JP2006074995A - Rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a rotating electrical machine for improving winding workability and suppressing an insulation failure without intersecting leads of windings disposed at a mechanically balanced position. <P>SOLUTION: In a motor for an electric power steering device, n windings 4B (n is a common denominator between the number of magnetic poles 102 and the number of slots 101, in this regard, however not less than 2) are connected in parallel between yokes and segments 112, and the windings 4B are symmetrically disposed with respect to a mechanical angle of 360 degrees, and respective leads 5B of the other windings 4B of the windings 4B nearest in a circumferential direction seen from the segments 112 are led out in the same circumferential direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotating electrical machine including a commutator having a plurality of segments.

  FIG. 11 is a side sectional view of a motor 100 for electric power steering, which is a conventional rotating electric machine. The electric power steering motor 100 is provided with a cylindrical yoke 101, a magnetic pole 102 having four poles that is fixed in the yoke 101 and configured by a permanent magnet, and a bearing 103 that is rotatably provided in the yoke 102. A shaft 104, an armature fixed to the shaft 104, a commutator 106 fixed to the end of the shaft 104, and a brush holder that contacts the surface of the commutator 106 by the elastic force of a spring (not shown). And a brush 108 held by a roller 107.

The amateur 105 includes a core 109 having 22 slots 110 extending in the axial direction, and a winding 111 formed by winding a conductive wire around the slot 110 in a double winding manner.
The hollow cylindrical commutator 106 includes 22 copper segments 112 disposed at equal intervals, and a resin material that is disposed between the segments 112 and insulates and retains between the adjacent segments 112. ing.
In the electric power steering motor 100 of the 4-pole, heavy winding method, the armature 105 rotates together with the shaft 104 by an electromagnetic action by supplying current to the winding 111 from the outside via the brush 108 in contact with the segment 112. To do.

FIGS. 12 and 13 show the mounting positions of the winding 111, the magnetic pole 102, the commutator 106, and the brush 108, and the windings in which the respective members are arranged in a cylindrical shape in the rotational direction are developed in a planar shape. It is explanatory drawing.
The motor 100 for an electric power steering apparatus in FIG. 11 includes 22 teeth 113, 22 segments 112, and 4 magnetic poles 102, but each winding portion 114 that is a component of the winding 111, and each segment 112 In order to make it easy to understand the mutual connection relationship, it is shown longer over 360 ° or more (720 °).

  The part with the N and S marks shows the magnetic pole 102, and the part with the + and-marks at the bottom shows the brush 108, respectively. The teeth 113 are numbered 1 to 22 below the N and S marks, squares define the slots 110, and the squares numbered 1 to 22 just above the brush 108 are the segments 112.

As shown in FIG. 14, the winding 111 in this example is configured by a so-called double wrapping in which two winding portions 114 are connected in parallel between two adjacent segments 112. 12 is an explanatory diagram of windings of the armature 105 on the radially outer side (upper stage) of the core 109, and FIG. 13 is an explanatory diagram of windings of the armature 105 on the radially inner side (lower stage) of the core 109.
The double-winding winding 111 has an advantage of improving the winding workability because the conductive wire can be made thinner than the single-winding winding.
In FIG. 14, as shown in FIG. 15, the winding portion 114 indicated by the dotted line is in contact with the two segments 112 and has the same potential between the segments, as shown in FIG. It indicates that no current is flowing.
In this example, which has a total of 22 segments 112, 22 winding portions 114 are arranged on the upper and lower stages of the winding 111, respectively, but the upper and lower stages are wound on the same slot 110. Instead of accommodating the portion 114, it is disposed in another magnetically symmetric slot as shown in FIGS. 16 (a) to 16 (c).

Here, for example, the lead portions 115A and 115B are segment Nos. 12 and No. When attention is paid to the upper winding portion 114A and the lower winding portion 114B of the winding 111 connected between the upper winding portion 114A and the lower winding portion 114A, 10 and no. No. 11 of the slot 110 between the teeth 11 and the teeth 113. 15 and No. No. 16 of the segment 112 is formed by winding a conducting wire a plurality of times between the slot 110 and the slot 110. 12 and No. 13 is located almost directly above. On the other hand, the lower winding portion 114 </ b> B is the No. of the tooth 113. 21 and no. No. 22 of the slot 110 between the teeth 22 and the teeth 113. 4 and no. No. 5 of the segment 112 is formed by winding a conductive wire a plurality of times between the slot 110 and the slot 110. 1 and No. 2 is located almost directly above. That is, the same segment 112 No. No. 12 of the same segment 112 from the starting point. The upper winding portion 114A and the lower winding portion 114B, whose end point is 13, are at a position 180 degrees apart in mechanical angle.
By arranging in this way, the winding portion 114 rectified at the same timing is mechanically balanced even when a problem occurs in the brush 108 on one side, or even when a slight characteristic deviation occurs due to a difference in individual. It is arranged at a position, and vibration due to electromagnetic force can be suppressed.

  In the electric power steering apparatus motor 100 configured as described above, as can be seen from FIG. 13, the lead portions 115B of the lower winding portion 114 of the winding 111 connected to the segment 112 become longer and cross each other. As a result, the coil end portion of the armature 105 becomes large, and the winding workability of winding the conductive wire to manufacture the winding 111 becomes difficult, and the insulation failure of the winding 111 is likely to occur. .

  An object of the present invention is to solve the above-described problems, and the conductive wires are wound and wound without crossing the lead portions of the winding portions arranged at mechanically balanced positions. An object of the present invention is to obtain a rotating electrical machine that improves winding workability for manufacturing a wire and suppresses insulation failure.

  A rotating electrical machine according to the present invention includes a yoke, a magnetic pole fixed in the yoke, a shaft rotatably provided in the yoke, and an axially extending outer peripheral surface of a core fixed to the shaft. An armature having a winding composed of a plurality of winding portions formed by winding a conducting wire between a plurality of formed slots, and a winding portion fixed to the shaft and the winding portion; And a plurality of brushes in contact with the surface of the segment, and n (n is the above-mentioned) between the segments. A rotating electrical machine in which the winding parts of the number of poles of the magnetic pole and the common divisor of the number of slots (but 2 or more) are connected in parallel, and the winding parts are arranged symmetrically with respect to a mechanical angle of 360 degrees. And said segment Each lead part of the other winding part of the winding part that is closest in the circumferential direction as viewed from the outside is led out in the same circumferential direction, and the segments that should be at the same potential are connected by a pressure equalizing line, The conducting wire and the pressure equalizing wire are made of the same member, the winding and the pressure equalizing wire are continuously connected, and the conducting wire is an enamel-coated round wire.

  In the rotating electrical machine according to the present invention, a conductive wire is wound in multiple windings and wave windings between a shaft and a plurality of slots formed in the axial direction on the outer peripheral surface of a core fixed to the shaft. An armature having a winding composed of a plurality of heavy winding portions and wave winding portions formed, and fixed to the shaft, and the heavy winding portion and the wave winding The lead portion includes a commutator having a plurality of segments in which lead portions at both ends of the winding portions are electrically connected, and a plurality of brushes in contact with the surface of the segments, and one of the lead portions. Are connected to the same segment, the winding portion of the heavy winding and the winding portion of the wave winding are arranged symmetrically with respect to a mechanical angle of 360 degrees, and the winding portion of the wave winding is both lead portions Are derived in the same circumferential direction The segments to be at the same potential are connected by a pressure equalizing wire, the conducting wire and the pressure equalizing wire are composed of the same member, and the winding and the pressure equalizing wire are continuously connected, The conductor is an enameled round wire.

  According to the rotating electrical machine according to the present invention, the winding workability of winding the conductive wire to manufacture the winding is improved without the crossover of the lead portions of the winding portion arranged at the mechanically balanced position, and the insulation is insulated. There are effects such as suppressing defects.

Each embodiment of the present invention will be described below, but the same or corresponding parts as those of the conventional one will be described with the same reference numerals.
Embodiment 1 FIG.
1 is a cross-sectional view of a motor 1 for an electric power steering apparatus that is a rotating electric machine according to Embodiment 1 of the present invention, and FIGS. 2 and 3 are explanatory views of windings of the motor 1 for an electric power steering apparatus of FIG.
The motor 1 for an electric power steering apparatus includes a cylindrical yoke 101, a magnetic pole 102 fixed in the yoke 101 and formed of a permanent magnet, and a shaft 104 rotatably provided by a bearing 103 in the yoke 102. The armature 2 fixed to the shaft 104, the commutator 106 fixed to the end of the shaft 104, and the surface of the commutator 106 abuts by the elastic force of a spring (not shown) and is held by the brush holder 107. The brush 108 is provided.

The amateur 2 includes a core 109 having a plurality of slots 110 extending in the axial direction, and a winding 3 formed by winding a conductive wire around the slot 110 in a double winding manner.
The hollow columnar commutator 106 includes 22 copper segments 112 arranged at equal intervals, and a resin material that insulates the segments 112.
In the motor 1 for the electric power steering apparatus of the above-described four-pole, heavy winding method, the armature 2 is electromagnetically actuated together with the shaft 104 by supplying current to the winding 3 through the brush 108 that abuts the segment 112. Rotate.

FIGS. 2 and 3 are explanatory views of windings in which the windings 3, the magnetic poles 102, the commutators 106, and the brushes 108 are arranged in a cylindrical shape in the rotational direction in order to show the positional relationship of the windings. It is.
In the motor 1 for the electric power steering apparatus of FIG. 1, the 22 teeth 113, the 22 segments 112, and the 4 magnetic poles 102 are provided in order to make it easy to understand the connection relationship between the winding portions 4 and the segments 112. In FIG. 4, the length is longer than 360 ° (720 °).

  The part with the N and S marks shows the magnetic pole 102, and the part with the + and-marks at the bottom shows the brush 108, respectively. A square numbered 1 to 22 below the N and S marks indicates a tooth 113 that defines the slot 110, and a square numbered 1 to 22 immediately above the brush 108 indicates a segment 112. A group of wires starting from the segment 112, facing the magnetic pole 102 through the slot 110, and returning to another segment 112 is the winding portion 4 that is a component of the winding 3.

The winding 3 in this example is constituted by a so-called double double winding in which two winding portions 4 are connected between the segments 112. 2 is a winding diagram of the core 109 on the radially outer side (upper stage), and FIG. 3 is an explanatory diagram of the winding of the core 109 on the radially inner side (lower stage).
In the case of this example, the number of parallel circuit portions between the segments 112 is two and 22 winding portions 4 are arranged on the upper side and the lower side, respectively, but the same slot 110 is provided on the upper side and the lower side. The two winding portions 4 are not housed in the slots 110 but are arranged in slots 110 that are magnetically symmetrical to each other.

Here, for example, both ends of the segment 112 No. 8 and no. When attention is paid to the upper winding portion 4A and the lower winding portion 4B connected to each other, the upper winding portion 4A is connected to the No. 6 and no. No. 7 of the slot 110 between the teeth 7 and the teeth 113. 11 and no. No. 12 of the segment 112 is formed by winding a conducting wire a plurality of times between the slot 110 and the slot 110. 8 and no. 9 is located almost directly above. On the other hand, the lower winding portion 4 </ b> B has a No. of teeth 113. 17 and No. No. 18 of the slot 110 between the teeth 18 and the teeth 113. 22 and no. No. 1 of the segment 112 is formed by winding a conducting wire a plurality of times between the slot 110 and the slot 110. 19 and No. 20 is located almost directly above. That is, the same segment 112 No. No. 8 of the same segment 112 from the starting point. The upper winding portion 4A and the lower winding portion 4B, which end at 9, are at a position 180 degrees apart in mechanical angle.
By arranging in this way, the winding portion 4 always rectified at the same timing is mechanically balanced even when a problem occurs in the brush 108 on one side or when a slight characteristic deviation occurs due to a difference in individual. It is arranged at a position, and vibration due to electromagnetic force can be suppressed.

  In the conventional example, the lead portions 115B at both ends of the winding portion 114 intersect each other on the lower stage side of the armature 105, whereas in the first embodiment, the lead portions 115B at both ends of the lower winding portion 4 are crossed with each other. The lead portions 5B are led out in the same direction, and the lead portions 5B do not overlap each other. For this reason, the winding work which winds a conducting wire and manufactures the coil | winding 3 becomes easy, and insulation failure can also be suppressed.

  As shown in FIG. 4, the winding portion 4 may be composed of a plurality of small winding portions 40 connected in parallel to each other. In this case, since the conducting wire of the small winding part 40 can be made thin, there is an advantage that the winding workability of the conducting wire is improved.

  Further, in this embodiment, the number of slots is 22, the number of poles is 4, and the number of parallel circuit portions between the segments 112 is 2, that is, the amateur 2 in which the two winding portions 4 are connected in parallel. Not. For example, as shown in FIG. 5, in the case of 6 poles and 24 slots, the number of parallel circuits may be 3, and the three windings may be arranged at 120 ° mechanical angles. In this case as well, one winding portion may be arranged in the immediate vicinity of the segment connected via the lead portion, and the remaining two winding portions may be led out in the same direction so that the lead portions do not overlap.

  Note that the number n of the winding portions 4 between the segments 112 needs to be a common divisor of the number of the magnetic poles 102 and the number of the slots 110 from the viewpoint of equalizing the electromagnetic force. For example, in the case of 6 poles and 24 slots, the common divisor of 6, 24 is 1, 2, 3, 6 and the number of windings can be 1, 2, 3, 6. When the number 1 of the winding portions is selected, a parallel circuit cannot be formed between the segments 112, and the case where n is 1 is excluded.

Embodiment 2. FIG.
FIG. 6 is an explanatory diagram of windings on the lower side of winding 3 of the motor for an electric power steering apparatus according to Embodiment 2 of the present invention. Note that the winding explanatory diagram on the upper stage side of the winding 3 is the same as FIG.
The second embodiment is different from the first embodiment in that the segments 112 having the same potential are connected by the pressure equalizing line 11.
In the motor for an electric power steering apparatus according to the second embodiment, the segments 112 that should be at the same potential are electrically connected using the pressure equalizing wire 11, and the circuit portions between the brushes 108 of the winding 3 are connected. In addition to preventing the circulating current flowing through the circuit portion through the circuit portion due to the difference in the induced voltage, the magnetic attraction force imbalance caused by the difference in the number of winding portions 4 between the circuit portions can be suppressed.

  The contents will be described below. FIG. 7 is an electric circuit diagram in which each winding portion 4 of the amateur 10 is connected to each segment 112. In the following description, alphabetical characters are added to the numbers of the members of the brush, segment, and winding portion. I will explain.

  For example, originally, the three segments 112 should abut on the first brush 108A and the third brush 108C, and the two segments 112 should abut on the second brush 108B and the fourth brush 108D. Sometimes, for a moment, only the first and second segments 112a and 112x come into contact with the first brush 108A. As a result, in the first to fourth electric circuit portions 119a to 119d between the first to fourth brushes 108A to 108D, the number of the winding portions 4 should be equal to four at this point. Different things happen. That is, in the first circuit unit 119a, the first winding unit 4a to the fifth winding unit 4e are interposed, and five winding units 4 are interposed. Therefore, the current A flowing through the first electric circuit portion 119a and the current B flowing through the third electric circuit portion 119c should originally be the same value, but become different values. As a result, the magnetic attractive force acting on the amateur 10 is not balanced, and an exciting force is generated in the amateur 10 to generate an operating sound. However, for example, since the segments 112e and 112p are electrically connected by the pressure equalizing wire 11, the segment 112e of the first electric circuit portion 119a and the segment 112p of the third electric circuit portion 119c have the same voltage, The excitation force is reduced because the magnetic attractive force is balanced. In FIG. 7, only two equalizing lines 11 are shown, and the other ten equalizing lines are omitted.

Next, the procedure for connecting each winding portion 4 of the armature 10 to each segment 112 and connecting the segments 112 to each other with a pressure equalizing wire 11 will be described. A covered round wire is used, and the winding 3 and the equalizing wire 11 are continuously connected.
For example, in FIG. 6 showing the lower stage side (radially inner side) of the winding 3, the segment 112 No. No. 8 of the teeth 113 is connected to the winding portion 4B of the heavy winding connected to the lead portion 8B. 17 and No. No. 18 of the slot 110 between the teeth 18 and the teeth 113. 22 and no. No. 1 of the segment 112 in the lead portion 5B. 9 is connected. Thereafter, the segment 112 No. The pressure equalization line 11 derived from No. 9 is the No. of segment 112. 20. Subsequently, the segment 112 No. The winding portion 4B connected to the lead 20 by the lead portion 5B is the No. of the teeth 113. 7 and no. No. 8 of the slot 110 between the teeth 8 and the teeth 113. 12 and No. No. 13 of the segment 112 in the lead portion 5B. 21. After this, the segment 112 No. The pressure equalization line 11 derived from the line No. 10 is connected. Subsequently, the segment 112 no. No. 10 of the teeth 113 is connected to the winding part 4B connected to the lead part 5B. 19 and No. No. 20 of the slot 110 between the teeth 20 and the teeth 113. 2 and No. No. 3 of the segment 112 via the lead portion 5B. 11 is connected. Thus, each winding portion 4B is formed while changing the position of the slot 110, and the lower stage side of the winding 3 is manufactured.

  Thereafter, the upper stage side (radially outer side) of the winding 3 is manufactured. On the upper side, in FIG. The winding portion 4A of the heavy winding connected to the lead portion 8A is connected to the No. 8 of the teeth 113. 6 and no. No. 7 of the slot 110 between the teeth 7 and the teeth 113. 11 and no. No. 12 of the segment 112 is formed in the lead portion 5A. 9 is connected. Subsequently, the segment 112 no. The winding portion 4A connected to the lead 9 by the lead portion 5A 7 and no. No. 8 of the slot 110 between the teeth 8 and the teeth 113. 12 and no. No. 13 of the segment 112 in the lead portion 5A. 10 is connected. In this way, each winding part 4A is formed by changing the position of the segment 112 to be connected and the slot 110 to be attached to the adjacent segment 112 and slot 110, and the upper side of the winding 3 is manufactured.

Embodiment 3 FIG.
FIG. 8 is a winding diagram of the lower side of the winding 21 of the motor for the electric power steering apparatus according to the third embodiment of the present invention, and FIG. 9 is an electric circuit diagram of the winding 21. Note that the winding diagram on the upper side of the winding is the same as FIG.
In the third embodiment, the upper winding portion 4A, which is the outer diameter side of the winding 21 of the armature 20, is the same as in the first and second embodiments, and each winding portion 4A is connected. The segment 112 and the slot 110 to be mounted are formed one by one while changing the position to the adjacent segment 112 and slot 110, and the upper stage side of the winding 21 is manufactured.

On the other hand, as shown in FIG. 8, the lower winding portion 22B, which is the inner diameter side of the winding 21 of the armature 20, is a so-called wave winding, and each winding portion 22B is mechanically just opposite the position (about (Position 180 ° apart).
For example, the segment 112 No. No. 9 of the tooth 113 is connected to the winding portion 22B of the wave winding connected to the lead portion 23B. 18 and No. No. 19 of the slot 110 between the teeth 19 and the teeth 113. 1 and No. No. 2 of the segment 112 is formed in the lead portion 23B. 21 is connected. The segment 112 No. The winding portion 22B of the wave winding connected to the lead 21 by the lead portion 23B is the No. of the tooth 113. 8 and no. No. 9 of the slot 110 between the teeth 9 and the teeth 113. 13 and no. 14 is formed by winding a lead wire a plurality of times between the slot 110 and the slot 110, and the segment 112 No. 11 is connected.

In the third embodiment, the segment 112 No. The winding portion 22B starting from 9 does not end at the segment 112 but is connected to the segment 112 that is 180 ° away from the segment 112. In the case of such a connection, it is possible to balance the electromagnetic force in a certain rotation direction as in the first embodiment. Since the reverse direction cannot be balanced, there is a possibility that an electromagnetic excitation force may be generated if the brush characteristics vary. That is, the third embodiment can balance the electromagnetic force while shortening the lead portion 23B as much as possible for an application in which the rotation direction is fixed in one direction.
In addition, you may comprise by the some small winding part mutually connected in parallel about the winding part of a wave winding. Further, the heavy winding portion may also be composed of a plurality of small winding portions connected in parallel to each other. By configuring the winding with a small winding portion, there is an advantage that the conducting wire becomes thinner and the winding workability of the conducting wire is improved.

Embodiment 4 FIG.
FIG. 10 is a winding diagram of the lower stage of the winding 31 of the armature 30 of the motor for an electric power steering apparatus according to the fourth embodiment of the present invention. The upper stage side of the winding 31 is the same as FIG.
The fourth embodiment is different from the third embodiment in that the segments 112 having the same potential are connected by the pressure equalizing line 11.
In the motor for an electric power steering apparatus according to the fourth embodiment, the segments 112 that should be at the same potential are electrically connected using the pressure equalizing wire 11, and between each circuit portion between the brushes 108 of the winding 31. In addition to preventing the circulating current flowing to the brush 108 through the electric circuit portion due to the difference in the induced voltage, the magnetic attraction force imbalance caused by the difference in the number of winding portions 32 between the electric circuit portions can be suppressed. .

  In the fourth embodiment, similarly to the second embodiment, the enamel-covered round wire of the same member is used for the conducting wire and the pressure equalizing wire 11, and the winding 31 and the pressure equalizing wire 11 are continuously connected. You may do it. Moreover, when manufacturing a coil | winding, a coil | winding may be manufactured with one nozzle of a winding machine, and a conducting wire may be simultaneously wound using a some nozzle, and a coil | winding may be manufactured. Further, the pressure equalizing line 11 may be appropriately reduced as necessary. In the first to fourth embodiments, the arrangement of the upper winding portion and the lower winding portion of the winding may be reversed. Of course, the present invention can also be applied to rotating electrical machines other than motors for electrical power steering devices.

As described above, according to the rotating electrical machine of the present invention, the yoke, the magnetic pole fixed in the yoke, the shaft rotatably provided in the yoke, and the core fixed to the shaft are provided. An armature having a winding composed of a plurality of winding portions formed by winding a conducting wire with multiple windings between a plurality of slots formed extending in the axial direction on the outer peripheral surface, and fixed to the shaft And a commutator having a plurality of segments electrically connected to lead portions at both ends of the winding portion, and a plurality of brushes in contact with the surface of the segments, Are connected in parallel with n (n is a common divisor of the number of poles of the magnetic pole and the number of slots, but 2 or more), and the windings are mutually connected with respect to a mechanical angle of 360 degrees. Rotating electricity arranged symmetrically Since each lead part of the other winding part of the winding part that is closest in the circumferential direction as viewed from the segment is led out in the same circumferential direction, it is arranged at a mechanically balanced position. The winding workability is improved and insulation defects are suppressed without crossing the lead portions of the winding portions.
In addition, since the segments that should be at the same potential are connected by a pressure equalizing line, the circulating current flowing to the brush through the electric circuit portion can be prevented by the difference in the induced voltage generated between the electric circuit portions between the brushes of the winding. In addition, it is possible to suppress the unbalance of the magnetic attractive force caused by the difference in the number of winding portions between the electric circuit portions, and to realize noise reduction. In particular, even if the load current fluctuates, the change in the rotating electric machine sound is small, and this is effective for a load state that frequently changes, such as an electric power steering motor.
Moreover, since the conducting wire and the pressure equalizing wire are made of the same member and the winding and the pressure equalizing wire are connected continuously, the manufacturing efficiency of the rotating electrical machine is greatly improved.
In addition, since the conducting wire is an enamel-coated round wire, it is easy to mechanize the process of winding the conducting wire around the core and manufacture the winding, enabling mass production of amateurs and reducing the manufacturing cost of rotating electrical machines. Is done.

Further, according to the rotating electrical machine of the present invention, the conductive wire is wound in multiple windings and wave windings between the shaft and a plurality of slots formed in the axial direction on the outer peripheral surface of the core fixed to the shaft. An armature having a winding composed of a plurality of heavy winding portions and wave winding portions, and fixed to the shaft, and the heavy winding portion and the wave. A commutator having a plurality of segments electrically connected to lead portions at both ends of each winding portion of the winding, and a plurality of brushes in contact with the surface of the segments; The heavy winding portion and the wave winding portion connected to the same segment of the lead portion are arranged symmetrically with respect to a mechanical angle of 360 degrees, and the wave winding portions are both Lead leads out in the same circumferential direction Because they are, without lead of the winding portion of the wave winding disposed in mechanically balanced position intersect, it improved winding workability and insulation failure can be suppressed.
In addition, since the segments that should be at the same potential are connected by a pressure equalizing line, the circulating current flowing to the brush through the electric circuit portion can be prevented by the difference in the induced voltage generated between the electric circuit portions between the brushes of the winding. In addition, it is possible to suppress the unbalance of the magnetic attractive force caused by the difference in the number of winding portions between the electric circuit portions, and to realize noise reduction. In particular, even if the load current fluctuates, the change in the rotating electric machine sound is small, and this is effective for a load state that frequently changes, such as an electric power steering motor.
Moreover, since the conducting wire and the pressure equalizing wire are made of the same member and the winding and the pressure equalizing wire are connected continuously, the manufacturing efficiency of the rotating electrical machine is greatly improved.
In addition, since the conducting wire is an enamel-coated round wire, it is easy to mechanize the process of winding the conducting wire around the core and manufacture the winding, enabling mass production of amateurs and reducing the manufacturing cost of rotating electrical machines. Is done.

  Further, according to the rotating electrical machine according to the present invention, when the winding portion is composed of a plurality of small winding portions connected in parallel to each other, the conductor of the small winding portion wound around the core is As a result, the winding workability is improved and the rotating electrical machine can be downsized.

  Further, according to the rotating electrical machine of the present invention, when the number of slots and segments is 22, the number of poles is 4, and two winding portions are connected in parallel between the segments, These two winding portions can be arranged at opposing positions.

  Further, according to the rotating electrical machine of the present invention, when the rotating electrical machine is an electric power steering motor, an electric power steering motor with low noise, low cost, and high reliability can be obtained.

1 is a cross-sectional view of a motor for an electric power steering apparatus according to Embodiment 1 of the present invention. It is winding explanatory drawing of the upper stage side of the coil | winding of the motor for electric power steering apparatuses of FIG. It is winding explanatory drawing of the lower stage side of the coil | winding of the motor for electric power steering apparatuses of FIG. It is a modification of the coil | winding part connected in parallel. It is the further modification of the coil | winding part connected in parallel. It is winding explanatory drawing of the lower stage side of the coil | winding of the motor for electric power steering apparatuses of Embodiment 2 of this invention. FIG. 7 is an electric circuit diagram of the electric power steering apparatus motor of FIG. 6. It is winding explanatory drawing of the lower stage side of the coil | winding of the motor for electric power steering apparatuses of Embodiment 3 of this invention. FIG. 9 is an electric circuit diagram of the electric power steering apparatus motor of FIG. 8. It is winding explanatory drawing of the lower stage side of the coil | winding of the motor for electric power steering apparatuses of Embodiment 4 of this invention. It is sectional drawing of the motor for the conventional electric power steering apparatus. FIG. 12 is an explanatory diagram of windings on the upper stage side of the motor for the electric power steering apparatus motor of FIG. 11. FIG. 12 is an explanatory diagram of a winding on the lower side of the winding of the motor for the electric power steering apparatus of FIG. 11. FIG. 12 is an electric circuit diagram of the electric power steering apparatus motor of FIG. 11. It is a figure which shows the relationship between the brush of FIG. 11, and a segment. It is explanatory drawing which shows the positional relationship of the coil | winding part of FIG.

Explanation of symbols

  1 Motor for electric power steering device, 2, 10, 20, 30 amateur, 3, 21, 31 winding, 4, 4A, 4B, 22B winding part, 5, 5A, 5B, 23B lead part, 11 equalizing line , 40 Small winding section, 101 yoke, 102 magnetic pole, 104 shaft, 106 commutator, 108 brush, 109 core, 110 slot, 112 segment.

Claims (5)

York,
A magnetic pole fixed in the yoke;
A shaft rotatably provided in the yoke;
A winding composed of a plurality of winding portions formed by winding a conductive wire with a plurality of slots between a plurality of slots formed extending in the axial direction on the outer peripheral surface of the core fixed to the shaft. Having an amateur,
A commutator having a plurality of segments fixed to the shaft and electrically connected to lead portions at both ends of the winding portion;
A plurality of brushes in contact with the surface of the segment;
Between the segments, n windings (n is a common divisor of the number of poles of the magnetic pole and the number of slots, but 2 or more) are connected in parallel, and the windings have a mechanical angle of 360 degrees. Rotary electric machines arranged symmetrically with respect to each other,
Each lead part of the other winding part of the winding part that is closest in the circumferential direction as viewed from the segment is led out in the same circumferential direction,
The segments that should be at the same potential are connected by a pressure equalization line,
The conducting wire and the pressure equalizing wire are composed of the same member, and the winding and the pressure equalizing wire are continuously connected,
The lead wire is a rotating electric machine that is a round wire with an enamel coating. A shaft,
A plurality of multiple winding portions formed by winding a plurality of slots in a plurality of slots formed extending in the axial direction on the outer peripheral surface of the core fixed to the shaft, An amateur having a winding composed of a winding portion of a wave winding;
A commutator having a plurality of segments fixed to the shaft and electrically connected to the lead portions at both ends of the heavy winding portion and the wave winding portion,
A plurality of brushes in contact with the surface of the segment;
The heavy winding portion and the wave winding portion in which one of the lead portions is connected to the same segment are arranged symmetrically with respect to a mechanical angle of 360 degrees,
And the winding part of the wave winding has both lead parts led out in the same circumferential direction,
The segments that should be at the same potential are connected by a pressure equalization line,
The conducting wire and the pressure equalizing wire are composed of the same member, and the winding and the pressure equalizing wire are continuously connected,
The lead wire is a rotating electric machine that is a round wire with an enamel coating.   The rotating electrical machine according to claim 1 or 2, wherein the winding portion is composed of a plurality of small winding portions connected in parallel to each other.   The rotating electrical machine according to claim 1, wherein the number of slots and segments is 22, the number of poles is 4, and two winding portions are connected in parallel between the segments.   The rotating electrical machine according to any one of claims 1 to 4, wherein the rotating electrical machine is an electric power steering motor.

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