JP2003134713A - Stator for rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve performance by simplifying the structure of a stator for a rotating electric machine. SOLUTION: The stator 1 for a rotating electric machine is constituted such that a coil is secured to a plurality of pole teeth 4 that are aligned on the internal surface of an arcuate yoke 3 in the peripheral direction at intervals and interiorly protruded in the radial direction. The stator comprises: slot conductive parts 8 formed such that a plurality of first conductive plate materials 6 are arranged between the pole teeth 4, 4 that adjoin each other, and both ends of the first conductive plate materials 6 are exposed and molded with an insulating resin 7; and connecting conductive parts 10A, 10B formed such that both ends of second conductive plate materials 11 that make connectable ends of the first conductive plate materials 6 of the slot conductive parts 8, 8 that adjoin each other with the pole teeth 4 in-between, and that both ends of the second conductive plate materials are exposed and molded with an insulating resin 12. The coil is formed by connecting ends of the first conductive materials 6 of the slot conductive parts 8 and ends of the second conductive materials 11 of the connecting conductive parts 10A, 10B.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator used for a rotating electric machine such as a motor or a generator. 2. Description of the Related Art A conventional general stator for a rotating electric machine includes:
The magnetic pole teeth of the stator are wound around a magnet wire or a conductor formed by press molding or extrusion molding (hereinafter, described as an example of a magnet wire) (Japanese Utility Model Laid-Open No. 15469/1993). FIG. 5 is a cross-sectional view of a conventional general stator, and FIG.
FIG. 4 is an enlarged view of a portion, and in a conventional general stator 100,
In order to ensure insulation between the magnetic pole teeth 101 of the stator 100 and the magnet wires 110, the stator 10
It is necessary to mount an insulating material 104 such as insulating paper on the inner surface of the slot 103 surrounded by the yoke 102 and the pole teeth 101. Therefore, when winding a magnet wire, after attaching the insulating material 104 to the stator 100, for example, as shown in FIG. 7, the magnet wire 110 is pulled out from a nozzle 120 of a so-called nozzle winding machine. , The nozzle 120 is connected to the magnetic pole teeth 1 of the stator 100.
01. In addition, the winding method of the magnet wire 101 is described in Japanese Unexamined Patent Application Publication No.
Although there are various methods such as the method disclosed in Japanese Patent No. 15158, etc., they are the same in that a step of providing the insulating material 104 on the stator 100 before winding the magnet wire 110 is required. [0004] As described above, the conventional general stator 100 requires a step of attaching the insulating material 104 before winding the magnet wire 110, and this step is performed manually. In such a case, the cost was increased due to the extremely complicated and low productivity. There is also a method of mechanically mounting the insulating material 104 using a machine called a wedge insertion machine, but in that case, equipment cost is increased,
After all, the cost increases. When the above-mentioned nozzle winding machine is used, the nozzle 120 of the nozzle winding machine must be passed between the magnetic pole teeth 101, 101. It is necessary to provide a gap larger than the width of the nozzle 120 between the windings of
The tip shape of the magnetic pole teeth 104 and the magnet wire 11
The space factor of 0 is limited, which is a negative factor in improving the performance of the rotating electric machine. Further, when the above-mentioned nozzle winding machine is used, when the tension of the magnet wire 110 at the time of winding is large, the coating of the magnet wire 110 may be peeled off. It is necessary to perform a test by changing the tension for each wire diameter of each magnet wire 110 in advance, and to determine the optimum condition of the tension while visually confirming the peeling of the coating. However, the work takes an enormous amount of time, and Quality control was difficult due to variations in the presence or absence of coating peeling. Accordingly, the present invention provides a stator for a rotating electrical machine that can improve performance and reduce cost with a simple structure. [0007] In order to solve the above-mentioned problems, the invention described in claim 1 is directed to an annular yoke (for example, a yoke 3 in an embodiment to be described later) provided on an inner surface in a circumferential direction. A stator for a rotating electrical machine (for example, in a later-described embodiment) in which a coil is attached to a plurality of radially inwardly protruding magnetic pole teeth (for example, a magnetic pole tooth 4 in an embodiment to be described later) arranged at intervals. In the stator 1), a plurality of first conductive members (for example, a first conductive plate 6 in an embodiment described later) are arranged between adjacent magnetic pole teeth to expose both ends of the first conductive member. A slot conductive portion (for example, a slot conductive member in an embodiment described later) molded by an insulating resin (for example, an insulating resin 7 in an embodiment described later). 8) and a second conductive member (for example, a second conductive member in an embodiment described later) that enables connection between ends of the first conductive member of the slot conductive portion adjacent to each other with the magnetic pole teeth interposed therebetween. A conductive member for connection (for example, a conductive member for connection in an embodiment to be described later) formed by molding a conductive plate material 11) with an insulating resin (for example, an insulating resin 12 in an embodiment to be described later) with both ends thereof exposed. 10A,
10B), and joining the end of the first conductive member of the slot conductive portion and the end of the second conductive member of the connection conductive portion to the coil (for example, an embodiment described later). Is characterized in that the coil 20) is configured. With this configuration, it becomes possible to insulate the yoke and the magnetic pole teeth from the first conductive member and the second conductive member by using an insulating resin mold. A coil can be formed only by joining the two conductive members. An embodiment of a stator for a rotating electric machine according to the present invention will be described below with reference to FIGS. 1 to 4. 1 is a longitudinal sectional view of a stator for a rotating electric machine according to the present embodiment, FIG. 2 is an enlarged view of a portion A in FIG. 1, FIG. 3 is an exploded view as viewed from arrows BB in FIG. 1, and FIG. C-C
It is sectional drawing. The stator 1 includes a stator body 2 including an annular yoke 3 and a plurality of magnetic teeth 4 protruding inside the yoke 3. Magnetic teeth 4
It is arranged at equal intervals in the circumferential direction on the inner surface of the yoke 3 and protrudes inward in the radial direction. In the space surrounded by the adjacent magnetic pole teeth 4 and 4 and the yoke 3 in the stator 1, that is, in the slot 5, a plurality of (six in this embodiment) first conductive plate members 6 and insulating resin 7 are used. The configured slot conductive portion 8 is provided. The first conductive plate members 6 are arranged at regular intervals parallel to each other in the circumferential direction of the stator main body 2 with the longitudinal direction thereof along the axial direction of the stator main body 2.
These first conductive plate members 6 are molded with an insulating resin 7, thereby insulating each first conductive plate member 6 from the stator main body 2 and the first conductive plate members 6 adjacent to each other. Both ends 7b of the insulating resin 7 protrude slightly outward from both ends in the axial direction of the magnetic pole teeth 4 of the stator main body 2, and furthermore, both ends 6b of each first conductive plate 6 are formed.
a protrudes slightly outward from both ends 7b of the insulating resin 7 and is exposed. The slot conductive portion 8 is provided in each slot 5.
The first conductive plate 6 may be formed by filling the insulating resin 7 in the slot 5 and molding the resin in a state where the first conductive plate 6 is arranged in a predetermined manner. It is also possible to manufacture a plurality of unit portions 8 in advance and insert the slot conductive portions 8 into the slots 5 of the stator main body 2. Further, as shown in FIG.
On both outer sides in the axial direction, annular connecting conductive portions 10A and 10B for connecting the slot conductive portions 8 are provided.
The connecting conductive portions 10A and 10B are provided with a large number of second conductive plate materials 11 that enable the first conductive plate materials 6 of the slot conductive portions 8 and 8 adjacent to each other with the magnetic pole teeth 4 interposed therebetween;
An insulating resin 12 is used to insulate and mold the second conductive plate members 11 from each other. Second conductive plate 1
1 has a U-shaped cross section, and both ends thereof are slightly projected from the surface of the insulating resin 12 facing the stator body 2 to be exposed. The second conductive plate material 11 of the connecting conductive portions 10A, 10B is connected to the first conductive plate material 6 of the adjacent slot conductive portions 8, 8 with the magnetic pole teeth 4 interposed therebetween. The coil 20 surrounding the teeth 4 is formed. Here, the coil 20 surrounding the magnetic pole teeth 4 located at the center in FIG. 4 will be described as an example. In this embodiment, each slot conductive portion 8 has six first conductive plates 6, but the first conductive plate of the slot conductive portion 8 disposed on the left side of the central magnetic pole tooth 4 in FIG. 6, three first conductive plate members 6 disposed on the right side of the center pole teeth 4 and three first conductive plate members 6 disposed on the left side of the first conductive plate member 6 of the slot conductive portion 8 disposed on the right side of the center pole tooth 4. (1) The conductive plate 6 is connected to the conductive portion 1 for connection.
The coil 20 is formed by being spirally connected by the second conductive plates 11A and 10B as shown in FIG. In other words, the second conductive plate 11 is connected to the connection conductive portion 1 such that the first conductive plates 6 are spirally connected in this manner.
0A and 10B are regularly arranged. In the second conductive plate material 11 forming one coil 20, the connection conductive portions 10A and 10B are arranged in parallel at a distance from each other. Then, the first conductive plate 6 of the slot conductive portion 8 and the second conductive plate 11 of the connecting conductive portions 10A, 10B are welded or the like so that the coil 20 surrounding each magnetic pole tooth 4 is formed. The slot conductive portion 8 and the connecting conductive portions 10A and 10B are connected to each other to form the stator 1. In the stator 1 thus configured, the stator body 2 and the first conductive plate 6 and the adjacent first conductive plates 6 and 6 are reliably insulated by the insulating resin 7. In addition, the stator body 2 and the second conductive plate material 11 and the adjacent second conductive plate materials 11 are reliably insulated from each other by the insulating resin 12. Also, the first conductive plate 6 and the second conductive plate 11 are joined,
A coil 20 surrounding the magnetic pole teeth 4 is formed. Therefore, the configuration of the stator 1 is simplified. In addition, with this configuration, the stator 1 can be easily manufactured, and the following effects can be obtained accordingly. That is, the stator 1 thus configured does not require a step of attaching insulating paper or the like to the stator main body 2 and a step of winding a magnet wire or the like around the magnetic pole teeth 4 in a manufacturing stage. Therefore, equipment (such as a wedge insertion machine and a winding machine) related to them becomes unnecessary. In addition, in the stator 1 of this embodiment, resin molding equipment is required instead of such equipment, but the resin molding equipment is lower in cost than a wedge insertion machine, a winding machine, and the like. Down can be planned. Further, in the conventional case where the magnet wire is wound by using a winding machine, it is necessary to secure a gap for inserting a nozzle of the winding machine.
Of the tip of the magnetic pole teeth 4 is free from such restrictions. As the degree increases, the space factor of the first conductive plate 6 can be increased. Therefore, the performance of the rotating electric machine can be improved. Further, in the conventional case where the magnet wire is wound by using a winding machine, it is necessary to find the optimum condition of the tension in order to prevent the coating of the magnet wire from peeling off. This is unnecessary in the stator 1 in the form, and stable quality can be ensured. [Other Embodiments] The present invention is not limited to the above-described embodiment. For example, after joining the first conductive plate member 6 and the second conductive plate member 11, the gap between the slot conductive part 8 and the connecting conductive parts 10A and 10B is filled with resin and molded, whereby the gap is reduced. It may be closed. In the above-described embodiment, six first conductive plates 6 are arranged for one slot conductive portion 8, but the number of first conductive plates 6 is not limited to this. However, it is possible to have more. Further, in the above-described embodiment, the first conductive member and the second conductive member have a plate shape, but various shapes such as a round bar shape can be adopted. As described above, according to the first aspect of the present invention, the yoke and the magnetic pole teeth are insulated from the first and second conductive members by the mold of the insulating resin. It is possible to form a coil simply by joining the first conductive member and the second conductive member. Therefore, it is possible to wind a magnet wire or the like around the magnetic pole teeth, There is no need to attach an insulating material in the process, and therefore, there is an excellent effect that the manufacture of the stator is simplified and the structure is simplified. Further, an excellent effect that the space factor of the conductive member can be increased and the performance of the rotating electric machine can be improved can be achieved. In addition, there is an effect that the degree of freedom in designing the stator is increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a rotating electric machine stator according to an embodiment of the present invention. FIG. 2 is an enlarged view of a portion A in FIG. FIG. 3 is an exploded view as viewed from the arrow BB in FIG. 1; FIG. 4 is a sectional view taken along line CC of FIG. 2; FIG. 5 is a longitudinal sectional view of a conventional stator for a rotating electric machine. FIG. 6 is an enlarged view of a portion D in FIG. 5; FIG. 7 is a diagram illustrating an example of a conventional method of winding a magnet wire. [Description of Signs] 1 Stator for rotating electric machine 3 Yoke 4 Magnetic pole teeth 6 First conductive plate (conductive member) 7 Insulating resin 8 Slot conductive portions 10A, 10B Connecting conductive portion 11 Second conductive plate (conductive member) ) 12 Insulating resin 20 coil

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 15/12 H02K 15/12 E (72) Inventor Akihiro Watanabe 1-4-1, Chuo, Wako-shi, Saitama Honda Technical Research Institute F-term (reference) PC03 PE06 5H615 AA01 BB01 BB02 BB14 PP01 PP06 PP13 PP14 QQ02 QQ23 RR09 SS16 SS44 TT26

Claims (1)

Claims: 1. A stator for a rotating electrical machine, wherein a coil is attached to a plurality of radially inwardly protruding magnetic pole teeth arranged at intervals in a circumferential direction on an inner surface of an annular yoke. A plurality of first conductive members are arranged between adjacent magnetic pole teeth, and both end portions of the first conductive member are exposed to form a slot conductive portion molded with an insulating resin; and the magnetic pole teeth are interposed therebetween. A second connecting end of the first conductive member of the adjacent slot conductive portion is connectable.
A conductive member for connection formed by molding a conductive member with an insulating resin with both ends exposed, and an end of the first conductive member of the slot conductive portion and a second conductive member of the conductive member for connection. A stator for a rotating electrical machine, wherein the coil is formed by joining an end of a conductive member.