Stator structure

Abstract

To provide a stator structure capable of fixing a temperature sensor to a coil of a rotary electric machine in a stable state.SOLUTION: A stator structure includes: a stator core 110 having a plurality of salient pole parts; a plurality of coils 120 wound around the plurality of salient pole parts; a temperature sensor 160 for detecting a temperature between the adjacent coils 120; and a holder 140 which is inserted between the adjacent coils 120 and holds the temperature sensor 160 between the adjacent coils 120 by a position fixing agent 150. The holder 140 includes a storage part 141 for forming a storage area 142 storing the position fixing agent 150; and a supporting part 143 for forming a flow path 145 which guides the position fixing agent 150 to the storage area 142.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a stator structure, and more particularly to a stator structure used in a rotating electrical machine.

Background Art

[0002] In rotating electrical machines such as motors and generators, there is a stator in which a stator coil (hereinafter referred to as "coil") is wound around a salient pole portion. In this type of stator, it is necessary to measure the temperature of the coil in order to achieve stable operation.

[0003] Conventionally, a temperature sensor such as a thermocouple has been arranged on the surface of the coil or between adjacent coils to measure the temperature of the coil. At this time, the temperature sensor has been fixed to the coil or the stator using an adhesive. A technique for detecting the temperature of a coil using a temperature sensor in a rotating electrical machine is described in Patent Document 1.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Patent Document 1 discloses a technique of using an adhesive to adhere and fix a temperature sensor near the surface of a coil. On the other hand, the adhesive has a tendency to drip downward according to gravity and is difficult to stay near the temperature sensor. For this reason, it has been difficult to stably fix the temperature sensor. As a result, the temperature sensor does not exist at a desired position, and a problem that accurate temperature measurement cannot be performed has occurred. There is also a problem that other parts are contaminated by the dripping adhesive.

[0006] The present invention has been made to solve the above problems, and an object thereof is to provide a stator structure capable of stably fixing a temperature sensor to a coil of a rotating electrical machine.

Means for Solving the Problems

[0007] The stator structure according to this invention includes a stator core having a plurality of protruding pole portions, a plurality of coils wound around the plurality of protruding pole portions, a temperature sensor that detects temperature between adjacent coils, and a holder that is inserted between adjacent coils and holds the temperature sensor between the adjacent coils by a positioning agent. The holder has a storage portion that forms a storage region for storing the positioning agent and a support portion that forms a flow path for guiding the positioning agent to the storage region.

[0008] In the stator structure according to this invention, the temperature sensor may include a temperature sensing portion that is fixed in position by the positioning agent accumulated in the storage region and detects temperature, and a signal line that outputs an detection signal generated by the temperature detection in the temperature sensing portion to the outside.

[0009] In the stator structure according to this invention, the support portion may be configured to extend along the signal line of the temperature sensor.

[0010] In the stator structure according to this invention, the storage portion and the support portion may be configured in a plate shape.

[0011] In the stator structure according to this invention, the support portion may be composed of a pair of columnar portions that are separated from each other in the radial direction of adjacent coils and face each other, and the columnar portion located on the outer side in the radial direction and the columnar portion located on the inner side may have different thicknesses in the interval direction of adjacent coils.

[0012] In the stator structure according to this invention, in a state where the storage region is arranged so as to be located in a region to be temperature-measured, the support portion may be configured such that an end portion protrudes from an adjacent coil.

[0013] In the stator structure according to the present invention, when the direction parallel to the central axis direction of the coil is the X direction, the longitudinal direction of the support portion is the Z direction, and the direction of the interval between adjacent coils is the Y direction, the storage portion may be configured to prevent leakage of the positioning agent in the X direction and the Z direction.

[0014] In the stator structure according to the present invention, when the direction of the interval between adjacent coils is the Y direction, the storage portion may be provided with a leakage prevention portion for preventing leakage of the positioning agent in the Y direction at the Y-direction end of the storage region.

[0015] In the stator structure according to the present invention, when the direction parallel to the central axis direction of the coil is the X direction, the X-direction interval of the flow path is XD1, and the maximum value of the X-direction spread of the storage region is XD2, a configuration satisfying the relationship XD2>XD1 may be adopted.

[0016] In the stator structure according to the present invention, the storage portion may have a surface processing portion processed to increase the surface area on the surface forming the storage region.

Effect of the Invention

[0017] In the stator structure according to the present invention, a stator core having a plurality of protruding magnetic pole portions, a plurality of coils wound around the plurality of protruding magnetic pole portions, a temperature sensor for detecting the temperature between adjacent coils, and a holder inserted between adjacent coils and holding the temperature sensor between adjacent coils by a positioning agent are provided. Since the holder includes a storage portion for forming a storage region for storing the positioning agent and a support portion for forming a flow path for guiding the positioning agent to the storage region, it is possible to provide a stator structure capable of fixing the temperature sensor to the coil of the rotating electrical machine in a stable state.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the stator structure of the present invention (hereinafter referred to as "the structure of stator 100") will be described with reference to the drawings. In each figure, the same parts are denoted by the same reference numerals.

[0020] Embodiment 1. First, the structure of stator 100 in Embodiment 1 will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view showing the structure of the stator 100 according to Embodiment 1. FIG. 2 is a perspective view showing the configuration of the holder 140 that holds the temperature sensor 160 in the structure of the stator 100 according to Embodiment 1. FIGS. 3 and 4 are perspective views showing another example of the configuration of the holder 140 that holds the temperature sensor 160 in the structure of the stator 100 according to Embodiment 1. FIG. 5 is a perspective view showing the configuration of the holder 140 in the structure of the stator 100 according to Embodiment 1 together with the temperature sensor 160.

[0021] [Structure of Stator 100] The stator 100 mainly includes a stator core 110, a coil 120, an insulating portion 130, a holder 140, and a temperature sensor 160. A rotor (not shown) is disposed inside the stator 100. The stator core 110 includes an annular magnetic path portion and a plurality of protruding magnetic pole portions that protrude inward from the annular magnetic path portion at predetermined angular intervals, and is formed of a magnetic material such as an electromagnetic steel sheet. The coil 120 is wound around each of the plurality of protruding magnetic pole portions of the stator core 110. The insulating portion 130 is formed of an insulating material in order to ensure insulation at the ends of the coil 120. The holder 140 is inserted between adjacent coils 120 and holds the temperature sensor 160 between the adjacent coils 120 by a positioning agent 150 (see FIG. 6). The temperature sensor 160 is held by the holder 140 and detects the temperature of the coil 120 between adjacent coils 120.

[0022] [Structure of Holder 140] As shown in FIG. 2, the holder 140 includes a storage portion 141, a storage region 142, a support portion 143, an introduction portion 144, and a flow path 145. The storage portion 141 forms a concave storage region 142 for storing the positioning agent 150 in the gap between adjacent coils 120. The storage portion 141 is configured in a shape having a concave portion such as a U shape (see the storage portion 141 in FIG. 2) or a V shape (see the storage portion 141 in FIG. 3). Further, the storage portion 141 may be configured in a shape having various concave portions not shown here.

[0023] The support portion 143 has one end open and a storage portion 141 connected to the other end. The support portion 143 forms a flow path 145 that guides the position fixing agent 150 to the storage region 142. The storage portion 141 and the support portion 143 are configured in a plate shape so that they can be easily inserted into the gap between adjacent coils 120. The support portion 143 is configured to extend along the signal line 162 of the temperature sensor 160.

[0024] The support portion 143 is composed of a pair of columnar portions 143a and 143b that are radially separated from and opposed to adjacent coils 120. The thickness d1 of the columnar portion 143a located on the outer side in the radial direction and the thickness d2 of the columnar portion 143b located on the inner side may have different thicknesses in the interval direction between adjacent coils.

[0025] The support portion 143 is configured such that its end protrudes from the adjacent coil 120 in a state where the storage region 142 is arranged to be located in the region to be temperature-measured. The support portion 143 may be composed of a pair of columnar portions 143a and 143b as shown in FIGS. 1 to 3, or may be composed of a single columnar portion 143a as shown in FIG. 4.

[0026] The introduction portion 144 is configured with an inclined surface 144a and is configured to facilitate the acceptance of the position fixing agent 150 and the temperature sensor 160 into the flow path 145.

[0027] As shown in FIG. 5, the temperature sensor 160 includes a temperature sensing portion 161 and a signal line 162. The temperature sensing portion 161 is fixed in position by a position fixing agent 150 (not shown) that accumulates in the storage region 142 and detects the temperature of the coil 120. The signal line 162 outputs an detection signal generated by the temperature detection in the temperature sensing portion 161 to the outside. As the temperature sensor 160, various temperature measurement members such as a thermocouple, a resistance temperature detector, and a thermistor can be used.

[0028] [Holding of the Temperature Sensor 160 by the Holder 140] Next, the holding of the temperature sensor 160 by the holder 140 in the gap between adjacent coils 120 will be described with reference to FIG. 6. FIG. 6 is an explanatory diagram schematically showing a state in which the holder 140 is inserted between adjacent coils 120 in the structure of the stator 100 according to the first embodiment.

[0029] Step 1: Insert only the holder 140 into the gap between adjacent coils 120 (see (a) of FIG. 6). The holder 140 is inserted such that the storage region 142 reaches near the center between the coils 120 and the end of the holder 140 protrudes from the end of the coil 120.

[0030] Step 2: Drop or inject a position fixing agent 150 such as an adhesive and a potting agent from the introduction portion 144 of the holder 140 (see (b) of FIG. 6). The dropped or injected position fixing agent 150 accumulates in the storage region 142 via the flow path 145.

[0031] Step 3: Insert the temperature sensor 160 from the introduction portion 144 such that the temperature sensing portion 161 reaches the storage region 142. At this time, the temperature sensor 160 is inserted such that the temperature sensing portion 161 is positioned in the storage region 142. The temperature sensing portion 161 is fixed in position by the position fixing agent 150 accumulated in the storage region 142 (see (c) of FIG. 6). As a result, the holder 140 can hold and fix the temperature sensor 160 in a stable state with respect to the coil 120 while preventing the dripping of the position fixing agent 150. By allowing the position fixing agent 150 to accumulate not only in the storage region 142 but also in the flow path 145, not only the temperature sensing portion 161 but also the signal line 162 is fixed.

[0032] [Effects Obtained by the First Embodiment] In the structure of the stator 100 according to Embodiment 1, there are provided a stator core 110 having a plurality of protruding pole portions, a plurality of coils 120 wound around the plurality of protruding pole portions, a temperature sensor 160 for detecting the temperature between adjacent coils 120, and a holder 140 inserted between adjacent coils 120 and holding the temperature sensor 160 between the adjacent coils 120 by a positioning agent. The holder 140 includes a storage portion 141 forming a storage region 142 for storing the positioning agent 150 and a support portion 143 forming a flow path 145 for guiding the positioning agent 150 to the storage region 142. Therefore, it is possible to stably fix the temperature sensor 160 to the coil 120 of the rotating electrical machine while preventing the dripping of the positioning agent 150. As a result, the temperature sensor 160 is stably fixed at a desired position, enabling accurate temperature measurement. Also, other parts are not soiled by the positioning agent 150.

[0033] In the structure of the stator 100 according to Embodiment 1, the temperature sensor 160 includes a temperature sensing portion 161 for detecting the temperature and a signal line 162 for outputting a detection signal to the outside. The position of the temperature sensing portion 161 is fixed by the positioning agent 150 accumulated in the storage region 142. For this reason, it is possible to surely fix the temperature sensing portion 161 of the temperature sensor 160 in a stable state with respect to the coil 120 of the rotating electrical machine.

[0034] In the structure of the stator 100 according to Embodiment 1, the support portion 143 is configured to extend along the signal line 162 of the temperature sensor 160. For this reason, the detection signal of the temperature sensor 160 can be output to the outside in a stable state. Also, since the signal line 162 is also in a stable state, it does not adversely affect the temperature sensing portion 161.

[0035] In the structure of the stator 100 according to Embodiment 1, since the storage portion 141 and the support portion 143 are configured in a plate shape, they can be easily inserted into the gap between adjacent coils 120 without damaging the coating of the coils 120.

[0036] In the structure of the stator 100 according to Embodiment 1, the support portion 143 is composed of a pair of columnar portions 143a and 143b that are opposed to each other with a radial gap between adjacent coils 120, and the thickness d1 of the columnar portion 143a located on the outer side in the radial direction and the thickness d2 of the columnar portion 143b located on the inner side may have different thicknesses in the interval direction between adjacent coils 120. Here, the thicknesses d1 and d2 may be determined according to the outer interval and the inner interval in the radial direction between adjacent coils 120. Thereby, even when the outer interval and the inner interval in the radial direction between adjacent coils 120 are not equal, the holder 140 can be made to correspond, and while preventing the drooping of the position fixing agent 150, the temperature sensor 160 can be fixed to the coil 120 in a stable state.

[0037] In the structure of the stator 100 according to Embodiment 1, the support portion 143 is configured such that the end portion protrudes from the adjacent coil 120 in a state where the storage region 142 is arranged so as to be located in the target region for temperature measurement. Therefore, the holder 140 can be inserted at an appropriate position.

[0038] In the structure of the stator 100 according to Embodiment 1, when the direction parallel to the central axis direction of the coil 120 is the X direction, the longitudinal direction of the support portion 143 is the Z direction, and the direction of the interval between adjacent coils 120 is the Y direction, the storage portion 141 prevents the leakage of the position fixing agent 150 in the X direction and the Z direction. Here, the X direction means the ±X direction, and the Z direction means the direction in which the position fixing agent 150 droops according to gravity. Thereby, the position fixing agent 150 can be surely accumulated in the storage region 142, and contamination of other parts can be prevented.

[0039] Embodiment 2. The structure of the stator 100 in Embodiment 2 will be described with reference to FIG. 7. FIG. 7 is a perspective view showing the configuration of the holder 140 that holds the temperature sensor 160 in the structure of the stator 100 according to Embodiment 2. In FIG. 7, the same components as those described in Embodiment 1 are denoted by the same reference numerals, redundant descriptions are omitted, and the description will be centered on the different parts.

[0040] [Maintain the structure of the holder 140] First, define the X, Y, and Z directions as follows. The direction parallel to the central axis direction of the coil 120 is the X direction, the longitudinal direction of the support portion 143 is the Z direction, and the direction of the interval between adjacent coils 120 is the Y direction. Note that the X direction is also the direction parallel to the central axis of the coil 120. Here, the X direction means the ±X direction, the Y direction means the ±Y direction, and the Z direction means the direction in which the position fixing agent 150 hangs according to gravity. In FIG. 7, at both ends of the storage region 142 in the Y direction, wall-shaped leakage prevention portions 170 for preventing the leakage of the position fixing agent 150 in the Y direction are provided respectively. It is desirable to use a member with high thermal conductivity for each leakage prevention portion 170 so as not to have an adverse effect on temperature measurement. Note that in the configuration of FIG. 7, it is possible to apply a combination of the deformation of the storage region 142 shown in FIG. 3 and the support portion 143 by a single columnar portion 143a shown in FIG. 4.

[0041] [Effects obtained by Embodiment 2] According to the structure of the stator 100 according to Embodiment 2, not only can the temperature sensor 160 be fixed to the coil 120 of the rotating electrical machine in a stable state, but also the position fixing agent 150 can be surely accumulated in the storage region 142, and contamination of other parts can be prevented.

[0042] Embodiment 3. The structure of the stator 100 in Embodiment 3 will be described with reference to FIG. 8. FIG. 8 is a perspective view showing the configuration of the holder 140 that holds the temperature sensor 160 in the structure of the stator 100 according to Embodiment 3. In FIG. 8, the same components as those described in Embodiments 1 and 2 are denoted by the same reference numerals, and redundant descriptions are omitted, and the description will be centered on the different parts.

[0043] [Structure of the holder 140] Define the X, Y, and Z directions in the same manner as in Embodiment 2. In FIG. 8, let the interval in the X direction of the flow path 145 be XD1, and the maximum value of the spread in the X direction of the storage region 142 be XD2. Here, a storage region 142 having a spread in the X direction larger than that of the flow path 145 is formed so as to satisfy the relationship XD2 > XD1. As a result, it becomes possible to store more position fixing agents 150 than in Embodiments 1 and 2. In addition, in the configuration of FIG. 8, it is possible to apply a combination of the deformation of the storage region 142 shown in FIG. 3, the support portion 143 by the single columnar portion 143a shown in FIG. 4, and the wall-shaped leakage prevention portion 170 for preventing leakage in the Y direction shown in FIG. 7.

[0044] [Effects Obtained by Embodiment 3] According to the structure of the stator 100 according to Embodiment 3, more position fixing agents 150 than in Embodiments 1 and 2 can be surely accumulated in the storage region 142, and the temperature sensor 160 can be fixed to the coil 120 of the rotating electrical machine in a more stable state.

[0045] Embodiment 4. The structure of the stator 100 in Embodiment 4 will be described with reference to FIG. 9. FIG. 9 is a perspective view showing the configuration of a holder 140 that holds the temperature sensor 160 in the structure of the stator 100 according to Embodiment 4. In FIG. 9, the same components as those described in Embodiments 1 and 2 are denoted by the same reference numerals, redundant descriptions are omitted, and the description will be centered on the different parts.

[0046] [Structure of Holder 140] Define the X, Y, and Z directions in the same manner as in Embodiments 2 and 3. In FIG. 9, a surface processing portion 180 that is processed to increase the surface area is provided on the surface of the storage portion 141 that forms the storage region 142. In FIG. 9, although a groove in the XZ direction is shown as the surface treatment portion 180, the present invention is not limited thereto, and various surface treatments can be adopted. As the surface treatment portion 180, sandblasting can be performed on the surface of the storage portion 141 that forms the storage region 142, various rough surface treatments can be performed, a plurality of cylindrical or barbed convex portions can be added, a plurality of hole-shaped concave portions can be added, and the like. In addition, in the configuration of FIG. 9, it is possible to apply a combination of the deformation of the storage region 142 shown in FIG. 3, the support portion 143 by the single columnar portion 143a shown in FIG. 4, the wall-shaped leakage prevention portion 170 for preventing leakage in the Y direction shown in FIG. 7, and the X-direction expansion of the storage region 142 shown in FIG. 8.

[0047] [Effects Obtained by Embodiment 4] According to the structure of the stator 100 according to Embodiment 4, the position fixing agent 150 can be fixed to the storage portion 141 more firmly than in Embodiments 1 to 3, and the temperature sensor 160 can be fixed to the coil 120 of the rotating electrical machine in a more stable state.

Explanation of Reference Numerals

[0048] 100 Stator, 110 Stator Core, 120 Coil, 130 Insulating Portion, 140 Holder, 141 Storage Portion, 142 Storage Region, 143 Support Portion, 143a, 143b Columnar Portion, 144 Introduction Portion, 144a Inclined Surface, 145 Flow Path, 150 Position Fixing Agent, 160 Temperature Sensor, 161 Temperature Sensing Portion, 162 Signal Line, 170 Leakage Prevention Portion, 180 Surface Treatment Portion, XD1 X-direction Interval of Flow Path, XD2 Maximum Value of X-direction Spread of Storage Region.

Claims

1. A stator core (110) having a plurality of protruding magnetic pole portions, A plurality of coils (120) wound around the plurality of protruding magnetic pole portions, A temperature sensor (160) for detecting temperature between adjacent coils (120), A holder (140) inserted between the adjacent coils (120) and holding the temperature sensor (160) between the adjacent coils (120) by a position fixing agent (150), comprising The holder (140) has a storage portion (141) forming a storage region (142) for storing the position fixing agent (150), and a support portion (143) forming a flow path (145) for guiding the position fixing agent (150) to the storage region (142), A stator structure.

2. The temperature sensor (160) includes a temperature sensing portion (161) that is fixed in position by the position fixing agent (150) accumulated in the storage region (142) and detects temperature, and a signal line (162) that outputs an detection signal generated by temperature detection in the temperature sensing portion (161) to the outside, The stator structure according to claim 1.

3. The support portion (143) is configured to be along the signal line (162), The stator structure according to claim 2.

4. The storage portion (141) and the support portion (143) are configured in a plate shape, The stator structure according to claim 1.

5. The support portion (143) is composed of a pair of columnar portions (143a, 143b) that are separated from each other in the radial direction of the adjacent coils (120) and face each other, The thickness (d1) of the columnar portion (143a) located on the outer side in the radial direction and the thickness (d2) of the columnar portion (143b) located on the inner side are different in the thickness in the interval direction of the adjacent coils (120), The stator structure according to claim 4.

6. In a state where the storage region (142) is arranged to be located in a region to be temperature-measured, the support portion (143) is configured such that an end portion thereof protrudes from the adjacent coil (120). The stator structure according to claim 1.

7. When a direction parallel to the central axis direction of the coil (120) is defined as the X direction, the longitudinal direction of the support portion (143) is defined as the Z direction, and the direction of the interval between the adjacent coils (120) is defined as the Y direction, the storage portion (141) prevents leakage of the position fixing agent (150) in the X direction and the Z direction. The stator structure according to any one of claims 1 to 6.

8. In the storage portion (141), a leakage prevention portion (170) for preventing leakage of the position fixing agent (150) in the Y direction is provided at an end portion in the Y direction of the storage region (142). The stator structure according to claim 7.

9. When a direction parallel to the central axis direction of the coil (120) is defined as the X direction, the interval in the X direction of the flow path (145) is defined as XD1, and the maximum value of the spread in the X direction of the storage region (142) is defined as XD2, the relationship XD2 > XD1 is satisfied. The stator structure according to claim 1.

10. The storage portion (141) has a surface processing portion that is processed to increase the surface area on the surface forming the storage region (142). The stator structure according to claim 1.

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