JPH08182235A - Method for applying winding to stator - Google Patents

Abstract

PURPOSE: To effectively reduce the current loss by setting a waving winding, while stopping to a holding member, into slots of a stator core and arranging the twisted part to correspond with the coil end. CONSTITUTION: A waving winding 18a-18c comprises a continuous coil formed by bundling a plurality of enameled wires 34. The waving winding 18a is stopped to each blade 42 of an insert 40 and a twisted part 26a, formed at each intermediate coil end 24a, is located on the inside of the blade 42 with the position and shape thereof being sustained. When a punch 44 is introduced into the insert 40, the waving winding 18a is inverted in shape and set in a predetermined slot 22 of a stator core 16 and the twisted part 26a is set in a slot 22 corresponding to the coil end 24a. Similarly, the waving windings 18b, 18c are set sequentially in other slots 22 through the insert 40. With such structure, current density of the stator is made uniform and current loss is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator winding assembling method for assembling a corrugated winding in a slot of a stator core.

[0002]

2. Description of the Related Art For example, a motor used in an electric vehicle is generally provided with a stator core (stator core) provided with windings corresponding to a predetermined number of phases and a plurality of permanent magnets provided on an outer peripheral surface. And a rotor disposed rotatably in the stator core.

This type of stator core is usually constructed by integrally bonding a plurality of laminated steel plates, and a plurality of strands, for example, a plurality of strands, are provided in a plurality of slots provided on the inner peripheral surface of the stator core. A corrugated winding, which is a continuous coil formed by bundling enameled wires, is provided.

[0004]

By the way, generally, in a transformer, when an alternating current passes through a plurality of conductors, an induced voltage is generated by a leakage magnetic flux, the current density becomes uneven depending on the position of the wire, and the resistance increases. It is known that current loss increases.

On the other hand, the above-mentioned motor is similar to the transformer in that a large current flows and a thin bundled wire is used, and this transformer has a commercial frequency (50H).
z, 60Hz), but 900H at an alternating frequency
It has been pointed out that there is a problem that z (at 6000 rpm) is more likely to be affected by the leakage magnetic flux than the transformer.

The present invention is intended to solve this kind of problem, and provides a method of assembling a stator winding, which can make current density uniform and effectively prevent current loss. To aim.

[0007]

In order to achieve the above-mentioned object, the present invention provides a corrugated winding in which a plurality of strands are bundled in parallel and at least a part of which has a twist-shaped portion for dislocation. The step of obtaining, the step of retaining the shape of the twisted shape portion to lock the corrugated winding on the winding holding member, and the step of locking the corrugated winding on the winding holding member, Inserting the corrugated winding into the slot of the stator core through the insertion member, and arranging the twisted portion corresponding to the coil end.

[0008]

In the stator winding assembling method according to the present invention, the waveform winding is retained by the winding holding member while maintaining the shape of the twisted portion, and the waveform winding is inserted through the winding insertion member. The winding is inserted in the slot of the stator core. Therefore, the shape of the twist-shaped portion is not collapsed and the position of the twist-shaped portion is not displaced, and the twist-shaped portion can be reliably arranged corresponding to the coil end. Therefore, the dislocation is effectively performed, the current density of the stator is made uniform, and the current loss is reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stator winding assembling method according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a motor to which the stator winding assembling method according to this embodiment is applied. The motor 10 includes a three-phase stator 12 and a rotor 14 rotatably arranged in the three-phase stator 12.

The three-phase stator 12 includes a stator core 16
And three-phase wave windings 18a to 18c arranged on the stator core 16. The stator core 16 is formed by integrally laminating a plurality of laminated steel plates 20, and in order to arrange the corrugated windings 18a to 18c on the inner peripheral surface of the stator core 16, a plurality of, for example, , 54
Slots 22 are separated from each other by a predetermined angle and arranged in parallel in the axial direction (direction of arrow A).

The corrugated windings 18a to 18c are composed of a continuous coil in which a plurality of enameled wires (strands) 34 are bundled, and an intermediate coil end 24a to be led out between the slots 22.
Twisted portions 26a to 26c for dislocation are provided on 24c.

The rotor 14 includes a shaft 28 and a yoke 3
0 and a plurality of permanent magnets 32 arranged on the outer peripheral surface of the yoke 30 at a predetermined angle apart from each other.

Next, referring to the flow chart shown in FIG. 2, the process according to the first embodiment for assembling the corrugated windings 18a to 18c in the three-phase stator 12 in the motor 10 thus constructed will be described. explain. The corrugated windings 18a to 18c are assembled in the same manner,
The waveform winding 18a will be described in detail below, and description of the other waveform windings 18b and 18c will be omitted.

First, a plurality of enameled wires 34 are bundled in parallel (step S1). Then, the bundled enameled wire 34 is used to form, for example, a three-turn corrugated winding 18a (step S2). That is, the stator core 1
6 is provided with a slot 22 of the 54, as shown in FIG. 3, waveform windings 18a has a coil end 24a ₁ ～24A ₉ of 9 per turn on the side corresponding to the inner curve portion, The twisted portion 26a is formed by being inverted by 180 ° before and after each intermediate coil end 24a ₅ (step S
3).

Specifically, as shown in FIG. 3, a plurality of first winding columns 36 for alignment and second winding columns 38 for reversing alignment are alternately provided, and the bundled enamel wire 34 is formed. The wave winding 18a is formed by being wound around the first and second winding columns 36 and 38 (see the solid line in FIG. 3).

Next, in the corrugated winding 18a, the portion wound around the second winding strut 38 is inverted by 180 ° toward the portion wound around the first winding strut 36 (see the broken line in FIG. 3). As a result, the waveform winding 18a is inverted by 180 ° before and after the coil end 24a _{5 in} the middle of each turn (see section A and section B in FIG. 3), and each coil end 24a
dislocation for twist-shaped portion 26a is formed on a _5.

Therefore, as shown in FIG.
a is each blade of the insert jig 40 (winding holding member)
It is locked by 42 (step S4). At this time, the twist-shaped portion 26a formed on each intermediate coil end 24a of the corrugated winding 18a is arranged inside the one blade 42 and its position and shape are maintained. Furthermore, when the punch (winding insertion member) 44 that constitutes the insert jig 40 is introduced into the insert jig 40, the waveform winding 1
8a is arranged in a predetermined slot 22 of the stator core 16 by reversing the waveform shape thereof, and also has a twisted shape portion 26.
a is arranged between each slot 22 corresponding to the coil end 24a (see step S5 and FIG. 5).

Similarly, the corrugated windings 18b and 18c are sequentially arranged in the other slots 22 of the stator core 16 via the insert jig 40. This allows the waveform winding 1
8a-18c are arrange | positioned at the stator core 16 and the three-phase stator 12 is comprised (refer FIG. 1).

In this case, in the first embodiment, after the corrugated winding 18a is formed by the plurality of enameled wires 34, the corrugated winding 18a is arranged in the slot 22 of the stator core 16 via the insert jig 40. At this time, the twist-shaped portion 26a formed on the coil end 24a in the middle of the corrugated winding 18a is arranged inside the blade 42 of the insert jig 40 (see FIG. 4).

Therefore, since the twisted portion 26a is securely held by the first blade 42 and the blades 42 on both sides adjacent to the first blade 42, the position of the twisted portion 26a may be displaced or the twisted portion 26a may be displaced. The shape does not collapse. As a result, the effect that the twisted portion 26a can be reliably arranged in correspondence with the coil end 24a is obtained.

Further, since the twisted portion 26a is reliably formed on the intermediate coil end 24a, the alignment order of the enamel wire 34 is reversed before and after the intermediate coil end 24a, and the dislocation is effectively performed. Therefore, the induced voltage due to the leakage magnetic flux in the slot 22 is canceled to make the current density uniform, the current loss is effectively reduced, and the motor 10 that can be used efficiently can be obtained.

Next, the waveform winding 18a according to the second embodiment.
The process of assembling (the waveform windings 18b and 18c are similar and omitted) will be schematically described with reference to the flowchart shown in FIG.

First, as shown in FIG. 7A, after a plurality of enameled wires 34 are bundled in parallel corresponding to 3 turns (step S1a), the central coil end portion of each turn of the bundled enameled wire 34 is formed. Are twisted by 180 ° to form twisted portions 50a to 50c (see step S2a and FIG. 7B). Then, each twisted shape part 50a-50c
The corrugated winding 18a is formed such that is the inner curved portion (see step S3a and FIG. 7C).

Similar to the first embodiment, the corrugated winding 18a is fixed to each of the blades 42 of the insert jig 40 (step S4a) through the punch 44 in a predetermined slot of the stator core 16. 22 and the twist-shaped portions 50a to 50c are formed on the coil ends 24a.
Are arranged between the slots 22 in correspondence with (step S5
a).

Therefore, in the second embodiment, the twist-shaped portion 5
0a to 50c can be surely arranged corresponding to the coil end 24a, the dislocation can be effectively performed, and the loss of current can be effectively reduced. Therefore, the same effect as that of the first embodiment can be obtained. It will be possible.

Further, in the first and second embodiments, a plurality of enameled wires 34 bundled in parallel are integrally formed by 180 °.
Although the twisted shape portions 26a to 26c and 50a to 50c are formed by twisting, in No. 3 in the third embodiment shown in FIG. 1
As shown in to 9, using the waveform winding 18a consisting of nine enameled wire 34, and the enameled wire 34 is reversed one by one at each coil end 24a ₁ ～24A ₉ of this waveform winding 18a . Specifically, as shown in FIG.
o. Only the first enameled wire 34 is moved from the frontmost row to the last row by the coil end 24a ₁ . As a result, the waveform winding 18a is evenly twisted once per turn as a whole.

[0028] Moreover, when the twisted triplicate waveform winding 18a for each turn, as shown in FIG. 10, in the coil end 24a ₁ ~24a _9, between the coil ends 24a ₂ and 24a ₅ and The coil end 24a ₈ and the coil end 24a ₂ of the second turn may be integrally twisted by 180 °. Further, as shown in FIG. 11, each coil end 2
It is also possible to twist all 4a _{1 to} 24a ₉ and twist 9 times for each turn.

[0029]

According to the stator winding assembling method of the present invention, the following effects and advantages can be obtained.

Since the corrugated winding is inserted into the slot of the stator core while maintaining the shape of the twist-shaped portion, the shape of the twist-shaped portion is not broken or the position of the twist-shaped portion is not displaced. Therefore, the twisted portion can be surely arranged corresponding to the coil end, the dislocation is effectively performed, the current density of the stator is made uniform, and the current loss is reduced. This makes it possible to provide a motor that can be used efficiently.

[Brief description of drawings]

FIG. 1 is an exploded explanatory view showing a schematic configuration of a motor to which a stator winding assembling method according to the present invention is applied.

FIG. 2 is a flowchart for explaining a winding assembling method according to the first embodiment.

FIG. 3 is an explanatory diagram for forming a waveform winding.

FIG. 4 is a perspective explanatory view of an insert jig, a wave winding, and a stator core.

FIG. 5 is an explanatory diagram when the corrugated winding is inserted into the stator core by the insert jig.

FIG. 6 is a flowchart for explaining a winding assembling method according to a second embodiment.

7A and 7B are explanatory views of forming a corrugated winding in the second embodiment, FIG. 7A is an explanatory view of a state in which enameled wires are arranged in parallel, and FIG. 7B is a state in which a bundle of enameled wires is twisted. And FIG. 7C is an explanatory view of a state in which a corrugated winding is formed by a bundle of twisted enameled wires.

FIG. 8 is an explanatory diagram for uniformly twisting the corrugated winding.

FIG. 9 is a partial perspective explanatory view of the waveform winding of FIG.

FIG. 10 is an explanatory diagram when the waveform winding is twisted three times in one turn.

FIG. 11 is an explanatory diagram when the waveform winding is twisted 9 times per turn.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motor 12 ... Three-phase stator 14 ... Rotor 16 ... Stator core 18a-18c ... Waveform winding 22 ... Slot 24a-24c ... Coil end 26a-26c
… Twisted portion 34… Enameled wire 40… Insert jig 50a-50c… Twisted portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoaki Momose 1-10-1 Shin-Sayama, Sayama-shi, Saitama Honda Engineering Co., Ltd.

Claims (1)

[Claims] 1. A step of obtaining a corrugated winding in which a plurality of strands are bundled in parallel and at least a part of which has a twist-shaped portion for dislocation, and the corrugated winding is maintained while maintaining the shape of the twist-shaped portion. A step of locking the wire to the winding holding member, and a state in which the corrugated winding is locked to the winding holding member,
A step of inserting the corrugated winding into a slot of a stator core via a winding insertion member and disposing the twisted shape portion in correspondence with a coil end; .