WO2017006822A1

WO2017006822A1 - Electric motor and method for winding electric motor

Info

Publication number: WO2017006822A1
Application number: PCT/JP2016/069251
Authority: WO
Inventors: 義親川島; 裕美子木村; 田中　秀典; 夏海田村
Original assignee: 株式会社ミツバ
Priority date: 2015-07-03
Filing date: 2016-06-29
Publication date: 2017-01-12
Also published as: JPWO2017006822A1; JP6595594B2

Abstract

An electric motor (1) is provided with an 8-phase structure comprising 6 poles, 8 slots, and 32 segments. A predetermined winding (38) is wound between predetermined segments (41), and a first armature coil (71) and a second armature coil are formed.

Description

Electric motor and winding method of electric motor

The present invention relates to an electric motor and an electric motor winding method.
This application claims priority based on Japanese Patent Application No. 2015-134096 filed in Japan on July 3, 2015, the contents of which are incorporated herein by reference.

There is a so-called brushed DC motor as an electric motor. This type of electric motor includes a yoke provided with a permanent magnet having a plurality of magnetic poles, a rotary shaft rotatably provided inside the yoke in the radial direction, and a radial shape attached to the rotary shaft along the radial direction. An armature core having a plurality of teeth extending to each other, a plurality of slots formed between the teeth, a winding wound around each tooth, and a plurality of segments provided adjacent to the armature core on a rotation shaft. A commutator arranged in the circumferential direction and a brush for supplying power to the winding through the segment are provided. A riser is formed in the segment, and the segment and the winding are connected via the riser.

Here, various techniques for improving the motor capacity and reducing the manufacturing cost have been proposed.
For example, the number of magnetic poles is set to 6 poles, the number of slots is set to 8 and the number of segments is set to 24. The windings are wound around each tooth by a general concentrated winding method. A technique of connecting by pressure lines is disclosed. As a result, the copper capacity of the winding is reduced to improve the motor capacity. In addition, when a current is supplied to one segment by using a short-circuit wire, a current is also supplied to a segment having the same potential, so that the number of brushes can be reduced (for example, see Patent Document 1).

JP 2003-259582 A

By the way, when the winding is wound around each tooth by a general concentrated winding method, the number of phases (the number of segments per pole pair) is determined, so there is a limit in reducing the voltage between the segments, There was a limit to extending the life of the brush.

Here, in the above-described embodiment, the number of segments per pole pair is 8, and there is a limit to the voltage reduction between the segments, and it is difficult to meet the demand for further extending the life of the brush. In order to increase the number of segments in order to extend the life of the brush, it is necessary to change the number of magnetic poles and the number of slots so as to correspond to this, and the size of the electric motor is increased.
In addition, since the short-circuit wire is used, the amount of copper is increased by this amount, and further, the winding work takes time, resulting in an increase in manufacturing cost.

In recent years, there is a high demand for further miniaturization of electric motors. If the electric motor is forcibly reduced in size, the segment riser and the winding interfere with each other, and the winding may be damaged.

The present invention provides an electric motor and a winding method of the electric motor that can further extend the life of the brush without increasing the physique and can suppress an increase in manufacturing cost.
It is another object of the present invention to provide an electric motor and an electric motor winding method that can reliably prevent damage to the winding while reducing the size.

According to the first aspect of the present invention, the electric motor includes a yoke provided with a permanent magnet having six magnetic poles, a rotary shaft rotatably provided inside the yoke in the radial direction, and the rotation An armature core having eight teeth attached to the shaft and extending radially along the radial direction, and eight slots formed between the teeth; a winding wound around each of the teeth; and An electric motor comprising: a commutator provided adjacent to an armature core and having 32 segments arranged in the circumferential direction; and a brush for supplying power to the windings via the segments. The teeth are numbered in order along the circumferential direction, and further, the 32 segments are numbered in order along the circumferential direction, and N is a natural number. And a terminal portion of the winding wound in the forward direction 2N times between the first tooth and the first segment, and the first segment and the 12th segment. The terminal portion of the winding wound in the forward direction is connected to the No. 1 tooth between the No. 12 segment and the No. 23 segment. The coil is wound N times in the reverse direction, and the end of the coil wound N times in the reverse direction is connected to the No. 8 tooth, and the No. 23 segment and the No. 2 segment are connected. Between the segments, the end of the winding wound N times around the teeth No. 5 and N times around the teeth No. 8 is connected in the reverse direction, Between the second segment and the thirteenth segment, the fourth tee The end of the winding wound in the forward direction 2N times is connected to the tooth, and between the 13th segment and the 24th segment, the 4th tooth is 2N times in the forward direction. The wound end portion of the winding is connected, and between the 24th segment and the 3rd segment, the 8th tooth is wound N times in the reverse direction and the 3rd segment The end of the winding wound in the reverse direction N times is connected to the teeth of No. 3, and the reverse of N times of the teeth No. 8 is reversed between the No. 3 segment and the No. 14 segment. And the end of the winding wound in the opposite direction N times to the third tooth, and connected between the 14th segment and the 25th segment, The end of the winding wound in the forward direction 2N times on the No. 7 tooth is in contact with And the end of the winding wound in the forward direction 2N times on the 7th tooth is connected between the 25th segment and the 4th segment, and the 4th segment. And the 15th segment are wound N times on the 3rd tooth in the reverse direction, and N ends on the 6th tooth in the reverse direction. Between the segment No. 15 and the segment No. 26 and wound N times around the teeth No. 3 and in the opposite direction N times around the No. 6 teeth. The winding is wound in the forward direction 2N times on the second tooth between the 26th segment and the 5th segment. Are connected, and the segment No. 5 and the segment No. 16 The terminal portion of the winding wound in the forward direction 2N times is connected to the tooth No. 2 between the No. 16 segment and the No. 27 segment. The coil is wound N times in the reverse direction, and the end of the winding wound N times in the reverse direction is connected to the first tooth, and the segment No. 27 and the No. 6 Between the segment, the end of the winding wound N times around the No. 6 tooth in the reverse direction is connected to the No. 6 tooth. A first armature coil is formed, and a second armature coil is formed so as to be point symmetric about the first armature coil and the rotation axis.

With this configuration, the number of segments can be 32 while the number of magnetic poles is 6 and the number of slots is 8. For this reason, the voltage between segments can be reduced and the life of the brush can be further extended without increasing the size of the electric motor.
Further, the number of brushes can be reduced without using a short-circuit wire as in the prior art. For this reason, the manufacturing cost of an electric motor can be reduced.

According to the second aspect of the present invention, the electric motor includes a yoke provided with a permanent magnet having six magnetic poles, a rotary shaft rotatably provided on a radially inner side of the yoke, and the rotation An armature core having eight teeth attached to the shaft and extending radially along the radial direction, and eight slots formed between the teeth; a winding wound around each of the teeth; and An electric motor comprising: a commutator provided adjacent to an armature core and having 32 segments arranged in the circumferential direction; and a brush for supplying power to the windings via the segments. When teeth are sequentially numbered along the circumferential direction, and further, the 32 segments are numbered sequentially along the circumferential direction, the 22nd segment and the 1st front Between the segment, the No. 1 tooth was wound in the forward direction a predetermined number of times, and was inserted once through the other slots except the slots located on both sides in the circumferential direction of the No. 1 tooth. The end of the winding is connected, and the end of the winding wound in the forward direction on the first tooth is connected between the first segment and the 12th segment. Between the segment No. 12 and the segment No. 23, the No. 5 tooth is wound a predetermined number of times, and the No. 8 tooth is wound a predetermined number of times in the opposite direction, and the No. 5 segment A terminal portion of the winding wound in the forward direction once is connected to the other teeth excluding the teeth and the No. 8 tooth, and is connected between the No. 23 segment and the No. 2 segment. And to the 5th tooth The end portion of the winding wound in the reverse direction and a predetermined number of turns is connected to the No. 8 tooth, and the No. 2 segment and the No. 13 segment are connected. The winding No. 4 was wound in the forward direction a predetermined number of times and inserted once in the other slots except for the slots located on both sides in the circumferential direction of the No. 4 tooth. And the terminal portion of the winding wound in the forward direction a predetermined number of times on the teeth of No. 4 is connected between the segment of No. 13 and the segment of No. 24. No. 8 segment and No. 14 segment are wound in the opposite direction, respectively, around the No. 8 tooth and the No. 3 tooth, respectively. Before the other, excluding the third tooth The end portion of the winding wound in the forward direction once is connected to the tooth, and a predetermined number of times on the tooth No. 8 between the segment No. 3 and the segment No. 14 and 3 No. 8 of the teeth and No. 3 of the teeth and the other of the teeth except for the slots of the No. 3 teeth are inserted once in the opposite direction. The end of the winding is connected, between the 14th segment and the 25th segment, wound around the 7th tooth in the forward direction, and in the circumferential direction of the 7th tooth. Ends of the windings inserted once into the other slots excluding the slots located on both sides are connected, and the 7th teeth are connected between the 25th segment and the 4th segment. Predetermined times in the forward direction The ends of the wound windings are connected, and between the fourth segment and the fifteenth segment, the third tooth is predetermined and the sixth tooth is predetermined, respectively. The end of the winding wound in the forward direction is connected to the other teeth except for the third tooth and the sixth tooth, and connected to the 15th tooth. Between the segment and the No. 26 segment, the No. 3 tooth is wound in the opposite direction, and the No. 6 tooth is wound in the opposite direction, respectively, and the No. 3 tooth and No. 6 No. 26 segment and No. 5 segment are connected to the ends of the windings inserted once into the other slots except for the slots located on both circumferential sides of any one of the teeth Between A terminal portion of the winding wound in the forward direction a predetermined number of times on the No. 2 tooth; and the commutator of the armature core between the No. 5 segment and the No. 16 segment. Is connected to the end portion of the winding wound on the opposite side, and is wound around the 6th tooth a predetermined number of times in the reverse direction between the 16th segment and the 27th segment. In addition, the winding wound around the No. 1 tooth in the reverse direction a predetermined number of times and once around the No. 6 tooth and the other teeth except the No. 1 tooth in the forward direction. The end of the wire is connected, and between the 27th segment and the 6th segment, the 6th tooth is wound a predetermined number of times in the reverse direction and the 1st tooth is a predetermined number of times. The end of the winding wound in the opposite direction A terminal arm is connected to form a first armature coil, and a second armature coil is formed so as to be point-symmetric about the first armature coil and the rotation axis.

In this case, as in the third aspect of the present invention, between the 22nd segment and the 1st segment, the 1st tooth is wound a predetermined number of times in the forward direction, and the 6th segment. A terminal portion of the winding inserted once in the slot between the teeth and the 7th tooth is connected, and between the 12th segment and the 23rd segment, the 5th A predetermined number of times is wound around the teeth and a predetermined number of times around the teeth No. 8 and the end portions of the windings wound around the No. 4 teeth once in the forward direction are connected. Between the second segment and the thirteenth segment, the fourth tooth is wound a predetermined number of times in the forward direction, and the first and second teeth are between the first and second teeth. The end portion of the winding inserted once in the slot is It is continuously wound around the No. 24 segment and the No. 14 segment on the No. 8 tooth, and on the No. 3 tooth for a predetermined number of times, and in the opposite direction. A terminal portion of the winding wound in the forward direction once is connected to the teeth of No. 8, and a predetermined number of times to the teeth of No. 8 between the No. 3 segment and the No. 14 segment; and The end of the winding connected once to the slot between the 4th tooth and the 5th tooth is connected to the third tooth and wound in the reverse direction a predetermined number of times. Between the 14th segment and the 25th segment, the slot between the 4th tooth and the 5th tooth, the 7th tooth and the 8th tooth. Between said slot and The end portions of the passed windings are connected, and between the fourth segment and the fifteenth segment, the third tooth is predetermined and the sixth tooth is predetermined, respectively. And the end portion of the winding wound in the forward direction once on the second tooth, and connected between the 15th segment and the 26th segment, It is wound around the third tooth and a predetermined number of times and a predetermined number of times around the sixth tooth, and is inserted once into the slot between the seventh tooth and the eighth tooth. The end portions of the wound windings are connected, and between the 5th segment and the 16th segment, the slot between the 1st tooth and the 2nd tooth, and the 4th The teeth and No. 5 teeth The end portion of the winding inserted into the slot between is connected to the No. 16 segment and the No. 27 segment, and the No. 6 tooth is wound a predetermined number of times in the reverse direction. Even if the end portion of the winding wound in the reverse direction is wound around the No. 1 tooth, and the winding is wound around the No. 5 tooth once in the forward direction. Good.

This configuration can suppress the winding of the winding between the armature core and the commutator. For this reason, it is possible to prevent the riser of the segment from interfering with the winding while reducing the size of the electric motor, and it is possible to reliably prevent the winding from being damaged.

According to the fourth aspect of the present invention, the winding method of the electric motor includes a yoke provided with a permanent magnet having six magnetic poles, and a rotary shaft rotatably provided inside the yoke in the radial direction. An armature core having eight teeth attached to the rotating shaft and extending radially along the radial direction, and eight slots formed between the teeth; a winding wound around each of the teeth; Winding of an electric motor comprising: a commutator provided on a rotating shaft adjacent to the armature core and having 32 segments arranged in the circumferential direction; and a brush for supplying power to the winding through the segments In the method, the eight teeth are sequentially numbered along the circumferential direction, and further, the 32 segments are numbered sequentially along the circumferential direction, and N is a natural number. The winding start end of the winding is connected to the segment No. 22, and then the winding is wound in the forward direction 2N times on the No. 1 tooth, and then the winding on the No. 1 segment. After that, the winding was wound in the forward direction 2N times on the No. 1 tooth, and then the winding was connected to the No. 12 segment, and then the No. 5 tooth was wound. After winding the wire N times in the reverse direction, wind the winding N times in the reverse direction, and then connect the winding to the 23rd segment, and then After winding the coil N times in the reverse direction, the coil N is wound N times in the reverse direction, and the coil is connected to the second segment. Then, after winding the winding 2N times around the fourth tooth in the forward direction, Connecting the winding to the segment of No., and then winding the winding to the teeth of No. 4N in the forward direction, and then connecting the winding to the segment of No. 24; After winding the winding around the No. 8 tooth N times in the reverse direction, winding the winding around the No. 3 tooth N times in the reverse direction and further winding the winding around the No. 3 segment After that, the winding was wound N times on the teeth No. 8 in the reverse direction, and then the winding was wound N times on the teeth No. 3 in the reverse direction. The winding is connected to the segment, and then the winding is wound 2N times on the 7th tooth in the forward direction, and then the winding is connected to the 25th segment. After winding the winding 2N times forward on the teeth of No. 4, the segment No. 4 The winding is then connected to the third tooth, and the winding is wound N times in the reverse direction, and then the winding is wound N number in the sixth tooth in the reverse direction. Further, the winding is connected to the 15th segment, and then the winding is wound N times on the third tooth in the reverse direction, and then the winding is wound N times on the 6th tooth. Then, the winding is connected to the 26th segment, and then the winding is wound 2N times in the forward direction on the second tooth, and then the fifth segment. The winding is connected to the second tooth, and then the winding is wound in the forward direction 2N times, and then the winding is connected to the 16th segment. After winding the winding N times on the teeth and in the reverse direction, winding the winding N times on the first tooth, Then, the winding is connected to the No. 27 segment, and then the winding is wound N times on the No. 6 tooth in the opposite direction, and then the No. 1 tooth is The winding is wound N times in the reverse direction, and the winding end of the winding is connected to the No. 6 segment to form a first armature coil, and the first armature coil and the rotating shaft are centered. Thus, the second armature coil was formed so as to be point-symmetric.

By adopting such a winding method, the first armature coil and the second armature coil can be formed in series. For this reason, the winding work efficiency can be improved, and the manufacturing cost of the electric motor can be further reduced.

According to the fifth aspect of the present invention, the winding method of the electric motor includes a yoke provided with a permanent magnet having six magnetic poles, and a rotary shaft provided rotatably in the radial direction of the yoke. An armature core having eight teeth attached to the rotating shaft and extending radially along the radial direction, and eight slots formed between the teeth; a winding wound around each of the teeth; Winding of an electric motor comprising: a commutator provided on a rotating shaft adjacent to the armature core and having 32 segments arranged in the circumferential direction; and a brush for supplying power to the winding through the segments In the method, the eight teeth are sequentially numbered along the circumferential direction, and the 32 segments are numbered sequentially along the circumferential direction. The winding start end of the winding is connected to the thread, and then the winding is inserted into the slot between the 6th tooth and the 7th tooth, and then to the 1st tooth. After winding the winding a predetermined number of times in the forward direction, the winding is inserted into the slot between the third tooth and the fourth tooth, and then wound around the twelfth segment. After the wire is connected, the winding is wound around the 4th tooth once, and then the winding is wound around the 5th tooth in the reverse direction, and then the 8th tooth. The winding is wound in a reverse direction a predetermined number of times, and the winding is inserted into the slot between the 6th tooth and the 7th tooth, and then into the 23rd segment. After connecting the windings, before the

teeth

6 and 7 The winding is inserted into the slot between the teeth, and then the winding is wound around the fifth tooth in the reverse direction for a predetermined number of times, and then the winding is predetermined on the eighth tooth. Winding in the reverse direction, and then inserting the winding into the slot between the first tooth and the second tooth, and connecting the winding to the second segment, Thereafter, the winding is inserted into the slot between the first tooth and the second tooth, and the winding is wound around the fourth tooth a predetermined number of times in the forward direction. The winding is connected to the segment of the number No., and then the winding is wound around the No. 4 tooth in the forward direction, and then between the No. 6 teeth and the No. 7 teeth. The winding is inserted into the slot, and then the segment No. 24 After the winding is connected to the tooth No. 7, the winding is wound once around the No. 7 tooth, and then the winding is wound around the No. 8 tooth a predetermined number of times in the reverse direction. The winding is wound around the tooth of the number predetermined times in the reverse direction, and then the winding is inserted into the slot between the first tooth and the second tooth. The winding is connected to the segment, and then the winding is inserted into the slot between the first tooth and the second tooth, and then the winding is connected to the eighth tooth. After winding in the reverse direction a predetermined number of times, winding the winding around the third tooth in the reverse direction a predetermined number of times, and then into the slot between the fourth tooth and the fifth tooth. , After inserting the winding, connect the winding to the 14th segment, After, the winding is inserted into the slot between the 4th tooth and the 5th tooth, and the winding is wound around the 7th tooth in the forward direction. The winding is connected to the 25th segment, and then the winding is wound around the 7th tooth in the forward direction, and then between the 1st tooth and the 2nd tooth. The winding is inserted into the slot, and then the winding is connected to the fourth segment, and then the winding is wound around the second tooth, and then the third winding. After winding the winding around the teeth a predetermined number of times in the reverse direction, winding the winding around the No. 6 teeth a predetermined number of times in the reverse direction, and thereafter, the No. 4 teeth and the No. 5 teeth After inserting the winding into the slot between, the 15th segment The winding is connected, and then the winding is inserted into the slot between the fourth tooth and the fifth tooth, and then the winding is passed through the third tooth a predetermined number of times. After winding in the reverse direction, the winding is wound around the 6th tooth in the reverse direction a predetermined number of times, and then the winding is placed in the slot between the 4th tooth and the 5th tooth. After the wire is inserted, the winding is connected to the 26th segment, and then the winding is inserted into the slot between the 7th tooth and the 8th tooth. After winding the winding around the teeth of the number in the forward direction, connect the windings to the segment of the number 5, and then between the

teeth

1 and 2 Between the slot, the 4th tooth and the 5th tooth. The windings are inserted into the slots, respectively, and the windings are connected to the 16th segment, and then the windings are wound once around the 5th tooth, and then the 6th winding. After winding the winding around the teeth a predetermined number of times in the reverse direction, winding the winding around the first tooth a predetermined number of times in the reverse direction, and then after the No. 7 teeth and the No. 8 teeth After inserting the winding into the slot between, connect the winding to the segment of No. 27, and then into the slot between the teeth of No. 7 and the teeth of No. 8, The winding is inserted, and then the winding is wound around the No. 6 tooth in the reverse direction for a predetermined time, and then the winding is wound around the No. 1 tooth in the reverse direction for a predetermined time. The slot between the second tooth and the third tooth In addition, after the winding is inserted, the winding end of the winding is connected to the sixth segment to form a first armature coil, which is point-symmetric about the first armature coil and the rotation axis. The 2nd armature coil was formed so that it might become.

巻線 By using such a winding method, it is possible to suppress the winding of the winding between the armature core and the commutator. For this reason, it is possible to prevent the riser of the segment from interfering with the winding while reducing the size of the electric motor, and it is possible to reliably prevent the winding from being damaged.

According to the electric motor and the winding method of the electric motor described above, the number of segments can be 32 while the number of magnetic poles is 6 and the number of slots is 8. For this reason, the voltage between segments can be reduced and the life of the brush can be further extended without increasing the size of the electric motor.
Further, the number of brushes can be reduced without using a short-circuit wire as in the prior art. For this reason, the manufacturing cost of an electric motor can be reduced.
Further, it is possible to suppress the winding of the winding between the armature core and the commutator. For this reason, it is possible to prevent the riser of the segment from interfering with the winding while reducing the size of the electric motor, and it is possible to reliably prevent the winding from being damaged.

It is a longitudinal cross-sectional view which shows the structure of the electric motor in 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, omitting the illustration of the armature coil in the first embodiment of the present invention. It is an expanded view of the armature in 1st Embodiment of this invention. It is an expanded view of the armature in 1st Embodiment of this invention. It is an expanded view of the armature in 2nd Embodiment of this invention. It is an expanded view of the armature in 2nd Embodiment of this invention. It is explanatory drawing which shows the winding procedure of the coil | winding in 2nd Embodiment of this invention.

Next, an embodiment of the present invention will be described based on the drawings.

(Electric motor)
FIG. 1 is a longitudinal sectional view showing the configuration of the electric motor 1, and FIG. 2 is a sectional view taken along the line AA in FIG. 1, and the illustration of the armature coil 7 is omitted.
As shown in FIGS. 1 and 2, the electric motor 1 is a so-called DC brush motor, and is used, for example, as a fan motor for cooling an automobile radiator. The electric motor 1 includes an armature 3 that is rotatably provided in a bottomed cylindrical yoke 2 and covers an opening 2 c of the yoke 2 with an end bracket 17. And the electric motor 1 is attached to the radiator of the motor vehicle with the rotating shaft 5 of the armature 3 along the horizontal direction.

(yoke)
Six tile-shaped permanent magnets 4 are arranged on the inner surface of the peripheral wall 2a of the yoke 2 along the circumferential direction. These permanent magnets 4 are arranged so that the magnetic poles are in order along the circumferential direction.
In addition, a concave portion 10 is formed in the end portion (bottom portion) 2b of the yoke 2 at a substantially radial center. A boss portion 10 a that protrudes outward in the axial direction is formed in the majority of the recess 10. The boss portion 10a is formed with an insertion hole 11 through which one end (the left end in FIG. 1) of the rotary shaft 5 of the armature 3 is inserted, and for rotatably supporting one end side of the rotary shaft 5. The bearing 12 is fitted inside.

(Armature)
The armature 3 includes an armature core 6 that is externally fitted and fixed to the rotary shaft 5, an armature coil 7 that is wound around the armature core 6, and a commutator 13 that is disposed on the other end side (right side in FIG. 1) of the rotary shaft 5. And is constituted by.
As shown in detail in FIG. 2, the armature core 6 is formed by laminating a plurality of metal plates in the axial direction or pressure-molding soft magnetic powder. The armature core 6 has a substantially annular rotary shaft fixing portion 61 that is fitted and fixed to the rotary shaft 5. The rotary shaft 5 is press-fitted and fixed in an insertion hole 61 a formed in the rotary shaft fixing portion 61.

An outer annular portion 62 formed concentrically with the rotating shaft fixing portion 61 is provided on the outer side in the radial direction of the rotating shaft fixing portion 61. Between the rotary shaft fixing portion 61 and the outer annular portion 62, a plurality of spoke portions 63 are provided at equal intervals in the circumferential direction across the both 61 and 62 (for example, 10 in this embodiment). Is provided. In other words, the armature core 6 includes a plurality of through holes 64 that penetrate in the axial direction and are substantially fan-shaped in a plan view in the axial direction by the rotating shaft fixing portion 61, the outer annular portion 62, and the spoke portion 63 (for example, in the present embodiment 10). The outer annular portion 62 is formed thicker than the rotating shaft fixing portion 61 and the spoke portion 63.

On the outer side in the radial direction of the outer annular portion 62, eight teeth 36 having a substantially T shape in a plan view in the axial direction are radially formed at equal intervals along the circumferential direction. Between adjacent teeth 36, a dovetail slot 37 is formed. The slots 37 extend along the axial direction, and eight slots 37 are formed at equal intervals along the circumferential direction. An enamel-coated winding 38 (see FIG. 3) is passed through the slot 37, and the winding 38 is wound from above an insulator (not shown) attached to the tooth 36. As a result, a plurality of armature coils 7 are formed on the outer periphery of the armature core 6. Details of the winding method of the winding 38 will be described later.

As shown in detail in FIG. 1, the commutator 13 disposed on the other end side of the rotary shaft 5 includes a resin mold body 40 that is externally fixed to the rotary shaft 5 and formed in a columnar shape, and the resin mold body 40. And a plurality of segments 41 exposed and disposed on the outer peripheral surface. The segments 41 are formed by plate-like metal pieces that are long in the axial direction, and are fixed in parallel at equal intervals along the circumferential direction in a state of being insulated from each other.

Here, in the present embodiment, the number of segments 41 is set to 32. That is, the electric motor 1 is a so-called 6-pole 8-slot 32-segment DC motor having 6 permanent magnets 4 (number of magnetic poles), 8

slots

37, and 32 segments 41.
A riser 43 is integrally formed at the end of each segment 41 on the armature core 6 side, and is bent in a manner of folding back to the outer diameter side. The riser 43 is for connecting the armature coil 7 to the segment 41, and a winding 38 constituting the armature coil 7 is wound around and fixed by fusing. Thereby, the segment 41 and the armature coil 7 corresponding to this are electrically connected.

(End bracket)
The end bracket 17 that covers the opening 2c of the yoke 2 is formed in a substantially disk shape, and a convex portion 15 that protrudes outward is formed in a large part of the center. By forming the convex portion 15, the inner surface side becomes concave. The inner surface side of the concave convex portion 15 functions as an accommodating concave portion 16 for accommodating a brush 22 described later.
A boss portion 18 is formed on the end portion (bottom portion) 15a of the convex portion 15 so as to protrude further outward due to a step at a substantially central portion in the radial direction. A bearing 19 for rotatably supporting the other end side of the rotating shaft 5 is press-fitted and fixed to the boss portion 18.

A stay 9 is provided on the outer peripheral side of the end bracket 17 and extends outward. The stay 9 is used when the electric motor 1 is fixed, and has an insertion hole 9a into which a bolt (not shown) can be inserted.
A holder stay 20 is attached to the storage recess 16 of the end bracket 17. The holder stay 20 is made of resin and formed in a substantially disc shape, and two brush holders 21 are fixed to the inner surface.

The brush holder 21 is formed in a rectangular parallelepiped box shape by brass or the like, and is arranged so that the longitudinal direction thereof is along the radial direction, and is opposed to each other around the rotation shaft 5.
The brush holder 21 is provided with a brush 22 that is urged via a coil spring 23 so that the brush 22 can advance and retreat relative to the commutator 13.
Since the tips of the brushes 22 are urged by the coil springs 23, they are in sliding contact with the segments 41 of the commutator 13. The brush 22 is electrically connected to an external power source (both not shown) via a pigtail. For this reason, a voltage is applied to the armature coil 7 via the segment 41 by making sliding contact with the segment 41.

(First embodiment)
(Wound structure of armature coil)
Next, the winding structure of the armature coil 7 will be described with reference to FIGS.
3 and 4 are development views of the armature 3, and a gap between adjacent teeth 36 corresponds to the slot 37. In the following FIGS. 3 and 4, each segment 41 and each tooth 36 will be described by sequentially numbering them in the circumferential direction.

3 and 4, in the present embodiment, the circumferential center of the first tooth 36 and the circumferential center of the first segment 41 are arranged on the same straight line. However, the present invention is not limited to this, and the circumferential center position of the first tooth 36 and the circumferential center position of the first segment 41 may be shifted from each other. That is, each tooth 36 and each segment 41 are assigned numbers in order in the circumferential direction, and the relationship between the numbers of the teeth 36 and the numbers of the segments 41 of the winding 38 to be wound or connected is as follows. It is sufficient that the relationship is described in detail.

Here, the armature coil 7 is formed by winding the winding 38 by a double flyer system. The double flyer method uses two flyers (not shown) of a winding machine used for routing the windings 38 and winds the windings 38 at two locations simultaneously in a point-symmetrical relationship about the rotating shaft 5. A method of turning.
For this reason, the armature coil 7 is mainly composed of two

armature coils

71 and 72, which are a first armature coil 71 (see FIG. 3) and a second armature coil 72 (see FIG. 4).

That is, when the double flyer method is adopted, there are two winding start ends 38a of the winding 38, and each segment No. 22 exists in a point-symmetric position around the rotation shaft 5 (see FIG. 3). And the sixth segment 41 (see FIG. 4). That is, the winding start end 38a of the winding 38 is wound around the riser 43 of the 22nd segment 41 and the riser 43 of the 6th segment 41, respectively.

Then, a winding procedure that starts winding from the 22nd segment 41 and a winding procedure that starts winding from the 6th segment 41, that is, a routing procedure of the winding 38 that forms the first armature coil 71, The routing procedure of the winding 38 that forms the two-armature coil 72 is point-symmetric about the rotation axis 5. Therefore, in the following description, only the routing procedure of the winding 38 forming the first armature coil 71 will be described, and the description of the routing procedure of the winding 38 forming the second armature coil 72 will be omitted.

In the following description, the case where the winding direction of the winding 38 is the clockwise direction will be referred to as the forward direction, and the case where the winding direction is the counterclockwise direction will be referred to as the reverse direction. Further, the number of turns of the winding 38 around each tooth 36 is indicated using a natural number N. 3 and 4, the winding 38 when the number of turns of the winding 38 is 2N is indicated by a solid line, and the number of turns of the winding 38 is N times (half the winding 38 indicated by the solid line). The winding 38 is indicated by a broken line.

As shown in FIG. 3, in order to form the first armature coil 71, first, the winding start end 38 a of the winding 38 is connected to the No. 22 segment 41, and then the winding 38 is attached to the No. 1 tooth 36. After winding in the forward direction 2N times, the winding 38 is connected to the first segment 41.
Subsequently, after winding the winding 38 around the first tooth 36 2N times in the forward direction, the winding 38 is connected to the 12th segment 41.

Subsequently, the winding 38 is wound N times on the fifth tooth 36 in the reverse direction, and then the winding 38 is wound N times on the eighth tooth 36 in the reverse direction. The winding 38 is connected.
Next, after winding the winding 38 around the fifth tooth 36 N times in the reverse direction, the winding 38 is wound N times around the eighth tooth 36 in the reverse direction, and further into the second segment 41. The winding 38 is connected.

Subsequently, after winding the winding 38 around the fourth tooth 36 2N times in the forward direction, the winding 38 is connected to the 13th segment 41.
Subsequently, after winding the winding 38 around the fourth tooth 36 2N times in the forward direction, the winding 38 is connected to the 24th segment 41.

Subsequently, the winding 38 is wound N times on the eighth tooth 36 in the reverse direction, and then the winding 38 is wound N times on the third tooth 36 in the reverse direction. The winding 38 is connected.
Subsequently, the winding 38 is wound N times on the eighth tooth 36 in the reverse direction, and then the winding 38 is wound N times on the third tooth 36 in the reverse direction. The winding 38 is connected.

Subsequently, after winding the winding 38 around the 7th tooth 36 2N times in the forward direction, the winding 38 is connected to the 25th segment 41.
Subsequently, after winding the winding 38 around the No. 7 tooth 36 2N times in the forward direction, the winding 38 is connected to the No. 4 segment 41.

Subsequently, after winding the winding 38 around the third tooth 36 N times in the reverse direction, winding the winding 38 around the sixth tooth 36 N times in the reverse direction, and further, the 15th segment 41 Winding 38 is connected to.
Subsequently, after winding the winding 38 around the third tooth 36 N times in the reverse direction, winding the winding 38 around the sixth tooth 36 N times in the reverse direction. Winding 38 is connected to.

Subsequently, after winding the winding 38 around the second tooth 36 2N times in the forward direction, the winding 38 is connected to the fifth segment 41.
Subsequently, after winding the winding 38 around the second tooth 36 2N times in the forward direction, the winding 38 is connected to the 16th segment 41.

Subsequently, the winding 38 is wound N times on the sixth tooth 36 in the reverse direction, the winding 38 is wound N times on the first tooth 36 in the reverse direction, and the 27th segment 41 is further wound. Winding 38 is connected to.
Subsequently, the winding 38 is wound N times on the sixth tooth 36 in the reverse direction, and then the winding 38 is wound N times on the first tooth 36 in the reverse direction. To the winding end 38b of the winding 38. Thereby, the formation of the first armature coil 71 is completed.

As described above, the first armature coil 71 and the second armature coil 72 are continuously formed in series by the windings 38, respectively. However, the winding 38 forming the first armature coil 71 and the second armature coil 72 may be cut every time it is connected to the segment 41. That is, the 1st armature coil 71 should just be formed as follows.

That is, between the 22nd segment 41 and the 1st segment 41, the terminal portion of the winding 38 wound in the forward direction 2N times on the 1st tooth 36 is connected.
Between the first segment 41 and the twelfth segment 41, a terminal portion of a winding 38 wound around the first tooth 36 2N times in the forward direction is connected.
Between the 12th segment 41 and the 23rd segment 41, it was wound N times on the 5th tooth 36 in the reverse direction and N times on the 8th tooth 36 in the reverse direction. A terminal portion of the winding 38 is connected.

Between the No. 23 segment 41 and the No. 2 segment 41, the No. 5 tooth 36 was wound N times in the reverse direction, and the No. 8 tooth 36 was wound N times in the reverse direction. A terminal portion of the winding 38 is connected.
Between the second segment 41 and the thirteenth segment 41, a terminal portion of a winding 38 wound in the forward direction on the fourth tooth 36 is connected 2N times.
Between the thirteenth segment 41 and the twenty-fourth segment 41, a terminal portion of a winding 38 wound in the forward direction on the fourth tooth 36 is connected 2N times.

Between the 24th segment 41 and the 3rd segment 41, it was wound N times around the 8th tooth 36 in the reverse direction and at the same time N times wound around the 3rd tooth 36. A terminal portion of the winding 38 is connected.
Between No. 3 segment 41 and No. 14 segment 41, the No. 8 tooth 36 was wound N times in the reverse direction, and the No. 3 tooth 36 was wound N times in the reverse direction. A terminal portion of the winding 38 is connected.

Between the 14th segment 41 and the 25th segment 41, a terminal portion of a winding 38 wound in a forward direction 2N times on a 7th tooth 36 is connected.
Between the No. 25 segment 41 and the No. 4 segment 41, a terminal portion of a winding 38 wound in the forward direction 2N times on the No. 7 tooth 36 is connected.
Between the No. 4 segment 41 and the No. 15 segment 41, the No. 3 tooth 36 was wound N times in the reverse direction, and the No. 6 tooth 36 was wound N times in the reverse direction. A terminal portion of the winding 38 is connected.

Between No. 15 segment 41 and No. 26 segment 41, the No. 3 tooth 36 was wound N times in the reverse direction, and the No. 6 tooth 36 was wound N times in the reverse direction. A terminal portion of the winding 38 is connected.
Between the 26th segment 41 and the 5th segment 41, a terminal portion of a winding 38 wound in the forward direction 2N times on the second tooth 36 is connected.
Between the No. 5 segment 41 and the No. 16 segment 41, a terminal portion of a winding 38 wound around the No. 2 tooth 36 2N times in the forward direction is connected.

Between the No. 16 segment 41 and the No. 27 segment 41, the No. 6 tooth 36 was wound N times in the reverse direction, and the No. 1 tooth 36 was wound N times in the reverse direction. A terminal portion of the winding 38 is connected.
Between the No. 27 segment 41 and the No. 6 segment 41, the No. 6 tooth 36 was wound N times in the reverse direction and the No. 1 tooth 36 was wound N times in the reverse direction. A terminal portion of the winding 38 is connected.

In addition, the 2nd armature coil 71 should just be formed in point symmetry centering on the rotating shaft 5 with respect to the 1st armature coil 71 shown above.

The armature coil 7 (the first armature coil 71 and the second armature coil 72) configured as described above has an eight-phase structure.
An appropriate magnetic field is generated in the eight-phase armature coil 7, and the armature 3 is rotated by a magnetic attractive force or a repulsive force generated between the magnetic field and the permanent magnet 4 of the yoke 2. As a result of this rotation, the segments 41 in sliding contact with the brush 22 are sequentially changed, so that the direction of the current flowing through the armature coil 7 is switched, so-called rectification is performed, and the armature 3 is continuously rotated.

Therefore, according to the first embodiment described above, the number of segments 41 can be 32 while the number of magnetic poles is 6 and the number of slots 37 is 8. In other words, in the eight-phase structure slot 37, the number of segments 41 is usually 16, but in the present embodiment, the number of segments 41 can be doubled to 32. For this reason, the voltage between segments can be reduced and the life of the brush 22 can be further extended without increasing the size of the electric motor 1.
Further, the number of brushes 22 can be reduced without using a short-circuit wire as in the prior art. For this reason, the manufacturing cost of the electric motor 1 can be reduced.

(Second Embodiment)
(Wound structure of armature coil)
Next, a second embodiment will be described with reference to FIGS.
5 and 6 are development views of the armature 3, and a gap between adjacent teeth 36 corresponds to the slot 37. In the second embodiment, the same reference numerals are given to the same aspects as those in the first embodiment, and the description thereof is omitted. In the following FIG. 5 and FIG. 7, similarly to the first embodiment described above, each segment 41 and each tooth 36 will be described by sequentially numbering them in the circumferential direction.

As shown in FIGS. 5 and 6, the difference between the second embodiment and the first embodiment described above is that the winding structure of the armature coil 7 in the second embodiment and the armature coil 7 in the first embodiment. Is different from the winding structure.
Note that the armature coil 7 of the second embodiment is largely composed of two

armature coils

71 and 72, a first armature coil 71 (see FIG. 5) and a second armature coil 72 (see FIG. 6). The coil 7 is the same as the first embodiment described above in that the coil 38 is formed by being wound by a double flyer system.

That is, the winding start end 38 a of the winding 38 is wound around the riser 43 of the 22nd segment 41 and the riser 43 of the 6th segment 41, and the two

armature coils

71 and 72 are centered on the rotating shaft 5. Thus, it is formed point-symmetrically. For this reason, in the following description, only the routing procedure of the winding 38 forming the first armature coil 71 shown in FIG. 5 will be described, and the routing procedure of the winding 38 forming the second armature coil 72 shown in FIG. The description of is omitted.

As shown in FIG. 5, in order to form the first armature coil 71, first, the winding start end 38a of the winding 38 is connected to the No. 22 segment 41, and then the No. 6 teeth 36 and No. 7 teeth are connected. A winding 38 is inserted into a slot 37 between the windings 36. Next, the winding 38 is wound around the first tooth 36 in the forward direction, and then the winding 38 is connected to the first segment 41.
Subsequently, the winding 38 is wound around the first tooth 36 in the forward direction a predetermined number of times, and then the winding 38 is inserted into the slot 37 between the third tooth 36 and the fourth tooth 36. Thereafter, the winding 38 is connected to the 12th segment 41.

Subsequently, the winding 38 is wound once around the fourth tooth. Next, after winding the winding 38 around the fifth tooth 36 a predetermined number of times in the reverse direction, the winding 38 is wound around the eighth tooth 36 a predetermined number of times in the reverse direction. Next, the winding 38 is inserted into the slot 37 between the 6th tooth 36 and the 7th tooth 36, and then the winding 38 is connected to the 23rd segment 41.
Subsequently, the winding 38 is inserted into the slot 37 between the sixth tooth 36 and the seventh tooth 36. Next, after winding the winding 38 around the fifth tooth 36 a predetermined number of times in the reverse direction, the winding 38 is wound around the eighth tooth 36 a predetermined number of times in the reverse direction. Further, after the winding 38 is inserted into the slot 37 between the first tooth 36 and the second tooth 36, the winding 38 is connected to the second segment 41.

Subsequently, the winding 38 is inserted into the slot 37 between the first tooth 36 and the second tooth 36, and the winding 38 is wound around the fourth tooth 36 in the forward direction a predetermined number of times. The winding 38 is connected to the segment 41 of the number.
Subsequently, the winding 38 is wound around the fourth tooth 36 in a predetermined direction, and then the winding 38 is inserted into the slot 37 between the sixth tooth 36 and the seventh tooth 36. The winding 38 is connected to the 24th segment 41.

Subsequently, after winding the winding 38 around the 7th tooth 36 once, the winding 38 is wound around the 8th tooth 36 in the reverse direction a predetermined number of times. Next, a winding 38 is wound around the third tooth 36 a predetermined number of times in the reverse direction, and the winding 38 is connected to the third segment 41.
Subsequently, the winding 38 is inserted into the slot 37 between the first tooth 36 and the second tooth 36. Next, the winding 38 is wound around the eighth tooth 36 in the reverse direction a predetermined number of times, and then the winding 38 is wound around the third tooth 36 in the reverse direction a predetermined number of times. Thereafter, the winding 38 is inserted into the slot 37 between the fourth tooth 36 and the fifth tooth 36, and the winding 38 is connected to the 14th segment 41.

Subsequently, after the winding 38 is inserted into the slot 37 between the 4th tooth 36 and the 5th tooth 36, the winding 38 is wound around the 7th tooth 36 in a predetermined direction, and further 25 The winding 38 is connected to the segment 41 of the number.
Subsequently, the winding 38 is wound around the seventh tooth 36 in the forward direction a predetermined number of times, and then the winding 38 is inserted into the slot 37 between the first tooth 36 and the second tooth 36. Thereafter, the winding 38 is connected to the fourth segment 41.

Subsequently, the winding 38 is wound around the second tooth 36 once. Next, after winding the winding 38 around the third tooth 36 a predetermined number of times in the reverse direction, the winding 38 is wound around the sixth tooth 36 a predetermined number of times in the reverse direction. Thereafter, the winding 38 is inserted into the slot 37 between the fourth tooth 36 and the fifth tooth 36, and then the winding 38 is connected to the 15th segment 41.
Subsequently, the winding 38 is inserted into the slot 37 between the fourth tooth 36 and the fifth tooth 36. Next, after winding the winding 38 around the third tooth 36 a predetermined number of times in the reverse direction, the winding 38 is wound around the sixth tooth 36 a predetermined number of times in the reverse direction. Thereafter, the winding 38 is inserted into the slot 37 between the 7th tooth 36 and the 8th tooth 36, and the winding 38 is connected to the 26th segment 41.

Subsequently, the winding 38 is inserted into the slot 37 between the seventh tooth 36 and the eighth tooth 36. Next, after winding the winding 38 around the second tooth 36 a predetermined number of times in the forward direction, the winding 38 is connected to the fifth segment 41.
Subsequently, a winding 38 is inserted into a slot 37 between the first tooth 36 and the second tooth 36, and further wound into a slot 37 between the fourth tooth 36 and the fifth tooth 36. After inserting 38, the winding 38 is connected to the 16th segment 41.

Subsequently, the winding 38 is wound around the fifth tooth 36 once. Next, the winding 38 is wound around the sixth tooth 36 in a reverse direction a predetermined number of times, and then the winding 38 is wound around the first tooth 36 a predetermined number of times in the reverse direction. Thereafter, the winding 38 is inserted into the slot 37 between the seventh tooth 36 and the eighth tooth 36, and the winding 38 is connected to the 27th segment 41.
Subsequently, the winding 38 is inserted into the slot 37 between the seventh tooth 36 and the eighth tooth 36. Next, the winding 38 is wound around the sixth tooth 36 in a reverse direction a predetermined number of times, and then the winding 38 is wound around the first tooth 36 a predetermined number of times in the reverse direction. Thereafter, the winding 38 is inserted into the slot 37 between the second tooth 36 and the third tooth 36, and the winding end 38 b of the winding 38 is connected to the sixth segment 41. Thereby, the formation of the first armature coil 71 is completed.

As described above, the first armature coil 71 and the second armature coil 72 are each continuously formed in series by the winding 38.
Here, for example, the predetermined number of turns of the winding 38 around each tooth 36 when the first armature coil 71 is formed will be described more specifically as follows.
That is, as shown in FIG. 7, for example, the first tooth 36 is wound 9.5 times, the fourth tooth 36 is once, the fifth tooth 36 is wound 4.5 times, and then wound five times. To do. In the eighth tooth 36, the first armature coil 71 as shown in FIG. 5 is formed by winding four times after the fifth winding and repeating this in order along the circumferential direction.

Further, the minimum number of turns necessary for the present invention to be established is as follows.
1st tooth 36, 1.5 times,

4th tooth

36, 1 time, 5th tooth 36, 1.5 times and then 1 time,

8th tooth

36, 1 time Wind once after turning. Then, by repeating this in order along the circumferential direction, a first armature coil 71 as shown in FIG. 5 is formed.

Therefore, according to the second embodiment described above, the same effects as those of the first embodiment described above can be obtained. In forming the first armature coil 71 and the second armature coil 72, the winding 38 can be routed as far as possible to the side opposite to the commutator 13 with the armature core 6 interposed therebetween. For this reason, the winding thickness of the winding 38 between the armature core 6 and the commutator 13 can be suppressed. Therefore, it is possible to prevent the riser 43 of the segment 41 and the winding 38 from interfering with each other while reducing the size of the electric motor 1 and to reliably prevent the winding 38 from being damaged.

In the second embodiment described above, the case where the first armature coil 71 and the second armature coil 72 are continuously formed in series by the windings 38 has been described. However, the present invention is not limited to this, and the windings 38 forming the first armature coil 71 and the second armature coil 72 may be cut each time they are connected to the segment 41. Further, the slot 37 to be inserted can be arbitrarily set in order to route the winding 38 on the side opposite to the commutator 13 with the armature core 6 interposed therebetween. That is, the 1st armature coil 71 should just be formed as follows.

The first armature coil 71 is wound around the first tooth 36 by a predetermined number of times in the forward direction between the No. 22 segment 41 and the No. 1 segment 41, and on both sides in the circumferential direction of the No. 1 tooth 36. A terminal portion of the winding 38 that is inserted once into the other slot 37 excluding the slot 37 is connected.
Between the first segment 41 and the twelfth segment 41, a terminal portion of a winding 38 wound around the first tooth 36 in a forward direction is connected a predetermined number of times.
Between the 12th segment 41 and the 23rd segment 41, the 5th tooth 36 is wound a predetermined number of times and the 8th tooth 36 is wound a predetermined number of times in the opposite direction. A terminal portion of a winding 38 wound in the forward direction once is connected to the other teeth 36 excluding the eighth tooth 36.

Between the No. 23 segment 41 and the No. 2 segment 41, the No. 5 tooth 36 was wound in the reverse direction a predetermined number of times and the No. 8 tooth 36 was wound in the reverse direction a predetermined number of times. A terminal portion of the winding 38 is connected.
Between the second segment 41 and the thirteenth segment 41, the slots 37 wound around the fourth tooth 36 in the forward direction a predetermined number of times and excluding the slots 37 located on both sides in the circumferential direction of the fourth tooth 36 are excluded. The terminal portion of the winding 38 inserted once in the other slot 37 is connected.
Between the thirteenth segment 41 and the twenty-fourth segment 41, a terminal portion of a winding 38 wound in the forward direction around the fourth tooth 36 is connected.

Between the No. 24 segment 41 and the No. 3 segment 41, the No. 8 tooth 36 is wound around the No. 8 tooth 36 for a predetermined time, and the No. 3 tooth 36 is wound in the opposite direction, respectively. A terminal portion of a winding 38 wound in the forward direction once is connected to the other teeth 36 excluding the third tooth 36.
Between the No. 3 segment 41 and No. 14 segment 41, the No. 8 tooth 36 is wound in the reverse direction a predetermined time, and the No. 3 tooth 36 is wound in the opposite direction. The terminal portion of the winding 38 inserted once into the other slot 37 except for any one slot 37 of the third tooth 36 is connected.

Between the 14th segment 41 and the 25th segment 41, the slot 37 wound around the 7th tooth 36 in the forward direction and the slots 37 positioned on both sides in the circumferential direction of the 7th tooth 36 is excluded. The terminal portion of the winding 38 inserted once in the other slot 37 is connected.
Between the 25th segment 41 and the 4th segment 41, a terminal portion of a winding 38 wound in the forward direction around the 7th tooth 36 is connected.
Between the No. 4 segment 41 and the No. 15 segment 41, the No. 3 tooth 36 is wound in a reverse direction a predetermined number of times, and the No. 6 tooth 36 is wound in a reverse direction. A terminal portion of a winding 38 wound in the forward direction once is connected to the other teeth 36 excluding the sixth tooth 36.

Between the 15th segment 41 and the 26th segment 41, the third tooth 36 is wound a predetermined number of times, and the sixth tooth 36 is wound a predetermined number of times in the opposite direction. The terminal portions of the windings 38 inserted once are connected to the other slots 37 except for the slots 37 located on both circumferential sides of any one of the sixth teeth 36.
Between the 26th segment 41 and the 5th segment 41, a terminal portion of a winding 38 wound in the forward direction around the second tooth 36 is connected.
Between the 5th segment 41 and the 16th segment 41, the terminal portion of the winding 38 is connected across the armature core 6 on the side opposite to the commutator 13.

Between the 16th segment 41 and the 27th segment 41, the 6th tooth 36 is wound in the reverse direction a predetermined time, and the 1st tooth 36 is wound in the reverse direction a predetermined time, And the terminal part of the coil | winding 38 wound by the forward direction once was connected to the other teeth 36 except the 6th tooth | gear 36 and the 1st tooth | gear 36.
Between No. 27 segment 41 and No. 6 segment 41, the No. 6 tooth 36 was wound in the reverse direction a predetermined number of times, and the No. 1 tooth 36 was wound in the reverse direction a predetermined number of times. A terminal portion of the winding 38 is connected.
The second armature coil 71 may be formed point-symmetrically with respect to the first armature coil 71 shown above with the rotation axis 5 as the center.

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention.
For example, in the above-described embodiment, the case where the armature coil 7 is formed by the double flyer method has been described. However, the present invention is not limited to this, and it is also possible to form the armature coil 7 by a so-called single flyer method performed by only one flyer.

In the above-described embodiment, for example, the case where the electric motor 1 is used as a fan motor for cooling an automobile radiator has been described. However, the present invention is not limited to this. For example, the electric motor 1 can be used for driving various devices such as a device for driving a vehicle seat and a device for driving a sunroof.

DESCRIPTION OF SYMBOLS 1 ... Electric motor 2 ... Yoke 3 ... Armature 4 ... Permanent magnet (magnetic pole)
5 ... Rotating shaft 6 ... Armature core 7 ... Armature coil 13 ... Commutator 22 ... Brush 36 ... Teeth 37 ... Slot 38 ... Winding 41 ... Segment 71 ... First armature coil 72 ... Second armature coil

Claims

A yoke provided with a permanent magnet having 6 magnetic poles;
A rotating shaft rotatably provided inside the yoke in the radial direction;
An armature core having eight teeth attached to the rotating shaft and extending radially along a radial direction, and eight slots formed between the teeth;
A winding wound around each of the teeth;
A commutator provided adjacent to the armature core on the rotating shaft and having 32 segments arranged in the circumferential direction;
A brush for powering the winding through the segment;
An electric motor comprising:
When the eight teeth are sequentially numbered along the circumferential direction, and further, the 32 segments are numbered sequentially along the circumferential direction, and N is a natural number,
Between the segment No. 22 and the segment No. 1, the end of the winding wound in the forward direction is connected to the No. 1 tooth 2N times,
Between the segment No. 1 and the segment No. 12, the terminal portion of the winding wound in the forward direction is connected to the No. 1 tooth 2N times,
Between the 12th segment and the 23rd segment, the No. 5 tooth was wound N times in the reverse direction, and the No. 8 tooth was wound N times in the reverse direction. The end of the winding is connected,
Between No. 23 segment and No. 2 segment, the No. 5 tooth was wound N times in the reverse direction, and the No. 8 tooth was wound N times in the reverse direction. The end of the winding is connected,
Between the second segment and the thirteenth segment, a terminal portion of the winding wound in the forward direction is connected to the fourth tooth, 2N times,
Between the segment No. 13 and the segment No. 24, a terminal portion of the winding wound in the forward direction is connected to the No. 4 tooth 2N times,
Between the 24th segment and the 3rd segment, it was wound around the 8th tooth N times in the reverse direction and at the same time, it was wound around the 3rd tooth N times in the reverse direction. The end of the winding is connected,
Between No. 3 segment and No. 14 segment, the No. 8 tooth was wound N times in the reverse direction, and the No. 3 tooth was wound N times in the reverse direction. The end of the winding is connected,
Between the segment No. 14 and the segment No. 25, the end of the winding wound in the forward direction is connected to the No. 7 tooth 2N times,
Between the 25th segment and the 4th segment, a terminal portion of the winding wound in the forward direction is connected to the 7th tooth 2N times,
Between the No. 4 segment and No. 15 segment, the No. 3 tooth was wound N times in the reverse direction, and the No. 6 tooth was wound N times in the reverse direction. The end of the winding is connected,
Between the 15th segment and the 26th segment, the No. 3 tooth was wound N times in the reverse direction, and the No. 6 tooth was wound N times in the reverse direction. The end of the winding is connected,
Between the segment of No. 26 and the segment of No. 5, the terminal portion of the winding wound in the forward direction is connected to the No. 2 tooth 2N times,
Between the No. 5 segment and the No. 16 segment, a terminal portion of the winding wound in the forward direction is connected to the No. 2 tooth 2N times,
Between the No. 16 segment and the No. 27 segment, the No. 6 tooth was wound N times in the reverse direction, and the No. 1 tooth was wound N times in the reverse direction. The end of the winding is connected,
Between the 27th segment and the 6th segment, the 6th tooth was wound N times in the reverse direction and the 1st tooth was wound N times in the reverse direction. A terminal portion of the winding is connected to form a first armature coil;
An electric motor in which a second armature coil is formed so as to be point-symmetric about the first armature coil and the rotation axis.
A yoke provided with a permanent magnet having 6 magnetic poles;
A rotating shaft rotatably provided inside the yoke in the radial direction;
An armature core having eight teeth attached to the rotating shaft and extending radially along a radial direction, and eight slots formed between the teeth;
A winding wound around each of the teeth;
A commutator provided adjacent to the armature core on the rotating shaft and having 32 segments arranged in the circumferential direction;
A brush for powering the winding through the segment;
An electric motor comprising:
When the eight teeth are sequentially numbered along the circumferential direction, and the 32 segments are numbered sequentially along the circumferential direction,
Between the segment No. 22 and the segment No. 1 except for the slot wound around the No. 1 tooth in the forward direction and positioned on both sides in the circumferential direction of the No. 1 tooth. The end of the winding inserted once into the other slot is connected;
Between the first segment and the twelfth segment, a terminal portion of the winding wound in the forward direction is connected to the first tooth a predetermined number of times,
Between the No. 12 segment and the No. 23 segment, the No. 5 tooth is wound in the reverse direction a predetermined number of times, and the No. 8 tooth is wound in the opposite direction, respectively, and the No. 5 tooth. And the end of the winding wound in the forward direction is connected to the other teeth except for the teeth No. 8 and No. 8,
Between the 23rd segment and the 2nd segment, the 5th tooth was wound in the reverse direction a predetermined number of times, and the 8th tooth was wound in the reverse direction a predetermined time. The end of the winding is connected,
Between the second segment and the thirteenth segment, the slots wound around the fourth tooth in the forward direction a predetermined number of times and excluding the slots located on both sides in the circumferential direction of the fourth tooth The end of the winding inserted once into the other slot is connected;
Between the segment No. 13 and the segment No. 24, a terminal portion of the winding wound in the forward direction is connected to the No. 4 tooth a predetermined number of times,
Between the 24th segment and the 14th segment, the 8th tooth is wound a predetermined number of times and the 3rd tooth is wound a predetermined number of times in the opposite direction, and the 8th tooth And the terminal portion of the winding wound in the forward direction once is connected to the other teeth except for the third tooth.
Between the 3rd segment and the 14th segment, the 8th tooth is wound in the reverse direction a predetermined number of times and the 3rd tooth is wound in the opposite direction. And the terminal portion of the winding inserted once into the other slot excluding the slot of any one of the third teeth,
Between the 14th segment and the 25th segment, except for the slots wound around the 7th tooth in the forward direction and positioned on both sides in the circumferential direction of the 7th tooth. The end of the winding inserted once into the other slot is connected;
Between the 25th segment and the 4th segment, a terminal portion of the winding wound in the forward direction is connected to the 7th tooth a predetermined number of times,
Between the No. 4 segment and No. 15 segment, the No. 3 tooth is wound in a reverse direction a predetermined number of times, and the No. 6 tooth is wound in a reverse direction, and the No. 3 tooth. And the terminal part of the said coil | winding wound by the forward direction once was connected to the said other teeth except the said 6th teeth,
Between the segment No. 15 and the segment No. 26, the third tooth is wound in the reverse direction a predetermined number of times on the third tooth and the predetermined number of times on the sixth tooth. And the ends of the windings inserted once into the other slots except the slots located on both circumferential sides of any one of the teeth of No. 6 and No. 6,
Between the 26th segment and the 5th segment, a terminal portion of the winding wound in the forward direction is connected to the second tooth a predetermined number of times,
Between the segment No. 5 and the segment No. 16 is connected a terminal portion of the winding that is spanned on the opposite side of the commutator of the armature core,
Between the 16th segment and the 27th segment, the 6th tooth is wound a predetermined number of times in the reverse direction, and the 1st tooth is wound a predetermined number of times in the reverse direction, And the terminal portion of the winding wound in the forward direction is connected once to the other teeth excluding the 6th tooth and the 1st tooth,
Between the 27th segment and the 6th segment, the 6th tooth was wound a predetermined number of times in the reverse direction, and the 1st tooth was wound a predetermined number of times in the reverse direction. A terminal portion of the winding is connected to form a first armature coil;
An electric motor in which a second armature coil is formed so as to be point-symmetric about the first armature coil and the rotation axis.
Between the segment No. 22 and the segment No. 1, the slot between the No. 6 teeth and the No. 7 teeth is wound around the No. 1 tooth in the forward direction a predetermined number of times. Is connected to the end of the winding that is inserted once,
Between the No. 12 segment and the No. 23 segment, the No. 5 tooth is wound in the reverse direction a predetermined number of times, and the No. 8 tooth is wound in the opposite direction. To the end of the winding wound in the forward direction once,
Between the second segment and the thirteenth segment, the slot is wound around the fourth tooth for a predetermined number of times in the forward direction and between the first tooth and the second tooth. Is connected to the end of the winding that is inserted once,
Between the 24th segment and the 14th segment, the 8th tooth is wound around the 8th tooth and the 3rd tooth is wound in the opposite direction, respectively, and the 7th tooth To the end of the winding wound in the forward direction once,
Between the 3rd segment and the 14th segment, the 8th tooth is wound in the opposite direction, and the 3rd tooth is wound in the reverse direction, respectively, and the 4th tooth. And the terminal portion of the winding inserted once in the slot between the teeth of No. 5 and the teeth,
Between the 14th segment and the 25th segment, the slot between the 4th tooth and the 5th tooth, and the 7th tooth and the 8th tooth. The end of the winding inserted into the slot is connected,
Between the fourth segment and the fifteenth segment, the third tooth is wound a predetermined number of times, and the sixth tooth is wound a predetermined number of times in the opposite direction, and the second tooth. To the end of the winding wound in the forward direction once,
Between the segment No. 15 and the segment No. 26, the teeth of No. 3 are wound in the reverse direction a predetermined number of times and the teeth of No. 6 a predetermined number of times, respectively, and the teeth of No. 7 And the end of the winding inserted once in the slot between the teeth of No. 8 and
Between the No. 5 segment and the No. 16 segment, the slot between the No. 1 teeth and No. 2 teeth, and between the No. 4 teeth and No. 5 teeth. The end of the winding inserted into the slot is connected,
Between the 16th segment and the 27th segment, the 6th tooth is wound in the reverse direction for a predetermined time, and the 1st tooth is wound in the forward direction for a predetermined time, The electric motor according to claim 2, wherein a terminal portion of the winding wound in the forward direction once is connected to the fifth tooth.
A yoke provided with a permanent magnet having 6 magnetic poles;
A rotating shaft rotatably provided inside the yoke in the radial direction;
An armature core having eight teeth attached to the rotating shaft and extending radially along a radial direction, and eight slots formed between the teeth;
A winding wound around each of the teeth;
A commutator provided adjacent to the armature core on the rotating shaft and having 32 segments arranged in the circumferential direction;
A brush for powering the winding through the segment;
An electric motor winding method comprising:
When the eight teeth are sequentially numbered along the circumferential direction, and further, the 32 segments are numbered sequentially along the circumferential direction, and N is a natural number,
Connect the winding start end of the winding to the segment No. 22;
Then, after winding the winding to the first tooth 2N times in the forward direction, the winding is connected to the first segment,
Then, after winding the winding around the No. 1 tooth 2N times in the forward direction, connecting the winding to the No. 12 segment,
After that, the winding was wound N times on the teeth No. 5 in the reverse direction, and then the winding was wound N times on the teeth No. 8 in the reverse direction, and further on the segment No. 23 Connect the windings,
Thereafter, the winding is wound N times on the teeth No. 5 in the reverse direction, and then the winding is wound N times on the teeth No. 8 in the reverse direction, and further on the second segment. Connect the windings,
Then, after winding the winding to the 4th tooth 2N times in the forward direction, connecting the winding to the 13th segment,
Then, after winding the winding around the No. 4 tooth 2N times in the forward direction, connecting the winding to the No. 24 segment,
Thereafter, the winding is wound N times on the teeth No. 8 in the reverse direction, and then the winding is wound N times on the teeth No. 3 in the reverse direction, and further on the third segment. Connect the windings,
Thereafter, the winding is wound N times on the teeth No. 8 in the reverse direction, and then the winding is wound N times on the teeth No. 3 in the reverse direction, and further on the 14th segment. Connect the windings,
Then, after winding the winding 2N times on the 7th tooth in the forward direction, connecting the winding to the 25th segment,
Then, after winding the winding around the 7th tooth 2N times in the forward direction, connecting the winding to the 4th segment,
Thereafter, the winding is wound N times on the third tooth in the reverse direction, and then the winding is wound N times on the sixth tooth in the reverse direction, and further on the 15th segment. Connecting the windings,
Thereafter, the winding is wound N times on the third tooth in the reverse direction, and then the winding is wound N times on the sixth tooth in the reverse direction, and further on the 26th segment. Connecting the windings,
After that, the winding is wound in the forward direction 2N times on the second tooth, and then the winding is connected to the fifth segment.
Then, after winding the winding around the No. 2 tooth 2N times in the forward direction, connecting the winding to the No. 16 segment,
Thereafter, the winding is wound N times on the 6th tooth in the reverse direction, and then the winding is wound N times on the 1st tooth in the reverse direction. Connecting the windings,
Thereafter, the winding is wound N times on the teeth No. 6 in the reverse direction, and then the winding is wound N times on the teeth No. 1 in the reverse direction, and further on the No. 6 segment. Connecting the winding end of the winding to form a first armature coil;
The winding method of the electric motor which formed the 2nd armature coil so that it may become point-symmetrical centering on the 1st armature coil and the axis of rotation.
A yoke provided with a permanent magnet having 6 magnetic poles;
A rotating shaft rotatably provided inside the yoke in the radial direction;
An armature core having eight teeth attached to the rotating shaft and extending radially along a radial direction, and eight slots formed between the teeth;
A winding wound around each of the teeth;
A commutator provided adjacent to the armature core on the rotating shaft and having 32 segments arranged in the circumferential direction;
A brush for powering the winding through the segment;
An electric motor winding method comprising:
When the eight teeth are sequentially numbered along the circumferential direction, and the 32 segments are numbered sequentially along the circumferential direction,
Connect the winding start end of the winding to the segment No. 22;
Then, the winding is inserted into the slot between the 6th tooth and the 7th tooth,
Then, after winding the winding around the first tooth a predetermined number of times in the forward direction, the winding is inserted into the slot between the third tooth and the fourth tooth,
Then, connect the winding to the 12th segment,
After that, the winding is wound once around the No. 4 tooth,
Then, after winding the winding around the 5th tooth in the reverse direction a predetermined number of times, winding the winding around the 8th tooth in the reverse direction a predetermined number of times, and Insert the winding into the slot between the 7th teeth,
Then, after connecting the winding to the segment of No. 23, the winding is inserted into the slot between the teeth of No. 6 and the teeth of No. 7,
Then, after winding the winding around the teeth No. 5 predetermined times in the reverse direction, winding the winding around the teeth No. 8 predetermined times in the reverse direction,
Thereafter, the winding is inserted into the slot between the first tooth and the second tooth, and the winding is connected to the second segment,
Thereafter, the winding is inserted into the slot between the first tooth and the second tooth, and the winding is wound around the fourth tooth a predetermined number of times in the forward direction. Connect the winding to the segment of the number;
Then, after winding the winding around the No. 4 tooth in a predetermined direction, the winding is inserted into the slot between the No. 6 tooth and the No. 7 tooth,
After that, connect the winding to the 24th segment,
After that, the winding is wound once around the teeth of No. 7,
Then, after winding the winding around the teeth No. 8 predetermined times in the reverse direction, winding the winding around the teeth No. 3 predetermined times in the reverse direction,
Then, after inserting the winding into the slot between the first tooth and the second tooth, connecting the winding to the third segment,
Thereafter, the winding is inserted into the slot between the first tooth and the second tooth,
Then, after winding the winding around the teeth No. 8 predetermined times in the reverse direction, winding the winding around the teeth No. 3 predetermined times in the reverse direction,
Then, after inserting the winding into the slot between the 4th tooth and the 5th tooth, connecting the winding to the 14th segment,
After that, the winding is inserted into the slot between the 4th tooth and the 5th tooth, and the winding is wound around the 7th tooth in the forward direction by a predetermined number of times. Connect the winding to the segment of the number;
Then, after winding the winding around the No. 7 tooth a predetermined number of times in the forward direction, the winding is inserted into the slot between the No. 1 tooth and the No. 2 tooth,
Then connect the winding to the 4th segment,
After that, the winding is wound once around the second tooth,
Then, after winding the winding around the teeth No. 3 predetermined times in the reverse direction, winding the winding around the teeth No. 6 predetermined times in the reverse direction,
Then, after inserting the winding into the slot between the 4th tooth and the 5th tooth, connecting the winding to the 15th segment,
Then, the winding is inserted into the slot between the 4th tooth and the 5th tooth,
Then, after winding the winding around the teeth No. 3 predetermined times in the reverse direction, winding the winding around the teeth No. 6 predetermined times in the reverse direction,
Then, after inserting the winding into the slot between the 4th tooth and the 5th tooth, connecting the winding to the 26th segment,
Then, the winding is inserted into the slot between the teeth No. 7 and the teeth No. 8;
Then, after winding the winding around the second tooth, a predetermined number of times, connecting the winding to the fifth segment,
Thereafter, the winding is inserted into the slot between the first tooth and the second tooth and the slot between the fourth tooth and the fifth tooth, respectively. Connect the winding to the segment of the number;
After that, wind the winding once around the No. 5 tooth,
Then, after winding the winding around the tooth No. 6 predetermined times in the reverse direction, winding the winding around the No. 1 tooth predetermined times in the reverse direction,
Then, after inserting the winding into the slot between the teeth No. 7 and the teeth No. 8, connect the winding to the segment No. 27,
Then, the winding is inserted into the slot between the teeth No. 7 and the teeth No. 8;
Then, after winding the winding around the tooth No. 6 predetermined times in the reverse direction, winding the winding around the No. 1 tooth predetermined times in the reverse direction,
Thereafter, the winding is inserted into the slot between the second tooth and the third tooth, and then the winding end of the winding is connected to the sixth segment to form a first armature coil Form the
The winding method of the electric motor which formed the 2nd armature coil so that it may become point-symmetrical centering on the 1st armature coil and the axis of rotation.