HK1112118B - Stator for rotary electric machines - Google Patents

Description

Stator for rotating electric machine

Technical Field

The present invention relates to a stator for a rotary electric machine.

Background

Fig. 13 of japanese patent laid-open No. 11-206057 shows a stator for a rotary electric machine, the stator including: a stator core including an annular yoke and a plurality of magnetic pole portions protruding from the annular yoke toward a center line of the yoke; a plurality of winding portions formed of winding conductors wound around the magnetic pole portions of the stator core; and a slot insulator (slot insulator) made of insulating resin and mounted on the stator core so as to provide electrical insulation between the stator core and the winding part. The slot insulator includes a plurality of connecting wire engaging hooks which are provided at and integrally formed with one end thereof and are provided at a certain interval in a circumferential direction thereof. The connection lines formed by the portions of the winding conductors extending from the winding portions are engaged with the plurality of connection line engaging hooks. The plurality of connecting wire engaging hooks are respectively formed to protrude toward the slot between the adjacent two of the plurality of magnetic pole portions. According to this arrangement, when the nozzle for winding the winding conductor is inserted into the slot between adjacent two of the plurality of magnetic pole portions so as to wind the winding conductor around the plurality of magnetic pole portions, the connecting wire engaging hook near the slot disturbs the operation of the nozzle, thereby restricting the movement of the nozzle. As a result, in the conventional arrangement, the increase in the volume occupied by the winding portion in the slot is restricted.

Fig. 1 of japanese patent laid-open No. 11-206057 shows a slot insulator including a plurality of wall portions for guiding a connection wire along an annular yoke, which are arranged at a certain interval in a circumferential direction of the yoke. On the outer wall portion of the wall portion, a plurality of protrusions protruding outward in the radial direction of the yoke are provided to prevent the connecting wire from falling off.

However, in the slot insulator configured as shown in fig. 1 of japanese patent laid-open No. 11-206057, the connection wire has to be arranged along the outer surfaces of the plurality of wall portions for guiding the connection wire. As a result, there are problems in that, when the wiring line is provided, the movement of the nozzle becomes complicated, and the connection line becomes considerably long.

Disclosure of Invention

Therefore, an object of the present invention is to provide a stator for a rotary electric machine in which the volume occupied by a winding portion can be increased and a connecting wire can be easily prevented from coming off.

Another object of the present invention is to provide a stator for a rotary electric machine, in which a circuit substrate is supported at one end of a slot insulator, and a distance between the circuit substrate and a stator core can be reduced.

A stator for a rotary electric machine to be improved in the present invention includes: a stator core including a plurality of magnetic pole portions that are provided integrally with a ring-shaped yoke, are provided on an inner circumferential portion of the ring-shaped yoke at a certain interval in a circumferential direction of the ring-shaped yoke, and protrude toward a center line of the ring-shaped yoke; a plurality of winding portions formed of winding conductors wound around the plurality of magnetic pole portions of the stator core, respectively; and a slot insulator made of an insulating resin, the slot insulator being mounted on the stator core so as to provide electrical insulation between the stator core and the winding portion.

The slot insulator includes a plurality of connecting wire engaging hooks at one end thereof located in one extending direction in which a center line of the annular yoke extends. The connection wire engagement hooks are formed integrally with the slot insulator and are provided on the one end of the slot insulator at a certain interval in a circumferential direction for engagement with connection wires formed of portions of the winding conductors extending from the winding portion. In the present invention, the plurality of connecting wire engaging hooks are respectively provided in the vicinity of boundary portions between the magnetic pole portions and the yoke, corresponding to the plurality of magnetic pole portions.

According to the present invention, the plurality of connecting wire engaging hooks are respectively provided in the vicinity of the boundary portions between the magnetic pole portions and the yoke, corresponding to the plurality of magnetic pole portions, and therefore, unlike the conventional arrangement: the connecting wire engaging hook is not disposed in the slot between the adjacent two magnetic pole portions. Therefore, when winding the winding conductor, the nozzle can be smoothly moved in the slot without being disturbed by the connecting wire engaging hook, and the volume occupied by the winding portion can be increased. In addition, since the plurality of connecting wire engaging hooks are respectively provided in the vicinity of the boundary portions between the plurality of magnetic pole portions and the yoke, the movement of the nozzle when forming the connecting wire can be simplified. As a result, a long connection line is not required, and the connection line can be easily provided.

A circuit substrate including a wiring pattern may be supported at the one end of the slot insulator, wherein the wiring pattern is electrically connected to the plurality of winding portions. The connector is mounted on a front surface of the circuit substrate, the front surface being located in the one extending direction. A plurality of terminal conductors of the connector penetrate the circuit substrate in a thickness direction and protrude toward the winding portion. Ends of the plurality of terminal conductors protruding from the circuit substrate are soldered and connected to electrodes provided on a rear surface of the circuit substrate, the rear surface being opposite to a front surface of the circuit substrate. In this case, it is preferable that the mounting position of the connector on the circuit substrate is determined so that all the ends of the plurality of terminal conductors can be located between adjacent two of the connecting wire engaging hooks.

The winding portion formed of a winding conductor wound around the magnetic pole portion is configured to protrude farthest in the one extending direction at an intermediate portion of the magnetic pole portion. Therefore, when all the ends of the plurality of terminal conductors are disposed between the adjacent two connecting wire engaging hooks, all the ends of the terminal conductors are disposed in the space formed between the adjacent two winding portions and spaced apart from the winding portions. This arrangement can prevent the plurality of terminal conductors from coming into contact with the winding portion even if the circuit substrate is provided in the vicinity of the stator core. As a result, the size of the stator for a rotary electric machine that supports the circuit substrate in the direction in which the center line extends can be reduced. Therefore, the motor can be made compact in size by reducing the size between the circuit substrate and the stator core.

Preferably, the slot insulator may include a cylindrical outer wall portion protruding in a direction in which the center line extends at one end thereof. In this case, the circuit substrate has a ring shape so as to be disposed inside the cylindrical outer wall portion. A plurality of connecting wire engaging hooks may be respectively formed inside the cylindrical outer wall portion and spaced apart from the cylindrical outer wall portion. With this arrangement, the cylindrical outer wall portion is located outside the connection line to protect the connection line. When the connection wires are arranged, the winding conductors are inserted only into spaces formed between the cylindrical outer wall portion and the plurality of connection wire engagement hooks. Thus, the arrangement or formation of the connection lines is simplified.

The outline shape of the cylindrical outer wall portion is arbitrary. For example, when the contour of the cylindrical outer wall portion is a regular polygon in shape, it is preferable that the plurality of connecting-wire engaging hooks be disposed respectively inside a plurality of corner portions of the regular polygon. Generally, a connector of a circuit substrate is formed along one side of a regular polygonal cylindrical outer wall portion. That is, the connector is formed at an intermediate position between adjacent two corner portions of the regular polygonal cylindrical outer wall portion. With this arrangement, when the plurality of connecting wire engaging hooks are respectively disposed inside the plurality of corner portions of the regular polygonal cylindrical outer wall portion, all the end portions of the plurality of terminal conductors of the connector protruding from the circuit substrate are arranged in the space formed between the adjacent two winding portions. As a result, the circuit substrate can be disposed closer to the stator core, and the distance between the circuit substrate and the stator core can be reduced.

A plurality of through holes may be formed in the circuit substrate, penetrate the circuit substrate in a thickness direction thereof, and are fitted with end portions of the plurality of connecting wire engaging hooks. When the end portions of the plurality of connection wire engagement hooks are fitted into the plurality of through holes, respectively, the circuit substrate can be disposed closer to the winding portion even if the plurality of connection wire engagement hooks are disposed. In addition, the plurality of connecting wire engaging hooks have a function of guiding the circuit substrate at the time of assembly, and also function to prevent the circuit substrate from moving or rotating in the circumferential direction.

Preferably, the plurality of through holes each have an opening that opens in a radially outward direction as viewed from the centerline. With this arrangement, the plurality of connecting wire engaging hooks can be easily fitted into the plurality of through holes.

According to the present invention, the plurality of connecting wire engaging hooks are respectively provided in the vicinity of the boundary portion between the magnetic pole portion and the yoke, corresponding to the plurality of magnetic pole portions. As a result, when winding the winding conductor, the nozzle can be smoothly moved in the slot without being disturbed by the connecting wire engaging hook, and the volume occupied by the winding portion can be increased. In addition, since the plurality of connecting wire engaging hooks are respectively provided in the vicinity of the boundary portions between the plurality of magnetic pole portions and the yoke, the movement of the nozzle at the time of forming the connecting wire can be simplified. Therefore, a long connection line is not required, and the connection line can be easily simplified.

Drawings

Fig. 1 is a plan view of a stator for a rotary electric machine of one embodiment of the present invention.

Fig. 2 is a back view of the stator for a rotary electric machine of the embodiment of the present invention.

Fig. 3 is an explanatory view showing the stator of fig. 1, in which a winding portion is omitted;

fig. 4 is a sectional view taken along line IV-IV of fig. 3.

Fig. 5 is a cross-sectional view taken along line V-V.

Detailed Description

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 and 2 are a plan view and a back view, respectively, of a stator for a rotary electric machine according to an embodiment of the present invention. Fig. 3 is an explanatory view showing the stator of fig. 1, in which a winding portion 3 described later is omitted. Fig. 4 is a sectional view taken along line IV-IV of fig. 3. As shown in each figure, the stator for a rotary electric machine of the present embodiment includes: a stator core 1; 8 winding portions 3; a slot insulator 5; and a circuit substrate 7. The stator core 1 includes an annular yoke 9 and 8 magnetic pole portions 11. The 8 magnetic pole portions 11 are provided integrally with the annular yoke 9 on an inner circumferential portion of the annular yoke 9 with a certain interval in the circumferential direction of the annular yoke 9, and protrude toward the center line C of the annular yoke 9. The stator core 1 is formed by stacking a plurality of magnetic steel plates of the same shape in a direction in which the center line C extends. The 8 winding portions 3 are respectively formed by winding conductors wound around the magnetic pole portions 11 of the stator core 1. A slot insulator 5 made of insulating resin is mounted on the stator core 1 to provide electrical insulation between the stator core 1 and the winding portion 3. The slot insulator 5 includes a pair of insulator segments 13 and 15, and the insulator segments 13 and 15 are fitted with the stator core 1 from both sides of the stator core 1 in a direction in which the center line C extends.

As shown in fig. 3 and 4, the insulator divided portion 13 is one of a pair of insulator divided portions 13 and 15, which is made of synthetic resin, and integrally includes: a base portion 17 covering the inner circumferential surface of the yoke 9; a cylindrical outer wall portion 19 having a regular octagonal shape with a contour protruding in a direction in which the center line C extends; 8 bobbin portions (bobbin sections) 21, the 8 bobbin portions 21 covering surfaces of the pole portions 11 except for pole surfaces thereof; and 8 string engaging hooks 23. The other of the pair of insulator split portions 13 and 15, i.e., the insulator split portion 15, has substantially the same structure as the insulator split portion 13.

The regular octagonal cylindrical outer wall portion 19 is arranged such that boundary portions between the yoke 9 and the 8 magnetic pole portions 11 of the stator core 1 can be located in corner portions of the regular octagon, respectively.

The 8 connection wire engagement hooks 23 are elongated-shaped rods having a pentagonal cross section, and are engaged with connection wires formed of portions of winding conductors extending from the winding portion 3. 8 connecting wire engaging hooks are formed at one end of the slot insulator 5, which is located in one extending direction in which the center line C of the annular yoke 9 extends, and the 8 connecting wire engaging hooks are disposed at equal intervals in the circumferential direction of the inner circumferential portion of the yoke 9. Therefore, the 8 connecting wire engaging hooks are arranged such that the 8 connecting wire engaging hooks are respectively disposed in corner portions of an imaginary regular octagon. The 8 connecting wire engaging hooks 23 are respectively provided in the vicinity of the boundary portions between the 8 magnetic pole portions 11 and the yoke 9, corresponding to the 8 magnetic pole portions 11. The connecting wire engaging hooks project from the 8 bobbin portions 21 in the one extending direction in which the center line C extends. Therefore, the 8 connecting wire engagement hooks 23 are respectively provided inside the 8 corner portions of the regular octagonal cylindrical outer wall portion 19 and spaced from the cylindrical outer wall portion 19.

As shown in fig. 2, the circuit substrate 7 includes an electrically insulating plate 25, wiring patterns 27 provided on the electrically insulating plate 25 and electrically connected to the 8 winding portions 3, and a connector 29 mounted on one surface of the circuit substrate 7. The electrically insulating plate 25 has a ring shape, an outer circumference of which is almost octagonal, and an inner circumference of which is circular. In the corner portions of the octagon, 8 through holes 25a are respectively formed which penetrate the insulating plate 25 in the thickness direction and respectively have openings which open in the radially outward direction as viewed from the center line C. The circuit substrate 7 is disposed inside the cylindrical outer wall portion 19 of the other insulator divided portion 15 so that the end portions of the 8 connecting wire engaging hooks 23 of the insulator divided portion 15 can be fitted into the 8 through holes 25a, respectively.

The connector 29 is formed along one side of the regular octagonal cylindrical outer wall portion 19. That is, the connector 29 is formed at an intermediate position between adjacent two corner portions of the regular octagonal cylindrical outer wall portion 19. Fig. 5 is a partial sectional view taken along line V-V of fig. 2. As shown, the connector 29 has a plurality of terminal conductors 31. The plurality of terminal conductors 31 pass through the circuit substrate 7 in the thickness direction of the circuit substrate 7 and protrude toward the winding portion 3. End portions 31a of a plurality of terminal conductors 31 protruding from the circuit substrate 7 are soldered and connected to electrodes provided on a rear surface of the circuit substrate 7, the rear surface being opposite to the front surface of the circuit substrate 7. As mentioned above, since the connector 29 is formed between the adjacent two corner portions of the regular octagonal cylindrical outer wall portion 19, the mounting position of the connector 29 on the circuit substrate 7 is determined so that all the end portions 31a of the plurality of terminal conductors 31 can be located between the adjacent two connection wire engagement hooks 23. Therefore, all the end portions 31a of the plurality of terminal conductors 31 are located between the adjacent two winding portions 3 and are spaced apart from the winding portions 3.

In the stator for a rotary electric machine of the present embodiment, 8 connecting wire engagement hooks 23 are provided so as to correspond to 8 magnetic pole portions 11, respectively. As a result, in forming the winding portion 3 by winding the winding conductor, the nozzle can be smoothly moved within the slot without being disturbed by the connecting wire engaging hook 23, and thus the volume occupied by the winding portion 3 can be increased. Since the 8 connecting wire engagement hooks 23 are provided in the vicinity of the boundary portions between the magnetic pole portions 11 and the yoke 9, respectively, the connecting wire engagement hooks 23 can be formed into a desired shape and size. Thus, the patch cord engagement hook 23 that allows the patch cord to be easily engaged therewith can be obtained.

In addition, in the stator for a rotary electric machine of the present embodiment, as shown in fig. 5, since the end portions 31a of the plurality of terminal conductors 31 are provided in the space formed between the adjacent two winding portions 3, the end portions 31a of the plurality of terminal conductors 31 may be provided at positions slightly protruding in the direction in which the winding portions 3 extend along the center line C, and may be spaced apart from the winding portions 3. That is, the end portions 31a of the plurality of terminal conductors 31 may be disposed at positions distant from the portion P where the winding portion 3 protrudes farthest in the direction in which the center line C extends. Therefore, as shown by the dotted line, the end 31a can be disposed closer to the length L of the stator core 1 than a conventional stator in which the end 31a 'of the plurality of terminal conductors 31' is used. As a result, the stator for the rotary electric machine can be compact in size.

The present invention is not limited to the above-described embodiments. Various changes and modifications can be made without departing from the scope of the invention.

Claims (3)

1. A stator for a rotary electric machine, comprising:

a stator core including a plurality of magnetic pole portions that are provided integrally with the annular yoke, are provided on an inner circumferential portion of the annular yoke at a certain interval in a circumferential direction of the annular yoke, and protrude toward a center line of the annular yoke,

a plurality of winding portions formed of winding conductors wound around the plurality of magnetic pole portions of the stator core, respectively, an

A slot insulator made of an insulating resin, the slot insulator being mounted on the stator core so as to provide electrical insulation between the stator core and the winding portion,

the slot insulator includes a plurality of connection wire engagement hooks at one end thereof in one extending direction in which a center line of the annular yoke extends, the connection wire engagement hooks being formed integrally with the slot insulator and being provided on the one end of the slot insulator at a certain interval in a circumferential direction for engagement with connection wires formed of portions of the winding conductors extending from the winding portions,

the plurality of connecting wire engaging hooks are respectively provided in the vicinity of boundary portions between the magnetic pole portions and the yoke, corresponding to the plurality of magnetic pole portions,

the one end of the slot insulator includes a cylindrical outer wall portion protruding in the one extending direction,

the plurality of connecting wire engaging hooks are formed at the inner side of the cylindrical outer wall portion, respectively, and are spaced apart from the cylindrical outer wall portion, wherein

A circuit substrate including a wiring pattern electrically connected to the plurality of winding portions is supported at the one end of the slot insulator;

a connector mounted on a front surface of the circuit substrate, the front surface being located in the one extending direction;

a plurality of terminal conductors of the connector penetrate the circuit substrate in a thickness direction of the circuit substrate and protrude toward the winding portion;

ends of the plurality of terminal conductors protruding from the circuit substrate are soldered and connected to electrodes provided on a rear surface of the circuit substrate, the rear surface being opposite to a front surface of the circuit substrate;

a mounting position of the connector on the circuit substrate is determined such that all end portions of the plurality of terminal conductors can be located between adjacent two of the connecting wire engaging hooks;

a plurality of through holes are formed in the circuit substrate, the plurality of through holes penetrating the circuit substrate in a thickness direction and fitted with end portions of the plurality of connecting wire engaging hooks; and

the circuit substrate is supported at the one end of the slot insulator with the end portions of the plurality of connecting wire engaging hooks fitted into the plurality of through holes.

2. The stator for a rotary electric machine according to claim 1, wherein

The outline of the cylindrical outer wall portion is a regular polygon in shape;

the circuit substrate is disposed inside the cylindrical outer wall portion and has an annular shape; and

the plurality of connecting wire engaging hooks are respectively disposed inside a plurality of corner portions of the cylindrical outer wall portion.

3. The stator for a rotary electric machine according to claim 1, wherein the plurality of through holes each have an opening that opens in a radially outward direction as viewed from the center line.