EP4454107A1 - Aktuatorvorrichtung - Google Patents
AktuatorvorrichtungInfo
- Publication number
- EP4454107A1 EP4454107A1 EP22836191.1A EP22836191A EP4454107A1 EP 4454107 A1 EP4454107 A1 EP 4454107A1 EP 22836191 A EP22836191 A EP 22836191A EP 4454107 A1 EP4454107 A1 EP 4454107A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator device
- motor assembly
- motor
- housing
- circuit board
- 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
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
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
-
- 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
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/132—Submersible electric motors
-
- 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
- H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
-
- 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
- H02K5/06—Cast metal casings
Definitions
- the present invention relates to an actuator device with an electronics module and a motor assembly that are in contact with one another.
- the electronics module includes a printed circuit board with an electrical circuit arrangement, a plug device and contacting elements for electrical contact with the motor assembly.
- Such actuator devices are manufactured with different design concepts. Most of these consist of a BLDC motor connected to electronics via the motor phase wires. This is usually done by crimping, press-fit or insulation displacement contacts.
- the electronics are separated from the engine compartment with an additional sealing element, such as an end shield/seal, to prevent media from penetrating the engine compartment into the electronics compartment.
- the electronics are glued to a metal plate with a heat-conducting material.
- the thermally conductive material usually has no mechanical function or sealing effect. It is also not possible to seal the engine compartment from the electronics compartment using only the printed circuit board, since the printed circuit board does not have sufficient mechanical stability to seal the housing from the engine compartment.
- the electronics are therefore partly in a separate housing, which is in contact with the motor via a plug-in connection.
- thermally conductive materials are often applied to the top of the electronic components, which create a thermal connection to the housing, so-called gap fillers.
- the electronics compartment is then sealed with a cover that is mechanically attached to the motor housing, for example by laser welding, gluing or bolting with gaskets.
- a housing cover for an electrical machine is known from WO2017/084949A1.
- the housing cover shown there comprises an outer shell made of thermoplastic material and an inner core made of duroplastic material.
- An electrical circuit arrangement is embedded in the inner core and can be connected via electrical connection elements.
- the housing cover is shaped in such a way that it can be used to tightly close an end opening in a housing of an electrical machine.
- the gear compartment can be installed, and in which the engine can run both in air (dry running) and in oil (flooded engine compartment, wet-running).
- the robustness for a wide temperature range and environmental conditions should be guaranteed by different media.
- the actuator device should be scalable for different engines and power classes and the design concept should be simplified in order to reduce the mechanical components and interfaces/sealing levels.
- an actuator device comprising an electronic module and a motor assembly
- the motor assembly comprises a motor housing, a stator, a rotor, a shaft and contact elements emanating from the stator for electrical contact with the electronic module
- the electronic module being on the motor assembly has a molded housing on the side facing away, which materially surrounds the circuit arrangement and in which the plug device is arranged
- the motor housing on its side facing away from the electronics module having a plate which is flanged to the motor housing and on the side facing the electronics module at least one opening in the Motor housing is provided, wherein the electronics module and the motor assembly are mechanically interconnected.
- the electronics module is protected against media, for example salt spray and the effects of moisture, and on the other hand, cooling of the same is ensured.
- media for example salt spray and the effects of moisture
- cooling of the same is ensured.
- the electrical circuit arrangement and the plug device are encased in thermally cured plastic. This can be done, for example, with a duroplast in an injection molding process (e.g. transfer molding, injection molding, compression molding).
- injection molding process e.g. transfer molding, injection molding, compression molding.
- the strength of the casing of the molded module ensures that the electronics module can absorb the back pressure from the oil in the engine compartment without deforming.
- the circuit arrangement can absorb the load directly, without requiring a separation from the engine compartment.
- the electrical circuit arrangement and the plug device can also be cast without tools. This can be done using Dam and Fill.
- the side of the printed circuit board facing away from the motor assembly is encased. This ensures that no edge of the circuit board protrudes from the housing and that it is protected from media.
- the side of the printed circuit board facing the motor assembly has at least partial moldings to protect the respective points from media and chips. If at least partial mold areas are provided instead of none, areas that need to be protected from media or chips can be covered. Furthermore, the mold areas protect any components on this side, for example sensors for determining the operating states of the actuator (pressure, angle of rotation, temperature, etc.) or other electrical assemblies.
- the side of the printed circuit board facing the motor assembly has almost entirely molded areas, with at most the electronic contacting zones to the stator and areas for thermally dissipating electrical losses being free.
- the connector device is advantageously arranged vertically on the printed circuit board. Alternatively, the connector device can also be arranged parallel to the printed circuit board. This offers the possibility to do justice to the respective installation situation in the vehicle.
- Ribs are preferably provided on the mold housing. An additional heat dissipation is possible by means of these cooling fins, which are formed in the encapsulation.
- contacting elements for electrical contact with the at least one contact element emanating from the stator are arranged on the side of the electronics module facing the motor assembly. In this way, the electronics module can simply be plugged onto the motor housing and the electrical contact is established (tolerance compensation/blind assembly).
- the contacting elements are applied using surface mount technology or with reflow soldering or through-hole contacting elements using selective soldering. Attaching the contacting elements via SMT without openings in the printed circuit board ensures that the risk of media migration between the engine compartment and electronics/environment is avoided.
- the electronics module and the motor assembly are preferably connected to one another via thermally conductive adhesive.
- the electronics module and the motor assembly can be connected to one another by means of a foil.
- the electronics module can thus be attached directly to the motor housing and fixed using the media-tight adhesive.
- the thermally conductive adhesive is designed in such a way that it can compensate for the different thermal expansions between the motor housing and the electronic module. There is no need for a time-consuming check of the tightness of the electronics module as a result of the material-locking encapsulation of the electronics.
- the strength of the thermally conductive adhesive is sufficient to ensure mechanical fixation without an additional non-positive connection.
- a further embodiment provides that the electronics module and the motor assembly are connected to one another via a screw connection. Screw holes are provided in the mold housing of the electronics module for this purpose. By means of the screw connection, there is a targeted frictional contact of the lower ones Metallization of the printed circuit board with the metallic motor housing. As a result, the electrical ground of the electrical circuit is connected to the housing or the heat from the electrical losses is dissipated into the motor housing.
- the motor housing is made of an aluminum alloy or an iron alloy.
- a bearing for the shaft is advantageously provided in the plate, which is arranged on the motor housing on the side facing away from the electronic module.
- the motor housing can thus be designed completely open on the side facing away from the electronics module and the motor compartment can be closed off with the plate, which provides the bearing mount for the rotor shaft and a mounting surface for a pump or other actuators.
- a counter bearing for the shaft is provided in the side of the motor housing facing the electronic module. This is the case when the motor housing is designed with partial recesses on this side.
- a counter bearing for the shaft is advantageously arranged in a mold area on the side of the electronic module facing the motor housing.
- a favorable solution provides that the plate has a mounting surface for a pump/or other actuators.
- contact elements of the stator are designed as flat contacts for making contact with the contacting elements of the electronics module. This makes it possible to simply plug the electronics module onto the motor housing in which the stator is located.
- FIG. 1 shows a sectional view of an actuator device according to the prior art
- FIG. 2 shows a sectional view of an actuator device according to the invention
- FIG. 3 shows a sectional view of a further embodiment of the actuator device according to the invention.
- FIG. 1 shows a sectional view of an actuator device 1 known from the prior art.
- the actuator device 1 comprises a motor assembly 2 and an electronics housing 3, which can be made of plastic or metal, with a plug device 4 arranged therein, which protrudes from the electronics housing 3 to the periphery.
- the motor assembly 2 includes a motor housing 5 in which a shaft 6, a rotor 7 and a stator 8 are arranged.
- the motor housing 5 has a cylindrical shape and is open in the direction of the electronics housing 3 .
- a bearing device 9 a is provided in the motor housing 5 , in which the shaft 6 is mounted, which penetrates the motor housing 5 to the side facing away from the electronics housing 3 .
- the motor housing 5 is closed by the electronics housing 3 on the side facing the electronics housing 3 . Furthermore, a bearing plate 11 is provided, in which a second bearing device 9b for the shaft 6 is arranged. Motor phase wires 12 protrude from the stator 8 and penetrate the end shield 11 and are in contact with through-hole contacts 13 described further below.
- the electronics housing 3 is designed as a separate housing and is mechanically fastened and sealed on the motor housing 5 with a housing seal 14 .
- the latter can be done, for example, with laser welding, gluing or screwing with a seal.
- a printed circuit board 15 is arranged on the side of the electronics housing 3 facing the motor housing 5, inside the same, on which side facing away from the motor housing 5 the through-hole contacts 13 for insulation displacement connectors to the motor phase wires 12 as well as circuit arrangements 16 and the plug device 4 are arranged.
- Thermally conductive materials 17 are applied to the upper side of the circuit arrangements 16 (electronic components), which create a thermal connection to the electronics housing 3 in order to achieve additional heat dissipation, so-called gap fillers.
- Other such actuator devices with different design concepts are known. A large number of these consist of a BLDC motor connected to electronics via the motor phase wires.
- the electronics are separated from the engine compartment with an additional sealing element to prevent media from penetrating the engine compartment into the electronics compartment.
- the electronics are glued to a metal plate with a thermally conductive material (WLM).
- WLM thermally conductive material
- the WLM usually has no mechanical function or sealing effect. It is also not possible to seal off the motor compartment from the electronics compartment using only the printed circuit board, since this alone does not have sufficient mechanical stability to form the motor housing closure. Some of the electronics are therefore located in a separate electronics housing, which is connected to the motor via a plug connection.
- thermally conductive materials are often applied to the tops of the electronic components, which create a thermal connection to the electronic housing, so-called gap fillers.
- the electronics compartment is then sealed with a cover that is mechanically attached to the motor housing.
- FIG. 2 shows an actuator device 10 according to the invention, which is described below.
- the actuator device 10 comprises an electronics module 20 and a motor assembly 30, and a plate 40 with an assembly 50 arranged thereon, which can be a pump or an actuator, for example.
- the electronics module 20 includes a printed circuit board 60 with an electronic circuit arrangement 70 for controlling the motor and a connector device 90.
- the connector device 90 is mechanically fastened to the printed circuit board 60.
- This assembly consisting of printed circuit board 60, circuit arrangement 70 and connector device 90 is with a thermosetting plastic (thermosetting plastic) in an injection molding process, which is z. B. can be transfer molding, injection molding or compression molding, completely encased and forms a mold housing 100. Alternatively, this assembly can also be cast without tools (e.g. dam and fill).
- the casing, the molded housing 100 covers the side of the circuit board 60 facing away from the motor assembly 30 and sides 110 of the circuit board 60.
- the encapsulation takes place as follows:
- the circuit board 60 is clamped in the tool by means of hold-down devices in such a way that it is pressed on one side of the tool, in the present case this is the side 120 of the circuit board 60 facing the motor assembly 30.
- this side 120 remains free of mold material.
- a partial molding 130 is arranged on the side 120 facing the motor assembly 30, namely at the point at which the plug device 90 is provided in order to protect it from media or chips.
- the side 120 of the printed circuit board 60 it is also possible, although not shown, for the side 120 of the printed circuit board 60 to be almost completely covered with molding material and only electronic contacting zones for the motor assembly 190 and areas for thermally dissipating electrical losses remain free.
- the latter casing protects any components arranged on this side 120, e.g. B. Sensors for determining the operating conditions of the actuator (pressure, angle of rotation, temperature, etc.) or other electrical assemblies.
- the plastic material is adapted in such a way that, after curing with the circuit board 60 of the electronic system, it represents a module that is planar at room temperature.
- the thermal expansion and rigidity of the components are preferably in the following ranges (mold material 9-14 ppm/K, modulus of elasticity 10-16 GPa, printed circuit board 15-18 ppm/K) and the material exhibits low crosslinking shrinkage ( ⁇ 0.5% ).
- the connector device 90 mounted before the duroplastic molding process is encapsulated with duroplastic on its rear side (area between the connector housing and attachment to the printed circuit board 60), as a result of which the contacts to the printed circuit board 60 are encased and protected with duroplastic in a media-tight manner.
- the connector device 90 is aligned vertically to the printed circuit board 60 in FIG. 2 and includes at least one surface that forms a sealing surface for the overmolding tool during the molding process.
- the electronics encapsulated in this way form the electronics module 20 and, due to their high mechanical stability, are arranged directly on the motor assembly 30, more precisely on a motor housing 100 of the motor assembly 30, without any further housing parts.
- additional heat spreading and an increase in thermal capacity can take place, which leads to a reduction in temperature peaks in the area of power components.
- Cooling ribs can also be provided on the electronic module 20, which contribute to additional cooling of the electronics.
- electrical contacting elements 140 are provided, to which lead frame components 150 are applied by means of surface mount technology and reflow soldering (preferred).
- the SMT contacts 150 are part of a two-part contacting system.
- the second part of the contact system 150 is preferably flat contacts 160 which protrude from the stator 190 of the motor assembly 30 .
- the contact is made by plugging the electronic module 20 onto the motor housing 180 of the motor assembly 30 in which the stator 190 is arranged. Due to its flexibility, the contacting system allows assembly tolerances to be compensated for in all spatial directions and assembly stresses to be absorbed without passing them on to the soldering points on the printed circuit board 60 .
- Motor assembly 30 includes motor housing 180, stator 190, a rotor 200, a shaft 210 and flat contacts 160 pointing from stator 190 in the direction of electronics module 20.
- Motor housing 180 is preferably made of an aluminum or iron alloy.
- the motor housing 180 has a cylindrical shape and is completely open on the side 220 facing away from the electronics module 20 .
- a plate 40 is flanged, which closes off the engine housing 180 and thus the engine compartment.
- a bearing mount 230 is arranged centrally on the plate 40 and the shaft 210 is mounted in it in such a way that it extends centrally through the motor housing 180 .
- the rotor 200 and the stator 190 are arranged around the shaft 210 in a known manner.
- the plate 40 represents a mounting surface for a pump or other actuators (e.g. gearing) 50 on its side facing away from the motor assembly 30.
- motor housing 180 has openings 240, through which contact is made between electronic module 20 and stator 190 of the motor.
- the flat contacts 160 of the stator 170 are arranged in the openings 240 and are in electrical contact with the SMT contacts 150 of the circuit board 60 .
- oil that is conducted from the pump chamber into the engine chamber to cool the engine assembly 30 can wash around the contacts 150, 160 in a targeted manner. This ensures an increased power consumption or power of the motor assembly 30 .
- the targeted oil flow also prevents corrosion of the contacts 150, 160, which can occur when stationary oil comes into contact with Cu contacts.
- the openings 240 can be partially in the motor housing 180 or extended over the entire diameter of the stator 190 so that the electronics are only connected to the motor in the edge area.
- a counter-bearing carrier 250 is arranged, in which shaft 210 of rotor 200 is accommodated.
- a bearing shield can be injection molded from the encapsulating compound on the underside of the printed circuit board 60, which receives the bearing, FIG. 3).
- the electronic module 20 is mechanically connected to the motor assembly 30.
- the electronics module 20 and the motor housing 180 are glued together using a thermally conductive and media-resistant mass (thermally conductive adhesive) 260 .
- a thermally conductive and media-resistant mass thermally conductive adhesive
- gluing can also take place using a foil.
- the thermally conductive material 260 is preferably epoxy-based and filled with ceramic particles, which conduct heat well but do not conduct electricity. Alternatively, other materials, for example based on acrylate, can also be used.
- the properties of the thermally conductive adhesive 260 ensure both tightness and heat transfer. The properties of the adhesive are designed in such a way that they can compensate for the difference in thermal expansion between the molded electronics module 20 and the motor housing 180 .
- FIG. 3 shows a further embodiment of the actuator device 10 according to the invention. Identical parts are provided there with the same reference symbols, reference being made to the description of FIG. The description is given only for the parts that are different in FIGS.
- the connector device 90 of FIG. 3 leading to the periphery is arranged parallel to the printed circuit board 60, in contrast to that of FIG.
- the attachment of the connector device 90 according to Figure 3 is analogous to that in the embodiment according to Figure 2.
- the embodiment according to FIG. 3 differs in that the motor housing 180 has a complete opening 240 on the side facing the electronics module 20 .
- a counter bearing carrier 250 for receiving the shaft 210 is arranged on the circuit board 60 on the side facing the motor assembly 30 . This counter-bearing carrier 250 can be prior to molding on the
- Circuit board 60 are mounted.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021214753.4A DE102021214753A1 (de) | 2021-12-21 | 2021-12-21 | Aktuatorvorrichtung |
| PCT/EP2022/086418 WO2023117780A1 (de) | 2021-12-21 | 2022-12-16 | Aktuatorvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4454107A1 true EP4454107A1 (de) | 2024-10-30 |
Family
ID=84820328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22836191.1A Pending EP4454107A1 (de) | 2021-12-21 | 2022-12-16 | Aktuatorvorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4454107A1 (de) |
| DE (1) | DE102021214753A1 (de) |
| WO (1) | WO2023117780A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023206265A1 (de) * | 2023-07-03 | 2025-01-09 | Robert Bosch Gesellschaft mit beschränkter Haftung | Baueinheit und Verfahren zum Zusammenbau einer Baueinheit mit verbesserter Entwärmung |
| DE102023207408A1 (de) * | 2023-08-02 | 2025-02-06 | Vitesco Technologies GmbH | Fluidpumpe, Kraftfahrzeug, Herstellverfahren für eine solche Fluidpumpe und Verwendung einer solchen Fluidpumpe in einem Wärmetransportmittelkreis(lauf) |
| DE102024114740A1 (de) * | 2024-05-24 | 2025-11-27 | Valeo Eautomotive Germany Gmbh | Elektrische Maschine mit verbesserter elektrischer Verbindung zwischen Statorwicklungen und einem Wechselrichter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19916551A1 (de) | 1999-04-13 | 2000-10-19 | Pierburg Ag | Kühlmitttelpumpe |
| DE102014220288A1 (de) * | 2014-10-07 | 2016-04-07 | Zf Friedrichshafen Ag | Verfahren zum Befestigen zumindest eines Schaltungsträgers in einem Gehäuse sowie Steuergerät |
| JP6365209B2 (ja) | 2014-10-09 | 2018-08-01 | 株式会社デンソー | 電気装置、電気装置の製造方法、および電動圧縮機 |
| AT518125B1 (de) | 2015-11-16 | 2020-01-15 | Melecs Ews Gmbh & Co Kg | Gehäusedeckel für eine elektrische Maschine |
| TWI654370B (zh) | 2016-06-15 | 2019-03-21 | 泓記精密股份有限公司 | Electric fuel pump |
| US11096268B2 (en) * | 2018-07-27 | 2021-08-17 | Dura Operating, Llc | Motor power pack with overmolded printed circuit board integrated connector |
| AT522208A1 (de) * | 2019-03-13 | 2020-09-15 | Melecs Ews Gmbh | Elektrische Maschine |
-
2021
- 2021-12-21 DE DE102021214753.4A patent/DE102021214753A1/de active Pending
-
2022
- 2022-12-16 EP EP22836191.1A patent/EP4454107A1/de active Pending
- 2022-12-16 WO PCT/EP2022/086418 patent/WO2023117780A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023117780A1 (de) | 2023-06-29 |
| DE102021214753A1 (de) | 2023-06-22 |
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