JP2010004637A - Insulator, armature, and electric motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To raise reliability in temperature detection of the armature winding in a rotating electric machine which adopts a concentrated winding system. <P>SOLUTION: A groove 26 opening to the reverse side of a tooth 12 is provided in the coil insulating portion 22 of an insulator 20, and a hole 28 communicating with the groove 26 is provided in the coil retaining portion 24a on the outside in the radial direction R. A temperature sensor is inserted from the hole 28 and placed in the groove 26, and then the armature winding is shaped by winding a wire thus fixing the temperature sensor by tension of the wire. Since the force is dispersed at the groove 26 even if an armature coil urges the temperature sensor to the groove 26, it is easy to avoid damage on the temperature sensor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an insulator and an armature and can be applied to a motor.

  For the purpose of protecting the temperature of an armature coil applied to a motor, techniques for mounting a temperature sensor in the vicinity of the armature coil are disclosed in Patent Documents 1 to 3 listed below.

  When the armature coil is wound by the distributed winding method, it is easy to attach a temperature sensor to the coil end portion. To give a specific example, in the final step of winding processing, a part of the coil end can be pushed open and deformed, and a temperature sensor can be inserted there. Alternatively, it is possible to perform winding processing in a state where the dummy of the temperature sensor is circumscribed to the stator core before shaping the coil end, and insert the temperature sensor instead of the dummy after the winding processing is completed.

  However, when the armature coil is wound by the concentrated winding method, since the coil end is in close contact with the stator core, the temperature sensor cannot be inserted by deforming the coil end as described above. In addition, it is inefficient to wind the dummy by the concentrated winding method with the dummy circumscribed to the stator core.

  Therefore, when the concentrated winding method is adopted, a temperature sensor is attached to the surface of the wire to be wound with an adhesive or the like, or a temperature sensor is attached around the winding to indirectly detect the winding temperature. It was.

JP 2007-082344 A JP 2008-029127 A Japanese Patent No. 3447702

  However, when the temperature sensor is attached to the surface of the electric wire with an adhesive, the reliability is uncertain depending on the bonding operation. In addition, when the winding temperature is indirectly detected from the temperature around the winding, it takes time to detect the temperature change when a sudden temperature change occurs, and the reliability is low.

  In view of the above problems, an object of the present invention is to provide a technique for increasing the reliability of armature winding temperature detection in a rotating electrical machine that employs a concentrated winding method.

  In order to solve the above-mentioned problem, the first invention includes a first part (22) mounted on a tooth (12) provided with an armature coil (16) around the first part (22), and substantially perpendicular to the first part. An insulator (20) having a second part (24; 24a, 24b) extending in one direction, wherein the second part exhibits a hole (28) penetrating in the thickness direction, and the first part Presents a groove (26) that opens on the one side and communicates with the hole.

  2nd invention is 1st invention, Comprising: The said groove | channel (26) is opened also on the opposite side to the said one direction.

  3rd invention is 2nd invention, Comprising: The said 2nd part (24; 24a, 24b) is provided with two or more mutually facing along the extension direction of the said groove | channel (26), The said plurality The holes (28) of each of the second parts communicate with each other through the groove.

  According to a fourth aspect of the present invention, there is provided a tooth (12), an armature coil (16) provided around the tooth, a first part (22) placed on the tooth, and substantially perpendicular to the first part. And an insulator (20) having a second part (24; 24a, 24b) extending in one direction, wherein the second part has a hole (through the thickness direction) ( 28), and the first part further includes a temperature sensor (52) that opens on the one side and has a groove (26) communicating with the hole, and is housed in the groove and the hole.

  5th invention is 4th invention, Comprising: The said groove | channel (26) exhibits the shape matched with the outer diameter of the said temperature sensor (52).

  6th invention is 4th or 5th invention, Comprising: The said groove | channel (26) is opened also on the opposite side to the said one direction.

  7th invention is 6th invention, Comprising: The said 2nd part (24; 24a, 24b) is provided with two or more mutually facing along the extension direction of the said groove | channel (26), The said plurality The holes (28) of each of the second parts communicate with each other through the groove.

  The eighth invention is a motor (100) comprising any one of the fourth to seventh inventions.

  According to the first invention, at the end portion of the tooth in the rotation axis direction of the motor formed by the armature having the teeth, the first portion is placed on the teeth while the second portion is disposed on the side opposite to the teeth. By providing the armature coil on the tooth through the first part, the armature coil and the tooth are effectively insulated at the end in the rotation axis direction of the tooth.

  For example, a temperature sensor can be provided in the groove before the armature coil is provided. Moreover, if the armature coil is wound around the teeth via the insulator by concentrated winding, the temperature sensor can be urged toward the groove by the coil tension and fixed. At this time, the force generated between the temperature sensor and the first part by being urged by the temperature sensor is dispersed in the groove, so that it is easy to avoid damage to the temperature sensor. In addition, since a part of the temperature sensor can be brought into contact with the coil, it contributes to an improvement in temperature detection capability.

  According to the second invention, for example, when a temperature sensor is disposed in the groove, it is possible to measure the temperature of the part of the coil or teeth that is at a higher temperature.

  According to the third invention, since the holes are provided at both ends of the groove, when the armature adopting the insulator is adopted for the radial gap type motor, one hole is opened to the rotor side. The temperature of the rotor, and thus the temperature of the magnet disposed on the rotor can be detected indirectly.

  According to the fourth invention, the temperature sensor can be disposed without being damaged, and the temperature sensor can be fixed by the tension of the coil. In addition, since a part of the temperature sensor can be brought into contact with the coil, it contributes to an improvement in temperature detection capability.

  According to the fifth aspect, it is possible to avoid or suppress the application of excessive mechanical stress to the temperature sensor.

  According to the sixth aspect of the invention, it is possible to measure the temperature of the part of the coil or teeth that is at a higher temperature.

  According to the seventh aspect, since the holes are provided at both ends of the groove, when the armature is employed in the radial gap type motor, since one hole is opened to the rotor side, the temperature of the rotor As a result, the temperature of the magnet disposed on the rotor can be indirectly detected.

  According to the eighth aspect, the same effect as described above can be obtained.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following drawings including FIG. 2, only elements related to the present invention are shown.

<First Embodiment>
FIG. 1 is a plan view of a rotating electrical machine 100 on which an insulator 20 according to a first embodiment of the present invention is mounted, and shows a view seen from the direction of the rotation axis Q. FIG. 2 is a perspective view showing a part of the teeth 12 and the insulator 20 included in the rotating electrical machine 100.

  As shown in FIG. 1, the rotating electrical machine 100 faces the rotor 30 via the rotor 30 that rotates about the rotational axis Q of the rotating electrical machine 100 and the radial direction R about the rotational axis Q via the air gap AG. Armature 10.

  The rotor 30 has a substantially cylindrical shape, in which a magnet 32 is embedded in an annular shape while alternating magnetic poles with the magnetic pole surfaces 32N and 32S facing in the radial direction R. Here, the centers of the magnetic pole surfaces 32N and 32S of the magnet 32 are orthogonal to the radial direction R.

  The armature 10 includes a plurality of teeth 12 projecting substantially parallel to the radial direction R from the inner wall of the yoke 18 concentric with the rotor 30 toward the rotor 30. In this embodiment, one yoke 18 and one tooth 12 are formed as a pair, and these are arranged in an annular shape to form the armature 10. Further, in the present embodiment, the yoke 18 and the teeth 12 are formed by punching a steel plate extending in a plane with the rotation axis Q direction as a normal line and laminating in the rotation axis Q direction. That is, it can be understood that the yoke 18 and the teeth 12 are integrally formed in a one-to-one manner.

  The armature 10 also includes an insulator 20 and an armature coil 16.

  As shown in FIG. 2, the insulator 20 is provided on the end surface in the direction of the rotation axis Q for each of the plurality of teeth 12. In FIG. 2, the teeth 12 and the yoke 18 are illustrated only from one end face of the height in the direction of the rotation axis Q, but the insulator 20 is also provided on the other end face.

  The insulator 20 includes a coil insulating part (first part of means for solving the problem) 22 placed on the teeth 12, and a coil pressing part 24 (problem) standing upright from a radial R end of the coil insulating part 22. 2nd part of the means for solving the problem. The coil pressing portion 24 includes a coil pressing portion 24 a that presses the armature coil 16 on the outer side in the radial direction R, and a coil pressing portion 24 b that presses the armature coil 16 on the inner side in the radial direction R.

  FIG. 3 is a partially enlarged view of the armature 10 and shows a view from the rotation axis Q in the radial direction R. In addition, the coil holding | maintenance part 24b inside radial direction R is shown with the imaginary line (two-dot chain line).

  As shown in FIG. 3, the coil insulating portion 22 has a substantially semi-elliptical shape in a cross-sectional view in the radial direction R, and the semi-elliptical string is preferably in contact with the end face of the tooth 12. Among the surfaces of the coil insulating portion 22, the surface that is not in contact with the teeth 12 is smoothly continuous, whereby the tension of the armature coil 16 is uniformly applied to the entire coil insulating portion 22.

  Further, it is desirable that the length of the string and the width of the end face of the tooth 12 (length in a direction orthogonal to both the rotation axis Q and the radial direction R) are substantially equal. When the length of the string is larger than the width of the end face of the tooth 12, it is difficult to efficiently insulate the tooth 12 and the armature coil 16 from each other. Moreover, when the length of the said string is smaller than the width | variety of the end surface of the teeth 12, the tension | tensile_strength applied to the armature coil 16 will become nonuniform, and it will cause a failure | damage.

  The coil insulating portion 22 presents a groove 26 that is recessed along the radial direction R from the elliptical arc toward the string. Further, the radially outer coil pressing portion 24a smoothly communicates with the groove 26 along the extending direction of the groove 26 and presents a hole 28 that opens radially outward.

  In other words, the coil pressing portion 24a on the radially outer side exhibits a hole 28 that penetrates in the radial direction R that is the thickness direction thereof, and the coil insulating portion 22 opens on the opposite side to the tooth 12 in the rotation axis Q direction, And the groove | channel 26 connected with the hole 28 is exhibited.

  The armature coil 16 is shaped around the teeth 12 and the insulator 20 by winding the conductive wire 14 in a concentrated winding manner with the radial direction R as a winding axis.

  At the end of the tooth 12 in the direction of the rotation axis Q, the coil pressing portion 24a is disposed on the opposite side of the tooth 12 while the coil insulating portion 22 is placed on the tooth 12. By providing the armature coil 16 in the tooth 12 via the coil insulating portion 22, the armature coil 16 and the tooth 12 are effectively insulated.

  For example, a temperature sensor 52 (see FIGS. 1 and 3) can be disposed in the groove 26 before the conductor 14 is wound and the armature coil 16 is provided. In addition, if the armature coil 16 is wound around the tooth 12 via the insulator 20 by concentrated winding, the temperature sensor 52 can be urged and fixed toward the groove 26 by the tension of the armature coil 16. Now, the surface of the coil insulating portion 22 that is not in contact with the tooth 12 is smoothly continuous (specifically, has a substantially semi-elliptical shape), and therefore the temperature sensor 52 disposed in the groove 26. Can be reliably biased toward the groove 26. Since the force generated between the temperature sensor 52 and the coil insulating portion 22 when the temperature sensor 52 is energized is dispersed in the groove 26, the temperature sensor 52 is easily damaged. Moreover, since a part of the temperature sensor 52 can be brought into contact with the armature coil 16, it contributes to an improvement in temperature detection capability. Therefore, it is desirable that the groove 26 has a shape that matches the outer shape of the temperature sensor 52.

  In FIG. 1, only one temperature sensor 52 is provided in one rotating electrical machine 100, but it may be provided in each tooth 12.

  For example, the following method is effective for disposing the temperature sensor 52. That is, the temperature sensor 52 is placed in the groove 26, and then the conductive wire 14 is wound around the teeth 12 and the insulator 20 to shape the armature coil 16. By adopting such a method, the temperature sensor 52 can be disposed without being damaged.

  Thus, when the temperature sensor 52 is provided in the groove 26, that is, when it is desired to detect the temperature of the armature 10, the following may be performed, for example.

Second Embodiment
FIG. 4 is a partially enlarged view of an armature on which an insulator 20A according to the second embodiment of the present invention is mounted, and shows a view seen in the radial direction R from the rotation axis Q. In addition, the coil holding | maintenance part 24b inside radial direction R is shown with the imaginary line (two-dot chain line). In addition, about the structure which has the function similar to the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The groove 26A is opened not only on the side opposite to the teeth 12 but also on the teeth 12 side. Since the groove 26A is also opened on the tooth 12 side, the temperature sensor 52 can be in contact with both the conductive wire 14 and the tooth 12 constituting the armature coil 16, and therefore the temperature of any one of the portions that are at a high temperature is measured. This contributes to temperature protection of the armature coil 16.

<Third Embodiment>
FIG. 5 is a perspective view showing an insulator 20B and a part of the teeth 12 according to the third embodiment of the present invention.

  The insulator 20B is formed with a groove 26B in which the groove 26 shown in the first embodiment extends over the entire radial direction R. The coil holding portion 24b on the inner side in the radial direction R communicates with the groove 26B and presents a hole 28B penetrating in the radial direction R.

  Thus, if the holes 28 and 28B are provided in both of the coil pressing portions 24a and 24b and the groove 26B extends between the holes 28 and 28B, the hole 28B opens to the rotor 30 side. Therefore, the temperature of the rotor 30 and thus the temperature of the magnet 32 embedded in the rotor 30 can be indirectly detected.

  As mentioned above, although the suitable aspect of this invention was demonstrated, this invention is not limited to this. For example, by combining the second embodiment and the third embodiment, the groove 26 is open in any direction of the rotation axis Q, and both the two coil pressing portions 24a and 24b communicate with the groove 26. And you may exhibit the hole which penetrates.

It is a top view of the rotary electric machine carrying the insulator which concerns on 1st Embodiment of this invention. It is a perspective view which shows a part of teeth and an insulator with which a rotary electric machine is provided. It is the elements on larger scale of an armature. It is the elements on larger scale of the armature which mounts the insulator which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the insulator which concerns on 3rd Embodiment of this invention, and a part of teeth.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Rotating electrical machine 10 Armature 12 Teeth 14 Conductor 16 Armature coil 18 Yoke 20, 20A, 20B Insulator 22, 22A, 22B Coil insulation part 24, 24a, 24b Coil pressing part 26, 26A, 26B Groove 28, 28B Hole 52 Temperature Sensor

Claims (8)

A first part (22) placed on a tooth (12) around which an armature coil (16) is provided;
An insulator (20) having a second part (24; 24a, 24b) extending substantially vertically and in one direction from the first part,
The second part presents a hole (28) penetrating in its thickness direction,
The said 1st part is an insulator which exhibits the groove | channel (26) opened to the said one side, and connected with the said hole. An insulator (20) according to claim 1, comprising:
The said groove | channel (26) is an insulator opened also on the opposite side to the said one direction. An insulator (20) according to claim 2, comprising:
A plurality of the second parts (24; 24a, 24b) are provided facing each other along the extending direction of the groove (26),
The said hole (28) which each of these said 2nd parts has is an insulator connected via the said groove | channel. Teeth (12),
An armature coil (16) provided around the teeth;
An electric machine comprising: a first part (22) placed on the teeth; and an insulator (20) having a second part (24; 24a, 24b) that is substantially perpendicular to the first part and extends in one direction. Child (10)
The second part presents a hole (28) penetrating in its thickness direction,
The first part has a groove (26) that opens to the one side and communicates with the hole;
The armature further comprising a temperature sensor (52) received in the groove and the hole. The armature (10) according to claim 4, wherein
The said groove | channel (26) is an armature which exhibits the shape matched with the outer diameter of the said temperature sensor (52). An armature (10) according to claim 4 or claim 5, wherein
The said groove | channel (26) is an armature opened also on the opposite side to the said one direction. An armature (10) according to claim 6,
A plurality of the second parts (24; 24a, 24b) are provided facing each other along the extending direction of the groove (26),
The hole (28) included in each of the plurality of second parts is an armature that communicates with the groove.   A motor (100) comprising the armature (10) according to any one of claims 4 to 7.

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