Rotating electric machines

Abstract

A rotating electric machine comprises: a rotor shaft (12) supported by bearings (9, 11); a rotor (14) mounted on the rotor shaft (12) and rotating together with the rotor shaft (12); a stator (3) surrounding the rotor (14) with a gap (314g) therebetween to enable the rotation of the rotor (14); a frame (2) surrounding the rotor (14) and the stator (3) and having the outer periphery of the stator (3) mounted on its inner periphery; and an annular member provided along the inner periphery of the frame (2) to prevent foreign matter present at the boundary between the frame (2) and the stator (3) from moving to an area different from the boundary. The member prevents foreign matter such as frame debris generated during the manufacturing process of the rotating electric machine from being scattered into the rotating electric machine.

Description

Technical Field

[0001] The present application relates to a rotating electrical machine. Background Art

[0002] Conventionally, there is known a structure in which a stator is press-fitted and fixed to the inner peripheral surface of a frame in a rotating electrical machine mounted on a vehicle, and a rotor is provided inside the stator (for example, Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-136829 Summary of the Invention

[0004] Technical problem to be solved by the invention

[0005] To improve fuel efficiency, rotating electrical machines installed in vehicles are required to be lightweight. Furthermore, they are often installed and used within the engine compartment, requiring durability against temperature fluctuations, vibration, and other factors. Furthermore, the limited space available within the engine compartment further demands a reduction in the radial dimensions of rotating electrical machines.

[0006] The stator of a rotating electrical machine is fixed to the inner circumference of a frame. However, to secure it with a specified holding force, the stator's outer diameter must be larger than the frame's inner diameter, and the stator must be secured to the frame. While lightweight construction using aluminum or other materials can be achieved at low cost, the stator is formed by stacking electromagnetic steel sheets, resulting in a step between the stator and the frame. Pressing the stator into the frame during mounting can cause the low-hardness aluminum frame to be scraped, scattering debris inside the rotating electrical machine or damaging the frame. While shrink-fitting can be used to secure the stator to the frame without directly pressing it, this method increases manufacturing costs due to equipment costs and other factors.

[0007] The present application discloses a technology developed in view of the above-mentioned actual situation, and aims to prevent foreign matter such as frame scraps generated during the manufacturing process of a rotating electrical machine from being scattered into the interior of the rotating electrical machine.

[0008] Technical solutions used to solve technical problems

[0009] The rotating electric machine disclosed in the present application includes: a rotor shaft supported by a bearing; a rotor mounted on the rotor shaft and rotating together with the rotor shaft; a stator surrounding the rotor with a gap therebetween to enable the rotation of the rotor; a frame surrounding the rotor and the stator and having the outer periphery of the stator mounted on the inner periphery; and an annular member arranged along the inner periphery of the frame to prevent foreign matter present at the boundary portion between the frame and the stator from moving to an area different from the boundary portion.

[0010] Effects of the Invention

[0011] The rotating electric machine disclosed in the present application includes: a rotor shaft supported by a bearing; a rotor mounted on the rotor shaft and rotating together with the rotor shaft; a stator surrounding the rotor with a gap therebetween to enable the rotation of the rotor; a frame surrounding the rotor and the stator and having the outer periphery of the stator mounted on the inner periphery; and an annular member arranged along the inner periphery of the frame to prevent foreign matter present at the boundary portion between the frame and the stator from moving to an area different from the boundary portion. Therefore, foreign matter generated during the manufacturing process of the rotating electric machine, such as frame debris, can be prevented from being scattered into the interior of the rotating electric machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional view of the rotating electrical machine according to the first embodiment of the present application, in which the cross section of the annular member is hatched.

[0013] Figure 2 yes Figure 1 Magnified view of part A.

[0014] Figure 3 yes Figure 1 and Figure 2 A perspective view of an exemplified annular member.

[0015] Figure 4 is Figures 1 to 3 In the illustrated explanatory diagram of the assembly process when the stator is mounted on the frame in the rotating electrical machine, a cross section is indicated by hatching.

[0016] Figure 5 This is a perspective view showing another example of the annular member of the rotating electrical machine according to the first embodiment of the present application.

[0017] Figure 6 This is a cross-sectional view of a rotating electrical machine according to a second embodiment of the present application, in which the cross section of the annular member is hatched.

[0018] Figure 7 yes Figure 6 Magnified view of part A.

[0019] Figure 8 is Figures 5 to 7 In the illustrated explanatory diagram of the assembly process when the stator is mounted on the frame in the rotating electrical machine, a cross section is indicated by hatching.

[0020] Figure 9 This is a cross-sectional view of a rotating electrical machine according to a third embodiment of the present application, in which the cross section of the annular member is hatched.

[0021] Figure 10 yes Figure 9 Magnified view of part A.

[0022] Figure 11 is Figure 9 and Figure 10 In the illustrated explanatory diagram of the assembly process when the stator is mounted on the frame in the rotating electrical machine, a cross section is indicated by hatching.

[0023] Figure 12 yes Figure 9 and Figure 10 A perspective view of an exemplified annular member.

[0024] Figure 13 It is a cross-sectional view of a rotating electrical machine according to a fourth embodiment of the present application, in which the cross sections of the annular member and the thin-walled cylindrical member are hatched.

[0025] Figure 14 yes Figure 13 Magnified view of part A.

[0026] Figure 15 is Figure 13 and Figure 14 In the illustrated explanatory diagram of the assembly process when the stator is mounted on the frame in the rotating electrical machine, a cross section is indicated by hatching. DETAILED DESCRIPTION

[0027] Implementation Method 1

[0028] The following describes embodiments of the rotating electrical machine of the present application based on the accompanying drawings. The rotating electrical machine of the present application is not limited to the following and can be modified appropriately without departing from the spirit of the present application. In the drawings shown below, the scale of components may differ from the actual scale for ease of understanding, and structures not relevant to the features of the present application are omitted from illustration.

[0029] use Figures 1 to 5 The rotating electrical machine according to the first embodiment of the present application will be described.

[0030] In this embodiment 1, an example of application to an electric power steering system in which a rotating electrical machine is mounted on a vehicle is shown. In order to assist the steering force of the vehicle, a control device is required in addition to the rotating electrical machine, but the control device is not shown in the figure. Figure 1 This is a cross-sectional view for explaining the structure of a rotating electrical machine. Figure 2 yes Figure 1 Magnified view of part A.

[0031] The frame 2, which serves as the housing of the rotating electrical machine 1, is a generally cylindrical shape with an opening at the rear (upper side in the figure). It is made of an inexpensive and lightweight aluminum alloy. The stator 3 is formed by stacking electromagnetic steel sheets. A stator winding 5 is wound around it via an insulator 4, which serves as an insulator. Terminals 6 for supplying current to the stator winding 5 and retainers 7 for securing the terminals 6 are provided.

[0032] Symbol 8 is a ring-shaped member. Figure 3 The annular member 8 is made of acetal resin, fluororesin, etc., which has a lower hardness than the aluminum alloy used as the material of the frame 2 and has excellent wear resistance. It has a ring shape with chamfered portions 8a and 8b on the upper and lower edges of the outer peripheral side of the quadrilateral cross section. The outer diameter 8c is set larger than the hole diameter 2a of the frame 2, similar to the outer diameter 3a of the stator 3. The annular member 8 and the stator 3 are as shown. Figure 4 As shown by the middle arrow, the annular member 8 and the stator 3 are sequentially pressed in from the opening on the rear side of the frame 2 , and the annular member 8 and the stator 3 are placed in contact with each other.

[0033] A bearing 9 is fixed to the front side of the frame 2 , and a bearing 11 is fixed to the rear side of the frame 2 via a bearing seat 10 formed of carbon steel.

[0034] A rotor 14 provided with a magnet 13 is fixed to the rotor shaft 12 and rotatably supported by the bearings 9 and 11. The rotor 14 is disposed so as to be separated from the stator 3 and surrounded by the stator 3.

[0035] Furthermore, a sleeve 15 for assembly with the vehicle is provided at the front end of the rotor shaft 12 , and a rotation angle detection sensor for detecting the rotation state of the rotor 14 is provided at the rear omitted portion of the rotor shaft 12 .

[0036] Reference numeral 16 denotes a heat sink equipped with a control device (not shown), which is fixed to the rear opening of the frame 2. The control device includes a power conversion circuit and a control circuit, which have power semiconductors that convert external DC current. The required current is supplied to the stator winding 5 via the terminal 6. This generates a rotational force in the rotor 14, causing the rotor shaft 12 and, consequently, the sleeve 15, to rotate.

[0037] Then, through Figure 4 The following describes the process of press-fitting the annular member 8 and stator 3 into the frame 2. First, the annular member 8 and stator 3 are placed in the rear opening of the frame 2. A load is applied to the stator 3, guiding it between the chamfered portion 8a of the annular member 8 and the press-fit tapered portion 2b of the frame 2, thereby press-fitting the annular member 8 into the frame 2. The annular member 8 has a lower hardness than the frame 2, but because it is made of a softer, more wear-resistant material, it does not scrape the frame 2 during the press-fit process.

[0038] Next, after the edge portion 3b of the press-fit front end side of the stator 3 is guided to the press-fit introduction cone 2b of the frame 2, the stress will become locally excessive due to the collision with the edge 2c of the press-fit introduction portion, thereby generating filamentary debris, that is, foreign matter generated during the manufacturing process of the rotating electric machine. These foreign matter will adhere to the edge portion 3b of the stator 3 or fall off into the space 17 surrounded by the chamfered portion 8b of the annular member 8, the stator 3 and the frame 2.

[0039] Furthermore, since stator 3 is formed by laminating electromagnetic steel sheets, there are step differences caused by the lamination at the contact surface with frame 2. During the press-fitting process, frame 2, formed of a low-hardness aluminum-based material, can be scraped and attached to edge 3b of stator 3 or fall into space 17 enclosed by chamfered portion 8b of annular member 8, stator 3, and frame 2. Even if subjected to vibration, impact, etc., these debris will not fall out of the enclosed space 17.

[0040] Without the ring member 8, the debris would move within the frame 2 due to vibrations, shocks, and the like. If it were to enter between the stator 3 and rotor 14 or between the bearings 9 and 11, it would impede normal rotation. Furthermore, since the debris is made of aluminum, it is conductive, so if it were to adhere to conductive parts such as the terminal 6, it could cause a short circuit.

[0041] In the structure of this embodiment, a highly reliable rotating electrical machine can be provided, in which chips of the frame 2 are not scattered into the frame 2 when the stator 3 is press-fitted into the frame 2 .

[0042] Next, in this embodiment, the annular member 8 may be formed of a porous resin, such as a fluorine-based sponge, and impregnated with a lubricant such as mineral oil or liquid paraffin. When the annular member 8 is press-fitted into the frame 2, the lubricant impregnated into the annular member 8 is evenly applied to the press-fit surfaces of the frame 2 and the stator 3, thereby reducing wear on the press-fit surfaces of the frame 2 and the stator 3 and suppressing the generation of debris.

[0043] In addition, in this embodiment, the annular member 8 is in a ring shape with a quadrilateral cross section and chamfered portions 8a and 8b at the upper and lower edges on the outer peripheral side, but as long as Figure 5 The cross section of the O-ring shown in the perspective view is annular such as a circle, but the cross section may also have other shapes.

[0044] By making the cross section of the annular member 8 circular or Figure 2The polygonal shape shown as an example can extend over the entire circumference of the inner circumference of the frame 2, which is surrounded by the annular member 8, the stator 3, and the frame 2. The aforementioned filamentary debris, i.e., foreign matter generated during the manufacturing process of the rotating electrical machine, is retained in the annular space 17 extending over the entire circumference of the inner circumference of the frame 2, and is prevented from moving from the area of ​​the space 17 to areas other than the area of ​​the space 17, such as the gap 314g between the stator 3 and the rotor 14, the coil side ends of the stator 3, and the bearings 9 and 11.

[0045] Implementation Method 2

[0046] use Figures 6 to 8 Next, a rotating electric machine according to a second embodiment of the present application will be described. This embodiment, like the first embodiment, also shows an example of application to an electric power steering device mounted on a vehicle.

[0047] Figure 6 is a cross-sectional view for explaining the structure of the rotating electrical machine according to the second embodiment. Figure 7 yes Figure 6 Magnified view of part A. Figure 8 This is a diagram illustrating the press-fitting process.

[0048] In the first embodiment, the annular member 8 and the stator 3 are separate components, which are placed and press-fitted into the rear opening of the frame 2 . However, in the second embodiment, the stator 3 and the annular member 8 are integrated and press-fitted.

[0049] In the figure, the stator 3 is formed by stacking electromagnetic steel plates, and its pressed front end side has a small diameter portion 3c that is smaller than the outer diameter 3a. An annular component 8 made of polyacetal resin, fluororesin, etc., which has a lower hardness than the aluminum alloy used as the material of the frame 2 and has excellent wear resistance, is fixed or externally molded on the small diameter portion 3c.

[0050] The outer diameter 8 c of the annular member 8 is set larger than the hole diameter 2 a of the frame 2 similarly to the outer diameter 3 a of the stator 3 , and the annular member 8 is press-fitted into the frame 2 together with the stator 3 .

[0051] The other structures and functions are the same as those in the first embodiment.

[0052] Since the annular member 8 is integral with the stator 3, press-fitting operation is easy. Furthermore, even when the annular member 8 is formed of a porous resin, such as a fluorine-based sponge, and impregnated with a lubricant, such as mineral oil or liquid paraffin, as in the first embodiment, the lubricant can be impregnated and pressed without contacting the annular member 8. This prevents contamination of the operating environment and improves operating efficiency.

[0053] Implementation 3

[0054] use Figures 9 to 12 Next, a rotating electric machine according to a third embodiment of the present application will be described. This embodiment, like the first and second embodiments, also shows an example of application to an electric power steering device mounted on a vehicle.

[0055] Figure 9 is a cross-sectional view for explaining the structure of the rotating electrical machine according to the third embodiment. Figure 10 yes Figure 9 Magnified view of part A. Figure 11 This is a diagram illustrating the press-fitting process.

[0056] exist Figures 9 to 12 In the embodiment, the annular member 8 is as follows Figure 12 As shown in the perspective view of FIG, the stator 3 has a rectangular cross-section and is thin-sheet-shaped, and is disposed on the frame 2. In this case, the annular member 8 does not necessarily need to be press-fitted into the frame 2. Alternatively, the annular member 8 may be insert-molded onto the frame 2. In this state, the stator 3 is press-fitted so that the annular member 8 contacts the stator 3.

[0057] By making the annular member 8 from a material such as resin that is softer and more elastic than aluminum alloy, the annular member 8 and the stator 3 can be brought into close contact with each other without a gap.

[0058] By forming the annular member 8 from a material having a Young's modulus lower than that of the aluminum alloy serving as the material of the frame 2,

[0059] In this case, the debris attached to the edge 3b of the stator 3 and the debris falling onto the annular member 8 are clamped by the contact portion between the annular member 8 and the stator 3 at the time when the pressing of the stator 3 is completed, and will not be scattered into the frame 2 even if vibration, impact, etc. are applied.

[0060] Furthermore, by making a part or the entire annular member 8 adhesive, debris that falls off during the press-fitting process can adhere to the adhesive portion of the annular member 8 and not move, thereby more reliably preventing the debris from being scattered into the frame 2.

[0061] Implementation 4

[0062] In the above, the first to third embodiments have been described with respect to the structure in which the stator 3 formed by stacking electromagnetic steel sheets is directly press-fitted into the frame 2. However, it is also possible to Figures 13 to 15 As in the illustrated fourth embodiment of the present application, the stator 3 is applied to a structure in which the stator 3 is press-fitted and fixed to a thin-walled cylindrical member 18 formed of carbon steel or the like.

[0063] Figure 14 yes Figure 13 An enlarged view of part A, Figure 15 This is a diagram illustrating the press-fitting process.

[0064] from Figure 13 、 Figure 14 and Figure 15 It can be seen that in the case of the fourth embodiment, since the press-fit surface in contact with the frame 2 has no step difference formed by laminating the electromagnetic steel sheets of the stator 3, scraping of the frame 2 by press-fitting can be suppressed, and a more reliable rotating electrical machine can be provided.

[0065] Embodiments 1 to 4 of the present application generally have the following features.

[0066] Feature 1: a rotor shaft supported by a bearing; a rotor mounted on the rotor shaft and rotating together with the rotor shaft; a stator surrounding the rotor with a gap 314g therebetween to enable the rotation of the rotor; a frame surrounding the rotor and the stator and having the outer periphery of the stator mounted on its inner periphery; and an annular member having an outer periphery extending over the entire inner periphery of the frame to prevent foreign matter present in a portion between the inner periphery of the frame and the outer periphery of the stator from moving to an area other than the portion between the inner periphery of the frame and the outer periphery of the stator, the annular member being arranged on the front side of the stator, the stator being formed of electromagnetic laminated steel plates, the stator being press-fitted into the frame along the extending direction of the rotor shaft, the annular member being arranged to be located further forward in the press-fitting direction than a press-fit portion 3p of the stator. In other words, a rotating electrical machine includes: a rotor shaft; a rotor fixed to the rotor shaft; a stator formed by stacking electromagnetic laminated steel plates and arranged to surround the rotor; a stator winding fixed to the stator; a frame that press-fits and holds the stator to the frame; and an annular member arranged in contact with the frame and positioned forward of a press-fit portion 3p of the stator in the direction of press-fitting. This prevents debris from the frame from scattering into the rotating electrical machine. This prevents debris from interfering with rotation or short-circuiting the current to the stator winding.

[0067] Feature 2: Because the annular member is press-fitted into the frame, debris from the frame is prevented from scattering into the rotating electrical machine, thereby preventing the debris from hindering rotation or short-circuiting the stator windings. Furthermore, the need for shrink fit is eliminated.

[0068] Feature 3: Since a space is formed by the annular member, the stator, and the frame, debris of the frame can be more reliably prevented from being scattered into the rotating electrical machine, thereby preventing the debris from hindering rotation or short-circuiting the stator winding.

[0069] Feature 4: Since the annular member is fixed to the stator and the annular member and the stator are integrated, press-fitting workability is improved.

[0070] Feature 5: Since the annular member is formed of a material having a lower hardness than the frame, debris of the frame can be prevented from being scattered into the rotating electrical machine, thereby preventing the debris from hindering rotation or short-circuiting the stator winding.

[0071] Feature 6: Since the annular member is impregnated with lubricant, the lubricant impregnated in the annular member is evenly applied to the press-fit surfaces of the frame and the stator, making the press-fit surfaces of the frame and the stator less susceptible to wear and suppressing the generation of debris.

[0072] Feature 7: Since the annular member is arranged on the frame and fixed to the frame, the debris is clamped by the contact portion between the annular member and the stator when the stator is pressed into place, and will not be scattered into the frame even if vibration, impact, etc. are applied.

[0073] Feature 8: Since the annular member is formed of a material having a Young's modulus lower than that of the frame, by making the annular member a material such as resin that is softer and more elastic than aluminum alloy, it can adhere tightly to the stator without a gap, and debris is clamped by the contact portion between the annular member and the stator at the time when the stator is pressed in, and will not be scattered into the frame even if vibration, impact, etc. are applied.

[0074] Feature 9: Since a part or the whole of the annular member has adhesive properties, in other words, since at least a part of the annular member has adhesive properties, the annular member is bonded to at least one of the stator and the frame. Therefore, by making the annular member have adhesive properties, the debris that falls off during the pressing process can be stuck and not move. The debris is clamped by the contact part between the annular member and the stator at the time when the pressing of the stator is completed, and will not be scattered into the frame even if vibration, impact, etc. are applied.

[0075] Feature 10: Since the stator is held by a thin-walled cylindrical member, in other words, since the outer periphery of the stator is covered by the cylindrical member, the stator is mounted on the frame via the cylindrical member. Therefore, the press-fit surface in contact with the frame does not have a step difference formed by stacking the electromagnetic steel sheets of the stator. Therefore, the frame is prevented from being scraped by press-fitting, and a more reliable rotating electric machine can be provided.

[0076] Feature Item 11: A rotating electric machine comprising: a rotor shaft supported by a bearing; a rotor mounted on the rotor shaft and rotating together with the rotor shaft; a stator surrounding the rotor with a gap therebetween to enable the rotation of the rotor; a frame surrounding the rotor and the stator and having the outer periphery of the stator mounted on its inner periphery; and an annular member arranged so that its outer periphery extends over the entire circumference of the inner periphery of the frame, thereby preventing residual foreign matter remaining at a boundary between the frame and the stator from being transferred to the boundary. The frame is moved to different areas to prevent residual foreign matter such as frame debris generated during the manufacturing process and remaining at the boundary between the frame and the stator. During the manufacturing process of the rotating electric machine including the assembly process of the rotating electric machine, during the assembly process of the rotating electric machine to a vehicle including a two-wheeled vehicle, or due to the vibration of the rotating electric machine during operation of the vehicle, the frame is moved to areas different from the boundary, such as the coil side ends of the stator winding, the bearings, the gap between the rotor and the stator, etc., so as not to have adverse effects on the coil side ends, the bearings, the gap, etc.

[0077] In addition, in each figure, the same reference numerals represent the same or corresponding parts.

[0078] Furthermore, each embodiment can be modified, omitted, or combined as appropriate.

[0079] In addition, this application describes various exemplary embodiments and examples, but the various features, methods, and functions described in one or more embodiments are not limited to the application of specific embodiments and can be applied to the embodiments alone or in various combinations.

[0080] Therefore, numerous modifications not shown are contemplated within the technical scope disclosed in this application. For example, these include modifying, adding, or omitting at least one component, and also include extracting at least one component and combining it with components from other embodiments.

[0081] (Explanation of Symbols)

[0082] 1. Rotating electric machine; 2. Frame; 2. Aperture; 2. Press-fit guide cone; 2. Edge of press-fit guide; 3. Stator; 3. Outer diameter; 3. Edge; 3. Small diameter; 3. Press-fit portion; 4. Insulator; 5. Stator winding; 6. Terminal; 7. Retainer; 8. Ring member; 8. Chamfered portion; 8. Chamfered portion; 8. Outer diameter; 9. Bearing; 10. Bearing seat; 11. Bearing; 12. Rotor shaft; 13. Magnet; 14. Rotor; 15. Bushing; 16. Heat sink; 17. Space; 18. Thin-walled cylindrical member; 3.14g. Gap.

Claims

1. A rotating electrical machine, characterized in that: include: a rotor shaft supported by a bearing; a rotor mounted on the rotor shaft and rotating together with the rotor shaft; a stator, the stator surrounding the rotor with a gap therebetween to enable the rotation of the rotor; a frame, the frame surrounding the rotor and the stator, and having an outer circumference of the stator mounted on an inner circumference thereof; as well as an annular member provided along the inner periphery of the frame to prevent foreign matter present at the boundary between the frame and the stator from moving to an area different from the boundary; The stator is formed of electromagnetic laminated steel plates and is press-fitted into the frame along one side in the axial direction in which the rotor shaft extends. The annular member is disposed at a position closer to the axial side than the press-fit portion of the stator. The annular member is an annular member formed of resin, The surface of the annular member on the other axial side contacts the surface of the stator on the one axial side. The surface on one side in the axial direction of the annular member abuts against the surface on the other side in the axial direction of the annular stepped portion protruding from the inner peripheral surface of the frame toward the inner peripheral side. The outer peripheral surface of the annular member abuts against the inner peripheral surface of the frame. The inner peripheral surface of the annular member does not abut against other members, and a space is provided on the inner peripheral side of the annular member.

2. The rotating electrical machine according to claim 1, wherein The cross-section of each circumferential portion of the annular member cut in the radial direction has the following shape: a rectangular shape having sides parallel to the radial direction and the axial direction, and two corners on one axial side and the other axial side of the outer circumference of the rectangle have chamfered portions, An annular space for holding the foreign matter is formed, which is surrounded by the surface of the chamfered portion on the other axial side, the surface of the stator on the one axial side, and the inner peripheral surface of the frame.

3. The rotating electrical machine according to claim 1, wherein The annular member is press-fitted into the frame.

4. The rotating electrical machine according to claim 2, wherein: The annular member is press-fitted into the frame.

5. The rotating electrical machine according to any one of claims 1 to 4, characterized in that The annular member is fixed to the stator.

6. The rotating electrical machine according to any one of claims 1 to 4, characterized in that The annular member has a lower hardness than the frame.

7. The rotating electrical machine according to claim 5, wherein: The annular member has a lower hardness than the frame.

8. The rotating electrical machine according to any one of claims 1 to 4 and claim 7, characterized in that The annular member is impregnated with a lubricant.

9. The rotating electrical machine according to claim 5, wherein: The annular member is impregnated with a lubricant.

10. The rotating electrical machine according to claim 6, wherein The annular member is impregnated with a lubricant.

11. The rotating electrical machine according to any one of claims 1 to 4, claim 7, claim 9 and claim 10, characterized in that The annular member is formed of a material having a Young's modulus lower than that of the frame.

12. The rotating electrical machine according to claim 5, wherein The annular member is formed of a material having a Young's modulus lower than that of the frame.

13. The rotating electrical machine according to claim 6, wherein The annular member is formed of a material having a Young's modulus lower than that of the frame.

14. The rotating electrical machine according to claim 8, wherein The annular member is formed of a material having a Young's modulus lower than that of the frame.

15. The rotating electrical machine according to any one of claims 1 to 4, 7, 9, 10, and 12 to 14, characterized in that: At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

16. The rotating electrical machine according to claim 5, wherein At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

17. The rotating electrical machine according to claim 6, wherein At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

18. The rotating electrical machine according to claim 8, wherein At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

19. The rotating electrical machine according to claim 11, wherein At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

20. The rotating electrical machine according to any one of claims 1 to 4, 7, 9, 10, 12 to 14, and 16 to 19, characterized in that The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

21. The rotating electrical machine according to claim 5, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

22. The rotating electrical machine according to claim 6, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

23. The rotating electrical machine according to claim 8, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

24. The rotating electric machine according to claim 11, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

25. The rotating electrical machine according to claim 15, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

26. A rotating electrical machine, characterized in that: include: a rotor shaft supported by a bearing; a rotor mounted on the rotor shaft and rotating together with the rotor shaft; a stator, the stator surrounding the rotor with a gap therebetween to enable the rotation of the rotor; a frame, the frame surrounding the rotor and the stator, and having an outer circumference of the stator mounted on an inner circumference thereof; as well as an annular member provided along the inner periphery of the frame to prevent foreign matter present at the boundary between the frame and the stator from moving to an area different from the boundary; The stator is formed of electromagnetic laminated steel plates and is press-fitted into the frame along one side in the axial direction, that is, the extending direction of the rotor shaft. The frame has an annular stepped portion protruding from an inner peripheral surface of the frame toward the inner peripheral side on the axial side closer to the stator. The annular member is an annular member formed of resin, The annular member is disposed on the other axial side of the stepped portion. The surface on the other axial side of the annular member abuts against the surface on the one axial side of the stator, and the foreign matter is held by clamping the foreign matter between the surface on the other axial side of the annular member and the surface on the one axial side of the stator.

27. The rotating electrical machine according to claim 26, wherein: The annular member has a lower hardness than the frame.

28. The rotating electrical machine according to claim 26, wherein The annular member is impregnated with a lubricant.

29. The rotating electrical machine according to claim 27, wherein The annular member is impregnated with a lubricant.

30. The rotating electrical machine according to any one of claims 26 to 29, characterized in that The annular member is formed of a material having a Young's modulus lower than that of the frame.

31. The rotating electrical machine according to any one of claims 26 to 29, characterized in that At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

32. The rotating electrical machine according to claim 30, wherein At least a portion of the annular member has adhesiveness so that the annular member is bonded to at least one of the stator and the frame.

33. A rotating electrical machine according to any one of claims 26 to 29 and claim 32, characterized in that The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

34. The rotating electric machine according to claim 30, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

35. The rotating electric machine according to claim 31, wherein The outer periphery of the stator is covered with a cylindrical member, and the stator is attached to the frame via the cylindrical member.

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