JP3433242B2 - Motor stator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator.

[0002]

2. Description of the Related Art Conventionally, a crossover connecting a coil wound around each tooth portion of a stator iron core of a motor to a coil wound around another tooth portion is provided above the stator iron core. It was arched so as to straddle the iron core of the stator.

[0003]

In the above connection method, the crossover wires of the coils of the respective phases intersect at the upper part of the stator iron core, and it is difficult to insulate the crossover wires in a correlated manner. It was However, in the motor of high voltage specification, the correlation insulation is required by some method, and the insulation work becomes complicated in manufacturing.

Therefore, the present invention provides a stator of a motor in which the connecting wires of the coils of each phase can be easily connected without crossing each other.

[0005]

The invention according to claim 1 is a phosphorus
A model in which multiple teeth protrude from the inner peripheral surface of the hollow core back.
In the stator of the rotor, the outer peripheral wall of the stator is radially outwardly
The wiring protrusion protruding toward the
By forming a pair of protrusions, the plurality of teeth
Of one of the three phases wrapped around one of the teeth
Wrap the coil around the other tooth of the plurality of teeth.
The transition of the one phase connecting up to the coil of the one phase
Draw a wire through the inside of the recess to the end of the one protrusion.
Hang it and bend it from the axial direction to the circumferential direction along the outer peripheral wall.
Wire the crossover wire of the other phase among the three phases to the outer peripheral wall.
When wiring along, ride on the outer periphery of the pair of protrusions.
Wire to cross over and pass the one phase in the recess.
The model is characterized by intersecting so that it does not touch the wire.
It is a stator of data. The invention of claim 2 provides the pair of protrusions.
The protrusions are L-shaped protrusions or lip-shaped
A protrusion formed in a shape of a circle.
It is a stator of the mounted motor.

[0006]

[Operation] In the stator of the motor having the above-mentioned structure, a case of connecting the crossover wires of each phase will be described.

One phase wound around one tooth (eg,
(If it is U-phase), it is wound around other teeth
The U-phase crossover wire that connects to the U-phase coil.
Through the inside of the
Bend in the circumferential direction from the other side and wire along the outer peripheral wall.
A crossover line (for example, W phase) is provided along the outer peripheral wall.
When wiring, get over the outer circumference of the pair of protrusions
Wiring for the U-phase crossover wire and the W-phase
Cross the crossover without touching it .

As a result, since the connecting wire of each phase is laid along the outer peripheral wall of the stator, the phases do not intersect with each other.

[0009]

Embodiments (First Embodiment) A motor according to a first embodiment of the present invention will be described below with reference to FIGS. This motor is a 6-slot with a 3-phase, 4-pole rotor.

FIG. 1 is a plan view of the stator 10 of the motor, and FIG. 2 is a front view of the stator 10. Six T-shaped tooth portions 12a to 12f are projected from the inner peripheral surface of the core back 14 on the ring at equal intervals. A stator iron core in which the tooth portions 12a to 12f and the core back 14 are integrated is pre-molded with a synthetic resin. When the pre-molding is performed, the wiring protrusions 16a to 16 are provided on the outer peripheral wall 11 of the stator 10 at positions corresponding to the six tooth portions 12a to 12f.
f is projected. In addition, the wiring protrusions 16a to 16f
May be formed of a spool in the case of a stator that is not premolded.

Next, referring to FIGS. 3 and 4, the wiring projection pieces 16a to f and the coils 20U (solid lines in the drawing) and the coils 20V (in the drawings) wound around the tooth portions 12a to 12f. The relationship between the dashed line) and the coil 20W (dotted line in the figure) will be described.

FIG. 3 is a development view of the outer peripheral wall 11 of the stator 10, and FIG. 4 is a plan view of the development view of FIG. In both figures, from the left, the wiring protrusions 16a, 16b, 16c,
16d, 16e, and 16f are shown.

The wiring projection 16a is a slightly inclined projection 18 which projects from the right side of the center of the tooth 12a.

The wiring protrusions 16b and 16c are composed of a pair of protrusions 18 and 18, and a recess 19 is formed between them.

The wiring projections 16d, 16e, 16f are one slightly inclined projection 18 and have teeth 12d, e, f.
It projects from the left side of the center of the.

Further, as shown in FIG. 3, each wiring projecting piece 1
The axial lengths of 6a to f have the following relationship.

(A = d) <(b = e) <(c = f) However, a, b, c, d, e, and f are wiring protrusions 16 a to.
The axial length of f is shown.

A case will be described in which the crossover wires 22U, V, W of the coils 20U, V, W are wired using the six wiring projecting pieces 16a to 16f having the above-mentioned structure.

The U-phase coil 20U is wound around the tooth portion 12a and the tooth portion 12d, the V-phase coil 20V is wound around the tooth portion 12b and the tooth portion 12e, and the W-phase coil is wound around the tooth portion 12c and the tooth portion 12f. Suppose that the coil 20W is wound.

(1) The crossover 22U from the coil 20U (solid line in the figure) is hooked on the wiring projecting piece 16a and bent from the radial direction to the circumferential direction, passes through the upper portion of the outer peripheral wall 11, and is used for wiring. The protrusion 16d for wiring passes through the outer peripheral portions of the protrusions 16b and 16c to reach the protrusion 16d for wiring, and the protrusion 16d for wiring is bent radially from the circumferential direction toward the tooth portion 20d.

(2) Coil 20V (one-dot chain line in the figure)
The connecting wire 22V from the concave portion 19b of the wiring protrusion 16b is
Then, it is hooked on the protrusion 18 and bent from the radial direction to the circumferential direction. This crossover 22V passes through the center of the outer peripheral wall 11, passes through the outer peripheral portions of the wiring protrusions 16b, 16c, and then the wiring protrusion 16
At d, the wiring projection 16d is bent in the radial direction from the circumferential direction toward the tooth portion 20d.

(3) The crossover wire 22W from the coil 20W (dotted line in the figure) is hooked on the projection 18 via the recess 19c of the wiring projecting piece 16c and bent from the radial direction to the circumferential direction. The connecting wire 22W passes through the lower portion of the outer peripheral wall 11 to reach the wiring protrusion 16f, and in the wiring protrusion 16f, is bent in the radial direction from the circumferential direction toward the tooth portion 12f.

As described above, the crossover wire 22U of the coil of each phase,
Since V and W are wired at the positions where the height of the outer peripheral wall 11 is different, they do not come into contact with each other. Also, crossovers 22U, V, W
The point where the points intersect with each other passes through the inside of the recess 19 of the wiring protrusion 16 and the outer peripheral portion of the wiring protrusion 16 and therefore does not contact (see FIG. 5). Therefore, it is not necessary to perform special insulation treatment between each phase. Furthermore, the stator 10
Since it is only necessary to provide the wiring projecting piece 16 on the outer peripheral wall 11, the cost is not increased and the manufacturing can be easily performed.

(Second Embodiment) Next, as a second embodiment, a 9-slot motor having a 3-phase, 6-pole rotor will be described with reference to FIGS. 6 to 8.

FIG. 6 is a plan view of the stator 110 after pre-molding, and shows nine tooth portions 112a to 112i.
have. Stator 1 corresponding to each tooth 112a-i
Wiring protrusions 116a to
i is provided.

FIG. 7 is a development view of the outer peripheral wall 111 of the stator 110, and FIG. 8 is a plan view of the development view of FIG. 7.

The wiring protrusion 116a has one protrusion, the wiring protrusion 116b has a pair of protrusions, and a recess 120b is provided between them. The wiring protrusion 116c has a pair of protrusions. The wiring projection 116d has a pair of projections 118 and the wiring projection 116d has a recess 120c therebetween. The wiring projection 116d has a pair of projections 118d.
18 and a recess 120e between them, and the wiring projection 11
6f has a pair of protrusions and a recess 120f therebetween,
The wiring protrusion 116g has one protrusion, and the wiring protrusion 116h has one protrusion 118.
6i has one protrusion 118.

The axial length of each wiring projection 116 has the following relationship.

(A = d = g) <(b = e = h) <(c = f = i) However, a to i represent axial lengths of the wiring protrusions 116a to 116i. There is.

The teeth 112a, 112d, 112g
The U-phase coil 120U is wound around the
Winding V-phase coil 120V around 2e and 112h, and W-phase coil 120W around teeth 112c, 112f, and 112i.
Let's wind up.

In this case, the crossovers 122U, V, W of each phase are connected.
Are wired as shown in FIGS. 7 and 8.

For example, the U-phase crossover 122U (solid line in the figure) is hooked on the wiring projection 116a and bent from the radial direction to the circumferential direction. The crossover 122U reaches the wiring protrusion 116d through the outer peripheral portions of the wiring protrusions 116b and 116c along the upper portion of the outer peripheral wall 111. Here, the tooth portion 112 is bent in the radial direction from the circumferential direction and inserted into the recess 120d.
to d. Then, again from the recess 120U to the outer peripheral wall 111.
Is routed through the wiring projections 116e and 116f, reaches the wiring projection 116g, and goes toward the tooth portion 112g.

Even in this case, since the three-phase crossover wires 122 maintain the insulation distance without coming into contact with each other, it is not necessary to perform special insulation treatment. Therefore, it is possible to meet high voltage specifications.

FIGS. 9A to 9F show the wiring protrusion 16
2A shows an example of a planar shape of the above, and FIG. 7A is a combination of the above-described slightly obliquely protruding projections 18, 18.
(B) is a combination of protrusions 18 and 18 that project straightly, and (c) is a protrusion 1 that is formed in an arc shape on the outside.
8D is a combination of 8 and 18, and in (d), the projections 18 and 18 protruding straightly are formed in a semicircular shape at the tips thereof, and (e)
Is formed by protrusions 18 and 18 protruding in an L-shape from each other, and (f) is a protrusion 18 and 18 formed in a lip shape.
It consists of

[0035]

As described above, in the stator of the motor according to the present invention, since the outer peripheral wall of the stator is used for the wiring of the crossover wire, the size of the core back is not restricted. Further, since the interphase insulation distance of the crossover wire of each phase can be sufficiently secured, it is not necessary to perform special insulation treatment. Further, since the wiring protrusion can be formed of a molded product such as a premold or a spool, the manufacturing method thereof is easy. Further, as described above, sufficient interphase insulation can be obtained, so that it is possible to meet high voltage specifications.

[Brief description of drawings]

FIG. 1 is a plan view of a stator of a motor according to a first embodiment.

FIG. 2 is a front view of the stator shown in FIG.

FIG. 3 is a development view of an outer peripheral wall of a stator.

FIG. 4 is a developed plan view of an outer peripheral wall of a stator.

FIG. 5 is an enlarged perspective view of a pair of wiring protrusions.

FIG. 6 is a plan view of a stator of a motor according to a second embodiment.

FIG. 7 is a development view of an outer peripheral wall of a stator.

FIG. 8 is a plan view of a development view of the outer peripheral wall of the stator.

9A to 9F are other examples of plan views of the wiring protrusion.

[Explanation of symbols]

10 Stator 12 teeth 14 core back 16 Wiring protrusion 18 protrusions 19 recess 20 coils 22 Crossover

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02K 3/52 H02K 3/18

Claims (2)

(57) [Claims] 1. A plurality of ring-shaped core backs are provided from the inner peripheral surface.
In a motor stator with protruding teeth, a wiring protruding radially outward from the outer peripheral wall of the stator.
By forming a recess in the projecting piece along the axial direction,
Of the three-phase winding formed on one tooth of the plurality of teeth
From one phase coil inside to the other teeth in the plurality of teeth
Connecting up to the coil of the one phase wound around the part
Pass the connecting wire of one phase through the inside of the recess and
Hook it at the end of the base and bend it from the axial direction to the circumferential direction.
Along the peripheral wall wiring, distribution and the crossover of the other phases in the three-phase along the outer peripheral wall
When you make a line, it will get over the outer circumference of the pair of protrusions.
And connect it to the connecting wire of the one phase in the recess.
Motor stator characterized by intersecting without touching . 2. The pair of protrusions project in an L-shape from each other.
The stator of the motor according to claim 1, wherein the stator is a protrusion or a protrusion formed in a lip shape .