Armature skeleton structure

Abstract

The present invention provides an armature skeleton structure, which is a skeleton structure of an armature of a three-phase motor with a slot number of 6N (N is a natural number) and a winding number of 3N, having a main magnetic pole inserted into a winding skeleton with windings wound thereon and an auxiliary magnetic pole inserted into an empty skeleton without windings wound thereon, the main magnetic pole and the auxiliary magnetic pole are arranged in a circumferential direction relative to a rotating axis, and abutment portions for contact between the empty skeleton and the winding skeleton are respectively formed on the outer side and the inner side of the slot formed between the main magnetic pole and the auxiliary magnetic pole.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on and claims the benefit of priority from Japanese Patent Application No. 2018-240519 filed with the Japan Patent Office on December 25, 2018, the entire contents of which are hereby incorporated by reference. Technical Field

[0003] The invention relates to a skeleton structure of an armature. Background Art

[0004] like Figure 1 As shown, the following technology is known: in the concentrated winding armature 200, in order to electrically insulate the winding 230 and the iron core 210, a winding skeleton (winding skeleton) 220, 250 is used. For example, in the following Japanese Patent Publication No. 2015-211563, as shown in FIG. Figure 1 In this way, at the bottom of the winding bobbins 220 and 250, the two bobbins 220 and 250 are overlapped and the jaws 225 are arranged. In this way, in the stator of the rotating armature 200 with concentrated winding having the winding bobbins 220 and 250, the insulation distance between the winding 230 and the iron core 210 becomes longer. Even in the vicinity of the overlapping jaws 225, the stator winding 230 can be wound. Therefore, the occupancy rate of the winding 230 inside the slot 250 can be increased. In this way, in the technology of Japanese Patent Publication No. 2015-211563, the winding 230 can be arranged in the space of the slot 250, and the winding 230 can be arranged with good space efficiency. Summary of the invention

[0005] The present invention provides a skeleton structure of an armature, which is a skeleton structure of an armature of a three-phase motor with a slot number of 6N (N is a natural number) and a winding number of 3N, comprising: a main magnetic pole, a winding skeleton with windings wound thereon is inserted into the main magnetic pole; and an auxiliary magnetic pole, an empty skeleton without windings wound thereon is inserted into the auxiliary magnetic pole, the main magnetic pole and the auxiliary magnetic pole are arranged in a circumferential direction relative to a rotating axis, and abutment portions where the empty skeleton and the winding skeleton contact are respectively formed on the outer side and the inner side of the slot formed between the main magnetic pole and the auxiliary magnetic pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a diagram showing an example of a skeleton structure of an armature described in Japanese Patent Application Laid-Open No. 2015-211563.

[0007] Figure 2 It is a diagram showing an example of a cross-sectional structure of an armature in the rotation axis direction according to an embodiment of the present invention, and is a diagram showing a winding.

[0008] Figure 3A 2 is a hollow skeleton stereogram showing the present embodiment. Figure 3B It is a side view showing an empty skeleton.

[0009] Figure 3C to Figure 3E This is a side view showing an example of a structure in which grooves or holes are formed in a hollow frame.

[0010] Figure 4A It is a three-dimensional diagram showing the iron core. Figure 4B It is a perspective view showing an example of the armature mounting structure according to the present embodiment.

[0011] Figure 5 It is a perspective view showing an example of the armature yoke mounting structure according to the present embodiment.

[0012] Fig. 6A 1 is a perspective view of a printed circuit board mounting structure in which a printed circuit board is assembled in the armature yoke mounting structure of the present embodiment. Figure 6B It is a cross-sectional view.

[0013] Fig. 7A , 7B This is a side view showing the structure in which the base portion is mounted on the yoke.

[0014] Figure 8 It means from Fig. 7A A cross-sectional view of the structure in which the model is formed in the state. DETAILED DESCRIPTION

[0015] In the detailed description below, for the purpose of illustration, in order to provide a thorough understanding of the disclosed embodiments, many specific details are set forth. However, it is apparent that one or more embodiments may be implemented without these specific details. In other cases, in order to simplify drawing, well-known structures and devices are schematically shown.

[0016] However, if Figure 1 As shown, if only the bobbin is arranged, the insulation between adjacent windings will deteriorate.

[0017] An object of the present invention is to provide an armature frame structure having improved insulation properties.

[0018] The present invention provides a skeleton structure of an armature. In a three-phase motor in which the number of slots of the motor armature is 6N (N is a natural number) and the number of windings is 3N, the skeleton structure of the armature includes: a main magnetic pole, a winding skeleton with windings wound thereon is inserted into the main magnetic pole; and an auxiliary magnetic pole, an empty skeleton without windings wound thereon is inserted into the auxiliary magnetic pole, the main magnetic pole and the auxiliary magnetic pole are arranged in a circumferential direction relative to a rotating axis, and abutment portions where the empty skeleton and the winding skeleton contact are respectively formed on the outer side and the inner side of the slot formed between the main magnetic pole and the auxiliary magnetic pole.

[0019] By forming the contact portion where the hollow bobbin and the winding bobbin come into contact, the winding bobbin can be covered by the hollow bobbin. As a result, the insulation properties of the winding wire can be improved.

[0020] The armature bobbin structure of the present invention is preferably such that the contact portion on the outer peripheral side of the slot is such that the hollow bobbin and the winding bobbin fit in a concave-convex manner at least in a portion and has an opening.

[0021] By fitting the projections and recesses at least partially, the movement of the hollow bobbin and the winding bobbin in the extending direction of the rotating shaft can be restricted. In addition, since the opening is provided, the heat transfer characteristics from the winding to the core can be improved.

[0022] The armature frame structure of the present invention preferably has grooves or holes formed on the outer peripheral side of the hollow frame.

[0023] This allows the mold resin to reach the windings, allowing resin molding to be performed. In addition, the heat dissipation effect of the motor can be improved.

[0024] The armature skeleton structure of the present invention preferably further includes a pedestal portion, which protrudes from one side surface of the hollow skeleton in the direction of the rotation axis and has a pedestal at the end, wherein the pedestal has a setting surface for setting the inner diameter end or the outer diameter end of the printed circuit board.

[0025] The printed circuit board can be positioned by providing a pedestal portion having a pedestal at the end for arranging the inner diameter end portion or the outer diameter end portion of the donut-shaped printed circuit board.

[0026] The armature skeleton structure of the present invention preferably has a truncated cone-shaped portion on the surface of the pedestal portion opposite to the installation surface, wherein the outer shape of the pedestal portion in the rotation axis direction is tapered to a truncated cone shape.

[0027] In this way, when the armature including the printed circuit board and the seat portion is integrally molded by resin, the inner peripheral side of the printed circuit board of the molded resin can be formed into a frustum shape. Therefore, parts and the like can be arranged in the space freed by forming the frustum shape.

[0028] According to the present invention, it is possible to provide an armature frame structure having improved insulation properties.

[0029] According to research on insulation degradation, when the wire is wound into a mold using resin such as casting or injection molding after winding, part of the conductor is squeezed out due to the injection pressure of the resin. In addition, the wire begins to break from the wound part and contacts the core of the armature and is grounded. This is one cause of insulation degradation.

[0030] Thus, in a rotating machine, increasing the winding occupancy ratio and forming a winding pattern with resin such as casting or injection molding can reduce the temperature of the armature, which results in an increase in the output of the rotating machine.

[0031] However, sufficient filling of the resin is required to ensure insulation performance.

[0032] In consideration of the above, a skeleton structure of an armature according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0033] In addition, the so-called (winding) bobbin refers to a tube around which an electric wire is wound to make a winding. It can be made of an insulating material. In addition, the so-called empty bobbin refers to a bobbin on which no electric wire (winding) is wound.

[0034] In addition, the circumference closer to the rotation axis C of the motor is called the inner circumference, and the circumference farther away is called the outer circumference. The direction along the rotation axis is called the rotation axis direction, and the direction extending radially with the rotation axis as the center is called the radial direction. In addition, the direction of rotation with the rotation axis as the center is called the circumferential direction. The side closer to the rotation axis with the rotation axis as the center is called the inner circumference side, and the side farther away from the rotation axis is called the outer circumference side. In this way, the positional relationship is explained with the rotation axis as the reference.

[0035] (First embodiment)

[0036] A first embodiment of the present invention will be described below.

[0037] In the present embodiment, an object is to solve the above-mentioned problem by making the empty bobbin part without the winding wire function and utilizing the empty bobbin.

[0038] Figure 2 1 is a diagram showing an example of a cross-sectional structure cut along a plane with the rotation axis of the motor armature X as a normal line, and is a diagram showing a winding. Symbol C is the rotation axis of the motor. The motor armature X is, for example, a cylindrical armature with a rotating rotor (motor) arranged on its inner circumference.

[0039] exist Figure 2In the example shown, the number of slots (S) provided in the core 1 is 6N (N is a natural number). The number of windings (3) is 3N, which is half the number of slots. In this way, in the core 1, the main magnetic poles 1a in which the bobbins 2 wound with the windings 3 are inserted and the auxiliary magnetic poles 1b in which the empty bobbins 4 without the windings 3 are inserted are alternately arranged. Figure 3A It is a hollow skeleton stereogram of this embodiment. On the other hand, Figure 3B It is a side view of an empty skeleton.

[0040] exist Figure 2 , Figure 3A In the configuration shown in the example, the main magnetic pole 1a and the auxiliary magnetic pole 1b are connected by the root (end part on the outer peripheral side) A and Figure 2 In the cross-sectional view of , lines C1 and C2 substantially perpendicular to the circumferential direction with respect to the lines B1 and B2 representing the side surfaces of the main magnetic pole 1a and the auxiliary magnetic pole 1b respectively (imaginary lines, the same applies hereinafter) define the outer peripheral shape (bottom) of the groove.

[0041] exist Figure 2 In the cross-sectional view of FIG. 1 , in the area surrounded by the lines D1, B2, and C2 along the outer side of the winding parallel to the line B1, the lines D1, B2, and C2 have an intersecting angle. Therefore, a gap 5 is formed between the winding 3 and the auxiliary magnetic pole 1b via the hollow frame 4.

[0042] like Figure 3A As shown, the hollow frame 4 is provided with a side wall portion 4b and a first jaw portion 4c on the hollow frame side, the side wall portion 4b being provided on both sides of a receiving portion 4a for inserting and receiving the auxiliary magnetic pole 1b, and the first jaw portion 4c on the hollow frame side being capable of gradually increasing the interval between the side wall portion 4b and the auxiliary magnetic pole 1b toward the outer peripheral side relative to the rotation axis C. The above-mentioned gap 5 is formed between the first jaw portion 4c and the auxiliary magnetic pole 1b.

[0043] On the other hand, Figure 2 As shown, the first jaw 2a covering the winding side of the winding 3 is formed on the outer circumference of the core 1 of the bobbin 2. Also, the second jaw 2b covering the winding side of the winding 3 is formed on the inner circumference of the core 1 of the bobbin 2.

[0044] Thus, the core 1 has, on the outer peripheral side, a first contact portion in which the first jaw 4 c on the hollow bobbin 4 side and the first jaw 2 a on the winding side of the winding bobbin 2 respectively contact with each other at their distal ends.

[0045] Furthermore, the hollow frame 4 is provided with a second jaw portion 4 d on the hollow frame side, and the width of the second jaw portion 4 d on the hollow frame side gradually increases from the side wall portion 4 b of the hollow frame 4 toward the inner diameter side of the core 1 .

[0046] Furthermore, the inner circumference of the core 1 has a second contact portion in which the second jaw 4d on the hollow bobbin 4 and the jaw 2b on the winding side of the winding bobbin 2 overlap and contact each other at their respective top ends. Thus, the insulation performance between the windings can also be improved on the inner circumference.

[0047] Alternatively, the second jaw 4d on the hollow bobbin 4 may be disposed on the inner circumference side of the jaw 2b on the winding side of the bobbin 2. This prevents the second jaw 4d on the hollow bobbin 4 from entering the winding 3.

[0048] In the above-mentioned structure, the winding 3 has a sufficient insulation distance from the auxiliary magnetic pole 1b by the hollow bobbin 4. Therefore, the winding 3 is not grounded.

[0049] As described above, according to this embodiment, the insulation performance between windings can be improved.

[0050] (Second embodiment)

[0051] Next, a second embodiment of the present invention will be described.

[0052] In the first embodiment, the first jaw 4 c is provided, so that the jaw 4 c completely functions as a wall to seal the inside of the motor. As a result, the heat generated from the winding 3 is continuously trapped in the space between the bobbin 2 and the hollow bobbin 4 .

[0053] Figure 3A is a three-dimensional diagram of an empty frame of this embodiment. Figure 3B It is a side view of an empty skeleton.

[0054] In addition, from Figure 3C to Figure 3E This is a side view showing an example of a structure in which grooves or holes are formed in a hollow frame.

[0055] like Figure 3A as well as Figure 3B As shown, in this embodiment, while expanding the width of the hollow frame 4, the hollow frame 4 is extended from the side wall 4b to the Figure 2 A groove or hole is formed at the end of the first jaw portion 4c extending from the outer peripheral side of the core 1 in the cross-sectional view. Figure 3B , an example in which projections and depressions 4c - 1 and 4c - 2 are provided is shown.

[0056] Figure 4A This is a three-dimensional diagram of the iron core. Next, Figure 4B FIG. 1 is a perspective view showing an example of the armature mounting structure of the present embodiment. Figure 4B As shown, Figure 4A The iron core 1 shown (indicated by 1a, 1b) has winding bobbins 2 on which winding wires are wound and empty bobbins 4 inserted alternately.

[0057] The concave and convex structures 2a-1 and 2a-2 formed on the first jaw 2a of the winding bobbin 2 and the end of the first jaw 4c of the hollow bobbin 4 are alternately formed with concave and convex parts in the direction of the rotation axis C. The concave and convex structures 4c-1 and 4c-2 of the first jaw 2a of the winding bobbin 2 and the first jaw 4c of the hollow bobbin 4 are fitted with each other at the contact part on the outer peripheral side. The winding 3 is thus covered.

[0058] In addition, for example Figure 4B As shown, the depth of the concave portion 4c-1 formed on the first jaw portion 4c of the hollow bobbin 4 can be made greater than the protruding length of the convex portion 2a-2 formed on the first jaw portion 2a of the winding bobbin 2. Figure 4B As shown, the opening 8 may be formed after the frame is assembled.

[0059] Thus, the outer circumferences of the bobbin 2 inserted into the main magnetic pole 1a and the hollow bobbin 4 inserted into the auxiliary magnetic pole 1b are provided with concave and convex shapes. As a result, when the bobbin 2 and the hollow bobbin 4 are overlapped, Figure 4B As shown, the winding can be seen from the opening 8. The mold enters from the opening 8 and adheres closely to the winding, thereby improving the thermal characteristics.

[0060] Therefore, the heat trapped in the space between the bobbin 2 and the empty bobbin 4 can be released to the outside.

[0061] In this embodiment, after winding and mounting, molding work such as casting or injection molding may be performed using varnish, resin, etc. In this way, the resin composition flowing through the gap 5 as a flow path can contact both the winding 3 and the auxiliary magnetic pole 1 b.

[0062] Therefore, there is no obstacle from the resin in contact with the first jaw portion 4c to the auxiliary magnetic pole 1b or the core back, so that the thermal conductivity (heat dissipation) can be improved.

[0063] Alternatively, the opening 8 may be structured as follows.

[0064] from Figure 3C to Figure 3E This is a side view showing an example of a structure in which grooves or holes are formed in a hollow frame.

[0065] 1) The opening 8 is formed by making the concave portion 4c-1a on the side of the hollow bobbin 4 deeper than the convex portion on the side of the winding bobbin 2 ( Figure 3C ).

[0066] 2) The recessed portion 4c-1b on the side of the hollow frame 4 is formed into a multi-stage recessed portion to form an opening 8 ( Figure 3D ).

[0067] 3) A window-like hole 9 is formed below the concave portion on the side of the hollow frame 4 ( Figure 3E).

[0068] Although the present invention is not limited to the above-described structure, in any structure, a groove or hole is formed on the outer peripheral side of the hollow bobbin 4. Alternatively, a groove or hole is formed in a part of the contact portion between the bobbin 2 and the hollow bobbin 4 on the outer peripheral side.

[0069] In this way, the mold resin can be Figure 2 ) reaches the winding 3 through the opening 8, thereby enabling resin molding. In addition, the heat dissipation effect can be improved.

[0070] In addition, the ends (contact portions) of the bobbin 2 and the empty bobbin 4 can be concave-convexly fitted along the rotation axis C. This can restrict the movement of the bobbin 2 and the empty bobbin 4 in the rotation axis C. Therefore, the bobbin 2 and the empty bobbin 4 can be fixed in the rotation axis direction.

[0071] Figure 5 It is a perspective view showing an example of the mounting structure of the armature yoke according to the present embodiment. Figure 5 The construction shown is from Figure 4B The state shown is a structure in which the bobbin 2 is inserted into the armature yoke 6. In this way, the armature stator is assembled and completed.

[0072] Fig. 6A This is a perspective view showing a printed circuit board mounting structure in which a printed circuit board is mounted in the armature yoke mounting structure according to the present embodiment. Figure 6B It is along Fig. 6A Cross-sectional view of line VIa-VIb.

[0073] Fig. 6A The construction shown is in Figure 5 In the structure shown, the printed circuit board 7 is mounted on the end surface of the armature yoke 6 .

[0074] As described above, according to this embodiment, in the armature yoke mounting structure, resin molding can be performed so that the mold resin reaches the winding. In addition, by providing the opening, the heat dissipation effect can be improved. In addition, the movement of the winding frame and the empty frame in the direction of the rotating axis can be restricted and fixed.

[0075] (Third embodiment)

[0076] Next, a third embodiment of the present invention will be described.

[0077] In the third embodiment of the present invention, Figure 3A , Figure 3BAs shown, a pedestal portion 4e is formed which protrudes (extends) outwardly in the direction of the rotation axis C of the core 1 from one side surface of the hollow frame 4 in the direction of the rotation axis C. In addition, a pedestal 4g is formed on the top end side of the pedestal portion 4e in the direction of the rotation axis C. A slightly flat setting surface is provided on the pedestal 4g, which can abut and place the inner or outer peripheral end of the donut-shaped printed substrate.

[0078] like Figure 3A , Figure 3B As shown, the printed circuit board 7 can be positioned by the installation surface of the base 4g installed at the end of the base part 4e of the hollow frame shown in the figure. The inner diameter position or outer diameter position of the donut-shaped printed circuit board 7 can be determined by such a base part 4e.

[0079] Furthermore, by providing a base portion 4e having a base 4g of a printed circuit board 7 on the hollow frame 4, as shown in FIG. Fig. 6A as well as Figure 6B As shown in the cross-sectional view of , the position of the base portion 4e can be set on the radially outer peripheral side.

[0080] Fig. 7A , 7B 4 is a side view showing a structure in which the base portion 4e is mounted on one end of the yoke 6. Fig. 7A As shown in FIG. 1 , in a state where the seat portion 4e is attached to the yoke 6, the position of the seat 4g of the seat portion 4e is arranged on the outer peripheral side of the inner diameter P1 of the core.

[0081] This has the advantage that the inner diameter of the flat donut-shaped printed circuit board 7 mounted on the base 4g of the base portion 4e can be larger than the inner diameter of the core (the center line of the core is represented by the symbol C, and the inner diameter of the core is represented by P1. The same applies hereinafter).

[0082] The above configuration allows the inner circumference P2 of the printed circuit board 7 to be larger than the inner diameter P1 of the core. By making the inner diameter P2 of the printed circuit board 7 larger than the inner diameter P1 of the core, a sufficient flow path in the direction of the rotation axis C of the resin mold can be ensured.

[0083] When the inner diameter of the core is large, components (bracket, bearing, etc.) can be arranged under the mold resin portion 11. This can shorten the overall length of the motor in the direction of the rotation axis C.

[0084] On the other hand, in this embodiment, the inner diameter P1 of the core can be reduced. Also, if the inner diameter P1 of the core is reduced as in this embodiment when the bearings used have the same size, it becomes difficult to arrange the bracket etc. under the mold resin 11.

[0085] Therefore, in this embodiment, it is also possible to Fig. 7A or Figure 8As shown, a truncated cone-shaped portion 4f is provided on the side of the base portion 4e opposite to the installation surface of the base 4g, which reduces the radial width of the base portion 4e toward the outside in the direction of the rotation axis C, that is, the top end tapers. In this way, the truncated cone-shaped portion 15 can also be formed on the mold resin 11.

[0086] Therefore, parts such as brackets and bearings can be arranged below the frustum 15. This can shorten the overall length of the motor compared to when the brackets and bearings are arranged outside the molded resin portion 11 in the direction of the rotation axis C.

[0087] In the case of a structure in which a pedestal is provided on the winding frame side, when the pedestal is formed into a truncated cone, the area in which the wire can be wound becomes smaller. If the area in which the wire can be wound becomes smaller, the overlapped portion of the winding increases accordingly. As a result, the total length of the motor becomes longer.

[0088] When a pedestal is provided on the winding frame and the pedestal is not in a frustoconical shape, the winding is modeled straight in the molding process, so that the frustoconical portion cannot be formed on the molding resin. Therefore, parts such as brackets and bearings are arranged outside the winding frame. As a result, the overall length of the motor becomes longer (undesirable).

[0089] On the other hand, in this embodiment, the pedestal 4e is provided on the empty bobbin 4 on which the winding 3 is not wound. Therefore, the pedestal 4e can be extended and formed at an arbitrary angle.

[0090] Therefore, as in the present embodiment, the base portion 4e is extended outward in the direction of the rotation axis C as a frustoconical portion 4f on the inner diameter side of the core 1 of the base portion 4e, so that the lower portion of the molded resin portion 11 also becomes a frustoconical portion 15 having a frustoconical shape. Therefore, parts and the like can be arranged thereunder. Therefore, the overall length of the motor can be shortened.

[0091] On the other hand, Figure 7B As shown, when the base portion 4e is taken as a reference along the line along the rotation axis C, Fig. 7A When mounted in a linearly symmetrical manner, the outer peripheral end of the donut-shaped printed circuit board 7 can be placed on the base 4g. In addition, the frustum-shaped portion 4f is formed on the outer diameter side of the core 1. Therefore, the outer diameter of the printed circuit board 7 can be made smaller than the outer diameter of the core.

[0092] Furthermore, the frustum-shaped portion 15 is also formed on the mold resin by the frustum-shaped portion 4f of the base portion 4e. Therefore, it is possible to suppress interference between the mold resin portion 11 and the components arranged outside the base portion 4e in the direction of the rotation axis C.

[0093] As described above, according to this embodiment, in an armature structure having a main magnetic pole with a winding skeleton inserted and a secondary magnetic pole without a winding, an empty skeleton without a winding is inserted into the auxiliary magnetic pole so that the jaws of the winding skeleton and the empty skeleton overlap. In this way, it is possible to improve the insulation performance of the skeleton structure of the armature. In addition, a groove or a hole is provided on a part of the empty skeleton, and the iron core and the winding are integrally formed by resin. In this way, the insulation distance between the winding and the magnetic pole can be ensured and the thermal conductivity can be improved.

[0094] Furthermore, the hollow frame is made into a structure in which the substrate is held by providing a pedestal portion extending in the direction of the motor rotation axis, so that the inner diameter of the substrate has a degree of freedom and the model flow path can be ensured.

[0095] The configurations and the like illustrated in the above-mentioned embodiments are not limited thereto. In addition, appropriate changes can be made within the scope of exerting the effects of the present embodiment. In addition, appropriate changes can be made within the scope not exceeding the purpose of the present invention.

[0096] In addition, each component of the present embodiment can be arbitrarily selected and excluded, and the invention including the configuration of selecting and excluding is also included in the present invention.

[0097] In addition, the skeleton structure of the armature of one embodiment of the present invention is the skeleton structure of the armature as follows, the number of slots of the motor armature is 6N (N is a natural number), in a three-phase motor with a winding number of 3N, a main magnetic pole inserted into a winding skeleton with windings wound thereon and an auxiliary magnetic pole inserted into an empty skeleton without windings wound thereon are arranged in a circumferential direction relative to a rotating axis, and the skeleton structure of the armature is characterized in that abutment portions where the empty skeleton and the winding skeleton contact are respectively formed on the outer side and the inner side of the slot formed between the main magnetic pole and the auxiliary magnetic pole.

[0098] The detailed description has been given for the purpose of example and illustration. In light of the above teachings, many variations and changes are possible. The detailed description is not exhaustive or intended to limit the subject matter described herein. Although the subject matter has been described in words with specific structural features and / or method processes, it should be understood that the subject matter defined in the claims is not necessarily limited to the specific features or specific processes described. More specifically, the specific features and specific processes are described as examples of implementing the claims.

[0099] The invention can be used for the skeleton structure of an armature.

Claims

1. An armature skeleton structure, which is a skeleton structure of an armature of a three-phase motor having 6N slots and 3N windings, wherein N is a natural number, The skeleton structure of the armature is characterized by comprising: A main magnetic pole, a bobbin with a winding wound thereon is inserted into the main magnetic pole; as well as Auxiliary magnetic poles, an empty frame without winding is inserted into the auxiliary magnetic poles, A resin is provided to fill a gap region between the auxiliary magnetic pole and the hollow frame, The main magnetic pole and the auxiliary magnetic pole are arranged in a circumferential direction relative to the rotation axis. Abutment portions with which the hollow bobbin and the winding bobbin come into contact are respectively formed on the outer circumferential side and the inner circumferential side of the slot formed between the main magnetic pole and the auxiliary magnetic pole.

2. An armature skeleton structure, which is a skeleton structure of an armature of a three-phase motor having 6N slots and 3N windings, wherein N is a natural number, The skeleton structure of the armature is characterized by comprising: A main magnetic pole, a bobbin with a winding wound thereon is inserted into the main magnetic pole; as well as Auxiliary magnetic poles, an empty frame without winding is inserted into the auxiliary magnetic poles, The main magnetic pole and the auxiliary magnetic pole are arranged in a circumferential direction relative to the rotation axis. Abutment portions where the hollow bobbin and the winding bobbin come into contact are formed on the outer circumference and inner circumference of the slot formed between the main magnetic pole and the auxiliary magnetic pole, respectively. The contact portion on the outer peripheral side of the groove is formed such that the hollow bobbin and the winding bobbin fit in a concave-convex manner at least in a portion, and the contact portion has an opening.

3. The armature skeleton structure according to claim 1 or 2, characterized in that: Grooves or holes are formed on the outer circumference of the hollow frame.

4. The armature skeleton structure according to claim 1 or 2, characterized in that: It also includes a seat portion that protrudes from one side surface of the hollow frame in the direction of the rotation axis and has a seat at its end. The seat has a setting surface for setting the inner diameter end or the outer diameter end of the printed circuit board.

5. The armature skeleton structure according to claim 4, characterized in that: The seat portion has a truncated cone-shaped portion formed in a truncated cone shape tapering toward the outside in the rotation axis direction on a surface opposite to the installation surface.

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