• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This motor (10) comprises: - a frame (12) defining an internal volume in which is housed a rotor (14) and a stator (16), - at least one cooling circuit (30), comprising an inlet (32) primary and primary outlet (34) in fluid communication with the outside of the frame (12), - at least one external cooling device (20) on the frame (12) comprising a secondary air inlet (22) and an outlet secondary air (24), a pipe (26), at least one secondary cooling circuit (40) separated from the primary circuit (30), passing through the rotor (14) and in fluid communication with the secondary inlet and the secondary outlet of the cooling device (20). The secondary cooling circuit (40) is traversed by a channel (36) of the primary cooling circuit (30) supplying the stator (16) with the gaseous fluid from outside the frame (12).
    公开号:FR3032568A1
    申请号:FR1550941
    申请日:2015-02-06
    公开日:2016-08-12
    发明作者:Andry Randria；Bruno Raguin
    申请人:Alstom Transport Technologies SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an electric motor, comprising a primary cooling circuit for cooling a stator and a secondary cooling circuit for cooling a rotor. Usually, the primary coolant circuit is in fluid communication with the exterior of the motor housing so as to allow cooling of the stator by circulating the ambient air in the primary cooling circuit. Generally, the secondary circuit is, in turn, not in fluid communication with the outside of the frame of the electric motor in order to prevent dust or the like from coming to trap or foul the moving part of the engine. Therefore, the secondary circuit is connected to a cooling device extending outside the engine, so as to allow a heat exchange between the gaseous fluid flowing in closed circuit in the secondary circuit and the outside air by the wall of the cooling device.
    [0002] Such an electric motor is for example described in document US Pat. No. 6,891,290. However, the architecture of such an electric motor implies that the secondary cooling circuit of the rotor intersects the primary cooling circuit of the stator. This crossing of the two circuits hinders the cooling efficiency of the primary stator cooling circuit because the total volume of the primary cooling circuit must be limited in order to pass the secondary cooling circuit. One of the aims of the invention is to provide an electric motor comprising cooling circuits for efficient and simple cooling of the stator and the rotor of the electric motor. For this purpose, the subject of the invention is an electric motor, comprising: a frame defining an internal volume in which is housed a rotor and a stator; at least one primary cooling circuit passing through the stator, comprising a primary input and a primary outlet in fluid communication with the outside of the frame, a gaseous fluid coming from outside the frame penetrating by said primary inlet being intended to circulate in said primary cooling circuit and to leave said circuit by said primary output, - at least a cooling device outside the frame comprising a secondary air inlet and a secondary air outlet, said secondary inlet and said secondary outlet being in fluid communication with the internal volume of the frame, a pipe connecting said secondary inlet and said outlet secondary, extending at least partly outside the frame, 3032568 2 - at least one cooling circuit secondary flow, separated from the primary circuit, passing through the rotor and in fluid communication with the secondary inlet and the secondary outlet of the cooling device, a gaseous fluid internal to the secondary cooling circuit being intended to circulate in said secondary cooling circuit and in said external cooling device, characterized in that the secondary cooling circuit is traversed by a channel of the primary cooling circuit supplying the stator with the gaseous fluid coming from outside the frame. The advantages of such an electric motor are manifold and are summarized in a non-exhaustive manner below. The primary stator cooling circuit effectively cools the stator of the electric motor, thereby increasing the life of the motor and / or operating at a higher power as it is no longer necessary to interrupt the primary cooling circuit to pass the secondary cooling circuit. The total volume of the primary cooling circuit is thus increased so that the amount of gaseous cooling fluid is greater. The primary circuit according to the invention also makes it possible to improve the cooling of the secondary circuit by making it possible to have a second heat exchange zone 20 between the outside air and the gaseous fluid circulating in the secondary cooling circuit in addition to the heat exchange zone extending outside the motor housing. Indeed, a heat exchange is established between the air coming from the outside flowing in the primary cooling circuit and the gaseous fluid flowing in the secondary cooling circuit at the level of the channel of the primary cooling circuit passing through the cooling circuit. secondary. Advantageously, an electric motor according to the invention may comprise one or more of the following characteristics, taken alone or in any technically feasible combination: the channel passes through the secondary cooling circuit transversely so as to separate the gaseous flow flowing in the secondary cooling circuit in two flows passing around the channel; the channel passes through the secondary cooling circuit mainly in a direction substantially parallel to an axis of rotation of a motor shaft; the channel is arranged between the primary inlet and a part of the primary cooling circuit passing through the stator; The channel comprises a section of conical shape with an upstream vertex of the air flow and a base downstream; the channel has a diameter of between 10 and 50 mm; several cooling devices outside the frame are arranged around the frame; - a radial fan is mounted on the motor shaft to accelerate a gas flow in the secondary cooling circuit; the radial fan makes it possible to simultaneously accelerate a gaseous flow in the primary cooling circuit and a gaseous flow in the secondary cooling circuit; the pressure in the secondary cooling circuit is greater than the pressure in the primary cooling circuit. The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the drawings, in which: FIG. 1 is a partial sectional view in the direction of the axis of rotation X-X 'of the rotor; - Figure 2 is a partial sectional view along the plane B-B of Figure 1. There is shown in Figures 1 and 2, an electric motor 10 according to a first embodiment of the invention. The electric motor 10 comprises a frame 12 defining a volume internal to the motor 10 in which is housed a rotor 14 and a stator 16. The rotor 14 is mounted to rotate with a rotation shaft 18 inside the frame 12 and mounted rotatably about an axis of rotation XX 'with respect to the stator 16. The stator 16 surrounds the rotor 14 parallel to the axis of rotation XX' inside the frame 12. In a conventional manner, the rotor 14 and the stator 16 make it possible to transform an electric energy into a mechanical energy delivered by the rotor shaft 18. According to one embodiment, a primary cooling circuit 30 comprises a primary inlet 32 and a primary outlet 34, each in fluid communication with the outside of the frame 12. By this is meant that the ambient air is able to enter the primary cooling circuit 30 through the primary inlet 32 and to return to the outside through the outlet 34 primary. The primary input 32 and the primary output 34 are interconnected by at least one primary line 37 passing through the stator 16 and extending for example along an axis substantially parallel to the axis of rotation X-X '. The primary cooling circuit 30, shown in FIG. 1, allows a gaseous fluid, that is to say the ambient air, coming from the outside of the frame 12 to rush into the primary inlet 32 . The external gaseous fluid FE is guided by the primary cooling circuit 30 through the internal volume of the frame 12 and more particularly 3032568 4 through the stator 16 to cool the latter. The primary pipe 37 indeed allows a heat exchange between the external gaseous fluid FE and the stator 16. The primary outlet 34 finally makes it possible to discharge the external gaseous fluid FE that is heated towards the outside of the frame 12. Thus, the frame 12 and the stator 16 are cooled by the ambient air 5 coming from the environment of the engine 10. In the present description, the terms "upstream" and "downstream" are defined with respect to the flow direction of a flow of gaseous fluid in the engine 10. A secondary cooling circuit 40, shown in FIG. 1, comprises at least one tunnel 28. This tunnel 28 is connected at its ends by two radial passages at the inlet 22 and the outlet 24 of the device 20 cooling. The tunnel 28 extends substantially parallel to the axis of rotation X-X ', and thus forms at least one opening through the rotor 14. The circuit 40 is isolated from the primary cooling circuit 30, i.e. say that there is no fluid communication between the primary cooling circuit and the secondary cooling circuit. An internal gaseous fluid FI fills the secondary cooling circuit 40. This gaseous fluid, for example air, is isolated from the ambient air because there is no fluid communication between the secondary cooling circuit and the outside of the frame. A cooling device 20 outside the frame 12 is connected by a secondary air inlet 22 and a secondary air outlet 24 to the secondary cooling circuit extending into the internal volume of the frame. The secondary air inlet 22 and the secondary air outlet 24 are in fluid communication with each other and are connected by a secondary pipe 26. The shaft 18 of the rotor 14 is equipped with a fan 50 comprising at least two secondary blades 54 capable of circulating the internal gaseous fluid F1 inside the secondary circuit 40 and the cooling device 20. The circulation of the gaseous fluid is called secondary gas flow. The secondary blades 54 are for example located upstream of the secondary inlet 22 of the cooling device 20 and downstream of the secondary outlet 24 of the cooling device 20. The fan 50 is, for example, a radial fan extending into the internal volume of the frame 12 of the engine 10. Thus, an interior gas flow is created which drives the internal gaseous fluid F1 from the rotor 14 to the cooling device 20 and from the device 20 for cooling to the rotor 14. The circulation of the gaseous fluid between the secondary cooling circuit 40 and the cooling device 20 allows the internal gaseous fluid F1 to be cooled in the cooling device 20 by heat exchange between the cooling device and the ambient air and then circulating in the rotor 14 to cool it. The internal gaseous fluid FI heated during its passage through at least one tunnel of the rotor 14 is then returned to the external cooling device 20 where it is again cooled by heat exchange with the ambient air during its passage through the pipe. secondary 26 of the cooling device 20. Thus, the rotor 14 is cooled by the internal gaseous fluid FI. According to one embodiment, the fan 50 is also arranged to promote the circulation of air in the primary cooling circuit, for example by means of at least one primary blade 52 able to create a primary gas flow intended to circulate. in the primary cooling circuit 30. The primary blade 52 is for example located downstream of the primary inlet 32 and upstream of the primary pipe 37 of the primary cooling circuit 30. Thus, the fan 50 makes it possible to simultaneously create a gaseous flow in the primary cooling circuit 30 and a gaseous flow in the secondary cooling circuit 40.
    [0003] The secondary blades 54 each have a larger diameter than the primary blade 52. Thus, the pressure inside the secondary cooling circuit 40 is greater than the pressure inside the primary cooling circuit. In this case, the seal is guaranteed between the primary cooling circuit 30 and the secondary cooling circuit 40.
    [0004] According to the invention, the secondary cooling circuit 40 is traversed by a channel 36 of the primary cooling circuit 30 supplying the stator 16 with the external gaseous fluid. The channel 36 is for example interposed between the primary inlet 32 and the duct 37 passing through the stator 16, that is to say that the channel 36 is in fluid communication, on the one hand, with the primary inlet 32 of the primary cooling circuit 30 and secondly with the pipe 37 passing through the stator 16. Such a channel 36 makes it possible to cross the secondary cooling circuit 40 and the primary cooling circuit 30 without having to interrupt or reduce the diameter of the secondary cooling circuit 40. In addition, the channel 36 forms an additional heat exchange zone between the external gaseous fluid FE circulating in said channel 36 of the primary cooling circuit 30, and the internal gaseous fluid F1 flowing in the secondary cooling circuit 40 in addition to the the heat exchange zone extending at the level of the cooling device. According to the embodiment described, the channel 36 has a greater diameter than a primary pipe 37 of the primary cooling circuit 30. This enables several primary lines 37 of the primary cooling circuit 30 to be fed simultaneously with the external gaseous fluid. The diameter of the primary pipe 30 is, for example, between 10 and 50 mm. For example, forty primary lines 37 are fed through the channel 36 of the primary cooling circuit. In this case, the channel 36 allows a sufficient supply of external gaseous fluid to effectively cool the stator 16 of the motor 10.
    [0005] As shown in FIG. 2, the channel 36 passes through the secondary cooling circuit 40 so as to separate a flow of the internal gaseous fluid into two streams passing respectively on one side of the channel 36. The two separate streams of the internal gaseous fluid are thus cooled by the channel 36. The channel 36 passes through the secondary cooling circuit 40 mainly in a direction substantially parallel to the axis of rotation XX 'of the shaft 18 of the engine 10. The channel 36 is located downstream of the primary inlet 32 and upstream of at least one primary pipe 37 of the primary cooling circuit. Thus, it is ensured that the external gaseous fluid passing through the channel 36 is not yet heated by the stator 16 of the motor 10. In this case, the external gaseous fluid can cool the internal gaseous fluid through the primary line 37. channel 36 locally reduces the volume of the secondary cooling circuit 40 and thus creates a Venturi effect in the secondary cooling circuit 40. For this purpose, the flow of the internal gaseous fluid FI is accelerated at the channel 36, which allows an increase in the heat exchange between the channel 36 and the internal gaseous fluid FI. The channel 36 of the primary cooling circuit 30 passes through the secondary cooling circuit 40 upstream of the cooling device 20 of the secondary cooling circuit 40. This allows the internal gaseous fluid FI of the secondary cooling circuit 40 to be cooled by the channel 36. According to one embodiment, the channel 36 has a conical section with a top 38 extending upstream of the fluid. internal gas IF of the secondary cooling circuit 40 and a base 39 extending downstream from this internal gaseous fluid FI, as shown in FIG. 2. Thus, the disturbances of the gas flow through the channel 36 are reduced. Various other aerodynamic shapes of the section of the channel 36 may be envisaged, for example to increase the heat exchange between the secondary cooling circuit 40 and the primary cooling circuit 30 and / or to modify the secondary flow. In a second embodiment not shown, several cooling devices 20 are arranged around the frame 12 of the engine 10. Each cooling device 20 is in fluid communication with the or a secondary cooling circuit 40. All the secondary cooling circuits 40 pass through the rotor 14 of the motor 10. Thus, the cooling of the motor 10, in particular of the rotor 14, is increased. This makes it possible to increase the level of performance of the engine 10, while ensuring optimum, efficient and simple cooling.
    [0006] The total cooling of the engine 10 produced by the primary cooling circuit 30 and the secondary cooling circuit 40 has at least a power of 12 kW. The mechanical power delivered by the shaft 18 of the motor 10 is at least 400 kW. 10
    权利要求:
    Claims (10)
    [0001]
    Electric motor (10), comprising: - a frame (12) defining an internal volume in which is housed a rotor (14) and a stator (16), - at least one primary cooling circuit (30) passing through the stator (16), comprising a primary inlet (32) and a primary outlet (34) in fluid communication with the outside of the frame (12), a gaseous fluid from outside the frame (12) penetrating through said primary inlet being intended to circulate in said primary cooling circuit and to exit from said circuit by said primary output, - at least one external cooling device (20) to the frame (12) comprising a secondary air inlet (22) and an outlet secondary air (24), said secondary inlet and said secondary outlet being in fluid communication with the internal volume of the frame (12), a pipe (26) connecting said secondary inlet and said secondary outlet, extending at least in part outside ur of the frame (12), - at least one secondary cooling circuit (40), separated from the primary circuit (30), passing through the rotor (14) and in fluid communication with the secondary input and the secondary output of the device (20). ), a gaseous fluid internal to the secondary cooling circuit (40) being intended to circulate in said secondary cooling circuit and in said external cooling device, characterized in that the secondary cooling circuit (40) is traversed by a channel (36) of the primary cooling circuit (30) supplying the stator (16) with the gaseous fluid from outside the frame (12).
    [0002]
    2. Motor (10) according to claim 1, wherein the channel (36) passes through the secondary cooling circuit (40) transversely so as to separate the gas stream flowing in the secondary cooling circuit in two flows passing around the channel. (36).
    [0003]
    An engine (10) according to any one of claims 1 or 2, wherein the channel (36) passes through the secondary cooling circuit (40) primarily in a direction substantially parallel to an axis of rotation (X-X ' ) of a shaft (18) of the motor (10).
    [0004]
    4. Motor (10) according to any one of claims 1 to 3, wherein the channel (36) is arranged between the inlet (32) primary and a portion of the primary cooling circuit (30) passing through the stator ( 16). 3032568 9
    [0005]
    5. Motor (10) according to any one of claims 1 to 4, wherein the channel (36) has a conical section with an apex (38) upstream of the air flow and a base ( 39) downstream. 5
    [0006]
    6. Motor (10) according to any one of claims 1 to 5, wherein the channel (36) has a diameter between 10 and 50 mm.
    [0007]
    7. Motor (10) according to any one of claims 1 to 6, wherein several external cooling devices (20) to the frame (12) are arranged around the frame.
    [0008]
    The motor (10) according to any one of claims 1 to 7, wherein a radial fan (50) is mounted on the shaft (18) of the motor (10) to accelerate a gaseous flow in the circuit ( 40) secondary cooling.
    [0009]
    9. Motor (10) according to claim 1 to 8, wherein the fan (50) radial simultaneously accelerates a gas flow in the primary cooling circuit (30) and a gas flow in the circuit (40) of secondary cooling. 20
    [0010]
    The engine (10) according to any one of claims 1 to 9, wherein the pressure in the secondary cooling circuit (40) is greater than the pressure in the primary cooling circuit (30).
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    同族专利:
    公开号 | 公开日
    EP3054568A1|2016-08-10|
    JP2016146740A|2016-08-12|
    BR102016002632A2|2016-08-09|
    EP3054568B1|2021-04-21|
    CN105871123B|2019-11-12|
    CN105871123A|2016-08-17|
    US9768667B2|2017-09-19|
    JP6723020B2|2020-07-15|
    US20160233743A1|2016-08-11|
    FR3032568B1|2018-10-26|
    ES2877518T3|2021-11-17|
    引用文献:
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    EP0387743A1|1989-03-16|1990-09-19|Gec Alsthom Moteurs Sa|Enclosed air cooled electrical motor and its manufacturing method|
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    法律状态:
    2016-02-18| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-23| PLSC| Publication of the preliminary search report|Effective date: 20161223 |
    2017-02-17| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-02| CA| Change of address|Effective date: 20180103 |
    2018-02-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-02-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-24| PLFP| Fee payment|Year of fee payment: 7 |
    2022-02-16| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1550941A|FR3032568B1|2015-02-06|2015-02-06|ELECTRIC MOTOR WITH EXTERNAL RADIATOR AND TWO SEPARATE COOLING CIRCUITS|
    FR1550941|2015-02-06|FR1550941A| FR3032568B1|2015-02-06|2015-02-06|ELECTRIC MOTOR WITH EXTERNAL RADIATOR AND TWO SEPARATE COOLING CIRCUITS|
    JP2016019451A| JP6723020B2|2015-02-06|2016-02-04|Electric motor with external cooling device and two separate cooling circuits|
    BR102016002632A| BR102016002632A2|2015-02-06|2016-02-05|electric motor|
    EP16154564.5A| EP3054568B1|2015-02-06|2016-02-05|Electric motor with external radiator and two separate cooling circuits|
    ES16154564T| ES2877518T3|2015-02-06|2016-02-05|Electric motor with external radiator and two separate cooling circuits|
    US15/018,401| US9768667B2|2015-02-06|2016-02-08|Electric motor with outer radiator and two separate cooling circuits|
    CN201610086089.7A| CN105871123B|2015-02-06|2016-02-15|Motor with external heat sink and two cooling circuits separated|
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