Electric motor specifically configured to power a pump

Abstract

The invention relates to an electric motor (1), in particular configured to power a centrifugal pump (10), the electric motor (1) comprising: - a housing (5), - a stator (201), in particular one or more electrical coils (202) of said stator (201), housed in the housing (5), - a rotor (301), in particular one or more magnets of said rotor (301), housed in the housing (5) and having an axis of rotation (X), - control electronics (400) configured to control the stator (201) and the rotor (301), the control electronics (400) comprising at least one electronic component (401) at least partially surrounded, preferably fully surrounded, by said stator (201) and / or by said rotor (301). Abstract figure: Figure 1

Description

Title of the invention: Electric motor specifically configured to equip a pump. Technical field

[0001] The present invention relates in particular to an electric motor, in particular configured to equip a centrifugal pump, in particular a centrifugal pump intended to be assembled to a multi-function support. Previous technique

[0002] US patent application 20210079920Al describes an electric coolant pump, for example, intended for use as an auxiliary water pump in a vehicle. An electronic circuit board is housed in the pump casing, between the stator / rotor assembly and the pumping chamber. All electronic components are mounted on a printed circuit board. The larger components, for example, a capacitor, create additional bulk (in the direction of the motor's axis of rotation) which can be problematic.

[0003] The invention aims in particular to remedy this problem. Summary

[0004] To this end, the present invention proposes an electric motor, in particular configured to equip a centrifugal pump, the electric motor comprising: - a housing, in particular annular, - a stator, in particular one or more electrical coils of said stator, housed in the casing, - a rotor, in particular one or more magnets of said rotor, housed in the casing and having an axis of rotation, - control electronics configured to control the stator and the rotor, the control electronics comprising at least one electronic component at least partially surrounded by said stator and / or by said rotor, preferably fully surrounded by said stator and / or by said rotor.

[0005] Such a configuration allows the electronic component to be housed inside a virtual cylinder formed by the stator and / or the rotor. Thus, the electronic component does not increase the overall size of the electric motor along the axis of rotation of the rotor. In other words, because the electronic component, which can be relatively bulky along the axis of rotation, is housed inside a virtual cylinder formed by the stator and / or the rotor, the dimension along the axis of rotation of this component does not add to the dimension along the axis of rotation of the stator. rotor. The invention thus proposes to place the capacitor, for example, in the central part, inside the perimeter of the stator and / or rotor.

[0006] According to one embodiment of the invention, the electric motor comprises a housing contained within said casing and having an annular recess, the stator being at least partially housed, preferably fully housed, within said annular recess. The housing notably forms a sealed barrier between the stator and the rotor.

[0007] According to one embodiment of the invention, the casing includes a central housing, the electronic component being at least partially housed, preferably fully housed, in said central housing.

[0008] According to one embodiment of the invention, the rotor is arranged in a peripheral annular housing, between the stator and the casing with respect to the axis of rotation, preferably between the casing and the casing with respect to the axis of rotation.

[0009] According to an example of an embodiment of the invention, the casing is integral with the envelope, preferably with continuity of material with the envelope.

[0010] In other words, according to this particular embodiment, the housing forms a peripheral wall originating from the envelope.

[0011] According to one embodiment of the invention, the control electronics comprise an electronic board, the electronic component being mechanically assembled to said electronic board. According to the embodiment in which the electric motor includes an enclosure, the enclosure notably forms a watertight barrier between the electronic board and the rotor.

[0012] According to one embodiment of the invention, the electronic component has connection tabs soldered onto the electronic board.

[0013] According to one embodiment of the invention, the central housing which receives the electronic component has a substantially cylindrical shape extending along the axis of rotation of the electric motor.

[0014] According to one embodiment of the invention, the electric motor includes a cover configured to close the housing, once the electronic board has been inserted into said housing.

[0015] According to one embodiment of the invention, the cover incorporates an electrical connection interface configured to allow an electrical connection of the electronic board.

[0016] According to one embodiment of the invention, the electric motor includes a sealing gasket, preferably overmolded with the housing, said sealing gasket being installed between the housing and the cover and being configured to allow sealing between said housing and said cover.

[0017] The invention also relates to a centrifugal pump for a vehicle, in particular for an electric vehicle, configured to circulate a heat transfer fluid, comprising an electric motor according to the invention.

[0018] According to an embodiment of the invention, the centrifugal pump comprises: - an impeller, configured to be mobile in rotation in the casing around the axis of rotation, - an annular skirt, integral with the impeller, said annular skirt comprising the rotor, in particular one or more magnets of said rotor, the stator being at least partially positioned between the axis of rotation and the annular skirt, preferably at least partially between the electronic component and the annular skirt.

[0019] The stator is thus radially positioned between at least one electronic component and the rotor.

[0020] Such a configuration makes it possible to reduce the torque required to rotate the impeller, since the rotor has a larger diameter than the stator. In this way, the efficiency of the centrifugal pump is improved.

[0021] According to the embodiment in which the electric motor includes a casing, the casing notably forms a watertight barrier between the stator and the impeller. In particular, according to the embodiment in which the electric motor includes an electronic board, the casing notably forms a watertight barrier between the electronic board and the impeller.

[0022] According to an embodiment of the invention, the annular skirt is arranged in a peripheral annular housing, in particular between the stator and the housing with respect to the axis of rotation, in particular between the envelope and the housing with respect to the axis of rotation.

[0023] According to one embodiment of the invention, the electronic component is housed, in a direction parallel to the axis of rotation, between the electronic board and the paddle wheel.

[0024] According to an embodiment of the invention, the centrifugal pump comprises a volute, in particular assembled to the casing to form said centrifugal pump, the impeller being positioned, in a direction parallel to the axis of rotation, between said volute and the casing.

[0025] According to one embodiment of the invention, the paddle wheel comprises a rotating shaft, said rotating shaft being at least partially housed in an axial housing of said casing.

[0026] According to one embodiment of the invention, the impeller comprises a tubular shaft extending along the axis of rotation, the centrifugal pump comprising a first bearing configured to allow the rotation of the impeller in the casing, said first bearing being installed between said tubular shaft and the volute, preferably said first bearing being at least partially in contact with said tubular shaft and / or with said volute.

[0027] According to one embodiment of the invention, the paddle wheel comprises paddles connecting a hub of the paddle wheel to an external ring of the paddle wheel, the annular skirt extending from said external ring parallel to the axis of rotation.

[0028] According to one embodiment of the invention, the centrifugal pump includes a second bearing configured to allow the rotation of the impeller in the casing, said second bearing being installed between the rotating shaft and the casing, in particular said second bearing being at least partially housed in the axial housing of the casing, preferably said second bearing being at least partially in contact with said rotating shaft and / or with said casing.

[0029] The invention also relates to a multi-function support for a thermal management module, configured to be disposed within a heat transfer fluid circuit, in particular a dielectric fluid, said multi-function support being configured to support at least two fluidic components and comprising: - a plurality of passages, - at least one first component with a fluidic function, said first component with a fluidic function being a centrifugal pump according to the invention.

[0030] According to an exemplary embodiment of the invention, the fluidic components are selected from: - an additional pump, - a valve, - a particle filter, - a sensor, particularly a temperature sensor, - a heat exchanger, - a reservoir.

[0031] According to an example of an embodiment of the invention, the multifunctional support comprises a first portion and a second portion, at least one of the passages being formed by the assembly of said first and second portions, said first and second portions preferably being entirely manufactured by plastic injection.

[0032] According to an example of an embodiment of the invention, an inlet of the centrifugal pump is entirely formed by said multi-function support, preferably by the first or second portion.

[0033] According to an example of an embodiment of the invention, an outlet of the centrifugal pump being entirely formed by said multi-function support, preferably by the first and / or the second portion.

[0034] According to one embodiment of the invention, the volute of the centrifugal pump is at least partially formed by said multi-function support, preferably by at least one of the first and second portions, even more preferably by the assembly of the first and second portions.

[0035] According to one embodiment of the invention, the volute of the centrifugal pump is formed entirely by said multifunctional support, preferably by at least one of the first and second portions, even more preferably by the assembly of the first and second portions.

[0036] The role of the volute is to guide the heat transfer fluid from the inlet to the outlet of the centrifugal pump.

[0037] According to one embodiment of the invention, the volute comprises the inlet and outlet of the centrifugal pump. According to a preferred embodiment of the invention in which the volute is formed entirely by the assembly of the first and second portions, the inlet of the centrifugal pump is formed entirely by the second portion, while the outlet is formed by the assembly of the first and second portions. In other words, a first portion of the outlet, in particular in the form of a half-shell, is formed by the first portion, while a second portion of the outlet is formed by the second portion.

[0038] According to an embodiment of the invention, the centrifugal pump housing is entirely formed by said multi-function support, preferably by at least one of the first and second portions, in particular an annular wall of said housing surrounding the annular skirt is formed by a projection from said multi-function support.

[0039] According to one embodiment of the invention, the centrifugal pump housing is entirely formed by the first portion.

[0040] According to one embodiment of the invention, the casing and the volute are coaxial.

[0041] According to one embodiment of the invention, the multi-function support comprises at least one second component with fluidic function, said second component with fluidic function being chosen from: - an additional pump, - a valve, - a particle filter, - a sensor, in particular a temperature sensor, - a heat exchanger, - a reservoir. Brief description of the drawings

[0042] Other features, details and advantages will become apparent upon reading the detailed description below, and upon analysis of the accompanying drawings, on which:

[0043] [Fig. 1] is a cross-sectional representation of an electric motor according to an example of an embodiment of the invention.

[0044] [Fig.2] is a partial representation of the electric motor of [Fig. 1], the electronic board having been removed.

[0045] [Fig.3] is a representation of the electric motor of [Fig.1], comprising a cover.

[0046] [Fig.4] is a cross-sectional representation of a centrifugal pump comprising the electric motor of [Fig.1].

[0047] [Fig.5] is a representation of a multi-function support according to a first view, said multi-function support comprising a centrifugal pump including the electric motor of the [Fig.1].

[0048] [Fig.6] is a representation of the multifunctional support of [Fig.5] according to a second view.

[0049] [Fig.7] is a representation of the multi-function support of [Fig.5], the centrifugal pump of said multi-function support being shown in exploded view. Description of the implementation methods

[0050] To facilitate reading the figures, the different elements are not necessarily drawn to scale. In these figures, identical elements bear the same reference numerals. Certain elements or parameters may be indexed, that is, designated, for example, as first element or second element, or first parameter and second parameter, etc. This indexing aims to differentiate similar, but not identical, elements or parameters. This indexing does not imply a priority of one element or parameter over another. The designations 'first', 'second', 'third', etc., can thus be interchanged.

[0051] References: Electric motor 1; Casing 2; Impeller 3; Volute 4; Housing 5; Rotating shaft 6; Cover 7; Inlet 8; Outlet 9; Centrifugal pump 10; First bearing 11; Second bearing 12; Tubular shaft 31; Impellers 33; Outer ring 34; Electrical connection interface 71; Thermal management module 100; Multifunction support 101; Passage 102; First section 110; Second section 120; Stator 201; Electrical coils 202; Annular housing 220; Central housing 230; Axial housing 240; Peripheral annular housing 250; Annular skirt 300; Rotor 301; Control electronics 400; Electronic component 401; Electronic board 402; Additional pump 501; Valve 502; Tank 503; X-axis of rotation.

[0052] Figures 1 and 2 show an electric motor 1 according to an example of an implementation of the invention, configured to equip a centrifugal pump 10.

[0053] The electric motor 1 comprises: - a housing 5, - a stator 201, in particular one or more electric coils 202 of said stator 201, housed in the housing 5, - a rotor 301, in particular one or more magnets of said rotor 301, housed in said housing 5 and having an axis of rotation X, - control electronics 400 configured to control the stator 201 and the rotor 301, the control electronics 400 comprising at least one electronic component 401 at least partially surrounded by said stator 201 and / or by said rotor 301, preferably fully surrounded by said stator 201 and / or by said rotor 301. In the illustrated example, the electronic component 401 is fully surrounded by the stator 201 and by the rotor 301.

[0054] Such a configuration allows the electronic component 401 to be housed inside a virtual cylinder formed by the stator 201. Thus, the electronic component 401 does not increase the overall size of the electric motor 1 along the axis of rotation X of the rotor 301. In other words, because the electronic component 401, which can be relatively bulky along the axis of rotation X, is housed inside a virtual cylinder formed by the stator 201, the dimension along the axis of rotation X of this component does not add to the dimension along the axis of rotation X of the stator / rotor 201, 301. The invention thus proposes placing the capacitor, for example, in the central part, inside the periphery of the stator 201.

[0055] The electric motor 1 comprises a housing 2, housed in the casing 5 and having an annular housing 220, the stator 201 being at least partially housed, preferably fully housed, in the annular housing 220. According to the illustrated example, the stator 201 is fully housed in the annular housing 220. The housing 2 notably allows for the formation of a sealed barrier between the stator 201 and the rotor 301.

[0056] The enclosure 2 includes a central housing 230, the electronic component 401 being at least partially housed, preferably fully housed, in the central housing 230. According to the illustrated example, the electronic component 401 is fully housed in the central housing 230.

[0057] According to the illustrated embodiment [Fig. 1], the rotor 301 is arranged in a peripheral annular housing 250, between the stator 201 and the housing 5 with respect to the axis of rotation X, preferably between the casing 2 and the housing 5 with respect to the axis of rotation X.

[0058] According to this embodiment, the housing 5 is integral with the envelope 2, preferably with continuity of material with the envelope 2.

[0059] In other words, according to this particular embodiment, the housing 5 forms a peripheral wall originating from the envelope 2.

[0060] The control electronics 400 includes an electronic board 402, the electronic component 401 being mechanically assembled to said electronic board 402.

[0061] The electronic component 401 has connection tabs soldered onto the electronic board 402.

[0062] The central housing 230 which receives the electronic component 401 has a substantially cylindrical shape extending along the axis of rotation X of the electric motor 1.

[0063] A cover 7, shown [Fig.3], is configured to close the housing 2, once the electronic card 402 has been inserted into said housing 2.

[0064] The cover 7 incorporates an electrical connection interface 71 configured to allow an electrical connection of the electronic board 402.

[0065] According to one embodiment of the invention, the electric motor 1 includes a sealing gasket, not shown in the figures. This sealing gasket is installed between the housing 5 and the cover 7. Preferably, the sealing gasket is overmolded with the housing 5. This sealing gasket is configured to provide a seal between the housing 5 and the cover 7.

[0066] A centrifugal pump 10 for a vehicle, in particular for an electric vehicle, configured to circulate a heat transfer fluid and comprising the electric motor 1, is shown [Fig.4].

[0067] The centrifugal pump 10 comprises: - a paddle wheel 3, configured to be mobile in rotation within the housing 5 around the axis of rotation X, - an annular skirt 300, integral with the paddle wheel 3, said annular skirt 300 comprising the rotor 301, in particular one or more magnets of said rotor 301.

[0068] According to the embodiment shown [Fig.4], the stator 201 is positioned between the axis of rotation X and the annular skirt 300, in particular between the electronic component 401 and the annular skirt 300.

[0069] Such a configuration makes it possible to reduce the torque required to rotate the impeller 3, the rotor 301 having a larger diameter than the stator 201. In this way, the efficiency of the centrifugal pump 10 is improved.

[0070] According to the example embodiment of the centrifugal pump 10 illustrated [Fig.4], the annular skirt 300 is arranged in a peripheral annular housing 250, between the stator 201 and the housing 5, in particular between the casing 2 and the housing 5 with respect to the axis of rotation X.

[0071] The electronic component 401 is housed, in a direction parallel to the axis of rotation X, between the electronic board 402 and the paddle wheel 3.

[0072] The centrifugal pump 10 comprises a volute 4, in particular assembled to the casing 5 to form said centrifugal pump 10, the impeller 3 being positioned, in a direction parallel to the axis of rotation X, between said volute 4 and the casing 2. The role of the volute 4 is to guide the fluid between an inlet 8 and an outlet 9 of the centrifugal pump 10.

[0073] The annular skirt 300 is housed in the casing 5.

[0074] The paddle wheel 3 comprises a rotating shaft 6, said rotating shaft 6 being housed in an axial housing 240 of said envelope 2.

[0075] The impeller 3 comprises a tubular shaft 31 extending along the axis of rotation X. The centrifugal pump 10 comprises a first bearing 11 configured to allow the rotation of the impeller 3 within the housing 5. Said first bearing 11 is installed between said tubular shaft 31 and the volute 4. Preferably, said first bearing 11 is at least partially in contact with said tubular shaft 31 and / or with said volute 4.

[0076] The paddle wheel 3 includes paddles 33 connecting a hub of the paddle wheel 3 to an external ring of the paddle wheel 3, the annular skirt 300 extending from said external ring parallel to the axis of rotation X.

[0077] The centrifugal pump 10 includes a second bearing 12 configured to allow the rotation of the impeller 3 in the housing 5. Said second bearing 12 is installed between the rotating shaft 6 and the casing 2. In particular, said second bearing 12 is housed in the axial housing 240 of the casing 2. Preferably, said second bearing 12 is at least partially in contact with said rotating shaft 3 and / or with said casing 2.

[0078] A multi-function support 101 for a thermal management module 100, configured to be disposed within a heat transfer fluid circuit, in particular a dielectric fluid, and comprising a centrifugal pump 10 including the electric motor 1 is shown in figures 5 to 7.

[0079] The multi-function support 101 is configured to support at least two fluidic function components.

[0080] The multifunction support 101 comprises: - a plurality of passages 102, - at least one first component with a fluidic function, said first component with a fluidic function being a centrifugal pump 10.

[0081] The multi-function support 101 comprises a first portion 110 and a second portion 120, at least one of the passages 102 being formed by the assembly of said first and second portions 110, 120. Said first and second portions 110, 120 are preferably entirely manufactured by plastic injection.

[0082] An inlet 8 of the centrifugal pump 10 is entirely formed by said multi-function support 101, preferably by the first or second portion 110, 120.

[0083] An outlet 9 of the centrifugal pump 10 is entirely formed by said multifunction support 101, preferably by the first and / or second portion 110, 120.

[0084] The volute 4 of the centrifugal pump 10 is at least partially formed by said multi-function support 101, preferably by at least one of the first and second portions 110, 120.

[0085] In particular, the volute 4 of the centrifugal pump 10 is integrally formed by said multi-function support 101, preferably by at least one of the first and second portions 110, 120, even more preferably by the assembly of the first and second portions 110, 120.

[0086] The role of the volute 4 is to guide the heat transfer fluid from the inlet 8 to the outlet 9 of the centrifugal pump 10.

[0087] The volute 4 comprises the inlet 8 and the outlet 9 of the centrifugal pump 10. According to a preferred embodiment of the invention in which the volute 4 is entirely formed by the assembly of the first and second portions 110, 120, the inlet 8 of the centrifugal pump 10 is entirely formed by the second portion 120, while the outlet 9 is formed by the assembly of the first and second portions 110, 120. In other words, a first fraction of the outlet 9, in particular in the form of a half-shell, is formed by the first portion 110, while a second fraction of the outlet 9 is formed by the second portion 120.

[0088] The housing 5 of the centrifugal pump 10 is entirely formed by said multi-function support 101, preferably by at least one of the first and second portions 110, 120, in particular an annular wall of said housing 5 surrounding the annular skirt 300 is formed by a projection from said multi-function support 101.

[0089] In particular, the housing 5 of the centrifugal pump 1 is entirely formed by the first portion 110.

[0090] The housing 5 and the volute 4 are coaxial.

[0091] The multi-function support 101 includes at least one second fluidic function component, said second fluidic function component being selected from: - an additional pump 501, - a valve 502, - a particle filter, - a sensor, in particular a temperature sensor, - a heat exchanger, - a reservoir 503.

Claims

Demands

1. Electric motor (1), in particular configured to equip a centrifugal pump (10), the electric motor (1) comprising: - a housing (5), - a stator (201), in particular one or more electric coils (202) of said stator (201), housed in the housing (5), - a rotor (301), in particular one or more magnets of said rotor (301), housed in the housing (5) and having an axis of rotation (X), - control electronics (400) configured to control the stator (201) and the rotor (301), the control electronics (400) comprising at least one electronic component (401) at least partially surrounded, preferably fully surrounded, by said stator (201) and / or by said rotor (301).

2. Electric motor (1) according to the preceding claim, comprising an enclosure (2) housed in the casing (5) and having an annular housing (220), the stator (201) being at least partially housed, preferably fully housed, in said annular housing (220).

3. Electric motor (1) according to the preceding claim, wherein the housing (2) comprises a central housing (230), the electronic component (401) being at least partially housed, preferably fully housed, in said central housing (230).

4. Electric motor (1) according to any one of claims 2 and 3, wherein the rotor (301) is disposed in a peripheral annular housing (250), between the stator (201) and the housing (5) with respect to the axis of rotation (X), preferably between the casing (2) and the housing (5) with respect to the axis of rotation (X).

5. Electric motor (1) according to any one of the preceding claims, wherein the control electronics (400) comprises an electronic board (402), the electronic component (401) being mechanically assembled to said electronic board (402).

6. A centrifugal pump (10) for a vehicle, in particular for an electric vehicle, configured to circulate a heat transfer fluid, comprising: - an electric motor (1) according to any one of the preceding claims, - a paddle wheel (3), configured to be mobile in rotation in the housing (5) around the axis of rotation (X), - an annular skirt (300), integral with the paddle wheel (3), said annular skirt (300) comprising the rotor (301), in particular one or more magnets of said rotor (301), the stator (201) being at least partially positioned between the axis of rotation (X) and the annular skirt (300), preferably at least partially between the electronic component (401) and the annular skirt (300).

7. Centrifugal pump (10) according to the preceding claim, wherein the impeller (3) comprises a tubular shaft (31) extending along the axis of rotation (X), said centrifugal pump (10) comprising a volute (4), said centrifugal pump (10) comprising a first bearing (11) configured to permit rotation of the impeller (3) in the casing (5), said first bearing (11) being installed between said tubular shaft (31) and said volute (4), preferably said first bearing (11) being at least partially in contact with said tubular shaft (31) and / or with said volute (4).

8. Centrifugal pump (10) according to the preceding claim, in combination with claim 2, wherein the impeller (3) comprises a rotating shaft (6), said rotating shaft (6) being housed in an axial housing (240) of said casing (2), said centrifugal pump (10) comprising a second bearing (12) configured to permit the rotation of the impeller (3) in the casing (5), said second bearing (12) being installed between the rotating shaft (6) and the casing (2), in particular said second bearing (12) being at least partially housed in the axial housing (240) of the casing (2), preferably said second bearing (12) being at least partially in contact with said rotating shaft (3) and / or with said casing (2).

9. Multifunctional support (101) for a thermal management module (100), configured to be disposed within a heat transfer fluid circuit, in particular a dielectric fluid, said multifunctional support (101) being configured to support at least two fluidic components and comprising: - a plurality of passages (102), - at least one first fluidic function component, said first fluidic function component being a centrifugal pump (10) according to any one of claims 6 to 8.

10. Multifunctional support (101) according to the preceding claim, comprising a first portion (110) and a second portion (120), at least one of the passages (102) being formed by the assembly of said first and second portions (110, 120), said first and second portions (110, 120) preferably being entirely manufactured by plastic injection, the housing (5) of the centrifugal pump (10) being entirely formed by said multifunctional support (101), preferably by at least one of the first and second portions (110, 120), in particular an annular wall of said housing (5) surrounding the annular skirt (300) is formed by a projection from said multifunctional support (101).

Images