EP3959802A1 - Elektrische maschine - Google Patents
Elektrische maschineInfo
- Publication number
- EP3959802A1 EP3959802A1 EP20718543.0A EP20718543A EP3959802A1 EP 3959802 A1 EP3959802 A1 EP 3959802A1 EP 20718543 A EP20718543 A EP 20718543A EP 3959802 A1 EP3959802 A1 EP 3959802A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature sensor
- conductor
- carrier
- winding
- electrical machine
- 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.)
- Withdrawn
Links
- 239000004020 conductor Substances 0.000 claims abstract description 73
- 238000004804 winding Methods 0.000 claims abstract description 45
- 230000013011 mating Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012546 transfer 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
-
- 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
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- 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 relates to an electrical machine comprising a stator with a winding, and at least one temperature sensor arrangement comprising a temperature sensor for detecting the temperature in the area of the winding.
- Electrical machines include a rotor and a stator and are used in different areas of application.
- the use of electrical machines for electric hybrid vehicles and electric vehicles or for hub drives is only mentioned as an example. If such an electrical machine is used as a drive machine, it is mostly designed as an internal rotor, which means that the stator surrounds the internal rotor. A wandering magnetic field is generated via the stator, which causes the rotor to rotate.
- the stator has a winding consisting of a large number of conductors, the conductors being assigned to one or usually several phases. The winding is guided around the stator teeth in a manner known per se.
- the number of phases goes into the design of the winding geometry, but also the number of wires per phase as well as the number of wires per slot within the stator toothing and the number of pole pairs.
- This variety of conductors and winding parameters creates a complex network of conductors that is built up using different winding technologies. Examples include the so-called hairpin or bar wave winding.
- the conductors are formed by means of rods bent in a U-shape, which are put together to form a winding basket.
- the conductors are laid on a plurality of radial levels, with the conductors moving from level to level.
- the temperature of individual components must be monitored, for which purpose appropriate temperature sensors, e.g. PTC or NTC sensors can be used.
- One area in which the temperature is to be detected is that of the winding, since one of the hottest points of the stator of the electrical machine prevails in the area of the winding, where a temperature sensor can be installed.
- the hottest point of the stator is namely in the hairpin or rod wave winding area, precisely in the axial center of the Blechpa kets.
- the outer area of the winding is selected.
- the temperature sensor is installed inside the stator, which means that it usually has to be installed at an early stage in the manufacturing process.
- the temperature sensor In order to capture the temperature in the winding area as precisely as possible, it is desirable to attach the temperature sensor as close as possible to or on the winding or winding head, since media flows in the interior, such as water, air, oil, etc., can affect the temperature measurement and therefore with The measurement becomes imprecise as the distance between the temperature sensor and the winding or winding head increases.
- the arrangement of the temperature sensor, in particular on a particularly tightly wound or compactly wound winding, such as a hairpin or a rod-shaped winding, is particularly complicated.
- the invention is based on the problem of specifying a comparatively improved electrical cal machine.
- the invention provides for an electrical machine of the type mentioned at the outset that the ends of at least some of the conductors protrude beyond the winding, some of these ends being connected to an interconnection ring placed axially or radially on the winding, the Temperature sensor arrangement arranged on a conductor and the temperature sensor is thermally coupled to the conductor.
- the temperature sensor arrangement is independent of a connection ring on a conductor, in the usual form egg ner busbar or a busbar, either between the connection ring and line electronics or on a so-called special wire. This is a conductor that is not designed like all common hairpins, geometrically and from the position.
- the temperature sensor can be designed, for example, as a PTC or NTC measuring sensor, which is in thermal contact with the conductor. This enables direct temperature detection on such a conductor or conductor rail, through which current flows and therefore heats up during operation, and thus in the immediate winding area, whereby the radial and axial position of the temperature sensor arrangement and thus the temperature sensor itself are reliable by fixing the temperature sensor arrangement on the conductor itself and is given with reproducible accuracy.
- a copper conductor or a copper bar an optimal heat transfer is achieved, so that undesired error influences and measured value deviations are reliably avoided.
- the temperature sensor arrangement itself expediently has a housing in which the temperature sensor is received and through which the conductor stretches.
- the housing which is placed on the conductor, serves to encapsulate the temperature sensor on the one hand, but also the measuring point on the other, so that very good protection against external influences that have a detrimental effect on the measurement, such as media flows of water, oil, air, etc. can advantageously be avoided and a very precise measurement is possible.
- the housing itself expediently has a carrier on which the temperature sensor is fixed, and a cover which can be releasably fastened to the carrier and closes the housing.
- the housing is thus in two parts, so that it can easily be opened the conductor, which reaches through the housing, can be placed on or placed around the conductor.
- the cover is expediently attached to the carrier via a latching or clamping connection, which enables a very simple connection or simple closing of the housing.
- the latching or clamping connection also enables very simple dismantling in the event of maintenance or repair work, that is to say that the temperature sensor arrangement can easily be replaced even if necessary.
- the temperature sensor itself is preferably arranged on a sensor carrier which has a form-fit contour or onto which a shrink tube having a form-fit contour is drawn, a counter-contour receiving the form-fit contour being provided on the carrier.
- This corresponding contouring of the sensor carrier or shrink tube and carrier enables the sensor carrier or the temperature sensor to be arranged in a reproducible, precise position on the carrier, which also simplifies assembly.
- a Federele element for springing the temperature sensor against the conductor.
- This spring element ensures that the temperature sensor is always brought into a defined thermal coupling to the conductor, as well as any geometric tolerances that can be easily compensated for. This means that the temperature sensor or the sensor carrier on the carrier is slightly movable so that it can be pressed against the spring element.
- the spring element is preferably arranged on the cover and, when the cover is installed, positioned laterally adjacent to the sensor carrier, on the opposite side of which the conductor runs. This means that when the cover is closed or attached, the spring element presses against the sensor carrier or the shrink tubing surrounding it, so that this arrangement with the temperature sensor is pressed against the conductor.
- the sensor carrier is arranged on the carrier so that it can move slightly, so that the spring element springs against the conductor, even with compensation for any small tolerances.
- a curved leaf spring is preferably used as the spring element, which is fastened to the cover in a suitable manner via appropriate fastening means such as latching or clamping sections.
- the housing of the temperature sensor arrangement itself is preferably made of plastic, so it can be manufactured inexpensively in a very simple manner.
- FIG. 1 shows a basic illustration in the form of a partial view of an electrical machine according to the invention
- Figure 2 comprises a perspective view of a temperature sensor device
- Figure 3 is a perspective view of a carrier as part of the temperature sensor arrangement
- FIG. 4 the mounted temperature sensor device on the carrier
- Figure 5 shows the temperature sensor arrangement, attached to the conductor to be detected in a temperature
- Figure 6 is a perspective view of a cover for attachment to the carrier
- FIG. 7 shows the temperature sensor arrangement according to the invention in the open state with the carrier arranged on the conductor and the cover detached
- FIG. 8 shows the arrangement from FIG. 7 from the other side
- FIG. 9 shows the closed temperature sensor arrangement
- FIG. 10 shows a sectional view through the temperature sensor arrangement with a continuous conductor according to FIG. 9.
- FIG. 1 shows, in the form of a partial view, a basic representation of an electrical machine 1 according to the invention, comprising a stator 2 with a winding 3 comprising a plurality of conductors 4, which are assigned to three separate phases in the example shown.
- Each conductor 4 is designed, as it were, as a U-shaped bracket, a large number of such U-shaped conductors 4, often also called hairpins, being plugged together to form the winding 3, which can also be referred to as a winding cage.
- the large number of conductors 4 define different radial planes R, as shown in FIG.
- the conductors 4 extend, depending on the winding scheme, from one radial plane to another radial plane, for example an adjacent radial plane, in the area in which they are connected to the conductor ends of corresponding adjacent conductors 4 continuing the phase conductor.
- the conductors 4 are guided or bent and laid in such a way that corresponding recesses 5 are produced which extend radially so that corresponding
- Stator teeth 6 engage in these recesses 5 or the corresponding conductors 4 are wound between the corresponding grooves of the stator teeth 6.
- the basic structure of such a stator 2 or a winding 3 wound from the separate brackets described is basically known.
- the ends 7 of the conductors 4 protrude axially, as long as the ends 7 end or are positioned on the inner circumference and the outer circumference of the annular winding 3, i.e. they protrude axially from the winding 3.
- These ends 7 are associated with individual conductors 4, which in turn are assigned un different phases, which is why the conductor ends are to be wired according to the laying scheme of the conductor 4.
- a connection ring 8 is used for this purpose, which in the example shown is placed axially on the end face of the winding 3 and is arranged between the conductor ends 7, or engages between them.
- the circuit ring 8 comprises, as will be discussed below, a plurality of corresponding conductors, which can also be referred to as line bridges and are formed from busbars or busbars, usually made of copper, and on connection sections 9 which protrude to the side from the housing 10 of the connection ring 8 and after inserting the connection ring 8, the connection sections 9 are precisely positioned next to the corresponding conductor end 7 with which they are to be connected.
- the connection is made by simple welding, so that all conductors 4 are correctly and phase-specifically connected to one another when they are connected.
- a Stromver supply 1 1 is provided, which is arranged radially next to the winding 3 in the region of the axial end thereof.
- the power supply 1 also called HV terminal, comprises a housing 12 in which corresponding busbars 13 are arranged, which protrude with their connection terminals 14 from the housing 12.
- connection terminals 14 are also provided in the example shown.
- connection terminal 14 is to be connected to one phase of the winding 3. This is implemented in a simple manner in the exemplary embodiment shown in that two conductor ends 7a per phase are guided or bent radially outward, as FIG. 1 clearly shows.
- a temperature sensor arrangement 16 is arranged, that is, directly connected to the conductor 15 in order to directly measure the conductor temperature as a measure of the winding temperature.
- the temperature sensor arrangement 16 comprises a temperature sensor device 17, as shown in FIG.
- the temperature sensor device 17 has a sensor carrier 18 on which a temperature sensor 19 and corresponding connecting lines 20 to a continuing cable 21 are arranged.
- a shrink tube 22 is pulled onto the sensor carrier 18, which has a defined shape in the front end. has closing contour 23 with two suitable undercuts, which are used to mount and position the sensor device 18 on a carrier 24.
- Such a carrier 24 is shown in Figure 3 as a perspective view.
- the carrier 24 is made of plastic and has a cable holding section 25 and an engaging contour section 26 for the interlocking contour 23.
- two axially miteinan the aligned openings 27 are provided through which, which will be entered below, the conductor 15 runs in and out of the housing to be formed by means of the carrier 24 and a cover to be described in the following. Further lateral openings 28, 29 are also closed by means of the cover, which will be discussed below.
- FIG. 4 shows an arrangement in which the temperature sensor device 17 is attached to the carrier 24.
- the cable 21 runs through the cable holding section 25, while the form-fitting contour 23 engages in the engagement contour section 26.
- the arrangement is such that the sensor carrier 18 is virtually vertical, so that the temperature sensor 19 is directed towards the interior of the carrier 24.
- the cover 31 has several latching elements 32 by means of which it is latched on the carrier 24.
- a wall section 33 is provided, on which a spring element 34 is arranged here in the form of a leaf spring 35 which is directed towards the center of the cover.
- This leaf spring 35 serves to spring the temperature sensor device 17 or the sensor carrier 18 and thus the temperature sensor 19 against the conductor 15, which will be discussed below.
- a wall section 36 which is arranged adjacent to the wall section 33, is also provided.
- FIG. 7 shows, the cover 31 is now placed on the carrier 24, as shown by the arrow P2.
- the wall section 36 engages in the opening 28, while the wall section 33 engages in the opening 29.
- the leaf spring 35 comes to lie directly adjacent to the temperature sensor device 17 so that it springs against the conductor 15, and thus the temperature sensor 19.
- the fixing takes place via the snap-in locking elements 32.
- FIG. 9 shows, a closed housing 37 is consequently obtained, FIG. 9 showing the fully assembled temperature sensor arrangement 16.
- the housing 37 is almost completely closed so that any disruptive influences cannot get into the actual measuring range.
- the temperature sensor device 17 or the sensor carrier 18 and thus also the temperature sensor 19 are pressed firmly against the conductor 15 via the leaf spring 35, which, as FIG. 10 shows, can be cast on the cover 31, so that an optimal thermal coupling for an exact measurement is possible.
- the closed housing 37 also provides ideal protection.
- the dismantling is also simple in the event of maintenance .
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019110858 | 2019-04-26 | ||
| DE102019121189.1A DE102019121189A1 (de) | 2019-04-26 | 2019-08-06 | Elektrische Maschine |
| PCT/DE2020/100244 WO2020216402A1 (de) | 2019-04-26 | 2020-03-26 | Elektrische maschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3959802A1 true EP3959802A1 (de) | 2022-03-02 |
Family
ID=72839741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20718543.0A Withdrawn EP3959802A1 (de) | 2019-04-26 | 2020-03-26 | Elektrische maschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12107460B2 (de) |
| EP (1) | EP3959802A1 (de) |
| CN (1) | CN113728534B (de) |
| DE (1) | DE102019121189A1 (de) |
| WO (1) | WO2020216402A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4344033B1 (de) * | 2021-05-17 | 2025-03-12 | Nissan Motor Co., Ltd. | Elektrische drehmaschine und verfahren zur herstellung einer elektrischen drehmaschine |
| WO2024043357A1 (ko) * | 2022-08-24 | 2024-02-29 | 엘지마그나 이파워트레인 주식회사 | 회전전기기계의 스테이터 |
| DE202023002734U1 (de) | 2023-03-09 | 2024-04-16 | Schaeffler Technologies AG & Co. KG | Elektrische Maschine |
| CN116317377B (zh) * | 2023-03-27 | 2026-02-10 | 珠海英搏尔电气股份有限公司 | 温度传感器锁扣、电机、动力总成和交通工具 |
| CN119543544A (zh) * | 2023-08-29 | 2025-02-28 | 法雷奥新能源汽车德国有限责任公司 | 部件安装组件、电机及车辆 |
| DE102023135673A1 (de) * | 2023-12-18 | 2025-06-18 | Valeo Eautomotive Germany Gmbh | Elektrische Maschine mit einer Befestigungsklammer zum thermischen Koppeln eines Temperatursensors mit einer Statorwicklung |
| DE102023135704A1 (de) * | 2023-12-19 | 2025-06-26 | Schaeffler Technologies AG & Co. KG | Stator mit Nutverschlussmittel und Temperatursensor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3607391B2 (ja) * | 1995-12-06 | 2005-01-05 | 株式会社新陽社 | 床板の温度感知構造及びその温度感知方法 |
| JP4716130B2 (ja) | 2006-11-22 | 2011-07-06 | 株式会社デンソー | 回転電機の固定子 |
| DE102013201834B4 (de) | 2013-02-05 | 2026-05-07 | Zf Friedrichshafen Ag | Anordnung zur Temperaturerfassung einer Statorwicklung einer elektrischen Maschine |
| JP5693686B2 (ja) * | 2013-09-09 | 2015-04-01 | 三菱電機株式会社 | 回転電機 |
| JP6259715B2 (ja) | 2014-05-30 | 2018-01-10 | Kyb株式会社 | 回転電機 |
| DE102015106377A1 (de) | 2015-04-24 | 2016-10-27 | Volkswagen Aktiengesellschaft | Messvorrichtung zur Temperaturerfassung einer Statorwicklung |
| US10935434B2 (en) * | 2017-03-16 | 2021-03-02 | Shibaura Electronics Co., Ltd. | Temperature sensor |
| FR3069116B1 (fr) * | 2017-07-17 | 2020-01-24 | Valeo Equipements Electriques Moteur | Machine electrique tournante munie d'un capteur de temperature |
-
2019
- 2019-08-06 DE DE102019121189.1A patent/DE102019121189A1/de active Pending
-
2020
- 2020-03-26 CN CN202080031017.7A patent/CN113728534B/zh active Active
- 2020-03-26 EP EP20718543.0A patent/EP3959802A1/de not_active Withdrawn
- 2020-03-26 US US17/606,169 patent/US12107460B2/en active Active
- 2020-03-26 WO PCT/DE2020/100244 patent/WO2020216402A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN113728534A (zh) | 2021-11-30 |
| US12107460B2 (en) | 2024-10-01 |
| DE102019121189A1 (de) | 2020-10-29 |
| CN113728534B (zh) | 2025-01-03 |
| US20220200412A1 (en) | 2022-06-23 |
| WO2020216402A1 (de) | 2020-10-29 |
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