CN118020238A - Thermistor support and stator structure - Google Patents
Thermistor support and stator structure Download PDFInfo
- Publication number
- CN118020238A CN118020238A CN202180102842.6A CN202180102842A CN118020238A CN 118020238 A CN118020238 A CN 118020238A CN 202180102842 A CN202180102842 A CN 202180102842A CN 118020238 A CN118020238 A CN 118020238A
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- China
- Prior art keywords
- stator
- thermistor
- support
- cores
- holding portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Classifications
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
A thermistor support (18), comprising: an iron core holding part (38) which extends across two or more divided iron cores (20) of the stator (14) and holds the two or more divided iron cores (20); and a thermistor holding section (40) which extends from the core holding section (38) in the Circumferential Direction (CD) of the stator, has a tip end section for holding the thermistor (16), and applies a force to the held thermistor (16) inward in the Radial Direction (RD) of the stator (14).
Description
Technical Field
The present invention relates to a metal component (thermistor support thermi stor stay) for mounting a thermistor to a stator of an electric motor and a stator structure (stator structure) including the thermistor support.
Background
Japanese patent laying-open No. 2013-51806 describes a rotary electric machine having a mechanism for holding a thermistor. The mechanism includes a bracket. The bracket is fixed to the stator through the housing.
Disclosure of Invention
There is a split stator. The stator has a plurality of split cores. The plurality of split cores are arranged in a ring shape to form a stator. The plurality of split cores are bolted to the housing of the motor via annular holding members (stator rings).
Here, when the thermistor is mounted on the split stator, the stator ring and the holding mechanism for the thermistor are separately provided. Therefore, there is a problem in that the number of parts required in the motor having the split stator is large.
The present invention aims to solve the above technical problems.
A1 st aspect of the present invention is a thermistor support for mounting a thermistor to an annular stator that can be divided into a plurality of divided cores, the thermistor support including: an iron core holding part extending across two or more of the split iron cores and holding the two or more split iron cores; and a thermistor holding portion extending from the core holding portion in a circumferential direction of the stator, having a tip end portion for holding the thermistor, and biasing the held thermistor inward in a radial direction of the stator.
A2 nd aspect of the present invention is a stator structure including the thermistor support according to the 1 st aspect and an annular stator that can be divided into a plurality of divided cores.
According to the aspect of the present invention, the thermistor support holds not only the thermistor but also the plurality of divided cores of the stator, so that the number of parts of the motor can be reduced.
Drawings
Fig. 1 is a perspective view showing a stator structure according to an embodiment.
Fig. 2 is an axial top view of the stator structure of fig. 1.
Fig. 3 is a perspective view showing the thermistor support of fig. 1.
Fig. 4 is an axial plan view of a stator structure according to modification 2.
Detailed Description
Embodiment(s)
Fig. 1 is a perspective view showing a stator structure 10 according to an embodiment. Fig. 2 is an axial top view of the stator structure 10 of fig. 1.
The stator structure 10 has a stator 14, a thermistor 16, a thermistor support 18 and an auxiliary support 19.
The stator 14 is an annular member surrounding the shaft 12 of the motor. The stator 14 has a plurality of split cores 20, a plurality of coils 22, and a plurality of wall portions 24.
The plurality of split cores 20 are arranged in a ring shape. Accordingly, the stator 14 is formed in an annular shape as a whole. In this case, in the finished motor, a plurality of split cores 20 surround the shaft 12. The number of split cores 20 illustrated in fig. 1 and 2 is 12. The number of split cores 20 is not limited to 12.
Each of the plurality of split cores 20 has a split end face (split end) 201 in the axial direction AD of the shaft 12. The plurality of split cores 20 are annularly arranged, and thus the plurality of split end portions 201 form end portions of the stator 14 as a whole in the axial direction AD of the shaft 12.
For the plurality of coils 22, at least one coil 22 is formed on one split core 20. The plurality of coils 22 each have a coil end 221. The coil end 221 protrudes from the divided end 201 in the axial direction AD of the shaft 12 in the coil 22.
The plurality of wall portions 24 are insulating members protruding from the plurality of split cores 20 along the axial direction AD of the shaft 12. Each of the plurality of wall portions 24 is, for example, a portion of an insulator that holds the coil 22 in the split core 20. The wall 24 is disposed outside the plurality of coil ends 221 in the radial direction RD of the stator 14.
The plurality of divided cores 20 are arranged in a ring shape, and the plurality of wall portions 24 are arranged in a ring shape. Thus, the plurality of wall portions 24 enclose the plurality of coil ends 221 over the entire circumferential direction CD of the stator 14. Accordingly, the wall portion 24 protects the plurality of coil ends 221.
Further, an insulating inner wall portion 26 may be provided at a position inside the coil end 221 in the radial direction RD of the stator 14 (see fig. 1).
The plurality of wall portions 24 have a gap 28 and a thick wall portion 30, respectively. In one wall portion 24, the gap 28 and the thick wall portion 30 are aligned along the circumferential direction CD of the stator 14.
The gap 28 is a gap that communicates between a position outside the stator 14 with respect to the wall 24 and a position inside the stator 14 with respect to the wall 24 in the radial direction RD of the stator 14. The advantages of providing the wall 24 with the gap 28 will be described later.
The thick portion 30 is a portion thicker than other portions of the wall portion 24 in the radial direction RD of the stator 14. Accordingly, the rigidity of the wall portion 24 is improved. The thick portions 30 of the present embodiment are provided with a pair in the circumferential direction CD of the stator 14 with the gap 28 therebetween.
The thermistor 16 has a detection portion 32, a cable 34, and a connector 36. The detection unit 32 is a contact sensor that outputs a detection signal corresponding to the temperature of the coil 22 that is in contact. The cable 34 transmits the detection signal output from the detection unit 32 to the connector 36. The connector 36 connects the detection section 32 and an external device. Accordingly, the detection signal is input to the external device. Illustration of the external device is omitted.
Fig. 3 is a perspective view showing the thermistor support 18 of fig. 1.
The thermistor support 18 has a core holding portion 38, a thermistor holding portion 40, and a clamping portion 42.
The core holding portion 38 is a member provided across two or more divided end portions 201 continuous in the circumferential direction CD of the stator 14. For illustration, the core holder 38 is provided across five divided end portions 201 (refer to fig. 1).
The core holding portion 38 has a substantially arc shape along the ring shape of the stator 14. The core holding portion 38 is provided outside the wall portion 24 in the radial direction RD of the stator 14.
The core holding portion 38 has a1 st end 381 and a 2 nd end 382 in the radial direction RD of the stator 14. The 1 st end 381 is an end portion of the core holding portion 38 outside in the radial direction RD of the stator 14. The 2 nd end 382 is an end of the core holder 38 that is located inward in the radial direction RD of the stator 14.
The core holder 38 has a plurality of connection portions 44. The plurality of connection portions 44 have bolt holes 441, respectively. The connection portion 44 may be wider than other portions of the core holding portion 38 in the radial direction RD of the stator 14 to form the bolt hole 441.
Bolts 45 connecting the core holding portion 38 and the split cores 20 are inserted into the bolt holes 441. In association with this, the plurality of split cores 20 appropriately have a plurality of bolt holes communicating with the bolt holes 441 of the plurality of connecting portions 44.
The core holding portion 38 holds the plurality of split cores 20 by bolts 45. The core holding portion 38 is interposed between the seat portion 451 of the bolt 45 and the stator 14. Accordingly, the seat 451 of the bolt 45 is prevented from exerting a local pressure on the stator 14.
The bolts 45 may connect the motor case and the plurality of split cores 20. In this case, for example, bolts 45 are inserted through the housing, the connecting portion 44, and the split cores 20 in this order. Since the housing of the motor is a known component, the description thereof will not be given in the present embodiment.
The thermistor holding portion 40 is a leaf spring-like elastic member extending from the core holding portion 38 in the circumferential direction CD of the stator 14. The detection unit 32 (see fig. 1) is attached to the distal end portion of the thermistor retaining unit 40. The thermistor retaining portion 40 biases the retained detecting portion 32 inward in the radial direction RD of the stator 14.
Here, the wall portion 24 is interposed between the coil end 221 and the core holding portion 38 along the circumferential direction CD of the stator 14. However, the wall 24 has the gap 28 described above. Accordingly, the thermistor retaining portion 40 can bring the detecting portion 32 into contact with the coil end 221 via the gap 28. That is, the thermistor retaining portion 40 does not need to bypass the wall portion 24 in the axial direction AD of the shaft 12. Therefore, the thermistor retaining portion 40 can take a simple shape.
The thermistor retaining portion 40 preferably extends from the 1 st end 381 out of the 1 st end 381 and the 2 nd end 382 (see fig. 3). Accordingly, the extension length of the thermistor holding portion (plate spring) 40 is longer than that of the case of extending from the 2 nd end 382. As a result, the load variation in which the detection unit 32 is pressed against the coil end 221 can be suppressed.
The thermistor holding portion 40 preferably extends from a particularly connecting portion 44 of the core holding portion 38 (see fig. 2). The reason for this is as follows. The elastic force of the thermistor holding portion 40 acts against the core holding portion 38. As a result, the core holding portion 38 may be deformed. Here, the connection portion 44 is firmly fixed by a bolt 45. Therefore, the thermistor retaining portion 40 extends from the connection portion 44, whereby the influence of the reaction can be suppressed.
The clamp 42 is a fixture that holds the cable 34. The number of the holding portions 42 is not particularly limited. For example, the thermistor support 18 of the present embodiment has a plurality of holding portions 42. The plurality of clamping portions 42 are arranged along the circumferential direction CD of the stator 14.
The cable 34 is held by the clamp 42, and the cable 34 is prevented from being scattered around the periphery of the stator 14.
The thermistor support 18 holds not only the thermistor 16 but also a plurality of divided cores 20. Therefore, there is no need to mount the stator ring to the stator 14. As a result, the number of components of the motor having the stator 14 can be reduced. In addition, the stator structure 10 becomes simple. The shape of the thermistor retaining portion 40 is not limited to a plate spring shape as long as the retained detecting portion 32 can be biased toward the inside (coil end 221) in the radial direction RD of the stator 14.
The auxiliary support 19 has a substantially arc shape along the ring shape of the stator 14 (see fig. 2). The auxiliary support 19 is provided at an end of the stator 14 in the axial direction AD of the shaft 12. However, the auxiliary support 19 is provided to two or more split cores 20 (split end 201) of the plurality of split cores 20 where the thermistor support 18 is not provided.
A plurality of bolt holes 191 are formed in the auxiliary support 19. Therefore, the auxiliary support 19 can be connected to the plurality of split cores 20 by the bolts 45. Accordingly, the auxiliary support 19 holds the plurality of split cores 20 connected to itself. As a result, the rigidity of the entire stator 14 is further improved. Further, the number of bolt holes 191 of the auxiliary support 19 may be different from the number of bolt holes 441 of the thermistor support 18. The auxiliary support 19 may be omitted as needed.
The auxiliary support 19 may have one or more clamping portions (42) capable of holding the cable 34, similarly to the thermistor support 18.
The auxiliary support 19 has a shape equivalent to that of the thermistor support 18 in which at least the thermistor holding portion 40 of the thermistor holding portion 40 and the holding portion 42 are omitted. In this case, for example, the apparatus for manufacturing the core holder 38 can be used for manufacturing the auxiliary support 19. The number of divided cores 20 held by the auxiliary support 19 may be different from the number of divided cores 20 held by the thermistor support 18. In addition, the material of the thermistor support 18 and the material of the auxiliary support 19 may also be different from each other. For example, the auxiliary support 19 may also comprise a less expensive material than the thermistor support 18. Accordingly, the manufacturing cost of the auxiliary support 19 can be suppressed to be lower than the manufacturing cost of the thermistor support 18. In addition, the auxiliary support 19 may also comprise a material having a lower spring characteristic than the thermistor support 18. For example, the auxiliary support 19 may also comprise a material having a higher rigidity than the thermistor support 18.
Modification example
The following describes modifications of the above embodiment. However, in the following description, the description repeated with the above embodiments is omitted as much as possible. Unless otherwise specified, the same reference numerals as those of the above embodiments are given to the constituent elements described in the above examples.
Modification 1
The shape of the core holding portion 38 is not limited to an arc shape. For example, the core holding portion 38 may have an annular shape concentric with the stator 14. In this case, the auxiliary support 19 is not required.
Modification 2
Fig. 4 is an axial plan view of the stator structure 10 according to modification 2.
The stator structure 10 may also include a plurality of thermistor supports 18 as desired.
For example, in the case where the motor is a multiphase motor, the plurality of coils 22 have at least the 1 st coil 46 and the 2 nd coil 48 whose voltage phases are different from each other. In this case, a plurality of arc-shaped thermistor holders 18 may be provided corresponding to at least the 1 st coil 46 and the 2 nd coil 48. Accordingly, the thermistors 16 can be mounted separately on the 1 st coil 46 and the 2 nd coil 48.
Preferably, the plurality of thermistor supports 18 are uniform in shape. For example, the shape of the thermistor support 18 corresponding to the 1 st coil 46 and the shape of the thermistor support 18 corresponding to the 2 nd coil 48 are preferably identical to each other.
Accordingly, a plurality of thermistor supports 18 can be produced by the same production line. Therefore, the production equipment of the thermistor support 18 becomes simple.
Modification 3
The method of connecting the thermistor support 18 and the stator 14 is not limited to bolting. For example, the plurality of connection portions 44 may be respectively riveted to the stator 14 via a caulking member. The plurality of connection portions 44 may be bonded to the stator 14 with an adhesive. Here, the shape of each of the plurality of connection portions 44 may be changed as needed, for example, in order to achieve the above-described caulking or bonding. The method of connecting the auxiliary support 19 to the stator 14 is not limited to the bolt fastening, as is the method of connecting the thermistor support 18 to the stator 14.
The present invention is not limited to the above-described embodiments and modifications, and various configurations may be adopted without departing from the gist of the present invention.
[ Invention obtained from the embodiment ]
The following describes the invention that can be obtained from the above-described embodiments and modifications.
< 1 St invention >
A thermistor support (18) for mounting a thermistor (16) to an annular stator (14) that can be divided into a plurality of divided cores (20), the thermistor support (18) comprising: an iron core holding unit (38) that extends across two or more of the split iron cores (20) and holds the two or more split iron cores (20); and a thermistor holding portion (40) extending from the core holding portion (38) in the Circumferential Direction (CD) of the stator (14), having a tip end portion holding the thermistor (16), and urging the held thermistor (16) inward in the Radial Direction (RD) of the stator (14).
Accordingly, the thermistor support holds not only the thermistor but also the plurality of divided cores of the stator, and therefore the number of parts of the motor can be reduced.
The core holding portion (38) may have a connection portion (44) connected to the stator (14), and the thermistor holding portion (40) may extend from the connection portion (44) in a Circumferential Direction (CD) of the stator (14). Accordingly, the possibility of deformation of the core holding portion due to the reaction of the urging force of the thermistor holding portion is reduced.
The thermistor holding portion (40) may have a plate spring shape and extend from an end portion (381) of the core holding portion (38) that is located outside in the Radial Direction (RD) of the stator (14). Therefore, the variation in the load pressing the thermistor against the coil end can be suppressed.
The thermistor support (18) may also have a clamping portion (42) capable of holding the cable (34). Accordingly, the cables are prevented from being scattered.
< 2 Nd invention >
A stator structure (10) has the thermistor support (18) and an annular stator (14), the annular stator (14) being divisible into a plurality of divided cores (20).
Accordingly, the number of parts of the motor having the split stator can be reduced. In addition, the structure of the motor having the split stator becomes simple.
The plurality of split cores (20) may have coil ends (221), the coil ends (221) may extend in A Direction (AD) orthogonal to a Circumferential Direction (CD) and a Radial Direction (RD) of the stator (14), and the core holding portion (38) may be provided at a position outside the coil ends (221) in the Radial Direction (RD) of the stator (14). Accordingly, the extension length of the thermistor holding portion in the circumferential direction of the stator can be increased as compared with the case of being disposed inside the stator. As a result, the load variation of pressing the thermistor against the coil end can be suppressed.
The plurality of split cores (20) may each have an insulating wall portion (24), the wall portion (24) being interposed between the coil end (221) and the core holding portion (38) along the Circumferential Direction (CD) of the stator (14), and the wall portion (24) may have a gap (28), the gap (28) allowing the thermistor (16) to contact the coil end (221) along the Radial Direction (RD) of the stator (14). Accordingly, the thermistor retaining portion can be prevented from bypassing the wall portion in the axial direction of the shaft.
A plurality of the thermistor supports (18) may be provided along a Circumferential Direction (CD) of the stator (14). Accordingly, the thermistors separated from each other can be mounted to the plurality of coils.
The shape of a plurality of the thermistor supports (18) may be identical to each other. Accordingly, the production equipment of the thermistor support becomes simple.
The stator structure (10) may further have an auxiliary support (19), and the auxiliary support (19) may extend across two or more of the split cores (20) that are not held by the thermistor support (18) among the plurality of split cores (20) and hold the two or more split cores (20). Accordingly, the rigidity of the entire stator can be improved as needed.
Description of the reference numerals
10: A stator structure; 12: a shaft; 14: a stator; 16: a thermistor; 18: a thermistor support; 19: an auxiliary support; 20: dividing the iron core; 24: a wall portion; 28: a gap; 34: a cable; 38: a core holding portion; 40: a thermistor holding portion; 42: a clamping part; 44: a connection part; 45: a bolt; 221: a coil end; 381: 1 st end (outer end); 441: bolt holes.
Claims (10)
1. A thermistor support (18) for mounting a thermistor (16) to an annular stator (14) which can be divided into a plurality of divided cores (20), characterized in that,
Comprising the following steps:
An iron core holding unit (38) that extends across two or more of the split iron cores (20) and holds the two or more split iron cores (20); and
And a thermistor holding portion (40) extending from the core holding portion (38) in the Circumferential Direction (CD) of the stator (14), having a tip end portion for holding the thermistor (16), and applying a force to the held thermistor (16) inward in the Radial Direction (RD) of the stator (14).
2. The thermistor support (18) according to claim 1, characterized in that,
The core holding part (38) has a connecting part (44) connected with the stator (14),
The thermistor holding portion (40) extends from the connecting portion (44) in a Circumferential Direction (CD) of the stator (14).
3. Thermistor support (18) according to claim 1 or 2, characterized in that,
The thermistor holding part (40) has a leaf spring shape, and extends from an end part (381) of the core holding part (38) that is located outside in the Radial Direction (RD) of the stator (14).
4. A thermistor support (18) according to claim 1 to 3,
Also provided is a clamping portion (42), the clamping portion (42) being capable of holding the cable (34).
5. A stator structure (10) is characterized in that,
A stator (14) having the thermistor support (18) according to any one of claims 1 to 4 and an annular stator (20) which can be divided into a plurality of divided cores.
6. The stator structure (10) according to claim 5, characterized in that,
The plurality of split cores (20) each have a coil end (221), the coil ends (221) extending in A Direction (AD) orthogonal to the Circumferential Direction (CD) and the Radial Direction (RD) of the stator (14),
The core holding portion (38) is provided on the outer side of the coil end (221) in the Radial Direction (RD) of the stator (14).
7. The stator structure (10) according to claim 6, characterized in that,
The plurality of split cores (20) each have an insulating wall portion (24), the wall portion (24) being interposed between the coil end (221) and the core holding portion (38) along the Circumferential Direction (CD) of the stator (14),
The wall portion (24) has a gap (28), which gap (28) allows the thermistor (16) to be in contact with the coil end (221) in a Radial Direction (RD) of the stator (14).
8. The stator structure (10) according to any one of claims 5 to 7, characterized in that,
A plurality of the thermistor supports (18) are provided along a Circumferential Direction (CD) of the stator (14).
9. The stator structure (10) according to claim 8, characterized in that,
The plurality of thermistor supports (18) are identical in shape to each other.
10. The stator structure (10) according to any one of claims 5 to 9, characterized in that,
The thermistor assembly further comprises an auxiliary support (19), wherein the auxiliary support (19) extends across two or more divided cores (20) which are not held by the thermistor support (18) among the plurality of divided cores (20) and holds the two or more divided cores (20).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2021/036141 WO2023053344A1 (en) | 2021-09-30 | 2021-09-30 | Thermistor stay and stator structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118020238A true CN118020238A (en) | 2024-05-10 |
Family
ID=85781616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180102842.6A Pending CN118020238A (en) | 2021-09-30 | 2021-09-30 | Thermistor support and stator structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2023053344A1 (en) |
| CN (1) | CN118020238A (en) |
| WO (1) | WO2023053344A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5605171B2 (en) * | 2010-11-04 | 2014-10-15 | アイシン精機株式会社 | ELECTRIC MOTOR AND VEHICLE DRIVE DEVICE USING THE ELECTRIC MOTOR |
| JP5957184B2 (en) * | 2011-04-01 | 2016-07-27 | 本田技研工業株式会社 | Vehicle drive device |
| JP5996917B2 (en) * | 2012-04-20 | 2016-09-21 | トヨタ自動車株式会社 | Stator for rotating electrical machine and method for manufacturing the stator for rotating electrical machine |
| EP3306291B1 (en) * | 2015-05-25 | 2020-07-08 | Nissan Motor Co., Ltd. | Temperature sensor mounting structure |
| JP2022548532A (en) * | 2019-09-23 | 2022-11-21 | カヌー テクノロジーズ インク | Fractional slot electric motor with coil elements with rectangular cross section |
-
2021
- 2021-09-30 CN CN202180102842.6A patent/CN118020238A/en active Pending
- 2021-09-30 WO PCT/JP2021/036141 patent/WO2023053344A1/en active Application Filing
- 2021-09-30 JP JP2023550910A patent/JPWO2023053344A1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023053344A1 (en) | 2023-04-06 |
| JPWO2023053344A1 (en) | 2023-04-06 |
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