Rotor housing, rotor component, excitation unit, cooling system, electrically excited synchronous motor, drive assembly and vehicle

Abstract

The utility model discloses a rotor housing, a rotor component, an excitation unit, a cooling system, an electro-magnetic synchronous motor, a driving assembly and a vehicle, the rotor housing is provided with an excitation cooling flow path, a rotor cooling outlet and a stator cooling outlet, and the rotor cooling outlet and the stator cooling outlet are respectively communicated with the excitation cooling flow path. The rotor cooling outlet is used for being communicated with an excitation rotor magnetic core, and the stator cooling outlet is communicated with an excitation stator component. Therefore, the excitation rotor magnetic core can be directly cooled, the efficiency of cooling the excitation rotor magnetic core can be improved, the excitation stator part can be directly cooled, and the efficiency of cooling the excitation stator part can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor housing, a rotor component, an excitation unit, a cooling system, an electrically excited synchronous motor, a drive assembly and a vehicle. Background Art

[0002] In the prior art, there are few cooling methods for the excitation unit of an electrically excited synchronous motor. The excitation unit mainly relies on air cooling for heat dissipation. Through this indirect cooling method, the circuit board, magnetic core and winding inside the excitation unit are cooled. This cooling method has the problems of slow cooling speed and low cooling efficiency. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide an excitation rotor housing of an excitation unit, in which the excitation cooling flow path in the excitation rotor housing can directly cool the excitation rotor magnetic core, so as to improve the cooling efficiency of the excitation rotor magnetic core, and can also directly cool the excitation stator component, so as to improve the cooling efficiency of the excitation stator component.

[0004] The utility model further provides an excitation rotor component.

[0005] The utility model further provides an excitation unit.

[0006] The utility model further provides an excitation unit cooling system for a motor.

[0007] The utility model further provides an electrically excited synchronous motor.

[0008] The utility model further provides a drive assembly.

[0009] The utility model also provides a vehicle.

[0010] According to an embodiment of the first aspect of the utility model, for the excitation rotor housing of the excitation unit, the excitation rotor housing is provided with an excitation cooling flow path, a rotor cooling outlet and a stator cooling outlet. The rotor cooling outlet and the stator cooling outlet are respectively communicated with the excitation cooling flow path. The rotor cooling outlet is used for communicating with the excitation rotor magnetic core, and the stator cooling outlet is communicated with the excitation stator component.

[0011] Thus, the excitation cooling flow path in the excitation rotor housing of the excitation unit can directly cool the excitation rotor magnetic core, so as to improve the cooling efficiency of the excitation rotor magnetic core, and can also directly cool the excitation stator component, so as to improve the cooling efficiency of the excitation stator component.

[0012] According to some embodiments of the present utility model, the exciting rotor housing includes: a disk body; a protruding portion disposed on a side of the disk body facing the exciting stator component; wherein, the exciting cooling flow path is disposed in the disk body and the protruding portion, the rotor cooling outlet is disposed in the disk body, and the stator cooling outlet is disposed in the protruding portion.

[0013] According to some embodiments of the present utility model, the exciting cooling flow path includes: a liquid inlet flow path formed in the disk body, the liquid inlet flow path communicating with the stator cooling outlet; a rotor cooling flow path formed in the disk body and located outside the protruding portion in the radial direction of the disk body, the rotor cooling flow path communicating with the liquid inlet flow path and the rotor cooling outlet respectively.

[0014] According to some embodiments of the present utility model, the rotor cooling flow path includes: a plurality of annular flow paths, each annular flow path extending along the circumferential direction of the disk body, the plurality of annular flow paths being spaced apart in the radial direction of the disk body, and the innermost annular flow path communicating with the liquid inlet flow path; a first communication flow path communicating between two adjacent annular flow paths.

[0015] According to some embodiments of the present utility model, one side of each annular flow path facing the exciting rotor core is open to form the rotor cooling outlet.

[0016] According to some embodiments of the present utility model, the shape of the annular flow path is one of a circular ring shape, an elliptical ring shape, and a polygonal ring shape.

[0017] According to some embodiments of the present utility model, there are at least two first communication flow paths between two adjacent annular flow paths and they are spaced apart in the circumferential direction of the annular flow path.

[0018] According to some embodiments of the present utility model, there are at least three annular flow paths, and the first communication flow paths on the inner side and the outer side of the annular flow paths are staggeredly arranged in the circumferential direction of the disk body.

[0019] According to some embodiments of the present utility model, the shape of the rotor cooling flow path is spiral.

[0020] According to some embodiments of the present utility model, the exciting rotor housing further includes: an inner ring portion formed with a shaft hole for the rotor shaft to pass through, the disk body surrounding the outer peripheral side of the inner ring portion; wherein, the exciting cooling flow path has an inlet formed in the inner ring portion, and the liquid inlet flow path extends to the inner ring portion and communicates with the inlet.

[0021] According to some embodiments of the present utility model, there are multiple liquid inlet flow paths, and there are multiple inlets. The multiple inlets are circumferentially spaced apart on the circumferential wall of the shaft hole. The multiple inlets are in one-to-one communication with the multiple liquid inlet flow paths, and the multiple liquid inlet flow paths are respectively connected to different positions of the rotor cooling flow path.

[0022] According to some embodiments of the present utility model, the field excitation cooling flow path further includes: a second communication flow path, which is arranged on the protruding part, and the stator cooling outlet is communicated with the liquid inlet flow path through the second communication flow path.

[0023] According to some embodiments of the present utility model, there are multiple liquid inlet flow paths, multiple second communication flow paths, and multiple stator cooling outlets. Each stator cooling outlet is communicated with one liquid inlet flow path through one second communication flow path.

[0024] According to some embodiments of the present utility model, the protruding part extends along the circumferential direction of the disk body.

[0025] According to some embodiments of the present utility model, the field excitation rotor housing further includes: an outer ring part, which surrounds the outer peripheral side of the disk body; wherein, the field excitation cooling flow path has an outlet, and the outlet is located on the outer ring part. The field excitation cooling flow path splashes the coolant to the outer shell of the motor through the outlet and then splashes back to the field excitation stator component.

[0026] According to some embodiments of the present utility model, the field excitation rotor housing further includes: an outer ring part, which surrounds the outer peripheral side of the disk body, and the axial two ends of the outer ring part respectively extend beyond the axial two sides of the disk body; wherein, the part of the outer ring part that extends beyond the disk body towards the field excitation stator component surrounds a first accommodation groove, and the part of the outer ring part that extends beyond the disk body away from the field excitation stator component surrounds a second accommodation groove. The first accommodation groove is used to accommodate the field excitation rotor core, and the second accommodation groove is used to accommodate the circuit board.

[0027] According to some embodiments of the present utility model, the field excitation rotor housing is an integral part.

[0028] The field excitation rotor component according to the embodiment of the second aspect of the present utility model includes the field excitation rotor housing of the above-mentioned field excitation unit.

[0029] According to some embodiments of the present utility model, the exciting rotor component further includes: an exciting rotor core disposed in the exciting rotor housing; an exciting rotor winding disposed on the exciting rotor core; a circuit board disposed in the exciting rotor housing; wherein, a first filler is provided between the exciting rotor core and the exciting rotor housing; and / or a second filler is provided between the circuit board and the exciting rotor housing; and / or a third filler is provided between the exciting rotor winding and the exciting rotor core.

[0030] The exciting unit according to the third aspect embodiment of the present utility model includes: an exciting stator component; the above-mentioned exciting rotor component, the exciting rotor component being spaced apart from the exciting stator component.

[0031] According to some embodiments of the present utility model, the exciting stator component includes: an exciting stator housing; an exciting stator core disposed in the exciting stator housing; an exciting stator winding disposed on the exciting stator core; wherein, a fourth filler is provided between the exciting stator winding and the exciting stator core.

[0032] The exciting unit cooling system of the motor according to the fourth aspect embodiment of the present utility model includes: a rotor shaft in which a main cooling flow path is formed; the above-mentioned exciting unit, the exciting rotor component being sleeved on the rotor shaft; wherein, the rotor shaft is provided with a main coolant outlet communicating with the main cooling flow path, and the main coolant outlet is communicated with the exciting cooling flow path to convey the coolant in the main cooling flow path to the exciting cooling flow path.

[0033] The electrically excited synchronous motor according to the fifth aspect embodiment of the present utility model includes: the above-mentioned exciting unit cooling system of the motor.

[0034] The drive assembly according to the sixth aspect embodiment of the present utility model includes: the above-mentioned electrically excited synchronous motor.

[0035] The vehicle according to the seventh aspect embodiment of the present utility model includes: the above-mentioned electrically excited synchronous motor or the above-mentioned drive assembly.

[0036] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0038] Figure 1It is a schematic structural diagram of the excitation unit cooling system of a motor according to an embodiment of the present utility model;

[0039] Figure 2 It is a cross-sectional view of the excitation unit cooling system of a motor according to an embodiment of the present utility model;

[0040] Figure 3 It is a schematic structural diagram of the excitation rotor housing of the excitation unit according to an embodiment of the present utility model;

[0041] Figure 4 It is an exploded view of the excitation unit cooling system of a motor according to an embodiment of the present utility model;

[0042] Figure 5 It is a schematic structural diagram of the excitation stator housing containing the excitation stator winding according to an embodiment of the present utility model.

[0043] Reference numerals:

[0044] 100. Excitation rotor housing;

[0045] 10. Excitation cooling flow path; 11. Rotor cooling outlet; 12. Stator cooling outlet; 13. Liquid inlet flow path; 14. Rotor cooling flow path; 141. Annular flow path; 142. First communication flow path;

[0046] 20. Excitation rotor core;

[0047] 30. Excitation stator component; 31. Excitation stator housing; 32. Excitation stator core; 33. Excitation stator winding;

[0048] 40. Disk body; 41. Protruding part;

[0049] 50. Inner ring part; 51. Shaft hole;

[0050] 60. Inlet; 61. Outlet;

[0051] 70. Second communication flow path;

[0052] 80. Outer ring part; 81. First accommodation groove; 82. Second accommodation groove; 83. Through hole;

[0053] 91. Excitation rotor component; 92. Excitation rotor winding; 93. Circuit board;

[0054] 200. Excitation unit;

[0055] 300. Excitation unit cooling system of the motor; 301. Rotor shaft; 302. Main cooling flow path; 303. Main coolant outlet; 310. Air gap. Detailed implementation manners

[0056] Embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary.

[0057] Reference will be made below Figures 1-5 to describe the exciting rotor housing 100 of the exciting unit according to an embodiment of the present utility model.

[0058] As Figure 1 and Figure 2 shown, for the exciting rotor housing 100 of the exciting unit according to an embodiment of the first aspect of the present utility model, the exciting rotor housing is provided with an exciting cooling flow path 10, a rotor cooling outlet 11, and a stator cooling outlet 12. The rotor cooling outlet 11 and the stator cooling outlet 12 are respectively communicated with the exciting cooling flow path 10. The rotor cooling outlet 11 is used to communicate with the exciting rotor core 20, and the stator cooling outlet 12 is communicated with the exciting stator component 30.

[0059] Specifically, the cooling system of the exciting unit of a traditional motor mainly relies on air cooling to dissipate heat from the exciting unit housing. This indirect cooling method does not directly cool the circuit board, core, and winding inside the exciting unit, resulting in a problem of low cooling efficiency. Due to the low cooling efficiency, the motor is overheated and damaged, affecting the service life of the motor.

[0060] Therefore, the exciting rotor housing 100 of this exciting unit is provided with an exciting cooling flow path 10. Since the exciting rotor housing 100 is in contact with the exciting rotor core 20, the coolant in the exciting cooling flow path 10 flows through the rotor cooling outlet 11 to the exciting rotor core 20, which can directly cool the exciting rotor core 20, thereby improving the cooling efficiency of the exciting rotor core 20. Among them, the coolant can be oil.

[0061] In addition, the exciting rotor housing 100 is provided with a stator cooling outlet 12. The coolant in the exciting cooling flow path 10 flows through the stator cooling outlet 12 to the exciting stator component 30, which can directly cool the exciting stator component 30, thereby improving the cooling efficiency of the exciting stator component 30.

[0062] Thus, the exciting cooling flow path 10 in the exciting rotor housing 100 of this exciting unit can directly cool the exciting rotor core 20, thereby improving the cooling efficiency of the exciting rotor core 20, and can also directly cool the exciting stator component 30, thereby improving the cooling efficiency of the exciting stator component 30.

[0063] According to some embodiments of the present utility model, as Figure 3As shown, the exciting rotor housing includes: a disk body 40 and a protruding portion 41. The protruding portion 41 is disposed on a side of the disk body 40 facing the exciting stator component 30. Among them, the exciting cooling flow path 10 is disposed in the disk body 40 and the protruding portion 41. The rotor cooling outlet 11 is disposed in the disk body 40, and the stator cooling outlet 12 is disposed in the protruding portion 41.

[0064] Among them, the exciting rotor housing 100 is mainly composed of a disk body 40 and a protruding portion 41. The protruding portion 41 is disposed on the disk body 40, and the protruding portion 41 protrudes on a side facing the exciting stator component 30. Since the stator cooling outlet 12 is disposed in the protruding portion 41, the coolant can flow out from the stator cooling outlet 12, thereby facilitating direct cooling of the exciting stator component 30.

[0065] In addition, the disk body 40 can provide space for the arrangement of the exciting cooling flow path 10. The rotor cooling outlet 11 is disposed in the exciting cooling flow path 10 in the disk body 40. The coolant in the exciting cooling flow path 10 can flow out from the rotor cooling outlet 11, thereby facilitating direct cooling of the exciting rotor core 20.

[0066] According to some embodiments of the present invention, as Figure 2 and Figure 3 shown, the exciting cooling flow path 10 includes: an inlet flow path 13 and a rotor cooling flow path 14. The inlet flow path 13 is formed in the disk body 40. The inlet flow path 13 is communicated with the stator cooling outlet 12. The rotor cooling flow path 14 is formed in the disk body 40, and the rotor cooling flow path 14 is located outside the protruding portion 41 in the radial direction of the disk body 40. The rotor cooling flow path 14 is respectively communicated with the inlet flow path 13 and the rotor cooling outlet 11.

[0067] Among them, the inlet flow path 13 is communicated with the stator cooling outlet 12, so that the coolant in the inlet flow path 13 can flow out from the stator cooling outlet 12. There is a gap between the stator cooling outlet 12 and the exciting stator component 30. The coolant in the inlet flow path 13 can be sprayed onto the exciting stator component 30 through the stator cooling outlet 12, thereby dissipating heat from the exciting stator component 30.

[0068] In addition, the rotor cooling flow path 14 is respectively communicated with the inlet flow path 13 and the rotor cooling outlet 11. The coolant in the inlet flow path 13 enters the rotor cooling flow path 14, and the coolant in the rotor cooling flow path 14 can flow to the exciting rotor core 20 through the rotor cooling outlet 11, thereby dissipating heat from the exciting rotor core 20.

[0069] According to specific embodiments of the present invention, as Figure 3As shown, the rotor cooling flow path 14 includes: a plurality of annular flow paths 141 and a first connecting flow path 142. Each annular flow path 141 extends circumferentially along the disk body 40. The plurality of annular flow paths 141 are spaced apart radially on the disk body 40. The innermost annular flow path 141 communicates with the liquid inlet flow path 13. The first connecting flow path 142 communicates between two adjacent annular flow paths 141.

[0070] Specifically, the plurality of annular flow paths 141 surround along the circumferential direction of the disk body 40. Moreover, the plurality of annular flow paths 141 are evenly spaced apart radially on the disk body 40. In this way, the coolant in the annular flow paths 141 can uniformly cool and dissipate heat from the field rotor core 20 on the disk body 40, thereby avoiding excessive local temperature of the field rotor core 20.

[0071] Furthermore, the innermost annular flow path 141 communicates with the liquid inlet flow path 13, which can enable the coolant in the liquid inlet flow path 13 to enter the annular flow path 141. Also, two adjacent annular flow paths 141 are connected through the first connecting flow path 142. In this way, the coolant between the plurality of annular flow paths 141 can circulate, and thus the heat of the field rotor core 20 can be taken away through heat exchange.

[0072] According to some embodiments of the present invention, as Figure 3 shown, one side of each annular flow path 141 facing the field rotor core 20 is open to form a rotor cooling outlet 11.

[0073] Among them, each annular flow path 141 is provided with a rotor cooling outlet 11, so that a plurality of rotor cooling outlets 11 can be formed. The coolant in each annular flow path 141 is sprayed onto the field rotor core 20 through its corresponding rotor cooling outlet 11, so that the entire field rotor core 20 can be cooled, thereby improving the cooling efficiency of the field rotor core 20.

[0074] According to some embodiments of the present invention, the shape of the annular flow path 141 is one of a circular ring shape, an elliptical ring shape, and a polygonal ring shape.

[0075] Specifically, the shape of the annular flow path 141 can be set as circular ring shapes with different diameters, can also be set as an elliptical ring shape, or can also be set as a polygonal ring shape. Among them, the polygonal ring shape can be a quadrilateral ring shape, a pentagon ring shape, or a hexagon ring shape, etc. The shape of the annular flow path 141 can be set according to the size of the field rotor housing 100.

[0076] Furthermore, the shape of the annular flow path 141 can also be a combination of two or more of a circular ring shape, an elliptical ring shape, and a polygonal ring shape, so that the coolant in the annular flow path 141 can be cooled and dissipated heat through flow paths of different shapes. The annular flow paths 141 with different shapes have different lengths, and the annular flow path 141 with a longer length can further improve the cooling efficiency of the excitation rotor core 20.

[0077] According to some embodiments of the present invention, as Figure 3 shown, there are at least two first communication flow paths 142 between two adjacent annular flow paths 141, and the first communication flow paths 142 are distributed at intervals in the circumferential direction of the annular flow path 141.

[0078] Among them, the first communication flow path 142 can be set to be multiple. In this way, the flow velocity of the coolant between two adjacent annular flow paths 141 can be increased, and thus the heat dissipation speed between the annular flow paths 141 can be improved.

[0079] According to some embodiments of the present invention, as Figure 3 shown, there are at least three annular flow paths 141, and the first communication flow paths 142 on the inner side and the outer side of the annular flow path 141 are staggeredly arranged in the circumferential direction of the disk body 40.

[0080] Among them, the number of the annular flow paths 141 can be set to three, or more than three. The inner annular flow path 141 and the outer annular flow path 141 are both connected through the first communication flow path 142, and moreover, the first communication flow paths 142 are staggeredly arranged in the circumferential direction of the disk body 40. In this way, the annular flow path 141 can make full use of the characteristic of the high-speed rotation of the rotor shaft 301, and can throw the coolant from the inner side of the annular flow path 141 to the outer side of the annular flow path 141, so that there is enough coolant from the inner side to the outer side of the annular flow path 141. In addition, the setting of at least three annular flow paths 141 can increase the contact area between the annular flow path 141 and the excitation rotor core 20, and thus can improve the heat dissipation efficiency.

[0081] According to some embodiments of the present invention, the shape of the rotor cooling flow path 14 is spiral.

[0082] Among them, the rotor cooling flow path 14 can be set to be spiral. In this way, the rotor cooling flow path 14 can form an overall circulation flow path, and the area of the rotor cooling flow path 14 can also be increased, so that the cooling efficiency of the rotor cooling flow path 14 for the excitation rotor core 20 can be further improved.

[0083] According to some embodiments of the present invention, as Figure 2 and Figure 3As shown, the exciting rotor housing further includes: an inner ring portion 50, an axial hole 51 is formed in the inner ring portion 50 for the rotor shaft 301 to pass through, and the disk body 40 surrounds the outer peripheral side of the inner ring portion 50. Among them, the exciting cooling flow path 10 has an inlet 60, the inlet 60 is formed in the inner ring portion 50, the liquid inlet flow path 13 extends to the inner ring portion 50, and the liquid inlet flow path 13 is communicated with the inlet 60.

[0084] Specifically, the inner ring portion 50 is provided with the axial hole 51, which is convenient for the rotor shaft 301 to penetrate. During the working process, since the liquid inlet flow path 13 is communicated with the inlet 60, the coolant enters the liquid inlet flow path 13 from the inlet 60. Then, the coolant in the liquid inlet flow path 13 enters the exciting cooling flow path 10. In this way, the coolant in the exciting cooling flow path 10 can dissipate heat from the inner ring portion 50 and the disk body 40, and can also increase the contact area between the exciting cooling flow path 10 and the inner ring portion 50 and the disk body 40, so as to further improve the cooling efficiency of the coolant in the exciting cooling flow path 10 for the exciting rotor magnetic core 20.

[0085] According to some embodiments of the present invention, there are a plurality of liquid inlet flow paths 13 and a plurality of inlets 60. The plurality of inlets 60 are circumferentially spaced apart on the circumferential wall of the axial hole 51. The plurality of inlets 60 are communicated with the plurality of liquid inlet flow paths 13 in one-to-one correspondence, and the plurality of liquid inlet flow paths 13 are respectively connected to different positions of the rotor cooling flow path 14.

[0086] Specifically, due to the arrangement of the plurality of inlets 60 and the plurality of liquid inlet flow paths 13, the coolant can enter the rotor cooling flow path 14 from different directions, so that the coolant in the rotor cooling flow path 14 can cool the exciting rotor magnetic core 20 in different directions.

[0087] In addition, the arrangement of the plurality of liquid inlet flow paths 13 can not only provide sufficient coolant for the rotor cooling flow path 14, but also improve the speed of delivering the coolant to the rotor cooling flow path 14, so as to further improve the cooling efficiency of the coolant in the rotor cooling flow path 14 for the exciting rotor magnetic core 20.

[0088] According to some embodiments of the present invention, as Figure 2 shown, the exciting cooling flow path 10 further includes: a second communication flow path 70, the second communication flow path 70 is arranged on the protruding portion 41, and the stator cooling outlet 12 is communicated with the liquid inlet flow path 13 through the second communication flow path 70.

[0089] Specifically, since the liquid inlet flow path 13 is respectively connected to the rotor cooling flow path 14 and the second communication flow path 70, a part of the coolant in the liquid inlet flow path 13 enters the rotor cooling flow path 14, and the coolant in the rotor cooling flow path 14 can cool the exciting rotor core 20. Another part of the coolant enters the second communication flow path 70, so that the coolant in the second communication flow path 70 can be sprayed to the exciting stator component 30 through the stator cooling outlet 12. The arranged exciting cooling flow path 10 is simple in layout and can achieve the function of cooling the exciting rotor core 20 and the exciting stator component 30 simultaneously.

[0090] According to some embodiments of the present invention, there are a plurality of liquid inlet flow paths 13, a plurality of second communication flow paths 70, and a plurality of stator cooling outlets 12. Each stator cooling outlet 12 is connected to a liquid inlet flow path 13 through a second communication flow path 70.

[0091] Among them, since there are a plurality of stator cooling outlets 12, correspondingly, there are also a plurality of liquid inlet flow paths 13 and second communication flow paths 70. In this way, each stator cooling outlet 12 can spray coolant to the exciting stator component 30 through the liquid inlet flow path 13 and the second communication flow path 70, thereby improving the heat dissipation rate of the exciting stator component 30.

[0092] According to some embodiments of the present invention, as Figure 3 shown, the protruding portion 41 extends along the circumferential direction of the disk body 40.

[0093] Among them, the setting of the protruding portion 41 can provide space for the opening of the stator cooling outlet 12, so that the coolant of the stator cooling outlet 12 can be sprayed onto the exciting stator component 30, thereby cooling the exciting stator component 30.

[0094] In addition, the setting of the protruding portion 41 facilitates the opening of the liquid inlet flow path 13, enabling the coolant in the liquid inlet flow path 13 to enter the rotor cooling flow path 14, thereby cooling the exciting rotor core 20.

[0095] According to some embodiments of the present invention, as Figure 2 and Figure 3 shown, the exciting rotor housing 100 further includes: an outer ring portion 80, and the outer ring portion 80 surrounds the outer peripheral side of the disk body 40. Among them, the exciting cooling flow path 10 has an outlet 61, and the outlet 61 is located in the outer ring portion 80. The exciting cooling flow path 10 sputters the coolant to the outer shell of the motor through the outlet 61 and then sputters it back to the exciting stator component 30.

[0096] Among them, the outer ring portion 80 is provided with an outlet 61 of the excitation cooling flow path 10. A plurality of outlets 61 can be arranged around the outer peripheral side of the disk body 40. Due to the characteristic of the high-speed rotation of the rotor shaft 301, the coolant in the excitation cooling flow path 10 can be sputtered to the outer shell of the motor through the outlet 61, and the coolant on the outer shell of the motor can be sputtered back to the excitation stator component 30. In this way, the excitation cooling flow path 10 can not only cool the excitation rotor core 20, but also indirectly cool the excitation stator component 30, thereby further improving the cooling efficiency of the excitation stator component 30.

[0097] According to some embodiments of the present invention, as Figures 2-5 shown, the excitation rotor housing further includes: an outer ring portion 80, which surrounds the outer peripheral side of the disk body 40. The axial two ends of the outer ring portion 80 respectively extend beyond the axial two sides of the disk body 40. Among them, the part of the outer ring portion 80 that extends beyond the disk body 40 towards the excitation stator component 30 surrounds a first receiving groove 81, and the part of the outer ring portion 80 that extends beyond the disk body 40 away from the excitation stator component 30 surrounds a second receiving groove 82. The first receiving groove 81 is used to receive the excitation rotor core 20, and the second receiving groove 82 is used to receive the circuit board 93.

[0098] Among them, a part of the outer ring portion 80 that extends towards the excitation stator component 30 forms a first receiving groove 81, and the first receiving groove 81 can provide an installation space for the excitation rotor core 20. A part of the outer ring portion 80 that extends away from the excitation stator component 30 on the other side forms a second receiving groove 82, and the second receiving groove 82 can provide an installation space for the circuit board 93.

[0099] In addition, the circuit board 93 is integrated on the excitation rotor housing 100 and is fixed by passing a fixing bolt through the through hole 83. In this way, the heat generated by the electrical components on the circuit board 93 during operation can be dissipated.

[0100] According to some embodiments of the present invention, as Figure 3 shown, the excitation rotor housing 100 is a one-piece.

[0101] Among them, the excitation rotor housing 100 can be a one-piece formed by integral molding. In this way, not only can the strength and stiffness of the excitation rotor housing 100 be improved, thereby improving the service life of the excitation rotor housing 100, but also the manufacturing efficiency of the excitation rotor housing 100 can be improved.

[0102] The excitation rotor component 91 according to the second aspect embodiment of the present invention includes the excitation rotor housing 100 of the excitation unit in the above embodiment.

[0103] According to some embodiments of the present invention, as Figure 4 and Figure 5As shown in the figure, the exciting rotor component 91 further includes: an exciting rotor core 20, an exciting rotor winding 92, and a circuit board 93. The exciting rotor core 20 is disposed in the exciting rotor housing 100, the exciting rotor winding 92 is disposed on the exciting rotor core 20, and the circuit board 93 is disposed in the exciting rotor housing 100. Among them, a first filling member is provided between the exciting rotor core 20 and the exciting rotor housing 100, a second filling member is provided between the circuit board 93 and the exciting rotor housing 100, and a third filling member is provided between the exciting rotor winding 92 and the exciting rotor core 20.

[0104] Among them, the exciting rotor housing 100 provides an installation space for the exciting rotor core 20, the exciting rotor winding 92, and the circuit board 93, thereby protecting the exciting rotor core 20, the exciting rotor winding 92, and the circuit board 93.

[0105] In addition, the first filling member can be epoxy resin with a relatively high heat transfer efficiency, and the epoxy resin can be filled between the exciting rotor core 20 and the exciting rotor housing 100. In this way, the heat dissipation speed between the exciting rotor core 20 and the exciting rotor housing 100 can be further improved, and the stiffness of the exciting rotor component 91 can also be increased.

[0106] Moreover, a second filling member is provided between the circuit board 93 and the exciting rotor housing 100. The second filling member can be epoxy resin, and the epoxy resin can be filled between the circuit board 93 and the exciting rotor housing 100. In this way, the heat dissipation speed between the circuit board 93 and the exciting rotor housing 100 can be further improved, and the stiffness of the exciting rotor component 91 can also be further increased.

[0107] Furthermore, a third filling member is provided between the exciting rotor winding 92 and the exciting rotor core 20. The third filling member can be epoxy resin, and the epoxy resin is filled between the exciting rotor winding 92 and the exciting rotor core 20. In this way, the heat dissipation speed between the exciting rotor winding 92 and the exciting rotor core 20 can be further improved, and the stiffness of the exciting rotor component 91 can also be further increased.

[0108] As Figure 2 shown, the exciting unit 200 according to the third aspect embodiment of the present invention includes: an exciting stator component 30 and the exciting rotor component 91 in the above embodiment, and the exciting rotor component 91 is spaced apart from the exciting stator component 30.

[0109] Among them, there is a 1-mm air gap 310 between the exciting rotor component 91 and the exciting stator component 30. The size of the air gap 310 can be adjusted to the optimal value according to the electromagnetic design scheme. The wire outlet holes of the exciting rotor core 20 and the exciting stator core 32 are used for the enameled wire to pass through. When the alternating current flows into the exciting stator winding 33 from the wire outlet hole of the exciting stator core 32, after the alternating current generates an alternating magnetic field, it passes through the exciting stator core 32 and the air gap 310. The air gap 310 transfers energy to the exciting rotor winding 92, and then an alternating current is induced in the exciting rotor winding 92, realizing wireless energy transmission. The current after wireless energy transmission flows from the exciting rotor winding 92 through the wire outlet hole into the wound-rotor winding of the motor for operation.

[0110] Moreover, the coolant can also be sprayed into the air gap 310. The coolant entering the air gap 310 can directly cool the exciting stator core 32 and the exciting stator winding 33, thereby enhancing the heat dissipation capacity of the exciting stator component 30.

[0111] According to some embodiments of the present invention, as Figure 5 shown, the exciting stator component 30 includes: an exciting stator housing 31, an exciting stator core 32, and an exciting stator winding 33. The exciting stator core 32 is disposed in the exciting stator housing 31, and the exciting stator winding 33 is disposed on the exciting stator core 32. Among them, a fourth filling member is provided between the exciting stator winding 33 and the exciting stator core 32.

[0112] Among them, the fourth filling member can be epoxy resin, and the epoxy resin can be filled between the exciting stator winding 33 and the exciting stator core 32. In this way, the heat dissipation speed between the exciting stator winding 33 and the exciting stator core 32 can be further improved, and the stiffness of the exciting stator component 30 can also be increased.

[0113] As Figure 1 and Figure 2 shown, according to the exciting unit cooling system 300 of the motor according to the fourth aspect embodiment of the present invention, it includes: a rotor shaft 301 and the exciting unit 200 of the above embodiment. A main cooling flow path 302 is formed inside the rotor shaft 301, and the exciting rotor component 91 is sleeved on the rotor shaft 301. Among them, the rotor shaft 301 is provided with a main coolant outlet 303 communicating with the main cooling flow path 302, and the main coolant outlet 303 is communicated with the exciting cooling flow path 10, so that the coolant in the main cooling flow path 302 can be conveyed to the exciting cooling flow path 10.

[0114] Among them, coolant can be delivered to the excitation unit 200 through the main cooling flow path 302. The excitation rotor component 91 is sleeved on the rotor shaft 301, connecting the rotor shaft 301 and the excitation rotor component 91, which facilitates the coolant in the main cooling flow path 302 to flow into the excitation cooling flow path 10 through the main coolant outlet 303, so as to directly cool the excitation rotor component 91 and avoid overheating damage of the motor.

[0115] In addition, due to the action of centrifugal force, the coolant in the main cooling flow path 302 can be thrown into the excitation unit 200 by the high-speed rotation of the rotor shaft 301, which can increase the speed of coolant delivery and thus improve the cooling efficiency of the excitation unit 200.

[0116] The electric excitation synchronous motor according to the fifth aspect embodiment of the present invention includes the excitation unit cooling system 300 of the motor in the above embodiment.

[0117] The drive assembly according to the sixth aspect embodiment of the present invention includes the electric excitation synchronous motor in the above embodiment.

[0118] The vehicle according to the seventh aspect embodiment of the present invention includes the electric excitation synchronous motor in the above embodiment or the drive assembly in the above embodiment.

[0119] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0120] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor housing of an excitation unit, characterized in that: The rotor housing is provided with an excitation cooling flow path, a rotor cooling outlet and a stator cooling outlet. The rotor cooling outlet and the stator cooling outlet are respectively connected to the excitation cooling flow path. The rotor cooling outlet is used to communicate with the excitation rotor core, and the stator cooling outlet is connected to the excitation stator component.

2. The rotor housing of the excitation unit according to claim 1, characterized in that: The rotor housing comprises: Plate body; A protrusion, wherein the protrusion is arranged on a side of the disk body facing the excitation stator component; The excitation cooling flow path is arranged on the disk body and the protrusion, the rotor cooling outlet is arranged on the disk body, and the stator cooling outlet is arranged on the protrusion.

3. The rotor housing of the excitation unit according to claim 2, characterized in that: The excitation cooling flow path comprises: A liquid inlet flow path, the liquid inlet flow path is formed on the disc body, and the liquid inlet flow path is communicated with the stator cooling outlet; A rotor cooling flow path is formed on the disc body and is located outside the protrusion in the radial direction of the disc body. The rotor cooling flow path is communicated with the liquid inlet flow path and the rotor cooling outlet respectively.

4. The rotor housing of the excitation unit according to claim 3, characterized in that: The rotor cooling flow path comprises: A plurality of annular flow paths, each of which extends along the circumference of the disc body, and the plurality of annular flow paths are spaced apart in the radial direction of the disc body, and the innermost annular flow path is connected to the liquid inlet flow path; A first communication flow path is provided, wherein the first communication flow path communicates between two adjacent annular flow paths.

5. The rotor housing of the excitation unit according to claim 4, characterized in that: One side of each of the annular flow paths facing the excitation rotor core is open to form the rotor cooling outlet.

6. The rotor housing of the excitation unit according to claim 4, characterized in that: The shape of the annular flow path is one of a circular ring, an elliptical ring and a polygonal ring.

7. The rotor housing of the excitation unit according to claim 4, characterized in that: There are at least two first communication flow paths between two adjacent annular flow paths, and the first communication flow paths are spaced apart and distributed in the circumferential direction of the annular flow paths.

8. The rotor housing of the excitation unit according to claim 4, characterized in that: There are at least three annular flow paths, and the first communicating flow paths inside and outside the annular flow paths are staggered in the circumferential direction of the disk body.

9. The rotor housing of the excitation unit according to claim 3, characterized in that: The rotor cooling flow path is in a spiral shape.

10. The rotor housing of the excitation unit according to claim 3, characterized in that: The rotor housing further comprises: An inner ring portion, wherein the inner ring portion is formed with an axial hole for the rotor shaft to pass through, and the disc body surrounds the outer circumference of the inner ring portion; The excitation cooling flow path has an inlet formed in the inner ring portion, and the liquid inlet flow path extends to the inner ring portion and is in communication with the inlet.

11. The rotor housing of the excitation unit according to claim 10, characterized in that: There are multiple liquid inlet flow paths and multiple inlets. The multiple inlets are spaced apart in the circumferential direction of the peripheral wall of the axial hole. The multiple inlets are connected to the multiple liquid inlet flow paths in a one-to-one correspondence. The multiple liquid inlet flow paths are respectively connected to different positions of the rotor cooling flow path.

12. The rotor housing of the excitation unit according to claim 3, characterized in that: The excitation cooling flow path also includes: A second communicating flow path is provided at the protruding portion, and the stator cooling outlet is communicated with the liquid inlet flow path through the second communicating flow path.

13. The rotor housing of the excitation unit according to claim 12, characterized in that: There are a plurality of the liquid inlet flow paths, a plurality of the second communicating flow paths, and a plurality of the stator cooling outlets, and each of the stator cooling outlets is connected to a liquid inlet flow path through a second communicating flow path.

14. The rotor housing of the excitation unit according to claim 2, characterized in that: The protrusion extends along the circumference of the disk body.

15. The rotor housing of the excitation unit according to claim 2, characterized in that: The rotor housing further comprises: An outer ring portion, the outer ring portion surrounding the outer circumference of the disk; The excitation cooling flow path has an outlet, and the outlet is located at the outer ring part. The excitation cooling flow path splashes the cooling liquid to the housing of the motor through the outlet and back splashes to the excitation stator component.

16. The rotor housing of the excitation unit according to claim 2, characterized in that: The rotor housing further comprises: An outer ring portion, the outer ring portion surrounds the outer circumference of the disc body, and the axial ends of the outer ring portion extend beyond the axial sides of the disc body respectively; The portion of the outer ring portion that extends beyond the disk body and faces the excitation stator component surrounds a first accommodating groove, and the portion of the outer ring portion that extends beyond the disk body and faces away from the excitation stator component surrounds a second accommodating groove. The first accommodating groove is used to accommodate the excitation rotor core, and the second accommodating groove is used to accommodate a circuit board.

17. The rotor housing of the excitation unit according to any one of claims 1 to 16, characterized in that: The rotor housing is an integral piece.

18. A rotor component, characterized in that: A rotor housing comprising an excitation unit according to any one of claims 1-17.

19. The rotor component according to claim 18, characterized in that The rotor component also includes: An excitation rotor core, wherein the excitation rotor core is arranged on the rotor housing; An excitation rotor winding, wherein the excitation rotor winding is arranged on the excitation rotor core; A circuit board, wherein the circuit board is arranged on the rotor housing; Wherein, a first filling piece is provided between the excitation rotor core and the rotor housing; and / or A second filling piece is provided between the circuit board and the rotor housing; and / or A third filling piece is provided between the excitation rotor winding and the excitation rotor core.

20. An excitation unit, characterized in that: include: Excitation stator components; According to the rotor component according to any one of claims 18 to 19, the rotor component is spaced apart from the excitation stator component.

21. The excitation unit according to claim 20, characterized in that: The excitation stator component comprises: Excitation stator housing; An excitation stator core, wherein the excitation stator core is arranged on the excitation stator housing; An excitation stator winding, wherein the excitation stator winding is arranged on the excitation stator core; Wherein, a fourth filling piece is provided between the excitation stator winding and the excitation stator core.

22. A cooling system for a motor, characterized in that: include: a rotor shaft having a main cooling flow path formed therein; The excitation unit according to any one of claims 20 to 21, wherein the rotor component is sleeved on the rotor shaft; The rotor shaft is provided with a main coolant outlet connected to the main cooling flow path, and the main coolant outlet is connected to the excitation cooling flow path to transport the coolant in the main cooling flow path to the excitation cooling flow path.

23. An electrically excited synchronous motor, characterized in that: include: A cooling system for an electric machine according to any one of claims 1 to 22.

24. A drive assembly, characterized in that: include: The electrically excited synchronous motor as claimed in claim 23.

25. A vehicle, characterized in that: include: The electrically excited synchronous motor as claimed in claim 23 or the drive assembly as claimed in claim 24.

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