved panel extending in the circumferential direction. Two pole piece panels 60 adjacent to each other in the circumferential direction are joined by a fixing member 120 described later to form a ring-shaped pole piece panel unit 50. The above-mentioned plurality of pole pieces 55, the plurality of non-magnetic bodies 53, and the plurality of insulators 54 are incorporated in each pole piece panel 60. Furthermore, each of the above-mentioned pair of end rings 56 is composed of a plurality of end plates 59 arranged in the circumferential direction. The pair of end plates 59 constitute both ends of each pole piece panel 60 in the axial direction. The end plates 59 are plates that extend in the circumferential direction and have a thickness in the axial direction.

In FIG. 3, two circumferentially adjacent pole piece panels 60 are illustrated as a first pole piece panel 61 and a second pole piece panel 62. The first pole piece panel 61 includes a first circumferential end 71 which is an end on one side in the circumferential direction, and the second pole piece panel 62 includes a second circumferential end 72 which is an end on the other side in the circumferential direction. As an example, the first circumferential end 71 is formed of one non-magnetic body 53 and a pair of end plates 59, and the second circumferential end 72 is formed of one non-magnetic body 53 and a pair of end plates 59.

In this embodiment, any one of the multiple non-magnetic bodies 53 is composed of a first non-magnetic body 53A and a second non-magnetic body 53B, and the first non-magnetic body 53A and the second non-magnetic body 53B are respectively incorporated into the first peripheral end 71 and the second peripheral end 72. In other words, a specific non-magnetic body 53 is composed of a first non-magnetic body 53A and a second non-magnetic body 53B, the first non-magnetic body 53A constitutes at least a part of the first peripheral end 71, and the second non-magnetic body 53B constitutes at least a part of the second peripheral end 72. Furthermore, in this embodiment, the first peripheral end 71 and the second peripheral end 72 each incorporate the end in the circumferential direction of the end plate 59.

<3. Overview of the Joint Structure Between the First Pole Piece Panel 61 and the Second Pole Piece Panel 62>
4 is a schematic diagram showing a cross section of a pole piece panel unit 50 according to an embodiment of the present disclosure. The first peripheral end 71 of the first pole piece panel 61 has a first main body portion 81 extending in the axial direction and a first protruding portion 91 protruding to one side in the axial direction from the first main body portion 81. The first protruding portion 91 protrudes from a first end face 85 which is an end face of the first main body portion 81 on one side in the circumferential direction. In the radial direction, the first main body portion 81 is shorter than the first protruding portion 91. The first protruding portion 91 has a tip face 96 which is an end face on one side in the circumferential direction.

The second peripheral end 72 of the second pole piece panel 62 has a second main body portion 82 extending in the axial direction and a second protruding portion 92 protruding to the other circumferential side from the second main body portion 82. The second protruding portion 92 protrudes from a second end face 84, which is the end face of the second main body portion 82 on the other circumferential side. The second protruding portion 92 has a tip face 94, which is the end face on the other circumferential side. The second end face 84 of the second main body portion 82 overlaps radially with the tip face 96 of the first protruding portion 91, and the tip face 94 of the second protruding portion 92 overlaps radially with the first end face 85 of the first main body portion 81.

The second protrusion 92 is aligned with the first protrusion 91 in the radial direction. In other words, the first protrusion 91 and the second protrusion 92 overlap each other in the circumferential direction. A first insertion hole 101 is formed in the first protrusion 91, and a second insertion hole 102 is formed in the second protrusion 92. The first insertion hole 101 is a through hole that penetrates the first protrusion 91 in the radial direction. The second insertion hole 102 may be a through hole that penetrates the second protrusion 92, or may be a hole with one side in the radial direction blocked (in the example of FIG. 4, the second insertion hole 102 is a through hole). The first insertion hole 101 and the second insertion hole 102 are arranged so as to overlap in the circumferential direction. In addition, the number of the first insertion holes 101 and the number of the second insertion holes 102 are the same.

3, the first through-hole 101 is formed only in the non-magnetic body 53 (first non-magnetic body 53A), but may be formed in both the first non-magnetic body 53A and the end plate 59. Similarly, the second through-hole 102 may be formed only in the non-magnetic body 53 (second non-magnetic body 53B), or may be formed in both the second non-magnetic body 53B and the end plate 59. Also, in the example of FIG. 3, the multiple first through-holes 101 are arranged in a straight line, but they may be arranged in a zigzag pattern along the axial direction (the same applies to the arrangement of the second through-holes 102).

Returning to FIG. 4, the pole piece panel unit 50 further includes a fixing member 120 that fixes the first protrusion 91 to the second protrusion 92. The fixing member 120 includes a shaft portion 125 extending in the axial direction, and the shaft portion 125 is inserted into the first insertion hole 101 and the second insertion hole 102. The fixing member 120 may be a fastening member (see FIGS. 6A and 6B), a dashpot (see FIG. 7), or a rivet pin. The specific structure of the fixing member 120 will be described later.

The electromagnetic force directed in the radial direction generated in the pole piece 55 becomes an excitation force directed in the radial direction in the pole piece panel unit 50. In addition, the centrifugal force generated with the rotation of the pole piece rotor 30 also becomes the above-mentioned excitation force. In this respect, according to the above-mentioned configuration, the fixing member 120 including the shaft portion 125 inserted into the first insertion hole 101 and the second insertion hole 102 is fixed to the first protrusion 91 and the second protrusion 92. As a result, even if an excitation force acts on the pole piece panel unit 50, the deflection of the pole piece panel unit 50 can be suppressed. Therefore, the pole piece panel unit 50, the pole piece rotor 30, and the magnetic gear electric machine 1 with improved vibration-proofing function are realized. In addition, the frequency component of the excitation force caused by the above-mentioned electromagnetic force can be made different from the natural frequency of the pole piece panel unit 50, and the magnetic gear electric machine 1 can avoid resonance of the pole piece panel unit 50.

The present disclosure is not limited to the embodiment shown in FIG. 4. In FIG. 4, the first protrusion 91 is disposed radially outward from the second protrusion 92. Alternatively, the first protrusion 91 may be disposed radially inward from the second protrusion 92. Also, the pole piece 55 may constitute the first peripheral end 71 and the second peripheral end 72 instead of the non-magnetic body 53. In any embodiment, a pole piece panel unit 50, a pole piece rotor 30, and a magnetic gear electric machine 1 with improved vibration isolation are realized.

Furthermore, in an embodiment in which the non-magnetic body 53 is longer in the axial direction than each of the pole pieces 55, the non-magnetic body 53 is more flexible in the radial direction than the pole pieces 55. In this regard, according to an embodiment in which the first non-magnetic body 53A constitutes a part of the first circumferential end portion 71 and the second non-magnetic body 53B constitutes a part of the second circumferential end portion 72, the first non-magnetic body 53A is joined to the second non-magnetic body 53B by the fixing member 120, so that the rigidity of the non-magnetic body 53 in the radial direction can be increased and the vibration-proofing function of the pole piece panel unit 50 can be improved.
The pole piece panel unit 50 does not have to include the pair of end rings 56. In this case, the first non-magnetic body 53A may form the entire first peripheral end 71, and the second non-magnetic body 53B may form the entire second peripheral end 72. Even in this case, the above-mentioned advantages can be obtained.

4. Additional Components of the Pole Piece Panel Unit 50
5 is a schematic diagram of a pole piece panel unit 150 (50) according to some embodiments. The pole piece panel unit 150 (50) further includes at least an elastic sheet material 170. The sheet material 170 in this example is a viscoelastic rubber sheet having viscosity in addition to elasticity.

The sheet material 170 is sandwiched between the first peripheral end portion 71 and the second peripheral end portion 72. As a specific example, the sheet material 170 includes a radial extension portion 172 that extends in the radial direction, and a circumferential extension portion 175 that extends in the circumferential direction. In this embodiment, the radial extension portion 172 and the circumferential extension portion 175 are integrally configured.

The radial extension portion 172 has a first radial extension portion 172A arranged between the first protrusion 91 and the second main body portion 82, and a second radial extension portion 172B arranged between the second protrusion 92 and the first main body portion 81. The first radial extension portion 172A is sandwiched between the tip surface 96 of the first protrusion 91 and the second end surface 84 of the second main body portion 82. The second radial extension portion 172B is sandwiched between the tip surface 94 of the second protrusion 92 and the first end surface 85 of the first main body portion 81.

The circumferential extending portion 175 is disposed between the first protruding portion 91 and the second protruding portion 92. More specifically, the circumferential extending portion 175 is sandwiched between the inner end surface 99 of the first protruding portion 91 and the outer end surface 98 of the second protruding portion 92. In the example shown in the figure, the circumferential extending portion 175 is formed with a hole 179 through which the shaft portion 125 of the fixing member 120 is inserted. The hole 179 is disposed so as to be aligned radially with the first insertion hole 101 and the second insertion hole 102. In other words, the hole 179, the first insertion hole 101, and the second insertion hole 102 are disposed so as to overlap each other in the circumferential direction.

According to an embodiment in which the pole piece panel unit 150 (50) includes the sheet material 170, when a force directed in the radial direction occurs as an excitation force in at least one of the first peripheral end 71 or the second peripheral end 72, the elastic sheet material 170 is deformed. More specifically, the first radial extension portion 172A and the second radial extension portion 172B, in which the excitation force acts as a shear force, are deformed in the radial direction. In addition, the circumferential extension portion 175, in which the excitation force acts as a compressive force, is compressed in the radial direction. The excitation force is reduced (cancelled) by the restoring force generated in the deformed sheet material 170, so that the vibration-proofing function of the pole piece panel unit 50 can be further improved.

In other embodiments, the sheet material 170 may include the radial extension portion 172 and may not include the circumferential extension portion 175. In this case, the first radial extension portion 172A and the second radial extension portion 172B may be configured separately from each other. The radial extension portion 172 may have only one of the first radial extension portion 172A and the second radial extension portion 172B. Alternatively, the sheet material 170 may not include the radial extension portion 172 and may only include the circumferential extension portion 175. In any embodiment, the above-mentioned radial force is reduced by the restoring force generated in the deforming sheet material 170, so that the advantage of improving the vibration-proofing function of the pole piece panel unit 50 is obtained.

In addition, according to an embodiment in which the sheet material 170 is a viscoelastic rubber sheet, even if a radial force suddenly occurs as an excitation force at at least one of the first circumferential end portion 71 or the second circumferential end portion 72, the radial force can be instantly reduced by the deformation of the sheet material 170, which is a viscoelastic rubber.

The sheet material 170 may include the radial extension portion 172 and may not include the circumferential extension portion 175. In this case, the first radial extension portion 172A and the second radial extension portion 172B may be configured separately from each other. Furthermore, the radial extension portion 172 may have only one of the first radial extension portion 172A and the second radial extension portion 172B. In any embodiment, it is possible to instantly reduce the excitation force that occurs suddenly.

In addition, according to an embodiment in which the sheet material 170 includes the radial extension portion 172, even if a radial force occurs as an excitation force between the first protrusion 91 and the second main body portion 82, or between the second protrusion 92 and the first main body portion 81, the first radial extension portion 172A and the second radial extension portion 172B can deform to absorb the force. Note that the above-mentioned advantages can be obtained if the radial extension portion 172 has only one of the first radial extension portion 172A or the second radial extension portion 172B.

In addition, according to an embodiment in which the sheet material 170 includes the circumferential extension portion 175, even if an excitation force occurs between the first protrusion 91 and the second protrusion 92, the circumferential extension portion 175 can absorb the force by deforming in the radial direction.

In addition, according to an embodiment in which the circumferential extension portion 175 has a hole 179 through which the shaft portion 125 of the fixing member 120 is inserted, the circumferential extension portion 175 can be arranged around the shaft portion 125, and the area in which the circumferential extension portion 175 is arranged can be expanded. This improves the vibration-proofing function of the pole piece panel unit 150 (50).

5. Fixing member 120 according to the first embodiment
6A and 6B are schematic diagrams of the fixing members 120A, 120B (120) according to the first embodiment. The fixing member 120A is a component of the pole piece panel unit 50A (50), and the fixing member 120B is a component of the pole piece panel unit 50B (50). The pole piece panel units 50A, 50B are provided with first protrusions 91A, 91B (91) and second protrusions 92A, 92B (92). The first protrusions 91A, 91B are formed with first insertion holes 101A, 101B (101), and the second protrusions 92A, 92B are formed with second insertion holes 102A, 102B (102). Although the illustrated pole piece panel units 50A, 50B include the sheet material 170 described above, the sheet material 170 is not a required component of the pole piece panel units 50A, 50B.

The fixing members 120A, 120B are fastening members having shaft portions 125A, 125B (125) and heads 128A, 128B (128) that are connected to one end of the shaft portions 125A, 125B. The outer diameter of the heads 128 is larger than the outer diameter of the shaft portion 125. The heads 128A, 128B (128) press the first protrusions 91A, 91B (91) against the second protrusions 92A, 92B (92). With the above configuration, the first protrusions 91 can be firmly fixed to the second protrusions 92 by pressing the heads 128. Since the rigidity of the pole piece panel unit 50 can be improved, the vibration-proofing function of the pole piece panel unit 50 is improved.

In some embodiments, at least a portion of the heads 128A, 128B (128) is disposed in the first insertion holes 101A, 101B (101).
In the example of Fig. 6A, the entire portion of the head 128A is disposed in the first through-hole 101A. In other words, the head 128A does not protrude radially outward from the first protruding portion 91A. On the other hand, in the example of Fig. 6B, only a portion of the head 128B is disposed in the second through-hole 102B, and the other portion of the head 128B protrudes radially outward from the first protruding portion 91B.

According to the above configuration, the heads 128A, 128B can be prevented from causing rotational resistance when the pole piece panel units 50A, 50B rotate. In addition, when the magnetic gear electric machine 1 is in operation, the heads 128A, 128B can be prevented from blocking the flow of cooling air around the pole piece panel units 50A, 50B, and the temperature rise of the pole piece panel units 50A, 50B can be suppressed. In addition, the radial length of the air gaps G1, G2 (see FIG. 1) in the magnetic gear electric machine 1 is generally very short, for example, a few mm or less or 1 mm or less. In this regard, by arranging at least a part of the heads 128A, 128B in the first insertion holes 101A, 101B, the heads 128A, 128B are prevented from protruding into the air gap G2. As a result, the heads 128A, 128B can be prevented from contacting other components of the magnetic gear electric machine 1, such as the stator 20.

6A, in some embodiments, the end 126 of the shaft 125A opposite the head 128A is disposed in the second through hole 102A. In other words, the shaft 125A does not protrude from the second protruding portion 92A toward the side opposite the first protruding portion 91A. The entire end 126 is disposed in the second through hole 102A. Furthermore, the second protruding portion 92A illustrated in FIG. 6A has a blocking wall portion 95 that blocks the second through hole 102A from the side opposite the first protruding portion 91A. The blocking wall portion 95 completely blocks the second through hole 102A, and the second through hole 102A opens only toward the first protruding portion 91A side. The blocking wall portion 95 illustrated in the same figure is located radially inward of the end 126 of the shaft 125A and faces the end 126 in the radial direction.

According to the above configuration, the shaft portion 125A can be prevented from causing rotational resistance when the pole piece panel unit 50A rotates. Furthermore, the provision of the blocking wall portion 95 prevents air from entering the second insertion hole 102A, thereby enhancing the effect of suppressing the rotational resistance. Furthermore, the shaft portion 125A can be prevented from blocking the flow of cooling air around the pole piece panel unit 50A when the magnetic gear electric machine 1 is in operation. Furthermore, the provision of the blocking wall portion 95 prevents the cooling air from entering the second insertion hole 102A, thereby making the flow of cooling air smoother. As a result, the rotational resistance of the pole piece panel unit 50A can be suppressed, and the temperature rise of the pole piece panel unit 50A can be suppressed. In this paper, the concept of "air" includes "cooling air".
In addition, since the shaft portion 125A does not protrude into the air gap G1 (see FIG. 1), it is possible to prevent the shaft portion 125A from coming into contact with other components of the magnetic gear electric machine 1, such as the rotor 15.

The fixing member 120A as a fastening member shown in FIG. 6A is a screw in which the shaft portion 125A is fastened to the second insertion hole 102A. That is, the shaft portion 125A fits into the first insertion hole 101A in a loose fit state, and the male thread formed on the shaft portion 125A is screwed into the female thread formed on the inner circumferential surface that defines the second insertion hole 102A. On the other hand, the fixing member 120B as a fastening member shown in FIG. 6B employs a bolt fastening structure having a nut 129 that screws onto the shaft portion 125B. That is, the fixing member 120B has a bolt consisting of the shaft portion 125B and the head portion 128B, and a nut 129 that screws onto the shaft portion 125B.

In an embodiment in which the fixing member 120A is a screw, the number of parts of the fixing member 120A as a fastening member can be reduced compared to when the fastening members are bolts and nuts, and the configuration of the pole piece panel unit 50 can be simplified.

The fixing member 120A as a screw shown in FIG. 6A is a tapered screw. More specifically, the head 128A has a fastening tapered surface 127 whose outer diameter becomes shorter as it approaches the second protruding portion 92. The first protruding portion 91A has a first opening 65 that defines the first insertion hole 101A, and the first opening 65 has a tapered inner peripheral surface 66 and a straight inner peripheral surface 67. The tapered inner peripheral surface 66 is configured so that the inner diameter becomes smaller as it approaches the second protruding portion 92A, and the straight inner peripheral surface 67 extends linearly from one end of the tapered inner peripheral surface 66 radially inward. The tapered inner peripheral surface 66 of the head 128A is pressed against the fastening tapered surface 127, and a part of the shaft portion 125A is disposed inside the straight inner peripheral surface 67.

According to the above configuration, part of the force generated when the fastening tapered surface 127 of the head 128A presses against the tapered inner peripheral surface 66 functions as a force pressing the first protrusion 91A against the second main body portion 82 (see arrows T and R). This makes it possible to more firmly fix the first peripheral end portion 71 and the second peripheral end portion 72, and further improve the rigidity of the pole piece panel unit 50.
Furthermore, in an embodiment in which a sheet material 170 is interposed between the first protrusion 91A and the second main body portion 82, the first protrusion 91A is pressed against the radial extending portion 172 of the sheet material 170, and the radial extending portion 172 can be in close contact with the first protrusion 91A and the second main body portion 82, thereby allowing the vibration-damping function of the sheet material 170 to be fully exerted.

6. Fixing member 120 according to second embodiment
7 is a schematic diagram of a fixing member 120C (120) according to the second embodiment. The fixing member 120C is a component of the pole piece panel unit 50C (50). The pole piece panel unit 50C is provided with a first protruding portion 91C (91) and a second protruding portion 92C (92). The first protruding portion 91C has a first insertion hole 101C (101), and the second protruding portion 92C has a second insertion hole 102C (102). The pole piece panel unit 50C shown in the figure includes the above-mentioned sheet material 170, but the sheet material 170 is not an essential component of the pole piece panel unit 50C.

The fixing member 120C includes a shaft portion 125C (125), which is composed of multiple parts. More specifically, the shaft portion 125C has a cylindrical first shaft portion 251 that is inserted into the first insertion hole 101C and a second shaft portion 252 that is inserted into the second insertion hole 102C. A part of the second shaft portion 252 is housed in the first shaft portion 251, and the other part of the second shaft portion 252 protrudes radially inward from the first shaft portion 251. In addition, the second shaft portion 252 is supported by the first shaft portion 251 in a state in which it can move linearly relative to the first shaft portion 251.

The fixing member 120C further includes a pair of first nuts 211 that screw onto the outer periphery 251A of the first shaft portion 251, and a second nut 222 that screw onto the outer periphery 252A of the second shaft portion 252. The pair of first nuts 211 radially sandwich the first protruding portion 91C, and the second nut 222 radially sandwiches the second protruding portion 92C. This causes the fixing member 120 to be fixed to the first protruding portion 91C and the second protruding portion 92C. The first shaft portion 251 can be displaced radially together with the first protruding portion 91C, and the second shaft portion 252 can be displaced radially together with the second protruding portion 92C.

In some embodiments, the fixed member 120C is a dashpot. More specifically, the fixed member 120C further includes a spring 203 housed in the cylindrical first shaft portion 251 and brake oil 205 filled in the first shaft portion 251.

The spring 203 biases the second shaft portion 252 in a direction in which the second shaft portion 252 protrudes from the first shaft portion 251. In the example of FIG. 7, the second shaft portion 252 is biased radially inward by the spring 203. The brake oil 205 applies a braking force to the linear movement of the second shaft portion 252. In other words, when the second shaft portion 252 moves linearly, the brake oil 205 applies a braking force to the second shaft portion 252 in the opposite direction to the movement of the second shaft portion 252.

When the first circumferential end 71 and the second circumferential end 72 move relative to each other in the radial direction due to a radial force being generated as an excitation force, the second shaft portion 252 moves linearly relative to the first shaft portion 251. This allows the fixing member 120C to absorb the excitation force at least in one of the first circumferential end 71 or the second circumferential end 72.

According to the above configuration, even if an excitation force acts on at least one of the first peripheral end 71 and the second peripheral end 72, the force is absorbed by the fixed member 120C by the second shaft portion 252 moving linearly relative to the first shaft portion 251. This can further improve the vibration isolation function of the pole piece panel unit 50.
The fixed member 120C is not limited to being a dashpot. The fixed member 120C may not include the spring 203 and the damping oil 205, and instead, a gas such as air may be sealed inside the first shaft portion 251. Even in this case, when the first protruding portion 91C and the second protruding portion 92C are displaced in a direction approaching each other, the second shaft portion 252 moves linearly in a direction entering the first shaft portion 251, and the fixed member 120C suppresses the linear movement of the second shaft portion 252. Therefore, it is possible to absorb the excitation force generated in at least one of the first protruding portion 91C or the second protruding portion 92C.

In addition, according to an embodiment in which the spring 203 and the brake oil 205 are housed in the first shaft portion 251, when the second shaft portion 252 moves linearly relative to the first shaft portion 251, the spring 203 elastically deforms and the brake oil 205 applies a braking force to the second shaft portion 252. This makes it possible to suppress the linear movement of the second shaft portion 252, thereby improving the vibration-proofing function of the pole piece panel unit 50.

The first protrusion 91C has an outer end surface 911 and an inner end surface 912, which are both radial end surfaces. A recess 915 is formed in each of the outer end surface 911 and the inner end surface 912. A pair of first nuts 211 are disposed in each of the pair of recesses 915. The space formed inside each of the recesses 915 constitutes a part of the first through hole 101C. In the illustrated embodiment, the first nut 211 on the outer side in the radial direction is disposed in the recess 915 formed in the outer end surface 911. In other words, at least a part of the first nut 211 is disposed in the first through hole 101C. It is preferable that the entire portion of the first nut 211 is disposed in the first through hole 101C.

The above configuration can prevent the first nut 211 on the radial outside from creating rotational resistance when the pole piece panel unit 50C rotates. In addition, when the magnetic gear electric machine 1 is in operation, the first nut 211 can be prevented from blocking the flow of cooling air around the pole piece panel unit 50C, thereby preventing a rise in temperature of the pole piece panel unit 50C. In addition, since the first nut 211 can be prevented from protruding radially outward from the pole piece panel 60, it is possible to prevent the first nut 211 from coming into contact with other components of the magnetic gear electric machine 1, such as the stator 20.

A recess 925 is formed on each of the outer end surface 921 and the inner end surface 922, which are both radial end surfaces of the second protrusion 92C. A pair of second nuts 222 are arranged in each of the pair of recesses 925. The space formed inside each recess 925 constitutes a part of the second insertion hole 102C. In the illustrated embodiment, the second nut 222 located radially inner among the pair of second nuts 222 is arranged in the recess 925 formed in the inner end surface 922. In other words, at least a part of the second nut 222 is arranged in the second insertion hole 102C. It is preferable that the entire portion of the second nut 222 is arranged in the second insertion hole 102C.

The above configuration can prevent the second nut 222, which is separated from the first protrusion 91C, from creating rotational resistance when the pole piece panel unit 50C rotates. In addition, when the magnetic gear electric machine 1 is in operation, the second nut 222 can be prevented from blocking the flow of cooling air around the pole piece panel unit 50C, thereby preventing a rise in temperature of the pole piece panel unit 50C. In addition, since the second nut 222 can be prevented from protruding radially inward from the pole piece panel 60, it is possible to prevent the second nut 222 from coming into contact with other components of the magnetic gear electric machine 1, such as the rotor 15.

The inner end surface 912 of the first protruding portion 91C and the outer end surface 921 of the second protruding portion 92C may sandwich the sheet material 170. In this case, at least a part of the first nut 211 is disposed in the recess 915 formed in the inner end surface 912, and at least a part of the second nut 222 is disposed in the recess 925 formed in the outer end surface 921, so that the first nut 211 and the second nut 222 can be prevented from interfering with the placement of the sheet material 170. Note that the entire portion of the first nut 211 is disposed in the recess 915 of the inner end surface 912, and the entire portion of the second nut 222 is disposed in the recess 925 of the outer end surface 921, so that the sheet material 170 is more easily placed.

7. Example of Assembly of Pole Piece Panel Unit 50
8 is a schematic diagram showing a method of assembling a pole piece panel unit 50 according to an embodiment of the present disclosure. In the example of FIG. 8, the pole piece panel unit 50 is formed by four pole piece panels 60 arranged in the circumferential direction. More specifically, the pole piece panel 60 includes a first pole piece panel 61, two second pole piece panels 62, and a third pole piece panel 63. The first pole piece panel 61 is adjacent to the second pole piece panel 62 and the third pole piece panel 63 in the circumferential direction. In other words, the third pole piece panel 63 is disposed on the opposite side of the first pole piece panel 61 from the second pole piece panel 62.

In addition to the components described above, the first pole piece panel 61 further includes a first prescribed circumferential end 77, which is the end opposite the first circumferential end 71. The first prescribed circumferential end 77 has a first prescribed main body portion 87 extending in the axial direction and a first prescribed protruding portion 97 protruding to the other circumferential side from the first prescribed main body portion 87. The configuration of the second pole piece panel 62 is as described above, so a detailed description will be omitted.

The third pole piece panel 63 includes a third circumferential end portion 73, which is an end portion on one side in the circumferential direction. The third circumferential end portion 73 has a third main body portion 83 extending in the axial direction, and a third protruding portion 93 that protrudes further to one side in the circumferential direction than the third main body portion 83. The third protruding portion 93 is aligned radially with the first defined protruding portion 97. In other words, the third protruding portion 93 and the first defined protruding portion 97 overlap each other in the circumferential direction.

In the illustrated embodiment, the first protrusion 91 of the first pole piece panel 61 is located radially outward from the second protrusion 92 of the second pole piece panel 62, and the first defined protrusion 97 of the first pole piece panel 61 is located radially outward from the third protrusion 93 of the third pole piece panel 63. According to the above configuration, in the assembly process of the pole piece panel unit 50, the first pole piece panel 61 can be brought closer to the second pole piece panel 62 and the third pole piece panel 63 from the radial outside, thereby improving the assembly process of the pole piece panel unit 50.

8. Summary
Some of the above-described embodiments can be understood as follows, for example.

1) A pole piece panel unit (50) according to at least one embodiment of the present disclosure comprises:
A pole piece panel unit including a plurality of pole piece panels (60) including a plurality of pole pieces (55) and a plurality of non-magnetic bodies (53) alternately arranged along a circumferential direction based on an axis line (S),
A first pole piece panel (61) including a first circumferential end portion (71) which is an end portion on one side in the circumferential direction;
a second pole piece panel (62) adjacent to the first pole piece panel in the circumferential direction, the second pole piece panel including a second circumferential end portion (72) which is an end portion on the other side in the circumferential direction;
Equipped with
The first peripheral end portion is
A first body portion (81) extending in an axial direction;
a first protruding portion (91) protruding toward the one side in the circumferential direction more than the first main body portion,
The second peripheral end portion is
A second body portion (82) extending in the axial direction;
a second protruding portion (92) that protrudes toward the other side in the circumferential direction relative to the second main body portion and is aligned radially with the first protruding portion,
The device further includes a fixing member (120) that includes an axis portion (125) that is inserted into a first insertion hole (101) formed in the first protrusion and a second insertion hole (102) formed in the second protrusion, and is fixed to the first protrusion and the second protrusion.

According to the configuration of 1) above, a fixing member including an axis portion inserted into the first insertion hole and the second insertion hole is fixed to the first protrusion and the second protrusion, improving the rigidity of the pole piece panel unit. This makes it possible to suppress deflection of the pole piece panel unit even when an excitation force acts on the pole piece panel unit. This realizes a pole piece panel unit with improved vibration isolation function.

2) In some embodiments, the pole piece panel unit according to 1) above,
The fixing member is a fastening member further including a head portion (128) having an outer diameter larger than that of the shaft portion and pressing the first protrusion portion against the second protrusion portion.

According to the configuration of 2) above, the head presses the first protrusion against the second protrusion, thereby firmly fixing the first protrusion to the second protrusion. This improves the rigidity of the pole piece panel unit, and improves the vibration-proofing function of the pole piece panel unit.

3) In some embodiments, the pole piece panel unit according to 2) above,
At least a portion of the head is disposed in the first insertion hole.

The configuration of 3) above can prevent the head from creating rotational resistance when the pole piece panel unit rotates. In addition, when the magnetic gear electric machine is in operation, the head can be prevented from blocking the flow of cooling air around the pole piece panel unit, thereby preventing a rise in temperature of the pole piece panel unit.

4) In some embodiments, the pole piece panel unit according to 2) or 3) above,
The end (126) of the shaft opposite the head is disposed in the second insertion hole.

The configuration of 4) above can prevent the shaft from creating rotational resistance when the pole piece panel unit rotates. In addition, when the magnetic gear electric machine is in operation, the shaft can be prevented from blocking the flow of cooling air around the pole piece panel unit, thereby preventing a rise in temperature of the pole piece panel unit.

5) In some embodiments, the pole piece panel unit according to any one of 2) to 4) above,
The fastening member is a screw whose shaft portion is fastened in the second insertion hole.

The configuration of 5) above allows the number of fastening members to be reduced compared to when the fastening members are bolts and nuts, and simplifies the configuration of the pole piece panel unit.

6) In some embodiments, the pole piece panel unit according to 5) above,
The screw is a tapered screw in which the outer diameter of the head portion becomes smaller as the head portion approaches the second protruding portion,
The first protrusion has a first opening (65) that defines the first insertion hole,
The first opening has a tapered inner circumferential surface (66) that has an inner diameter that decreases toward the second protruding portion and against which the head presses.

According to the configuration of 6) above, part of the force generated by the head of the tapered screw pressing against the tapered inner surface functions as a force pressing the first protrusion against the second main body. This makes it possible to more firmly fix the first peripheral end and the second peripheral end, further improving the rigidity of the pole piece panel unit.

7) In some embodiments, the pole piece panel unit according to 5) or 6) above,
The second protrusion has a blocking wall portion (95) that blocks the second insertion hole from the side opposite to the first protrusion.

According to the configuration of 7) above, the blocking wall portion prevents air from entering the second insertion hole, so that the rotational resistance of the pole piece panel unit can be reduced and the temperature rise of the pole piece panel unit can be reduced.

8) In some embodiments, the pole piece panel unit according to any one of 1) to 7) above,
In the axial direction, each of the non-magnetic bodies is longer than each of the pole pieces;
the first pole piece panel includes a first non-magnetic body constituting at least a portion of the first peripheral end portion, the first non-magnetic body constituting a portion of a specific one of the non-magnetic bodies (53A);
The second pole piece panel includes a second non-magnetic body (53B) that constitutes at least a portion of the second peripheral end and that constitutes the other portion of the particular non-magnetic body.

A non-magnetic body that is longer in the axial direction than the pole piece is prone to bending in the radial direction. In this regard, according to the configuration of 8) above, the first non-magnetic body is joined to the second non-magnetic body by a fixing member, so that the rigidity of the non-magnetic body in the radial direction can be increased, and the vibration-proofing function of the pole piece panel unit can be improved.

9) In some embodiments, the pole piece panel unit according to any one of 1) to 4) above,
The shaft portion is
A cylindrical first shaft portion (251) that is inserted into the first insertion hole;
a second shaft portion (252) that is partially received in the first shaft portion and is provided to pass through the second insertion hole;
The fixing member is
A pair of first nuts (211) that are screwed onto an outer circumferential portion (251A) of the first shaft portion and sandwich the first protruding portion in the radial direction;
a pair of second nuts (222) that are screwed onto an outer circumferential portion (252A) of the second shaft portion and that sandwich the second protruding portion in the radial direction;
and

According to the configuration of 9) above, even if a radial force acts on at least one of the first peripheral end portion or the second peripheral end portion, the force is absorbed by the fixed member as the second shaft portion moves linearly relative to the first shaft portion. This further improves the vibration-proofing function of the pole piece panel unit.

10) In some embodiments, the pole piece panel unit according to 9) above,
The fixing member is
a spring (203) accommodated in the first shaft portion and biasing the first shaft portion in a direction in which the first shaft portion protrudes from the second shaft portion;
The hydraulic system further includes a damping oil (205) that is filled in the first shaft portion and that applies a damping force to the linear movement of the second shaft portion.

According to the configuration of 10) above, the linear movement of the second shaft portion can be suppressed by the elastic deformation of the spring and the application of a braking force by the braking oil, thereby improving the vibration-proofing function of the pole piece panel unit.

11) In some embodiments, the pole piece panel unit according to 9) or 10) above,
At least a portion of the first nut of the pair of first nuts that is away from the second protruding portion is disposed in the first insertion hole.

The configuration of 11) above can prevent the first nut, which is separated from the second protrusion, from creating rotational resistance when the pole piece panel unit rotates. In addition, when the magnetic gear electric machine is in operation, the first nut can be prevented from blocking the flow of cooling air around the pole piece panel unit, thereby preventing a rise in temperature of the pole piece panel unit.

12) In some embodiments, the pole piece panel unit according to any one of 1) to 11) above,
The device further comprises a sheet material (170) that is at least elastic and is sandwiched between the first peripheral end and the second peripheral end.

According to the configuration of 12) above, even if a radial force is generated as an excitation force at at least one of the first peripheral end or the second peripheral end, the force is reduced by the restoring force generated in the deforming sheet material. This further improves the vibration-proofing function of the pole piece panel unit.

13) In some embodiments, the pole piece panel unit according to 12) above,
The sheet material is a viscoelastic rubber sheet having the elasticity and viscosity.

According to the configuration of 13) above, even if a radial force suddenly occurs at at least one of the first circumferential end portion or the second circumferential end portion, the force can be instantly reduced by the deformation of the sheet material, which is a viscoelastic rubber sheet.

14) In some embodiments, the pole piece panel unit according to 12) or 13) above,
The sheet material is disposed at least one between the first protrusion and the second main body portion, or between the second protrusion and the first main body portion, and includes a radial extending portion (172) extending in the radial direction.

According to the configuration of 14) above, even if a radial force occurs between the first protrusion and the second main body, or between the second protrusion and the first main body, the radial extension portion can absorb the force by deforming in the radial direction.

15) In some embodiments, the pole piece panel unit according to any one of 12) to 14) above,
The sheet material includes a circumferential extending portion (175) disposed between the first protruding portion and the second protruding portion and extending in the circumferential direction.

According to the configuration of 15) above, even if a radial force occurs between the first protrusion and the second protrusion as an excitation force, the circumferential extension portion can absorb the force by deforming in the radial direction.

16) In some embodiments, the pole piece panel unit according to 15) above,
The circumferentially extending portion has a hole (179) through which the shaft portion of the fixing member is inserted.

The configuration of 16) above makes it possible to arrange the circumferential extension portion around the shaft portion, expanding the area in which the circumferential extension portion is arranged. This improves the vibration-proofing function of the pole piece panel unit.

17) In some embodiments, the pole piece panel unit according to any one of 1) to 16) above,
The third pole piece panel (63) is disposed on the opposite side of the first pole piece panel from the second pole piece panel, and includes a third circumferential end portion (73) that is an end portion on one side in the circumferential direction.
The third peripheral end portion is
A third body portion (83) extending in the axial direction;
a third protruding portion (93) protruding toward the one side in the circumferential direction more than the third main body portion,
the first pole piece panel further includes a first defined circumferential edge (97) opposite the first circumferential edge;
The first specified circumferential end portion is
A first defining body portion (87) extending in the axial direction;
a first defining protrusion (97) that protrudes toward the other side in the circumferential direction relative to the first defining main body portion and is aligned with the third protrusion in the radial direction,
The first protruding portion is located radially outward of the second protruding portion,
The first defining protrusion is located outward in the radial direction relative to the third protrusion.

According to the configuration of 17) above, in the assembly process of the pole piece panel unit, the first pole piece panel can be brought closer to the second pole piece panel and the third pole piece panel from the radial outside, thereby improving the assembly of the pole piece panel unit.

18) A pole piece rotor (30) according to at least one embodiment of the present disclosure,
A pole piece panel unit (50) according to any one of 1) to 17) above;
a first connecting portion (31) connected to one end (51) of the pole piece panel unit in the axial direction and to a rotating shaft (5) of the magnetic gear electric machine (1);
a second connecting portion (32) connected to the other end (52) of the pole piece panel unit in the axial direction and to the rotating shaft;
Equipped with.

According to the configuration of 18) above, the rigidity of the pole piece panel unit is improved for the same reason as in 1) above. This makes it possible to suppress the deflection of the pole piece panel unit even when an excitation force such as centrifugal force acts on the pole piece panel unit. This realizes a pole piece rotor with improved vibration isolation capabilities.

19) The magnetic gear electric machine (1) according to at least one embodiment of the present disclosure comprises:
A pole piece rotor (30) according to the above 18),
a rotor (15) including a plurality of rotor magnets (19) arranged in the circumferential direction on the radially inner or outer side of the pole piece panel unit;
a stator (20) including a plurality of stator magnets (29) arranged in the circumferential direction on the opposite side of the pole piece panel unit from the plurality of rotor magnets;
Equipped with.

According to the configuration of 19) above, the rigidity of the pole piece panel unit is improved for the same reason as in 1) above. This makes it possible to suppress the deflection of the pole piece panel unit even when an excitation force such as centrifugal force or electromagnetic force acts on the pole piece panel unit. In addition, it is possible to make the natural frequency of the pole piece panel unit different from the frequency component of the excitation force caused by electromagnetic force, making it possible to avoid resonance of the pole piece panel unit.

1: Magnetic gear electric machine 5: Rotating shaft 15: Rotor 19: Rotor magnet 20: Stator 25: Stator core 27: Stator coil 29: Stator magnet 30: Pole piece rotor 31: First connecting portion 32: Second connecting portion 37: Ring portion 38: Shaft connecting portion 39: Extension portion 50: Pole piece panel unit 51: One end portion 52: Other end portion 53: Non-magnetic body 53A: First non-magnetic body 53B: Second non-magnetic body 55: Pole piece 56: End ring 59: End plate 60: Pole piece panel 61: First pole piece panel 62: Second pole piece panel 63: Third pole piece panel 65: First opening 66: Tapered inner peripheral surface 67: Straight inner peripheral surface 71: First peripheral end portion 72: Second peripheral end portion 73 : third circumferential end portion 77 : first prescribed circumferential end portion 81 : first main body portion 82 : second main body portion 83 : third main body portion 84 : second end face 85 : first end face 87 : first prescribed main body portion 91 : first protruding portion 92 : second protruding portion 93 : third protruding portion 94 : tip face 95 : closing wall portion 96 : tip face 97 : first prescribed protruding portion 98 : outer end face 99 : inner end face 101 : first insertion hole 102 : second insertion hole 120 : fixing member 125 : shaft portion 126 : end portion 127 : fastening tapered surface 128 : head portion 129 : nut 150 : pole piece panel unit 170 : sheet material 172 : radially extending portion 172A : first radially extending portion 172B : Second radial extension portion 175 : Circumferential extension portion 179 : Hole 203 : Spring 205 : Brake oil 211 : First nut 222 : Second nut 251 : First shaft portion 251A, 252A : Outer periphery 252 : Second shaft portion 911, 921 : Outer end surface 912, 922 : Inner end surface 915, 925 : Recess

Claims (19)

A pole piece panel unit including a plurality of pole piece panels each including a plurality of pole pieces and a plurality of non-magnetic bodies alternately arranged along a circumferential direction based on an axis line,
a first pole piece panel including a first circumferential end portion that is an end portion on one side in the circumferential direction;
a second pole piece panel adjacent to the first pole piece panel in the circumferential direction, the second pole piece panel including a second circumferential end portion that is an end portion on the other side in the circumferential direction;
Equipped with
The first peripheral end portion is
A first body portion extending in an axial direction;
a first protruding portion protruding toward the one side in the circumferential direction further than the first main body portion,
The second peripheral end portion is
A second body portion extending in the axial direction;
a second protruding portion that protrudes toward the other side in the circumferential direction relative to the second main body portion and is aligned in a radial direction with the first protruding portion,
a pole piece panel unit including an axis portion inserted into a first insertion hole formed in the first protrusion and a second insertion hole formed in the second protrusion, and further including a fixing member fixed to the first protrusion and the second protrusion. The pole piece panel unit according to claim 1 , wherein the fixing member is a fastening member further including a head portion having an outer diameter larger than that of the shaft portion, the head portion pressing the first protrusion portion against the second protrusion portion. The pole piece panel unit according to claim 2 , wherein at least a portion of the head is disposed in the first insertion hole. The pole piece panel unit according to claim 2 or 3, wherein an end of the shaft portion opposite to the head portion is disposed in the second insertion hole. 4. The pole piece panel unit according to claim 2, wherein the fastening member is a screw whose shaft portion is fastened in the second insertion hole. The screw is a tapered screw in which the outer diameter of the head portion becomes smaller as the head portion approaches the second protruding portion,
the first protrusion has a first opening that defines the first insertion hole,
The pole piece panel unit according to claim 5 , wherein the first opening has a tapered inner circumferential surface whose inner diameter decreases toward the second protruding portion, and against which the head presses. The pole piece panel unit according to claim 5 , wherein the second protrusion has a blocking wall portion that blocks the second insertion hole from the side opposite to the first protrusion. In the axial direction, each of the non-magnetic bodies is longer than each of the pole pieces;
the first pole piece panel includes a first non-magnetic body constituting at least a portion of the first peripheral end portion, the first non-magnetic body constituting a portion of a particular one of the non-magnetic bodies;
The second pole piece panel unit according to any one of claims 1 to 3, wherein the second pole piece panel includes a second non-magnetic material constituting at least a portion of the second peripheral end portion and a second non-magnetic material constituting the other portion of the specific non-magnetic material. The shaft portion is
A cylindrical first shaft portion that is inserted into the first insertion hole;
a second shaft portion that is partially received in the first shaft portion and that is provided to pass through the second insertion hole;
The fixing member is
a pair of first nuts that are screwed onto an outer periphery of the first shaft portion and that sandwich the first protruding portion in the radial direction;
a pair of second nuts that are screwed onto an outer periphery of the second shaft portion and that sandwich the second protruding portion in the radial direction;
The pole piece panel unit of claim 1 , further comprising: The fixing member is
a spring accommodated in the first shaft portion and biasing the first shaft portion in a direction in which the first shaft portion protrudes from the second shaft portion;
10. The pole piece panel unit according to claim 9, further comprising: a damping oil filled in said first shaft portion for applying a damping force to the linear movement of said second shaft portion. The pole piece panel unit according to claim 9 , wherein at least a portion of the pair of first nuts that is remote from the second protruding portion is disposed in the first insertion hole. 4. The pole piece panel unit according to claim 1, further comprising a sheet material having at least elasticity, the sheet material being sandwiched between the first peripheral end and the second peripheral end. The pole piece panel unit according to claim 12, wherein the sheet material is a viscoelastic rubber sheet having the elasticity and viscosity. The pole piece panel unit of claim 12, wherein the sheet material is disposed at least one of between the first protrusion and the second main body portion, or between the second protrusion and the first main body portion, and includes a radially extending portion extending in the radial direction. The pole piece panel unit according to claim 12 , wherein the sheet material includes a circumferential extending portion disposed between the first protruding portion and the second protruding portion and extending in the circumferential direction. The pole piece panel unit according to claim 15 , wherein the circumferential extending portion is formed with a hole through which the shaft portion of the fixing member is inserted. A third pole piece panel is disposed on the opposite side of the second pole piece panel across the first pole piece panel, the third pole piece panel including a third circumferential end portion which is an end portion on one side in the circumferential direction,
The third peripheral end portion is
A third body portion extending in the axial direction;
a third protruding portion protruding toward the one side in the circumferential direction further than the third main body portion,
the first pole piece panel further includes a first defined circumferential edge opposite the first circumferential edge;
The first specified circumferential end portion is
A first defining body portion extending in the axial direction;
a first defining protruding portion that protrudes toward the other side in the circumferential direction relative to the first defining main body portion and is aligned with the third protruding portion in the radial direction,
The first protruding portion is located radially outward of the second protruding portion,
The pole piece panel unit according to claim 1 , wherein the first defined protrusion is positioned radially outward of the third protrusion. A pole piece panel unit according to any one of claims 1 to 3;
a first connecting portion connected to one end of the pole piece panel unit in the axial direction and to a rotating shaft of a magnetic gear electric machine;
a second connecting portion connected to the other end of the pole piece panel unit in the axial direction and to the rotation shaft;
A pole piece rotor comprising: A pole piece rotor according to claim 18;
a rotor including a plurality of rotor magnets arranged in the circumferential direction on the inner or outer side of the radial direction with respect to the pole piece panel unit;
a stator including a plurality of stator magnets arranged in the circumferential direction on the opposite side of the pole piece panel unit from the plurality of rotor magnets;
1. A magnetic gear electric machine comprising:

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