JP2016015859A - Winding method of wire of dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for winding a plurality of wires so as not to crossover, at a relatively low cost.SOLUTION: A method of winding a plurality of wires around a plurality of magnetic poles projecting radially inward from the inner peripheral surface of a substantially cylindrical stator of a dynamo-electric machine includes a step for winding a first wire 61 a predetermined number of turns, by reciprocating a nozzle relatively, at least once, from the radial outside end 4a of a first magnetic pole 4-1, between the radial outside end 4a and a position 4c at a predetermined interval L from the radial inside end 4b in the radial outside direction, while feeding the first wire 61 from the nozzle of a winding device, and a second winding step for winding a second wire 62 a predetermined number of turns so as to be superimposed on the first wire 61, by reciprocating the nozzle relatively, at least once, from the radial outside end 4a of the first magnetic pole 4-1 toward the radial inside direction R, while feeding the second wire 62 from the nozzle.

Description

  The present invention relates to a method for winding an electric wire of a rotating electrical machine.

  Rotating electric machines such as motors include an inner rotor type and an outer rotor type. In the former case, the stator has a substantially cylindrical shape, and a plurality of teeth protruding radially inward are provided on the inner peripheral surface thereof at regular intervals in the circumferential direction. A substantially ring-shaped stator cover is assembled to the stator, and an electric wire is wound around a magnetic pole portion composed of the stator cover and the teeth.

  Factors that determine the characteristics of the rotating electrical machine include the conductor cross-sectional area and the number of turns of the electric wire. Depending on the required conductor cross-sectional area of the wire, the wire may be relatively thick. A relatively thick electric wire is difficult to wind, and even if it can be wound, the space factor may decrease. Therefore, a plurality of thin electric wires are bundled and wound at the same time so as to be easily wound so as to have the same cross-sectional area as one relatively thick electric wire.

  One example thereof will be described with reference to FIGS. The stator 101 includes a substantially cylindrical stator core 102. On the inner peripheral surface of the stator core 102, there are provided a plurality of teeth 102a that protrude radially inward at regular intervals in the circumferential direction. A substantially ring-shaped stator cover 103 is assembled to the stator core 102. On the inner peripheral surface of the stator cover 103, a plurality of protrusions 103a projecting radially inward at regular intervals in the circumferential direction are provided so as to correspond to the teeth 102a. Each of the teeth 102a and the protrusion 103a of the stator cover 103 around the teeth 102a constitute a magnetic pole 104.

  Then, the two electric wires 106a and 106b are wound around the magnetic pole portions 104 at the same time by using the nozzle 105 of the winding device (not shown) that can bundle and feed the two electric wires 106a and 106b at the same time. .

  When the two electric wires 106 a and 106 b are bundled and wound in this manner, the two wound electric wires 106 a and 106 b intersect at the coil end as shown as the intersection 107. There are two intersections 107 per turn. Then, the dimension of a coil end becomes large, the position of the electric wires 106a and 106b becomes unstable, winding-up will arise, and a space factor may fall. In addition, since the two electric wires 106a and 106b come into contact with each other at the intersecting portion 107, the damage to the insulating film of the electric wires increases, and the quality may be deteriorated.

  Patent Document 1 describes a winding device for suppressing occurrence of a portion where wires cross each other when a plurality of wires are bundled and wound.

JP 2006-81372 A

  Since the winding apparatus described in Patent Document 1 includes a dedicated mechanism for preventing crossing, the winding apparatus itself is relatively complicated and large in size, and becomes a relatively expensive facility. There is a probability.

  An object of the present invention is to provide a technology with a relatively low cost for winding a plurality of electric wires so as to eliminate such inconvenience and prevent crossing.

  In order to achieve the above object, a method of winding a plurality of electric wires around each of a plurality of magnetic pole portions protruding radially inward from an inner peripheral surface of a substantially cylindrical stator of a rotating electrical machine according to the present invention, While feeding out the first electric wire from the nozzle of the winding device, the diameter is between the radially outer end of the first magnetic pole part and a position spaced apart from the radially inner end to the radially outer direction. A first winding step of winding the first wire by a predetermined number of turns by relatively reciprocating the nozzle from the outer end in the direction, while feeding the second wire from the nozzle The first winding wound in the first winding step by reciprocating the nozzle relatively at least once in a radial inner direction from a radially outer end of the first magnetic pole portion. So that it overlaps the wire Said second knots of the wire and a second spirally wound step of the predetermined number of turns spirally wound.

  ADVANTAGE OF THE INVENTION According to this invention, the technique with comparatively low cost for winding a some electric wire so that a crossing does not arise is provided.

(A) It is a fragmentary perspective view of a stator. (B) It is a partial expansion perspective view of a stator. It is a partial top view of a stator. FIG. 3 is a partial cross-sectional view taken along line AA in FIG. 2. It is explanatory drawing which shows an example of arrangement | positioning of a crossover part. It is a perspective view of the stator which shows an example of arrangement | positioning of a crossover part. It is explanatory drawing which shows the comparative example of arrangement | positioning of a crossover part. It is explanatory drawing which shows another example of arrangement | positioning of a crossover part. It is explanatory drawing which shows another comparative example of arrangement | positioning of a crossover part. It is a perspective view of the stator which concerns on another embodiment. (A) It is a fragmentary perspective view of the conventional stator. (B) It is a partial expansion perspective view of the conventional stator. It is a partial top view of the conventional stator.

[First Embodiment]
The first embodiment will be described with reference to FIGS. 1 and 2. A stator 1 of a rotating electrical machine has a substantially cylindrical stator core 2. On the inner peripheral surface of the stator core 2, a plurality of teeth 2 a are provided that protrude radially inward at regular intervals in the circumferential direction. A substantially ring-shaped stator cover 3 is assembled to the axial end portion of the stator 1. On the inner peripheral surface of the stator cover 3, a plurality of protrusions 3a protruding inward in the radial direction at regular intervals in the circumferential direction are provided so as to correspond to the teeth 2a. Each of the teeth 2a and the protrusion 3a of the stator cover 3 around the teeth 2a constitute a magnetic pole 4. The nozzle 5 of the winding device (not shown) is configured so that one electric wire 6 can be fed out at a time.

  A method of winding a plurality of electric wires 6 around each magnetic pole portion 4 will be described with reference to FIGS. These figures assume that the number of magnetic poles is 6, the number of phases is 3, the number of wires wound around each magnetic pole is 2, and the number of turns is 21. These two electric wires are in phase. The above assumption is only an example.

  As shown in FIG. 4, the magnetic pole portions 4-1 and 4-2 that face each other across the stator shaft center S constitute a first phase. Similarly, the opposing magnetic pole portions 4-3 and 4-4 constitute a second phase, and the opposing magnetic pole portions 4-5 and 4-6 constitute a third phase.

  First, while feeding the first electric wire 61 of the first phase from the nozzle 5 and rotating the nozzle 5 relatively around the first magnetic pole part 4-1, the outer side in the radial direction of the first magnetic pole part 4-1. The nozzle 5 is reciprocated once relatively from the radially outer end 4a between the end 4a and the position 4c spaced from the radially inner end 4b by a predetermined distance L in the radially outer direction. This reciprocation is indicated by an arrow Y1. As a result, the first wire 61 is wound for 21 turns. Specifically, 11 turns are wound while the nozzle 5 is relatively moved from the radially outer end 4a toward the position 4c. Subsequently, the remaining 10 turns are wound while the nozzle 5 is relatively moved from the position 4c toward the radially outer end 4a. The remaining 10 turns are wound in a stack on top of the 11 turns already wound.

  Next, while the first electric wire 61 is continuously fed out from the nozzle 5, the stator 1 is moved from the first magnetic pole part 4-1 to the second magnetic pole part 4-2 constituting the same phase as the first magnetic pole part. The nozzle 5 is relatively moved along one circumferential direction C of the axial end 1a. Thereby, the crossover part 61a of the 1st electric wire 61 is formed.

  Similarly to the first magnetic pole part 4-1, the first electric wire 61 is wound around the second magnetic pole part 4-2.

  Subsequently, while feeding the second electric wire 62 of the first phase from the nozzle 5 and rotating the nozzle 5 relatively around the second magnetic pole part 4-2, the radial direction of the second magnetic pole part 4-2 The nozzle is reciprocated twice relatively from the outer end toward the radially inner direction. These two reciprocations are indicated by an arrow Y2. As a result, the second wire 62 is similarly wound for 21 turns so as to overlap the already wound first wire 61. Specifically, in the first round trip, the turn is wound for 7 turns and the return is wound for 6 turns. Further, in the second round trip, the turn is wound for 4 turns and the return is wound for 4 turns.

  Subsequently, while feeding the second electric wire 62 from the nozzle 5, the nozzle 5 is relatively moved along the circumferential direction C from the second magnetic pole part 4-2 to the first magnetic pole part 4-1. Move. Thereby, the crossover portion 62a of the second electric wire 62 is formed.

  Similarly to the second magnetic pole part 4-2, the second electric wire 62 is wound around the first magnetic pole part 4-1.

  In this manner, two in-phase electric wires 61 and 62 are wound around each of the first magnetic pole part 4-1 and the second magnetic pole part 4-2 constituting the first phase. Similarly, two in-phase wires are wound around the magnetic pole portions 4-3 and 4-4 constituting the second phase and the magnetic pole portions 4-5 and 4-6 constituting the third phase, respectively. The crossover line portions are also formed.

  According to the above configuration, since the plurality of in-phase electric wires are not bundled and wound at the same time, but wound one by one at a time, the wound plurality of electric wires intersect each other. Can be prevented. Therefore, winding with higher alignment is possible. As a result, it is possible to prevent damage to the insulating film of the electric wire due to the crossing of the electric wires. Furthermore, the amount of copper can be improved.

  Although a winding device has been developed with a dedicated mechanism to prevent crossing even when a plurality of wires are bundled and wound, the winding device itself is relatively complex and large, and There is a probability that it will be a relatively expensive facility. According to the present invention, there is no need for a dedicated mechanism for preventing crossing, and the stator can be manufactured using a relatively inexpensive and simple winding device that has been conventionally used.

  Further, according to the above embodiment, the region where the electric wire is not wound is intentionally provided over the predetermined interval L from the radially inner end portion 4b toward the outside, and the radially outward direction of the magnetic pole portion 4 is directed from the radially outer side. Thus, the number of layers of electric wires stacked is reduced. Therefore, taking advantage of the structural feature of the stator that the interval between two adjacent magnetic pole portions increases from the inner side to the outer side in the radial direction, the space between the magnetic pole portions is reduced while preventing the nozzle from interfering with the magnetic pole portion. Electric wires can be wound efficiently.

  Furthermore, according to said form, the number of a crossover part can be equalized. Specifically, as shown in FIG. 4, the number of crossover portions is three over the entire circumference of the axial end portion of the stator, and is uniform over the entire circumference. For this reason, the strength of the structure (not shown) such as a pin for fixing the connecting wire portion provided at the axial end of the stator (particularly, the wire to be wound includes the connecting wire portion). Therefore, the structure needs to have a certain strength.) Can also be made uniform over the entire circumference. The strength required for the structure and the space occupied by the structure can be reduced, and the stator can be downsized.

  On the other hand, when two electric wires are bundled and wound at the same time, as shown in FIG. 6, the number of crossover portions is not uniform over the entire circumference of the axial end portion of the stator. Four crossovers are provided at the most places and two at the least places. Therefore, the strength of the structure is not uniform over the entire circumference.

  According to the above embodiment, the strength of the structure can be made uniform over the entire circumference as compared with the example of FIG.

  FIG. 7 is an explanatory view similar to FIG. 4 when the number of magnetic poles is 10 and the number of phases is 5. FIG. The magnetic pole portions 4-11 and 4-12 facing each other across the stator shaft center S constitute a first phase. Similarly, the opposing magnetic pole parts 4-13 and 4-14 constitute a second phase, and the opposing magnetic pole parts 4-15 and 4-16 constitute a third phase, The magnetic pole parts 4-17 and 4-18 are included in the fourth phase, and the opposing magnetic pole parts 4-19 and 4-20 are included in the fifth phase. In the magnetic pole parts 4-11 and 4-12 constituting the first phase, the first electric wire 63 and the second electric wire 64 of the same phase are wound by the same method as described above. Yes. Moreover, the connecting wire part 63a of the 1st electric wire 63 and the connecting wire part 64a of the 2nd electric wire 64 are formed. Similarly, two electric wires are wound around the magnetic pole portion constituting the other phase, and a crossover portion is also formed.

  As shown in the figure, the number of crossover portions is five over the entire circumference of the axial end portion of the stator, and is uniform over the entire circumference. On the other hand, when two electric wires are bundled and wound at the same time, as shown in FIG. 8, the number of crossover portions is not uniform over the entire circumference of the axial end portion of the stator. Even when the number of magnetic poles is 10 and the number of phases is 5, the strength of the structure can be made uniform over the entire circumference. Further, the axial dimension of the stator can be reduced.

[Other forms]
Unlike the above embodiment, a printed circuit board can be used without forming a crossover portion. For example, when the number of magnetic poles is 10 and the number of phases is 5, first, two wires are wound around the magnetic pole portion 4-11 one by one by the method shown in FIG. Then, another two electric wires are wound around the magnetic pole part 4-12 one by one without forming the crossover part. And the ring which provided the two electric wires wound by the 1st magnetic pole part 4-11 and the two electric wires wound by the 2nd magnetic pole part 4-12 at the axial direction edge part of the stator 1 Connected to the printed circuit board 7 (FIG. 9). As a result, the two electric wires wound around the first magnetic pole portion 4-11 and the two electric wires wound around the second magnetic pole portion 4-12 via the printed pattern on the printed circuit board 7. Each can also be connected. The same applies to the other phases.

  In the above, specific embodiments in which a plurality of electric wires are wound have been specifically described. However, the present invention is not limited to such an embodiment, and all changes and modifications apparent to those skilled in the art are included in the technical scope of the present invention. For example, the number of electric wires is not limited to two and may be three or more. The third electric wire is wound so as to overlap the already wound second electric wire. The fourth and subsequent wires are wound in the same manner. Further, the present invention can be applied to a stator having any number of magnetic poles and phases. Furthermore, the number of reciprocations of the nozzle when winding each electric wire can be arbitrarily changed according to the specifications of the rotating electrical machine.

1 Stator 1a Axial end

2 Stator core 2a Teeth

3 Stator cover 3a Protrusion

4 magnetic pole part 4a radial outer end part 4b radial inner end part 4c position 4-1 first magnetic pole part 4-2 second magnetic pole part 4-3 to 4-6 magnetic pole part 4-11 to 4-20 magnetic pole part

5 nozzles

6 Wire 61 First wire 61a Crossover portion 62 Second wire 62a Crossover portion 63 First wire 63a Crossover portion 64 Second wire 64a Crossover portion

7 Printed circuit board

101 Stator 102 Stator core 102a Teeth 103 Stator cover 103a Protrusion 104 Magnetic pole 105 Nozzle 106a Electric wire 106b Electric wire 107 Intersection

O Radially outer direction R Radially inner direction L Predetermined interval C One circumferential direction S Axis Y1 Arrow Y2 Arrow

Claims (3)

In a method of winding a plurality of electric wires around each of a plurality of magnetic pole portions protruding radially inward from an inner peripheral surface of a substantially cylindrical stator of a rotating electrical machine,
While feeding out the first electric wire from the nozzle of the winding device, the diameter is between the radially outer end of the first magnetic pole part and a position spaced apart from the radially inner end to the radially outer direction. A first winding step of winding the first electric wire a predetermined number of turns by relatively reciprocating the nozzle from the outer end in the direction;
While the second electric wire is fed out from the nozzle, the nozzle is relatively reciprocated from the radially outer end of the first magnetic pole portion toward the radially inner direction, whereby the first winding A second winding step of winding the second electric wire for the predetermined number of turns so as to overlap the first electric wire wound in a step, and a method of winding a plurality of electric wires . Between the first winding step and the second winding step,
The circumferential direction of the axial end portion of the stator from the first magnetic pole portion toward the second magnetic pole portion constituting the same phase as the first magnetic pole portion while continuously feeding the first electric wire from the nozzle A first connecting wire portion forming step for forming a connecting wire portion of the first electric wire by relatively moving the nozzle in one direction;
By moving the second wire in the circumferential direction from the second magnetic pole part toward the first magnetic pole part while feeding the second electric wire from the nozzle, the second electric wire is moved. The method for winding a plurality of electric wires according to claim 1, further comprising: a second connecting wire portion forming step of forming a connecting wire portion of the electric wires. The stator by which the said electric wire is wound by the method of winding the several electric wire of Claim 1 or 2.

Images