JPH0528061B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing saddle-shaped coils used in electrical equipment.

[Conventional technology]

Figures 8 to 11 are diagrams for explaining the conventional saddle-shaped coil manufacturing method, Figure 8 is a developed winding diagram of a single-layer concentric winding coil with a 3-phase 4-pole single Y connection, and Figure 9 is a fixed winding diagram. FIG. 3 is a cross-sectional view of the child assembly. In the figure, 1 is a stator, 1a is an inner diameter part of the stator, 1b is an outer diameter part of the stator, 2 and 3 are four saddle-shaped single coils 2a, 2b, 2c, 2d and 3a, 3
Similarly, 4 is a flat coil made up of four flat single coils 4a, 4b, 4c, and 4d assembled to the stator 1.

FIG. 10 is an explanatory diagram of the coil end shape of the saddle-shaped coil 2 shown in FIG. 9, viewed from the X-X direction, and shows the stator 1
Straight portions of saddle-shaped single coils 2a, 2b, 2c, and 2d installed in slots #1 to #16,
The coil end portions rising from this straight portion both have an inclination corresponding to the slot straddling angle α ₁ ° to α ₄ °, and are formed radially with respect to the axial center.

Next, the conventional manufacturing process of such a saddle-shaped single coil (2a in FIG. 10 is taken as an example) will be explained with reference to FIGS. 11a, b, and c. In the figure, 5 is a coil winding die, 6 is a wire, 7 is a presser arm for holding the wire 6, 8 is a component of the coil winding machine, and is a turntable to which the presser arm 7 is attached. .

First, the coil winding form 5 is attached to the turntable 8, and the wire 6 is pulled out from a drum (not shown). With the wire 6 attached to the coil winding form 5, the arm 7 holds the wire 6. (Figure 11a).

Next, centering on the X1 point of the coil winding die 5,
The turntable 8 is rotated 90 degrees to bend the wire 6 (FIG. 11b). And coil winding form 5
Rotate the turntable 8 180° + centering on the Y point of
α ₁ ° rotation (Fig. 11c), and then coil winding form 5
Rotate 90° around point X2 of (Figure 11a)
).

As is clear from the figures, the way the wire 6 is wound when the turntable 8 is rotated 90 degrees from FIG. 11a to FIG. 11b or from FIG. 11c to FIG. 11a is as follows. It is a flat-wise volume, and the first
When rotating 180° + α ₁ ° from Figure 1b to Figure 11c, the winding method is edgewise winding. In this case, flatwise winding and edgewise winding can be interchanged by changing the way the strands 6 are applied to the coil winding form 5. Then, each time the turntable 8 is rotated, the presser tool, which functions similarly to the presser arm 7, is attached and removed in the states shown in FIGS. Change the way the winding form 5 is fixed.

By repeating the above steps, the saddle-shaped single coil 2
a is formed. Then, the saddle-shaped single coils 2b, 2 are formed by repeating the same procedure.
c and 2d, as shown in Fig. 10, stator 1 throttles #4-#13, #3-#14, #2-#15,
#1 to #16, and the assembly with one set of saddle-shaped coils 2 is completed.

[Problem that the invention seeks to solve]

The conventional saddle-shaped coil manufacturing method is configured as described above, so to form one turn of a single saddle-shaped coil, the turntable is rotated a total of six times in two directions, the X direction and the Y direction. I have to let it happen. Furthermore, when performing this rotation, in order to prevent springback of the strands and to fix the coil winding form, it is necessary to repeatedly attach and detach arms and tools that hold down the strands. However, there was a problem in that it required a lot of man-hours and effort.

This invention was made to solve the above-mentioned problems, and by reviewing the formation process of the saddle-shaped single coil that constitutes the saddle-shaped coil, it is possible to save a large amount of man-hours and labor that was previously required. It is an object of the present invention to provide a saddle-shaped coil manufacturing method that can significantly reduce costs.

[Means for solving problems]

The saddle-shaped coil manufacturing method according to the present invention is configured as follows.

That is, in the first step, a coil winding machine rotates the wire in one direction to form a flat coil having a flat bottom surface and a flat top surface. At this time, the longitudinal dimension of the flat coil is formed at a predetermined inclination angle so that it increases from the bottom side to the top side, and the width direction dimension of the flat coil decreases from the bottom side to the top side. Form it into

Next, in the second step, the raising (more precisely, lowering) of the strands forming the coil end portion of this flat coil is sequentially started from the bottom side.
That is, from the bottom side to the top side, the strands are sequentially bent at a predetermined angle toward the bottom side to form a saddle-shaped single coil.

Then, in the third and final step, a plurality of saddle-shaped single coils formed in this way are arranged,
These are installed into slots provided in the stator to complete the assembly of the saddle-shaped coil.

[Effect]

The flat coil according to the present invention can be formed by simply rotating the strands in one direction in the first step, so the work is very simple. Then, in the second step, the strands of the coil end portion of this flat coil are sequentially arranged at a predetermined angle (usually 90°).
When bent, the length of the top surface, which is the outer diameter side with a larger bending radius, is longer than the length of the bottom surface part, which is the inner diameter side with a smaller bending radius, in the longitudinal direction. will line up neatly.

Also, regarding the widthwise dimension of the flat coil, a predetermined inclination angle, that is, a slot straddling angle, is formed such that it decreases from the bottom to the top, so that the coil end portion is raised in the second step. Even after this, the above-mentioned slot straddling angle is maintained as it is for the straight portion installed in the slot of the stator.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a concentric flat coil formed in the first step, in which two parallel strands 9 are wound in one direction, i.e. at the center point X, using a coil winding machine (not shown). It is formed by rotating in the direction of the arrow around the center. In addition, S, E
indicate the winding start side and the winding end side of the wire 9, respectively. Also, unlike the strand 6 in the case of Fig. 11,
The reason why the strands 9 are composed of two parallel wires is simply based on the requirements of the specifications and has no special meaning.

As shown in Fig. 2, the longitudinal dimension of this flat coil extends over a height H and increases at an inclination angle θ° from the bottom surface (dimension L ₁ ) side to the top surface (dimension L ₂ ) side. It is formed. Regarding the width direction dimension, as shown in Fig. 3, at an inclination angle α ₁ °, from the bottom surface (dimension S ₁ ) side to the top surface (dimension S ₂ )
It is formed to become smaller as it goes to the side.

Next, a second step of bending the flat coil and the coil end portion will be explained. FIG. 4 is a front view showing the shape of the wooden mold used to make this bending.
It consists of a wooden mold 10A provided with grooves #1 to #16 corresponding to grooves #1 to #16, and a wooden mold 10B for forming the bending arm of the coil end portion.

Then, install the flat coils into the grooves #4 and #13, and as shown in Figure 5 (side view of Figure 4), first,
Bend the wire 9 on the bottom 90 degrees and perform the first turn bending process. Next, bend the second turn 1
This bending is performed in a state where the wire is aligned with the turn strand 9, and thereafter, this bending is sequentially performed in the same manner until reaching the upper surface. Note that although it is usually desirable to perform this bending process using a dedicated automatic machine from the viewpoint of reducing labor, it may also be performed by a worker using a wooden hammer or the like.

By repeating these steps, the bending of the strands up to the upper surface is completed, and a saddle-shaped unit coil 11a is formed, as shown in FIG. As is clear from this figure, the end surface Z of the coil end portion is approximately parallel to the flat surfaces F of the top and bottom surfaces, and is neatly aligned. This is because the inclination angle θ° in Fig. 2 was set to an appropriate value in advance in the first step (of course, the dimensions L ₁ and L ₂ were determined, not the inclination angle θ°). ) The saddle-shaped single coil 11a formed through the first and second steps as described above, and the saddle-shaped single coils 11b, 11c, and 11d formed in the same manner,
In the third step, slot #4 of stator 1 ~
It is installed in #13, #3 to #14, #2 to #15, and #1 to #16, and the assembly of the saddle-shaped coil 11 is completed. This state is shown in FIG. As is clear from the figure, each saddle-shaped single coil 11a, 11b, 11
Unlike the case in Fig. 11, the rising portions on both sides of c and 11d are parallel to the central axis O-O, but the straight portions (dotted line portions) have slot straddling angles α ₁ °, α ₂ °, α ₃ ° and α ₄ ° are maintained.
Therefore, there will be no problem during actual use.

In addition, in the above embodiment, the case of a three-phase, four-pole, single Y-connected concentric saddle-shaped coil of a rotating electric device was explained, but the manufacturing method according to the present invention can also be applied to cases with a number of poles and connections other than those described above. It goes without saying that it is possible.

In addition, for linear equipment, the slot straddle angle α ₁ ° to α ₄ ° is usually zero, that is, the saddle-shaped single coils 11a, 11b, 11c, 11 in FIG.
The opposing straight portions (dotted line portions) on both sides of d are parallel to each other. Therefore, in this case, by forming a flat coil with dimensions S ₁ and S ₂ shown in FIG. 3 being the same, the same effect as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, a flat coil is formed by rotating a wire in only one direction, and a saddle-shaped single coil is formed by bending the coil end portion of this flat coil. Therefore, compared to conventional manufacturing methods, the working time is significantly shortened, and the number of man-hours and labor can be significantly reduced.

[Brief explanation of drawings]

1 to 7 are explanatory diagrams of a saddle-shaped coil manufacturing method according to an embodiment of the present invention, in which FIG. 1 is a plan view of a flat coil, and FIGS.
Figure 4 is a front view of a wooden mold used for bending the coil end of a saddle-shaped single coil, and Figures 5 and 6 are the wooden mold shown in Figure 4. Fig. 7 is a front view showing the saddle-shaped coil assembled to the stator, Fig. 8 is an explanatory diagram showing the bending process using
The figure is a wiring diagram showing an example of the connection of electrical equipment using saddle-shaped coils, Figure 9 is a cross-sectional view of the stator assembly, and Figure 1
Fig. 0 is a front view showing a saddle-shaped coil assembled to a stator by a conventional saddle-shaped coil manufacturing method, and Fig. 11 is an explanatory diagram showing a bending process of a saddle-shaped single coil by a conventional saddle-shaped coil manufacturing method. It is. 1 is a stator, 9 is a wire, 11 is a saddle-shaped coil, 1
1a, 11b, 11c, 11d are saddle-shaped single coils, _L1 , _L2 are longitudinal dimensions, _S1 , _S2 are width dimensions, _α1 ° to _α4 ° and θ are predetermined inclination angles, #1 to #16
is the slot.

Claims (1)

[Claims] 1 By rotating the strands in one direction with a coil winding machine, a flat coil having a flat bottom and top surface is formed, and the longitudinal dimension of the flat coil extends from the bottom side to the top side at a predetermined inclination angle. A first step of forming the strands forming the coil end portion of the flat coil so that the width direction dimension becomes smaller as the slot straddle angle increases from the bottom side to the top side;
a second step of forming a saddle-shaped single coil by sequentially bending a predetermined angle toward the bottom side from the bottom side to the top side;
and a third step of mounting the plurality of saddle-shaped single coils formed in the second step into slots provided in a stator.