JP2006014565A - Disk type rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disc type rotary electric machine in which the coil load can be reduced at the time of winding a stator coil around a stator teeth section and the cross-sectional area of the stator teeth section can be increased in the direction intersecting the axis perpendicularly. <P>SOLUTION: In the disc type rotary electric machine comprising a rotor 2 arranged with a permanent magnet 9, and a stator 3 having a stator teeth section 11 and a stator coil 12 wherein the rotor 2 and the stator 3 are arranged in the axial direction and the rotor 2 is held rotatably through an air gap to the stator 3, circumferential surface of the stator teeth section 11 for winding the stator coil 12 is constituted of six faces (five faces or more). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of a disk-type rotating electrical machine in which a stator and a rotor are opposed to each other in the axial direction.

  Loss is seen in interior permanent magnet synchronous motors (IPMSM) with permanent magnets embedded in the rotor and surface permanent magnet synchronous motors (SPMSM) with permanent magnets attached to the rotor surface. The range of application has been expanded to applications such as motors for electric vehicles and motors for hybrid vehicles because of their low efficiency, high efficiency, and high output (in addition to magnet torque, reluctance torque can also be used).

  Such a permanent magnet synchronous motor, in which an axial gap motor in which a stator and a rotor are arranged to face each other in the axial direction, can be reduced in thickness and is used in applications where layout is limited. An electric power unit using an axial gap motor has been introduced (see, for example, Patent Document 1). A compact unit can be obtained by using an axial gap motor. Moreover, the stator of this axial gap motor is comprised by the rectangular stator teeth part and circular stator back core part by an electromagnetic steel plate.

Thus, a stator can be easily produced by comprising a stator by the rectangular stator teeth part and circular stator back core part by an electromagnetic steel plate. Moreover, by using a magnetic steel sheet for the stator teeth portion, a large generated torque can be obtained without reducing the magnetic resistance in the stator.
Japanese Patent Laying-Open No. 2003-2277 (FIG. 3)

However, in the conventional axial gap motor, since the cross-sectional shape of the stator teeth portion in the direction perpendicular to the axis is a rectangle, the inner angle of the stator teeth portion is 90 °, and the stator coil is wound. The coil is loaded.
In addition, since the cross-sectional shape of the stator teeth portion in the direction perpendicular to the axis is a rectangle, the tooth groove formed between adjacent stator teeth portions gradually expands from the innermost peripheral position toward the outermost peripheral position. It becomes. Therefore, there is a problem that the cross-sectional area in the direction perpendicular to the axis of the stator teeth portion is reduced by the increase in the gap area with respect to the area occupied by the stator.

  The present invention has been made paying attention to the above problem, and can reduce the coil load when the stator coil is wound around the stator tooth portion, and can reduce the cross-sectional area in the direction perpendicular to the axis of the stator tooth portion. An object of the present invention is to provide a disk-type rotating electrical machine that can be increased.

In order to achieve the above object, the present invention comprises a rotor having a permanent magnet disposed therein, a stator having a stator teeth portion and a stator coil, and the rotor and the stator are disposed in an axial direction. And the rotor is a disk-type rotating electrical machine held rotatably with respect to the stator.
The peripheral surface around which the stator coil of the stator tooth portion is wound is constituted by five or more side surfaces.

  Therefore, in the disk-type rotating electrical machine of the present invention, the stator coil is wound around the peripheral surface of the stator tooth portion constituted by five or more side surfaces. For example, when the cross-sectional shape of the stator teeth portion in the direction perpendicular to the axis is a regular pentagon, the internal angle can be an internal angle exceeding 90 ° so that the internal angle is 108 °, and the internal angle is configured by 90 °. Compared to the rectangular cross section, the load applied to the stator coil during winding can be reduced. Further, by configuring the peripheral surface with five or more side surfaces, the area of the gap (tooth groove) between adjacent stator teeth portions can be reduced as compared to a rectangular cross section configured with four side surfaces. This is possible, and the cross-sectional area in the direction perpendicular to the axis of the stator teeth can be increased accordingly.

  The best mode for carrying out the disk-type rotating electrical machine of the present invention will be described below based on Examples 1 to 4 shown in the drawings.

First, the configuration will be described.
FIG. 1 is an overall cross-sectional view showing a disk-type rotating electrical machine to which the stator structure of Example 1 is applied. The disk-type rotating electrical machine includes a rotating shaft 1, a rotor 2, a stator 3, and a rotating electrical machine case. The rotating electrical machine case 4 includes a front side case 4a, a rear side case 4b, and an outer case 4c that is bolted to both side cases 4a and 4b.

  The rotary shaft 1 is rotatably supported by a first bearing 5 provided on the front side case 4a and a second bearing 6 provided on the rear side case 4b. In addition, a rotation sensor 7 for detecting the number of rotations of the shaft is provided at the rear end of the rotation shaft 1.

  The rotor 2 is fixed to the rotating shaft 1 and generates a reaction force on the permanent magnet 9 against the rotating magnetic flux applied from the stator 3 so that the rotating shaft 1 rotates about the rotating shaft 1. The rotor base 8 is made of a fixed electromagnetic steel plate (ferromagnetic material), and a plurality of permanent magnets 9 are embedded in the surface facing the stator 3. The plurality of permanent magnets 9 are arranged such that adjacent surface magnetic poles (N pole, S pole) are different from each other. Here, a gap called an air gap 10 exists between the rotor 2 and the stator 3 and does not contact each other.

  The stator 3 is fixed to the rear side case 4b, and includes a stator teeth portion 11, a stator coil 12, and a stator back core portion 13. The stator coil 12 is wound around the stator tooth portion 11 via both insulators 14, 15 and insulating paper 16, 17 described later. The stator 3 is held by the rear side case 4b via the stator back core portion 13.

  FIG. 2 is a front view showing a stator in the disk-type rotating electrical machine according to the first embodiment, and FIG. 3 is an enlarged view showing a stator tooth portion and a stator coil in the disk-type rotating electrical machine according to the first embodiment.

  In Example 1, the peripheral surface around which the stator coil 12 of the stator teeth portion 11 is wound is configured by six side surfaces. Moreover, the said stator teeth part 11 was comprised with the electromagnetic steel plate. Furthermore, the internal angle of each side surface constituting the stator teeth portion 11 was set to 90 ° or more.

  That is, as shown in FIG. 2 and FIG. 3, the circumferential surface around which the stator coil 12 of the stator teeth portion 11 is wound is the inner circumferential cylindrical surface when the 12 stator teeth portions 11 are annularly arranged. An inner peripheral surface 11a that defines the outer peripheral surface when the twelve stator teeth portions 11 are arranged in an annular shape, and 90 ° in the outer diameter direction from both ends of the inner peripheral surface 11a. Two first inclined side surfaces 11c, 11d having a divergence angle exceeding 90 mm and defining the teeth parallel grooves 18 between the adjacent stator teeth portions 11, 11, and 90 in the inner diameter direction from both ends of the outer peripheral surface 11b. It has six side surfaces including two second inclined side surfaces 11e and 11f that have a divergence angle exceeding ° and define the teeth triangular groove 19 between the adjacent stator teeth portions 11 and 11. Here, the side length by the first inclined side surfaces 11c and 11d is set longer than the side length by the second inclined side surfaces 11e and 11f. That is, inner angle a (intersection of first inclined side surfaces 11c and 11d and second inclined side surfaces 11e and 11f)> inner angle b (intersection of outer peripheral surface 11b and second inclined side surfaces 11e and 11f)> inner angle c (inner peripheral surface) 11a and the first inclined side surfaces 11c and 11d)> 90 °.

  Then, the ferromagnetic body and the insulating member (both insulators 14 and 15 and the insulating paper 16 and 17) constituting the stator teeth portion 11 are combined so that the cross-sectional area in the direction perpendicular to the axis of the ferromagnetic body is maximized. .

  That is, as shown in FIG. 3, among the peripheral surfaces of the six surfaces, the inner insulator 14 is disposed in contact with the inner peripheral surface 11a, and the outer insulator 15 is disposed in contact with the outer peripheral surface 11b. Two insulating papers 16 and 17 are disposed in contact with the pair of left and right first inclined side surfaces 11c, the second inclined side surface 11e, and the first inclined side surface 11d and the second inclined side surface 11f. A stator coil 12 is wound around the peripheral surface of the stator tooth portion 11 insulated by both the insulating papers 16 and 17.

Next, the operation will be described.
[Solutions]
In the conventional example (FIG. 3 of JP-A-2003-2277), the stator tooth portion is configured by combining electromagnetic steel plates in a rectangular shape. For this reason, the stator teeth are dense at the inner periphery, but there is a gap at the outer periphery, and magnetic flux cannot be obtained effectively. It was.

  Therefore, as shown in FIG. 4, there is a method of increasing the generated torque by making the ferromagnetic material of the stator teeth portion, for example, an electromagnetic steel sheet, into a substantially trapezoidal shape. However, the inner angle formed by the outer peripheral surface and the side surface of the stator tooth portion on the outer peripheral portion is an acute angle of less than 90 °, for example, 75 °. Therefore, in order to reduce the load on the stator coil, insulation The thickness of the body in the radial direction must be increased, which increases the size of the rotating electrical machine.

[Coil load reduction and cross-sectional area increase action]
First, FIG. 4 shows that the stator teeth in the case where the ferromagnetic material of the stator teeth portion is substantially trapezoidal (a), rectangular (b), and hexagonal (c) in Example 1. An example of the allocation of the ferromagnetic material and the insulator of the part is shown. In this case, the radial thickness t of the insulator that reduces the coil load when the stator coil is wound can be obtained by the following equation.
t = 5R-5Rcos (π-θ)
Here, R is the radius of the coil, and θ is the internal angle of the stator teeth.
As the internal angle θ becomes 120 ° → 90 ° → 75 °, an acute angle, the radial thickness t of the insulator increases from t3 → t2 → t1, and the internal angle θ becomes obtuse as 75 ° → 90 ° → 120 °. Accordingly, the radial thickness t of the insulator decreases from t1 → t2 → t3.

  Therefore, when the ferromagnetic material of the stator teeth part 11 of Example 1 is hexagonal, the ferromagnetic material of the stator teeth part 11 and the insulator are allocated so that the ferromagnetic material of the stator teeth part is substantially trapezoidal. Compared to the case of the case of the rectangular shape and the case of the rectangle, the allocation rate of the ferromagnetic material is the largest (the allocation rate of the insulator is the smallest).

  Subsequently, the cross-sectional areas in the direction perpendicular to the axis of the ferromagnetic material of the stator tooth portion 11 are compared. First, when the ferromagnetic material of the stator teeth portion is rectangular and the hexagonal shape of Example 1 is compared, the occupation area of the teeth groove between adjacent stator teeth portions is rectangular. It is clear that the hexagonal shape of Example 1 has a larger cross-sectional area in the direction perpendicular to the axis of the ferromagnetic material due to the larger area.

Next, FIG. 5 shows a cross-sectional area comparison example in which the ferromagnetic material of the stator tooth portion has a substantially trapezoidal shape (a) and the hexagonal shape in Example 1 (b). In this case, the hexagonal ferromagnetic material is divided by a line partitioned by an insulator in the case of a substantially trapezoidal shape, and triangular portions B and B that are reduced in cross-sectional area, and trapezoidal portion A that is increased in cross-sectional area, When comparing the areas of, as is clear from FIG.
A> 2B
It becomes the relationship.

  Therefore, in the case of the hexagonal shape (b) of Example 1 having the smallest insulator allocation rate, the cross-sectional area in the direction perpendicular to the axis of the ferromagnetic material of the stator teeth portion is secured wider than in the case of the substantially trapezoidal shape (a). can do. As described above, by adopting a shape having a maximum cross-sectional area as the ferromagnetic body of the stator tooth portion 11, the generated torque in the same dimension L can be maximized.

  As a result, by forming the ferromagnetic material of the stator teeth portion 11, for example, the side surfaces of the electromagnetic steel sheet with five or more surfaces (six surfaces in the first embodiment), the internal angle of each side surface is 90 ° or more. It is possible to reduce the coil load when winding the stator coil 12 while keeping the radial thickness t of the outer insulator 15 small. In addition, since the outer insulator 15 is not enlarged and the cross-sectional area of the ferromagnetic body in the direction perpendicular to the axis can be secured, the output torque can be increased when the sizes of the rotating electrical machines are the same. Further, if the output torque is made the same, the size of the rotating electrical machine can be reduced.

Next, the effect will be described.
In the disk-type rotating electrical machine according to the first embodiment, the effects listed below can be obtained.

  (1) A rotor 2 having a permanent magnet 9 disposed thereon, a stator 3 having a stator teeth portion 11 and a stator coil 12, and the rotor 2 and the stator 3 are disposed in an axial direction. The rotor 2 is a disk-type rotating electrical machine that is rotatably held with respect to the stator 3, and the peripheral surface around which the stator coil 12 of the stator teeth portion 11 is wound is defined by six side surfaces. Since it comprised, the coil load at the time of winding the stator coil 12 around the stator teeth part 11 can be reduced, and the axial orthogonal direction cross-sectional area of the stator teeth part 11 can be increased.

  (2) Since the stator teeth portion 11 is made of an electromagnetic steel plate, the occurrence of iron loss due to eddy current loss or the like inside the stator 3 can be reduced and can be easily manufactured.

  (3) Since the inner angle of each side face constituting the stator teeth portion 11 is set to 90 ° or more, when the stator coil 12 is wound around the stator teeth portion 11, Such a load can be reduced.

  (4) Combining the ferromagnetic material and the insulating member (both insulators 14 and 15 and insulating paper 16 and 17) constituting the stator teeth portion 11 so that the cross-sectional area in the direction perpendicular to the axis of the ferromagnetic material is maximized. Therefore, it is possible to further increase the generated torque while reducing the coil load when the stator coil 12 is wound around the stator teeth portion 11.

  (5) An inner peripheral surface 11a that defines an inner peripheral cylindrical surface when twelve stator teeth portions 11 are annularly arranged on a peripheral surface around which the stator coil 12 of the stator teeth portion 11 is wound; When twelve stator teeth portions 11 are arranged in an annular shape, the outer peripheral surface 11b that defines the outer peripheral cylindrical surface and the divergence angle exceeding 90 ° in the outer diameter direction from both ends of the inner peripheral surface 11a are adjacent to each other. Two first inclined side surfaces 11c, 11d that define the teeth parallel grooves 18 between the stator teeth portions 11, 11 and the outer peripheral surface 11b have divergence angles exceeding 90 ° in the inner diameter direction, adjacent to each other. The stator teeth 11 and 11 are configured by six side surfaces including two second inclined side surfaces 11e and 11f that define the tooth triangular groove 19 between the stator teeth portions 11 and 11, and thus the stator teeth having a rectangular or substantially trapezoidal shape. When compared to, while the thinnest radial thickness t of the outer insulator 15, it is possible to achieve a reduction of the coil load when winding the stator coil 12 to the stator teeth 11.

  (6) Out of the six peripheral surfaces, the inner insulator 14 is disposed in contact with the inner peripheral surface 11a, the outer insulator 15 is disposed in contact with the outer peripheral surface 11b, and a pair of left and right first slopes Two insulating papers 16 and 17 are disposed in contact with the side surface 11c, the second inclined side surface 11e, the first inclined side surface 11d, and the second inclined side surface 11f, and both the insulators 14, 15 and the both insulating papers 16, Since the stator coil 12 is wound around the peripheral surface of the stator tooth portion 11 insulated by 17, the stator coil 12 is wound around the stator tooth portion 11 when compared with the substantially tooth-shaped stator tooth portion. Sometimes, while achieving the same level of coil load reduction, the cross-sectional area of the ferromagnetic material can be expanded from the substantially trapezoidal stator teeth portion, and the generated torque can be increased.

  Example 2 is an example in which a cooling pipe for passing a refrigerant is disposed between stator teeth.

  That is, as shown in FIG. 6, the cooling pipe 20 through which the refrigerant passes is disposed between the twelve stator teeth portions 11. As in the first embodiment, the stator teeth portion 11 includes six side surfaces including an inner peripheral surface 11a, an outer peripheral surface 11b, two first inclined side surfaces 11c and 11d, and two second inclined side surfaces 11e and 11f. The cooling pipe 20 has two axial pipe portions 20a, 20a protruding in the axial direction along the teeth triangular groove 19 and the two axial pipe portions 20a, 20a. And a radial pipe portion 20b connected in the outer circumferential direction at the distal end portion on the rotor 2 side of the child teeth portion 11 and arranged every other stator tooth portion 11. Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

  Next, the operation will be described. According to the second embodiment, the vicinity of the stator coil 12 is cooled by flowing a refrigerant, for example, water, into the cooling pipe 20, thereby improving the cooling efficiency of the rotating electrical machine. Is possible. Although not shown, it is possible to further improve the cooling efficiency by molding the stator 3 with resin or the like. Since other operations are the same as those in the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the disk-type rotating electrical machine according to the second embodiment, the effects listed below can be obtained in addition to the effects of the first embodiment.

  (7) Since the cooling pipe 20 through which the coolant passes is disposed between the stator teeth 11, the continuous operation with higher output can be performed.

  (8) The stator tooth portion 11 is composed of six side surfaces including an inner peripheral surface 11a, an outer peripheral surface 11b, two first inclined side surfaces 11c and 11d, and two second inclined side surfaces 11e and 11f. The cooling pipe 20 includes two axial pipe portions 20a and 20a projecting in the axial direction along the teeth triangular groove 19, and the two axial pipe portions 20a and 20a. The radial pipe portion 20b connected in the outer circumferential direction at the rotor 2 side distal end portion of the stator coil 12 includes the outer peripheral position of the rotor 2 side distal end portion of the stator coil 12 that generates the most heat, and has high cooling efficiency. Thus, the stator coil 12 can be cooled.

  Example 3 is an example in which the stator teeth portion was manufactured by processing a substantially rectangular ferromagnetic material.

  That is, as shown in FIG. 7, the stator teeth portion 11 is manufactured by processing a substantially rectangular ferromagnetic body 30. That is, the stator teeth portion 11 includes the six sides of the inner peripheral surface 11a, the outer peripheral surface 11b, the two first inclined side surfaces 11c and 11d, and the two second inclined side surfaces 11e and 11f, as in the first embodiment. The stator teeth portion 11 is composed of upper and lower surfaces 30a and 30b and upper and lower surfaces 30a and 30b of a substantially rectangular ferromagnetic body 30 formed by upper and lower surfaces 30a and 30d. Surface 11a (or inner peripheral surface 11a and outer peripheral surface 11b) is provided with first inclined side surface 11c and second inclined side surface 11e, and first inclined side surface 11d and second inclined side surface 11f on the side surfaces of both side surfaces 30c and 30d. Produced by processing. Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

  Next, the operation will be described. According to the third embodiment, as shown in FIG. 7 (a), a substantially rectangular ferromagnetic body 30 having upper and lower surfaces 30a and 30b and both side surfaces 30c and 30d is prepared. 7 (b), the upper and lower surfaces 30a, 30b of the ferromagnetic body 30 are used as the outer peripheral surface 11b and the inner peripheral surface 11a as they are, and the first inclined side surface 11c and the second inclined surface are provided on the side surfaces of both side surfaces 30c, 30d. By processing the side surface 11e, the first inclined side surface 11d, and the second inclined side surface 11f, the stator teeth portion 11 is produced as shown in FIG. 7C. That is, it is possible to easily and accurately manufacture the stator tooth portion 11 only by processing the four surfaces. Since other operations are the same as those of the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the disk-type rotating electrical machine according to the third embodiment, in addition to the effects of the first embodiment, the following effects can be obtained.

  (9) Since the stator teeth portion 11 is produced by processing the substantially rectangular ferromagnetic body 30, the stator teeth portion 11 can be easily produced.

  (10) The stator tooth portion 11 is composed of six side surfaces including an inner peripheral surface 11a, an outer peripheral surface 11b, two first inclined side surfaces 11c, 11d, and two second inclined side surfaces 11e, 11f. The stator teeth portion 11 has the upper and lower surfaces 30a and 30b of the substantially rectangular ferromagnetic body 30 formed by the upper and lower surfaces 30a and 30b and the both side surfaces 30c and 30d as the outer peripheral surface 11b and the inner peripheral surface 11a. Since the first inclined side surface 11c and the second inclined side surface 11e and the first inclined side surface 11d and the second inclined side surface 11f are formed on the respective side surfaces 30c and 30d, only four of the six surfaces are processed. Thus, the stator tooth portion 11 can be easily manufactured with high accuracy.

  The fourth embodiment is an example in which a plurality of passages 23 are provided for one permanent magnet 9 in contrast to the third embodiment in which one passage 23 is provided for one permanent magnet 9.

  That is, as shown in FIG. 8, the stator teeth portion 11 is manufactured by combining ferromagnetic elements 11-1 to 11-13 having different shapes. That is, the stator teeth portion 11 includes the six sides of the inner peripheral surface 11a, the outer peripheral surface 11b, the two first inclined side surfaces 11c and 11d, and the two second inclined side surfaces 11e and 11f, as in the first embodiment. The stator teeth section 11 is divided into the ferromagnetic elements 11-1 to 11-13 having different shapes by dividing the direction along the inner and outer peripheral faces 11a and 11b as the dividing direction. The ferromagnetic elements 11-1 to 11-13 having different shapes are combined in a direction perpendicular to the inner and outer peripheral surfaces 11a and 11b. Since other configurations are the same as those of the first embodiment, the corresponding components are denoted by the same reference numerals and description thereof is omitted.

  Next, the operation will be described. According to Example 4, as shown in FIG. 8 (a), ferromagnetic elements 11-1 to 11-13 having different shapes are prepared and shown in FIG. 8 (b). As shown in FIG. 8 (c), the ferromagnetic elements 11-1 to 11-13 having different shapes are combined in a direction perpendicular to the inner and outer peripheral surfaces 11a and 11b. The stator teeth portion 11 is produced by integration by resin molding or adhesion. Therefore, the yield of the ferromagnetic material is good and it can be easily manufactured, so that the cost can be reduced. In addition, since the eddy current circuit on the side surface can be cut off, the efficiency can be increased. Since other operations are the same as those of the first embodiment, description thereof is omitted.

Next, the effect will be described.
In the disk-type rotating electrical machine according to the fourth embodiment, the following effects can be obtained in addition to the effects of the first embodiment.

  (11) Since the stator teeth portion 11 is manufactured by combining the ferromagnetic elements 11-1 to 11-13 having different shapes, the stator teeth portion can be more easily processed by processing into any shape. 11 can be produced.

  (12) The stator teeth portion 11 is composed of six side surfaces including an inner peripheral surface 11a, an outer peripheral surface 11b, two first inclined side surfaces 11c, 11d, and two second inclined side surfaces 11e, 11f. The stator teeth portion 11 is divided into the ferromagnetic elements 11-1 to 11-13 having different shapes by dividing the direction along the inner and outer peripheral surfaces 11a and 11b as the dividing direction. In order to fabricate the body elements 11-1 to 11-13 in a direction perpendicular to the inner and outer peripheral surfaces 11a and 11b, a laminated stator in which a large number of ferromagnetic elements 11-1 to 11-13 are laminated. The efficiency can be improved by the action of cutting off the eddy current circuit on the side surface of the tooth portion 11.

  As mentioned above, although the disk type rotary electric machine of the present invention has been described based on the first to fourth embodiments, the specific configuration is not limited to these embodiments, and each claim of the claims Design changes and additions are permitted without departing from the spirit of the invention.

  In Examples 1 to 4, an example of a disk-type rotating electrical machine having 8 counter electrodes is shown, but a disk-type rotating electrical machine having other counter electrodes may be used.

  Examples 1 to 4 describe the case where there is one rotor and one stator. For example, when there is one rotor and two stators, there are two rotors and one stator. In the case of two rotors and three stators, other combinations such as three rotors and two stators may be used.

  Although the example in which the cooling pipe 20 is arrange | positioned for every other stator teeth part 11 was shown in Example 2, 1 size is changed to each stator teeth part 11 by reducing a size or changing a shape. It is also possible to arrange the cooling pipes 20 one by one.

  In the first to fourth embodiments, an example in which the rotor and the stator have an air gap in the axial direction has been described. For example, only an oil film is interposed in a slight gap between the rotor and the stator (slip bearing state). In addition, those having substantially no air gap are also included.

  In the first to fourth embodiments, the disk-type rotating electrical machine is described. However, it may be applied as a disk-type motor or a disk-type generator.

1 is an overall cross-sectional view showing a disk-type rotating electrical machine to which a stator structure of Example 1 is applied. FIG. 3 is a front view illustrating a stator in the disk-type rotating electrical machine according to the first embodiment. FIG. 3 is an enlarged view showing stator teeth in the disk-type rotating electrical machine according to the first embodiment. When the ferromagnetic material of the stator teeth is substantially trapezoidal (a), rectangular (b), and hexagonal (c) of Example 1, the ferromagnetic material of the stator teeth It is a figure which shows an example of allocation of an insulator. It is a figure which shows the cross-sectional area comparative example in the case where the ferromagnetic body of a stator teeth part is a substantially trapezoid shape (a), and the hexagonal shape of Example 1 (b). It is the front view and side view which show the stator teeth and cooling pipe in the disk type rotary electric machine of Example 2. FIG. 10 is a diagram illustrating a processing procedure for stator teeth in the disk-type rotating electrical machine according to the third embodiment. It is a figure which shows the stator teeth combination procedure in the disk type rotary electric machine of Example 4. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Rotor 3 Stator 4 Rotating electrical machine case 5 1st bearing 6 2nd bearing 7 Rotation sensor 8 Rotor base 9 Permanent magnet 10 Air gap 11 Stator teeth part 11a Inner peripheral surface 11b Outer peripheral surface 11c, 11d First 1 inclined side surface 11e, 11f 2nd inclined side surface 12 stator coil 13 stator back core part 14 inner peripheral insulator 15 outer peripheral insulator 16, 17 insulating paper 18 teeth parallel groove 19 teeth triangular groove 20 cooling pipe 30 substantially rectangular shape Ferromagnetic

Claims (12)

A rotor having a permanent magnet, and a stator having a stator teeth portion and a stator coil, the rotor and the stator being arranged in an axial direction, and the rotor with respect to the stator In the disk-type rotating electrical machine held rotatably,
A disk-type rotating electrical machine characterized in that a circumferential surface around which a stator coil of the stator teeth portion is wound is constituted by five or more side surfaces. In the disk-type rotating electrical machine according to claim 1,
A disk-type rotating electrical machine characterized in that the stator teeth are made of electromagnetic steel plates. In the disk-type rotating electrical machine according to claim 1 or 2,
A disk-type rotating electrical machine characterized in that an inner angle of each side face constituting the stator tooth portion is set to 90 ° or more. In the disk type rotary electric machine according to any one of claims 1 to 3,
A disk-type rotating electrical machine comprising a combination of a ferromagnetic material and an insulating member constituting the stator tooth portion so that the cross-sectional area in the direction perpendicular to the axis of the ferromagnetic material is maximized. The disk type rotary electric machine according to any one of claims 1 to 4,
The peripheral surface around which the stator coil of the stator teeth is wound, the inner peripheral surface defining the inner peripheral cylindrical surface when the plurality of stator teeth are arranged in an annular shape, and the plurality of stator teeth are annular The outer peripheral surface that defines the outer peripheral cylindrical surface and an expansion angle of more than 90 ° in the outer diameter direction from both ends of the inner peripheral surface, and teeth parallel grooves between adjacent stator teeth portions. Two first inclined side surfaces defining two teeth inclined grooves between the adjacent stator teeth and having two first inclined side surfaces that define a divergence angle exceeding 90 ° in the inner diameter direction from both ends of the outer peripheral surface. And a disk-type rotating electrical machine comprising six side surfaces. In the disk-type rotating electrical machine according to claim 5,
An inner insulator is disposed in contact with the inner peripheral surface, an outer insulator is disposed in contact with the outer peripheral surface, and a pair of left and right first inclined side surfaces and second inclined side surfaces are provided. Place two sheets of insulating paper in contact,
A disk-type rotating electrical machine, wherein a stator coil is wound around a peripheral surface of a stator tooth portion insulated by the both insulators and the both insulating papers. The disk type rotating electrical machine according to any one of claims 1 to 6,
A disk-type rotating electrical machine, wherein a cooling pipe through which a refrigerant passes is disposed between the stator teeth. The disk-type rotating electrical machine according to claim 8,
The stator teeth portion is composed of six side surfaces including an inner peripheral surface, an outer peripheral surface, two first inclined side surfaces, and two second inclined side surfaces,
The cooling pipe includes two axial pipe portions protruding in the axial direction along the teeth triangular groove, and the two axial pipe portions are arranged in an outer peripheral direction at a rotor side tip of the stator teeth portion. A disk-type rotating electrical machine comprising a connecting radial pipe portion. In the disk type rotary electric machine according to any one of claims 1 to 7,
A disk-type rotating electrical machine, wherein the stator tooth portion is manufactured by processing a substantially rectangular ferromagnetic material. The disk-type rotating electrical machine according to claim 10,
The stator teeth portion is composed of six side surfaces including an inner peripheral surface, an outer peripheral surface, two first inclined side surfaces, and two second inclined side surfaces,
In the stator teeth portion, the upper and lower surfaces of the substantially rectangular ferromagnetic material having the upper and lower surfaces and both side surfaces are used as the inner and outer peripheral surfaces as they are, and the first inclined side surface and the second inclined side surface are provided on the respective side surfaces of the both side surfaces. A disk-type rotating electrical machine manufactured by processing. In the disk type rotary electric machine according to any one of claims 1 to 7,
A disk-type rotating electrical machine, wherein the stator tooth portion is produced by combining ferromagnetic elements having different shapes. The disk-type rotating electrical machine according to claim 11,
The stator teeth portion is composed of six side surfaces including an inner peripheral surface, an outer peripheral surface, two first inclined side surfaces, and two second inclined side surfaces,
The stator teeth are divided into ferromagnetic elements having different shapes by dividing the direction along the inner and outer peripheral surfaces as a dividing direction, and the ferromagnetic elements having different shapes are combined in a direction perpendicular to the inner and outer peripheral surfaces. A disk-type rotating electrical machine characterized by being manufactured by

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