JP2002010553A - Rotating field type electric motor and method for making the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating field type electric motor and a method for making it capable of simplifying a wire connection process of a winding and preventing damage of a coating of the winding when it is wound. SOLUTION: A winding 17, after it is wound to a winding wound part 16c from the base end part of first tooth 16 toward the tip end part, is wound to the winding wound part 16c toward the base end part from the tip end part of second tooth 16, so as to be wound to the winding wound part 16c toward the tip end part from the base end part of third tooth 16, the winding is continuously wound by eliminating a twist to the adjacent three teeth 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device,
More specifically, the present invention relates to a rotating field type electric motor wound with a rectangular copper wire and a method of manufacturing the same.

[0002]

2. Description of the Related Art In general, in a rotating field type electric motor as a rotating device, the connection between each coil end of a winding wound around a tooth of a stator core is determined by the winding of the winding wound around each tooth (slot). This is performed after the terminal is routed to a predetermined connection position. If the winding is a round wire, the winding can be bent in any direction, so that the winding terminal can be freely arranged at the time of connection, that is, the connection of the winding is easy.

[0003]

By the way, conventionally,
A rotating field type electric motor in which a rectangular copper wire is wound has been proposed. In such a rotating field type electric motor, since the winding wound around each tooth (slot) has a rectangular shape, it is difficult to manage each winding terminal when connecting between the coil ends of the winding. . That is, when the winding was a flat wire having a square cross section, the winding could be easily bent only in two directions. When the winding is a rectangular wire having a rectangular cross section, the winding is easily bent in the thickness direction and hardly bent in the width direction. Therefore, winding connection of a rotating field type electric motor wound with a rectangular copper wire has not been easy.

Therefore, as an example of a method for solving the above problem, a method of connecting the ends of each coil with a conductor as in the technique disclosed in Japanese Patent Application Laid-Open No. H10-248187 is conceivable. However, in that technique, when the number of slots increases, the number of connection points between each coil end and the conductor increases, and there is a problem that the number of connection steps and the connection space increase.

As another method for facilitating the winding connection process, it is conceivable to twist and wind the winding. However, the twisting of the winding deteriorates the space factor of the winding and the winding. Problems such as film damage may occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has as its object to simplify the winding connection process and to prevent damage to the film of the winding during winding. And a method for manufacturing the same.

[0007]

Means for Solving the Problems To solve the above-mentioned problems, the invention according to claim 1 comprises a stator having a rectangular winding wound on teeth and a rotor disposed inside the stator. In the rotating magnetic field type motor configured,
The gist is that the rectangular winding is continuously wound on two or more adjacent teeth without twisting.

According to a second aspect of the present invention, in the rotating magnetic field type electric motor according to the first aspect, the crossover portion of the rectangular winding wound around two adjacent teeth wound with the same rectangular winding is provided. The gist is that the two teeth are turned to the same end side.

The invention described in claim 3 is the first or second invention.
In the rotating magnetic field type motor according to the above, the rectangular winding,
The gist is that it is made of a rectangular copper wire having a rectangular cross section having a long side surface and a short side surface, and is wound so that the long side surface is in contact with each tooth.

[0010] The invention described in claim 4 is the first to third aspects of the present invention.
In the rotating magnetic field type electric motor according to any one of the above, the gist is that the rectangular winding is wound around each tooth in an odd number of layers while shifting its position along the direction in which each tooth extends.

[0011] The invention according to claim 5 provides the invention according to claims 1 to 4.
In the method of manufacturing a rotating magnetic field type electric motor according to any one of the above, a rectangular winding is formed in a winding sub-assembly in advance so as to be wound around the two or more adjacent teeth, and then the winding sub-assembly is formed. The gist of the present invention is to attach the flat rectangular winding to the two or more adjacent teeth.

According to a sixth aspect of the present invention, in the method of manufacturing a rotating magnetic field type electric motor according to the fifth aspect, the teeth on the side opposite to the rotor than the crossover portion are arranged on the base end side of the teeth on the rotor side. The gist of the present invention is to form the crossover wire portion longer so as to be disposed on the tip side of the wire.

(Operation) According to the first aspect of the present invention,
Since the rectangular winding is continuously wound without twisting on two or more adjacent teeth, two drawing ends of the rectangular winding continuously wound on two or more adjacent teeth are used. To be reduced. As a result, the winding connection process can be simplified as compared with the related art in which the number of winding ends is large.

According to the invention described in claim 2, according to claim 1,
In addition to the operation of the invention described in the above, the crossover portion of the rectangular winding wound around two adjacent teeth wound with the same rectangular winding is turned to the same end side of the two teeth. It was to so. Therefore, each crossover is turned between adjacent teeth without twisting. As a result, it is possible to prevent a decrease in the space factor of the winding with respect to the slot due to the twisting of the winding and prevent damage to the coating of the winding.

According to the invention described in claim 3, according to claim 1 of the present invention,
In addition to the effects of the inventions described in (1) and (2), the rectangular winding is wound around each tooth after being bent in a thickness direction that is easy to bend, so that winding can be easily performed.

According to the invention described in claim 4, according to claim 1 of the present invention,
In addition to the effects of the inventions of (1) to (3), the same connection as that of the single-layer winding can be maintained, and the number of turns of the winding wound around the teeth can be increased.

According to the fifth aspect of the present invention, the winding can be performed while being careful not to cause a twist at the time of winding, and the winding can be easily performed. According to the invention set forth in claim 6, in addition to the operation of the invention set forth in claim 5, the distal end portion of the teeth on the side opposite to the rotor from the crossover portion to be disposed on the base end side of the teeth on the rotor side. The crossover portion is formed longer to be disposed on the side. Therefore, compared with the case where both types of the crossover portions are formed with the same length, when the rectangular winding of the winding subassembly is mounted on the teeth, the crossover arranged on the base end side of the teeth on the rotor side. It is possible to prevent the wire portion from becoming excessively long and prevent the crossover wire portion disposed on the tip end side of the teeth on the side opposite to the rotor from being tensioned. As a result, the flat winding can be easily attached to the teeth.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a rotating magnetic field type electric motor as a rotating device will be described below with reference to FIGS.
It will be described according to.

FIG. 1 shows a rotating magnetic field type electric motor 1 according to this embodiment.
0 shows a schematic configuration. As shown in FIG. 1, the rotating magnetic field type electric motor 10 is a three-phase nine-slot motor, and includes a stator 11 and a rotor 12.

The stator 11 has an outer core 13 and an inner core 14. The outer core 13 has an annular shape, and a plurality of wedge-shaped recesses 15 a
Is provided. In the present embodiment, nine wedge-shaped recesses 15 are provided.
a is provided.

The inner core 14 has n teeth 16 extending in the radial direction and arranged in the rotational direction. In the present embodiment, nine teeth 16 are provided in the same number as the wedge-shaped concave portions 15a. A wedge-shaped convex portion 16a for fitting with the concave portion 15a is provided at a tip portion (outer end portion) of each tooth 16. The base end (inner end) of the tooth 16 is mutually connected to the adjacent one, and an annular portion 16b is formed by this connection. The portion between the base end and the tip end of the tooth 16 is defined as a winding part 16c of the tooth 16.

The winding part 16 of each tooth 16
Each of the windings 17 is wound with a winding 17 as a rectangular winding by a winding method described later. On the other hand, the rotor 12 of the electric motor 10
1 includes a rotating shaft 18, a base 19, and a permanent magnet 20, and an annular portion 16b of the stator 11 as shown in FIG.
It is rotatably supported inside.

Hereinafter, a method of winding the winding 17 around each tooth 16 will be described. In the present embodiment, the adjacent 3
One set of the teeth 16 is provided, that is, the stator 11 has three sets (the A set, the B set, and the C set) of the teeth 16. The three teeth 16 of the same set include the winding 1
7 are wound continuously. In addition, each set of teeth 16
Since the winding of the winding 17 is performed by the same method, for convenience of explanation, one set (A set) of teeth 1
Only the winding of the winding 17 around 6 will be described with reference to FIGS.

As shown in FIGS. 1 and 2, first, a winding 17 is attached to the first tooth 16 (A1).
6 is wound around the winding part 16c in a counterclockwise direction from the base end to the tip end as viewed from the tip end side.

Next, as shown in FIG. 1, the winding 1 wound around the winding part 16c of the first tooth 16 (A1)
7 is the starting end of the winding 17 wound around the winding part 16c of the second tooth 16 (A2) adjacent to the first tooth 16 (A1), and the winding 17 is used as the second tooth. The teeth 16 (A2) are wound around the winding part 16c. At this time, the first crossover portion 17a between the end of the winding 17 of the first tooth 16 (A1) and the beginning of the winding 17 of the second tooth 16 (A2) is connected to both the teeth 16 ( A1,
A2) is turned to the tip side. The second tooth 16 (A2) is wound around the winding 16c in the clockwise direction as viewed from the distal end side of the tooth 16 from the distal end to the proximal end of the tooth 16 (A2). To be worn.

Finally, the end of the winding 17 wound around the winding portion 16c of the second tooth 16 (A2) is connected to the third tooth 16 adjacent to the second tooth 16 (A2). The winding 17 wound around the winding part 16c of (A3)
And the winding 17 as the third tooth 16 (A3)
Is wound around the winding part 16c. At this time, the second crossover portion 17b between the end of the winding 17 of the second tooth 16 (A2) and the start of the winding 17 of the third tooth 16 (A3) is connected to both the teeth 16 ( A2, A3) are turned to the base end side. In the third tooth 16 (A3), the winding 17 is wound around the winding winding portion 16c in a counterclockwise direction from the base end to the tip end of the tooth 16 when viewed from the tip end side. It is designed to be wound.

If the starting end of each set of windings 17 is a first drawing end 17c and the end of each set of windings 17 is a second drawing end 17d, as shown in FIGS. The first lead ends 17c of the windings 17 of each set are all pulled out from the base end side of the first tooth 16 in each set, and the second lead ends 17d of the windings 17 of each set are all It is pulled out from the tip side of the third tooth 16 in the set.

In this embodiment, the first lead ends 17c of the three sets of windings 17 are respectively connected to COM terminals of a three-phase external drive power source (not shown), The leading end 17d is connected to the U-phase of the three-phase external drive power supply.
Phase, V-phase, and W-phase terminals. That is, the three sets of windings 17 are three-phase windings.

Further, in this embodiment, the winding 17 wound around each set of teeth 16 is a rectangular copper wire having a rectangular cross section having a long side surface and a short side surface, and the long side surface is formed of each tooth. It is wound so as to be in contact with the sixteen winding winding portions 16c. Moreover, the windings 17 are wound around the winding part 16c so that they do not overlap with each other and are shifted in position in the direction in which the winding part 16c extends.

According to the rotating magnetic field type motor 10 of the present embodiment, the following features can be obtained. (1) In the present embodiment, the end of the winding 17 wound around the first tooth 16 of each set is set as the start end of the winding 17 wound around the second tooth 16 of the same set. The winding 17 was wound continuously around the three adjacent teeth 16 without twisting so that the end of the winding 17 wound around the third tooth 16 was the starting end of the winding 17 wound around the third tooth 16 of the same set. .

Therefore, the leading end of the winding 17 wound around each of the three teeth 16 is connected to the first tooth 1
6 is reduced to two, that is, a first leading end 17c which is a starting end of the winding 17 wound around 6 and a second leading end 17d which is an end of the winding 17 wound around the third tooth 16. As a result, the connection process of the winding 17 can be simplified as compared with the related art in which the number of winding ends is large.

(2) In this embodiment, the winding 17 is wound around the winding part 16c from the base end to the tip end of the first tooth 16, and then the second tooth The third tooth 16 is wound around the winding part 16c from the base end to the tip end of the third tooth 16 from the distal end to the base end. It has become.

Accordingly, the first and second crossover portions 17a and 17b of the winding 17 are turned to the adjacent teeth 16 while bending only in the thickness direction of the winding 17 without twisting. As a result, it is possible to prevent a decrease in the space factor of the winding with respect to the slot due to the twisting of the winding and prevent damage to the coating of the winding.

(3) In this embodiment, each set of teeth 1
The winding 17 wound around 6 is made of a rectangular copper wire having a rectangular cross section having a long side surface and a short side surface, and is wound such that the long side surface comes into contact with the winding winding portion 16 c of each tooth 16. Is equipped.

Therefore, since the rectangular winding 17 is bent in the thickness direction which is easy to be bent and wound around each tooth 16, the winding can be easily wound. In addition, this embodiment may be changed as follows.

In the above embodiment, the winding 17 is wound directly on the winding portion 16c of each set of teeth 16, but as shown in FIG. 3, the winding 17 is wound around each set of teeth 16. The winding 17 to be mounted is previously set in the winding subassembly 3.
0 may be created, and the winding subassembly 30 may be mounted on the winding part 16 c of each tooth 16.

The winding sub-assembly 30, for example, winds the winding 17 on a jig (not shown) having the same shape as the winding winding portion 16c of the three adjacent teeth 16 in the same manner as in the above embodiment. The winding 17 in the mounted and wound state may be removed from the jig and may be implemented.

Further, three teeth portions 41a, 41b, and 43 having the same sectional shape as the teeth 16 as shown in FIG.
Using the jig 40 formed in parallel with the 41c, the three tooth portions 41a, 41
A winding sub-assembly 50 as shown in FIG. 4 may be formed by winding the winding 17 around b and 41c. At this time, as shown in FIG. 5, the winding 17 wound around the first teeth 41a and the winding 1 wound around the second teeth 41b.
The first crossover portion 17a of No. 7 is formed with a predetermined length so as to be hooked on the protrusion 42a provided on the jig 40. The winding 1 wound around the second teeth portion 41b
The second crossover portion 17b of the winding 17 wound around the seventh and third teeth portions 41c is connected to the projection 4 provided on the jig 40.
It is made with a predetermined length so as to hook on 2b. Then, the winding subassembly 50 created in this manner is used.
When the wire is removed from the jig 40 and assembled to the winding portions 16c of the three adjacent teeth 16, the connecting wires 17a, 1
As shown in FIG. 2, 7 b is curved in an arc shape in accordance with the teeth 16.

In these cases, in addition to the effects described in the features of the above embodiment, winding can be performed while being careful not to cause twisting during winding, and winding can be easily performed. it can.

In addition, the winding sub-assembly 50 of the above another example may be formed as shown in FIG. More specifically, first, the winding 17 is wound into a shape as shown in FIG. 6A to form the winding sub-assembly 60. next,
The crossover part 17a is bent 180 ° in the counterclockwise direction indicated by the arrow P1 in FIG.
The winding sub-assembly 50 is formed by bending 180 ° clockwise as shown by the arrow P2 in FIG. Then, the winding sub-assembly 50 created in this manner is connected to three adjacent teeth 16 in the same manner as in the above another example.
Assemble to.

In this case, in addition to the effects described in the features of the above embodiment, winding can be performed while being careful not to cause twisting during winding, and winding can be easily performed. .

Further, a winding sub-assembly 80 as shown in FIG. 7B is prepared in advance for the winding 17 to be wound around each set of teeth 16, and the winding sub-assembly 80 is attached to each tooth. You may implement so that it may be mounted to 16 winding winding parts 16c. At this time, first, the winding 17
Is wound around a dedicated jig (not shown) to form a winding sub-assembly 80 in which the crossover portion 17a is longer than the crossover portion 17b, as shown in FIG. 7A. Then, the crossover portion 17a is bent 180 ° in the counterclockwise direction shown by the arrow P3 in FIG. 7A, and the crossover portion 17b is bent 180 ° in the clockwise direction shown by the arrow P4 in FIG. 7A. The winding sub-assembly 80 shown in FIG. 7B is formed. Then, the winding subassembly 80 created in this manner is assembled to the three adjacent teeth 16 in the same manner as in the above another example.

In this case, since the crossover portion 17a to be arranged on the distal end side (outside) of the tooth 16 is formed longer than the crossover portion 17b to be arranged on the base end side (inside) of the tooth 16, When assembling the winding sub-assembly 80 to the three adjacent teeth 16, it is possible to prevent the crossover wire portion 17 b from having an extra length or the crossover wire portion 17 a from being tensioned. As a result, the rectangular winding 17 that has become the winding subassembly 80 can be easily mounted on the teeth 16.

In the above embodiment, the winding 17 wound around each tooth 16 is implemented by a rectangular copper wire having a rectangular cross section having a long side and a short side, but is wound around each tooth 16. The winding 17 to be formed may be implemented by a rectangular copper wire having a square cross section.

In the above embodiment, next, the winding part 16
The winding 17 wound around c is wound on one winding layer so as not to overlap with the winding 17 wound earlier on the winding winding part 16c. It may be wound on an odd number layer. For example, after winding the winding 17 on the first layer around the winding part 16c in the direction from the base end of the tooth 16 to the tip end of the tooth 16, the winding direction is turned back, that is, the tip of the tooth 16 The second layer winding 17 is wound in the direction from the portion toward the base end of the tooth 16,
Finally, the winding direction is turned back again, that is, the third-layer winding 17 is wound in the direction from the base end of the tooth 16 to the tip end of the tooth 16. In this case, in addition to the effects described in the features of the above-described embodiment, the same connection as the single-layer winding can be maintained, and the number of turns of the winding 17 wound around the teeth 16 can be increased.

In addition, the second lead-out end 17d is set as the starting end of the winding 17 to each set of teeth 16, and the first lead-out end 17c is set to the end of the winding 17 to each set of teeth 16. It may be wound. In this case, effects similar to the effects described in the features of the above embodiment can be obtained.

The number of teeth 16 may be other than nine. In this case, effects similar to the effects described in the features of the above embodiment can be obtained. In the above-described embodiment, the present invention is embodied in a rotating magnetic field type electric motor. However, the present invention is not limited to the rotating magnetic field type electric motor. May be implemented. In this case, effects similar to the effects described in the features of the above embodiment can be obtained.

Next, technical ideas other than those described in the claims which can be understood from the above embodiment and other examples will be described below together with their effects. (1) The n teeth (16) are formed into n pieces, and the n teeth (16) are divided into three sets (A, B, C) of the same number as the number of phases of the three-phase external drive power supply, and each set has a total of n. 2. The rotating field motor according to claim 1, wherein the rectangular winding (17) is continuously wound around three teeth (16) without twisting. 3.

(2) A rectangular winding (1) is wound around the teeth (16).
7), the rectangular winding (1)
7. The stator according to claim 7, wherein the stator is wound continuously without twisting two or more adjacent teeth (16).

[0050]

As described in detail above, according to the first aspect of the present invention, it is possible to simplify the winding connection process.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), a decrease in the space factor of the winding with respect to the slot due to twisting of the winding and damage to the coating of the winding can be prevented.

According to the invention described in claim 3, according to claim 1
In addition to the effects of the inventions described in (2) and (3), winding can be easily performed. According to the fourth aspect of the invention, in addition to the effects of the first to third aspects, the same connection as the single-layer winding can be maintained, and the number of turns of the winding wound around the teeth is reduced. Can be increased.

According to the fifth aspect of the present invention, winding can be easily performed. According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the rectangular winding serving as the winding sub-assembly can be easily mounted on the teeth.

[Brief description of the drawings]

FIG. 1 is a plan view of a rotating magnetic field type electric motor according to an embodiment.

FIG. 2 is a perspective view of a stator of the rotating magnetic field type electric motor.

FIG. 3 is an exploded perspective view of a main part of a stator of the rotating magnetic field type electric motor.

FIG. 4 is a plan view of another example of a winding subassembly.

FIG. 5 is a perspective view showing winding of a winding sub-assembly.

FIG. 6 is a plan view of another example of a winding subassembly.

FIG. 7 is a plan view of another example of a winding subassembly.

[Explanation of symbols]

Reference numeral 10: rotating magnetic field type motor, 11: stator, 12: rotor, 16: teeth, 17: rectangular winding, 17a, 17b
... Flat wire winding crossover, 30, 50, 80... Winding subassembly.

Continued on the front page (72) Inventor Takanori Ozawa 390 Umeda, Kosai-shi, Shizuoka Prefecture Asmo Co., Ltd. (72) Inventor Yoshito Nishikawa 390 Umeda, Kosai-shi, Shizuoka Prefecture Asmo Co., Ltd. 390 Umeda, Kosai Pref. Asmo Co., Ltd.

Claims (6)

[Claims] 1. A rotating magnetic field type comprising a stator (11) in which a rectangular winding (17) is wound around a tooth (16) and a rotor (12) arranged inside the stator (11). In the electric motor, the rectangular magnetic winding (17) is continuously wound around two or more adjacent teeth (16) without twisting. 2. A rectangular winding (1) wound around two adjacent teeth (16) wound with the same rectangular winding (17).
The rotating magnetic field type electric motor according to claim 1, wherein the crossover portions (17a, 17b) of (7) are turned to the same end side of the two teeth (16). 3. The rectangular winding (17) is made of a rectangular copper wire having a rectangular cross section having a long side surface and a short side surface, and is wound so that the long side surface contacts each tooth (16). The rotating magnetic field type electric motor according to claim 1 or 2, wherein: 4. An odd-numbered winding of the rectangular windings (17) around each of the teeth (16) while shifting the position of the rectangular winding (17) along the direction in which each of the teeth (16) extends. 4. The rotating magnetic field type electric motor according to any one of claims 3 to 3. 5. The two or more adjacent teeth (1)
6) A rectangular winding (17) is formed in advance in the winding subassembly (30, 50, 80) to be wound around the rectangular winding, and then the flat winding is formed into the winding subassembly (30, 50, 80). Line (17) is connected to two or more adjacent teeth (1
2. The device according to claim 1, wherein the device is mounted on the device.
5. The method for manufacturing a rotating magnetic field type electric motor according to any one of items 4 to 4. 6. The method for manufacturing a rotating magnetic field type electric motor according to claim 5, wherein the crossover wire portion (17b) is disposed opposite to the rotor (12) at the base end side of the teeth (16). 1
2) A method of manufacturing a rotating magnetic field type electric motor, characterized in that a crossover portion (17a) is formed longer so as to be disposed on a tip side of a tooth (16) on a side.