JP5497344B2 - Rotating armature, rotating electric machine, and method of manufacturing rotating armature - Google Patents

Description

  The present invention relates to a rotary armature obtained by winding a winding around teeth of an armature core, a rotary electric machine having the rotary armature, and a method of manufacturing the rotary armature.

  In the rotating armature, a plurality of windings are formed by winding a conductive wire for each predetermined tooth of the armature core, and the rotating armature rotates based on power feeding from the commutator to each winding. Such a rotary armature employs a winding mode in which adjacent windings have overlapping portions in the circumferential direction (in this case, also in the axial direction), as shown in Patent Document 1, for example. In particular, the deviation of the center of gravity tends to increase from the center of rotation, and the rotation balance tends to deteriorate, which leads to an increase in vibration during rotation.

  For this reason, adjustments have been made so that the weight balance is improved in the subsequent process by performing a positive correction in which a correction material is attached to the rotary armature or a negative correction in which the armature core is cut. It was. However, it requires a separate post-process for attaching correction materials and cutting the armature core, and prevents an increase in the number of parts for the correction materials and scattering of the correction materials, as well as a dedicated tool for cutting the core. It was not a preferable response.

  Therefore, as in the rotary armature disclosed in Patent Document 1, the above-described balance correction is performed by adjusting the number of turns of the winding wound around a predetermined tooth to improve the weight balance. A post-process can be made unnecessary.

Japanese Patent Publication No. 7-34630

  However, in the response of changing the number of turns for each winding to improve the weight balance of the rotating armature, the magnetic unbalance occurs due to the difference in the number of turns for each winding. The rotating armature vibrates during rotation due to the balance. Therefore, measures to change the number of turns were not a good idea.

  The present invention has been made to solve the above-described problems, and its object is to provide a rotating armature that has a small deviation in the center of gravity and excellent rotational balance, and a small amount of vibration during rotation. An object of the present invention is to provide an electric machine and a method of manufacturing the rotating armature.

In order to solve the above-mentioned problems, the invention according to claim 1 is configured in such a manner that a plurality of windings are wound around a tooth of an armature core and adjacent windings are overlapped in the circumferential direction. and a rotating armature, the teeth of the armature core, an outer layer teeth which branches one inner layer teeth part extending in a radial direction, into two from the radially outer end of the inner teeth in the circumferential direction Of the plurality of windings, and a winding that does not overlap in the same direction in the circumferential direction is wound around each of the inner layer tooth portions as a first winding in the circumferential direction. Every other remaining winding that does not overlap is wound as a second winding across a pair of the outer layer teeth facing each other between adjacent teeth, and the first and second windings are positioned at 180 ° facing positions. Sequentially moves to the tooth part to be wound that is the farthest away position except for It is configured by winding Te as its gist the.

In the present invention, each tooth of the armature core, one inner layer teeth part extending in a radial direction, and the outer tooth portion branching from the radially outer end of its circumferentially bifurcated formed, a plurality of Among the windings, every other winding in the circumferential direction that does not overlap in the same direction (first winding) is wound around the inner layer tooth portion, and the remaining windings that do not overlap in the circumferential direction (the first winding). The second winding) is wound over a pair of outer layer teeth facing each other between adjacent teeth. Further, when winding the first and second windings, the windings are respectively wound while sequentially shifting to the winding target tooth portion at the most distant position excluding the 180 ° facing position. Therefore, each winding can be configured uniformly in any of the circumferential directions (rotation directions), and further, the winding configuration is biased by continuation of the winding order of each winding (such as a variation in the weight of the conductor). Can be dispersed in the circumferential direction, so that it is possible to configure a rotating armature excellent in rotational balance with a small deviation in the center of gravity.

The gist of the invention described in claim 2 is that, in the rotary armature according to claim 1, the windings are wound so as not to overlap in the axial direction.
In this invention, since each winding is wound so as not to overlap in the axial direction, the amount of winding protrusion (coil end height) from both axial end faces of the armature core can be reduced, and the short axis of the rotating armature As a result, it can contribute to the downsizing of the rotating electrical machine using the same in the axial direction.

A third aspect of the present invention is a rotating electric machine including the rotating armature according to the first or second aspect.
According to the present invention, since the rotary armature having a small rotational balance with a small center of gravity deviation is provided, a low-vibration rotary electric machine can be provided.

The invention according to claim 4 is a method of manufacturing a rotary armature in which a plurality of windings are wound around a tooth of an armature core and adjacent windings are wound in a circumferential direction. there, the teeth of the armature core, one inner layer teeth part extending in a radial direction, and the outer tooth portion branching from the radially outer end of the inner teeth circumferentially bifurcated formed In addition, among the plurality of windings, every other winding in the circumferential direction that does not overlap in the same direction is wound around each inner layer tooth portion as a first winding, and the remaining one that does not overlap in the circumferential direction. Every other winding is wound as a second winding across the pair of outer layer teeth facing each other between adjacent teeth, and the first and second windings are the most separated positions except the 180 ° facing position. The winding is sequentially shifted to the teeth section to be wound at It is referred to as the gist thereof.

In the present invention, the same effect as that of the first aspect of the invention can be obtained.
The gist of a fifth aspect of the present invention is that the windings are wound so as not to overlap in the axial direction in the method of manufacturing a rotary armature according to the fourth aspect.

  In this invention, the same effect as that of the invention of claim 2 described above can be obtained.

  According to the present invention, it is possible to provide a rotating armature having a small center-of-gravity deviation, excellent rotation balance, and small vibration during rotation, a rotating electric machine having the rotating armature, and a method of manufacturing the rotating armature. it can.

It is a schematic block diagram of the DC motor in this embodiment. (A) (b) is explanatory drawing for demonstrating the winding aspect of an inner layer winding, (c) (d) is explanatory drawing for demonstrating the winding aspect of an outer layer winding, (e) ( (f) is explanatory drawing for demonstrating the connection aspect of a short circuit wire.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a DC motor 11 as a rotating electrical machine of this embodiment. In the DC motor 11 of this embodiment, four (four magnetic poles) magnets 13 are fixed to the inner peripheral surface of a cylindrical yoke housing 12, and a rotary armature 14 is rotatably accommodated inside the magnet 13. It is configured.

  The rotating armature 14 includes a rotating shaft 15, an armature core 16 fixed to the rotating shaft 15, ten (10 magnetic poles) windings 17 wound around the armature core 16, and a rotating shaft 15. And a commutator 18 connected to a terminal line of each winding 17.

  More specifically, the armature core 16 is formed by laminating a plurality of magnetic metal plates (magnetic powder may be formed), and extends radially outward from the outer peripheral surface of the annular core back 20 at equal angular intervals (72 5 teeth 21 are provided at intervals, and the rotation shaft 15 is fitted into the center of the core back 20 and fixed to the rotation shaft 15 so as to be integrally rotatable. Each tooth 21 is line-symmetric with respect to the center line in the width direction (circumferential center line), and is configured as one inner layer tooth portion 21a from the core back 20 to the radial intermediate position, from the intermediate position. The radially outer portion is configured as outer layer tooth portions 21b and 21c that bifurcate in the circumferential direction. Extending portions 21d extending in an arc shape so as to be close to each other are formed at the radially outer end portions of the outer layer tooth portions 21b and 21c branched from the same tooth 21, and each extending portion 21d is provided in the circumferential direction or the like. It is located at an angular interval and faces the magnet 13 on its radially outer surface.

  In each inner layer tooth portion 21a, five of the ten windings 17 described above are wound as inner layer windings 17a, and the wound inner layer windings 17a are arranged at intervals of 72 °. Yes. The remaining five teeth are wound around the outer layer teeth 21b and 21c as outer layer windings 17b such that the adjacent teeth 21 that face each other in the circumferential direction are paired and straddle each other. The wound outer layer windings 17b are arranged at intermediate positions of the inner layer windings 17a, and are also arranged at intervals of 72 °. Thus, the ten windings 17 composed of the inner layer windings 17a and the outer layer windings 17b are alternately arranged at equiangular intervals of 36 °, and each of them is configured in an angular range of about 60 ° (overlapping in the circumferential direction). And are wound around the armature core 16 without overlapping portions in the axial direction.

  Incidentally, at the center of the bottom of the slot formed between the outer layer tooth portions 21b and 21c (the branch portion of the outer layer tooth portions 21b and 21c), the winding direction of the outer layer winding 17b is followed (two-dot chain line in FIG. 1). A triangular guide convex portion 21e having a slope is formed. The guide protrusion 21e is provided to guide the outer layer winding 17b so that it can be wound in an aligned state without breaking the arrangement, and to prevent the winding shape of the outer layer winding 17b from becoming unbalanced. Yes.

  As shown in FIG. 2, ten segments 25 are fixed to the commutator 18 provided in the rotary armature 14 while being insulated from each other at equal angular intervals (36 ° intervals) on the outer peripheral surface thereof. Each segment 25 is connected to a terminal line of each corresponding winding 17. In addition, the segments 25 are connected to each other by five short-circuit lines 26 so that the segments having an interval of 180 ° have the same potential.

Next, how the winding 17 is wound around the armature core 16 and how the winding 17 is connected to the commutator 18 will be described.
Here, as shown in FIG. 2, there are a total of ten outer layer tooth portions 21b and 21c branched from the five teeth 21, and in order from the outer layer tooth portion 21b on the counterclockwise side of the predetermined tooth 21 in the clockwise direction. Teeth numbers “1” to “10” are attached. In the five inner layer tooth portions 21a, the tooth numbers are “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, “9”, “10”, respectively. Also, segment numbers “1” to “10” are assigned in the clockwise direction from the segment 25 of the commutator 18 located between the outer layer teeth portions 21b and 21c (inner layer teeth portion 21a) of the teeth numbers “1” and “2”. I will do it. In the present embodiment, the outer layer tooth portion 21b with the tooth number “1” and the segment 25 with the segment number “1” are set to be shifted by a predetermined angle (for example, 27 °).

  First, as shown in FIGS. 2A and 2B, each inner layer winding 17a is wound around each inner layer tooth portion 21a. That is, the conducting wire 17x hooked to the segment “1” is wound around the inner layer tooth portion 21a of the teeth numbers “3” and “4” a predetermined number of times to form the inner layer winding 17a, and is hooked to the segment number “7”. It is done. The conducting wire 17x hooked to the segment “7” is wound around the inner layer tooth portion 21a of the tooth numbers “9” and “10” a predetermined number of times to form the inner layer winding 17a and is hooked to the segment number “3”. The conducting wire 17x hooked to the segment “3” is wound around the inner layer tooth portion 21a having the teeth numbers “5” and “6” a predetermined number of times to form the inner layer winding 17a and is hooked to the segment number “9”. Thereafter, in the same manner, the inner layer winding 17a is wound around the inner layer tooth portions 21a of the teeth numbers “1” and “2” and the teeth numbers “7” and “8”, and the conductor 17x is again applied to the segment number “1”. The winding is stopped and the five inner layer windings 17a are wound around the inner layer tooth portion 21a. Each inner layer winding 17a is configured by one conductive wire 17x using an odd segment 25 having a segment number.

  Next, as shown in FIGS. 2C and 2D, each outer layer winding 17b is wound around each outer layer tooth portion 21b, 21c. That is, the conducting wire 17x hooked to the segment “2” is wound around the outer layer tooth portions 21b and 21c of the teeth numbers “5” and “4” a predetermined number of times to form the outer layer winding 17b, and the segment number “8” is formed. It is latched. The conductor 17x hooked to the segment “8” is wound around the outer layer teeth portions 21b and 21c having the teeth numbers “1” and “10” a predetermined number of times to form the outer layer winding 17b, and is hooked to the segment number “4”. It is done. The conductor 17x hooked to the segment “4” is wound around the outer layer teeth portions 21b and 21c of the teeth numbers “7” and “6” a predetermined number of times to form the outer layer winding 17b, and is hooked to the segment number “10”. It is done. Thereafter, in the same manner, the outer layer windings 17b are wound around the outer layer tooth portions 21b and 21c of the teeth numbers “3” and “2” and the teeth numbers “9” and “8”, respectively, and the conductor 17x is assigned to the segment number “2”. It is hooked again and the five outer layer windings 17b are wound around the outer layer tooth portions 21b and 21c. Each outer layer winding 17b is configured by one conductive wire 17x using even-numbered segments 25 of segment numbers.

  As shown in FIGS. 2E and 2F, segments “1” and “6”, segments “2” and “7”, segments “3” and “8”, segments “4”, “ The segments 25 of “9”, “5”, and “10” are connected to each other by the five conductive wires 17x (short-circuit wires 26) to have the same potential. In this manner, the winding 17 is wound around the armature core 16 and connected to the commutator 18 to constitute the rotary armature 14 of the present embodiment.

  The yoke housing 12 is provided with a power supply brush (not shown) to which DC power is supplied from the outside. The power supply brush is a set of plus and minus brushes, and one or two brushes are arranged at any one of the magnetic pole center positions (90 ° intervals) of the four magnets 13. The commutator 18 (segment 25) of the child 14 is pressed and contacted. A DC power source is supplied from the power supply brush to each winding 17 through the commutator 18 to generate a magnetic field for rotation in the rotating armature 14 so that the armature 14 rotates.

Next, characteristic effects of the present embodiment will be described.
(1) In the present embodiment, the teeth 21 of the armature core 16 are formed with an inner layer tooth portion 21a and outer layer teeth portions 21b and 21c that bifurcate in the circumferential direction. In the inner layer winding 17a that does not overlap in the same direction every other circumferential direction, the other outer layer winding 17b that does not overlap in the circumferential direction is wound between the adjacent teeth 21. Is wound across a pair of outer layer tooth portions 21b, 21c facing each other. Further, when winding the windings 17a and 17b, the windings 17a and 17b are respectively wound while sequentially shifting to the winding-target teeth portions 21a to 21c other than the 180 ° facing position. Yes. Accordingly, the windings 17a and 17b can be equally configured in any of the circumferential directions (rotation directions), and the windings 17a and 17b can be biased in a continuous manner by devising the winding order of the windings 17a and 17b. Since it is possible to disperse in the circumferential direction (such as the deviation of the weight change of the conductor 17x), it is possible to configure the rotating armature 14 with a small rotational balance with a small deviation of the center of gravity, thereby reducing the vibration of the motor 11 using the armature 14. Can contribute.

  (2) In the present embodiment, since the windings 17a and 17b are wound so as not to overlap in the axial direction, the winding protrusion amount (coil end height) from both axial end surfaces of the armature core 16 is determined. This can contribute to the reduction in the axis of the rotary armature 14 and the downsizing of the motor 11 in the axial direction. Further, since the windings 17a and 17b are wound so as not to overlap each other in the axial direction, the amount of use of the conductive wire 17x can be reduced, and the resistance value of the windings 17a and 17b can be reduced. The motor 11 can be provided.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the armature core 16 is formed in a shape as shown in FIG. 1, but the shape may be changed as appropriate. Further, although the armature core 16 is a laminated core, it may be a core made of magnetic powder.

In the above embodiment, the windings 17a and 17b are wound so as not to overlap in the axial direction. However, it is possible to adopt a mode in which a part of each winding 17a and 17b overlaps in the axial direction.
In the above embodiment, the predetermined segments 25 are short-circuited by using the short-circuit wire 26 by the conducting wire 17x. However, the winding mode of the windings 17a and 17b is slightly changed so that the predetermined segments 25 are not short-circuited. It is good.

  In the above embodiment, the motor 11 is configured by the four (four magnetic poles) magnets 13 and the ten (10 magnetic poles) windings 17. However, the number (number of magnetic poles) may be changed as appropriate. .

  DESCRIPTION OF SYMBOLS 14 ... Rotating armature, 16 ... Armature core, 17 ... Winding, 17a ... 1st winding (inner layer winding), 17b ... 2nd winding (outer layer winding), 21 ... Teeth, 21a ... Inner layer tooth part (1st teeth part), 21b, 21c ... Outer layer tooth part (2nd teeth part).

Claims (5)

A plurality of windings are wound around the teeth of the armature core, and the rotating armature is configured in a winding manner in which adjacent windings overlap in the circumferential direction,
The teeth of the armature core, one inner layer teeth part extending in a radial direction, with an outer layer tooth portions branching from the radially outer end of the inner teeth in the circumferential direction into two is formed,
Among the plurality of windings, every other winding in the circumferential direction that does not overlap in the same direction is wound around each inner layer tooth portion as a first winding, and every other winding that does not overlap in the circumferential direction. The winding is wound as a second winding over a pair of the outer layer teeth facing each other between adjacent teeth, and the first and second windings are in the most separated positions except the 180 ° facing position. A rotating armature characterized in that the rotating armature is configured by sequentially shifting to the tooth portion to be rotated. The rotary armature according to claim 1,
A rotating armature, wherein each of the windings is wound so as not to overlap in the axial direction.   A rotating electrical machine comprising the rotating armature according to claim 1. A plurality of windings are wound around the teeth of the armature core, and a manufacturing method of a rotating armature configured in a winding manner in which adjacent windings overlap in the circumferential direction,
The teeth of the armature core, one inner layer teeth part extending in a radial direction, with an outer layer tooth portions branching from the radially outer end of the inner teeth in the circumferential direction into two is formed,
Among the plurality of windings, every other winding in the circumferential direction that does not overlap in the same direction is wound around each inner layer tooth portion as a first winding, and every other winding that does not overlap in the circumferential direction. The winding is wound as a second winding over a pair of the outer layer teeth facing each other between adjacent teeth, and the first and second windings are in the most separated positions except the 180 ° facing position. A method for manufacturing a rotary armature, wherein the winding is successively shifted to the teeth portion to be wound. In the manufacturing method of the rotary armature according to claim 4,
A method of manufacturing a rotary armature, wherein the windings are wound so as not to overlap each other in the axial direction.

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