WO2023108414A1 - Motor rotor and motor - Google Patents
Motor rotor and motor Download PDFInfo
- Publication number
- WO2023108414A1 WO2023108414A1 PCT/CN2021/137884 CN2021137884W WO2023108414A1 WO 2023108414 A1 WO2023108414 A1 WO 2023108414A1 CN 2021137884 W CN2021137884 W CN 2021137884W WO 2023108414 A1 WO2023108414 A1 WO 2023108414A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cooling
- rotor
- cooling channel
- hole
- motor rotor
- Prior art date
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- 238000001816 cooling Methods 0.000 claims abstract description 110
- 239000002826 coolant Substances 0.000 claims abstract description 42
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 description 11
- 238000003475 lamination Methods 0.000 description 7
- 230000004308 accommodation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Definitions
- the invention relates to the field of motors, in particular to a motor rotor and a motor.
- the motor can be used as the power device of pure electric vehicles or hybrid vehicles.
- the cooling oil as the cooling medium is pumped into the hollow rotor shaft through the pump, and the cooling oil passes through the oil hole on the rotor shaft. Outflow to the balance plate and stator windings to cool the motor.
- the cooling oil can directly contact the rotor shaft and the balance plate, but it is difficult for the cooling oil to contact the rotor body, and the heat of the rotor body can only be taken away indirectly through the rotor shaft and the balance plate, so the cooling effect is limited.
- the purpose of the present invention is to overcome or at least alleviate the shortcomings of the above-mentioned prior art, and to provide a motor rotor and a motor with better cooling effect.
- the invention provides a motor rotor, comprising:
- a rotor shaft provided with a central hole through which a cooling medium passes
- a rotor main body the rotor main body is connected to the rotor shaft in a torsion-resistant manner, a first cooling flow channel and a second cooling flow channel are formed inside the rotor main body, and the first cooling flow channel and the second cooling flow channel
- the flow passage extends along the axial direction of the motor rotor as a whole, and the upstream side of the first cooling flow passage and the upstream side of the second cooling flow passage communicate with the central hole,
- the upstream side of the first cooling channel and the downstream side of the second cooling channel are located on the same side in the axial direction of the motor rotor, and the downstream side of the first cooling channel is connected to the second cooling channel.
- the upstream sides of the two cooling channels are located on the same axial side of the motor rotor, so that the cooling medium flows in opposite directions in the first cooling channel and the second cooling channel.
- first cooling channels and the second cooling channels there are multiple first cooling channels and the second cooling channels, and the first cooling channel and the second cooling channel are arranged around the periphery of the motor rotor. Alternate settings up.
- the motor rotor further includes two balance disks, two balance disks are located at the two ends of the rotor body in the axial direction, and the first cooling channel and the second cooling channel is located between the two balance plates.
- the balance disc includes a first balance disc and a second balance disc
- the end surface of the first balance plate facing the rotor main body is provided with a first concave portion, and the first concave portion communicates with the upstream side of the first cooling channel,
- the end surface of the second balance plate facing the rotor main body is provided with a second concave portion, and the second concave portion communicates with the upstream side of the second cooling channel.
- the projected areas of the first recess and the second recess account for 30% to 80% of the balance disc.
- the rotor shaft is provided with a first hole and a second hole, the second hole is located downstream of the first hole in the flow direction of the cooling medium in the central hole side,
- the first hole communicates with the first cooling channel through the first depression, and the second hole communicates with the second cooling channel through the second depression.
- the first balance disk is provided with a first discharge hole
- the second balance disk is provided with a second discharge hole
- the first discharge hole is connected to the downstream side of the second cooling channel.
- the second discharge hole communicates with the downstream side of the first cooling channel.
- the first discharge hole is not connected to the first recess, and the second discharge hole is not connected to the second recess.
- the central hole is a blind hole.
- the present invention also proposes a motor, including a stator and the motor rotor described in any one of the above technical solutions.
- the cooling medium can pass through the rotor of the motor oppositely and alternately, thereby cooling the rotor of the motor.
- Fig. 1 shows a schematic structural diagram of a rotor of a motor according to an embodiment of the present invention.
- Fig. 2 shows a cross-sectional view of a rotor of an electric machine according to an embodiment of the present invention.
- Fig. 3 shows a schematic structural diagram of a rotor shaft of an electric motor according to an embodiment of the present invention.
- Fig. 4 shows a schematic structural diagram of a balance plate of a motor according to an embodiment of the present invention.
- Fig. 5 shows a schematic structural view of a rotor lamination of an electric machine according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram illustrating flow of a cooling medium in a rotor of an electric machine according to an embodiment of the present invention.
- the axial direction A represents the axial direction of the motor, which is consistent with the axial direction of the rotor 100 of the motor;
- the circumferential direction C represents the circumferential direction of the motor, and the circumferential direction C is consistent with the rotor 100 of the motor. 100 circumferentially consistent.
- the present invention provides a motor, which includes a stator and a rotor 100 , and the stator may be located radially outside of the rotor 100 .
- the stator includes stator windings, and the axial ends of the stator windings may partially protrude from the end surface of the balance disk 3 of the rotor 100 .
- the rotor 100 includes a rotor shaft 1, a rotor main body 2 and a balance disc 3.
- the rotor main body 2 may be cylindrical, and the balance disc 3 may be disc-shaped. Both the rotor main body 2 and the balance disc 3 are provided with a central hole, and the rotor shaft 1 passes through
- the rotor main body 2 and the balancing disk 3 are connected to the rotor shaft 1 in a rotationally fixed manner via the rotor main body 2 and the balancing disk 3 .
- Two balance discs 3 may be provided, and the rotor main body 2 is sandwiched between the two balance discs 3 .
- the rotor shaft 1 can be cylindrical with a central hole 12 , and a cooling medium can pass through the central hole 12 into the interior of the rotor shaft 1 .
- a partition 13 is arranged in the center hole 12 , the center hole 12 is a blind hole, and the partition 13 is the bottom surface of the center hole 12 .
- the rotor shaft 1 is provided with a first hole 11A and a second hole 11B penetrating through the cylinder wall, and both the first hole 11A and the second hole 11B communicate with the central hole 12 .
- the partition plate 13 is located on the axial side of the first hole 11A and the second hole 11B. Referring to FIG. 13 on the same side.
- the first hole 11A and the second hole 11B are separated by a certain distance in the axial direction A of the rotor shaft 1, and in the axial direction A of the rotor shaft 1, the positions of the first hole 11A and the second hole 11B are respectively the same as the two The positions of the balance discs 3 coincide.
- the second hole 11B may be located on the downstream side of the first hole 11A in the direction in which the cooling medium flows along the axial direction A of the center hole 12 .
- a plurality of first holes 11A and second holes 11B may be provided along the circumferential direction C of the rotor shaft 1 , so that the cooling medium flows out from the central hole 12 through the plurality of first holes 11A and second holes 11B.
- the balance plate 3 includes a first balance plate 301 and a second balance plate 302 , and the first balance plate 301 and the second balance plate 302 are respectively arranged at two axial ends of the rotor body 2 .
- the side of the first balance plate 301 facing the rotor main body 2 is provided with a first concave portion 31A.
- the first balance plate 301 is attached to the rotor main body 2 , and an accommodation chamber is formed between the first recessed portion 31A and the end surface of the rotor main body 2 , and the accommodation chamber is used for accommodating a cooling medium.
- the first balance plate 301 is provided with a first discharge hole 32B penetrating along its axial direction, and a plurality of first discharge holes 32B may be provided along the circumferential direction C of the first balance plate 301 .
- the first discharge hole 32B is located radially outside of the first recessed portion 31A, and the first discharge hole 32B and the first recessed portion 31A are separated, non-overlapping, and non-communicating.
- the cooling medium can be discharged from the rotor 100 through the first discharge hole 32B, and then can flow through the axial ends of the stator windings to cool the stator windings.
- the side of the second balance plate 302 facing the rotor main body 2 is provided with a second concave portion 31B.
- the second balance plate 302 is attached to the rotor main body 2 , and an accommodation cavity is formed between the second recessed portion 31B and the end surface of the rotor main body 2 , and the accommodation cavity is used for accommodating a cooling medium.
- the second balance plate 302 is provided with a second discharge hole 32A penetrating along its axial direction, and a plurality of second discharge holes 32A may be provided along the circumferential direction C of the second balance plate 302 .
- the second discharge hole 32A is located radially outside of the second recessed portion 31B, and the second discharge hole 32A and the second recessed portion 31B are separated, non-overlapping, and non-communicating.
- the cooling medium can be discharged from the rotor 100 through the second discharge hole 32A, and then can flow through the axial ends of the stator windings to cool the stator windings.
- the first recessed portion 31A can cover a large area of the end surface of the first balance plate 301, for example, along the axial projection of the first balance plate 301, the projected area of the first recessed portion 31A occupies 30% of the first balance plate. 30% to 80% of 301, so that the cooling medium has a better cooling effect on the balance disk 3.
- the first concave portion 31A may be in a closed ring shape, and the central hole of the first balance plate 301 is connected to the first concave portion 31A.
- the outline of the first recessed portion 31A may be approximately rectangular, and in order to avoid the first discharge hole 32B, the sides of the rectangular recess may be recessed.
- the cooling medium flowing in the first recessed portion 31A can cool the balance plate and the stator main body 2 .
- the first balance plate 301 and the second balance plate 302 have the same structure, but different installation positions and angles. Designing and processing one balance plate can be used as the first balance plate 301 and the second balance plate 302 at the same time, which can save production costs.
- the second recessed portion 31B and the second discharge hole 32A will not be described in detail.
- the rotor main body 2 may include several disk-shaped rotor laminations 21 , and the rotor laminations 21 are stacked together to form a cylindrical shape.
- the rotor laminations 21 are provided with through holes penetrating along the axial direction A thereof, and a plurality of rotor laminations 21 are stacked together so that the plurality of through holes communicate to form a cooling channel.
- the cooling channels include a first cooling channel 2A and a second cooling channel 2B, the first cooling channel 2A and the second cooling channel 2B are provided with multiple and the same number, for example, the first cooling channel 2A and the second cooling channel 2B Four cooling channels 2B are provided.
- the first cooling channels 2A and the second cooling channels 2B are arranged alternately in the circumferential direction C of the rotor main body 2, and the second cooling channels 2B are arranged between two adjacent first cooling channels 2A.
- a first cooling channel 2A is provided between adjacent second cooling channels 2B.
- the first cooling channel 2A and the second cooling channel 2B extend along the axial direction A as a whole.
- the through holes of adjacent rotor laminations 21 do not need to be completely aligned, and can also be staggered by a certain distance, as long as they can be partially opposed to form a through cooling channel.
- the upstream end of the first cooling channel 2A communicates with the central hole 12 through the first recess 31A, and the downstream end of the first cooling channel 2A communicates with the second discharge hole 32A.
- the upstream end of the second cooling channel 2B communicates with the central hole 12 through the second recess 31B, and the downstream end of the second cooling channel 2B communicates with the first discharge hole 32B.
- the rotor main body may be provided with a flow channel extending radially thereof, the first hole and the second hole may be aligned with the flow channel, so that the central hole communicates with the cooling flow channel in the rotor main body, and the cooling The medium flows radially outward in the rotor and then enters the first cooling channel and the second cooling channel.
- the upstream side of the first cooling channel 2A (the left side in FIG. 2 and FIG. 6 ) and the downstream side of the second cooling channel 2B are located on the same side in the axial direction A of the rotor body 2 (one side in the axial direction of the rotor body 2 ). end), the downstream side of the first cooling channel 2A (the right side of FIG. 2 and FIG. 6 ) and the upstream side of the second cooling channel 2B are located on the same side in the axial direction A of the rotor main body 2 (the rotor main body 2 The other end of the axial direction), so that the flow direction of the cooling medium in the first cooling channel 2A and the second cooling channel 2B is opposite.
- the cooling medium can effectively cool the motor rotor.
- the cooling medium flows into the cooling flow in the rotor main body from both axial ends of the rotor
- the channel flows out from the axial ends of the rotor and flows to the stator coils, etc. Therefore, in the present invention, the cooling of the axial ends of the rotor and stator coils is more consistent, and sufficient and effective cooling can be realized.
- the flow direction of the cooling medium in the rotor 100 is introduced.
- the passages or holes through which the cooling medium flows are represented materially.
- the arrows in Fig. 2 and Fig. 6 indicate the flow direction of the cooling medium, and the cooling medium may be oil.
- the cooling medium flows along the axial direction of the central hole 12 under the action of the pump, and is divided into two branches through the first hole 11A and the second hole 11B.
- the cooling medium passing through the first hole 11A enters the first concave portion 31A, and the cooling medium in the first concave portion 31A can cool the first balance plate 301 .
- the cooling medium enters the rotor main body 2 along the first cooling flow channel 2A to cool the rotor main body 2, and finally the cooling medium is discharged from the second discharge hole 32A, and the discharged cooling medium can flow to the end of the stator winding to cool the stator winding. cool down.
- the cooling medium passing through the second hole 11B enters the second concave portion 31B, and the cooling medium in the second concave portion 31B can cool the second balance disk 302 . Then the cooling medium enters the rotor main body 2 along the second cooling channel 2B to cool the rotor main body 2 .
- the flow direction of the cooling medium in the second cooling channel 2B is opposite to that of the cooling medium in the first cooling channel 2A. Finally, the cooling medium is discharged from the first discharge hole 32B, and the discharged cooling medium can flow to the end of the stator winding to cool the stator winding.
- balance plate 301 first balance plate 31A first depression 32B first discharge hole 302 second balance plate 31B second depression 32A second discharge hole
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
A motor rotor and a motor. The motor rotor comprises: a rotor shaft (1) provided with a central hole (12) for passage of a cooling medium; and a rotor main body (2) in torsion-resistant connection with the rotor shaft (1), a first cooling flow channel (2A) and a second cooling flow channel (2B) being formed inside the rotor main body (2), and the first cooling flow channel (2A) and the second cooling flow channel (2B) substantially extending in an axial direction (A) of the motor rotor. The upstream side of the first cooling flow channel (2A) and the downstream side of the second cooling flow channel (2B) are on the same side in the axial direction (A) of the motor rotor, while the downstream side of the first cooling flow channel (2A) and the upstream side of the second cooling flow channel (2B) are also on the same side in the axial direction (A) of the motor rotor. This arrangement allows flowing directions of the cooling medium in the first cooling flow channel (2A) and in the second cooling flow channel (2B) to be opposite to each other.
Description
本发明涉及电机领域,特别地涉及一种电机转子和电机。The invention relates to the field of motors, in particular to a motor rotor and a motor.
电机可以作为纯电动汽车或混合动力汽车的动力装置,在一种可能的电机的冷却方式中,通过泵将作为冷却介质的冷却油泵入空心的转子轴中,冷却油通过转子轴上的油孔流出到平衡板和定子绕组上,从而对电机进行冷却。在这种冷却方式中,冷却油可以与转子轴、平衡盘直接接触,但是冷却油难以接触到转子主体,只能通过转子轴和平衡盘间接带走转子主体的热量,因此冷却效果受到限制。The motor can be used as the power device of pure electric vehicles or hybrid vehicles. In one possible cooling method of the motor, the cooling oil as the cooling medium is pumped into the hollow rotor shaft through the pump, and the cooling oil passes through the oil hole on the rotor shaft. Outflow to the balance plate and stator windings to cool the motor. In this cooling method, the cooling oil can directly contact the rotor shaft and the balance plate, but it is difficult for the cooling oil to contact the rotor body, and the heat of the rotor body can only be taken away indirectly through the rotor shaft and the balance plate, so the cooling effect is limited.
发明内容Contents of the invention
本发明的目的在于克服或至少减轻上述现有技术存在的不足,提供一种冷却效果较好的电机转子和电机。The purpose of the present invention is to overcome or at least alleviate the shortcomings of the above-mentioned prior art, and to provide a motor rotor and a motor with better cooling effect.
本发明提供一种电机转子,包括:The invention provides a motor rotor, comprising:
转子轴,所述转子轴设置有供冷却介质通过的中心孔;以及a rotor shaft provided with a central hole through which a cooling medium passes; and
转子主体,所述转子主体抗扭地连接于所述转子轴,所述转子主体的内部形成有第一冷却流道和第二冷却流道,所述第一冷却流道和所述第二冷却流道整体上沿所述电机转子的轴向延伸,所述第一冷却流道的上游侧和所述第二冷却流道的上游侧均与所述中心孔连通,A rotor main body, the rotor main body is connected to the rotor shaft in a torsion-resistant manner, a first cooling flow channel and a second cooling flow channel are formed inside the rotor main body, and the first cooling flow channel and the second cooling flow channel The flow passage extends along the axial direction of the motor rotor as a whole, and the upstream side of the first cooling flow passage and the upstream side of the second cooling flow passage communicate with the central hole,
其中,所述第一冷却流道的上游侧与所述第二冷却流道的下游侧位于所述电机转子的轴向上的同一侧,所述第一冷却流道的下游侧与所述第二冷却流道的上游侧位于所述电机转子的轴向上的同一侧,使得所述冷却介质在所 述第一冷却流道和所述第二冷却流道中的流动方向相反。Wherein, the upstream side of the first cooling channel and the downstream side of the second cooling channel are located on the same side in the axial direction of the motor rotor, and the downstream side of the first cooling channel is connected to the second cooling channel. The upstream sides of the two cooling channels are located on the same axial side of the motor rotor, so that the cooling medium flows in opposite directions in the first cooling channel and the second cooling channel.
在至少一个实施方式中,所述第一冷却流道和所述第二冷却流道均设置有多条,所述第一冷却流道和所述第二冷却流道在所述电机转子的周向上交替设置。In at least one embodiment, there are multiple first cooling channels and the second cooling channels, and the first cooling channel and the second cooling channel are arranged around the periphery of the motor rotor. Alternate settings up.
在至少一个实施方式中,所述电机转子还包括平衡盘,所述平衡盘设置有两个,两个所述平衡盘分别位于所述转子主体的轴向两端,所述第一冷却流道和所述第二冷却流道位于两个所述平衡盘之间。In at least one embodiment, the motor rotor further includes two balance disks, two balance disks are located at the two ends of the rotor body in the axial direction, and the first cooling channel and the second cooling channel is located between the two balance plates.
在至少一个实施方式中,所述平衡盘包括第一平衡盘和第二平衡盘,In at least one embodiment, the balance disc includes a first balance disc and a second balance disc,
所述第一平衡盘的朝向所述转子主体的端面设置有第一凹陷部,所述第一凹陷部和所述第一冷却流道的上游侧连通,The end surface of the first balance plate facing the rotor main body is provided with a first concave portion, and the first concave portion communicates with the upstream side of the first cooling channel,
所述第二平衡盘的朝向所述转子主体的端面设置有第二凹陷部,所述第二凹陷部和所述第二冷却流道的上游侧连通。The end surface of the second balance plate facing the rotor main body is provided with a second concave portion, and the second concave portion communicates with the upstream side of the second cooling channel.
在至少一个实施方式中,沿所述平衡盘的轴向投影,所述第一凹陷部和所述第二凹陷部的投影面积占所述平衡盘的30%至80%。In at least one embodiment, projected along the axial direction of the balance disc, the projected areas of the first recess and the second recess account for 30% to 80% of the balance disc.
在至少一个实施方式中,所述转子轴设置有第一孔和第二孔,在所述冷却介质在所述中心孔中的流动方向上,所述第二孔位于所述第一孔的下游侧,In at least one embodiment, the rotor shaft is provided with a first hole and a second hole, the second hole is located downstream of the first hole in the flow direction of the cooling medium in the central hole side,
所述第一孔通过所述第一凹陷部和所述第一冷却流道连通,所述第二孔通过所述第二凹陷部和所述第二冷却流道连通。The first hole communicates with the first cooling channel through the first depression, and the second hole communicates with the second cooling channel through the second depression.
在至少一个实施方式中,所述第一平衡盘设置有第一排出孔,所述第二平衡盘设置有第二排出孔,所述第一排出孔与所述第二冷却流道的下游侧连通,所述第二排出孔与所述第一冷却流道的下游侧连通。In at least one embodiment, the first balance disk is provided with a first discharge hole, the second balance disk is provided with a second discharge hole, and the first discharge hole is connected to the downstream side of the second cooling channel. The second discharge hole communicates with the downstream side of the first cooling channel.
在至少一个实施方式中,所述第一排出孔与所述第一凹陷部不连通,所述第二排出孔与所述第二凹陷部不连通。In at least one embodiment, the first discharge hole is not connected to the first recess, and the second discharge hole is not connected to the second recess.
在至少一个实施方式中,所述中心孔为盲孔。In at least one embodiment, the central hole is a blind hole.
本发明还提出一种电机,包括定子和上述技术方案中任一项所述的电机转子。The present invention also proposes a motor, including a stator and the motor rotor described in any one of the above technical solutions.
通过采用上述技术方案,可以使冷却介质对向、交替地穿过电机转子,从而对电机转子冷却降温。By adopting the above technical solution, the cooling medium can pass through the rotor of the motor oppositely and alternately, thereby cooling the rotor of the motor.
图1示出了根据本发明的实施方式的电机的转子的结构示意图。Fig. 1 shows a schematic structural diagram of a rotor of a motor according to an embodiment of the present invention.
图2示出了根据本发明的实施方式的电机的转子的剖视图。Fig. 2 shows a cross-sectional view of a rotor of an electric machine according to an embodiment of the present invention.
图3示出了根据本发明的实施方式的电机的转子轴的结构示意图。Fig. 3 shows a schematic structural diagram of a rotor shaft of an electric motor according to an embodiment of the present invention.
图4示出了根据本发明的实施方式的电机的平衡盘的结构示意图。Fig. 4 shows a schematic structural diagram of a balance plate of a motor according to an embodiment of the present invention.
图5示出了根据本发明的实施方式的电机的转子叠片的结构示意图。Fig. 5 shows a schematic structural view of a rotor lamination of an electric machine according to an embodiment of the present invention.
图6是示出了根据本发明的实施方式的电机的转子中的冷却介质流动的示意图。FIG. 6 is a schematic diagram illustrating flow of a cooling medium in a rotor of an electric machine according to an embodiment of the present invention.
下面参照附图描述本发明的示例性实施方式。Exemplary embodiments of the present invention are described below with reference to the accompanying drawings.
在下面的描述中,除非单独说明,轴向A表示电机的轴向,该轴向A与电机的转子100的轴向一致;周向C表示电机的周向,该周向C与电机的转子100的周向一致。In the following description, unless otherwise stated, the axial direction A represents the axial direction of the motor, which is consistent with the axial direction of the rotor 100 of the motor; the circumferential direction C represents the circumferential direction of the motor, and the circumferential direction C is consistent with the rotor 100 of the motor. 100 circumferentially consistent.
参照图1至图6,本发明提供一种电机,该电机包括定子和转子100,定子可以位于转子100的径向外侧。定子包括定子绕组,定子绕组的轴向两端可以部分凸出于转子100的平衡盘3的端面。Referring to FIGS. 1 to 6 , the present invention provides a motor, which includes a stator and a rotor 100 , and the stator may be located radially outside of the rotor 100 . The stator includes stator windings, and the axial ends of the stator windings may partially protrude from the end surface of the balance disk 3 of the rotor 100 .
转子100包括转子轴1、转子主体2和平衡盘3,转子主体2可以为圆筒状,平衡盘3可以为圆盘状,转子主体2和平衡盘3均设置有中心孔,转子轴1穿过 转子主体2和平衡盘3并且转子主体2和平衡盘3抗扭地连接于转子轴1。The rotor 100 includes a rotor shaft 1, a rotor main body 2 and a balance disc 3. The rotor main body 2 may be cylindrical, and the balance disc 3 may be disc-shaped. Both the rotor main body 2 and the balance disc 3 are provided with a central hole, and the rotor shaft 1 passes through The rotor main body 2 and the balancing disk 3 are connected to the rotor shaft 1 in a rotationally fixed manner via the rotor main body 2 and the balancing disk 3 .
平衡盘3可以设置有两个,转子主体2被夹在两个平衡盘3之间。Two balance discs 3 may be provided, and the rotor main body 2 is sandwiched between the two balance discs 3 .
如图1至图3所示,转子轴1可以为具有中心孔12的圆筒状,冷却介质可以从中心孔12通入转子轴1的内部。中心孔12中设置有隔板13,中心孔12为盲孔,隔板13为中心孔12的底面。As shown in FIGS. 1 to 3 , the rotor shaft 1 can be cylindrical with a central hole 12 , and a cooling medium can pass through the central hole 12 into the interior of the rotor shaft 1 . A partition 13 is arranged in the center hole 12 , the center hole 12 is a blind hole, and the partition 13 is the bottom surface of the center hole 12 .
转子轴1设置有贯穿筒壁的第一孔11A和第二孔11B,第一孔11A和第二孔11B均与中心孔12连通。隔板13位于第一孔11A和第二孔11B的轴向一侧,参照图2,为中心孔12中冷却介质的流动方向上的下游侧,第一孔11A和第二孔11B位于隔板13的同一侧。第一孔11A和第二孔11B在转子轴1的轴向A上间隔开一定距离,在转子轴1的轴向A上,第一孔11A的位置和第二孔11B的位置分别与两个平衡盘3的位置重合。在冷却介质沿中心孔12的轴向A流动的方向上,第二孔11B可以位于第一孔11A的下游侧。The rotor shaft 1 is provided with a first hole 11A and a second hole 11B penetrating through the cylinder wall, and both the first hole 11A and the second hole 11B communicate with the central hole 12 . The partition plate 13 is located on the axial side of the first hole 11A and the second hole 11B. Referring to FIG. 13 on the same side. The first hole 11A and the second hole 11B are separated by a certain distance in the axial direction A of the rotor shaft 1, and in the axial direction A of the rotor shaft 1, the positions of the first hole 11A and the second hole 11B are respectively the same as the two The positions of the balance discs 3 coincide. The second hole 11B may be located on the downstream side of the first hole 11A in the direction in which the cooling medium flows along the axial direction A of the center hole 12 .
第一孔11A和第二孔11B均可以沿转子轴1的周向C设置多个,从而使冷却介质通过多个第一孔11A和第二孔11B从中心孔12流出。A plurality of first holes 11A and second holes 11B may be provided along the circumferential direction C of the rotor shaft 1 , so that the cooling medium flows out from the central hole 12 through the plurality of first holes 11A and second holes 11B.
如图1和图2所示,平衡盘3包括第一平衡盘301和第二平衡盘302,第一平衡盘301和第二平衡盘302分别设置于转子主体2的轴向两端。As shown in FIG. 1 and FIG. 2 , the balance plate 3 includes a first balance plate 301 and a second balance plate 302 , and the first balance plate 301 and the second balance plate 302 are respectively arranged at two axial ends of the rotor body 2 .
如图2和图4所示,第一平衡盘301的朝向转子主体2的侧面设置有第一凹陷部31A。第一平衡盘301贴抵于转子主体2,第一凹陷部31A和转子主体2的端面之间形成容纳腔,容纳腔用于容纳冷却介质。As shown in FIG. 2 and FIG. 4 , the side of the first balance plate 301 facing the rotor main body 2 is provided with a first concave portion 31A. The first balance plate 301 is attached to the rotor main body 2 , and an accommodation chamber is formed between the first recessed portion 31A and the end surface of the rotor main body 2 , and the accommodation chamber is used for accommodating a cooling medium.
第一平衡盘301设置有沿其轴向贯穿的第一排出孔32B,第一排出孔32B可以沿第一平衡盘301的周向C设置多个。第一排出孔32B位于第一凹陷部31A的径向外侧,第一排出孔32B和第一凹陷部31A分隔开、不重叠且不连通。冷却介质可以从第一排出孔32B排出转子100,然后可以流过定子绕组的轴向端部,对定子绕组进行冷却。The first balance plate 301 is provided with a first discharge hole 32B penetrating along its axial direction, and a plurality of first discharge holes 32B may be provided along the circumferential direction C of the first balance plate 301 . The first discharge hole 32B is located radially outside of the first recessed portion 31A, and the first discharge hole 32B and the first recessed portion 31A are separated, non-overlapping, and non-communicating. The cooling medium can be discharged from the rotor 100 through the first discharge hole 32B, and then can flow through the axial ends of the stator windings to cool the stator windings.
第二平衡盘302的朝向转子主体2的侧面设置有第二凹陷部31B。第二平衡盘302贴抵于转子主体2,第二凹陷部31B和转子主体2的端面之间形成容纳腔,容纳腔用于容纳冷却介质。The side of the second balance plate 302 facing the rotor main body 2 is provided with a second concave portion 31B. The second balance plate 302 is attached to the rotor main body 2 , and an accommodation cavity is formed between the second recessed portion 31B and the end surface of the rotor main body 2 , and the accommodation cavity is used for accommodating a cooling medium.
第二平衡盘302设置有沿其轴向贯穿的第二排出孔32A,第二排出孔32A可以沿第二平衡盘302的周向C设置多个。第二排出孔32A位于第二凹陷部31B的径向外侧,第二排出孔32A和第二凹陷部31B分隔开、不重叠且不连通。冷却介质可以从第二排出孔32A排出转子100,然后可以流过定子绕组的轴向端部,对定子绕组进行冷却。The second balance plate 302 is provided with a second discharge hole 32A penetrating along its axial direction, and a plurality of second discharge holes 32A may be provided along the circumferential direction C of the second balance plate 302 . The second discharge hole 32A is located radially outside of the second recessed portion 31B, and the second discharge hole 32A and the second recessed portion 31B are separated, non-overlapping, and non-communicating. The cooling medium can be discharged from the rotor 100 through the second discharge hole 32A, and then can flow through the axial ends of the stator windings to cool the stator windings.
如图4所示,第一凹陷部31A可以覆盖第一平衡盘301的端面的较大区域,例如沿第一平衡盘301的轴向投影,第一凹陷部31A的投影面积占第一平衡盘301的30%至80%,使冷却介质对平衡盘3具有较好的冷却效果。第一凹陷部31A可以为闭合的环状,第一平衡盘301的中心孔连接到第一凹陷部31A。例如第一凹陷部31A轮廓可以近似为矩形,为了避让第一排出孔32B,矩形凹陷的侧边可以内凹。冷却介质在第一凹陷部31A流动可以对平衡盘和定子主体2进行冷却降温。第一平衡盘301和第二平衡盘302的结构相同,安装位置、角度不同,设计加工一种平衡盘即可同时用作第一平衡盘301和第二平衡盘302,可以节约生产成本。对于第二凹陷部31B、第二排出孔32A不再具体介绍。As shown in Figure 4, the first recessed portion 31A can cover a large area of the end surface of the first balance plate 301, for example, along the axial projection of the first balance plate 301, the projected area of the first recessed portion 31A occupies 30% of the first balance plate. 30% to 80% of 301, so that the cooling medium has a better cooling effect on the balance disk 3. The first concave portion 31A may be in a closed ring shape, and the central hole of the first balance plate 301 is connected to the first concave portion 31A. For example, the outline of the first recessed portion 31A may be approximately rectangular, and in order to avoid the first discharge hole 32B, the sides of the rectangular recess may be recessed. The cooling medium flowing in the first recessed portion 31A can cool the balance plate and the stator main body 2 . The first balance plate 301 and the second balance plate 302 have the same structure, but different installation positions and angles. Designing and processing one balance plate can be used as the first balance plate 301 and the second balance plate 302 at the same time, which can save production costs. The second recessed portion 31B and the second discharge hole 32A will not be described in detail.
如图2和图5所示,转子主体2可以包括若干盘状的转子叠片21,转子叠片21层叠在一起形成筒状。转子叠片21设置有沿其轴向A贯穿的通孔,多个转子叠片21层叠在一起使多个通孔连通而形成冷却流道。冷却流道包括第一冷却流道2A和第二冷却流道2B,第一冷却流道2A和第二冷却流道2B均设置有多个并且数量相同,例如第一冷却流道2A和第二冷却流道2B各设置有4个。第一冷却流道2A和第二冷却流道2B在转子主体2的周向C上交替设置, 两个相邻的第一冷却流道2A之间设置有第二冷却流道2B,两个相邻的第二冷却流道2B之间设置有第一冷却流道2A。第一冷却流道2A和第二冷却流道2B整体上沿轴向A延伸。As shown in FIG. 2 and FIG. 5 , the rotor main body 2 may include several disk-shaped rotor laminations 21 , and the rotor laminations 21 are stacked together to form a cylindrical shape. The rotor laminations 21 are provided with through holes penetrating along the axial direction A thereof, and a plurality of rotor laminations 21 are stacked together so that the plurality of through holes communicate to form a cooling channel. The cooling channels include a first cooling channel 2A and a second cooling channel 2B, the first cooling channel 2A and the second cooling channel 2B are provided with multiple and the same number, for example, the first cooling channel 2A and the second cooling channel 2B Four cooling channels 2B are provided. The first cooling channels 2A and the second cooling channels 2B are arranged alternately in the circumferential direction C of the rotor main body 2, and the second cooling channels 2B are arranged between two adjacent first cooling channels 2A. A first cooling channel 2A is provided between adjacent second cooling channels 2B. The first cooling channel 2A and the second cooling channel 2B extend along the axial direction A as a whole.
可以理解,相邻的转子叠片21的通孔无需完全对齐,也可以错开一定的距离,只要能够部分相对形成贯通的冷却流道即可。It can be understood that the through holes of adjacent rotor laminations 21 do not need to be completely aligned, and can also be staggered by a certain distance, as long as they can be partially opposed to form a through cooling channel.
第一冷却流道2A的上游端通过第一凹陷部31A和中心孔12连通,第一冷却流道2A的下游端和第二排出孔32A连通。第二冷却流道2B的上游端通过第二凹陷部31B和中心孔12连通,第二冷却流道2B的下游端和第一排出孔32B连通。The upstream end of the first cooling channel 2A communicates with the central hole 12 through the first recess 31A, and the downstream end of the first cooling channel 2A communicates with the second discharge hole 32A. The upstream end of the second cooling channel 2B communicates with the central hole 12 through the second recess 31B, and the downstream end of the second cooling channel 2B communicates with the first discharge hole 32B.
在其他可能的实施方式中,转子主体可以设置有沿其径向延伸的流道,第一孔和第二孔可以对准该流道,使中心孔与转子主体内的冷却流道连通,冷却介质在转子中向径向外侧流动后进入第一冷却流道和第二冷却流道。In other possible implementations, the rotor main body may be provided with a flow channel extending radially thereof, the first hole and the second hole may be aligned with the flow channel, so that the central hole communicates with the cooling flow channel in the rotor main body, and the cooling The medium flows radially outward in the rotor and then enters the first cooling channel and the second cooling channel.
第一冷却流道2A的上游侧(图2、图6的左侧)与第二冷却流道2B的下游侧位于转子主体2的轴向A上的同一侧(转子主体2的轴向一侧端部),第一冷却流道2A的下游侧(图2、图6的右侧)与第二冷却流道2B的上游侧位于转子主体2的轴向A上的同一侧(转子主体2的轴向另一侧端部),从而冷却介质在第一冷却流道2A和第二冷却流道2B中的流动方向相反。通过使冷却介质对向、交替地穿过电机转子,使冷却介质有效地对电机转子进行冷却降温。The upstream side of the first cooling channel 2A (the left side in FIG. 2 and FIG. 6 ) and the downstream side of the second cooling channel 2B are located on the same side in the axial direction A of the rotor body 2 (one side in the axial direction of the rotor body 2 ). end), the downstream side of the first cooling channel 2A (the right side of FIG. 2 and FIG. 6 ) and the upstream side of the second cooling channel 2B are located on the same side in the axial direction A of the rotor main body 2 (the rotor main body 2 The other end of the axial direction), so that the flow direction of the cooling medium in the first cooling channel 2A and the second cooling channel 2B is opposite. By passing the cooling medium oppositely and alternately through the motor rotor, the cooling medium can effectively cool the motor rotor.
更具体地,与冷却介质从转子的轴向一侧进入转子,从转子的轴向另一侧流出转子相比,本发明中,冷却介质从转子的轴向两端流入转子主体内的冷却流道,从转子的轴向两端流出并流到定子线圈等。因此,在本发明中,对转子和定子线圈等的轴向两端的冷却更趋一致,可以实现充分、有效的冷却。More specifically, compared with the cooling medium entering the rotor from one axial side of the rotor and flowing out of the rotor from the other axial side of the rotor, in the present invention, the cooling medium flows into the cooling flow in the rotor main body from both axial ends of the rotor The channel flows out from the axial ends of the rotor and flows to the stator coils, etc. Therefore, in the present invention, the cooling of the axial ends of the rotor and stator coils is more consistent, and sufficient and effective cooling can be realized.
参照图2和图6,介绍冷却介质在转子100中的流动方向。图6中将流过冷 却介质的通道或孔实体化表示。图2和图6中的箭头表示冷却介质的流动方向,冷却介质可以为油液。Referring to FIG. 2 and FIG. 6 , the flow direction of the cooling medium in the rotor 100 is introduced. In Fig. 6, the passages or holes through which the cooling medium flows are represented materially. The arrows in Fig. 2 and Fig. 6 indicate the flow direction of the cooling medium, and the cooling medium may be oil.
冷却介质在泵作用下沿中心孔12的轴向流动,通过第一孔11A和第二孔11B分流为两条支路。通过第一孔11A的冷却介质进入第一凹陷部31A,第一凹陷部31A的冷却介质可以对第一平衡盘301进行冷却。然后冷却介质沿第一冷却流道2A进入转子主体2,对转子主体2进行冷却,最后冷却介质从第二排出孔32A排出,排出的冷却介质可以流到定子绕组的端部,对定子绕组进行冷却。The cooling medium flows along the axial direction of the central hole 12 under the action of the pump, and is divided into two branches through the first hole 11A and the second hole 11B. The cooling medium passing through the first hole 11A enters the first concave portion 31A, and the cooling medium in the first concave portion 31A can cool the first balance plate 301 . Then the cooling medium enters the rotor main body 2 along the first cooling flow channel 2A to cool the rotor main body 2, and finally the cooling medium is discharged from the second discharge hole 32A, and the discharged cooling medium can flow to the end of the stator winding to cool the stator winding. cool down.
通过第二孔11B的冷却介质进入第二凹陷部31B,第二凹陷部31B的冷却介质可以对第二平衡盘302进行冷却。然后冷却介质沿第二冷却流道2B进入转子主体2,对转子主体2进行冷却。冷却介质在第二冷却流道2B中的流动方向与冷却介质在第一冷却流道2A中的流动方向相反。最后冷却介质从第一排出孔32B排出,排出的冷却介质可以流到定子绕组的端部,对定子绕组进行冷却。The cooling medium passing through the second hole 11B enters the second concave portion 31B, and the cooling medium in the second concave portion 31B can cool the second balance disk 302 . Then the cooling medium enters the rotor main body 2 along the second cooling channel 2B to cool the rotor main body 2 . The flow direction of the cooling medium in the second cooling channel 2B is opposite to that of the cooling medium in the first cooling channel 2A. Finally, the cooling medium is discharged from the first discharge hole 32B, and the discharged cooling medium can flow to the end of the stator winding to cool the stator winding.
虽使用上述实施方式对本发明进行了详细说明,但对于本领域技术人员来说,本发明显然并不限于在本说明书中说明的实施方式。本发明能够在不脱离由权利要求书所确定的本发明的主旨以及范围的前提下加以修改并作为变更实施方式加以实施。因此,本说明书中的记载以示例说明为目的,对于本发明并不具有任何限制性的含义。Although the present invention has been described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be modified and implemented as modified embodiments without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning to the present invention.
附图标记列表List of reference signs
100转子100 rotor
1转子轴 11A第一孔 11B第二孔 12中心孔 13隔板1 rotor shaft 11A first hole 11B second hole 12 central hole 13 partition
2转子叠片 2A第一冷却流道 2B第二冷却流道2 rotor laminations 2A first cooling channel 2B second cooling channel
3平衡盘 301第一平衡盘 31A第一凹陷部 32B第一排出孔 302第二平衡盘 31B第二凹陷部 32A第二排出孔3 balance plate 301 first balance plate 31A first depression 32B first discharge hole 302 second balance plate 31B second depression 32A second discharge hole
A轴向 C周向A Axial C Circumferential
Claims (10)
- 一种电机转子,其特征在于,包括:A motor rotor, characterized in that it comprises:转子轴(1),所述转子轴(1)设置有供冷却介质通过的中心孔(12);以及a rotor shaft (1) provided with a central hole (12) through which a cooling medium passes; and转子主体(2),所述转子主体(2)抗扭地连接于所述转子轴(1),所述转子主体(2)的内部形成有第一冷却流道(2A)和第二冷却流道(2B),所述第一冷却流道(2A)和所述第二冷却流道(2B)整体上沿所述电机转子的轴向(A)延伸,所述第一冷却流道(2A)的上游侧和所述第二冷却流道(2B)的上游侧均与所述中心孔(12)连通,The rotor main body (2), the rotor main body (2) is connected to the rotor shaft (1) in a torsion-resistant manner, and the inside of the rotor main body (2) is formed with a first cooling channel (2A) and a second cooling flow channel channel (2B), the first cooling channel (2A) and the second cooling channel (2B) extend along the axial direction (A) of the motor rotor as a whole, and the first cooling channel (2A ) and the upstream side of the second cooling channel (2B) are in communication with the center hole (12),其中,所述第一冷却流道(2A)的上游侧与所述第二冷却流道(2B)的下游侧位于所述电机转子(2)的轴向(A)上的同一侧,所述第一冷却流道(2A)的下游侧与所述第二冷却流道(2B)的上游侧位于所述电机转子(2)的轴向(A)上的同一侧,使得所述冷却介质在所述第一冷却流道(2A)和所述第二冷却流道(2B)中的流动方向相反。Wherein, the upstream side of the first cooling channel (2A) and the downstream side of the second cooling channel (2B) are located on the same side in the axial direction (A) of the motor rotor (2), the The downstream side of the first cooling channel (2A) and the upstream side of the second cooling channel (2B) are located on the same side in the axial direction (A) of the motor rotor (2), so that the cooling medium is Flow directions in the first cooling channel (2A) and in the second cooling channel (2B) are opposite.
- 根据权利要求1所述的电机转子,其特征在于,所述第一冷却流道(2A)和所述第二冷却流道(2B)均设置有多条,所述第一冷却流道(2A)和所述第二冷却流道(2B)在所述电机转子的周向(C)上交替设置。The motor rotor according to claim 1, characterized in that there are multiple first cooling channels (2A) and second cooling channels (2B), and the first cooling channels (2A ) and the second cooling channels (2B) are arranged alternately in the circumferential direction (C) of the motor rotor.
- 根据权利要求1所述的电机转子,其特征在于,所述电机转子还包括平衡盘(3),所述平衡盘(3)设置有两个,两个所述平衡盘(3)分别位于所述转子主体(2)的轴向两端,所述第一冷却流道(2A)和所述第二冷却流道(2B)位于两个所述平衡盘(3)之间。The motor rotor according to claim 1, characterized in that, the motor rotor also includes a balance disc (3), and two balance discs (3) are provided, and the two balance discs (3) are respectively located at the The two axial ends of the rotor main body (2), the first cooling channel (2A) and the second cooling channel (2B) are located between the two balance plates (3).
- 根据权利要求3所述的电机转子,其特征在于,所述平衡盘(3)包括第一平衡盘(301)和第二平衡盘(302),The motor rotor according to claim 3, characterized in that, the balance disc (3) comprises a first balance disc (301) and a second balance disc (302),所述第一平衡盘(301)的朝向所述转子主体(2)的端面设置有第一凹陷部(31A),所述第一凹陷部(31A)和所述第一冷却流道(2A)的上游侧 连通,The end surface of the first balance plate (301) facing the rotor main body (2) is provided with a first concave portion (31A), and the first concave portion (31A) and the first cooling channel (2A) The upstream side of the connection,所述第二平衡盘(302)的朝向所述转子主体(2)的端面设置有第二凹陷部(31B),所述第二凹陷部(31B)和所述第二冷却流道(2B)的上游侧连通。The end surface of the second balance plate (302) facing the rotor main body (2) is provided with a second recessed part (31B), and the second recessed part (31B) and the second cooling channel (2B) connected to the upstream side.
- 根据权利要求4所述的电机转子,其特征在于,沿所述平衡盘(3)的轴向投影,所述第一凹陷部(31A)和所述第二凹陷部(31B)的投影面积占所述平衡盘(3)的30%至80%。The motor rotor according to claim 4, characterized in that, along the axial projection of the balance plate (3), the projected area of the first recess (31A) and the second recess (31B) occupies 30% to 80% of the balance disc (3).
- 根据权利要求4所述的电机转子,其特征在于,所述转子轴(1)设置有第一孔(11A)和第二孔(11B),在所述冷却介质在所述中心孔(12)中的流动方向上,所述第二孔(11B)位于所述第一孔(11A)的下游侧,The motor rotor according to claim 4, characterized in that, the rotor shaft (1) is provided with a first hole (11A) and a second hole (11B), and the cooling medium passes through the central hole (12) In the direction of flow, the second hole (11B) is located on the downstream side of the first hole (11A),所述第一孔(11A)通过所述第一凹陷部(31A)和所述第一冷却流道(2A)连通,所述第二孔(11B)通过所述第二凹陷部(31B)和所述第二冷却流道(2B)连通。The first hole (11A) communicates with the first cooling channel (2A) through the first depression (31A), and the second hole (11B) communicates with the second depression (31B) and The second cooling channel (2B) is connected.
- 根据权利要求4所述的电机转子,其特征在于,所述第一平衡盘(301)设置有第一排出孔(32B),所述第二平衡盘(302)设置有第二排出孔(32A),所述第一排出孔(32B)与所述第二冷却流道(2B)的下游侧连通,所述第二排出孔(32A)与所述第一冷却流道(2A)的下游侧连通。The motor rotor according to claim 4, characterized in that, the first balance disk (301) is provided with a first discharge hole (32B), and the second balance disk (302) is provided with a second discharge hole (32A) ), the first discharge hole (32B) communicates with the downstream side of the second cooling channel (2B), and the second discharge hole (32A) communicates with the downstream side of the first cooling channel (2A) connected.
- 根据权利要求7所述的电机转子,其特征在于,所述第一排出孔(32B)与所述第一凹陷部(31A)不连通,所述第二排出孔(32A)与所述第二凹陷部(31B)不连通。The motor rotor according to claim 7, characterized in that, the first discharge hole (32B) does not communicate with the first recess (31A), and the second discharge hole (32A) communicates with the second The depression (31B) is not connected.
- 根据权利要求1所述的电机转子,其特征在于,所述中心孔(12)为盲孔。The motor rotor according to claim 1, characterized in that, the central hole (12) is a blind hole.
- 一种电机,其特征在于,包括定子和权利要求1至9中任一项所述的电机转子。A motor, characterized by comprising a stator and the motor rotor according to any one of claims 1-9.
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PCT/CN2021/137884 WO2023108414A1 (en) | 2021-12-14 | 2021-12-14 | Motor rotor and motor |
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PCT/CN2021/137884 WO2023108414A1 (en) | 2021-12-14 | 2021-12-14 | Motor rotor and motor |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5889342A (en) * | 1995-12-21 | 1999-03-30 | Aisin Aw Co., Ltd. | Motor cooling circuit |
CN207098801U (en) * | 2017-05-22 | 2018-03-13 | 比亚迪股份有限公司 | A kind of motor with cooling oil path |
WO2021176309A1 (en) * | 2020-03-02 | 2021-09-10 | Nidec Corporation | Rotor arrangement having a liquid-cooled rotor |
-
2021
- 2021-12-14 WO PCT/CN2021/137884 patent/WO2023108414A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5889342A (en) * | 1995-12-21 | 1999-03-30 | Aisin Aw Co., Ltd. | Motor cooling circuit |
CN207098801U (en) * | 2017-05-22 | 2018-03-13 | 比亚迪股份有限公司 | A kind of motor with cooling oil path |
WO2021176309A1 (en) * | 2020-03-02 | 2021-09-10 | Nidec Corporation | Rotor arrangement having a liquid-cooled rotor |
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