JP2013211940A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine which enables a temperature measurement element part of a thermistor to be accurately and stably attached to a stator, realizes the automation of the attachment work or improves the workability, and enables the thermistor to be attached with high reliability.SOLUTION: A rotary electric machine 100 includes: a rotor 50 formed on a rotation shaft pivotally supported; a stator core 22 disposed at an outer periphery of the rotor through a fine clearance and having multiple slots formed in a circumferential direction; a stator coil 24 composed of slot parts 26 housed in the slots and a coil end part 28 connecting end parts of the slot parts with each other; a crimp sleeve 1 making electrical connection for the stator coil; and a thermistor 30 measuring a temperature of the stator coil. The rotary electric machine 100 is formed so that a temperature measurement element part 5 of the thermistor 30 is housed in the crimp sleeve 1.

Description

  The present invention relates to a rotating electrical machine.

  Japanese Patent Laid-Open No. 2000-69715 (Patent Document 1) discloses a method for attaching a thermistor for measuring the temperature of a stator winding of a rotating electrical machine. Patent Document 1 discloses a slot conductor portion composed of a forward conductor portion and a return conductor portion alternately inserted into each slot of a core, and the same side end portion of the forward conductor portion and the return conductor portion formed integrally with the slot conductor portion. In a rotating electrical machine having a coil conductor provided with a connecting conductor portion for connecting the thermistor and having a thermistor disposed at the coil end, the coil end extends in a posture in which the thickness direction is substantially the same as the radial direction Disclosed is a rotating electrical machine in which transition conductor portions made of plates are laminated in the radial direction of the core, and a thermistor is sandwiched between a pair of conductive plates extending adjacent to each other in the radial direction of the core.

JP 2000-69715 A

  In general, the temperature measuring element portion of the thermistor including Patent Document 1 is housed in the gap between the stator windings in the coil end portion of the stator winding.

  However, since the temperature measuring element portion of the thermistor has low mechanical strength, it is generally protected by a tube or resin. In a hybrid car that is being actively developed to avoid the problem of global warming in recent years, when the rotating electrical machine that drives the vehicle is mounted in the transmission, the rotating electrical machine is replaced with an automatic transmission fluid (ATF). In order to ensure oil resistance, the temperature measuring element portion of the thermistor is often covered with some kind of protective member.

  Therefore, the temperature measuring element portion of the thermistor has a certain size, and it is not easy to fit in the gap between the stator windings. In addition, in order to reduce the dimensions of the coil end portion of the stator winding, it is common to form the coil end portion with a mold after inserting the stator winding into the stator core slot. To join. Therefore, the temperature measuring element portion of the thermistor having low mechanical strength cannot be inserted before the coil end molding.

  From these things, the temperature measuring element part of the thermistor is installed over the stator winding on the surface of the coil end part after molding the coil end part of the stator winding, and fixed with lacing yarn or adhesive, Alternatively, a dummy of the thermistor temperature measuring element portion is inserted in advance before forming the coil end portion, and the thermistor temperature measuring element portion is inserted instead of the dummy after the coil end portion is formed.

  In addition, in the case of a stator winding in which a plurality of segment conductors are connected, since the wire diameter is generally thick or a square wire, the stator winding at the coil end portion has high rigidity, and the thermistor It is difficult to form a gap for inserting the temperature measuring element part and to insert a dummy. Therefore, the temperature measuring element portion of the thermistor is generally installed over the stator winding on the surface of the coil end portion, and is fixed by lacing yarn or adhesive.

  In addition, in the mounting method of Patent Document 1, the temperature measurement element portion of the thermistor is inserted in a stator winding in which the shape of the coil end portion of the stator winding is not completely formed. Either before inserting the stator core slot part or after inserting the stator core slot part of the stator winding where the coil end shape of the stator winding is completely formed and it is difficult to form a gap It is difficult to improve workability.

  That is, these conventional thermistor mounting methods are difficult to automate and have poor workability. Also, when installing the temperature measurement element part of the thermistor over the stator winding on the surface of the coil end part, there is a problem that variations in the detected temperature of the stator tend to occur due to the contact state between the winding and the element part. is there.

  Therefore, the present invention provides a rotating electric machine that can accurately and stably attach the temperature measuring element portion of the thermistor to the stator, can automate the attachment work or improve workability, and can attach the thermistor with high reliability. The purpose is to provide.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. To give an example, a rotor configured on a rotating shaft supported by a shaft and an outer periphery of the rotor are arranged with a small gap. A stator core comprising a stator core having a plurality of slots formed in the circumferential direction, a slot portion housed in the slot, and a coil end portion connecting the end portions of the slot portion; A rotating sleeve electrically connected to the stator winding; and a thermistor for measuring the temperature of the stator winding, wherein the temperature measuring element portion of the thermistor is accommodated in the crimping sleeve. Configure.

  According to the present invention, the temperature measuring element portion of the thermistor can be accurately and stably attached to the stator, and the rotating electric machine can be attached with the thermistor with high reliability, which can automate or improve the work. Can be provided.

The perspective view which shows the shape of Embodiment 1 of this invention. The perspective view which shows the shape of Embodiment 2 and 3 of this invention. The perspective view which shows the shape of Embodiment 4 of this invention. The perspective view which shows the shape of Embodiment 5 and 6 of this invention. The perspective view which shows the shape of Embodiment 7 of this invention. The perspective view which shows the shape of Embodiment 8 and 9 of this invention. The perspective view which shows the shape of Embodiment 10 of this invention. The perspective view which shows the shape of Embodiment 11 and 12 of this invention. The perspective view which shows the shape of Embodiment 13 of this invention. Sectional drawing which shows the shape of a rotary electric machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common thing in each figure.

Embodiment 1
As shown in FIG. 10, the rotating electrical machine 100 includes a rotor 50 that is configured on a rotating shaft that is supported by a bearing 52, and a stator 20 that is disposed on the outer periphery of the rotor 50 via a minute gap. The stator 20 includes a stator core 22 having a plurality of slots formed in the circumferential direction, a slot portion 26 housed in the slot, and a coil end portion 28 that connects the end portions of the slot portion. A stator winding 24, a crimp sleeve 1 that electrically connects the stator winding, and a thermistor 30 that measures the temperature of the stator winding 24 are provided. The temperature measuring element portion 5 of the thermistor 30 is attached to the stator winding coil end portion 28 by being inserted into a gap between the stator windings 24 or by being placed over the stator winding 24 on the surface of the coil end portion. ing.

  FIG. 1 is a perspective view showing the shape of Embodiment 1 of the present invention. The crimp sleeve 1 is in the stator coil end portion 28 and electrically connects the stator coil 24. A temperature measuring element portion 5 of the thermistor is housed in the crimping sleeve 1.

  By being accommodated in the pressure-bonding sleeve 1, an insertion space for the thermistor temperature measuring element portion 5 can be secured, and coil end molding after insertion can be performed. Thereby, workability is also improved. Since the crimp sleeve 1 is electrically connected, it generates heat, and the thermistor 30 can reliably detect the temperature, and variations among individual stators are less likely to occur. Accordingly, the thermistor can be attached with high reliability.

  That is, by accommodating the temperature measuring element portion of the thermistor in the crimping sleeve, it is possible to secure a mounting space for the thermistor temperature measuring element portion at the coil end portion of the stator winding. Thereby, a thermistor can be attached correctly and stably, and workability | operativity also improves. In addition, since it can withstand the load of forming the coil end portion of the stator winding within the crimp sleeve, the thermistor can be attached before forming the coil end portion. Since the crimp sleeve is electrically connected to the stator winding to electrically connect the stator winding, the temperature rises surely, so if the temperature measuring element part of the thermistor is contained in it, the temperature Can be reliably measured, and variations in individual stators can be reduced. Thus, the thermistor can be attached with high reliability.

[Embodiment 2]
FIG. 2 is a perspective view showing the shapes of Embodiments 2 and 3 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the pressure-bonding sleeve 1, and the periphery thereof is fixed with a heat conductive resin 7.

  By being fixed by the resin 7, the mounting reliability of the thermistor temperature measuring element portion 5 is improved, and the temperature detection accuracy is improved by filling with the thermally conductive resin.

[Embodiment 3]
The basic configuration of the third embodiment is the same as that of the second embodiment, and the temperature measuring element portion 5 of the thermistor is housed in the pressure-bonding sleeve 1, and the periphery thereof is further made of a heat conductive and low hardness resin 7. It is fixed.

  By being fixed by the resin 7, the mounting reliability of the thermistor temperature measuring element portion 5 is improved, and the temperature detection accuracy is improved by filling with the thermally conductive resin. Furthermore, even if the crimping sleeve 1 is deformed by filling with a low-hardness resin, the crimping sleeve 1 is deformed by the caulking performed when the stator winding 24 of the crimping sleeve 1 is electrically connected, the thermistor temperature measuring element unit 5. Can be fixed. Accordingly, the thermistor temperature measuring element portion 5 can be inserted in advance before the crimping sleeve 1 is crimped.

[Embodiment 4]
FIG. 3 is a perspective view showing the shape of the fourth embodiment of the present invention. The thermistor temperature measuring element portion 5 is housed in the linear butt crimping sleeve 2 and is electrically connected to the stator winding 24 by crimping at one side of the linear butt crimping sleeve 2. The temperature measuring element portion 5 of the thermistor is housed in the other crimping portion. Since the linear butting crimping sleeve 2 has a long dimension and is provided with a positioning recess at the center on the inner diameter side, the stator winding crimping side and the thermistor temperature measuring element insertion portion can be clearly separated.

[Embodiment 5]
FIG. 4 is a perspective view showing the shapes of Embodiments 5 and 6 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the linear butt crimping sleeve 2, and the periphery thereof is fixed by a heat conductive resin 7.

  As in the third embodiment, fixing with the resin 7 improves the mounting reliability of the thermistor temperature measuring element unit 5 and improves the temperature detection accuracy by filling with the thermally conductive resin.

[Embodiment 6]
FIG. 4 is a perspective view showing the shapes of Embodiments 5 and 6 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the linear butt crimping sleeve 2, and the periphery thereof is fixed with a resin 7 having thermal conductivity and low hardness.

  As in the fourth embodiment, fixing with the resin 7 improves the mounting reliability of the thermistor temperature measuring element unit 5 and improves the temperature detection accuracy by filling with the thermally conductive resin. Furthermore, even if the linear butt crimping sleeve 2 is deformed by filling with a low-hardness resin so that the linear butt crimping sleeve 2 is deformed by caulking performed when the stator winding 24 of the linear butt crimping sleeve 2 is electrically connected, the thermistor temperature is reduced. The measurement element unit 5 can be fixed. Therefore, the thermistor temperature measuring element portion 5 can be inserted in advance before the straight butt crimping sleeve 2 is crimped.

[Embodiment 7]
FIG. 5 is a perspective view showing the shape of the seventh embodiment of the present invention. The crimp sleeve 1 is in a stator winding coil end portion 28 to which a plurality of segment conductors are connected, and electrically connects the stator winding 24. A temperature measuring element portion 5 of the thermistor is housed in the crimping sleeve 1.

  In the stator winding in which a plurality of segment conductors for which it is difficult to insert a dummy or to form a gap for inserting the temperature measuring element portion 5 of the thermistor or to insert a dummy by being accommodated in the crimp sleeve 1, An insertion space for the thermistor temperature measuring element unit 5 can be secured. Thereby, workability is improved and automation is facilitated. Since the crimp sleeve 1 is electrically connected, it generates heat, and the thermistor 30 can reliably detect the temperature, and variations among individual stators are less likely to occur. As a result, a highly reliable thermistor mounting method can be obtained.

[Embodiment 8]
FIG. 6 is a perspective view showing the shapes of Embodiments 8 and 9 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the pressure-bonding sleeve 1, and the periphery thereof is fixed with a heat conductive resin 7.

  By being fixed by the resin 7, the mounting reliability of the thermistor temperature measuring element portion 5 is improved, and the temperature detection accuracy is improved by filling with the thermally conductive resin.

[Embodiment 9]
FIG. 6 is a perspective view showing the shapes of Embodiments 8 and 9 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the pressure-bonding sleeve 1, and the periphery thereof is fixed with a resin 7 having thermal conductivity and low hardness.

  By being fixed by the resin 7, the mounting reliability of the thermistor temperature measuring element portion 5 is improved, and the temperature detection accuracy is improved by filling with the thermally conductive resin. Furthermore, even if the crimping sleeve 1 is deformed by filling the low-stiffness resin and the crimping sleeve 1 is electrically connected to the segment stator winding 24 of the crimping sleeve 1, the thermistor temperature measuring element portion 5 can be maintained. Accordingly, the thermistor temperature measuring element portion 5 can be inserted in advance before the crimping sleeve 1 is crimped.

[Embodiment 10]
FIG. 7 is a perspective view showing the shape of the tenth embodiment of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the linear butt crimping sleeve 2 and is electrically connected to the segment stator winding 24 by crimping at one side of the linear butt crimping sleeve 2. The temperature measuring element portion 5 of the thermistor is housed in the other crimping portion. Since the linear butting crimping sleeve 2 has a long dimension and is provided with a positioning recess at the center on the inner diameter side, the segment stator winding crimping side and the thermistor temperature measurement element insertion portion can be clearly separated.

[Embodiment 11]
FIG. 8 is a perspective view showing the shapes of Embodiments 11 and 12 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the linear butt crimping sleeve 2, and the periphery thereof is fixed by a heat conductive resin 7.

  As in the ninth embodiment, fixing with the resin 7 improves the mounting reliability of the thermistor temperature measuring element unit 5 and improves the temperature detection accuracy by filling with the thermally conductive resin.

[Embodiment 12]
FIG. 8 is a perspective view showing the shapes of Embodiments 11 and 12 of the present invention. The temperature measuring element portion 5 of the thermistor is housed in the linear butt crimping sleeve 2, and the periphery thereof is fixed with a resin 7 having thermal conductivity and low hardness.

  As in the ninth embodiment, fixing with the resin 7 improves the mounting reliability of the thermistor temperature measuring element unit 5 and improves the temperature detection accuracy by filling with the thermally conductive resin. Furthermore, even if the linear butt crimping sleeve 2 is deformed by filling with a low-hardness resin, the linear butt crimping sleeve 2 is deformed by the caulking performed when the segment stator winding 24 of the linear butt crimping sleeve 2 is electrically connected. The fixing of the temperature measuring element unit 5 can be maintained. Therefore, the thermistor temperature measuring element portion 5 can be inserted in advance before the straight butt crimping sleeve 2 is crimped.

[Embodiment 13]
FIG. 9 is a perspective view showing the shape of the thirteenth embodiment of the present invention. The crimp sleeve 1 is in a stator winding coil end portion 28 to which a plurality of segment conductors are connected, and electrically connects the neutral points of the stator winding 24.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 Crimp sleeve 2 Crimp sleeve 5 for linear butt | matching Thermistor temperature measurement element part 7 Resin 20 Stator 22 Stator core 24 Stator winding 26 Stator winding slot part 28 Stator winding coil end part 30 Thermistor 50 Rotor 52 Bearing 100 Rotating electric machine

Claims (6)

A rotor configured on a pivotally supported rotating shaft;
A stator core having slots formed on the outer periphery of the rotor via minute gaps and formed in the circumferential direction; and
A stator winding comprising a slot portion housed in the slot and a coil end portion connecting the end portions of the slot portion;
A crimp sleeve for electrically connecting the stator windings;
In a rotating electrical machine comprising a thermistor for measuring the temperature of the stator winding,
A rotating electrical machine in which a temperature measuring element portion of the thermistor is housed in the crimping sleeve. In the rotating electrical machine according to claim 1,
A rotating electrical machine in which the temperature measuring element portion is fixed by a heat conductive resin filled in the crimp sleeve. The rotating electrical machine according to claim 2,
A rotating electrical machine in which the hardness of the thermally conductive resin is lower than the hardness of the temperature measuring element portion. In the rotary electric machine according to any one of claims 1 to 3,
The pressure-bonding sleeve is a pressure-bonding sleeve for linear abutment,
A rotating electrical machine in which the stator winding is electrically connected by crimping at one crimping portion of the linear butt crimping sleeve, and the temperature measuring element portion of the thermistor is housed in the other crimping portion. The rotating electrical machine according to any one of claims 1 to 4,
A rotating electrical machine in which the stator winding is configured by connecting a plurality of segment conductors. In the rotating electrical machine according to claim 5,
A rotating electrical machine in which the crimp sleeve electrically connects neutral points of the stator windings by caulking.