EP4005069A1 - Elektrische maschine - Google Patents
Elektrische maschineInfo
- Publication number
- EP4005069A1 EP4005069A1 EP20736568.5A EP20736568A EP4005069A1 EP 4005069 A1 EP4005069 A1 EP 4005069A1 EP 20736568 A EP20736568 A EP 20736568A EP 4005069 A1 EP4005069 A1 EP 4005069A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- housing
- electrical machine
- line sections
- machine according
- 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- Withdrawn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
Classifications
-
- 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
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- 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
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
-
- 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, with a machine housing containing a stator with a winding comprising a plurality of conductors assigned to one or more phases, which are interconnected, and a power connection arranged outside the winding, which has one of the number of phases Has number of line sections which are connected on the one hand to the conductors and on the other hand to phase connections or form such.
- Electrical machines comprising a rotor and a stator 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 multiplicity of conductors, the conductors being assigned to one or usually several phases.
- the conductors are formed by means of rods bent in a U-shape, which are plugged together to form a winding cage. The conductors are laid on a plurality of radial levels, with the conductors moving from level to level.
- the invention is based on the problem of specifying an electrical machine with improved cooling.
- the invention provides for an electronic machine of the type mentioned at the outset that the line sections are at least partially received in a connection housing which has a cavity penetrated by the line sections and which after insertion of the line housing into the machine housing with a provided there Coolant channel communicates so that a coolant flowing in the coolant channel flows through the cavity.
- the power connection or the HV terminal usually has a number of number of line sections corresponding to different phases, for example corresponding busbars or the like, which have the input connection at one end and which are connected at their other end either directly or via suitable connecting conductors to the corresponding phase-related conductors of the winding.
- line sections corresponding to different phases, for example corresponding busbars or the like, which have the input connection at one end and which are connected at their other end either directly or via suitable connecting conductors to the corresponding phase-related conductors of the winding.
- connection housing for example a simple plastic housing, in which they are appropriately integrated and protrude at the end with corresponding connection sections for further contact with the power input or the winding conductors.
- This connection housing into which the line section, ie the busbars, or the like, are for example cast or injected, now has a cavity through which the line sections penetrate, that is, they run freely through the cavity.
- the connection housing is inserted at least in sections into a corresponding receptacle in the machine housing.
- the machine housing itself has at least one coolant channel.
- connection housing is integrated on the machine housing in such a way that it is integrated into the existing coolant circuit, so that the line sections can consequently be cooled.
- the line sections are preferably encapsulated in the connection housing and the cavity is formed in the encapsulation. This ensures in a simple manner that the cavity is tight towards the connection housing. Alternatively would be It is of course also conceivable to lay the line sections separately in a housing component and to seal the cavity accordingly.
- a receiving space for the connection housing is preferably formed on the machine housing, the coolant channel opening into the receiving space with an input and an output, and an input and an output of the cavity of the connection housing after insertion into the receiving space with the coolant channel communicates. If the connection housing is consequently pushed into the receiving space with its corresponding section, the coolant channel opening in the receiving space is automatically connected to the cavity so that the coolant can flow.
- This embodiment is very simple and compact, since the connection of the coolant channel interrupted at the receiving space with the cavity results inevitably and without additional assembly effort when the connection housing is inserted into the receiving space.
- the cross-section of the cavity can correspond to the coolant duct cross-section, that is to say that the coolant flows through it quasi directly, only the line sections thereby passing and cooling.
- the cavity has a larger inlet and outlet cross-section than the coolant channel. This means that the cavity is wider than the coolant channel, so that a certain amount of coolant can collect in the cavity. This is advantageous in that it leads to turbulence within the cavity, which is advantageous for the heat transfer from the warm line sections to the cold coolant.
- one or more sealing means are preferably used on the connection housing according to an advantageous further development of the invention provided for sealing the cavity from the machine housing.
- this or these sealing means preferably at least one, in particular at least two sealing rings, a secure seal is ensured that is automatically produced, for example, when the connection housing is inserted into the receiving space. It can in particular be a radially or axially acting sealing means or sealing rings.
- the line sections themselves are provided with an insulating coating, at least in the area in which they reach through the cavity, so that despite the smaller distance between the line sections, there are no short circuits and these cannot be caused by the coolant .
- Busbars are preferably provided as line sections, that is to say stable, solid conductors with a sufficiently large surface area, which is advantageous for good heat exchange.
- busbars are expediently rectangular in cross section and arranged in the cavity in such a way that their longer sides are parallel to the direction of flow of the coolant through the cavity. This means that the coolant flowing in from below, for example, flows against the narrow sides and then flows on the continued flow path along the long sides through the cavity.
- Figure 1 is a partial view of an electrical machine according to the invention with im
- FIG. 2 shows a side view of the arrangement from FIG. 1
- FIG. 3 shows a sectional partial view from FIG. 1 through the motor housing and the connection housing to show the flea space and the line sections extending through it and the coolant channel,
- Figure 4 is a partial view as a plan view of the power connection
- FIG. 5 shows a further partial view, in section, of the power connection
- FIG. 6 shows a basic illustration relating to the fluid flow through the cavity in the
- FIG. 7 shows a basic view to illustrate the circulation of the coolant.
- Figure 1 shows an electrical machine 1 according to the invention, with a machine housing 2, in which, in a known manner, a stator with a winding encompassing a plurality of conductors assigned to one or more phases, which are interconnected, and a corresponding rotor, etc. . is recorded.
- a power connection 3 with a corresponding number of phase connections 4, 5, 6 in the case of the 3-phase machine shown here is used to supply the winding conductors assigned to the different phases.
- the current is provided and regulated in a manner known per se via so-called power electronics.
- the corresponding input conductors coming from the power supply are connected to the phase connections 4, 5, 6 shown in FIG.
- the phase connections 4, 5, 6 are connected to corresponding line sections 7, 8, 9 (see, inter alia, Fi gur 5) or are part of these, the line sections 7, 8, 9 extending in the direction of the winding and further phase connections 10, 11, 12, which are provided here in pairs, have or branch into them.
- the line sections 7, 8, 9 are preferably one-piece bus bars that have all of the phase connections 4, 5, 6 and 10, 11, 12.
- the power connection 3 also has a connection housing 13, which is a cast housing made of plastic. This means that the line sections 7, 8, 9 are cast into this plastic connection housing 13 and firmly embedded in the casting compound.
- the connection housing 13 has a geometry corresponding to the shape of the line sections 7, 8, 9, the line sections 7, 8, 9 being correspondingly more angled due to the position of the phase connections 4, 5, 6 and 10, 11, 12.
- Sectional view through the machine housing 2 and the connection housing 13 shows, inserted into a corresponding receiving space 14 formed in the machine housing 2, this receiving space 14 being open at the front and to the side (see Figure 1) in order to provide the corresponding connection connections.
- a coolant channel 15 is formed, which is part of a cooling system through which a coolant circulates.
- the coolant can be oil, water, a gas or some other cooling medium.
- This coolant channel 15 opens with an inlet 16 or in the receiving space 14, as well as with an outlet 17, as FIG. 3 shows.
- the two flow arrows P indicate by way of example that the coolant flows through the coolant channel 15.
- the cast connection housing 13 has a cavity 18 which is open on two opposite sides and which, see also FIGS. 4 and 5, is penetrated by the line sections 7, 8, 9, so these extend transversely through the cavity 18. Their narrow sides are perpendicular to the direction of flow according to arrow P, while their flat long sides stand parallel to it.
- sealing rings 19 are provided which, see in particular FIG. 3, seal against the machine housing 2. They run in a ring in a corresponding receiving groove 20 of the connection housing 13 around this and are sealing tend to the inner wall of the receiving space 14 of the machine housing 2 over the entire surface. This prevents the coolant from leaking.
- radially acting sealing rings 19 are shown in the example, differently acting sealing ring types, in particular axially acting sealing rings, can also be used. If the same oil is used as the coolant as in the electrical machine, only one sealing ring is sufficient, since then only the power electronics need to be sealed, not the electrical machine.
- FIGS. 6 and 7 show a sectional view through the power connection 3, respectively the connection housing 13 and the cavity 18.
- the primary flow direction in this case is vertical through the cavity 18 and along the longitudinal surfaces of the line sections 7 , 8, 9.
- FIG. 7 shows, there is also a circulation, as shown by the arrows P there, resulting from the fact that, due to a slight offset of the cavity 18 relative to the coolant channel 15, the coolant is not exactly is fed in the middle, but somewhat off-center.
- the line sections 7, 8, 9 are preferably made of copper, but can also consist of a different material. They are expediently provided with a suitable coating in order to exclude any short circuits due to insufficient distance or creepage distances.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019120412 | 2019-07-29 | ||
| DE102019121187.5A DE102019121187A1 (de) | 2019-08-06 | 2019-08-06 | Elektrische Maschine |
| PCT/DE2020/100530 WO2021018337A1 (de) | 2019-07-29 | 2020-06-23 | Elektrische maschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4005069A1 true EP4005069A1 (de) | 2022-06-01 |
Family
ID=71465044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20736568.5A Withdrawn EP4005069A1 (de) | 2019-07-29 | 2020-06-23 | Elektrische maschine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12068649B2 (de) |
| EP (1) | EP4005069A1 (de) |
| CN (1) | CN114026772B (de) |
| WO (1) | WO2021018337A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021018337A1 (de) * | 2019-07-29 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Elektrische maschine |
| US20240396276A1 (en) * | 2023-05-24 | 2024-11-28 | Te Connectivity Solutions Gmbh | Power conector system |
| US20250233483A1 (en) * | 2024-01-11 | 2025-07-17 | Schaeffler Technologies AG & Co. KG | Method and apparatus to passively cool high-power phase connections on a fluid cooled electric machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140319939A1 (en) * | 2011-11-22 | 2014-10-30 | Honda Motor Co., Ltd. | Rotary electric machine |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4311431C2 (de) * | 1993-04-07 | 1995-07-13 | Index Werke Kg Hahn & Tessky | Motorspindel für eine Werkzeugmaschine |
| JP2004215358A (ja) | 2002-12-27 | 2004-07-29 | Toyota Motor Corp | 多相モータ装置 |
| DE10309147A1 (de) * | 2003-02-28 | 2004-09-16 | Rheinisch-Westfälisch- Technische Hochschule Aachen | Elektrische Antriebseinrichtung mit integriertem Umrichter |
| US7872385B2 (en) * | 2007-07-27 | 2011-01-18 | GM Global Technology Operations LLC | Electric motor power connection assembly |
| US8482166B2 (en) * | 2010-11-04 | 2013-07-09 | Remy Technologies, L.L.C. | Electric machine system including an alternating current (AC) electric machine having an expandable coolant manifold |
| JP5804450B2 (ja) * | 2011-11-10 | 2015-11-04 | 株式会社安川電機 | 回転電機 |
| JP5815846B2 (ja) | 2012-03-30 | 2015-11-17 | 本田技研工業株式会社 | 回転電機 |
| US9130421B2 (en) * | 2013-03-14 | 2015-09-08 | Remy Technologies, Llc | L-shaped sheet metal cooling jacket with stamped bearing support |
| JP5812066B2 (ja) | 2013-09-05 | 2015-11-11 | 株式会社安川電機 | モータ駆動装置および車両 |
| DE102014207468A1 (de) | 2014-04-17 | 2015-10-22 | Zf Friedrichshafen Ag | Kühlung für einen Wickelkopf einer E-Maschine |
| CN108292873A (zh) | 2015-10-02 | 2018-07-17 | 动态流有限责任公司 | 具有至少一个绕组的电机部件和电机 |
| DE102015220852A1 (de) | 2015-10-26 | 2017-04-27 | Robert Bosch Gmbh | Elektrische Maschine |
| DE102016004936B4 (de) | 2016-04-23 | 2018-05-30 | Audi Ag | Elektrische Maschine |
| KR102359705B1 (ko) * | 2016-07-20 | 2022-02-08 | 엘지마그나 이파워트레인 주식회사 | 전동기용 케이스 |
| US10523094B2 (en) * | 2017-03-15 | 2019-12-31 | Karma Automotive Llc | Power inverter with liquid cooled busbars |
| JP2019054632A (ja) | 2017-09-14 | 2019-04-04 | 株式会社東芝 | 回転電機 |
| DE102019103191A1 (de) | 2019-02-08 | 2020-08-13 | Schaeffler Technologies AG & Co. KG | Stator für eine elektrische Maschine |
| DE102019110868A1 (de) | 2019-04-26 | 2020-10-29 | Schaeffler Technologies AG & Co. KG | Elektrisches Verbindungsbauteil zur Verbindung einer nassgekühlten, elektrischen Maschine mit einer Leistungselektronik sowie elektrische Antriebseinheit |
| DE102019111825A1 (de) | 2019-05-07 | 2020-11-12 | Schaeffler Technologies AG & Co. KG | Stator für eine elektrische Maschine |
| WO2021018337A1 (de) * | 2019-07-29 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Elektrische maschine |
-
2020
- 2020-06-23 WO PCT/DE2020/100530 patent/WO2021018337A1/de not_active Ceased
- 2020-06-23 CN CN202080045805.1A patent/CN114026772B/zh active Active
- 2020-06-23 EP EP20736568.5A patent/EP4005069A1/de not_active Withdrawn
- 2020-06-23 US US17/629,869 patent/US12068649B2/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140319939A1 (en) * | 2011-11-22 | 2014-10-30 | Honda Motor Co., Ltd. | Rotary electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114026772A (zh) | 2022-02-08 |
| WO2021018337A1 (de) | 2021-02-04 |
| US12068649B2 (en) | 2024-08-20 |
| US20220278578A1 (en) | 2022-09-01 |
| CN114026772B (zh) | 2024-03-22 |
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