WO2013175541A1

WO2013175541A1 - Permanent magnet embedded rotor of motor

Info

Publication number: WO2013175541A1
Application number: PCT/JP2012/003422
Authority: WO
Inventors: 昂史井手下
Original assignee: 三菱電機株式会社
Priority date: 2012-05-25
Filing date: 2012-05-25
Publication date: 2013-11-28
Also published as: CN104247215B; JPWO2013175541A1; CN104247215A; JP5748911B2

Abstract

The purpose of the present invention is to provide a rotor of a motor having a structure that allows permanent magnets to be stably fixed by eliminating a problem of conventional rotors of motors, namely, the problem of an increase in imbalance of a permanent magnet embedded rotor of a motor due to instabilities of adhering capacity and adhesion area caused by stripping of an adhesive, which has been applied to the permanent magnets, at the edges of permanent magnet embedding holes. Each permanent magnet (4) is provided with an adhesive injection hole (7), which penetrates through the center section of a rotor core (1) in the axial direction of a rotary shaft (2), and adhesive ejection holes (8a, 8b), which are vertically connected to the adhesive injection hole (7) and formed on a surface having a long side in the axial direction of the rotary shaft (2) and a short side in the circumferential direction of the rotor core (1). An adhesive (10) for fixing the rotor core (1) to the permanent magnet (4) is ejected through the adhesive ejection holes (8a, 8b).

Description

Motor permanent magnet embedded rotor

The present invention relates to a rotor used in a permanent magnet motor, and more particularly to a permanent magnet embedded rotor of a motor provided with a plurality of permanent magnets inside a rotor core.

In a permanent magnet embedded rotor used in a conventional permanent magnet motor, a rotating shaft is fitted in the central portion of the rotor core, and a plurality of permanent magnet embedded holes are formed in the vicinity of the outer periphery along the circumferential direction of the rotor core. A configuration is adopted in which a permanent magnet formed in a size that can be stored in the permanent magnet embedded hole is embedded in the permanent magnet embedded hole. In addition, when embedding the permanent magnet in the permanent magnet embedding hole, an adhesive is applied to both surfaces of the permanent magnet along the rotation axis direction facing the permanent magnet embedding hole, and the permanent magnet is embedded in the permanent magnet embedding hole by this adhesive. Is fixed (for example, refer to Patent Document 1).

JP 2000-197292 A (page 5, FIG. 3)

Since the conventional permanent magnet embedded rotor is configured as described above, for example, when the permanent magnet is embedded in the permanent magnet embedded hole, an adhesive applied to the permanent magnet at the edge of the permanent magnet embedded hole is used. As a result, the adhesive capacity and the adhesive area are not fixed, and the unbalance amount of the rotor increases. In addition, because the adhesive capacity and the adhesive area cannot be secured stably, and the adhesive strength is not secured, the permanent magnet is peeled off on both surfaces coated with adhesive by the torque and centrifugal force when the rotor is started and stopped. There have been problems such as damage to the rotor core and, consequently, the rotor due to repeated contact with the thin portions of the rotor core on both sides in the circumferential direction inside the embedded hole.

Also, if the bonding capacity and bonding area on the inner surface side of the rotor core radial direction of the permanent magnet are small, the bonding strength on the inner surface side becomes weak, and the torque and centrifugal force at the time of starting and stopping the rotor act to rotate the permanent magnet. The bonded part on the inner surface side of the core of the core is peeled off and fixed only on the outer surface of the core of the rotor core in the radial direction. As a result, both the inner and outer surfaces of the permanent magnet in the core direction of the rotor core, or only one side of the inner surface There is a problem that the stress applied to the outer surface tip of the rotor core thin portion inside the permanent magnet embedding hole becomes larger than that in the case where the rotor core is bonded, and the rotor core is fatigued.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a permanent magnet motor having a structure in which the amount of rotor unbalance is suppressed and the permanent magnet is stably fixed. It is to obtain a magnet embedded rotor.

In the rotor with embedded permanent magnet of the motor according to the present invention, the rotation shaft is fitted in the center of the rotor core, provided at equal intervals in the rotor core circumferential direction by the number of poles of the rotor, and penetrated in the rotation axis direction. In a permanent magnet embedded rotor of a motor having a permanent magnet embedded hole and a permanent magnet mounted in each permanent magnet embedded hole so as to be housed in the permanent magnet embedded hole, the permanent magnet includes a rotating shaft. An adhesive injection hole penetrating in the direction and an adhesive injection hole connected to the adhesive injection hole on the surface having the rotation axis direction as the long side and the rotor core circumferential direction as the short side are provided, and from the adhesive injection hole to the rotor The adhesive that fixes the iron core and the permanent magnet is ejected.

By providing an adhesive injection hole and an adhesive ejection hole in the permanent magnet according to the present invention, the permanent magnet is arranged at a desired position of the permanent magnet embedding hole, and then the adhesive capacity and the adhesive area determined at the predetermined position are set. Adhesive can be applied at the edge of the permanent magnet, so that the desired adhesive strength can be obtained without peeling off the adhesive at the edge of the permanent magnet embedding hole, the unbalance amount of the rotor is suppressed, and the permanent magnet is rotated by the rotor. The rotor can be prevented from being broken without being peeled off from the core.

It is a front view which shows the structure of the permanent magnet embedding type | mold rotor of the motor which shows Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an axial cross-sectional view showing a configuration of a permanent magnet embedded rotor of a motor showing Embodiment 1 of the present invention. It is a three-plane figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 1 of this invention. It is an electromagnetic analysis result of the magnetic flux line of the permanent magnet embedding type | mold rotor of the motor which shows Example 1 of this invention. It is an axial cross section which shows the structure of the permanent magnet embedded rotor of the motor which shows Example 2 of this invention. It is a three-plane figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 2 of this invention. It is a front view which shows the structure of the permanent magnet embedded rotor of the motor which shows Example 3 of this invention. It is an axial cross section which shows the structure of the permanent magnet embedded rotor of the motor which shows Example 3 of this invention. It is a three-view figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 3 of this invention. It is an axial cross section which shows the structure of the permanent magnet embedding type | mold rotor of the motor which shows Example 4 of this invention. It is a front view of the steel plate without the permanent magnet embedding hole located in the edge part of the rotor core of the permanent magnet embedding type | mold rotor of the motor which shows Example 4 of this invention. It is a front view which shows the structure of the permanent magnet embedded rotor of the motor which shows Example 5 of this invention. It is a three-plane figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 5 of this invention. It is a front view which shows the structure of the permanent magnet embedded rotor of the motor which shows Example 6 of this invention. It is a three-plane figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 6 of this invention. It is a front view which shows the structure of the permanent magnet embedded rotor of the motor which shows Example 7 of this invention. It is a three-plane figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 7 of this invention.

Example 1.
FIG. 1 is a front view showing the configuration of an embedded permanent magnet rotor of a motor showing Embodiment 1 of the present invention, and FIG. 2 shows the configuration of the embedded permanent magnet rotor of the motor showing Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view in the axial direction, and is a cross-sectional view taken along line XX ′ in FIG. FIG. 3 is a three-sided view of the permanent magnet of the embedded permanent magnet rotor of the motor showing Embodiment 1 of the present invention, and FIG. 4 is a magnetic flux line of the embedded permanent magnet rotor of the motor showing Embodiment 1 of the present invention. It is an electromagnetic analysis result.

1 and 2, reference numeral 1 denotes a rotor core in which a plurality of silicon steel plates having the same shape are stacked and punched into a predetermined shape, for example, a shape having ten permanent magnet embedding holes as shown in FIG. 1. Reference numeral 2 denotes a rotating shaft fitted in the central portion of the

rotor core

1, and 3 denotes a rotor core that is provided on the rotor core 1 at equal intervals corresponding to the number of poles. For example, as shown in FIG. A permanent magnet embedding hole having a rectangular shape penetrating in the axial direction of the rotary shaft 2 with the circumferential direction of 1 as the long side and the radial direction as the short side, 4 is embedded in the permanent magnet embedding hole 3 for the number of poles, for example, As shown in FIG. 1, there are ten permanent magnets, and the permanent magnet 4 is composed of a neodymium rare earth magnet. 5a is an inner surface side groove, 5b is an outer surface side groove, and the inner surface side groove 5a and the outer surface side groove 5b are provided in the permanent magnet embedded hole 3 along the axial direction of the rotating shaft 2. 6 is an adhesive injection port provided along the axial direction of the rotary shaft 2 at the center of a rectangular double-sided center having a long side in the circumferential direction of the rotor core 1 of the permanent magnet 4 and a short side in the radial direction; An adhesive injection hole penetrating the permanent magnet 4 with the adhesive injection port 6 as an entrance / exit, 8a is an inner surface side adhesive injection hole, 8b is an outer surface side adhesive injection hole, and the inner surface side adhesive injection hole 8a and the outer surface side The adhesive ejection hole 8b has an opening on the inner and outer surface along the radial direction of the rotor core 1 with the axial direction of the rotating shaft 2 of the permanent magnet 4 as the long side and the circumferential direction of the rotor core 1 as the short side. And bonded to the adhesive injection hole 7 in the vertical direction. 9 is an iron powder mixed in the adhesive, and 10 is an adhesive for fixing the permanent magnet 4 to the permanent magnet embedding hole 3.

As shown in FIG. 3, the permanent magnet 4 has a rectangular cross-sectional shape in the axial direction of the rotating shaft 2 and is formed in a size that can be accommodated in the permanent magnet embedded hole 3. An adhesive injection hole 7 that penetrates along the axial direction of the rotary shaft 2 with the inlet 6 as an entrance and exit, and an inner surface side adhesive that is coupled to the adhesive injection hole 7 in the vertical direction and penetrates along the radial direction of the rotor core 1 Each has an agent ejection hole 8a and an outer surface side adhesive ejection hole 8b. These adhesive injection hole 7, inner surface side adhesive ejection hole 8a, and outer surface side adhesive ejection hole 8b are all determined from the electromagnetic analysis results of FIG. Since the adhesive injection hole 7, the inner surface side adhesive ejection hole 8 a, and the outer surface side adhesive ejection hole 8 b are provided in the central portion in the circumferential direction of the permanent magnet 4, the magnetic characteristics of the rotor can be prevented from being deteriorated.

In the rotor core 1, the adhesive core of the adhesive 10 ejected from the inner surface side adhesive ejection hole 8 a and the outer surface side adhesive ejection hole 8 b is used as the center of the inner surface in the radial direction of the rotor core 1 of the permanent magnet embedded hole 3. That is, the inner surface side groove 5a and the outer surface side groove 5b, which are thin flat grooves, are provided at positions facing the inner surface side adhesive jet hole 8a and the outer surface side adhesive jet hole 8b along the axial direction of the rotary shaft 2, respectively. . When the adhesive 10 is injected from the adhesive injection port 6 after the permanent magnet 4 is fitted into the permanent magnet embedded hole 3, the adhesive 10 passes through the adhesive injection hole 7 and is bonded to the adhesive injection hole 7 in the vertical direction. The adhesive 10 ejected from the inner surface side adhesive jetting hole 8a and the outer surface side adhesive jetting hole 8b is accumulated in the inner surface side groove 5a and the outer surface side groove 5b.

Thus, by providing the permanent magnet 4 with the adhesive injection hole 7, the inner surface side adhesive ejection hole 8 a, and the outer surface side adhesive ejection hole 8 b, the permanent magnet 4 is placed at a desired position in the permanent magnet embedded hole 3. After placement, the adhesive 10 can be applied to a predetermined position with a predetermined adhesive capacity and adhesive area, so that the adhesive 10 is not peeled off at the edge of the permanent magnet embedding hole 3 and is highly reliable. Adhesion becomes possible. Further, at the center of the inner surface of the rotor core 1 in the radial direction of the rotor core 1 in the permanent magnet embedded hole 3, that is, at a position facing the inner surface side adhesive jet hole 8 a and the outer surface side adhesive jet hole 8 b along the axial direction of the rotary shaft 2. By providing the inner surface side groove 5a and the outer surface side groove 5b, which are thin flat grooves, the inner surface side groove 5a and the outer surface side groove 5b serve as an adhesive reservoir for the adhesive 10, and the inner surface side adhesive ejection hole 8a and the outer surface side adhesive ejection hole. With the adhesive 10 ejected from 8b, the permanent magnet 4 can be fixed to the permanent magnet embedding hole 3 with high accuracy with a predetermined adhesive capacity and adhesive area. As a result, a desired adhesive strength is obtained between the permanent magnet 4 and the permanent magnet embedding hole 3, so that the amount of unbalance of the rotor is suppressed, and the permanent magnet 4 is prevented from rotating due to torque and centrifugal force when the rotor is started and stopped. It is possible to prevent the rotor from being damaged by peeling off the both surfaces where the adhesive 10 is applied.

Further, when the adhesive 10 injected from the adhesive injection port 6 passes through the adhesive injection hole 7 and is ejected from the inner surface side adhesive ejection hole 8a and the outer surface side adhesive ejection hole 8b, the inner surface side adhesive ejection hole 8a If the diameter is designed to be larger than the diameter of the outer surface side adhesive ejection hole 8b, the inner surface side adhesive 10 is bonded in a larger amount than the outer surface side due to the area difference of the adhesive ejection hole. As a result, the adhesive strength of the surface facing the inner surface side adhesive ejection hole 8a of the permanent magnet 4 is increased, and only the surface facing the outer surface side adhesive ejection hole 8b of the permanent magnet 4 is bonded to the rotor core 1. Therefore, even if the torque and centrifugal force at the time of starting and stopping of the rotor act, the stress applied to the outer surface side tip of the rotor core 1 thin portion inside the permanent magnet embedded hole 3 does not increase, and the rotor core 1 fatigue failure can be prevented.

Furthermore, only the adhesive 10 is used by filling the space of the adhesive injection hole 7, the inner surface side adhesive ejection hole 8 a, and the outer surface side adhesive ejection hole 8 b using a mixed material of iron powder 9 and the adhesive 10. Thus, the magnetic properties of the rotor are improved by the influence of the iron powder 9 rather than filling the space, and the performance of the motor can be improved.

Example 2
In Example 1, the inner surface side adhesive ejection holes 8a and the outer surface side adhesive ejection holes 8b are arranged so as to be coaxial along the radial direction of the rotor core 1 of the permanent magnet 4, and the same number of adhesive ejection holes. However, the number of the adhesive ejection holes along the radial direction of the rotor core 1 may be different so as to be different between the inner surface side and the outer surface side.

FIG. 5 is an axial cross-sectional view showing a configuration of a permanent magnet embedded rotor of a motor according to Embodiment 2 of the present invention, a cross-sectional view taken along line XX ′ in FIG. 1, and FIG. It is a three-plane figure of the permanent magnet of the permanent magnet embedded type rotor of the motor which shows Example 2 of invention. In the second embodiment, as shown in FIG. 6, the number of adhesive ejection holes is changed between the inner surface side and the outer surface side so that the number of outer surface side adhesive ejection holes 81b is smaller than the inner surface side adhesive ejection holes 81a. Designed to. As a result, since the number of the adhesive ejection holes is different between the inner and outer surfaces, the adhesive amount of the adhesive 10 on the surface facing the inner surface side adhesive ejecting hole 8a of the permanent magnet 4 is the surface facing the outer surface side adhesive ejecting hole 8b. More than.

In addition, the number of adhesive ejection holes is changed between the inner surface side and the outer surface side so that the number of outer surface side adhesive ejection holes 81b is smaller than the inner surface side adhesive ejection holes 81a, and the inner surface side adhesion is also performed. If the diameter of the agent ejection hole 81a is designed to be larger than the diameter of the outer surface side adhesive ejection hole 81b, the inner surface side adhesive 10 is larger than the outer surface side due to the area difference of the adhesive ejection hole. Glued.

Example 3
In the first embodiment, the inner surface side adhesion is performed at the center of the inner surface of the rotor core 1 in the radial direction of the permanent magnet embedded hole 3 provided in the rotor core 1 as a groove for storing the adhesive 10, that is, along the axial direction of the rotating shaft 2. The case where the inner surface side groove 5a and the outer surface side groove 5b, which are thin flat grooves, are respectively provided at positions facing the agent ejection hole 8a and the outer surface side adhesive ejection hole 8b has been described. The same effect can be obtained by providing a flat groove for accumulation on the surface of the permanent magnet 4 side.

FIG. 7 is a front view showing a configuration of a permanent magnet embedded rotor of a motor according to Embodiment 3 of the present invention, and FIG. 8 shows a configuration of a permanent magnet embedded rotor of the motor according to Embodiment 3 of the present invention. FIG. 8 is a cross-sectional view in the axial direction and shows a cross-sectional view along line YY ′ in FIG. 7. FIG. 9 is a three-sided view of the permanent magnet of the embedded permanent magnet rotor of the motor showing Embodiment 3 of the present invention. In the third embodiment, as shown in FIG. 9, along the axial direction of the rotating shaft 2 of the permanent magnet 4 and overlaps with the adhesive injection hole 7, in the center of the inner and outer surfaces of the permanent magnet 4, that is, the shaft of the rotating shaft 2. A thin flat inner surface side groove 11a and an outer surface side groove 11b are provided so as to overlap the inner surface side adhesive jet hole 8a and the outer surface side adhesive jet hole 8b along the direction. The inner surface side groove 11 a and the outer surface side groove 11 b are bonded to the inner surface side groove 11 b in the direction perpendicular to the adhesive injection hole 7, and penetrated along the radial direction of the rotor core 1. Each agent ejection hole 8b is provided. As a result, the inner surface side adhesive jetting hole 8a and the outer surface side adhesive jetting are performed at the center in the radial direction inner and outer surfaces of the rotor core 1 of the permanent magnet embedded hole 3 described in the first embodiment, that is, along the axial direction of the rotating shaft 2. As in the case where the inner surface side groove 5a and the outer surface side groove 5b, which are thin flat grooves, are provided at positions opposed to the hole 8b, the adhesive 10 is stored in both the inner surface side groove 11a and the outer surface side groove 11b so as to be permanent. The magnet 4 can be positioned and fixed in the permanent magnet embedded hole 3.

Example 4
In the first embodiment, the adhesive injection hole 7 penetrates along the axial direction of the rotary shaft 2 with the adhesive injection port 6 provided at the center of both surfaces of the permanent magnet 4 along the axial direction of the rotary shaft 2. However, the present invention is not limited to this, and one end of the penetrating adhesive injection hole 7 may be designed to be sealed.

FIG. 10 is a cross-sectional view in the axial direction showing the configuration of the permanent magnet embedded rotor of the motor according to the fourth embodiment of the present invention. FIG. 10 is a cross-sectional view taken along line XX ′ in FIG. It is a front view of the steel plate without the permanent magnet embedding hole located in the edge part of the rotor core of the permanent magnet embedding type | mold rotor of the motor which shows Example 4 of invention. In the fourth embodiment, as shown in FIG. 10, in addition to the configuration of the first embodiment, the silicon steel plate 12 without the permanent magnet embedding hole 3 is provided at one end of the rotor core 1 so that the adhesive inlet 6 is formed. Only one direction can be determined. As a result, it is possible to prevent the adhesive 10 that is ejected from the hole on the opposite side of the adhesive injection port 6 when the adhesive 10 is injected, and all the adhesive 10 injected from the adhesive injection port 6 is connected to the inner surface side adhesive ejection hole 8a. Since the ejection is performed from the outer surface side adhesive ejection hole 8b, the permanent magnet 4 can be positioned and fixed in the permanent magnet embedded hole 3.

Example 5 FIG.
In the first embodiment, the case has been described in which the permanent magnet 4 has a structure in which the circumferential direction of the rotor core is the long side and the radial direction is the short side, but the permanent magnet 4 has the short side of the circumferential direction of the rotor core and the radial direction. A structure with a long side may be used. FIG. 12 is a front view showing a configuration of a permanent magnet embedded rotor of a motor according to a fifth embodiment of the present invention. FIG. 13 shows a permanent magnet embedded rotor of the motor according to the fifth embodiment of the present invention. It is a three-view figure of a permanent magnet.

12 and 13, 15 is a rotor core, 25 is a rotary shaft fitted in the center of the rotor core 15, and 35 is provided in the rotor core 15 at equal intervals corresponding to the number of poles, for example, as shown in FIG. 12. The ten permanent magnet embedded holes 35 are formed in a rectangular shape that penetrates in the axial direction of the rotary shaft 25 with the circumferential direction of the rotor core 15 as the short side and the radial direction as the long side. For example, ten permanent magnets as shown in FIG. 55 a is an inner surface side groove, 55 b is an outer surface side groove, and the inner surface side groove 55 a and the outer surface side groove 55 b are provided in the permanent magnet embedded hole 35 along the axial direction of the rotating shaft 25. 65 is an adhesive inlet provided along the axial direction of the rotary shaft 25 at the center of a rectangular double-sided center having a short side in the circumferential direction of the rotor core 15 of the permanent magnet 45 and a long side in the radial direction; An adhesive injection hole penetrating the permanent magnet 45 with the adhesive injection port 65 as an entrance / exit, 85a is an inner surface side adhesive ejection hole, 85b is an outer surface side adhesive ejection hole, and the inner surface side adhesive ejection hole 85a and the outer surface side The adhesive ejection hole 85b has an opening on the inner and outer surfaces along the radial direction of the rotor core 15 with the axial direction of the rotating shaft 25 of the permanent magnet 45 as the long side and the circumferential direction of the rotor core 15 as the short side. And bonded to the adhesive injection hole 75 in the vertical direction.

Example 6
In the first embodiment, the case where the axial cross section of the permanent magnet 4 has a quadrangular shape has been described. However, the axial cross section may be arcuate. FIG. 14 is a front view showing a configuration of a permanent magnet embedded rotor of a motor according to Embodiment 6 of the present invention, and FIG. 15 shows a permanent magnet of a permanent magnet embedded rotor of a motor according to Embodiment 6 of the present invention. FIG.

14 and 15, 16 is a rotor core, 26 is a rotating shaft fitted in the center of the rotor core 16, and 36 is provided in the rotor core 16 at equal intervals corresponding to the number of poles. For example, as shown in FIG. The ten permanent magnet embedded holes 36 are formed in such a manner that the circumferential direction of the rotor core 16 is the long side and the radial direction is the short side and penetrates in the axial direction of the rotary shaft 26. For example, ten permanent magnets are embedded, as shown in FIG. 56 a is an inner surface side groove, 56 b is an outer surface side groove, and the inner surface side groove 56 a and the outer surface side groove 56 b are provided in the permanent magnet embedded hole 36 along the axial direction of the rotating shaft 26. 66 is an adhesive inlet provided along the axial direction of the rotary shaft 26 at the center of an arcuate double-sided surface having a long side in the circumferential direction of the rotor core 16 of the permanent magnet 46 and a short side in the radial direction; An adhesive injection hole that penetrates the permanent magnet 46 with the agent injection port 66 as an entrance, 86a is an inner surface side adhesive ejection hole, 86b is an outer surface side adhesive ejection hole, and an inner surface side adhesive ejection hole 86a and an outer surface side adhesion The agent ejection hole 86b has an opening on the inner and outer surface along the radial direction of the rotor core 16 with the axial direction of the rotating shaft 26 of the permanent magnet 46 as the long side and the circumferential direction of the rotor core 16 as the short side. The adhesive injection holes 76 are connected to each other in the vertical direction.

Example 7
In the first embodiment, the case where the axial cross section of the permanent magnet 4 is a quadrangular shape has been described. However, one long side of the rotor core circumferential direction of the axial cross section is an arc, the other is a straight line, and the radial direction is A structure with a short side may be used. FIG. 16 is a front view showing the configuration of a permanent magnet embedded rotor of a motor according to Embodiment 7 of the present invention, and FIG. 17 shows the permanent magnet of the embedded permanent magnet rotor of the motor according to Embodiment 7 of the present invention. FIG.

16 and 17, 17 is a rotor core, 27 is a rotating shaft fitted into the center of the

rotor core

17, and 37 is provided in the rotor core 17 at equal intervals corresponding to the number of poles, for example, as shown in FIG. 16. 10 permanent magnet embedded holes having a shape penetrating in the axial direction of the rotating shaft 27 with one piece of the long side in the circumferential direction of the rotor core 17 being an arc, the other piece being a straight line, and the radial direction being a short side , 47 are the number of poles embedded in the permanent magnet embedded hole 37, for example, 10 permanent magnets as shown in FIG. 57 a is an inner surface side groove, 57 b is an outer surface side groove, and the inner surface side groove 57 a and the outer surface side groove 57 b are provided in the permanent magnet embedded hole 37 along the axial direction of the rotating shaft 27. 67 is provided along the axial direction of the rotary shaft 27 at the center of both surfaces in a shape in which one piece of the circumferential long side of the rotor core 17 of the permanent magnet 47 is an arc, the other piece is a straight line, and the radial direction is a short side. The adhesive injection port 77 is an adhesive injection hole penetrating the permanent magnet 47 with the adhesive injection port 67 as an entrance, 87a is an inner surface side adhesive jet hole, 87b is an outer surface side adhesive jet port, and the inner surface side The adhesive ejection hole 87a and the outer surface side adhesive ejection hole 87b are along the radial direction of the rotor core 17 with the axial direction of the rotating shaft 27 of the permanent magnet 47 as the long side and the circumferential direction of the rotor core 17 as the short side. The inner and outer surfaces have openings and are connected to the adhesive injection holes 77 in the vertical direction.

1 rotor core, 2 rotary shaft, 3 permanent magnet embedding hole, 4 permanent magnet, 5a, 11a inner surface side groove, 5b, 11b outer surface side groove, 6 adhesive injection port, 7 adhesive injection hole, 8a, 81a inner surface side adhesive Ejection holes, 8b, 81b, outer surface side adhesive ejection holes, 9 iron powder, 10 adhesives, 12 steel plates.

Claims

A rotating shaft is fitted in the center of the rotor core, provided in the circumferential direction of the rotor core at equal intervals by the number of poles of the rotor, and has permanent magnet embedded holes penetrating in the direction of the rotating shaft. In a permanent magnet embedded rotor of a motor in which a permanent magnet formed so as to be housed in the permanent magnet embedded hole is mounted in each of the holes,
The permanent magnet has an adhesive injection hole penetrating in the rotation axis direction, and an adhesive bonded to the adhesive injection hole on a surface having the rotation axis direction as a long side and the rotor core circumferential direction as a short side. A jet hole,
An embedded permanent magnet rotor for a motor, wherein an adhesive for fixing the rotor core and the permanent magnet is ejected from the adhesive ejection hole.
2. The permanent magnet embedded rotor according to claim 1, wherein the adhesive injection hole and the adhesive ejection hole are provided at positions where magnetic flux lines of the permanent magnet do not pass.
3. The permanent magnet embedded rotor according to claim 1, wherein the adhesive injection hole and the adhesive ejection hole are provided in a central portion of the permanent magnet. 4.
4. The permanent magnet embedded rotor according to claim 1, wherein one end of the adhesive injection hole is sealed. 5.
5. The permanent magnet embedded rotor according to claim 1, wherein the adhesive ejection hole is vertically coupled to the adhesive injection hole. 6.
6. The permanent magnet for a motor according to claim 1, wherein the adhesive ejection holes are provided on both surfaces of the permanent magnet embedded hole facing the inner and outer surfaces in the rotor core radial direction. Embedded rotor.
The diameter of the adhesive jetting hole facing the rotor core radial inner surface of the permanent magnet embedded hole is larger than the diameter of the adhesive jetting hole facing the rotor core radial outer surface of the permanent magnet embedded hole. The embedded permanent magnet rotor of the motor according to claim 6, wherein the rotor is large.
8. A groove is provided on the inner surface of the permanent magnet embedded hole in the rotor core radial direction in a position facing the adhesive ejection hole along the rotation axis direction. A rotor embedded with a permanent magnet of a motor according to any one of the above.
8. A groove is provided on the inner and outer surfaces of the permanent magnet in the radial direction of the rotor core, and the groove overlaps with the adhesive ejection hole along the rotation axis direction. A rotor embedded with a permanent magnet of a motor according to any one of the above.
10. The permanent magnet embedded rotor of a motor according to claim 1, wherein iron powder is mixed in the adhesive. 11.