CN114389409A - Rotating electrical machine - Google Patents
Rotating electrical machine Download PDFInfo
- Publication number
- CN114389409A CN114389409A CN202111186628.1A CN202111186628A CN114389409A CN 114389409 A CN114389409 A CN 114389409A CN 202111186628 A CN202111186628 A CN 202111186628A CN 114389409 A CN114389409 A CN 114389409A
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- China
- Prior art keywords
- temperature sensor
- coil conductor
- sensor
- recess
- coil
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
Abstract
A rotating electrical machine in which the deviation of the mounting position of a temperature sensor and the deformation of the temperature sensor are suppressed to improve the reliability of the temperature sensor and the rotating electrical machine. The method comprises the following steps: a rotor having an excitation core around which an excitation winding is wound; a stator having a stator core and a stator coil; a temperature sensor that detects a temperature of the stator coil; and a mounting member that mounts the temperature sensor to the stator coil, wherein a part of a coil conductor of the stator coil, which extends linearly, is recessed in a direction orthogonal to an extending direction of the coil conductor to have a recess on a surface of the coil conductor, wherein a sensor portion of the temperature sensor is disposed on a side of the coil conductor where the recess is provided, and wherein the mounting member incorporates the sensor portion of the temperature sensor and has a protruding portion that abuts against the recess.
Description
Technical Field
The present application relates to a rotating electric machine.
Background
The rotating electric machine includes a rotor and a stator having a stator core and a stator coil. The rotating electrical machine operates as an electric motor that drives the internal combustion engine, and functions as a generator that is driven by the internal combustion engine to generate electric power. When the rotating electric machine operates as a motor, a current flows through the stator coil. At this time, if the stator coil generates heat due to the current flowing through the stator coil, the temperature of the stator coil rises. If the temperature of the stator coil excessively rises, the stator coil and components provided around the stator coil may be damaged. Therefore, a temperature sensor for detecting the temperature of the stator coil is provided in the stator coil, and the current flowing through the stator coil is controlled based on the temperature detected by the temperature sensor, so as to prevent the occurrence of component damage due to excessive temperature rise of the stator coil.
As a structure of a temperature sensor provided in a stator coil, the following structure is disclosed: a bent portion bent in a U-shape so as to face a coil conductor of a stator coil is provided in the stator coil, and a temperature sensor is brought into contact with the stator coil at a gap portion of the bent portion, and the temperature sensor is fixed by sandwiching and holding the two by a fixing member (for example, see patent document 1). Since the temperature sensor is in contact with the stator coil at the bent portion, the temperature sensor can detect the temperature of the stator coil.
The stator coil to which the temperature sensor is provided has a temperature deviation along the extending direction of the coil conductor forming the stator coil. Therefore, in order to accurately measure the temperature of the stator coil by the temperature sensor, it is necessary to suppress a displacement of the position where the temperature sensor is attached with respect to the extending direction of the coil conductor.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-225959
In patent document 1, the temperature sensor is held by sandwiching the temperature sensor by a gap of the stator coil bent in a U shape, and the temperature sensor is fixed by a fixing member, thereby suppressing the displacement of the mounting position of the temperature sensor. However, it is necessary to form the bent portion in a state of being slightly opened to allow the temperature sensor to be inserted, and after the temperature sensor is inserted, the coil conductor of the bent portion is pushed back in order to press the temperature sensor. Therefore, there are the following technical problems: due to the difference in the opening amount of the bent portion before the temperature sensor is inserted and the difference in the hardness of the coil conductor, even if the coil conductor is pressed with the same force, the force with which the temperature sensor is pressed by the coil conductor varies, and the temperature sensor cannot be completely pressed, so that the mounting position of the temperature sensor with respect to the extending direction of the coil conductor is displaced.
Further, there are technical problems as follows: since the mounting position of the temperature sensor is displaced, the measured temperature of the stator coil is deviated, and the accurate temperature of the stator coil cannot be measured, and the reliability of the temperature sensor is lowered. Further, when the pressing members press both sides of the coil conductor while the temperature sensor is held in the gap of the bent portion of the coil, the temperature sensor may be deformed due to a load applied to the temperature sensor by excessive pressing of the pressing members. When the temperature sensor is deformed, the temperature sensor cannot measure the accurate temperature of the stator coil, and there is a problem that the reliability of the temperature sensor is lowered. Further, if the reliability of the temperature sensor is lowered, it is not possible to suppress the occurrence of damage to the components included in the rotating electrical machine, and therefore there is a technical problem that the reliability of the rotating electrical machine is lowered.
Disclosure of Invention
Therefore, an object of the present invention is to obtain a rotating electrical machine in which the deviation of the mounting position of a temperature sensor included in the rotating electrical machine and the deformation of the temperature sensor are suppressed, so that the reliability of the temperature sensor and the rotating electrical machine is improved.
The disclosed rotating electrical machine includes: a rotor having an excitation core around which an excitation winding is wound and rotating integrally with a rotating shaft; a stator having a cylindrical stator core disposed radially outside the excitation core portion and a stator coil disposed in a slot formed in the stator core; a temperature sensor that detects a temperature of the stator coil; and a mounting member that mounts the temperature sensor to the stator coil, wherein a part of a coil conductor of the stator coil, which extends linearly, is recessed in a direction orthogonal to an extending direction of the coil conductor to have a recess on a surface of the coil conductor, wherein a sensor portion of the temperature sensor is disposed on a side of the coil conductor where the recess is provided, and wherein the mounting member incorporates the sensor portion of the temperature sensor and has a protruding portion that abuts against the recess.
According to the rotating electric machine disclosed in the present application, the stator coil has the recess on the surface of the coil conductor, the sensor portion of the temperature sensor is disposed on the side of the coil conductor where the recess is provided, and the mounting member incorporates the sensor portion of the temperature sensor and has the protruding portion that abuts against the recess. Since no member for pressing the temperature sensor is used for mounting the temperature sensor, deformation of the temperature sensor can be suppressed. Since the deviation of the mounting position of the temperature sensor and the deformation of the temperature sensor are suppressed, the reliability of the temperature sensor and the rotating electric machine can be improved.
Drawings
Fig. 1 is a perspective view showing an outline of a rotating electric machine according to embodiment 1.
Fig. 2 is a cross-sectional view parallel to the axial direction, schematically showing a rotary electric machine according to embodiment 1.
Fig. 3 is a perspective view of a main part showing an outline of a rotating electric machine according to embodiment 1.
Fig. 4 is a perspective view of an attachment wire, a temperature sensor, and a mounting member of the rotating electric machine of embodiment 1.
Fig. 5 is a front view of an attachment wire, a temperature sensor, and a mounting member of the rotating electric machine of embodiment 1.
Fig. 6 is a plan view of an attachment wire, a temperature sensor, and a mounting member of the rotating electric machine according to embodiment 1.
Fig. 7 is a sectional view of the additional line, the temperature sensor, and the mounting member cut at the a-a sectional position of fig. 6.
Fig. 8 is a sectional view of an additional wire, a temperature sensor, and a mounting member of the rotating electric machine according to embodiment 2.
Fig. 9 is a cross-sectional view of the attachment wire and the mounting member cut at the B-B cross-sectional location of fig. 8.
Fig. 10 is a cross-sectional view of an additional line and another mounting member taken at the B-B cross-sectional location of fig. 8.
Fig. 11 is a sectional view of an attachment wire, a temperature sensor, and a mounting member of a rotary electric machine according to embodiment 3.
Fig. 12 is a plan view of an attachment wire, a temperature sensor, and a mounting member of a rotary electric machine according to embodiment 4.
Fig. 13 is a cross-sectional view of the additional line, the temperature sensor, and the mounting member cut at the C-C cross-sectional position of fig. 12.
Fig. 14 is a sectional view of an additional wire, a temperature sensor, and a mounting member of the rotating electric machine according to embodiment 5.
Fig. 15 is a sectional view of an attachment wire, a temperature sensor, and a mounting member of a rotary electric machine of embodiment 6.
Fig. 16 is a sectional view of an additional wire, a temperature sensor, and a mounting member of a rotary electric machine according to embodiment 7.
Fig. 17 is a front view of an additional wire, a temperature sensor, and a mounting member of the rotary electric machine of embodiment 8.
Fig. 18 is a cross-sectional view of the additional line, the temperature sensor, and the mounting member cut at the D-D cross-sectional position of fig. 17.
(symbol description)
1 rotating an electric machine;
2, a stator;
3, a rotor;
4, a shell;
5, an axis;
6a bearings;
6b a bearing;
7 a stator core;
8 stator coils;
9 a rotor core;
11 a temperature sensor;
12 a sensor section;
13 mounting a component;
13a projection;
14a sensor holding part;
14a projection;
15a fixing member;
15a projection;
101 an additional line;
102a main body portion;
102a surface;
102b side surface;
102c opposite side;
103 a rising part;
104a recess;
104a bottom;
105 a conductor part;
106 insulating coating;
111 an additional line;
112 a body portion;
a 113 rising part;
114, and a recess.
Detailed Description
Hereinafter, a rotating electric machine according to an embodiment of the present application will be described with reference to the drawings. In the drawings, the same or corresponding members and portions are denoted by the same reference numerals.
Fig. 1 is a perspective view showing an outline of a rotary electric machine 1 according to embodiment 1, fig. 2 is a sectional view showing an outline of the rotary electric machine 1 and being parallel to an axial direction of the rotary electric machine 1, fig. 3 is a main part perspective view of a portion enclosed by a broken line of fig. 1 to which a temperature sensor 11 and a mounting member 13 of the rotary electric machine 1 are attached, fig. 4 is a perspective view of an additional line 101, the temperature sensor 11 and the mounting member 13 of the rotary electric machine 1, fig. 5 is a front view of the additional line 101, the temperature sensor 11 and the mounting member 13 of the rotary electric machine 1, fig. 6 is a plan view of the additional line 101, the temperature sensor 11 and the mounting member 13 of the rotary electric machine 1, and fig. 7 is a sectional view of the additional line 101, the temperature sensor 11 and the mounting member 13 cut at a-a sectional position of fig. 6. The rotating electrical machine 1 has a stator 2 including a stator core 7 and a stator coil 8, and a rotor 3, and operates as an electric motor that drives an internal combustion engine (not shown). Alternatively, the rotating electrical machine 1 functions as a generator driven by the internal combustion engine to generate electric power.
< rotating electric machine 1 >
The rotor 3 has a rotor core 9, and rotates integrally with the shaft 5 as a rotating shaft, and the rotor core 9 is a field core portion around which a field winding (not shown) is wound. As shown in fig. 2, the rotor 3 includes a bearing 6a on one end side in the axial direction of the shaft 5 and a bearing 6b on the other end side. The rotor 3 is rotatably supported by a bracket (not shown) via bearings 6a and 6b fixed to the shaft 5. The rotor core 9 is fixed to the shaft 5 by press fitting or the like. The rotor core 9 is disposed in an inner space surrounded by the stator core 7. The outer peripheral surface of rotor core 9 faces the inner peripheral surface of stator core 7 with a gap therebetween.
The stator 2 has: a cylindrical stator core 7 disposed radially outside the rotor core 9; and a stator coil 8 of a plurality of phases, which is an armature coil, disposed in a slot (not shown) formed in the stator core 7. The stator core 7 is disposed inside the case 4 formed in a cylindrical shape. The stator coil 8 is formed of a coil conductor. The coil conductor includes: a conductor part; and an insulating coating film provided so as to surround the conductor portion. The cross section of the coil conductor is rectangular or circular. The stator coil 8 includes a coil portion (not shown) and an additional wire 101. The coil portion is a portion around which a coil conductor is wound, and is inserted into a slot formed between adjacent teeth of the stator core 7. The end portions of the coil conductors forming the coil portions protrude from the stator core 7 toward one axial side. The additional wire 101 is a coil conductor connecting between both end portions of the coil portion. In the present embodiment, as shown in fig. 3, a temperature sensor 11 and a mounting member 13 are provided on an additional wire 101, and the temperature sensor 11 measures the temperature of the stator coil 8. In addition, the temperature sensor 11 and the mounting member 13 are omitted in fig. 1 and 2.
The stator coil 8 of the plurality of phases is, for example, a set of three-phase windings or two sets of three-phase windings, but is not limited thereto and is set according to the type of the rotating electric machine 1. When the stator coil 8 is a three-phase coil, the rotating electric machine 1 supplies three-phase ac power to the stator coil 8, thereby generating a rotating magnetic field in the stator 2. The rotor 3 rotates due to interaction between a magnetic flux generated by the field pole provided in the rotor 3 and the rotating magnetic field.
< temperature sensor 11 and mounting Member 13 >
The temperature sensor 11 and the mounting member 13, which are essential parts of the present application, will be explained. The rotating electric machine 1 includes: a temperature sensor 11 that detects the temperature of the stator coil 8; and a mounting member 13 for mounting the temperature sensor 11 to the stator coil 8. As shown in fig. 4, the temperature sensor 11 and the mounting member 13 are provided to an additional wire 101 of the stator coil 8. The additional wire 101 of the stator coil 8 includes: a main body portion 102 as a portion of a coil conductor extending linearly; and a rising portion 103 as a portion of the coil conductor connected to an end of the coil portion. A portion of the main body 102 of the additional line 101 extending linearly is recessed in a direction orthogonal to the extending direction of the main body 102 and has a recess 104 on the surface of the main body 102. As shown in fig. 7, a portion of the main body 102 extending linearly is bent in a direction orthogonal to the extending direction of the main body 102, and a concave portion 104 in the present embodiment is formed on the surface of the main body 102. Although the recess 104 is provided at the center of the main body portion 102, the position at which the recess 104 is provided is not limited to the center of the main body portion 102, and may be other positions.
The temperature sensor 11 includes a sensor portion 12 as a portion that detects temperature. The sensor portion 12 of the temperature sensor 11 is disposed on the side of the main body portion 102 where the recess 104 is provided. The temperature sensor 11 is, for example, a thermistor whose resistance value changes with respect to a temperature change. The temperature sensor 11 is connected to a control unit (not shown) that controls electric power supplied to the rotating electric machine 1. The control unit controls the current flowing through the stator coil 8 based on the temperature detected by the temperature sensor 11 so as to suppress the occurrence of damage to the stator coil 8 or components provided around the stator coil 8 due to an excessive temperature rise of the stator coil 8.
The mounting member 13 incorporates the sensor portion 12 of the temperature sensor 11 and has a protruding portion 13a that abuts against the recess 104. The mounting member 13 protects the sensor portion 12 of the temperature sensor 11 from the outside. The mounting member 13 is mounted to the main body 102 so as to cover a part or all of the portion of the main body 102 where the recess 104 is formed. In the present embodiment, the mounting member 13 covers a part of the surface of the main body 102 on the side where the recess 104 is provided and a part of the side surface of the main body 102 on both sides of the recess 104. The mounting member 13 is, for example, a molded resin made of an insulating material. The mounting member 13 is provided on the main body portion 102 by bonding the protruding portion 13a of the mounting member 13 of the sensor portion 12 incorporating the temperature sensor 11 to the recessed portion 104. The arrangement of the mounting member 13 is not limited to the adhesion of the protruding portion 13a to the recessed portion 104. The mounting member 13 may be provided by integrally molding the sensor portion 12 of the temperature sensor 11 and a part of the main body portion 102 where the recess 104 is formed.
According to this configuration, the position of the sensor portion 12 of the temperature sensor 11 incorporated in the mounting member 13 is determined by the recess 104 of the main body portion 102 and the protrusion 13a abutting against the recess 104 of the mounting member 13, and the deviation of the mounting position of the temperature sensor 11 with respect to the additional wire 101 can be suppressed. Further, since no member for pressing the temperature sensor 11 is used for mounting the temperature sensor 11, deformation of the temperature sensor 11 can be suppressed. Since the deviation of the mounting position of the temperature sensor 11 and the deformation of the temperature sensor 11 are suppressed, the reliability of the temperature sensor 11 can be improved.
Although in the present embodiment, the temperature sensor 11 and the mounting member 13 are provided to the main body portion 102 of the additional wire 101 of the stator coil 8, the arrangement of the temperature sensor 11 and the mounting member 13 with respect to the stator coil 8 is not limited to the main body portion 102. If the recess is formed in the coil conductor, the displacement of the mounting positions of the temperature sensor 11 and the mounting member 13 can be suppressed, and the temperature sensor 11 and the mounting member 13 can be provided in the coil conductor. Therefore, a recess may be formed in the rising portion 103 of the additional wire 101 of the stator coil 8 or the coil portion of the stator coil 8, and the temperature sensor 11 and the mounting member 13 may be provided in the rising portion 103 or the coil portion. Since the temperature sensor 11 and the mounting member 13 can be disposed at any position of the stator coil 8, the temperature sensor 11 and the mounting member 13 can be disposed at a position where the temperature of the stator coil 8 may rise. Therefore, the temperature sensor 11 can realize control under the worst condition of the temperature of the stator coil 8, and can improve the reliability of the rotating electric machine 1.
As described above, in the rotating electric machine 1 according to embodiment 1, the stator coil 8 has the recessed portion 104 on the surface of the coil conductor, the sensor portion 12 of the temperature sensor 11 is disposed on the side of the coil conductor where the recessed portion 104 is provided, and the mounting member 13 incorporates the sensor portion 12 of the temperature sensor 11 and has the protruding portion 13a that abuts against the recessed portion 104, so that the position of the sensor portion 12 of the temperature sensor 11 incorporated in the mounting member 13 is determined by the recessed portion 104 and the protruding portion 13a that abuts against the recessed portion 104 of the mounting member 13, and thus, the deviation of the mounting position of the temperature sensor 11 with respect to the coil conductor can be suppressed. Further, since no member for pressing the temperature sensor 11 is used for mounting the temperature sensor 11, deformation of the temperature sensor 11 can be suppressed. Since the deviation of the mounting position of the temperature sensor 11 and the deformation of the temperature sensor 11 are suppressed, the temperature sensor 11 can measure the accurate temperature of the stator coil 8. Since the accurate temperature of the stator coil 8 can be measured, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
When the mounting member 13 is mounted to the coil conductor so as to cover a part of the portion of the coil conductor where the recess 104 is formed, the mounting member 13 can stably mount the temperature sensor 11 to the recess 104, and can further suppress the displacement of the mounting position of the temperature sensor 11 with respect to the coil conductor. Further, in the case where a part of the coil conductor linearly extending is bent in a direction orthogonal to the extending direction of the coil conductor and the recess 104 is formed on the surface of the coil conductor, the recess 104 can be easily formed at the coil conductor. Further, the shape of the recess 104 is not affected by the hardness of the coil conductor regardless of the shape accuracy as long as the shape is in contact with the protrusion 13a, and high-accuracy molding is not required in forming the recess 104. Therefore, even in the case of the conductor coils having different hardness, it is possible to reliably suppress variation in the mounting position of the temperature sensor 11, to perform accurate temperature measurement, to improve the reliability of the temperature sensor 11, and to reduce the processing cost of the rotating electrical machine 1 because the coil conductors are easily molded.
The number of coil conductors required for fixing the temperature sensor 11 is only one, and it is not necessary to dispose the coil conductors on both sides of the temperature sensor 11. Therefore, the structure in which the temperature sensor 11 and the mounting member 13 are mounted on the coil conductor saves space, and the rotating electric machine 1 can be downsized.
A rotating electric machine 1 according to embodiment 2 will be described. Fig. 8 is a sectional view of an additional line 101, a temperature sensor 11, and a mounting member 13 of a rotary electric machine 1 of embodiment 2, cut at the same position as the a-a sectional position of fig. 6, fig. 9 is a sectional view of the additional line 101 and the mounting member 13, cut at the B-B sectional position of fig. 8, and fig. 10 is a sectional view of the additional line 101 and another mounting member 13, cut at the B-B sectional position of fig. 8. The rotating electric machine 1 according to embodiment 2 is configured such that the mounting member 13 covers the surface 102c of the body 102 on the side opposite to the surface on which the recess 104 is provided.
As shown in fig. 8, the mounting member 13 is mounted to the main body 102 so as to cover the entire portion of the main body 102 where the recess 104 is formed. As shown in fig. 9, the mounting member 13 abuts against a surface 102a of the main body 102 on a part of the side where the recess 104 is provided, side surfaces 102b on both sides of the recess 104, and a surface 102c on the opposite side of the surface where the recess 104 is provided. By bringing the surface 102c on the opposite side of the surface on the side where the recess 104 is provided into contact with the mounting member 13, the mounting member 13 can more stably mount the temperature sensor 11 to the recess 104, and the deviation of the mounting position of the temperature sensor 11 with respect to the additional wire 101 can be further suppressed.
Although the present embodiment shows a configuration in which the mounting member 13 covers the entire surface 102c on the opposite side of the surface of the main body portion 102 on which the recess 104 is provided, the present invention is not limited to a configuration in which the mounting member 13 covers the entire surface 102c on the opposite side. As shown in fig. 10, the mounting member 13 may cover a part of the surface 102c on the opposite side. Even in the configuration in which the mounting member 13 covers a part of the surface 102c on the opposite side, the displacement of the mounting position of the temperature sensor 11 can be further suppressed.
As described above, in the rotating electrical machine 1 according to embodiment 2, the mounting member 13 is mounted to the main body portion 102 so as to cover the entire portion of the main body portion 102 where the recess 104 is formed, and therefore, the mounting member 13 can stably mount the temperature sensor 11 to the recess 104, and thus, the displacement of the mounting position of the temperature sensor 11 with respect to the additional wire 101 can be further suppressed. Since the deviation of the mounting position of the temperature sensor 11 can be further suppressed, the temperature sensor 11 can measure the temperature of the stator coil 8 more accurately. Since the accurate temperature of the stator coil 8 can be measured, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
A rotating electric machine 1 according to embodiment 3 will be described. Fig. 11 is a cross-sectional view of the additional wire 101, the temperature sensor 11, and the mounting member 13 of the rotating electric machine 1 of embodiment 3, cut at the same position as the a-a cross-sectional position of fig. 6. The rotating electric machine 1 according to embodiment 3 has a configuration in which the sensor unit 12 of the temperature sensor 11 is arranged differently.
The sensor portion 12 of the temperature sensor 11 is disposed at a position facing the bottom portion 104a of the recess 104. In embodiment 1, as shown in fig. 7, the sensor portion 12 of the temperature sensor 11 is disposed at an end portion of the recess 104. When the sensor unit 12 is disposed so as to deviate from the end of the recess 104 toward the bottom 104a, the distance between the sensor unit 12 and the main body 102 increases. When the sensor unit 12 is disposed offset from the end of the recess 104 toward the side opposite to the bottom 104a, the distance between the sensor unit 12 and the main body 102 decreases. As described above, the distance between the sensor part 12 and the main body part 102 varies due to a slight displacement in the arrangement of the sensor part 12, and therefore, the temperature of the stator coil 8 may not be accurately measured. In the present embodiment, since the sensor unit 12 is disposed at a position facing the bottom portion 104a of the recess 104, the distance between the sensor unit 12 and the main body portion 102 does not change even if the sensor unit 12 is displaced. Therefore, the sensor unit 12 can measure the temperature of the stator coil 8 more accurately.
As described above, in the rotating electrical machine 1 according to embodiment 3, the sensor unit 12 of the temperature sensor 11 is disposed at a position facing the bottom portion 104a of the concave portion 104, and therefore, even if the sensor unit 12 is displaced, the distance between the sensor unit 12 and the main body portion 102 does not change, and the sensor unit 12 can measure the temperature of the stator coil 8 more accurately. Since the accurate temperature of the stator coil 8 can be measured, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
A rotating electric machine 1 according to embodiment 4 will be described. Fig. 12 is a plan view of an additional line 101, a temperature sensor 11, and a mounting member 13 of the rotating electric machine 1 according to embodiment 4, and fig. 13 is a sectional view of the additional line 101, the temperature sensor 11, and the mounting member 13 cut at a section position C-C in fig. 12. In the rotating electric machine 1 according to embodiment 4, the attachment member 13 is configured by the sensor holding portion 14 and the fixing member 15.
The mounting member 13 includes a sensor holding portion 14 and a fixing member 15. The sensor holding portion 14 has a protruding portion 14a that abuts against the recessed portion 104. The sensor holding portion 14 incorporates the sensor portion 12 of the temperature sensor 11. The fixing member 15 fixes the sensor holding portion 14 to the additional wire 101, which is a coil conductor, so as to integrally surround the sensor holding portion 14 and a portion of the additional wire 101 where the recess 104 is formed. The sensor holding portion 14 and the fixing member 15 are formed of an insulating material, such as a molded resin. The sensor holding portion 14 and the fixing member 15 protect the sensor portion 12 of the temperature sensor 11 from the outside.
The sensor holding portion 14 is provided to the main body portion 102 of the additional wire 101 by bonding the protruding portion 14a of the sensor holding portion 14 incorporating the sensor portion 12 to the recessed portion 104. The arrangement of the sensor holding portion 14 is not limited to the adhesion of the protruding portion 14a to the recessed portion 104. The sensor holding portion 14 may be provided by integrally molding the sensor portion 12 of the temperature sensor 11 with a part of the main body portion 102 where the recess 104 is formed. The fixing member 15 is provided by integral molding so as to integrally surround the portion of the additional wire 101 where the recess 104 is formed and the sensor holding portion 14.
As described above, in the rotary electric machine 1 according to embodiment 4, the mounting member 13 includes the sensor holding portion 14 and the fixing member 15, and the fixing member 15 fixes the sensor holding portion 14 to the additional wire 101 in such a manner as to integrally surround the portion of the additional wire 101 where the recess 104 is formed and the sensor holding portion 14, and therefore, the fixation of the sensor holding portion 14 to the portion of the additional wire 101 where the recess 104 is formed is further strengthened, and thus, the deviation of the mounting position of the temperature sensor 11 to the additional wire 101 can be further suppressed. Since the deviation of the mounting position of the temperature sensor 11 can be further suppressed, the temperature sensor 11 can measure the temperature of the stator coil 8 more accurately. Since the accurate temperature of the stator coil 8 can be measured, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
A rotating electric machine 1 according to embodiment 5 will be described. Fig. 14 is a cross-sectional view of the additional wire 101, the temperature sensor 11, and the mounting member 13 of the rotating electric machine 1 of embodiment 5, cut at the same position as the C-C cross-sectional position of fig. 12. The rotating electric machine 1 according to embodiment 5 is different from that according to embodiment 4 in the shape of the sensor holding portion 14.
The mounting member 13 includes a sensor holding portion 14 and a fixing member 15. The sensor holding portion 14 incorporates the sensor portion 12 of the temperature sensor 11. The shape of the sensor holding portion 14 is, for example, a rectangular parallelepiped, but is not limited thereto, and may be a cylindrical shape. The fixing member 15 fixes the sensor holding portion 14 to the additional wire 101, which is a coil conductor, so as to integrally surround the sensor holding portion 14 and a portion of the additional wire 101 where the recess 104 is formed, and has a protruding portion 15a which abuts against the recess 104. The sensor holding portion 14 and the fixing member 15 are formed of an insulating material, such as a molded resin. The sensor holding portion 14 and the fixing member 15 protect the sensor portion 12 of the temperature sensor 11 from the outside.
The fixing member 15 is provided by integrally surrounding and integrally molding the portion of the additional wire 101 where the concave portion 104 is formed and the sensor holding portion 14 in a state where the sensor holding portion 14 is relatively positioned and held to the portion of the additional wire 101 where the concave portion 104 is formed. The fixing member 15 is filled between the recess 104 and the sensor holding portion 14. Since the fixing member 15 is filled between the recess 104 and the sensor holding portion 14, the air layer formed between the recess 104 and the sensor holding portion 14 can be buried by the fixing member 15. Since the formation of the air layer between the recess 104 and the sensor holding portion 14 is suppressed, the variation in the detected temperature of the stator coil 8 due to the influence of the air layer is suppressed.
As described above, in the rotary electric machine 1 according to embodiment 5, the mounting member 13 includes the sensor holding portion 14 and the fixing member 15, and the fixing member 15 fixes the sensor holding portion 14 to the coil conductor in such a manner as to integrally surround the portion of the additional wire 101 where the recess 104 is formed and the sensor holding portion 14, and therefore, the fixation of the sensor holding portion 14 to the portion of the additional wire 101 where the recess 104 is formed is further strengthened, and thus, the displacement of the mounting position of the temperature sensor 11 to the additional wire 101 can be further suppressed. Further, since the fixing member 15 is filled between the recess 104 and the sensor holding portion 14, formation of an air layer between the recess 104 and the sensor holding portion 14 is suppressed, and thus, variation in the detected temperature due to the influence of the air layer is suppressed. Since the variation in the detected temperature detected by the temperature sensor 11 is suppressed, the temperature sensor 11 can measure a more accurate temperature of the stator coil 8. Since the accurate temperature of the stator coil 8 can be measured, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
Embodiment 6
A rotating electric machine 1 according to embodiment 6 will be described. Fig. 15 is a cross-sectional view of the additional wire 101, the temperature sensor 11, and the mounting member 13 of the rotating electric machine 1 of embodiment 6, cut at the same position as the a-a cross-sectional position of fig. 6. The rotating electric machine according to embodiment 6 has a structure in which the cross-sectional area of the portion of the coil conductor where the recess 104 is formed is different from that of the other portions.
By making the sectional area of a part of the additional wire 101, which is a coil conductor, smaller than the sectional areas of the front and rear of a part of the additional wire 101, the concave portion 104 is formed on the surface of the additional wire 101 while being recessed in the direction orthogonal to the extending direction of the additional wire 101. By reducing the cross-sectional area of a part of the additional line 101, the resistance of the additional line 101 at a portion having a small cross-sectional area can be increased.
As described above, in the rotating electrical machine 1 according to embodiment 6, the recessed portion 104 is formed by reducing the cross-sectional area of a part of the additional wire 101, and the resistance of the recessed portion 104 increases, so that the temperature sensor 11 can measure the temperature of a high-temperature portion of the stator coil 8 which is provided for purpose. The temperature sensor 11 can measure the temperature of a high-temperature portion of the stator coil 8, and therefore, the reliability of the rotating electric machine 1 can be improved.
A rotating electric machine 1 according to embodiment 7 will be described. Fig. 16 is a cross-sectional view of an additional wire 101, a temperature sensor 11, and a mounting member 13 of the rotating electric machine 1 of embodiment 7, cut at the same position as the a-a cross-sectional position of fig. 6. The rotating electric machine 1 according to embodiment 7 has a structure in which the insulating coating 106 of the coil conductor at the portion where the recess 104 is formed is removed.
The coil conductor includes: a conductor part 105; and an insulating coating 106 provided so as to surround the conductor portion 105. At the portion of the additional wire 101 as the coil conductor where the recess 104 is formed, the insulating coating 106 is removed from the additional wire 101. In this embodiment mode, the cross-sectional area of a part of the additional line 101 is reduced by removing the insulating coating 106 from a part of the additional line 101, thereby forming the recess 104. The structure of the recess 104 from which the insulating coating 106 is removed is not limited to this. As described in embodiment 1, the insulating coating 106 may be removed at a portion of the recess 104 formed on the surface of the main body 102 by bending in a direction orthogonal to the extending direction of the main body 102. By removing the insulating coating 106, the thermal resistance around the additional wire 101 can be reduced.
As described above, in the rotating electrical machine 1 according to embodiment 7, since the insulating coating 106 is removed from the additional wire 101 at the portion of the additional wire 101 where the recess 104 is formed, the thermal resistance around the additional wire 101 can be reduced, and therefore the temperature sensor 11 can more accurately measure the temperature of the conductor portion 105 itself of the additional wire 101. Since the temperature sensor 11 can measure the temperature of the stator coil 8 more accurately, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
A rotating electric machine 1 according to embodiment 8 will be described. Fig. 17 is a front view of additional lines 101, 111, a temperature sensor 11, and a mounting member 13 of a rotary electric machine 1 according to embodiment 8, and fig. 18 is a sectional view of the additional lines 101, 111, the temperature sensor 11, and the mounting member 13 cut at a D-D sectional position of fig. 17. The rotating electric machine 1 according to embodiment 8 has a structure in which the temperature sensor 11 is disposed between the two concave portions 104 and 114.
The stator coil 8 includes two linear additional wires 101 and 111 as coil conductors facing each other at a distance. Like the additional wire 101, the additional wire 111 includes a main body portion 112 and a rising portion 113. As shown in fig. 18, concave portions 104 and 114 are formed in the portions of the additional lines 101 and 111 facing each other, respectively, so as to widen the interval. The temperature sensor 11 is disposed between the two concave portions 104 and 114. Since the concave portions 104 and 114 are disposed on both sides of the temperature sensor 11, the heat receiving area of the temperature sensor 11 can be increased.
Although the temperature sensor 11 is disposed between the concave portions 104, 114 provided in each of the two additional wires 101, 111 in the present embodiment, the configuration of the two concave portions 104, 114 is not limited to this. One additional wire may be bent and a concave portion may be provided at each of the opposite portions.
As described above, in the rotating electric machine 1 according to embodiment 8, since the stator coil 8 is formed with the recessed portions 104 and 114, respectively, which are recessed so as to widen the interval, at the portions facing each other of the two linear additional wires 101 and 111 facing each other with the interval therebetween, and the temperature sensor 11 is disposed between the two recessed portions 104 and 114, the heat receiving area of the temperature sensor 11 can be increased, and therefore the temperature sensor 11 can measure the temperature of the stator coil 8 more accurately. Since the temperature sensor 11 can measure the temperature of the stator coil 8 more accurately, the reliability of the temperature sensor 11 can be improved. By improving the reliability of the temperature sensor 11, the occurrence of damage to the stator coil 8 or to components provided around the stator coil 8 is further suppressed, and therefore, the reliability of the rotating electric machine 1 can be further improved.
In addition, although the present application describes various exemplary embodiments and examples, various features, modes, and functions described in one or more embodiments are not limited to the application to specific embodiments, and can be applied to the embodiments alone or in various combinations.
Therefore, numerous modifications not illustrated are contemplated within the technical scope disclosed in the present specification. For example, the case where at least one component is modified, added, or omitted is included, and the case where at least one component is extracted and combined with the components of the other embodiments is also included.
Claims (9)
1. A rotating electrical machine, characterized by comprising:
a rotor having an excitation core around which an excitation winding is wound and rotating integrally with a rotating shaft;
a stator having a cylindrical stator core disposed radially outward of the excitation core portion and a stator coil disposed in a slot formed in the stator core;
a temperature sensor that detects a temperature of the stator coil; and
a mounting member that mounts the temperature sensor to the stator coil,
a part of a coil conductor of the stator coil extending linearly is recessed in a direction orthogonal to an extending direction of the coil conductor and has a recess on a surface of the coil conductor,
the sensor portion of the temperature sensor is disposed on the side of the coil conductor where the recess is provided,
the mounting member has a sensor portion of the temperature sensor built therein and has a protruding portion that abuts against the recessed portion.
2. The rotating electric machine according to claim 1,
the mounting member is mounted to the coil conductor so as to cover a part or all of a portion of the coil conductor where the recess is formed.
3. The rotating electric machine according to claim 1 or 2,
the sensor portion of the temperature sensor is disposed at a position facing the bottom of the recess.
4. The rotating electric machine according to any one of claims 1 to 3,
the mounting member includes:
a sensor holding portion having the protruding portion abutting against the recessed portion and incorporating a sensor portion of the temperature sensor; and
a fixing member that is made of an insulating material and fixes the sensor holding portion to the coil conductor so as to integrally surround the sensor holding portion and a portion of the coil conductor where the recess is formed.
5. The rotating electric machine according to any one of claims 1 to 3,
the mounting member includes:
a sensor holding portion in which a sensor portion of the temperature sensor is built; and
a fixing member that is made of an insulating material, fixes the sensor holding portion to the coil conductor so as to integrally surround the portion of the coil conductor where the recess is formed and the sensor holding portion, and has the protruding portion that abuts against the recess.
6. The rotating electric machine according to any one of claims 1 to 5,
the recess is formed on the surface of the coil conductor by bending a portion of the linearly extending coil conductor in a direction orthogonal to the extending direction of the coil conductor.
7. The rotating electric machine according to any one of claims 1 to 5,
the recess is formed on the surface of the coil conductor by making a sectional area of a part of the coil conductor smaller than sectional areas of the coil conductor before and after the part of the coil conductor, so that the recess is recessed in a direction orthogonal to an extending direction of the coil conductor.
8. The rotating electric machine according to any one of claims 1 to 7,
the coil conductor includes: a conductor part; and an insulating coating film provided so as to surround the conductor portion,
the insulating coating is removed from the coil conductor at a portion of the coil conductor where the recess is formed.
9. The rotating electric machine according to any one of claims 1 to 8,
the stator coil is formed with the recessed portions recessed so as to widen the interval at portions facing each other of two linear coil conductors facing each other with the interval therebetween,
the temperature sensor is arranged between the two concave parts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-177087 | 2020-10-22 | ||
| JP2020177087A JP7062042B1 (en) | 2020-10-22 | 2020-10-22 | Rotating electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114389409A true CN114389409A (en) | 2022-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111186628.1A Pending CN114389409A (en) | 2020-10-22 | 2021-10-12 | Rotating electrical machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7062042B1 (en) |
| CN (1) | CN114389409A (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008022679A (en) * | 2006-07-14 | 2008-01-31 | Toyota Motor Corp | Structure of fixing temperature detection device, and method of manufacturing rotary electric machine |
| JP2011223673A (en) * | 2010-04-06 | 2011-11-04 | Toyota Motor Corp | Rotary electric machine |
| JP5614881B2 (en) * | 2010-08-19 | 2014-10-29 | 三菱日立パワーシステムズ株式会社 | Electrical equipment |
| JP2013219913A (en) * | 2012-04-09 | 2013-10-24 | Toyota Motor Corp | Rotary electric machine |
| JP2015149863A (en) * | 2014-02-07 | 2015-08-20 | トヨタ自動車株式会社 | Stator of rotary electric machine |
| DE102016213790A1 (en) * | 2016-07-27 | 2018-02-01 | Volkswagen Aktiengesellschaft | Electric motor and method for producing a stator for the electric motor |
| DE102017217355A1 (en) * | 2017-09-28 | 2019-03-28 | Robert Bosch Gmbh | Stator of an electric machine |
| JP2019110676A (en) * | 2017-12-18 | 2019-07-04 | トヨタ自動車株式会社 | Stator of rotary electric machine |
-
2020
- 2020-10-22 JP JP2020177087A patent/JP7062042B1/en active Active
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- 2021-10-12 CN CN202111186628.1A patent/CN114389409A/en active Pending
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| Publication number | Publication date |
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| JP2022070284A (en) | 2022-05-13 |
| JP7062042B1 (en) | 2022-05-02 |
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