Excitation stator part, excitation unit, electrically excited synchronous motor, driving assembly and vehicle

Abstract

The utility model discloses an excitation stator component, an excitation unit, an electro-magnetic synchronous motor, a driving assembly and a vehicle, and the excitation stator component comprises an excitation stator housing; an excitation stator magnetic core, wherein the excitation stator magnetic core is arranged on the excitation stator shell; wherein the excitation stator shell is provided with an excitation cooling branch circuit, and the excitation cooling branch circuit is used for cooling the excitation stator magnetic core. Therefore, by arranging the excitation cooling branch on the excitation stator shell, the excitation stator magnetic core can be directly cooled, so that the cooling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to an excitation stator component, an excitation unit, a motor and a vehicle. Background Art

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

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an excitation stator component, which can directly cool the excitation stator core, thereby improving the cooling efficiency.

[0004] The utility model further proposes an excitation unit.

[0005] The utility model further proposes an electrically excited synchronous motor.

[0006] The utility model further proposes a driving assembly.

[0007] The utility model further provides a vehicle.

[0008] According to the first aspect of the utility model, the excitation stator component includes: an excitation stator housing; an excitation stator core, wherein the excitation stator core is arranged in the excitation stator housing; wherein the excitation stator housing is provided with an excitation cooling branch, and the excitation cooling branch is used to cool the excitation stator core.

[0009] Therefore, by arranging an excitation cooling branch on the excitation stator housing, the excitation stator core can be directly cooled, thereby improving the cooling efficiency.

[0010] In some examples of the present invention, the excitation stator housing is provided with a stator cooling outlet connected to the excitation cooling branch, and the stator cooling outlet is connected to the excitation stator core.

[0011] In some examples of the present invention, the excitation stator housing includes: a stator outer ring portion; a stator disk body, wherein the stator disk body is arranged on the inner circumference side of the stator outer ring portion, and the excitation stator core is arranged on the stator disk body and surrounded by the stator outer ring portion; wherein the excitation cooling branch has an inlet, wherein the inlet is located on the outer circumference of the stator outer ring portion, and the coolant enters the excitation cooling branch through the inlet.

[0012] In some examples of the present utility model, the excitation cooling branch includes: a liquid inlet flow path, which is provided on the stator disk body and extends radially along the stator disk body, and the inlet passes through the thickness direction of the stator outer ring part and is connected with the liquid inlet flow path; an annular flow path, which is provided on the stator disk body and extends circumferentially along the stator disk body, and the annular flow path is connected with the liquid inlet flow path.

[0013] In some examples of the present invention, there are multiple liquid inlet flow paths and they are arranged at intervals along the circumference of the stator disk body, there are multiple inlets and they are arranged at intervals along the circumference of the outer circumferential surface of the stator outer ring part, the multiple inlets are connected to the multiple liquid inlet flow paths in a one-to-one correspondence, and each of the liquid inlet flow paths is connected to the annular flow path; and / or there are multiple annular flow paths and they are arranged at intervals along the radial direction of the disk body, and each of the annular flow paths is connected to the liquid inlet flow path.

[0014] In some examples of the present invention, the side of the annular flow path facing the excitation stator core is open to form a first stator cooling outlet; and / or the side of the liquid inlet flow path facing the excitation stator core is open to form a second stator cooling outlet.

[0015] In some examples of the present invention, the excitation cooling branch further includes: a liquid guide groove, which is arranged on the outer peripheral surface of the stator outer ring portion and extends along the circumference of the stator outer ring portion, and the plurality of inlets are arranged on the inner wall of the liquid guide groove.

[0016] In some examples of the present invention, the inlet is opened on the inner wall of the liquid guiding groove on a side adjacent to the stator disk.

[0017] In some examples of the present invention, the excitation stator housing has a center line perpendicular to its axial direction and extending in the up and down direction, the liquid inlet flow paths are multiple and symmetrically arranged about the center line, and the inlet is multiple and symmetrically arranged about the center line.

[0018] In some examples of the present invention, the liquid guide groove includes: a first sub-groove and a second sub-groove, the first sub-groove and the second sub-groove are spaced apart in the circumferential direction of the stator outer ring portion and symmetrical about the center line, the multiple inlets located on one side of the center line are arranged on the inner wall of the first sub-groove, and the multiple inlets located on the other side of the center line are arranged on the inner wall of the second sub-groove.

[0019] In some examples of the present invention, the shape of the annular flow path is one of a circular ring, an elliptical ring and a polygonal ring.

[0020] In some examples of the present invention, the excitation cooling branch also includes: a liquid outlet flow path, which is arranged on the stator disk body and extends radially along the stator disk body, and the bottom of the outer peripheral surface of the stator outer ring part is provided with an outlet connected to the liquid outlet flow path.

[0021] In some examples of the present invention, the excitation stator housing has a center line perpendicular to its axial direction and extending in the up and down direction, the liquid outlet flow paths are multiple and symmetrically arranged about the center line, the outlets are multiple and symmetrically arranged about the center line, and the multiple outlets are connected to the multiple liquid outlet flow paths in a one-to-one correspondence.

[0022] In some examples of the present invention, the excitation cooling branch is in a spiral shape.

[0023] In some examples of the present invention, the excitation stator component further includes: an excitation stator winding, the excitation stator winding is arranged on the excitation stator core, and a first filling piece is filled between the excitation stator winding and the excitation stator core.

[0024] According to the second aspect of the utility model, the excitation unit comprises: the above-mentioned excitation stator component.

[0025] In some examples of the utility model, it further includes: an excitation rotor component, wherein the excitation rotor component and the excitation stator component are spaced apart in the axial direction of the motor, and an air gap is formed between the excitation rotor component and the excitation stator component.

[0026] In some examples of the present invention, the excitation rotor component includes: an excitation rotor housing; an excitation rotor core, wherein the excitation rotor core is arranged in the excitation rotor housing; an excitation rotor winding, wherein the excitation rotor winding is arranged in the excitation rotor core, and a second filling piece is arranged between the excitation rotor winding and the excitation rotor core.

[0027] In some examples of the present invention, the excitation rotor component also includes a circuit board; the excitation rotor housing includes: a rotor outer ring portion; a rotor disk body, the rotor disk body surrounding the outer peripheral side of the inner ring portion, and the excitation rotor core is arranged on the rotor disk body; wherein, the portion of the rotor outer ring portion extending beyond the rotor disk body toward the excitation rotor component surrounds a first accommodating groove, and the portion of the rotor outer ring portion extending beyond the rotor disk body away from the excitation rotor component surrounds a second accommodating groove, the excitation rotor core is arranged in the first accommodating groove, and the circuit board is arranged in the second accommodating groove.

[0028] In some examples of the present invention, the first receiving groove and / or the second receiving groove is filled with a third filling member.

[0029] The electrically excited synchronous motor according to the third aspect of the utility model comprises: the excitation unit of the motor mentioned above.

[0030] The drive assembly according to the fourth aspect of the utility model includes: the above-mentioned electrically excited synchronous motor.

[0031] The vehicle according to the fifth aspect of the utility model comprises: the above-mentioned drive assembly or electrically excited synchronous motor.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 is an exploded diagram of an excitation unit according to an embodiment of the utility model;

[0035] Figure 2 It is a schematic diagram of the structure of the excitation rotor housing including a circuit board according to an embodiment of the utility model;

[0036] Figure 3 It is a structural schematic diagram of an excitation stator housing according to an embodiment of the utility model;

[0037] Figure 4 is a schematic structural diagram of a stator cooling outlet according to an embodiment of the utility model;

[0038] Figure 5 It is a structural schematic diagram of an excitation stator housing including a liquid guide groove according to an embodiment of the utility model;

[0039] Figure 6 is a schematic structural diagram of an excitation rotor housing according to an embodiment of the utility model;

[0040] Figure 7 It is a structural schematic diagram of an excitation unit according to an embodiment of the utility model;

[0041] Figure 8 It is a structural schematic diagram of a cooling pipeline according to an embodiment of the utility model.

[0042] Reference numerals:

[0043] 10. Excitation unit;

[0044] 11. Excitation stator component; 111. Excitation stator housing; 112. Excitation stator core; 113. Stator outer ring; 114. Stator disc; 115. Excitation stator winding;

[0045] 12. Excitation rotor components; 13. Air gap;

[0046] 14, excitation cooling branch; 141, liquid inlet flow path; 142, annular flow path; 143, liquid guide groove; 144, first sub-groove; 145, second sub-groove; 146, liquid outlet flow path;

[0047] 15. Excitation rotor winding;

[0048] 16. excitation rotor housing; 161. rotor outer ring; 162. rotor disk; 163. first receiving groove; 164. second receiving groove;

[0049] 17. Excitation rotor core; 18. Circuit board;

[0050] 20. Stator cooling outlet; 21. First stator cooling outlet; 22. Second stator cooling outlet;

[0051] 23. Inlet; 30. Cooling pipe; 31. Main coolant outlet:

[0052] 40. Export. DETAILED DESCRIPTION

[0053] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0054] Reference below Figure 1-Figure 8 The excitation stator component 11 according to the embodiment of the utility model is described, which can directly cool the excitation stator core 112, thereby improving the cooling efficiency.

[0055] Combination Figure 1-Figure 8 As shown, the excitation stator component 11 according to the embodiment of the first aspect of the utility model includes an excitation stator housing 111 and an excitation stator core 112, and the excitation stator core 112 is arranged in the excitation stator housing 111; wherein, the excitation stator housing 111 is provided with an excitation cooling branch 14, and the excitation cooling branch 14 is used to cool the excitation stator core 112.

[0056] Specifically, the excitation stator housing 111 can provide an installation space for the excitation stator core 112. Since the excitation stator core 112 generates heat during operation, the excitation stator core 112 is in direct contact with the excitation stator housing 111. Therefore, an excitation cooling branch 14 is provided on the excitation stator housing 111. In this way, the excitation cooling branch 14 can directly cool the excitation stator core 112.

[0057] In particular, compared with the cooling method of traditional motors (which mainly relies on air cooling to indirectly dissipate heat from the excitation stator housing and the excitation stator core), the cooling method of the embodiment in this case can directly cool the circuit board, core, and winding inside the excitation unit 10, thereby improving the cooling efficiency of the excitation unit 10, thereby avoiding overheating damage to the motor and affecting the service life of the motor.

[0058] Therefore, by providing the excitation cooling branch 14 on the excitation stator housing 111 , the excitation stator core 112 can be directly cooled, thereby improving the cooling efficiency.

[0059] According to some optional embodiments of the present invention, combined with Figure 1 , Figure 3 and Figure 4 As shown, the excitation stator housing 111 is provided with a stator cooling outlet 20 communicating with the excitation cooling branch 14 , and the stator cooling outlet 20 is communicated with the excitation stator core 112 .

[0060] The coolant in the excitation cooling branch 14 can flow out to the excitation stator core 112 through the stator cooling outlet 20 , so that the excitation stator core 112 can be in direct contact with the coolant, thereby achieving direct cooling of the excitation stator core 112 .

[0061] Specifically, combined Figure 3 As shown, the excitation stator housing 111 includes a stator outer ring portion 113 and a stator disk body 114, the stator disk body 114 is arranged on the inner peripheral side of the stator outer ring portion 113, and the excitation stator core 112 is arranged on the stator disk body 114 and surrounded by the stator outer ring portion 113; wherein, the excitation cooling branch 14 has an inlet 23, and the inlet 23 is located on the outer peripheral surface of the stator outer ring portion 113, and the coolant sprayed from the main coolant outlet 31 to the excitation stator component 11 enters the excitation cooling branch 14 through the inlet 23.

[0062] Among them, combined Figure 3 As shown, the excitation stator housing 111 is mainly composed of a stator outer ring portion 113 and a stator disc body 114. The stator disc body 114 is arranged on the inner circumference of the stator outer ring portion 113, which can protect the stator disc body 114. The excitation stator core 112 is in contact with the stator disc body 114, and the stator outer ring portion 113 can also protect the excitation stator core 112.

[0063] In addition, an inlet 23 is provided on the outer peripheral surface of the stator outer ring portion 113, and the coolant of the main coolant outlet 31 is sprayed toward the inlet 23. The setting of the inlet 23 can facilitate the coolant to enter the excitation cooling branch 14, so that the excitation cooling branch 14 can be filled with coolant.

[0064] Furthermore, combined with Figure 3As shown, the excitation cooling branch 14 includes a liquid inlet flow path 141 and an annular flow path 142. The liquid inlet flow path 141 is arranged on the stator disk body 114 and extends radially of the stator disk body 114. The inlet 23 passes through the thickness direction of the stator outer ring portion 113, and the inlet 23 is connected with the liquid inlet flow path 141. The annular flow path 142 is arranged on the stator disk body 114, and the annular flow path 142 extends circumferentially of the stator disk body 114, and the annular flow path 142 is connected with the liquid inlet flow path 141.

[0065] It can be understood that the stator disc body 114 is provided with a liquid inlet flow path 141. When the coolant of the main coolant outlet 31 is sprayed toward the inlet 23, the coolant enters the liquid inlet flow path 141 from the inlet 23. Since the liquid inlet flow path 141 extends radially along the stator disc body 114, the coolant can flow from the outside of the stator disc body 114 to the inside of the stator disc body 114. An annular flow path 142 is provided between the outside of the stator disc body 114 and the inside of the stator disc body 114. The coolant can flow to the annular flow path 142 through the liquid inlet flow path 141, so that the coolant can fill the entire annular flow path 142 along the circumferential direction.

[0066] Specifically, combined Figure 3 As shown, there are multiple liquid inlet flow paths 141, and the multiple liquid inlet flow paths 141 are arranged at intervals along the circumference of the stator disk body 114; there are multiple inlets 23, and the multiple inlets 23 are arranged at intervals along the circumference of the outer circumferential surface of the stator outer ring portion 113; the multiple inlets 23 are connected to the multiple liquid inlet flow paths 141 in a one-to-one correspondence, and each liquid inlet flow path 141 is connected to the annular flow path 142; there are multiple annular flow paths 142, and the annular flow paths 142 are arranged at intervals along the radial direction of the stator disk body 114, and each annular flow path 142 is connected to the liquid inlet flow path 141.

[0067] That is, the plurality of liquid inlet channels 141 can accelerate the speed of the coolant entering the excitation cooling branch 14, and can also increase the flow rate of the coolant entering the excitation cooling branch 14. The liquid inlet channels 141 are arranged at intervals along the circumference of the stator disc 114, so that the coolant can enter the stator disc 114 from different directions, thereby cooling different parts of the stator disc 114.

[0068] Furthermore, combined with Figure 3As shown, since there are multiple inlet flow paths 141, correspondingly, there are also multiple inlet ports 23, and each inlet flow path 141 is connected to each inlet port 23 in a one-to-one correspondence. Each inlet flow path 141 is connected to the annular flow path 142, which can speed up the speed at which the annular flow path 142 is filled with coolant. Moreover, there are multiple annular flow paths 142, and the multiple annular flow paths 142 are evenly spaced along the radial direction of the stator disk body 114, so that the coolant can be evenly distributed on the entire stator disk body 114, so that the excitation stator core 112 in contact with the stator disk body 114 can be evenly cooled.

[0069] Furthermore, combined with Figure 3 and Figure 4 As shown, the side of the annular flow path 142 facing the excitation stator core 112 is open to form a first stator cooling outlet 20 ; and / or the side of the liquid inlet flow path 141 facing the excitation stator core 112 is open to form a second stator cooling outlet 20 .

[0070] It can be understood that the side of the annular flow path 142 facing the excitation stator core 112 is open to form a first stator cooling outlet 21, so that the cooling liquid in the annular flow path 142 can flow out from the first stator cooling outlet 21, thereby cooling the excitation stator core 112 in the circumferential direction, and the liquid inlet flow path 141 extends radially, and the cooling liquid in the liquid inlet flow path 141 can flow out from the second stator cooling outlet 22, thereby cooling the excitation stator core 112 in the radial direction.

[0071] Specifically, combined Figure 3 As shown, the excitation cooling branch 14 further includes a liquid guide groove 143, which is arranged on the outer peripheral surface of the stator outer ring portion 113 and extends along the circumferential direction of the stator outer ring portion 113, and a plurality of inlets 23 are arranged on the inner wall of the liquid guide groove 143. The liquid guide groove 143 is arranged on the outer peripheral surface of the stator outer ring portion 113, so that the liquid guide groove 143 can not only gather the coolant, but also prevent the coolant from splashing, and can also guide the coolant, so that the coolant can accurately enter the liquid inlet flow path 141 through the plurality of inlets 23.

[0072] Furthermore, combined with Figure 3 As shown, the inlet 23 is provided on the inner side wall of the liquid guide groove 143 adjacent to the stator disc 114. The inlet 23 is arranged close to the inner side wall of the stator disc 114, so that it is convenient to communicate with the liquid inlet flow path 141, so that the coolant of the inlet 23 can enter from the liquid inlet flow path 141.

[0073] Specifically, combined Figure 1 and Figure 3As shown, the excitation stator housing 111 has a center line perpendicular to its axial direction and extending in the up-down direction, there are multiple liquid inlet flow paths 141, and the multiple liquid inlet flow paths 141 are symmetrically arranged about the center line, there are multiple inlets 23, and the multiple inlets 23 are symmetrically arranged about the center line.

[0074] That is to say, the multiple liquid inlet flow paths 141 are symmetrically arranged about the center line, so that the coolant can be evenly distributed in the liquid inlet flow paths 141. Since the multiple liquid inlet flow paths 141 are arranged in a one-to-one correspondence with the multiple inlets 23, accordingly, the multiple inlets 23 are symmetrically arranged about the center line, so that the coolant can enter evenly.

[0075] Furthermore, combined with Figure 3 and Figure 5 As shown, the liquid guide groove 143 includes a first sub-groove 144 and a second sub-groove 145, and the first sub-groove 144 and the second sub-groove 145 are spaced apart in the circumferential direction of the stator outer ring portion 113, and the first sub-groove 144 and the second sub-groove 145 are symmetrical about the center line, and the multiple inlets 23 located on one side of the center line are arranged on the inner wall of the first sub-groove 144, and the multiple inlets 23 located on the other side of the center line are arranged on the inner wall of the second sub-groove 145.

[0076] Among them, the first sub-groove 144 and the second sub-groove 145 are spaced apart in the circumferential direction of the stator outer ring portion 113, which can facilitate the collection of more coolant, and the first sub-groove 144 and the second sub-groove 145 are symmetrical about the center line, which can evenly collect the coolant and prevent the coolant from splashing.

[0077] In addition, the inner wall of the first sub-groove 144 is provided with a plurality of inlets 23 , and the inner wall of the second sub-groove 145 is also provided with a plurality of inlets 23 , so that the coolant can enter from different directions and the speed at which the coolant enters the liquid inlet path 141 can be accelerated.

[0078] Specifically, the shape of the annular flow path 142 is one of a circular ring, an elliptical ring, and a polygonal ring.

[0079] For example, the shape of the annular flow path 142 can be set to a circular ring with different diameters, or it can be set to an elliptical ring, or it can be set to a polygonal ring, wherein the polygonal ring can be a quadrilateral ring, a pentagonal ring, or a hexagonal ring, etc. The shape of the annular flow path 142 can be set according to the size of the excitation rotor housing 16.

[0080] For another example, the shape of the annular flow path 142 may be a combination of two or more of a circular ring, an elliptical ring and a polygonal ring, so that the coolant in the annular flow path 142 can be cooled and dissipated through flow paths of different shapes. The annular flow paths 142 of different shapes have different distances, and the annular flow path 142 with a longer distance can further improve the cooling efficiency of the excitation rotor core 17.

[0081] Furthermore, combined with Figure 3 and Figure 4 As shown, the excitation cooling branch 14 further includes a liquid outlet passage 146 , which is disposed on the stator disc 114 and extends radially of the stator disc 114 , and an outlet 40 communicating with the liquid outlet passage 146 is disposed at the bottom of the outer circumferential surface of the stator outer ring portion 113 .

[0082] Among them, the liquid outlet oil circuit is arranged below the stator disk body 114, which can facilitate the coolant to flow out from the bottom of the stator disk body 114, and the coolant in the liquid outlet oil circuit flows out radially through the outlet 40, so that the outflow speed of the coolant can be accelerated, and the circulation of the coolant can also be accelerated, thereby improving the cooling efficiency.

[0083] Specifically, combined Figure 3-Figure 5 As shown, the excitation stator housing 111 has a center line perpendicular to its axial direction and extending in the up-down direction, there are multiple liquid outlet flow paths 146, and the liquid outlet flow paths 146 are symmetrically arranged about the center line, there are multiple outlets 40, and the outlets 40 are symmetrically arranged about the center line, and the multiple outlets 40 are connected to the multiple liquid outlet flow paths 146 in a one-to-one correspondence. Among them, the arrangement of multiple liquid outlet flow paths 146 can further speed up the outflow speed of the coolant, and the liquid outlet flow paths 146 are symmetrically arranged about the center line, so that the liquid outlet flow paths 146 can flow out evenly through the outlets 40.

[0084] According to some optional embodiments of the present invention, the shape of the excitation cooling branch 14 is spiral. For example, the excitation cooling branch 14 can be set to a spiral shape, so that the excitation cooling branch 14 can form an integral circulation flow path, and the area of ​​the excitation cooling branch 14 can be increased, so as to further improve the cooling efficiency of the excitation cooling branch 14 on the excitation stator core 112.

[0085] According to some optional embodiments of the present invention, combined with Figure 2 and Figure 7 As shown, the excitation stator component 11 further includes an excitation stator winding 115 , which is disposed on the excitation stator core 112 , and a first filling member is filled between the excitation stator winding 115 and the excitation stator core 112 .

[0086] Optionally, the first filling member can be epoxy resin. Epoxy resin has a high heat transfer efficiency. The epoxy resin is filled between the excitation stator winding 115 and the excitation stator core 112. This can increase the heat dissipation speed of the excitation stator winding 115 and facilitate the transfer of heat from the excitation stator winding 115 to the excitation stator core 112, so that the heat can be taken away by the coolant, and the stiffness of the excitation stator component 11 can be further improved.

[0087] Combination Figure 7 As shown, the excitation unit 10 according to the embodiment of the second aspect of the utility model includes the excitation stator component 11 of the above embodiment.

[0088] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 7 As shown, the excitation unit 10 further includes an excitation rotor component 12 . The excitation rotor component 12 and the excitation stator component 11 are spaced apart from each other in the axial direction of the motor, and an air gap 13 is formed between the excitation rotor component 12 and the excitation stator component 11 .

[0089] Specifically, the excitation rotor component 12 is in transmission connection with the rotating shaft of the motor, and the excitation rotor component 12 rotates synchronously with the rotating shaft, and the excitation stator component 11 is loosely sleeved on the rotating shaft of the motor, so that the excitation stator component 11 is not in transmission connection with the rotating shaft of the motor, and the rotating shaft of the motor only provides a certain support for the excitation stator component 11. When the excitation rotor component 12 rotates with the rotating shaft, since the excitation rotor component 12 and the excitation stator component 11 are spaced apart in the axial direction of the motor, interference between the excitation rotor component 12 and the excitation stator component 11 can be avoided.

[0090] Furthermore, an air gap 13 is formed between the excitation rotor component 12 and the excitation stator component 11. When an alternating current is passed through one side of the excitation stator component 11 to generate an alternating magnetic field, the energy is transferred to the excitation rotor component 12 through the air gap 13. In this way, an alternating current is induced in the excitation rotor component 12, thereby realizing wireless energy transmission.

[0091] In addition, the main coolant outlet 31 is oriented toward at least one of the excitation stator component 11, the excitation rotor component 12, and the air gap 13, that is, the main coolant outlet 31 may be oriented toward one of the excitation stator component 11, the excitation rotor component 12, and the air gap 13, or may be oriented toward two of the excitation stator component 11, the excitation rotor component 12, and the air gap 13, or the excitation stator component 11, the excitation rotor component 12, and the air gap 13 may all be arranged corresponding to the main coolant outlet 31. In this way, the coolant may directly cool the excitation stator component 11, or may cool the excitation rotor component 12, or the coolant may directly cool the excitation stator component 11, the excitation rotor component 12, and the air gap 13.

[0092] Specifically, combined Figure 1 As shown, the excitation rotor component 12 includes an excitation rotor housing 16, an excitation rotor core 17 and an excitation rotor winding 15. The excitation rotor core 17 is arranged on the excitation rotor housing 16, the excitation rotor winding 15 is arranged on the excitation rotor core 17, and a second filling piece is arranged between the excitation rotor winding 15 and the excitation rotor core 17.

[0093] It can be understood that the excitation rotor housing 16 provides an installation space for the excitation rotor core 17, and the second filling member can be epoxy resin, which is filled between the excitation rotor winding 15 and the excitation rotor core 17. This can increase the heat dissipation speed of the excitation rotor winding 15, and facilitate the transfer of heat from the excitation rotor winding 15 to the excitation rotor core 17, so that the heat can be taken away by the coolant, and the stiffness of the excitation rotor component 12 can be further improved.

[0094] Furthermore, combined with Figure 1 , Figure 2 and Figure 6 As shown, the excitation rotor component 12 also includes a circuit board 18; the excitation rotor housing 16 includes a rotor outer ring portion 161 and a rotor disk body 162, the rotor disk body 162 surrounds the outer peripheral side of the inner ring portion, and the excitation rotor core 17 is arranged on the rotor disk body 162; wherein, the portion of the rotor outer ring portion 161 that extends beyond the rotor disk body 162 toward the excitation rotor component 12 surrounds a first accommodating groove 163, and the portion of the rotor outer ring portion 161 that extends beyond the rotor disk body 162 away from the excitation rotor component 12 surrounds a second accommodating groove 164, the excitation rotor core 17 is arranged in the first accommodating groove 163, and the circuit board 18 is arranged in the second accommodating groove 164.

[0095] Among them, a part of the outer ring portion extending toward the excitation stator component 11 on one side is formed with a first accommodating groove 163, and the first accommodating groove 163 can provide an installation space for the excitation rotor core 17, and a part of the outer ring portion extending away from the excitation stator component 11 on the other side is formed with a second accommodating groove 164, and the second accommodating groove 164 can provide an installation space for the circuit board 18.

[0096] In addition, the circuit board 18 is integrated on the excitation rotor housing 16 and is fixed by fixing bolts passing through the through holes, so that the heat generated by the electrical components on the circuit board 18 during operation can be dissipated.

[0097] Specifically, combined Figure 1 , Figure 2 and Figure 6 As shown, the first receiving groove 163 and / or the second receiving groove 164 are filled with a third filling member. For example, the third filling member may be an epoxy resin with high heat transfer efficiency. The epoxy resin may be filled in the first receiving groove 163 to increase the heat dissipation rate of the excitation rotor core 17 in the first receiving groove 163, or the epoxy resin may be filled in the second receiving groove 164 to increase the heat dissipation rate of the circuit board 18 in the second receiving groove 164. The first receiving groove 163 and the second receiving groove 164 may be filled with epoxy resin. In this way, the heat dissipation rate of the excitation rotor component 12 may be further improved, and the rigidity of the excitation rotor component 12 may also be increased.

[0098] The electrically excited synchronous motor according to the third aspect of the present invention comprises the excitation unit 10 of the motor of the above embodiment, so that the motor having the excitation unit can avoid the risk of overheating damage, thereby extending its service life.

[0099] Among them, the excitation rotor housing 16 and the excitation stator housing 111 can both be designed to be H-shaped. This housing is made of magnetically isolating aluminum material, which can avoid electromagnetic interference caused by the motor. It can also be made of other non-magnetic materials, such as iron. Moreover, the housing has a large contact area with the outside world, which can facilitate heat dissipation.

[0100] Specifically, the motor further includes a cooling pipe 30, and the cooling pipe 30 is provided with a main coolant outlet 31, and the main coolant outlet 31 is arranged toward the excitation unit 10, so that the coolant in the cooling pipe 30 can be transported to the excitation unit 10. The coolant can be oil.

[0101] It is understandable that the cooling system of the excitation unit of a traditional motor mainly relies on air cooling to dissipate heat from the excitation unit housing. This cooling method cannot directly cool the circuit board, magnetic core, and winding inside the excitation unit, which results in a low cooling efficiency. Due to the low cooling efficiency, the motor may be damaged by overheating, which affects the service life of the motor.

[0102] Therefore, the motor is mainly composed of an excitation unit 10 and a cooling pipe 30. The coolant in the cooling pipe 30 can flow out through the main coolant outlet 31. Moreover, the main coolant outlet 31 is arranged toward the excitation unit 10, so that the coolant in the cooling pipe 30 can flow to the excitation unit 10. In this way, the coolant in the cooling pipe 30 can directly cool the excitation unit 10, thereby improving the cooling efficiency of the coolant in the cooling pipe 30 on the excitation unit 10.

[0103] Furthermore, if Figure 7 As shown, the cooling pipe 30 is located on the outer peripheral side of the excitation unit 10, and the cooling pipe 30 is spaced apart from the excitation unit 10. The cooling pipe 30 is arranged around the outer peripheral side of the excitation unit 10, and can cool the excitation unit 10 in all directions, thereby preventing the local temperature of the excitation unit 10 from being too high. Moreover, during operation, a part of the excitation unit 10 rotates, and the cooling pipe 30 is spaced apart from the excitation unit 10, thereby preventing interference between the cooling pipe 30 and the excitation unit 10.

[0104] Furthermore, if Figure 1 As shown, there are a plurality of cooling pipes 30 , each of which extends along the axial direction of the excitation unit 10 , and the plurality of cooling pipes 30 are arranged at intervals in the circumferential direction of the excitation unit 10 .

[0105] Among them, the excitation unit 10 is sleeved on the rotating shaft of the motor, and a rotor is also arranged on the rotating shaft. Since the cooling pipe 30 extends along the axial direction of the excitation unit 10, the coolant in the cooling pipe 30 can not only flow to the excitation unit 10, but also flow to the rotor, stator and other electronic components on the rotating shaft. In this way, the coolant in the cooling pipe 30 can cool the electronic components on the rotating shaft of the motor that need heat dissipation, thereby improving the utilization efficiency of the cooling pipe 30.

[0106] In addition, multiple cooling pipes 30 are arranged at intervals in the circumferential direction of the excitation unit 10, which can increase the cooling speed of the excitation unit 10 and realize cooling of the excitation unit 10 in different directions, so that the temperature of the excitation unit 10 in all directions can be more uniform.

[0107] In particular, if Figure 7 As shown, the multiple cooling pipes 30 are higher than the central axis of the excitation unit 10. The multiple cooling pipes 30 are located above the central axis of the excitation unit 10. Due to the effect of fluid pressure and gravity, the coolant in the cooling pipes 30 can quickly flow to the excitation unit 10, thereby ensuring that the excitation unit 10 has enough coolant to achieve the purpose of cooling.

[0108] Alternatively, if Figure 7 As shown, in a plane perpendicular to the axial direction of the excitation unit 10 , the angle α between the orthographic projections of the central axes of two adjacent cooling pipes 30 and the line connecting the orthographic projections of the central axis of the excitation unit 10 satisfies: 30°≤α≤60°.

[0109] The angle between the orthographic projection of the central axis of two adjacent cooling pipes 30 and the line connecting the orthographic projection of the central axis of the excitation unit 10 is in the range of 30° to 60°, so that the coolant of the two adjacent cooling pipes 30 can be evenly sprayed onto the excitation unit 10, thereby achieving uniform heat dissipation of the excitation unit 10. For example, α can be 30°, 45°, and 60°.

[0110] Alternatively, if Figure 6 As shown, the main coolant outlet 31 is directed toward at least one of the excitation stator component 11, the excitation rotor component 12, and the air gap 13. That is, the main coolant outlet 31 may be directed toward one of the excitation stator component 11, the excitation rotor component 12, and the air gap 13, or may be directed toward two of the excitation stator component 11, the excitation rotor component 12, and the air gap 13, or the excitation stator component 11, the excitation rotor component 12, and the air gap 13 are all arranged corresponding to the main coolant outlet 31. In this way, the coolant may directly cool the excitation stator component 11, or may cool the excitation rotor component 12, or the coolant may directly cool the excitation stator component 11, the excitation rotor component 12, and the air gap 13.

[0111] Alternatively, if Figure 7 As shown, there are multiple main coolant outlets 31 , wherein at least one main coolant outlet 31 faces the excitation stator component 11 , at least one main coolant outlet 31 faces the excitation rotor component 12 , and at least one main coolant outlet 31 faces the air gap 13 .

[0112] That is, the multiple main coolant outlets 31 are directed toward the excitation stator component 11, and the multiple main coolant outlets 31 can cool the excitation stator component 11 at the same time, thereby further improving the heat dissipation rate of the excitation stator component 11. Similarly, the multiple main coolant outlets 31 are directed toward the excitation rotor component 12, which can further improve the heat dissipation rate of the excitation rotor component 12, and the multiple main coolant outlets 31 are arranged toward the air gap 13, which can further improve the heat dissipation rate at the air gap 13.

[0113] Furthermore, if Figure 7 As shown, a plurality of main coolant outlets 31 are arranged in rows in the cooling pipe 30, and the plurality of rows of main coolant outlets 31 are spaced apart in the length direction of the cooling pipe 30, and each row of main coolant outlets 31 has at least two main coolant outlets 31 spaced apart in the circumferential direction of the cooling pipe 30, and the main coolant outlets 31 in different rows are respectively oriented toward the excitation stator component 11, the excitation rotor component 12 and the air gap 13.

[0114] For example, the number of cooling pipes 30 can be three, and correspondingly, the multiple main coolant outlets 31 on the cooling pipe 30 are also formed in three rows, and the main coolant outlets 31 in each row are spaced apart in the length direction of the cooling pipe 30, so that it is convenient to cool the corresponding excitation stator component 11, excitation rotor component 12 and air gap 13 below the main coolant outlets 31.

[0115] Optionally, each row of cooling pipes 30 has at least two main coolant outlets 31 spaced apart in the circumferential direction, so that the corresponding excitation stator component 11, excitation rotor component 12 and air gap 13 below the main coolant outlets 31 can be evenly cooled and dissipated, and the coolant can be sprayed to different positions of the corresponding excitation stator component 11, excitation rotor component 12 and air gap 13, thereby ensuring that the excitation stator component 11, excitation rotor component 12 and air gap 13 are at a suitable operating temperature.

[0116] In particular, if Figure 8 As shown, in each row of main coolant outlets 31 , the angle between the central axes of two adjacent main coolant outlets 31 is β, and β satisfies: 30°≤β≤90°.

[0117] It can be understood that the angle between the central axes of two adjacent main coolant outlets 31 ranges from 30° to 90°, so that the angle between the central axes of the two adjacent main coolant outlets 31 can be adjusted according to the flow direction of the coolant of the two adjacent main coolant outlets 31, thereby ensuring that the excitation unit 10 can be cooled by the coolant in all directions. For example, β can be 30°, 60° and 90°.

[0118] Specifically, Figure 3 and Figure 7 As shown, the excitation stator component 11 is configured with an excitation cooling branch 14, and the main coolant outlet 31 faces the excitation cooling branch 14. The main coolant outlet 31 faces the excitation cooling branch 14, and the coolant of the main coolant outlet 31 can flow into the excitation cooling branch 14, so that the excitation cooling branch 14 can directly cool and dissipate heat for the excitation stator component 11, thereby reducing the temperature of the excitation stator component 11.

[0119] The drive assembly according to the fourth aspect of the present invention includes the electrically excited synchronous motor of the above embodiment. The drive assembly having the electrically excited synchronous motor can improve the heat dissipation efficiency of the electrically excited synchronous motor, thereby improving the power performance of the drive assembly.

[0120] The vehicle according to the fifth aspect of the present invention includes the drive assembly or the electrically excited synchronous motor of the above-mentioned embodiment, so that the vehicle with the drive assembly or the electrically excited synchronous motor can improve the user's driving experience.

[0121] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0122] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0123] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0124] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An excitation stator component, characterized in that: include: Excitation stator housing; An excitation stator core, wherein the excitation stator core is arranged on the excitation stator housing; Wherein, the excitation stator housing is provided with an excitation cooling branch, and the excitation cooling branch is used to cool the excitation stator core.

2. The excitation stator component according to claim 1, characterized in that: The excitation stator housing is provided with a stator cooling outlet communicated with the excitation cooling branch, and the stator cooling outlet is communicated with the excitation stator core.

3. The excitation stator component according to claim 2, characterized in that: The excitation stator housing comprises: stator outer ring; A stator disc body, wherein the stator disc body is arranged on the inner circumference side of the stator outer ring portion, and the excitation stator core is arranged on the stator disc body and surrounded by the stator outer ring portion; The excitation cooling branch has an inlet, which is located on the outer peripheral surface of the stator outer ring portion, and the coolant enters the excitation cooling branch through the inlet.

4. The excitation stator component according to claim 3, characterized in that: The excitation cooling branch comprises: A liquid inlet flow path, the liquid inlet flow path is provided on the stator disc body and extends along the radial direction of the stator disc body, the inlet penetrates the thickness direction of the stator outer ring part and communicates with the liquid inlet flow path; An annular flow path is provided on the stator disc body and extends along the circumference of the stator disc body, and the annular flow path is communicated with the liquid inlet flow path.

5. The excitation stator component according to claim 4, characterized in that: The plurality of liquid inlet flow paths are arranged at intervals along the circumference of the stator disc body, the plurality of inlets are arranged at intervals along the circumference of the outer circumference of the stator outer ring portion, the plurality of inlets are connected to the plurality of liquid inlet flow paths in a one-to-one correspondence, and each of the liquid inlet flow paths is connected to the annular flow path; and / or There are a plurality of annular flow paths which are arranged at intervals along the radial direction of the stator disk body, and each of the annular flow paths is communicated with the liquid inlet flow path.

6. The excitation stator component according to claim 4, characterized in that: A side of the annular flow path facing the excitation stator core is open to form a first stator cooling outlet; and / or The side of the liquid inlet flow path facing the excitation stator core is open to form a second stator cooling outlet.

7. The excitation stator component according to claim 4, characterized in that: The excitation cooling branch also includes: The liquid-conducting groove is arranged on the outer peripheral surface of the stator outer ring portion and extends along the circumferential direction of the stator outer ring portion, and the plurality of inlets are arranged on the inner wall of the liquid-conducting groove.

8. The excitation stator component according to claim 7, characterized in that: The inlet is opened on the inner side wall of the liquid guiding groove on one side adjacent to the stator disc body.

9. The excitation stator component according to claim 7, characterized in that: The excitation stator housing has a center line perpendicular to its axial direction and extending in the up-down direction. The liquid inlet flow paths are multiple and symmetrically arranged about the center line. The inlets are multiple and symmetrically arranged about the center line.

10. The excitation stator component according to claim 9, characterized in that: The liquid guiding groove comprises: A first sub-slot and a second sub-slot, wherein the first sub-slot and the second sub-slot are spaced apart in the circumferential direction of the stator outer ring portion and are symmetrical about the center line, a plurality of the inlets located on one side of the center line are arranged on the inner wall of the first sub-slot, and a plurality of the inlets located on the other side of the center line are arranged on the inner wall of the second sub-slot.

11. The excitation stator component 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.

12. The excitation stator component according to claim 4, characterized in that: The excitation cooling branch also includes: A liquid outlet flow path is provided on the stator disc body and extends in the radial direction of the stator disc body. An outlet communicating with the liquid outlet flow path is provided at the bottom of the outer peripheral surface of the stator outer ring portion.

13. The excitation stator component according to claim 12, characterized in that: The excitation stator housing has a center line perpendicular to its axial direction and extending in the up-down direction, the liquid outlet flow paths are multiple and symmetrically arranged about the center line, the outlets are multiple and symmetrically arranged about the center line, and the multiple outlets are connected to the multiple liquid outlet flow paths in a one-to-one correspondence.

14. The excitation stator component according to claim 1, characterized in that: The excitation cooling branch is in a spiral shape.

15. The excitation stator component according to claim 1, characterized in that: The excitation stator component also includes: The excitation stator winding is arranged on the excitation stator core, and a first filling piece is filled between the excitation stator winding and the excitation stator core.

16. An excitation unit, characterized in that: include: The excitation stator component according to any one of claims 1 to 15.

17. The excitation unit according to claim 16, characterized in that: Also includes: The excitation rotor component is spaced apart from the excitation stator component in the axial direction of the motor, and an air gap is formed between the excitation rotor component and the excitation stator component.

18. The excitation unit according to claim 17, characterized in that: The excitation rotor component comprises: Excitation rotor housing; An excitation rotor core, wherein the excitation rotor core is arranged on the excitation rotor housing; The excitation rotor winding is arranged on the excitation rotor core, and a second filling piece is arranged between the excitation rotor winding and the excitation rotor core.

19. The excitation unit according to claim 18, characterized in that: The excitation rotor component also includes a circuit board; The excitation rotor housing comprises: The outer ring of the rotor; A rotor disc body, the rotor disc body surrounds the outer peripheral side of the inner ring portion, and the excitation rotor core is arranged on the rotor disc body; The portion of the rotor outer ring portion that extends beyond the rotor disk body and faces the excitation rotor component surrounds a first accommodating groove, and the portion of the rotor outer ring portion that extends beyond the rotor disk body and faces away from the excitation rotor component surrounds a second accommodating groove. The excitation rotor core is arranged in the first accommodating groove, and the circuit board is arranged in the second accommodating groove.

20. The excitation unit according to claim 19, characterized in that: The first accommodating groove and / or the second accommodating groove is filled with a third filling member.

21. An electrically excited synchronous motor, characterized in that: include: An excitation unit for a motor according to any one of claims 1 to 20.

22. A drive assembly, characterized in that: include: The electrically excited synchronous motor as claimed in claim 21.

23. A vehicle, characterized in that: include: The drive assembly of claim 22 or the electrically excited synchronous motor of claim 21.

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