JP2011234516A - Insulator of stator and method of leading out winding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator of a stator that can make a flange part of the insulator thinner and enhance a space factor of the winding, and provide a method of leading out a winding.SOLUTION: An insulator 11 comprises: an opening 15 capable of leading out a winding 21, which is wound around a winding drum 12 in a winding direction, at a coil end side of an outer diameter side flange 14; and a protrusion 16 for tying the winding 21 led out from the opening 15 to the both end edges 15a of the opening 15. The winding 21 can be led out from the opening 15 in winding direction even when the winding 21 is tied to the protrusion 16, bend in an axial direction of a stator, and led out after the winding 21 is once led out from the opening 15, or when the winding 21 is led outward from the opening 15 in a radial direction of the stator.

Description

  The present invention relates to a stator insulator and a winding drawing method in a rotating electrical machine such as a motor or a generator.

  In Patent Literature 1, by providing a guide groove for winding introduction on the side surface of the flange portion of the insulator attached to the teeth portion of the stator, the twisted bent portion at the beginning of winding is released in the stator radial direction, A technique that enables winding of a winding also immediately above the first turn is disclosed.

Japanese Patent No. 3786931

  In the technique of Patent Document 1, the thickness dimension of the flange portion of the insulator is increased due to the setting of the guide groove for winding introduction on the side surface. For this reason, there is a problem in that the winding space in the slot between the teeth portions of the stator is reduced, and the space factor of the winding is lowered.

  Therefore, the present invention can neatly wind the winding around the winding body without requiring a guide groove for winding introduction on the side surface of the flange of the insulator, and can reduce the thickness of the flange. It is an object of the present invention to provide a stator insulator and a winding drawing method capable of increasing the space factor.

  In the insulator of the stator of the present invention, at least one coil end side of the inner diameter side flange portion and the outer diameter side flange portion of both ends of the winding drum portion attached to the tooth portion is wound around the winding drum portion. It has an opening that can be pulled out in the winding direction. The opening is provided with protrusions for binding the winding drawn from the opening on both ends or one end of the opening. The winding wound around the winding body part is once pulled out in the winding direction from the opening, and then entangled with the protrusion and bent in the stator axial direction, or the winding is pulled out from the opening in the winding direction, It is pulled out in the stator radial direction as it is.

  The winding start and end of the winding wound around the winding drum are drawn out from the opening and then bent around the protrusion and bent in the stator axial direction, or pulled out from the opening in the stator radial direction. In any case, it is possible to pull out from the opening in the winding direction. For this reason, it is possible to wind the winding in an orderly manner without causing twisting around the winding body, and it is possible to reduce the thickness of the collar portion and narrow the winding space in the slot between the teeth portions. In addition, the space factor of the winding can be increased.

The perspective view which shows 1st Embodiment of the insulator which concerns on this invention. The front view of the insulator of 1st Embodiment. Sectional drawing which follows the AA line of FIG. Sectional drawing which follows the BB line of FIG. The front view which shows the winding state of the coil | winding in 1st Embodiment by the 1st layer (a) and the 2nd layer (b). Sectional drawing which expands and shows the C range part of FIG. The perspective view of the stator using the insulator of 1st Embodiment. The front view of the stator shown in FIG. Sectional drawing which follows the DD line | wire of FIG. The front view similar to FIG. 8 which shows 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)

  1 and 2 show a first embodiment of an insulator according to the present invention. The insulator 11 shown in FIG. 1 is a two-piece piece that is fitted from the front-rear direction (axial direction of the stator 1) to the tooth portion 3 protruding from the inner peripheral side of the yoke portion 2 of the stator 1 shown in FIG. One is shown.

  The stator 1 shown in FIG. 5 is configured by connecting a plurality of core segments in an annular shape. Therefore, in FIG. 5, one core segment is shown as the stator 1 for convenience.

  The insulator 11 is made of an appropriate electrically insulating material such as a synthetic resin, and has a winding drum portion 12 fitted into the tooth portion 3, an inner diameter side flange portion 13 and an outer diameter side flange portion 14 at both ends of the winding drum portion 12. It has.

  The winding drum portion 12 includes a coil end side wall 12a where the winding 21 starts and ends, and a slot side wall 12b between the teeth portions, and is substantially rectangular according to the cross-sectional shape of the teeth portion 3. As a cross section. The corner portion where the side walls 12a and 12b are connected is formed with roundness (R).

  The inner diameter side flange portion 13 projects substantially horizontally in the radial direction of the winding drum portion 12 to the end of the winding drum portion 12 on the stator center side, insulates the winding 21 and the terminal flange 3a of the teeth portion 3 from each other. The winding position on the side of the teeth portion of the wire 21 is defined.

  The outer diameter side flange 14 projects substantially horizontally in the radial direction of the winding drum portion 12 to the end of the winding drum portion 12 on the yoke portion side to insulate the winding 21 and the yoke portion 2 from each other. The winding position on the yoke side is defined.

  At least one of the inner diameter side flange 13 and the outer diameter side flange 14 is provided with a winding start portion 21 a and a winding end portion 21 b of the winding 21 wound around the winding body portion 12, and the winding direction of the winding 21. An opening 15 is provided for drawing out.

  In the present embodiment, the opening 15 is provided in the outer diameter side flange 14, and both the winding start portion 12 a and the winding end portion 12 b are pulled out from one opening 15.

  The opening 15 is formed in the central part of the outer diameter side flange 14 as a depth from the flange end to the side wall 12a on the coil end side.

  In this embodiment, a rectangular wire having a width dimension w and a thickness dimension t is used as the winding 21 as shown in FIG. Therefore, the opening 15 is an opening that does not interfere strongly with the opening edge 15a at both ends when the winding 21 passes obliquely through the opening 15 with its width w when the winding 21 is pulled obliquely in the winding direction. The width (lateral width dimension) is Lo.

  On the outer side of the opening edge 15 a of the opening 15, a projection 16 is formed on a substantially half of the outer diameter side flange 14 on the terminal side (tip side) to tie the winding 21 drawn from the opening 15. It is set up.

  On the outer surface of the outer diameter side flange 14, a rectangular groove 17 is formed along the standing base of the protrusion 16 for fitting the winding 21 bent around the protrusion 16.

  As shown in FIG. 3, the groove 17 is formed from substantially half of the depth of the protrusion 16 to the buttock terminal, and has an inclined surface that is inclined downward toward the buttock terminal side. .

  In the present embodiment, one protrusion 16A and the groove 17A of the opening edge 15a are the winding start side of the winding 21, and the other protrusion 16B and the groove 17B are the winding end side of the winding 21.

  The groove 17A on the winding start side is provided with a notch 17a at a depth corresponding to the thickness of the winding 21 at the tip. As a result, at the start of winding of the winding 21, the winding start portion 21a is engaged with the notch 17a and fitted into the groove 17A, thereby increasing the effect of preventing the winding 21 from starting loose.

  A protruding piece 18 protrudes toward the inside of the opening 15 at the lower end portion on the front end side of the winding start side projection 16A. The projecting piece 18 engages with the side edge of the winding end portion 21b when the winding end portion 21b of the winding 21 is brought into sliding contact with the lower edge of the projection 16A and pulled out obliquely from the opening 15 in the winding direction. Thus, it functions as a stopper that restricts the movement of the opening 15 in the back direction.

  On the other hand, the inner diameter side flange 13 is provided with a collapse receiving portion 19 in the central part facing the opening 15 of the outer diameter side flange 14 to escape the second and subsequent layers of the winding 21. is there.

  In the present embodiment, the unwinding receiving portion 19 is formed as a concave portion extending from the collar end to the side wall 12a on the coil end side, but this may be an opening.

  Here, in the present embodiment, the opening width Lo of the opening 15 is set as Lo ≦ Td in relation to the thickness (lateral width dimension) Td of the winding body 12.

Further, the opening edge 15a of the opening 15, as drawer angle theta ₂ of the winding 21 as shown in FIG. 4 is 30 ° or less, the lower edges R1, the upper edge ne small radius of curvature than the lower edge R2 is formed as a composite R whose tip edge is R3 having a smaller radius of curvature than that.

  Further, the height dimension H and the thickness dimension T of the protrusion 16 are set as H ≧ w / 2 and T ≧ t in the relationship between the width dimension w and the thickness dimension t of the winding 21.

In addition, the groove 17 is formed at an inclination angle of a downward gradient θ ₁ <30 ° toward the flange end side, and the lateral width dimension L is L ≧ in relation to the thickness dimension t of the winding 21. It is set as t.

  Further, the recess depth D of the unwinding receiving portion 19 is set to be equal to or greater than the bulging amount of the unwinding winding 21, and the lateral width dimension Ld is set as Ld ≦ Td in relation to the lateral width dimension Td of the winding body portion 12. ing.

  5 to 9 schematically show a state where the winding 21 is wound around the tooth portion 3 of the stator 1 by using the insulator 11 of the present embodiment.

  In the concentrated winding coil, when the winding 21 is wound, a lane change portion that is wound obliquely as shown in FIG. 5 occurs when the winding moves to the next turn. In the lane change portion, the windings 21 of each layer intersect and are wound so that gaps and collapses are likely to occur. To achieve a high space factor, as shown in FIG. It is preferable to arrange a lane change part on the side.

  5A shows the first layer of the winding 21, and FIG. 5B shows the second layer. On the side wall 12a on the coil end side of the winding body 12 of the insulator 11, lane change guide protrusions 12c are provided at a plurality of locations on both sides of the side wall 12a across the corners connected to the slot side wall 12b. The lane change of the winding 21 is made orderly on the end side.

  In this embodiment, as shown in FIGS. 7 and 8, the winding start portion 21 a and the winding end portion 21 b of the winding 21 are once drawn obliquely in the winding direction from the opening 15 of the outer diameter side flange 14. After that, it is wound around the protrusions 16A and 16B, bent at a substantially right angle, and pulled out in the stator axial direction. Of course, the winding start portion 21a and the winding end portion 21b may be pulled out outward in the stator radial direction as shown by a chain line in FIG. 8 without being entangled with the protrusions 16A and 16B.

  If the winding start portion 21a and the winding end portion 21b are pulled out in the stator axial direction, they can be connected to the connection terminals of the power distribution component at the shortest distance, so that the rotating electrical machine can be reduced in size and cost. Further, if the winding start portion 21a and the winding end portion 21b are drawn out to the outside in the stator radial direction, both of them can be arranged on the same circumference, and the connection workability can be improved.

  As described above, in the present embodiment, the winding start and the winding end of the winding 21 wound around the winding body 12 of the insulator 11 are once drawn from the opening 15 and then entangled with the protrusions 16A and 16B. Therefore, it is possible to pull out from the opening 15 in the winding direction of the winding 21 regardless of whether it is bent and pulled out in the stator axial direction or pulled out from the opening 15 in the stator radial direction.

  For this reason, it is possible to wind the windings 21 in an orderly manner without causing twisting around the winding body 12. And since it is not necessary to provide the guide groove for winding introduction like the patent document 1 in the side surface of the collar parts 13 and 14 of the insulator 11, the thickness of the collar parts 13 and 14 can be made thin. . As a result, the effective winding width of the winding drum portion 12 can be increased, the winding space in the slot between the tooth portions 3 and 3 is not narrowed, and the space factor of the winding 21 is increased to reduce the size of the rotating electrical machine. And higher output can be realized.

  Here, even when a flat wire is used as the winding 21 as in the present embodiment, the winding 21 is pulled out obliquely in the winding direction from the opening 15. Also, the winding 21 is not twisted and can be wound in an orderly manner.

  In particular, as described above, when the winding 21 is once pulled out from the opening 15 in the winding direction, and then entangled with the protrusions 16A and 16B and bent in the stator axis direction, the protrusions 16A and 16B are obtained even if they are rectangular wires. Therefore, it is possible to eliminate the occurrence of twist in the bent portion and to avoid damage to the insulating coating.

  Further, the winding start portion 21A and the winding end portion 21B that are tangled with the protrusions 16A and 16B and bent in the stator axial direction are fitted in the grooves 17A and 17B along the bases of the protrusions 16A and 16B. Coil loosening due to springback can be prevented.

Here, in the present embodiment, the opening width Lo of the opening 15 is set to Lo ≦ Ld in relation to the thickness (lateral width dimension) Td of the winding body 12. Therefore, the base portion (root portion) of the opening edge 15a is brought as close as possible to the side wall 12b on the slot side, and the pressing force acting on the opening edge 15a when the winding 21 is pulled out is connected to the highly rigid side walls 12a and 12b. It can be borne by the corner portion, the root strength of the outer diameter side flange 14 can be sufficiently secured, and the thickness of the outer diameter side flange 14 can be made as thin as possible.

Further, the opening edge 15a of the opening 15, the lower edge R1, an upper edge R2, a composite R of the tip edge R3, so that the drawer angle theta ₂ of the flat wire (winding) 21 is 30 ° or less. For this reason, the general-purpose rectangular wire 21 can sufficiently secure the flexibility of the insulating film with respect to edgewise bending with an inclination angle of 30 ° or less, and the bulge of the bent portion in the lead-out portion is also small. The flat wire 21 can be pulled out in the winding direction without reducing the volume factor. Moreover, since the opening edge 15a formed of the composite R does not have a sharp edge, the insulating coating is not damaged even if the flat wire 21 slides on the opening edge 15a.

  Further, the height dimension H and the thickness dimension T of the protrusion 16 are set such that H ≧ w / 2 and T ≧ t in the relationship between the width dimension w and the thickness dimension t of the flat wire (winding) 21. For this reason, if the height H of the protrusion 16 is more than half of the flat wire width w, it is possible to prevent the tangled and flatwise bent flat wire 21 from being inclined with respect to the protrusion 16 and coming off from the protrusion 16. Moreover, since the flat wire 21 is flexible even if it is bent by 180 degrees with respect to the radius of curvature greater than its thickness, the flat wire 21 is flat with the protrusion 16 as a fulcrum if T ≧ t. It is possible to secure the radius of curvature of the square wire 21 that has been bent and prevent damage to the insulating coating.

Furthermore, since the groove 17 has a downward inclination angle θ ₁ <30 ° toward the butt end, the flexibility of the insulating coating against edgewise bending of the flat wire 21 at an inclination angle of 30 ° or less is ensured. Thus, damage to the insulating film can be prevented. Moreover, since the width L of the groove 17 is L ≧ t in relation to the thickness t of the flat wire 21, the flat wire 21 can be lightly slidably fitted into the groove 17. Damage prevention and crack prevention of the insulator 11 can be performed.

  On the other hand, when the rectangular wire (winding) 21 is lane-changed and concentratedly wound on the coil end side, as shown schematically in FIG. Unwinding inevitably occurs in the rectangular wires 21 in the second and third layers. Due to this collapse, as shown in FIG. 6, for example, the inner side flange 13 is formed by the pressing load that the flat wire 21 in the second layer receives from the flat wire 21 in the third layer as shown by the arrow a in FIG. There is a possibility of strong interference. This strong interference causes stress concentration at the root portion of the inner diameter side flange portion 13 with the winding drum portion 12.

  In the present embodiment, the inner diameter side flange 13 is provided with a collapse receiving portion 19 for releasing the collapse of the flat wire 21 described above. For this reason, strong interference with the inner diameter side flange 13 due to the collapse of the flat wire 21 is avoided by the collapse receiving portion 19, and the strength of the root portion of the inner diameter side flange 13 is sufficiently secured. It becomes possible to make the thickness of the collar part 13 as thin as possible.

In addition, by setting the depth D of the collapse receiving part 19 to be equal to or greater than the bulging amount of the collapsed flat wire 21, it is possible to reliably avoid the interference of the broken flat wire 21. Since the flat wire 21 is collapsed only on the coil end side having the lane change portion, the horizontal width dimension Ld of the roll collapse receiving portion 19 is expressed by Ld ≦ Td in relation to the horizontal width dimension Td of the winding drum portion 12. By doing so, the function of escaping the collapse can be sufficiently exhibited.
(Second Embodiment)

FIG. 10 shows a second embodiment of the present invention. In the first embodiment, an opening 15 is provided on the coil end side of the outer diameter side flange 14 of the insulator 11, and the winding start portion 2 of the winding 21 is provided.
1a and the winding end portion 21b are drawn out from one opening 15 in the winding direction. However, in this embodiment, the opening 15 is also provided on the inner diameter side flange 13, and the winding is performed from one opening 15. The starting portion and the winding end portion are pulled out from the other opening 15 in the winding direction.

  In the example shown in FIG. 10, the opening 15 provided in the inner diameter side flange 13 is used for drawing out the winding start portion 21a, and the opening 15 provided in the outer diameter side flange 14 is used for drawing out the winding end portion 21b. Yes.

  In each of the openings 15 and 15, a protrusion 16 for entwining the drawn winding wire 21 on one end outer side of the opening edge 15a, and a base part thereof are entangled with the protrusion 16 and bent in the stator axial direction. And a groove 17 for fitting the coil 21 drawn out.

  Since the structure of the opening part 15, the protrusion 16, and the groove | channel 17 is the same as that of 1st Embodiment, the overlapping description is abbreviate | omitted.

  According to the present embodiment, the effect of improving the space factor of the flat wire (winding) 21 can be obtained as in the first embodiment, and the openings 15 of the inner diameter side flange 13 and the outer diameter side flange 14 can be obtained. , 15 can be easily adapted to the specifications for drawing the flat wire 21 toward the inside and outside in the stator radial direction.

  In addition, although each embodiment has shown the case where a flat wire is used as the winding 21, it can also be applied to a concentrated winding coil using a round wire.

DESCRIPTION OF SYMBOLS 1 ... Stator 2 ... Yoke part 3 ... Teeth part 11 ... Insulator 12 ... Winding trunk | drum 13 ... Inner diameter side collar part (buttock part)
14 ... Outer diameter side buttock (buttock)
DESCRIPTION OF SYMBOLS 15 ... Opening part 15a ... Opening edge 16 ... Protrusion 17 ... Groove 19 ... Unwinding receiving part 21 ... Flat wire (winding)

Claims (11)

A winding drum portion to be attached to the teeth portion of the stator;
An inner diameter side flange and an outer diameter side that project radially from both ends of the winding body, border the winding and the yoke portion and the teeth end of the stator, and define the stator radial direction position of the winding A buttock, and
At least one coil end side of the inner diameter side collar part and the outer diameter side collar part, an opening for drawing out the winding wound around the winding body part in a winding direction;
An insulator for a stator, comprising: a protrusion projecting outward at both ends or one end of the opening, and tangling the winding drawn from the opening.   2. The stator insulator according to claim 1, further comprising a groove for fitting the winding wound around the protrusion along the standing base of the protrusion. 3.   The length of the winding used is a flat wire, where the thickness dimension is t, the width dimension is w, and the lateral width dimension of the groove is L, L ≧ t is set. The stator insulator described in 1. 4. The stator insulator according to claim 2, wherein the groove is provided with an inclination of a downward gradient θ ₁ <30 ° toward a distal end side of the flange portion.   The winding used is a flat wire, wherein Lo ≦ Td is set when Lo is the width of the opening and Td is the width of the winding body. The stator insulator according to any one of the above.   The winding to be used is a flat wire, and the opening is provided in one of the inner diameter side collar part or the outer diameter side collar part, and the part of the winding is provided in a part corresponding to the opening part of the other collar part. The stator insulator according to any one of claims 1 to 5, further comprising an unwinding receiving portion for releasing unwinding.   7. The stator insulator according to claim 6, wherein a depth dimension of the unwinding receiving portion is set to be equal to or greater than an amount of swelling of the unwinding.   8. The stator insulator according to claim 6, wherein Ld ≦ Td is set, where Ld is a lateral width dimension of the unwinding receiving portion and Td is a lateral width dimension of the winding body portion. 9.   When the winding to be used is a rectangular wire, the thickness dimension is t, the width dimension is w, the height dimension of the protrusion is H, and the thickness dimension is T, H ≧ w / 2, T ≧ The stator insulator according to any one of claims 1 to 8, wherein t is set to t. Winding used is a flat wire, as drawer angle theta ₂ of the winding drawn out by sliding contact becomes 30 ° or less to both end edges of the opening, the end edges of the opening, the lower edge 10. The method according to any one of claims 1 to 9, wherein R1 is formed of a composite R of R1, an upper edge having a smaller radius of curvature than the lower edge, R2, and a leading edge having an even smaller radius of curvature than the upper edge. The stator insulator described in 1. An insulator is attached to the teeth portion of the stator, and the winding wound around the winding drum portion is passed through at least one of the inner diameter side flange portion and the outer diameter side flange portion at both ends of the winding drum portion on the coil end side. The method of pulling out
At least one of the inner diameter side collar part and the outer diameter side collar part is provided with an opening capable of drawing the winding in the winding direction,
Providing protrusions for binding the winding drawn from the opening at both ends or one end of the opening,
The winding wound around the winding body is once pulled out in the winding direction from the opening, and then tangled with the protrusion and pulled out in the stator axial direction, or the winding is wound in the winding direction from the opening. A stator winding drawing method, wherein the winding is drawn in the radial direction of the stator.

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