TW201722035A - Axial gap-type rotary electric machine and rotary electric machine stator - Google Patents

Abstract

The purpose of the present invention is to prevent bearing voltage and to achieve miniaturization and high performance of a rotary electric machine. Provided is an axial gap-type rotary electric machine which has: a stator in which a plurality of core members having a stator core around which windings are wound in the circumferential direction are arranged annularly around a rotating shaft and are integrally molded with resin; a rotor facing a magnetic flux surface of the stator via a gap in the rotation axis direction; and a rotating shaft that co-rotates with the rotor and penetrates the rotation axis of the stator. The stator has a tubular shape along the outer peripheral shape of the rotation axis, and has a shielding member electrically shields the windings and the radially facing section of the rotating shaft. The shieling member has a plurality of connection holes at a constant density penetrating in the radial direction in the entire circumferential surface sandwiched between the windings and the radial facing section of the rotating shaft. The area ratio of the plurality of connection holes occupying the entire circumferential surface is greater than the area ratio of a portion outside of the plurality of connection holes, and resin is filled from an outer diameter side to an inner diameter side in at least a part of the shielding member via the connection holes.

Description

Axial gap type rotating electric machine and stator for rotating electric machine

The present invention relates to an axial gap type rotating electrical machine and a stator for a rotating electrical machine, and relates to a stator for a rotating electrical machine molded by a resin and a rotating electrical machine having the stator.

An axial gap type rotating electric machine is known as a mechanism effective for reducing the thickness and efficiency of a rotating electrical machine. Patent Document 1 discloses an axial gap type rotating electric machine in which a plurality of stator core members are arranged in a ring shape, and two rotors are disposed so as to sandwich the stator from both sides in the axial direction, and the magnetic flux surfaces thereof are The axial direction is opposite to a specific gap.

In general, the axial gap type rotating machine is proportional to the square of the diameter of the stator and the rotor (hereinafter referred to as the "gap area"), so the thinner the shape, the more Improve the output or efficiency of the unit body. In particular, since the rotor can be configured relatively easily, the development of an axial gap type rotating electric machine using a permanent magnet such as a crucible or a ferrite is also being advanced.

In the case where the inverter drives the permanent magnet type rotating electrical machine, the torque is obtained by flowing a current synchronized with the position of the magnet in the winding. At this time, the common mode voltage generated by the inverter is electrostatically coupled to the rotor side, and a voltage is generated between the inner and outer wheels of the bearing (hereinafter referred to as "axis voltage"). It is known that an excessive shaft voltage will cause electrical corrosion of the bearing and reduce the life of the bearing. In the axial gap type rotating electric machine, the structure in which two rotors are placed so as to sandwich the stator, or the structure in which two stators are arranged to sandwich the rotor is sometimes used, and the gap area of the unit body is increased. More efficient production of torque and other designs. The tendency of such a winding and the opposing area of the rotor to expand is caused by the tendency of the shaft voltage to increase.

Further, in the axial gap type rotating electrical machine, since the mechanical shaft penetrates the center of the stator in the radial direction, the windings are concentrically opposed to the mechanical shaft. In general, in order to reduce the size, output, efficiency, and cost of the rotating electrical machine, it is effective to arrange the magnetic core or the electric wire in a limited space, that is, to improve space utilization. Therefore, the distance between the winding and the mechanical shaft is close to each other, and the influence on the shaft voltage cannot be further ignored.

As one of the methods for reducing the shaft voltage, it is known that electrostatic shielding between the winding and the rotor is effective. The above-mentioned Patent Document 1 discloses a configuration in which a plate-shaped conductive material shielding coil that electrically connects a stator core and a case is interposed between a rotor, and further, between a mechanical shaft and a winding that is concentrically opposed thereto. A cylindrical shield member having a peripheral shape along the mechanical axis prevents the occurrence of a shaft voltage by electrically connecting the shield member to the casing with the conductive material.

This structure shields most of the electrostatic capacitance generated between the winding and the rotor and the mechanical shaft. Therefore, it is possible to greatly reduce the structure of the axial voltage of the axial gap type rotating electrical machine by shielding the static electricity generated in the region.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2014-17915

It is considered to reduce the size and density of the axial gap rotating electrical machine. Although miniaturization or high density can be achieved by promoting simplification or thinning of each constituent member, in general, there is a tendency to reduce the thickness and strength. For example, even if the shield member disclosed in Patent Document 1 is made thinner, the gap between the winding and the mechanical axis can be further reduced, and the output can be increased by miniaturization in the radial direction or increasing the coil volume ratio. Miniaturized relative to the rating.

Here, an example of a procedure for molding a stator of an axial gap type rotating electrical machine with a resin will be described using a drawing. In Fig. 1, one of the steps of the resin molding step of the stator is schematically shown. As shown in the axial longitudinal sectional view of Fig. 1(a), the mold 201 is inserted from the inner cylinder side of the casing 50 substantially in the same diameter as the inner diameter of the casing. As shown in the front view from the direction of the rotation axis of Fig. 1(b), on the upper surface of the lower mold 201, a plurality of core members X are arranged in a ring shape around the rotation axis. A cylinder or rod-shaped core 202 is disposed at an axis through which the mechanical shaft is inserted. The core material 202 has a diameter in which the outer circumference of the mechanical shaft is not in contact with the stator after the mold. Further, a cylindrical shield member X along the outer peripheral shape of the core 202 is disposed between the outer peripheral surface of the core member 202 and the stator winding 220.

After the lower mold 201, the core member 200, the core member 202, and the shield member X are disposed, the mold is inserted into a mold (not shown) having substantially the same diameter as the inner diameter of the casing 50. In the upper mold or the lower mold, a hole in which a resin is sealed on the stator side is provided, and the resin is sealed at a specific pressure. Thereafter, when the upper mold, the core 202, and the lower mold 201 are pulled out from the casing 50, a resin molded stator fixed to the casing 50 and having the surface molded thereon can be obtained. Further, the shield member X is held in the center of the stator, and a part of the shield member X is electrically connected to the case 50 by a conduction plate, thereby preventing the shaft voltage.

In order to obtain sufficient holding strength of the stator formed by the mold, it is necessary to uniformly fill the resin to the gap of the above-mentioned parts. Therefore, in terms of ensuring the reliability of higher strength, there are many cases where the sealing pressure of the resin is set to a high pressure. The shield member X which is thinned to be miniaturized is deformed by the pressure of the high-pressure sealing resin, and as a result, there is a possibility that the necessary clearance to the mechanical shaft side or the uniform filling of the resin or the like cannot be achieved. For example, as shown by the symbol c of Fig. 1(b), the bending deformation of the shield member X causes uneven filling of the resin 30.

Explain the influence of the deformation of the shielding member on the rotating electrical machine. First, (1) because the shielding area between the winding and the mechanical shaft is reduced, the effect of reducing the shaft voltage is reduced. Further, (2) since the shield member is close to the winding, it is difficult to stably ensure the electrical insulation distance. Further, (3) a resin layer having a thickness or a positional deviation is formed inside the shield member, so that the resin is detached due to vibration or thermal stress during operation of the rotary electric machine, and the resulting rotation The noise or breakage of the motor.

A technique for ensuring reliability with respect to bearing power and achieving miniaturization, high density, or performance is desired.

In order to solve the above problems, for example, the configuration described in the patent application scope is applied. That is, the present invention is an axial gap type rotating electric machine configured to include a stator in which a plurality of core members having stator cores wound in a circumferential direction are arranged in a ring shape around a rotation axis. a rotor integrally molded with a resin; the rotor is opposite to a magnetic flux surface of the stator in a direction of a rotation axis; and a rotating shaft co-rotating with the rotor to penetrate a rotation axis of the stator And the stator includes a tubular member having a cylindrical shape along the outer circumference of the rotating shaft and electrically shielding the winding and the radial opposing portion of the rotating shaft, wherein the shielding member is coupled to the winding and the rotating The entire circumferential surface of the axially opposite portion of the shaft has a plurality of communicating holes penetrating in the radial direction at a fixed density, and the ratio of the area of the plurality of communicating holes to the entire peripheral surface is larger than the plurality of communicating holes In part of the area ratio, at least a part of the shield member is filled with the resin from the outer diameter side to the inner diameter side via the communication hole.

Further, as another configuration, the present invention is, for example, an axial gap type rotating electric machine configured to include a stator in which a plurality of core members having stator cores wound in a circumferential direction are arranged around a rotating shaft Forming a ring and molding the resin integrally; the rotor is opposite to the magnetic flux surface of the stator in a direction of a rotation axis; and a rotating shaft co-rotating with the rotor to penetrate the stator a rotating shaft center; and the stator system includes a tubular member having a cylindrical shape extending along a peripheral shape of the mechanical shaft, and electrically shielding the winding member from a radial opposing portion of the rotating shaft, wherein the shielding member comprises a mesh member At least a part of the shield member is filled with the resin from the outer diameter side to the inner diameter side via the mesh of the mesh member.

Furthermore, for example, the present invention is a stator for a rotating electrical machine, which is configured to a plurality of core members having a stator core that winds a winding in a circumferential direction and generates a magnetic flux in a direction of a rotating shaft, and a plurality of core members are arranged in a ring shape around a rotating shaft, and are molded by resin into a one-piece annular body; and the above-mentioned stator system a member having: a through hole for inserting a rotating shaft; and a shielding member formed into a cylindrical shape along an outer peripheral shape of the rotating shaft, electrically shielding a radial opposing portion of the winding and the rotating shaft; and the shielding The member is a whole peripheral surface sandwiched by the radial opposite portion of the winding and the rotating shaft, and has a plurality of communicating holes penetrating in the radial direction at a fixed density, and the plurality of communicating holes occupy an area ratio of the entire peripheral surface The area ratio of the portion other than the plurality of communication holes is such that at least a part of the shield member is filled with the resin from the outer diameter side to the inner diameter side via the communication hole.

According to an aspect of the present invention, it is possible to achieve suppression of electrical corrosion of the bearing by reducing the shaft voltage, miniaturization, high output, high efficiency, and low cost.

The problems, configurations, and effects other than the above can be explained from the following description.

10‧‧‧ Stator

20‧‧‧ core components

21‧‧‧ magnetic core

22‧‧‧Winding

23‧‧‧Winding tube

24‧‧‧Chapter

24a‧‧‧Axis direction front end

25‧‧‧ Tube

30‧‧‧Resin

40‧‧‧Rotor

41‧‧‧ permanent magnet

42‧‧‧ Back yoke

43‧‧‧ yoke

50‧‧‧shell

60‧‧‧End bracket

70‧‧‧ mechanical shaft

80‧‧‧ bearing

90‧‧‧Shielding members

91‧‧‧Connecting holes

93‧‧‧Connecting components

94‧‧‧ Grounding terminal

95‧‧‧Clamping terminal

96‧‧‧Blind rivets

100‧‧‧Motor

200‧‧‧ core components

201‧‧‧Down

202‧‧ ‧ core

220‧‧‧ winding

230‧‧‧winding tube

A‧‧‧Rotary axis

C‧‧‧ symbol

X‧‧‧Shielding members

1(a) and (b) are diagrams for explaining the prior art.

Fig. 2 is an axial longitudinal sectional view showing a motor to which an embodiment of the present invention is applied.

3(a) and 3(b) are schematic perspective views showing the configuration of the core member of the embodiment.

Fig. 4 is a longitudinal sectional perspective view showing an arrangement example of the shield member of the embodiment.

Fig. 5 is a schematic view for explaining the communication hole of the shield member of the embodiment.

Fig. 6 (a) and (b) are schematic views showing the form of a resin molding step in the case where the shield member of the present embodiment is applied.

Fig. 7 is a perspective view schematically showing a configuration example of the shield member of the embodiment.

8(a) to 8(c) are schematic views showing a member example of the shield member of the present embodiment.

Fig. 9 is a longitudinal sectional perspective view showing the configuration of the grounding conducting member of the embodiment.

Fig. 10 (a) and (b) schematically show the grounding structure of the conduction member of the present embodiment.

Example 1

Hereinafter, the first embodiment of the present invention will be described using the drawings. In Fig. 2, an axial longitudinal sectional view of a motor 100 to which an embodiment of the present invention is applied is shown. The motor 100 is a double-rotor type axial gap type permanent magnet synchronous motor, and includes one stator 10 in an annular shape and two rotors 40 in a disk shape arranged to sandwich the stator from the axial direction. And the magnetic flux planes thereof are opposed to each other by a specific air gap in the direction of the rotation axis.

The stator 10 is configured such that a plurality of core members 20 are arranged in a ring shape in the radial direction around the mechanical shaft 70. The plurality of core members 20 are integrally molded by the resin 30 in the casing 50. . By the mold, the plurality of core members 20 have an annular body having a through hole for inserting the rotary shaft 70 at the center, and are integrally fixed to the inside of the casing. Further, the present invention is not limited to the mold in the casing 50, and may be applied to a resin mold which is formed by using a forming die to obtain a stator.

In Fig. 3, a perspective view of the core member 20 is schematically shown. As shown in Fig. 3(a), the core member 20 includes a magnetic core 21, a winding 22 wound around the outer circumference of the magnetic core, and a bobbin 23 disposed between the cores for insulation. The magnetic core 21 is a metal core formed by laminating steel sheets, thick powder, and cutting. In the present embodiment, a magnetic core having a cylindrical shape in which an amorphous foil tape having a thickness of about 0.1 to 0.3 mm is laminated in the radial direction is used.

In Fig. 3(b), a perspective view of the bobbin 23 is shown. The bobbin 23 includes an insulating member such as a resin, and has a cylindrical shape that is formed along the outer peripheral shape of the magnetic core 21. Further, the insulating member may be replaced by an insulating paper or an insulating agent applied to the winding, and the present invention is not limited to the examples. The core member 20 is obtained by winding the winding 22 around the bobbin 23 in which the inner core is inserted with the magnetic core 21, or inserting the magnetic core 21 into the inner cylinder of the bobbin 23 in which the outer tube is wound with the winding 22. Further, the bobbin 23 is attached to both end edges of the axial direction, and has a collar portion 24 extending a certain distance width in the rotational direction of the outer circumference of the tubular portion, and a cylinder extending axially between the flange portions. unit 25. In the present embodiment, the front end 24a of the collar portion 24 in the rotational axis direction is in contact with the shield member 90, functions as a positioning member of the core member 20, and has a function of determining the winding limit of the winding 22. That is, since the winding 22 and the shield member 90 must not be in contact with each other, it is possible to define the position of the winding from the root portion of the tubular portion 25 to the tip end 24a that does not reach the rotational axis direction.

Returning to Fig. 1, the rotor 40 includes a permanent magnet 41 disposed opposite the magnetic core 21, a yoke 42 disposed on the back surface of the permanent magnet 41, and a yoke 43 holding the same. The yoke 43 is an annular body having a through hole at the center, and the through hole is coupled to the mechanical shaft 70. Similarly, the mechanical shaft 70 is provided with a bearing 80 on the load side and the counter load side. The end bracket plate 60 rotatably holds the mechanical shaft 70 and the rotor 40 via the bearing 80. The end bracket 60 is mechanically coupled to the housing 50. The housing 50 is held in an electrically grounded state.

On the inner diameter side of the winding 22, there is a shielding member 90 which is one of the features of the embodiment. In Fig. 4, a perspective view of the shield member 90 is shown. The shield member 90 has a cylindrical shape having at least an axial length greater than the axial width of the winding 22 opposite to the outer circumference of the mechanical shaft 70, and electrically shields the member. The shield member 90 may be formed by rounding the flat member to form a tubular shape, or may be a tubular member that is formed without being seamed by molding. In the present embodiment, the shield member 90 is obtained from a member having a thin wall thickness (for example, a sheet member) for the purpose of miniaturization in the radial direction or the like.

Further, the shield member 90 has a plurality of communication holes 91 which are integrally penetrated in the radial direction. The communication hole 91 is densely arranged to a degree that the ratio of the area occupied by the circumferential surface of the shield member 90 is larger than the area of the portion other than the communication hole 91. Preferably, the communication hole 91 is provided in the rotation axis direction and the circumferential direction of the shield member 91, and is regularly arranged at regular intervals (density is fixed). Thereby, the flow path resistance of the shield member to the resin 30 is made uniform, and the deformation of the shield member 90 can be more effectively suppressed.

As a more specific example, it is preferable that the size of each of the communication holes 91 is equal, and the adjacent communication holes 91 have a high density or a distance from the top, bottom, left, and right. That is, the reason is that, as schematically shown in FIG. 5, if the communication hole 91 is dense, the flow path resistance becomes uneven. The pressure distribution from the resin is generated uniformly, and the strength of the shield member 90 also becomes uneven, so that the possibility of deformation is high. Further, for example, it can be said that the width or height of the communication port is preferably larger than the thickness of the shield member 90. The reason for this is that the flow path resistance when the resin 30 passes through the communication hole 91 can be effectively reduced, and the deformation of the inner circumferential shield plate can be suppressed.

The resin that has entered from the outer diameter side by the sealing passes through the communication hole 91, and immediately flows through the other communication hole 91 from the inner diameter side toward the outer diameter, thereby reducing the resistance of the shield member 90 to the resin. And prevent deformation. As a configuration suitable for obtaining this effect, in the example of Fig. 4, a metal member having a mesh shape is used in the present embodiment. Further, each of the grid-like mesh functions as the communication hole 91. In this aspect, since the connection portion between the resin 30 layer on the inner diameter side of the shield member 90 and the resin 30 layer on the outer diameter side is more uniformly dispersed, the holding strength of the resin 30 layer on the inner diameter side is equalized. Thereby, the detachment of the resin 30 layer on the inner diameter side can be effectively suppressed.

Further, since a part of the magnetic fluxes in the shield member 90 are interlinked, an eddy current flows on the surface and becomes a loss. When a plurality of communication holes 91 are provided, since the flow path of the eddy current is increased, the resistance of the shield member 90 is equivalently increased. Thereby, the eddy current loss of the shield member 90 is reduced, and the effect of improving the motor efficiency can also be obtained.

Fig. 6 shows the steps of encapsulating the resin and the form after molding in the case where the shield member 90 is applied.

As representative resin molding, there are vacuum casting, transfer molding, injection molding, and the like. Transfer molding or injection molding suppresses the generation of bubbles by applying a higher pressure to inject the resin. Although the load of the resin on the workpiece is also present due to the high pressure, it has the advantage of greatly shortening the molding time.

In vacuum casting, air is removed by injecting resin into the workpiece under low pressure conditions, and generation of bubbles is suppressed. The load on the workpiece such as the shielding material or the core member is small, and the molding time becomes long. In the present embodiment, transfer molding and injection molding are applied, but the present invention is also effective in obtaining a effect in the case of vacuum casting.

As shown in the longitudinal cross-sectional view of Fig. 6(a), the shield member 90 is disposed in a portion of the core 202 that faces the winding 22. The shield member 90 is disposed to be wound around the core 202. A casing 50 is disposed on the outer diameter side of the core member 20, the lower mold 201, and the upper mold (not shown). The forming mold and the core member 20 are temperature-controlled by a heater or the like assembled in a mold. In the upper mold, 1 to a plurality of openings are provided, and the resin 30 is injected in a few seconds to several 10 seconds. The resin 30 to be injected is integrally filled with a gap between the core members 20 or between the core member 20 and the casing 50 as a flow path. To the resin 30, for example, a pressure of several MPa to several tens of MPa is applied.

In Fig. 6(b), the BB' profile after molding is shown. A plan view of the stator 10, the housing 50, and the shield member 90 is shown. It is understood that one portion of the shield member 90 protrudes toward the outer diameter side, and the resin 30 is adhered between the protruding portion and the core 202. The shielding member 90 is disposed between the winding 22 and the mechanical shaft 70 substantially undeformed, and can be electrically shielded.

Further, Fig. 6(b) is an example, and may be different in the case where the resin is sealed each time. For example, in Fig. 6(b), the form in which the resin is entirely wound between the core 202 and the shield member is shown, but it is also conceivable that the resin does not wrap around to one of the inner diameters, and the surface is exposed on the side of the core 202. Further, there is a case where the shield member 90 slightly expands toward the outer diameter side. This is caused by the expansion of the resin invading to the inner diameter side toward the outer diameter side. Such unevenness is caused by the difference in the material itself, and also by the shape of the flow path formed in the gap of the member or the temperature distribution of the member or other environmental factors (air temperature, air pressure, etc.), and it is often difficult to obtain the same result. .

However, in either case, the amount of deformation or positional offset is sufficient to make electrical or magnetic shielding of the winding portion opposite the mechanical shaft 70. That is, the reason is that the communication holes 91 of the same size are arranged at equal density and at equal intervals, so that the resistance applied to the shield member 90 is small, and the pressure distribution and/or regularity of the resin are less likely to occur, thereby ensuring The strength of the shield member 90.

In particular, the communication hole 91 intrudes into the resin from the outer diameter toward the inner diameter, and the invading resin easily passes through the outer diameter side, and the shield member 91 is held by the resin by the winding. It is almost impossible to expect such a holding state by a thin-walled shield member, and there are many due to rotational vibration or heat. The stress or the like is detached from the rotor, but this embodiment can also solve such a problem.

Further, the shield member 90 may be a tubular member that is continuously integrally molded by press working or extrusion processing, or a grid-like mesh member (mesh member) that includes a sheet member having a specific wall thickness. Cut and round the corners. The former has the advantage of the strength of the shield member 90, which has the advantage of forming or cost.

In Fig. 7, an example of rounding processing is shown (in addition, the grid of the member is omitted in the drawing). The ends of the mesh members of a specific length are superimposed and fixed. The fixing means may be a tape material or an adhesive. However, it is preferable to apply welding, caulking, bolts, or the like due to high pressure of resin sealing, thermal expansion during heating, and the like. This figure is an example in which the caulking is performed at both axial end portions and the center of the overlapping portion.

In Fig. 8, an example of a member suitable for the shield member 91 is shown. (a) An example of a plain woven gold mesh obtained by knitting a conductive wire. (b) An example of a punched metal plate formed by punching a conductive sheet. (c) An example of processing a conductive sheet into a mesh-shaped expanded metal sheet. By forming the shield member 90 using these materials, the shield member 90 including the communication hole 91 can be easily thinned, and the size of the rotary electric machine can be reduced. At the same time, the material cost and processing cost of the shield member 90 can be greatly reduced. Further, it is also expected to have an advantage of improving the degree of freedom in processing of a rotating electrical machine having different shapes by changing the cutting shape and the rounding diameter of the same mesh material.

Example 2

The shield member 90 of the first embodiment functions as an electrostatic shielding material by being set to a ground potential. Therefore, the exact connection between the ground plane and the shield member also contributes to the reliability.

In the second embodiment, the grounding example of the shield member 90 of the first embodiment is shown. The same portions as those in the first embodiment are denoted by the same reference numerals and will not be described.

Fig. 9 is an axial cross-sectional perspective view showing the arrangement relationship between the stator 10, the casing 50, and the shield member 90 before the resin is sealed. In the figure, the symbol 93 is a conduction member and has One of the shield members 90 is electrically connected to one of the housings 50 to ground the shield member 91. The conduction member 90 is disposed in a region where the coils of the adjacent core members 20 oppose each other. For example, when the winding 22 is not wound in the vicinity of the root portion of the collar portion 24 of the bobbin 23, the conduction member 93 is disposed in a space between the winding 22 and the collar portion 24.

The conduction member 93 is preferably a member having mechanical flexibility, and includes, for example, a metal wire member, a metal thin plate member, a wire-like member, a wire, or the like, but is not limited thereto. The conduction member 93 is disposed across the radial direction of the motor 100. For example, it is disposed in the vicinity of the collar portion 23 of the core member 10 and the winding 22. Further, it is preferable that the conduction member 93 is provided with an insulating member in addition to the portion where the shield member 90 is connected to the casing 50. A vinyl wire is applied in this embodiment.

In FIG. 10, the connection structure of the shield member 90 and the conduction member 93 is shown. FIG. 10(a) shows a form in which the shield member 90 is provided with the ground terminal 94. The shield member 90 (the communication hole/mesh and the like are not shown) is rounded and welded to the end portion at three points. At this time, the plate-shaped ground terminal 94 having the lower hole 94a is sandwiched from one of the welded portions (for example, one of the axial ends), and is integrally connected. In Fig. 10(b), an axial cross section of a connection example of the ground terminal 94 and the conduction member 93 is shown. A crimp terminal 95 having a lower hole is connected to the front end of the conduction member 93 at the axial center side. Furthermore, the conductive member 93 is electrically connected to the shield member 90 by the blind rivet 96 by using the ground terminal 94 and the lower hole of the crimp terminal 95. The conduction member 93, the ground terminal 94, and the blind rivet 96 are molded by the resin 30.

As such, the conductive member 93 remains insulated from the peripheral winding 22 and is electrically connected between the shield member 90 and the housing 50. Moreover, since the conduction member 90, the grounding terminal 94, the crimping terminal 95, and the shield member 90 each have mechanical flexibility, the load applied to the joint between the both ends due to the deformation of the sealing pressure with respect to the resin 30 can be alleviated. Thereby, the reliability of the shield member 90 with respect to the ground is improved.

Further, since the flexibility of the conduction member 93 or the like can absorb the dimensional deviation caused by the component size or the assembly accuracy, the assembly workability is improved. Blind rivets help the connection strength Guarantee and coexistence of workability. Here, by connecting the flange portion of the blind rivet 96 to the inner diameter side of the shield member 90, the amount of protrusion on the inner diameter side can be reduced. Thereby, it is possible to suppress the thickness of the shield member 90, and to achieve a small size, high output, high efficiency, and low cost of the motor.

Further, in the figure, although the other end of the vinyl wire 93 is connected to the casing 50, the grounding surface of the connection shield member 90 is also attached to the ground potential when the rotary electric machine is operated. Can be connected to any part. For example, although not shown, it may be connected to a shielding material for shielding the winding 22 from the rotor 40. Specifically, for example, a metal plate member for shielding or the like is provided in all or part of the collar portion 24, and a configuration in which the metal plate member or the like is used as a ground potential of the ground potential is secured. Further, the communication hole 91 of the shield member 90 may be directly used for connection to the conduction member 93. It has advantages in processing and parts cost.

Thus, according to the first and second embodiments, (1) the reduction of the true shaft voltage can be achieved by the shield member 90, (2) the insulation distance between the shield member 90 and the winding 22 can be surely ensured, and (3) The defect caused by the peeling of the resin 30. In addition, it is possible to achieve miniaturization, performance improvement, and reliability improvement.

The present invention is not limited to the various examples described above, and various changes and substitutions may be made without departing from the spirit and scope of the invention. In the embodiment, an example of a double-rotor type axial gap type permanent magnet synchronous motor has been described, but other types of axial gap type permanent magnet synchronous motors may be used. Further, it may be a synchronous reluctance motor, a switched reluctance motor, an induction motor, or the like that does not include the permanent magnet 41. Furthermore, it can be a generator instead of a motor.

10‧‧‧ Stator

20‧‧‧ core components

21‧‧‧ magnetic core

22‧‧‧Winding

23‧‧‧Winding tube

30‧‧‧Resin

40‧‧‧Rotor

41‧‧‧ permanent magnet

42‧‧‧ Back yoke

43‧‧‧ yoke

50‧‧‧shell

60‧‧‧End bracket

70‧‧‧ mechanical shaft

80‧‧‧ bearing

90‧‧‧Shielding members

91‧‧‧Connecting holes

100‧‧‧Motor

A‧‧‧Rotary axis

Claims (20)

An axial gap type rotating electric machine comprising: a stator, wherein a plurality of core members having stator cores wound in a circumferential direction are arranged in a ring shape around a rotating shaft, and are integrally molded by resin; a rotor that is opposite to a magnetic flux surface of the stator in a direction of a rotation axis; and a rotating shaft that is coaxially rotated with the rotor and penetrates a rotation axis of the stator; and the stator includes a a cylindrical shape of the outer circumference of the rotating shaft, and electrically shielding the shielding member of the winding and the radial opposing portion of the rotating shaft; the shielding member is disposed in a radial opposite portion of the winding and the rotating shaft The entire circumferential surface of the clamping has a plurality of communicating holes penetrating in the radial direction at a fixed density; and the ratio of the area ratio of the plurality of communicating holes occupying the entire peripheral surface to the portion other than the plurality of communicating holes is At least a part of the shield member is filled with the resin from the outer diameter side to the inner diameter side via the communication hole. The axial gap type rotary electric machine according to claim 1, wherein a length of the plurality of communication holes in the circumferential direction or the rotation axis direction is larger than a thickness of the shield member. The axial gap type rotating electrical machine of claim 1, wherein the shielding member comprises a metal mesh, a punched metal plate or an expanded metal plate. An axial gap type rotary electric machine according to claim 1, wherein said shield member is formed in an outer peripheral shape of said rotating shaft, and ends of said sheet members of a specific length are joined to each other. An axial gap type rotary electric machine according to claim 1, wherein said shield member is formed along said outer peripheral shape, the end of the sheet member of a specific length The parts are joined to each other in the radial direction. The axial gap rotary electric machine according to claim 1, further comprising: a conduction member that connects the shield member and the inner circumference of the casing; and the conduction member is disposed between the adjacent core members, and is disposed opposite to the winding Regional. The axial gap type rotating electric machine according to claim 1, wherein the shield member further includes a grounding terminal; and the connecting member that connects the grounding terminal and the inner circumference of the casing is adjacent to the core member, and is disposed opposite to the winding. region. An axial gap type rotating electric machine comprising: a stator, wherein a plurality of core members having stator cores wound in a circumferential direction are arranged in a ring shape around a rotating shaft, and are integrally molded by resin; a rotor that is opposite to a magnetic flux surface of the stator in a direction of a rotation axis; and a rotating shaft that is coaxially rotated with the rotor and penetrates a rotation axis of the stator; and the stator includes a The mechanical shaft has a cylindrical shape extending in a peripheral shape, and electrically shields the shielding member between the winding and the radial opposite portion of the rotating shaft; the shielding member includes a mesh member, and at least a part of the shielding member The resin is filled from the outer diameter side to the inner diameter side through the mesh of the mesh member. The axial gap type rotating electrical machine of claim 8, wherein the mesh member has a mesh area larger than an area of the grille. The axial gap type rotating electrical machine of claim 8, wherein the mesh member has a mesh density constant. The axial gap type rotary electric machine according to claim 8, wherein the shield member comprises a metal mesh, a punched metal plate or an expanded metal plate. The axial gap type rotary electric machine according to claim 8, wherein the shield member is formed in an outer peripheral shape of the rotary shaft, and ends of the sheet member of a specific length are coupled to each other. The axial gap type rotary electric machine according to claim 8, wherein the shield member is joined along the outer peripheral shape, and the end portions of the sheet-like members of a specific length are overlapped with each other in the radial direction. The axial gap rotary electric machine according to claim 8, further comprising: a conduction member that connects the shield member and the inner circumference of the casing; and the conduction member is disposed between adjacent core members, and is disposed opposite to the winding Regional. The axial gap rotary electric machine according to claim 8, wherein the shield member further includes a grounding terminal; and the connecting member that connects the grounding terminal and the inner circumference of the casing is adjacent to the core member, and is disposed opposite to the winding. region. A stator for a rotating electrical machine, wherein a plurality of core members having a stator core that winds a winding in a circumferential direction and generates a magnetic flux in a direction of a rotating shaft are arranged in a ring shape around a rotating shaft, and are molded by resin. The stator includes: a through hole for inserting a rotating shaft; and a shield member formed into a cylindrical shape along an outer peripheral shape of the rotating shaft to electrically shield the winding and the rotating shaft a radial facing portion; and the shielding member is a plurality of communicating holes having a fixed density and a plurality of communicating holes extending in a radial direction by the entire circumferential surface of the winding and the radial opposing portion of the rotating shaft; and the plurality of a ratio of an area of the continuous hole to the area of the whole circumference is larger than an area ratio of a portion other than the plurality of communication holes, and at least one part of the shielding member The resin is filled from the outer diameter side to the inner diameter side through the communication hole. The stator for a rotating electrical machine according to claim 16, wherein the length of the plurality of communicating holes in the circumferential direction or the direction of the rotating shaft is larger than the thickness of the shielding member. The stator for a rotating electrical machine according to claim 16, wherein the shield member comprises a metal mesh, a punched metal plate or an expanded metal plate. The stator for a rotating electrical machine according to claim 16, wherein the shield member is formed in an outer peripheral shape of the rotating shaft, and ends of the sheet-like members of a specific length are coupled to each other. A stator for a rotating electrical machine according to claim 19, wherein one end portion is connected to the shield member, and the other end portion is disposed on the outer circumference of the stator in a region between the adjacent core members from the opposite windings.