JP2007267521A - Temperature detection element attachment member, temperature detection member, and rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature detection element attachment member that can precisely position the attachment position of a temperature detection element, and can stably and surely measure a temperature of a coil of a stator, and to provide a temperature detection member and a rotating electric machine. <P>SOLUTION: This temperature detection member 20 detects a temperature by being attached to the stator 10, and comprises: lower-side parts that are inserted into clearances between the end face of a core 11 and the coil 12 from the external peripheral side of the core 11; side parts of the lower-side parts that are formed in regions that remain outside the coil 12 at the insertion at sides opposite to end faces of the core 11, and positioned at the external peripheral side of the coil 12; upper-side parts that are positioned at a side opposite to the coil 12 in a view from the core 11; and the temperature detection element that is attached to the face of the coil side of the upper-side parts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a temperature detection element attachment member for attaching a temperature detection element for detecting the temperature of a stator coil, a temperature detection member, and a rotating electrical machine to which the temperature detection member is attached. More specifically, the present invention relates to a temperature detection element mounting member, a temperature detection member, and a rotating electrical machine for mounting the temperature detection element in contact with a coil.

  Generally, a rotating electrical machine such as an electric motor generates heat during operation. In particular, when the load on the motor becomes excessive, there is a risk of large and rapid heat generation. In order to detect this heat generation and prevent damage to the coil or the like, conventionally, a temperature detecting element is attached to the coil portion to detect the temperature of the coil. For example, Patent Document 1 discloses an electric motor in which a temperature detection element fixed by a guide is inserted and fixed in a tunnel-like gap in a coil end portion of the electric motor. According to the technique described in this document, the temperature detection element is surely in contact with the coil surface, and the temperature detection element mounting structure is easy to maintain.

Also, depending on the type of motor, its arrangement, etc., even the stator with the same specifications, the part where the temperature becomes the fastest is slightly different. For this reason, it is desirable to arrange the temperature detecting element at a site where the temperature is expected to be the fastest depending on the type of electric motor, the type of onboard machine, and the like. Since this part can be judged to some extent by experiment, the mounting position of the temperature detection element has been set according to the result. Conventionally, the attachment position is often set above or to the side of the coil, and the temperature detection element is manually attached to the position by marking the position.
JP 2003-92858 A

  However, the conventional techniques described above have the following problems. In the technique described in Patent Document 1, since the guide for holding the temperature detection element is attached to the tunnel-shaped gap of the coil end portion, the temperature can be measured only at the portion between the coil end and the core. As a result, the temperature of the coil could not be measured properly under the influence of heat dissipation by the core. In general, this position was often different from the most desired position.

  Alternatively, in the method of attaching the temperature detection element manually by an operator, there is a tendency for variation in arrangement. If there are variations in the arrangement, the detection results also vary, so safety standards had to be set more strictly. In addition, it is necessary to devise such as marking the pallet that conveys the stator so that even an unskilled worker does not cause an arrangement error. However, there has been a problem that the number of types of pallets increases in this way.

  The present invention has been made to solve the above-described problems of the prior art. That is, the object is to provide a temperature detection element mounting member, a temperature detection member, and a rotating electrical machine that can accurately position the mounting position of the temperature detection element and that can stably and reliably measure the temperature of the stator coil. There is.

  The temperature detection element mounting member of the present invention, which has been made for the purpose of solving this problem, is a temperature detection element mounting member for mounting a temperature detection element on a coiled core, and the core is placed in the gap between the end surface of the core and the coil. A range from the lower side to the outer side having a lower side inserted from the outer peripheral side and an outer side provided on the opposite side of the end face of the core at the portion of the lower side remaining outside the coil when inserted The element attachment shape which attaches a temperature detection element is formed in the surface at the side of a coil inside.

  According to the temperature detecting element mounting member of the present invention, the lower side portion is inserted from the outer peripheral side of the core into the gap between the end surface of the core and the coil, and the outer side portion is provided on the side opposite to the end surface of the core. Therefore, it can be positioned accurately with respect to the core and coil. If the element mounting shape is formed at a desired position on the coil side surface within the range from the lower side portion to the outer side portion, the temperature of the part to be measured of the coil can be stably and reliably measured.

  Further, in the present invention, the outer side is provided on the outer side of the coil with an angle with respect to the side, and the upper side located on the opposite side of the coil as viewed from the core. It is desirable to have In such a case, the side portion is located on the outer peripheral side of the coil, the lower side portion is located on the core side of the coil, and the upper side portion is located on the opposite side of the coil as viewed from the core. Therefore, the element attachment shape for attaching the temperature detection element can be formed at an appropriate location such as the upper surface side or the outer periphery side of the coil.

  Furthermore, in the present invention, it is desirable that a wiring through shape that allows the wiring of the temperature detection element attached to the element attachment shape to pass outside the outer side portion is formed. If it is such, even if an element attachment shape exists inside the outer edge part of a temperature detection element attachment member, wiring can be passed outside.

  The present invention is also a temperature detection member for detecting temperature by being attached to a core with a coil, and a lower side portion inserted from the outer peripheral side of the core into a gap between the end surface of the core and the coil, and an insertion of the lower side portion Temperature detection having an outer side part provided on the opposite side of the end face of the core at a part that sometimes remains outside the coil, and a temperature detection element attached to the coil side surface within the range from the lower side part to the outer side part It extends to members.

  The present invention is also a rotating electrical machine having a coiled core and a temperature detection member, wherein the temperature detection member is inserted into the gap between the core end surface and the coil from the outer peripheral side of the core. The temperature attached to the coil side surface within the range from the lower side part to the outer side part on the opposite side to the end face of the core in the part of the lower side part remaining outside the coil when inserted It extends to a rotating electrical machine having a detection element.

  Furthermore, in the rotating electrical machine of the present invention, it is desirable to house a coiled core and to have a case for regulating outward movement of the temperature detection member. If it is such, when the core with a coil is accommodated in a case, the outward movement of the temperature detection member attached to it will be controlled. Therefore, in this state, there is no possibility that the temperature detection member falls out outward.

  According to the temperature detection element mounting member, the temperature detection member, and the rotating electrical machine of the present invention, the mounting position of the temperature detection element can be accurately positioned, and the temperature of the stator coil can be measured stably and reliably.

"First form"
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the present invention is applied to a stator in which a coil is wound around a stator core. In this embodiment, the temperature is detected above the coil of the stator (end of the stator in the rotation axis direction).

  As shown in FIGS. 1 and 2, the stator 10 according to the present embodiment has a coil 12 wound around a substantially annular core 11. Here, a so-called distributed winding stator 10 is provided in which a large number of slots 13 are provided on the inner peripheral surface of the core 11 and one coil 12 is wound around the plurality of slots 13. A slot paper 14 is also inserted in the slot 13 to ensure insulation between the core 11 and the coil 12. Here, a laminated core 11 is formed by laminating a plurality of electromagnetic steel plates having the same shape. Furthermore, a temperature detection member 20 is attached to the stator 10.

  As shown in FIGS. 2 and 3, the temperature detection member 20 has a shape of approximately three sides when viewed from the side. That is, it has an upper side 21, a lower side 22, and a side 23. As shown in FIG. 3, a groove 21a is formed on the lower surface of the upper side portion 21 in the figure, and a temperature detecting element 24 is bonded therein. Thus, when the temperature detection member 20 is arranged as shown in FIG. 2, the temperature detection element 24 contacts the upper part of the coil 12 in the drawing (see FIG. 5). Further, as shown in FIGS. 2 and 3, a through hole 21b is formed in contact with the groove 21a, and the lead wire 24a of the temperature detecting element 24 is exposed to the outside through the through hole 21b.

  Here, portions of the temperature detection member 20 other than the temperature detection element 24, that is, the entire upper side portion 21, lower side portion 22, and side side portion 23 correspond to the temperature detection element mounting member. In the present embodiment, the upper side portion 21 and the side side portion 23 correspond to the outer side portion. The groove 21a corresponds to the element mounting shape, and the through hole 21b corresponds to the wiring through shape. The temperature detecting element 24 may be anything such as a thermocouple contact or a thermistor.

  Further, as shown in FIGS. 2 and 4, the lower side portion 22 of the temperature detection member 20 is formed so thin that the tip end portion 22 a enters the gap between the adjacent slots 13. The base 22 b is formed in accordance with the shape of the core 11 on the outer peripheral side from the slot 13. The width of the base portion 22b is larger than the width of the tip portion 22a. Further, the base end surface (right end surface in FIG. 4) of the base end portion 22 b has a curved surface having the same curvature as the outer peripheral surface of the core 11.

  Further, as shown in FIGS. 2 and 5, the side portion 23 of the temperature detection member 20 is formed at a height at which the coil 12 can be sandwiched just inside. In FIG. 5, the coils 12 are shown together. As shown in FIG. 5, there is a slight gap between the slots 11 between the core 11 and the coil 12, and the lower side portion 22 can be inserted into this portion. When inserted in this way, the lower surface of the upper side 21 of the temperature detection member 20 is in contact with the upper surface of the coil 12 in the drawing. That is, as shown in FIG. 5, the temperature detecting element 24 is disposed so as to contact the upper surface of the coil 12 in the drawing.

  Further, in the insertion direction of the lower side portion 22, the temperature detection member 20 can be inserted to a predetermined position by contact between the base portion 22b and the slot paper 14 or contact between the side portion 23 and the coil 12. No more can be plugged in. And when arrange | positioned in this way, as shown in FIG. 4, the base end surface (right end surface in FIG. 4) of the base 22b makes the surface which followed the outer peripheral surface of the stator 10. As shown in FIG.

  When used as a component such as a motor, the stator 10 is generally housed in a case together with a rotor. For example, it is used by being inserted into the case 30 as shown in FIG. The case 30 also has a role of fixing the stator 10, and a fixing portion into which the outer peripheral surface of the core 11 is inserted is formed. In the stator 10 of the present embodiment, the base end surface (right end surface in FIG. 4) of the base portion 22b of the temperature detection member 20 is a surface continuous with the outer peripheral surface of the stator 10, and therefore the base portion 22b of the temperature detection member 20 is also the case 30. Therefore, the outward movement in the radial direction is restricted. In the example of FIG. 6, the case 30 is formed slightly larger in the radial direction in the upper half of the core 11. When such a case 30 is used, the base portion 22b of the temperature detection member 20 may be formed slightly larger according to the inner diameter of the case 30.

  As described above in detail, according to the temperature detection method of this embodiment, the temperature detection member 20 is attached with the coil 12 sandwiched between the upper side portion 21 and the lower side portion 22 thereof. At this time, since the temperature detection element 24 is attached to the lower surface of the upper side portion 21, the temperature detection element 24 is disposed in contact with the upper part of the coil. Further, since the base portion 22b of the lower side portion 22 is positioned by the case 30, the temperature detection element 24 is positioned with high accuracy. Further, since the axial displacement of the stator 10 is prevented by the coil 12, and the radial displacement of the stator 10 is prevented by the coil 12 and the case 30, the vibration due to the drive after assembly is received. Has a stable mounting. Therefore, the temperature detection element 24 can be positioned with high accuracy, and the temperature detection element can be stably and reliably measured for the temperature of the coil 12 of the stator 10. Also, when used as part of a motor development stage test, it can be easily pulled out and reused easily.

"Second form"
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the temperature is measured on the side of the stator coil. The stator according to this embodiment is basically the same as that of the first embodiment, and only the temperature detection member is different from that of the first embodiment. Here, only different parts will be described, and the same parts as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted.

  The stator 40 of this embodiment has a temperature detection member 41 as shown in FIG. As shown in FIG. 8, the temperature detection member 41 has a lower side portion 42 and a side portion 43. There is no portion corresponding to the upper side portion 21 of the temperature detection member 20 of the first embodiment. The lower side portion 42 is formed in the same shape as the lower side portion 22 of the temperature detection member 20. Further, a vertical groove 43a is formed in the side portion 43 on the inner peripheral side (left side surface in FIG. 8), and the temperature detecting element 44 is bonded to the inside of the vertical groove 43a. The lead wire 44a of the temperature detecting element 44 is extended upward along the vertical groove 43a.

  In this embodiment, a portion other than the temperature detection element 44 in the temperature detection member 41 corresponds to a temperature detection element mounting member. Further, the side part 43 corresponds to the outer side part. Further, the vertical groove 43a corresponds to the element mounting shape and the wiring through shape.

  Also in the temperature detection member 41 of this embodiment, the lower side portion 42 is accurately positioned by the coil 12 and the case. Therefore, the arrangement of the temperature detection element 44 fixed to the side portion 43 is also positioned with high accuracy.

  As described in detail above, the temperature detection method of the present embodiment can also accurately position the mounting position of the temperature detection element 44 and can stably and reliably maintain the temperature of the coil 12 of the stator 40 as in the first embodiment. It has a temperature detection element mounting structure that can be measured easily.

  In addition, this form is only a mere illustration and does not limit this invention at all. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof. For example, the base end surfaces of the base end portions 22b of the lower side portions 22 and 42 only need to have a shape that restricts the outward movement of the core in the radial direction by the case. That is, only a part of the base end face may be in contact with the case. Moreover, the attachment location of the temperature detection elements 24 and 44 is not restricted to the said form. For example, in the stator 10 of the first embodiment, the temperature detection element 24 may be attached to the inside of the side part 23 or the upper side of the lower part 22. Further, in the stator 40 of the second embodiment, the temperature detecting element 44 may be attached to the upper side of the lower side portion 42. In addition, the wiring shape is a through hole in the first embodiment and a groove in the second embodiment, but the shape is not limited to this, and the other shape may be used.

It is sectional drawing which shows the stator which concerns on a 1st form. It is a perspective view which shows a part of stator. It is sectional drawing which shows a temperature detection member. It is explanatory drawing which shows the lower side part of a temperature detection member. It is explanatory drawing which shows the side part of a temperature detection member. It is explanatory drawing which shows a mode that the stator was put in the case. It is sectional drawing which shows the stator which concerns on a 2nd form. It is sectional drawing which shows the temperature detection member which concerns on a 2nd form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,40 Stator 11 Core 12 Coil 20,41 Temperature detection member 21 Upper side part 21a Groove 21b Through-hole 22,42 Lower side part 23,43 Side part 24 Temperature detection element 30 Case 43a Vertical groove

Claims (6)

In the temperature detection element mounting member that attaches the temperature detection element to the coiled core,
A lower side portion inserted from the outer peripheral side of the core into a gap between the end surface of the core and the coil;
An outer side provided on the side opposite to the end face of the core at the portion of the lower side that remains outside the coil when inserted;
An element attachment shape for attaching a temperature detection element is formed on a surface on the coil side in a range from the lower side portion to the outer side portion. The temperature detection element mounting member according to claim 1, wherein the outer edge portion is
A side part located on the outer peripheral side of the coil;
A temperature detecting element mounting member, characterized in that the temperature detecting element mounting member is provided with an angle with respect to the side part and has an upper part located on the opposite side of the coil as viewed from the core. In the temperature detection element attachment member of Claim 1 or Claim 2,
A temperature detection element mounting member, wherein a wiring through shape is formed to allow the wiring of the temperature detection element mounted in the element mounting shape to pass outside the outer side portion. In the temperature detection member that detects the temperature by attaching to the core with coil,
A lower side portion inserted from the outer peripheral side of the core into a gap between the end surface of the core and the coil;
An outer side provided on the opposite side of the end face of the core at a portion of the lower side that remains outside the coil when inserted;
A temperature detection member having a temperature detection element attached to a coil side surface within a range from the lower side portion to the outer side portion. In a rotating electrical machine having a coiled core and a temperature detection member, the temperature detection member is:
A lower side portion inserted from the outer peripheral side of the core into a gap between the end face of the core and the coil;
Outer side provided on the opposite side of the end face of the core in the portion of the lower side remaining outside the coil at the time of insertion;
A rotating electrical machine comprising: a temperature detection element attached to a coil-side surface within a range from the lower side portion to the outer side portion. In the rotating electrical machine according to claim 5,
A rotating electrical machine comprising a case for housing the coiled core and restricting outward movement of the temperature detection member.

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