WO2019233599A1 - Electric motor - Google Patents
Electric motor Download PDFInfo
- Publication number
- WO2019233599A1 WO2019233599A1 PCT/EP2018/065167 EP2018065167W WO2019233599A1 WO 2019233599 A1 WO2019233599 A1 WO 2019233599A1 EP 2018065167 W EP2018065167 W EP 2018065167W WO 2019233599 A1 WO2019233599 A1 WO 2019233599A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stator
- motor
- damping element
- electric motor
- fastening seat
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/223—Heat bridges
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/141—Stator cores with salient poles consisting of C-shaped cores
- H02K1/143—Stator cores with salient poles consisting of C-shaped cores of the horse-shoe type
Definitions
- the Invention is directed to an electric motor, preferably to an electric motor for an electric fluid pump of a motor vehicle.
- a motor vehicle electric fluid pump can be provided, for example, to circulate a coolant of a motor vehicle cooling circuit, primarily for cooling an internal combustion engine of the motor vehicle.
- the electric coolant pump and, In particular, the electric motor of the electric coolant pump has to be reliable and failsafe.
- An electric coolant pump for a motor vehicle is disclosed, for example, In WO 2017/220119 Al.
- the electric motor of the electric coolant pump Is provided with a rotatable motor rotor with a rotor shaft extending In an axial motor direction, a static motor frame with two stator fastening seats and a static motor stator being axially fixed to the stator fastening seats by two stator fixing means, i.e. by two screws.
- the motor stator Is provided with a laminated stator body to reduce eddy currents within the motor stator.
- the lamination sheets of the laminated stator body extend substantially In a radial plane and define two cantilever arms which hold a stator coil being attached to a non-fixed section of both cantilever arms.
- the electric motor is provided with a cooling element which Is arranged axially between the stator coil and the motor frame. The cooling element is In thermal contact with the stator coll to allow an efficient dissipation of heat being generated In the
- the electric motor according to the invention Is provided with a rotatable motor rotor with a rotor shaft extending in an axial motor direction, a static motor frame with at least one stator fastening seat, and a static motor stator being fixed to the stator fastening seat.
- the motor frame can be provided Integrally with a static motor housing or can be a separate element being attached to the motor housing.
- the motor frame substantially extends in a radial plane.
- the stator fastening seat axially protrudes from the motor frame and is provided with a substantially axially extending receptacle for a stator fixing means, for example provided with an axial screw hole. This allows a reliable axial fixing of the stator body to the stator fastening seat, which can hold relatively high leverage forces.
- the motor stator is provided with a laminated stator body, i.e. the stator body is composed of a stack of metal lamination sheets made of a ferromagnetic material.
- the lamination sheets extend substantially In radial plane and are stacked In axial direction.
- the laminated stator body minimizes eddy currents in the stator body and, as a result, allows a high motor efficiency.
- the laminated stator body Is relatively or distorted to pre-stress the stator body.
- the lamination sheets define at least one cantilever arm which is fixed on a first lateral end and is self-supporting on the opposite non-fixed lateral end.
- the cantilever arm holds a stator coil which Is arranged at a non- fixed section of the cantilever arm, preferably close to or at a non-fixed lateral cantilever arm end.
- the cantilever arm can be, for example, a stator tooth of a symmetric stator body with numerous stator coils or a connection arm of an asymmetric stator body with a single laterally arranged stator coil.
- the stator body is axially fixed to the stator fastening seat by a stator fixing means, for example by a screw.
- the stator fixing means fixes one lateral end of the cantilever arm at the static and rigid stator fastening seat.
- the stator fixing means and the corresponding stator fastening seat are provided to allow a high axial clamping force and, as a result, a reliable rigid fixation of the stator body at the stator fastening seat, which can also hold relatively high leverage forces.
- the electric motor according to the Invention Is provided with an elastic damping element being arranged axially between the stator coil and the motor frame.
- the damping element is fixed to the motor frame, for example adhesively bonded, and is in touching contact with the stator coll.
- the damping element is not cast on the motor frame and not defined by the motor frame.
- the damping element and the stator fastening seat are provided in such a way that the cantilever arm is at least minimally pre-stressed if the stator body Is fixed to the stator fastening seat.
- the damping element is provided with an axial height being larger than the difference between the axial protrusion height of the stator fastening seat with respect to the motor frame and or distort when the stator body, in particular a stator-coll-remote lateral end of the cantilever arm, Is fixed to the stator fastening seat by the stator fixing means whereby the cantilever arm becomes at least minimally pre-stressed.
- the pre-stressed cantilever arm causes the stator coil to be axially pressed against the elastic damping element so that the damping element is at least minimally compressed, preferably the damping element is compressed by at least 10%.
- the generated axial press force is larger than twice the weight force of the stator coil.
- the axial preload of the stator coil against the damping element suppresses or at least minimizes an axial swinging of the non- flxed cantilever arm section with the stator coil. This minimizes noise and mechanical stress caused by motor vibrations and, as a result, allows a low-noise and long-lifetime electric motor.
- the damping element Is in thermal contact with the stator coll. More preferably, the damping element is made of a material with a high thermal conductivity, preferably at least 1 W/(m-K). This allows an efficient dissipation of heat, which Is generated in the stator coil during the motor operation, via the elastic damping element.
- the axial preload of the stator coil against the elastic damping mean ensures a reliable thermal contact and Improves the heat transfer between the stator coll and the elastic damping element.
- the motor frame comprises at least two laterally spaced stator fastening seats to allow a reliable fixing of the stator body at the motor frame.
- the stator body is provided substantially U-shaped and defines two substantially parallel cantilever arms each being fixed to and laterally extending from a stator fastening seat.
- the stator body also is provided with pole shoe which at least partially surrounds the motor rotor. This allows efficiently driving the motor rotor by a single stator coll being arranged laterally with respect to the motor rotor at the stator body holding branch.
- the motor stator extends substantially in one lateral direction so that the motor electronics can be arranged laterally adjacent to the motor rotor and diametrically opposite to the stator coil which allows a very compact electric motor.
- the motor rotor is arranged between the two stator fastening seats, l.e. the motor rotor and the stator fastening seats are positioned so that a connection line, which connects the centers of the stator fastening seats, intersects the motor rotor.
- the motor rotor Is located In a fixed region of the stator body In which the deformation or distorting of the stator body is minimal. This allows to accurately and reliably align the stator body with respect to the motor rotor and, as a result, allows a high motor efficiency.
- the motor frame is provided Integrally with a motor housing which allows a very simple and compact realization of the electric motor.
- figure 1 shows a schematic top view of an electric motor according to the invention
- figure 2 shows a schematic side view of the electric motor of figure 1 being sectioned along the line II-II of figure 1, wherein a stator body Is not fixed to a stator fastening seat, and
- FIG 3 shows a schematic side view of the electric motor of figure 1 being sectioned along the line II-II of figure 1, wherein the stator body is fixed to the stator fastening seat. rotatably attached to a rotor shaft 12 extending in an axial motor direction.
- the electric motor 8 comprises a motor stator 14 with a substantially U-shaped laminated stator body 16 and a stator coil 18.
- the stator coil 18 is a laminated stator coil.
- the stator coil 18 is electrically connected with a motor electronics 20 for energizing the stator coll 18.
- the electric motor 8 is provided with a static motor frame 21 being Integrally defined by a static motor housing 23.
- the motor frame 21 extends substantially in a radial plane and Is provided with two stator fastening seats 28 axially protruding from a motor frame inside surface 25.
- the stator fastening seats 28 are positioned at opposing radial sides of the motor rotor 12 so that a connection line C, which connects the radial centers of the stator fastening seats 28, Intersects the motor rotor 12.
- the laminated stator body 16 is composed of a stack of ferromagnetic lamination sheets 22 which extend substantially in a radial plane and are stacked in axial direction.
- the lamination sheets 22 are provided substantially U-shaped and define two cantilever arms 24 and a holding branch 26.
- the first cantilever arm 24 Is axially fixed to a first stator fastening seat 28 by a first stator fixing means 30 and the second cantilever arm 24' is axially fixed to a second stator fastening seat 28' by a second stator fixing means 30'.
- the stator fixing means 30 are screws which are axially screwed into corresponding screw holes 32 of the stator fastening seats 28.
- the cantilever arms 24 laterally extend from the stator fastening seats 28 and are parallel with respect to each other. Both cantilever arms 24 are provided with a pole shoe 34 which partially surrounds the motor rotor 10 and defines a magnetic pole 36 of the motor stator 14.
- the holding branch arms 24 In a radial plane.
- the holding branch 26 holds the stator coll 18 which surrounds the holding branch 26.
- the electric motor 8 according to the invention Is provided with an elastic damping element 40 being arranged axially between the motor frame 21 and the stator coil 18.
- the damping element 40 Is a thermally conductive pad made of a material with a high thermal conductivity, preferably higher than 1 W/(m-K), which Is adhesively bond to the motor frame 21 and In thermal contact with the stator coil 18.
- the damping element 40 has an axial height A1 which Is larger than the difference between the axial protrusion height A2 of the stator fastening seat 28 with respect to the motor frame 21 and the axial protrusion height A3 of the stator coll 18 with respect to the stator body 18.
- the stator body 16 is fixed to the stator fastening seat 28 as shown In figure 3, the stator body 16 Is at least minimally distorted and, as a result, pre-stressed so that the stator coll 18 Is axially pressed against the damping element 40 with a press force being larger than twice the weight force of the stator coll 18.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Electric motor (8) comprising a rotatable motor rotor (10) with a rotor shaft (12) extending in an axial motor direction, a static motor frame (21) with at least one stator fastening seat (28), a static motor stator (14) with a laminated stator body (16), wherein the lamination sheets (22) extend substantially in a radial plane and define at least one cantilever arm (24), at least one stator coil (18) being attached to a non-fixed cantilever arm section (38) and at least one stator fixing means (30) for axially fixing the stator body (16) to the stator fastening seat (28), and an elastic damping element (40) being arranged axially between the stator coil (18) and the motor frame (21), wherein the damping element (40) and the stator fastening seat (28) are provided in such a way that the cantilever arm (24) is at least minimally pre-stressed so that the stator coil (18) is axially pressed against the damping element (40).
Description
Electric motor
The Invention is directed to an electric motor, preferably to an electric motor for an electric fluid pump of a motor vehicle.
A motor vehicle electric fluid pump can be provided, for example, to circulate a coolant of a motor vehicle cooling circuit, primarily for cooling an internal combustion engine of the motor vehicle. To avoid damage of the internal combustion engine, the electric coolant pump and, In particular, the electric motor of the electric coolant pump has to be reliable and failsafe.
An electric coolant pump for a motor vehicle is disclosed, for example, In WO 2017/220119 Al. The electric motor of the electric coolant pump Is provided with a rotatable motor rotor with a rotor shaft extending In an axial motor direction, a static motor frame with two stator fastening seats and a static motor stator being axially fixed to the stator fastening seats by two stator fixing means, i.e. by two screws. The motor stator Is provided with a laminated stator body to reduce eddy currents within the motor stator. The lamination sheets of the laminated stator body extend substantially In a radial plane and define two cantilever arms which hold a stator coil being attached to a non-fixed section of both cantilever arms. The electric motor is provided with a cooling element which Is arranged axially between the stator coil and the motor frame. The cooling element is In thermal contact with the stator coll to allow an efficient dissipation of heat being generated In the stator coil during motor operation.
However, since the laminated and, as a result, relatively flexible cantilever arms of the stator body are only fixed on one lateral end, the electric
vehicle or by a rough road. The vibrations can cause a swinging of the non-flxed cantilever arm ends and, as a result, a swinging of the relatively heavy stator coil which, in turn, can cause significant noise and can cause a malfunction or failure of the electric motor.
It is an object of the invention to provide a low- noise electric motor which allows a reliable motor operation for a long motor lifetime, in particular, in vibration loaded application fields.
This object is achieved with an electric motor with the features of claim 1.
The electric motor according to the invention Is provided with a rotatable motor rotor with a rotor shaft extending in an axial motor direction, a static motor frame with at least one stator fastening seat, and a static motor stator being fixed to the stator fastening seat. The motor frame can be provided Integrally with a static motor housing or can be a separate element being attached to the motor housing. The motor frame substantially extends in a radial plane. Preferably, the stator fastening seat axially protrudes from the motor frame and is provided with a substantially axially extending receptacle for a stator fixing means, for example provided with an axial screw hole. This allows a reliable axial fixing of the stator body to the stator fastening seat, which can hold relatively high leverage forces.
The motor stator is provided with a laminated stator body, i.e. the stator body is composed of a stack of metal lamination sheets made of a ferromagnetic material. The lamination sheets extend substantially In radial plane and are stacked In axial direction. The laminated stator body minimizes eddy currents in the stator body and, as a result, allows a high motor efficiency. Furthermore, the laminated stator body Is relatively
or distorted to pre-stress the stator body. The lamination sheets define at least one cantilever arm which is fixed on a first lateral end and is self-supporting on the opposite non-fixed lateral end. The cantilever arm holds a stator coil which Is arranged at a non- fixed section of the cantilever arm, preferably close to or at a non-fixed lateral cantilever arm end. The cantilever arm can be, for example, a stator tooth of a symmetric stator body with numerous stator coils or a connection arm of an asymmetric stator body with a single laterally arranged stator coil.
The stator body is axially fixed to the stator fastening seat by a stator fixing means, for example by a screw. In particular, the stator fixing means fixes one lateral end of the cantilever arm at the static and rigid stator fastening seat. The stator fixing means and the corresponding stator fastening seat are provided to allow a high axial clamping force and, as a result, a reliable rigid fixation of the stator body at the stator fastening seat, which can also hold relatively high leverage forces.
The electric motor according to the Invention Is provided with an elastic damping element being arranged axially between the stator coil and the motor frame. Preferably, the damping element is fixed to the motor frame, for example adhesively bonded, and is in touching contact with the stator coll. In any case, the damping element is not cast on the motor frame and not defined by the motor frame. The damping element and the stator fastening seat are provided in such a way that the cantilever arm is at least minimally pre-stressed if the stator body Is fixed to the stator fastening seat. In particular, the damping element is provided with an axial height being larger than the difference between the axial protrusion height of the stator fastening seat with respect to the motor frame and
or distort when the stator body, in particular a stator-coll-remote lateral end of the cantilever arm, Is fixed to the stator fastening seat by the stator fixing means whereby the cantilever arm becomes at least minimally pre-stressed. The pre-stressed cantilever arm causes the stator coil to be axially pressed against the elastic damping element so that the damping element is at least minimally compressed, preferably the damping element is compressed by at least 10%. Preferably, the generated axial press force is larger than twice the weight force of the stator coil. The axial preload of the stator coil against the damping element suppresses or at least minimizes an axial swinging of the non- flxed cantilever arm section with the stator coil. This minimizes noise and mechanical stress caused by motor vibrations and, as a result, allows a low-noise and long-lifetime electric motor.
In a preferred embodiment of the Invention, the damping element Is in thermal contact with the stator coll. More preferably, the damping element is made of a material with a high thermal conductivity, preferably at least 1 W/(m-K). This allows an efficient dissipation of heat, which Is generated in the stator coil during the motor operation, via the elastic damping element. The axial preload of the stator coil against the elastic damping mean ensures a reliable thermal contact and Improves the heat transfer between the stator coll and the elastic damping element.
Preferably, the motor frame comprises at least two laterally spaced stator fastening seats to allow a reliable fixing of the stator body at the motor frame. More preferably, the stator body is provided substantially U-shaped and defines two substantially parallel cantilever arms each being fixed to and laterally extending from a stator fastening seat. The stator body also
is provided with pole shoe which at least partially surrounds the motor rotor. This allows efficiently driving the motor rotor by a single stator coll being arranged laterally with respect to the motor rotor at the stator body holding branch. As a result, the motor stator extends substantially in one lateral direction so that the motor electronics can be arranged laterally adjacent to the motor rotor and diametrically opposite to the stator coil which allows a very compact electric motor.
In a preferred embodiment of the invention, the motor rotor is arranged between the two stator fastening seats, l.e. the motor rotor and the stator fastening seats are positioned so that a connection line, which connects the centers of the stator fastening seats, intersects the motor rotor. As a result, the motor rotor Is located In a fixed region of the stator body In which the deformation or distorting of the stator body is minimal. This allows to accurately and reliably align the stator body with respect to the motor rotor and, as a result, allows a high motor efficiency. Preferably, the motor frame is provided Integrally with a motor housing which allows a very simple and compact realization of the electric motor.
An embodiment of the Invention is described with reference to the enclosed drawings, wherein
figure 1 shows a schematic top view of an electric motor according to the invention,
figure 2 shows a schematic side view of the electric motor of figure 1 being sectioned along the line II-II of figure 1, wherein a stator body Is not fixed to a stator fastening seat, and
figure 3 shows a schematic side view of the electric motor of figure 1 being sectioned along the line II-II of figure 1, wherein the stator body is fixed to the stator fastening seat.
rotatably attached to a rotor shaft 12 extending in an axial motor direction. The electric motor 8 comprises a motor stator 14 with a substantially U-shaped laminated stator body 16 and a stator coil 18. In the present embodiment of the invention, the stator coil 18 is a laminated stator coil. The stator coil 18 is electrically connected with a motor electronics 20 for energizing the stator coll 18. The electric motor 8 is provided with a static motor frame 21 being Integrally defined by a static motor housing 23. The motor frame 21 extends substantially in a radial plane and Is provided with two stator fastening seats 28 axially protruding from a motor frame inside surface 25. The stator fastening seats 28 are positioned at opposing radial sides of the motor rotor 12 so that a connection line C, which connects the radial centers of the stator fastening seats 28, Intersects the motor rotor 12.
The laminated stator body 16 is composed of a stack of ferromagnetic lamination sheets 22 which extend substantially in a radial plane and are stacked in axial direction. The lamination sheets 22 are provided substantially U-shaped and define two cantilever arms 24 and a holding branch 26. The first cantilever arm 24 Is axially fixed to a first stator fastening seat 28 by a first stator fixing means 30 and the second cantilever arm 24' is axially fixed to a second stator fastening seat 28' by a second stator fixing means 30'. In the present embodiment of the invention, the stator fixing means 30 are screws which are axially screwed into corresponding screw holes 32 of the stator fastening seats 28.
The cantilever arms 24 laterally extend from the stator fastening seats 28 and are parallel with respect to each other. Both cantilever arms 24 are provided with a pole shoe 34 which partially surrounds the motor rotor 10 and defines a magnetic pole 36 of the motor stator 14. The holding branch
arms 24 In a radial plane. The holding branch 26 holds the stator coll 18 which surrounds the holding branch 26.
The electric motor 8 according to the invention Is provided with an elastic damping element 40 being arranged axially between the motor frame 21 and the stator coil 18. In the present embodiment of the invention, the damping element 40 Is a thermally conductive pad made of a material with a high thermal conductivity, preferably higher than 1 W/(m-K), which Is adhesively bond to the motor frame 21 and In thermal contact with the stator coil 18. If the stator body 16 Is not yet fixed to the stator fastening seat 28 as shown In figure 2, the damping element 40 has an axial height A1 which Is larger than the difference between the axial protrusion height A2 of the stator fastening seat 28 with respect to the motor frame 21 and the axial protrusion height A3 of the stator coll 18 with respect to the stator body 18. As a result, If the stator body 16 is fixed to the stator fastening seat 28 as shown In figure 3, the stator body 16 Is at least minimally distorted and, as a result, pre-stressed so that the stator coll 18 Is axially pressed against the damping element 40 with a press force being larger than twice the weight force of the stator coll 18.
Claims
C L A I M S
1. Electric motor (8) comprising
a rotatable motor rotor (10) with a rotor shaft (12) extending In an axial motor direction,
a static motor frame (21) with at least one stator fastening seat (28),
a static motor stator (14) with
a laminated stator body (16), wherein the lamination sheets (22) extend substantially In a radial plane and define at least one cantilever arm (24),
at least one stator coll (18) being attached to a non-flxed cantilever arm section (38) and
at least one stator fixing means (30) for axially fixing the stator body (16) to the stator fastening seat (28), and
an elastic damping element (40) being arranged axially between the stator coil (18) and the motor frame (21),
wherein the damping element (40) and the stator fastening seat (28) are provided In such a way that the cantilever arm (24) is at least minimally pre-stressed so that the stator coll (18) Is axially pressed against the damping element (40).
2. Electric motor (8) according to claim 1, wherein the damping element (40) is In thermal contact with the stator coll (18).
3. Electric motor (8) according to claim 2, wherein the damping element (40) Is made of a material with a high thermal conductivity, preferably at least 1 W/(m-K).
seats (28). 5. Electric motor (8) according to claim 4, wherein the stator body (16) is provided substantially U-shaped and defines
two substantially parallel cantilever arms (24) each being fixed to and laterally extending from a stator fastening seat (28) and
a holding branch (26) holding the stator coll (18) and being attached to a non-fixed section (38) of both cantilever arms.
6. Electric motor (8) according to claim 4 or 5, wherein the motor rotor (12) is arranged between the two stator fastening seats (28).
7. Electric motor (8) according to any preceding claim, wherein the motor frame (21) Is provided integrally with a motor housing (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/065167 WO2019233599A1 (en) | 2018-06-08 | 2018-06-08 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/065167 WO2019233599A1 (en) | 2018-06-08 | 2018-06-08 | Electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019233599A1 true WO2019233599A1 (en) | 2019-12-12 |
Family
ID=62599584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2018/065167 Ceased WO2019233599A1 (en) | 2018-06-08 | 2018-06-08 | Electric motor |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2019233599A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210384802A1 (en) * | 2019-02-25 | 2021-12-09 | Denso Corporation | Rotating electrical machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2384533A2 (en) * | 2009-01-02 | 2011-11-09 | Robert Bosch GmbH | Electronically commutated electric machine |
| US20140239753A1 (en) * | 2013-02-26 | 2014-08-28 | GM Global Technology Operations LLC | Motor housing assembly and method |
| WO2017220119A1 (en) | 2016-06-20 | 2017-12-28 | Pierburg Pump Technology Gmbh | Electric fluid pump for a motor vehicle |
-
2018
- 2018-06-08 WO PCT/EP2018/065167 patent/WO2019233599A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2384533A2 (en) * | 2009-01-02 | 2011-11-09 | Robert Bosch GmbH | Electronically commutated electric machine |
| US20140239753A1 (en) * | 2013-02-26 | 2014-08-28 | GM Global Technology Operations LLC | Motor housing assembly and method |
| WO2017220119A1 (en) | 2016-06-20 | 2017-12-28 | Pierburg Pump Technology Gmbh | Electric fluid pump for a motor vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210384802A1 (en) * | 2019-02-25 | 2021-12-09 | Denso Corporation | Rotating electrical machine |
| US12068670B2 (en) * | 2019-02-25 | 2024-08-20 | Denso Corporation | Rotating electrical machine |
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