WO2023072664A1 - Stator einer elektrischen maschine - Google Patents
Stator einer elektrischen maschine Download PDFInfo
- Publication number
- WO2023072664A1 WO2023072664A1 PCT/EP2022/078852 EP2022078852W WO2023072664A1 WO 2023072664 A1 WO2023072664 A1 WO 2023072664A1 EP 2022078852 W EP2022078852 W EP 2022078852W WO 2023072664 A1 WO2023072664 A1 WO 2023072664A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- base part
- measuring base
- stator
- conductor elements
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 59
- 238000004804 winding Methods 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
Definitions
- the invention is based on a stator of an electrical machine according to the preamble of the main claim.
- a stator of an electrical machine is already known from DE 102017217355 A1, which has a stator winding and a temperature sensor for detecting an operating temperature of the stator.
- the stator winding comprises conductor elements which are electrically connected to one another.
- a measurement base part is provided on a winding overhang of the stator winding, the temperature sensor being fastened in the sensor receptacle.
- the stator according to the invention with the characterizing features of the main claim has the advantage that the accuracy of the temperature measurement is improved by reducing the influence of disturbances from the environment of the temperature sensor.
- Disturbance variables are, for example, the temperature of the air or the oil in the case of an air-oil phase for oil cooling of the electrical machine.
- this is achieved in that the measuring base part is electrically interposed between two conductor elements of the stator winding or the connection device in such a way that the measuring base part has an electrical current flowing through it during operation.
- the measuring point is located directly at the heat source and not at a distance from the heat source.
- the temperature measurement is thus at least essentially independent of the type of cooling of the electrical machine.
- the measuring base part electrically connects the two conductor elements attached to the measuring base part and represents a single or parallel electrical connection of the two conductor elements. This ensures that electric current flows through the measuring base part during operation.
- the two conductor elements attached to the measuring base part each have a conductor cross section, the conductor cross section of the measuring base part being smaller than one of the conductor cross sections or equal to one of the conductor cross sections of the conductor elements.
- the temperature sensor has a sensor element, in particular an NTC or PTC thermistor, and several sensor connection lines for electrically connecting the sensor element and is also surrounded by an electrically insulating sensor housing, in particular by a tubular sensor casing.
- the measuring base part has a sensor receptacle for accommodating the temperature sensor, in particular the sensor housing.
- the sensor receptacle can be provided in one piece, for example in the form of a bore or recess, or, according to a second variant, can be provided in several pieces on the measuring base part.
- the sensor receptacle of the measuring base part is arranged in a space between the two conductor elements or just outside the space. In this way, the measurement base part can be arranged variably depending on the available installation space.
- the temperature sensor in particular the sensor housing including the sensor element, is fixed in the sensor mount in particular pressed in, clamped or latched, in particular by a detachable fastening part or fastening element.
- the temperature sensor is reliably attached to the measuring base part, in particular detachably, so that the temperature sensor can be easily replaced.
- the fastening part is formed, in particular injection-molded, on the sensor housing, in particular on the sensor casing, and is latched to the measuring base part as a plug. In this way, a very cost-effective attachment of the temperature sensor to the measuring base part is achieved.
- the fastening part can be screwed onto the measuring base part in order to clamp the temperature sensor in the sensor receptacle, with the fastening part having a passage for pushing through the sensor housing of the temperature sensor, with the fastening part being screwed on or in or in the measurement base part, the sensor housing is braced in the sensor receptacle, in particular in cooperation with a conical section of the sensor receptacle.
- the measuring base part according to the third exemplary embodiment has a first base leg for connection to one of the two conductor elements and a second base leg for connection to the other of the two conductor elements, with the two base legs being connected to one another via a leg connector, with the sensor receptacle on is formed or fastened to the leg connector, the measurement base part being formed in particular in the form of sheet metal or in the form of a busbar.
- the production, in particular a welding process is simplified and the quality is improved and the costs are reduced.
- the invention relates to an electrical machine with a stator according to the invention.
- Fig.l shows a stator of an electrical machine with an arrangement of a temperature sensor according to the invention
- FIG. 2 shows a first exemplary embodiment of an arrangement according to the invention of the temperature sensor in a stator according to FIG.
- Fig. 3 is a sectional view along a line III-III in Fig. 2,
- FIGS. 2 and 3 shows a three-dimensional view of the first exemplary embodiment according to FIGS. 2 and 3,
- FIG. 6 shows a second exemplary embodiment of an arrangement according to the invention of the temperature sensor in a stator according to FIG.
- FIG. 7 shows a sectional view of the second exemplary embodiment according to FIG.
- FIG. 8 shows a third exemplary embodiment of an arrangement according to the invention of the temperature sensor in a stator according to FIG.
- Fig. 9 is a sectional view taken along a line IX-IX in Fig. 8
- Fig.10 is a sectional view taken along a line X-X in Fig.8 and
- Fig.ll is a sectional view along a line XI-XI in Fig.8.
- Fig.l shows a stator of an electrical machine with an inventive arrangement of a temperature sensor.
- the stator 1 of an electrical machine has a stator body 2 , a stator winding 3 , a connection device 4 for electrically connecting phase strands of the stator winding 3 and a temperature sensor 6 for detecting an operating temperature of the stator 1 .
- the stator winding 3 and/or the connecting device 4 comprises conductor elements 10 which are electrically connected to one another.
- FIG. 2 shows a first exemplary embodiment of an arrangement according to the invention of the temperature sensor in a stator according to FIG. Fig.3 shows a sectional view taken along a line III-III in Fig.2.
- the conductor elements 10 shown as an example in FIG. 2 can be any pair of conductor elements 10 of the respective end winding 3.1 or of the connection device 4 of the stator according to FIG.
- the measuring base part 11 is electrically interposed between two conductor elements 10 of the stator winding 3 or the connection device 4 in such a way that the measuring base part 11 is electrically traversed along a current path 20 during operation.
- Disturbance variables are, for example, the temperature of the air or the oil in the case of oil cooling with an air-oil phase in the electrical machine.
- the electrical current through the measuring base part 11 is at least a proportion of the electrical current required to operate the machine.
- the two conductor elements 10 are each attached, in particular welded or soldered, to a joint surface 11.1 of the measuring base part 11, for example with a peripheral side 10.1.
- the two conductor elements 10 according to FIG. 2 are each attached, in particular welded or soldered, to a joint surface 11.1 of the measuring base part 11, for example with a peripheral side 10.1.
- the two conductor elements 10 according to FIG. 1 are each attached, in particular welded or soldered, to a joint surface 11.1 of the measuring base part 11, for example with a peripheral side 10.1.
- the measuring base part 11 electrically connects the two conductor elements 10 attached to the measuring base part 11 to one another and in particular represents a single electrical connection between the two conductor elements 10.
- the measuring base part 11 can connect the conductor elements 10 attached to the measuring base part 11 via a parallel branch, not shown, which is electrically parallel is to one other, for example direct, electrical connection of the conductor elements 10 attached to the measuring base part 11.
- the two conductor elements 10 fastened to the measuring base part 11 each have a conductor cross section, wherein the conductor cross section of the measuring base part 11 can be smaller than one of the conductor cross sections or equal to one of the conductor cross sections of the conductor elements 10 .
- the temperature sensor 6 includes a sensor element 6.1, in particular an NTC or PTC thermistor, and several sensor connection lines 6.2 for electrically connecting the sensor element 6.1.
- the temperature sensor 6 is also enclosed by an electrically insulating sensor housing 6.3, for example by a sensor jacket or a casing which is, for example, tubular or hollow-cylindrical.
- the measuring base part 11 has an electrically conductive body with a sensor receptacle 11.2 for accommodating the temperature sensor 6, in particular the sensor housing 6.3.
- the sensor receptacle 11.2 can be made in one piece or in several pieces on the measuring base part 11.
- the sensor receptacle 11.2 can be a channel, a blind hole, a through hole, a slot or a groove in the body of the measuring base part 11, for example.
- the sensor element 6.1 is arranged in the sensor receptacle 11.2 in a sealed or quasi-sealed manner with respect to a cooling medium of the electrical machine, for example.
- the measuring base part 11 is not only electrically interposed between two conductor elements 10, but also in terms of its position in a gap 14 between the corresponding two conductor elements 10 of the stator winding 3 or the connection device 4, including the sensor receptacle 11.2.
- the temperature sensor 6, in particular the sensor housing or the sensor jacket 6.3, is fixed in the sensor receptacle 11.2, for example pressed in, clamped or latched, for example by a detachable fastening part 12 or fastening element 12.
- a fastening element 12 is provided, for example, which is formed, for example molded, on the sensor housing 6.3, in particular on the sensor casing, and is latched to the measuring base part 11 as a plug.
- FIG. 6 shows a second exemplary embodiment of an arrangement according to the invention of the temperature sensor in a stator according to FIG.
- FIG. 7 shows a sectional view of the second exemplary embodiment according to FIG.
- the conductor elements 10 shown as an example in FIG. 6 can be any pair of conductor elements 10 of the respective end winding 3.1 or the connection device 4 of the stator according to FIG.
- the second exemplary embodiment differs from the first exemplary embodiment in the type of attachment in or on the sensor receptacle 11.2.
- a separate fastening part 12 is provided, which can be screwed onto the measurement base part 11 in order to clamp the temperature sensor 6 in the sensor receptacle 11.2.
- the fastening part 12 has a passage 12.1 for pushing through the sensor housing 6.3 of the temperature sensor 6, wherein in the course of screwing the fastening part 12 onto the measuring base part 11, the sensor housing 6.3 is braced in the sensor receptacle 11.2, in particular in cooperation with a conical section 13 of the sensor receptacle
- the sensor receptacle 11.2 of the measuring base part 11 has, for example, an internal thread for screwing in the fastening part 12, and the fastening part 12 has, for example, an external thread
- the sealing of the sensor receptacle 11.2 or the sensor element 6.1 can be achieved, for example, by the detachable fastening element 12 in interaction with the measuring base part 11.
- the sensor receptacle 11.2 is, for example, a blind hole, as a result of which it can be sealed more easily with respect to the cooling medium.
- the measuring base part 11 is not only electrically interposed between two conductor members 10 but also in terms of its position in the gap 14 between the corresponding ones two conductor elements 10 of the stator winding 3 or the connecting device 4 are arranged, including the sensor receptacle 11.2.
- FIG. 8 shows a third exemplary embodiment of an arrangement according to the invention of the temperature sensor in a stator according to FIG.
- the conductor elements 10 shown as an example in FIG. 8 can be any pair of conductor elements 10 of the respective end winding 3.1 or the connection device 4 of the stator according to FIG.
- the third exemplary embodiment differs from the first and second exemplary embodiment in that although the measuring base part 11 is electrically interposed between two conductor elements 10, the sensor receptacle 11.2 of the measuring base part 11 is arranged outside of the intermediate space 14, for example next to the corresponding two conductor elements 10. As a result the electrical and mechanical connection between the corresponding two conductor elements 10 is longer than in the first and second exemplary embodiment.
- the measuring base part 11 has a first base leg 15 for connection to one of the two conductor elements 10 and a second base leg 16 for connection to the other of the two conductor elements 10, the two base legs 15, 16 being connected to one another via a leg connector 17 and wherein the sensor receptacle 11.2 is integrally formed on the leg connector 17, for example by deep-drawing, or as a separate, in particular sleeve-shaped, part.
- the measurement base part 11 is formed, for example, in the shape of sheet metal.
- the two base legs 15, 16 of the measuring base part 11 each have a through-opening 18 for pushing through and joining the conductor elements 10 in a directed manner.
- the conductor elements 10 according to FIG 15:16 to be attached.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22802154.9A EP4423889A1 (de) | 2021-10-29 | 2022-10-17 | Stator einer elektrischen maschine |
CN202280072404.4A CN118176648A (zh) | 2021-10-29 | 2022-10-17 | 电机的定子 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021212225.6 | 2021-10-29 | ||
DE102021212225.6A DE102021212225A1 (de) | 2021-10-29 | 2021-10-29 | Stator einer elektrischen Maschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023072664A1 true WO2023072664A1 (de) | 2023-05-04 |
Family
ID=84331658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/078852 WO2023072664A1 (de) | 2021-10-29 | 2022-10-17 | Stator einer elektrischen maschine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4423889A1 (de) |
CN (1) | CN118176648A (de) |
DE (1) | DE102021212225A1 (de) |
WO (1) | WO2023072664A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016213790A1 (de) * | 2016-07-27 | 2018-02-01 | Volkswagen Aktiengesellschaft | Elektromotor und Verfahren zur Herstellung eines Stators für den Elektromotor |
DE102017123303A1 (de) * | 2016-10-07 | 2018-04-12 | Sc2N | Temperatursensor für einen Stator einer rotierenden elektrischen Maschine |
US20180337580A1 (en) * | 2015-11-25 | 2018-11-22 | Hitachi Automotive Systems, Ltd. | Stator for rotary electric machine and rotary electric machine |
DE102017217355A1 (de) | 2017-09-28 | 2019-03-28 | Robert Bosch Gmbh | Stator einer elektrischen Maschine |
US20200044516A1 (en) * | 2018-08-06 | 2020-02-06 | Ford Global Technologies, Llc | Electric machine thermal management |
US20210028670A1 (en) * | 2015-06-01 | 2021-01-28 | Prime Datum Development Company, Llc | Line Replaceable Unit (LRU) Sensor Systems For Motors And Other Machines |
-
2021
- 2021-10-29 DE DE102021212225.6A patent/DE102021212225A1/de active Pending
-
2022
- 2022-10-17 CN CN202280072404.4A patent/CN118176648A/zh active Pending
- 2022-10-17 WO PCT/EP2022/078852 patent/WO2023072664A1/de active Application Filing
- 2022-10-17 EP EP22802154.9A patent/EP4423889A1/de active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210028670A1 (en) * | 2015-06-01 | 2021-01-28 | Prime Datum Development Company, Llc | Line Replaceable Unit (LRU) Sensor Systems For Motors And Other Machines |
US20180337580A1 (en) * | 2015-11-25 | 2018-11-22 | Hitachi Automotive Systems, Ltd. | Stator for rotary electric machine and rotary electric machine |
DE102016213790A1 (de) * | 2016-07-27 | 2018-02-01 | Volkswagen Aktiengesellschaft | Elektromotor und Verfahren zur Herstellung eines Stators für den Elektromotor |
DE102017123303A1 (de) * | 2016-10-07 | 2018-04-12 | Sc2N | Temperatursensor für einen Stator einer rotierenden elektrischen Maschine |
DE102017217355A1 (de) | 2017-09-28 | 2019-03-28 | Robert Bosch Gmbh | Stator einer elektrischen Maschine |
US20200044516A1 (en) * | 2018-08-06 | 2020-02-06 | Ford Global Technologies, Llc | Electric machine thermal management |
Also Published As
Publication number | Publication date |
---|---|
EP4423889A1 (de) | 2024-09-04 |
DE102021212225A1 (de) | 2023-05-04 |
CN118176648A (zh) | 2024-06-11 |
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