Linear electric motor, electromagnetic suspension, and vehicle

Abstract

A linear electric motor, an electromagnetic suspension, and a vehicle. The linear electric motor comprises: a primary assembly, which comprises a mandrel and a winding assembly sleeved on the mandrel, wherein the mandrel comprises a mandrel wall and a first chamber enclosed by the mandrel wall, and a cooling water channel is provided in the mandrel wall; and a conductive assembly, which is disposed in the first chamber and electrically connected to the winding assembly and an electric motor controller, respectively.

Description

Linear motors, electromagnetic suspension, and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 2024103850961 and application date of March 29, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of vehicle technology, and in particular to a linear motor, an electromagnetic suspension, and a vehicle. Background Art

[0004] In the related art, a separate pipe is usually set inside the stator core shaft to form a cooling water channel, and the sealing of the pipe cannot be guaranteed, and there is a risk of leakage, which makes the safety of the linear motor unable to be guaranteed.

[0005] Application Contents

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a linear motor having a simple structure and good sealing performance of the cooling water channel, thereby improving the safety of the linear motor.

[0007] The linear motor according to the present application includes: a primary component, the primary component includes a core shaft and a winding component externally mounted on the core shaft, the core shaft includes a shaft wall and a first chamber surrounded by the shaft wall, a cooling water channel is provided in the shaft wall; a conductive component is provided in the first chamber, one end of the conductive component is connected to the winding component, and the other end of the conductive component is suitable for being electrically connected to a motor controller.

[0008] According to the linear motor of the present application, the cooling water channel and the conductive component are both arranged in the core shaft, which is conducive to improving the space utilization in the core shaft, making the structure of the core shaft more compact, and is conducive to realizing the miniaturized design of the linear motor. The cooling water channel is formed by the shaft wall of the core shaft, which improves the integration of the core shaft, and does not require the arrangement of additional pipelines, which is conducive to realizing the lightweight design of the linear motor and can simplify the components of the linear motor. At the same time, the cooling water channel has good sealing performance, which can effectively prevent leakage problems in the cooling water channel, improve the isolation effect between the conductive component and the coolant, and improve the safety of the linear motor. In addition, the coolant can exchange heat with the conductive component and the winding component at the same time, thereby improving the heat dissipation effect of the conductive component and the winding component.

[0009] According to some embodiments of the present application, the cooling water channel is provided with a liquid inlet and a liquid outlet.

[0010] According to some embodiments of the present application, the liquid inlet and the liquid outlet are located on the same end surface of the core shaft.

[0011] According to some embodiments of the present application, the cooling water channel includes a first cooling channel and a second cooling channel, the first cooling channel is used for heat exchange with the conductive component, and the second cooling channel is used for heat exchange with the winding component.

[0012] According to some embodiments of the present application, the core shaft includes a first shaft segment and a second shaft segment, the shaft diameter of the first shaft segment is larger than the shaft diameter of the second shaft segment, the conductive component is arranged in the first shaft segment, and the winding component is arranged in the second shaft segment; the first cooling channel is arranged in the first shaft segment, and the second cooling channel is arranged in the second shaft segment.

[0013] According to some embodiments of the present application, the first cooling channel and the second cooling channel are in communication.

[0014] According to some embodiments of the present application, the first cooling channel includes a first water inlet section and a first water outlet section, the second cooling channel includes multiple second water inlet sections and multiple second water outlet sections, one end of the first water inlet section is connected to the first ends of the multiple second water inlet sections, the second ends of the multiple second water inlet sections are connected to the first ends of the multiple second water outlet sections, and the second ends of the multiple second water outlet sections are connected to the first water outlet section.

[0015] According to some embodiments of the present application, the central angles corresponding to the circumferential ends of multiple second water inlet sections are greater than the central angles corresponding to the circumferential ends of multiple second water outlet sections; and / or, the central angles corresponding to the circumferential ends of multiple second water outlet sections are greater than the central angles corresponding to the circumferential ends of multiple second water outlet sections.

[0016] According to some embodiments of the present application, a water inlet merging section is provided between the first water inlet section and the plurality of second water inlet sections, and the first water inlet section is circumferentially close to one side of the water inlet merging section; and / or a water outlet merging section is provided between the first water outlet section and the plurality of second water outlet sections, and the first water outlet section is circumferentially close to one side of the water outlet merging section.

[0017] According to some embodiments of the present application, a first rib is provided between two adjacent second water inlet sections; and / or a second rib is provided between two adjacent second water outlet sections; and / or a third rib is provided between adjacent second water inlet sections and second water outlet sections.

[0018] According to some embodiments of the present application, a first positioning portion is provided in the first cavity, and the conductive component is provided with a first positioning matching portion, and the first positioning portion and the first positioning matching portion are positioned and matched to limit the circumferential rotational freedom of the conductive component.

[0019] According to some embodiments of the present application, one of the first positioning portion and the first positioning matching portion is configured as a positioning protrusion, and the other is configured as a positioning groove.

[0020] According to some embodiments of the present application, a fixing protrusion is provided at the end of the first chamber, and the linear motor includes a first fixing connector, which is fixed to the conductive component through the fixing protrusion.

[0021] According to some embodiments of the present application, the fixing protrusion and the core shaft are an integrally formed part.

[0022] According to some embodiments of the present application, the lead wires of the winding assembly are located radially outside the core shaft; the linear motor also includes an electrical connector, a connecting hole is formed on the shaft wall of the core shaft, and the electrical connector is passed through the connecting hole and is electrically connected to the lead wires and the conductive assembly respectively.

[0023] According to some embodiments of the present application, the communicating hole is located at the bottom of the first chamber.

[0024] According to some embodiments of the present application, the linear motor further includes: a secondary component coupled to the primary component, the secondary component being movable relative to the primary component; and a detection device for detecting a position of the secondary component.

[0025] According to some embodiments of the present application, the detection device includes a sensing member and a reading head, the sensing member is provided on the core shaft, the reading head is provided on the secondary component, and the reading head is coupled to the sensing member to detect the position of the secondary component.

[0026] According to some embodiments of the present application, a placement groove is provided on the outer peripheral wall of the core shaft, and the sensing component is placed in the placement groove.

[0027] According to some embodiments of the present application, the placement groove and the cooling water channel are staggered.

[0028] Another object of the present application is to provide an electromagnetic suspension.

[0029] An electromagnetic suspension comprises the above-mentioned linear motor.

[0030] The electromagnetic suspension has the same advantages as the above-mentioned linear motor, which will not be described in detail here.

[0031] Yet another object of the present application is to provide a vehicle.

[0032] A vehicle comprises the electromagnetic suspension described above.

[0033] The advantages of the vehicle are the same as those of the above-mentioned electromagnetic suspension, which will not be described in detail here.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] FIG1 is a cross-sectional view of the primary assembly and the conductive assembly according to an embodiment of the present application after being matched;

[0037] FIG2 is a second cross-sectional view of the primary assembly and the conductive assembly after being mated according to an embodiment of the present application;

[0038] FIG3 is a structural schematic diagram 1 of the core shaft according to an embodiment of the present application;

[0039] FIG4 is a second structural diagram of the core shaft according to an embodiment of the present application;

[0040] FIG5 is a third structural diagram of the mandrel according to an embodiment of the present application;

[0041] FIG6 is an axial cross-sectional view 1 of the core shaft according to an embodiment of the present application;

[0042] FIG7 is a second axial cross-sectional view of the core shaft according to an embodiment of the present application;

[0043] FIG8 is an enlarged view of point A in FIG7 ;

[0044] FIG9 is a fourth structural diagram of the mandrel according to an embodiment of the present application;

[0045] FIG10 is a cross-sectional view taken along line BB of FIG9 ;

[0046] FIG11 is a cross-sectional view taken along CC in FIG9 ;

[0047] FIG12 is a cross-sectional view of FIG9 at DD;

[0048] FIG13 is a first model diagram of a cooling water channel according to an embodiment of the present application;

[0049] FIG14 is a second model diagram of the cooling water channel according to an embodiment of the present application;

[0050] FIG15 is a third model diagram of the cooling water channel according to an embodiment of the present application;

[0051] FIG16 is a first structural diagram of a conductive assembly according to an embodiment of the present application;

[0052] FIG17 is a second structural diagram of the conductive assembly according to an embodiment of the present application;

[0053] FIG18 is a third structural diagram of a conductive assembly according to an embodiment of the present application;

[0054] FIG19 is a fourth structural diagram of a conductive assembly according to an embodiment of the present application;

[0055] FIG20 is a fifth structural diagram of a conductive assembly according to an embodiment of the present application;

[0056] FIG21 is a schematic diagram of a vehicle according to an embodiment of the present application.

[0057] Reference numerals:

[0058] Vehicle 10000, electromagnetic suspension 1000, linear motor 100, primary assembly 1, core shaft 11, shaft wall 111, first chamber 112, first shaft segment 113, second shaft segment 114, placement groove 115, first rib 116, second rib 117, third rib 118, winding assembly 12, lead wire 121,

[0059] Cooling water channel 13, liquid inlet 131, liquid outlet 132,

[0060] The first cooling channel 133, the first water inlet section 1331, the first water outlet section 1332,

[0061] The second cooling channel 134, the second water inlet section 1341, the second water outlet section 1342, the connecting section 135, the flow guide section 136, the water inlet merging section 137, the water outlet merging section 138,

[0062] First positioning portion 14, fixing protrusion 15, connecting hole 16, outlet hole 17,

[0063] Conductive component 2, first positioning matching portion 21, connecting portion 22, connecting groove 23, avoiding groove 24,

[0064] First fixed connector 3, electrical connector 4, electrical control connector 5,

[0065] Induction element 61. DETAILED DESCRIPTION

[0066] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0067] In the description of this application, it should be understood that the terms "center", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0069] The linear motor 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 20 .

[0070] In combination with Figures 1 and 2, the linear motor 100 according to the present application includes: a primary component 1 and a conductive component 2, the primary component 1 includes a core shaft 11 and a winding component 12 externally mounted on the core shaft 11, the core shaft 11 includes a shaft wall 111 and a first chamber 112 surrounded by the shaft wall 111, and a cooling water channel 13 is provided in the shaft wall 111; the conductive component 2 is provided in the first chamber 112, one end of the conductive component 2 is connected to the winding component 12, and the other end of the conductive component 2 is suitable for being electrically connected to the motor controller.

[0071] Specifically, a first chamber 112 is formed in the core shaft 11, and the first chamber 112 can be used to install the conductive component 2. The winding component 12 is sleeved on the radial outside of the core shaft 11. One axial end of the conductive component 2 can be electrically connected to the winding component 12, and the other axial end of the conductive component 2 can be electrically connected to the motor controller.

[0072] A cooling water channel 13 is provided in the shaft wall 111 of the core shaft 11, that is, the cooling water channel 13 is defined and formed by the shaft wall 111 of the core shaft 11. The cooling water channel 13 is arranged adjacent to the conductive component 2, and the cooling water channel 13 is filled with coolant. The coolant can exchange heat with the conductive component 2 to improve the heat dissipation effect of the conductive component 2, and the coolant can also exchange heat with the winding component 12 at the same time to ensure the heat dissipation effect of the winding component 12.

[0073] Since the cooling water channel 13 and the conductive component 2 are both arranged in the core shaft 11, it is beneficial to improve the space utilization of the core shaft 11, making the structure of the core shaft 11 compact, which is beneficial to the miniaturization design of the core shaft 11. In addition, since the cooling water channel 13 is formed by the shaft wall 111 of the core shaft 11, there is no need to set additional pipes on the core shaft 11, which is beneficial to the lightweight design of the linear motor 100. The cooling water channel 13 has good sealing performance, which can effectively prevent leakage of the cooling water channel 13, improve the isolation effect between the conductive component 2 and the coolant, and improve the safety of the linear motor 100.

[0074] According to the linear motor 100 of the present application, the cooling water channel 13 and the conductive component 2 are both arranged in the core shaft 11, which is conducive to improving the space utilization in the core shaft 11, making the structure of the core shaft 11 more compact, and is conducive to realizing the miniaturization design of the linear motor 100. The cooling water channel 13 is formed by the shaft wall 111 of the core shaft 11, which improves the integration of the core shaft 11, and does not require the arrangement of additional pipelines, which is conducive to realizing the lightweight design of the linear motor 100 and can simplify the components of the linear motor 100. At the same time, the cooling water channel 13 has good sealing performance, which can effectively prevent the cooling water channel 13 from leaking, improve the isolation effect between the conductive component 2 and the coolant, and improve the safety of the linear motor 100. In addition, the coolant can exchange heat with the conductive component 2 and the winding component 12 at the same time, thereby improving the heat dissipation effect of the conductive component 2 and the winding component 12.

[0075] 5 , 6 and 7 , in some embodiments of the present application, the cooling water channel 13 is provided with a liquid inlet 131 and a liquid outlet 132 .

[0076] Specifically, the cooling water channel 13 is provided with a liquid inlet 131 and a liquid outlet 132. The liquid inlet 131 and the liquid outlet 132 are used to be connected to the whole vehicle cooling circuit of the vehicle 10000, so that a closed cooling circulation loop can be formed between the cooling water channel 13 and the whole vehicle cooling circuit. The coolant can flow into the cooling water channel 13 from the whole vehicle cooling circuit through the liquid inlet 131 and circulate in the cooling water channel 13, thereby absorbing the heat of the winding assembly 12 and the conductive assembly 2 to achieve the heat dissipation function of the winding assembly 12 and the conductive assembly 2. The coolant after absorbing heat can flow out of the cooling water channel 13 through the liquid outlet 132.

[0077] As shown in FIG. 5 , in some embodiments of the present application, the liquid inlet 131 and the liquid outlet 132 are located on the same end surface of the core shaft 11 .

[0078] Specifically, the liquid inlet 131 and the liquid outlet 132 are located on the same end face of the core shaft 11, so that the liquid inlet 131 and the liquid outlet 132 are connected to the cooling circuit of the entire vehicle, wherein the liquid inlet 131 and the liquid outlet 132 can be arranged at the end of the core shaft 11 away from the winding assembly 12 in the axial direction, and the end of the core shaft 11 away from the winding assembly 12 in the axial direction has an installation space, which is convenient for the setting of the sealing structure. By setting the sealing structure, the liquid inlet 131 and the liquid outlet 132 are sealed from the cooling circuit of the entire vehicle to prevent leakage at the connection between the liquid inlet 131 and the liquid outlet 132 and the cooling circuit of the entire vehicle.

[0079] In combination with Figures 1, 5, 6, 7 and 13, in some embodiments of the present application, the cooling water channel 13 includes a first cooling channel 133 and a second cooling channel 134, the first cooling channel 133 is used for heat exchange with the conductive component 2, and the second cooling channel 134 is used for heat exchange with the winding component 12.

[0080] Specifically, the first cooling channel 133 is arranged opposite to the conductive component 2 in the radial direction, and the coolant in the first cooling channel 133 can exchange heat with the conductive component 2 to dissipate heat for the conductive component 2; the second cooling channel 134 is arranged opposite to the winding component 12 in the radial direction, and the second cooling channel 134 is located on the radial inner side of the winding component 12, and the second cooling channel 134 can exchange heat with the winding component 12 on the inner side of the winding component 12 to dissipate heat for the winding component 12.

[0081] In combination with Figures 1, 3 and 4, in some embodiments of the present application, the core shaft 11 includes a first shaft segment 113 and a second shaft segment 114, the shaft diameter of the first shaft segment 113 is larger than the shaft diameter of the second shaft segment 114, the conductive component 2 is arranged in the first shaft segment 113, and the winding component 12 is sleeved on the second shaft segment 114.

[0082] Specifically, the bottom end of the first shaft segment 113 is connected to the top end of the second shaft segment 114. Since the axial diameter of the first shaft segment 113 is larger than the axial diameter of the second shaft segment 114, the conductive component 2 can be set in the first shaft segment 113 to ensure that there is sufficient installation space for the conductive component 2. The winding component 12 is sleeved on the radial outside of the second shaft segment 114, and the end of the conductive component 2 close to the second shaft segment 114 in the axial direction is electrically connected to the winding component 12. By setting the conductive component 2 in the first shaft segment 113, the conductive component 2 is electrically connected to the winding component 12 and the motor controller.

[0083] Among them, a three-phase copper busbar is provided in the conductive component 2, and the three-phase copper busbar is electrically connected to the winding component 12 and the motor controller respectively.

[0084] In some embodiments of the present application, in combination with Figures 1, 6 and 13, the first cooling channel 133 is arranged in the first shaft segment 113 to ensure that the coolant in the first cooling channel 133 can exchange heat with the conductive component 2, and the second cooling channel 134 is arranged in the second shaft segment 114 to ensure that the coolant in the second cooling channel 134 can exchange heat with the winding component 12.

[0085] In some embodiments of the present application, the first cooling channel 133 and the second cooling channel 134 are in communication.

[0086] Specifically, in combination with Figures 5, 13 and 15, the liquid inlet 131 and the liquid outlet 132 are arranged at one end of the first shaft segment 113 away from the second shaft segment 114 in the axial direction, and the liquid inlet 131 and the liquid outlet 132 are connected to the first cooling channel 133, and the coolant can enter the first cooling channel 133 through the liquid inlet 131. In combination with Figures 13 and 14, the end of the first cooling channel 133 away from the liquid inlet 131 and the liquid outlet 132 is connected to the second cooling channel 134. After entering the first cooling channel 133, the coolant can further flow into the second cooling channel 134. After the coolant exchanges heat with the winding assembly 12 in the second cooling channel 134, it can flow back to the first cooling channel 133 and then flow into the vehicle cooling circuit through the liquid outlet 132.

[0087] In combination with Figures 13 to 15, in some embodiments of the present application, the first cooling channel 133 includes a first water inlet section 1331 and a first water outlet section 1332, the second cooling channel 134 includes multiple second water inlet sections 1341 and multiple second water outlet sections 1342, one end of the first water inlet section 1331 is connected to the first ends of the multiple second water inlet sections 1341, the second ends of the multiple second water inlet sections 1341 are connected to the first ends of the multiple second water outlet sections 1342, and the second ends of the multiple second water outlet sections 1342 are connected to the first water outlet section 1332.

[0088] Specifically, the first water inlet section 1331 is connected to the liquid inlet 131 at one end away from the second shaft section 114 in the axial direction, and the first water outlet section 1332 is connected to the liquid outlet 132 at one end away from the second shaft section 114 in the axial direction. The coolant can enter the first water inlet section 1331 through the liquid inlet 131, and after heat exchange, it can be discharged from the cooling water channel 13 through the first water outlet section 1332 and the liquid outlet 132 in sequence. Among them, the first water inlet section 1331 and the first water outlet section 1332 can both exchange heat with the conductive component 2, and the first water inlet section 1331 and the first water outlet section 1332 are spaced apart in the circumferential direction to ensure the heat exchange effect of the first cooling channel 133 on the conductive component 2, so as to ensure that the conductive component 2 can exchange heat evenly.

[0089] In some embodiments of the present application, a plurality of second water inlet sections 1341 are provided, and the plurality of second water inlet sections 1341 are spaced apart in the circumferential direction, and the ends of the plurality of second water inlet sections 1341 close to the first water inlet section 1331 are connected to the end of the first water inlet section 1331 away from the liquid inlet 131, and the end of the second water inlet section 1341 away from the first water inlet section 1331 is connected to the second water outlet section 1342, and a plurality of second water outlet sections 1342 are provided, and the plurality of second water outlet sections 1342 are spaced apart in the circumferential direction, and the ends of the plurality of second water outlet sections 1342 close to the first water outlet section 1332 are connected to the end of the first water outlet section 1332 away from the liquid outlet 132.

[0090] The cooling liquid can flow into multiple second water inlet sections 1341 through the first water inlet section 1331, and flow into the second water outlet section 1342 from the second water inlet section 1341. The second water inlet section 1341 and the second water outlet section 1342 can both exchange heat with the winding assembly 12. By providing multiple second water inlet sections 1341 and multiple second water outlet sections 1342, the heat exchange effect of the second cooling channel 134 on the winding assembly 12 is improved, and by arranging multiple second water inlet sections 1341 at intervals in the circumferential direction and multiple second water outlet sections 1342 at intervals in the circumferential direction, the heat dissipation uniformity of the winding assembly 12 is ensured.

[0091] The coolant after exchanging heat with the winding assembly 12 can flow from the second water outlet section 1342 into the first water outlet section 1332 and be discharged from the cooling water channel 13 through the liquid outlet 132 .

[0092] In combination with Figures 12 to 15, in some embodiments of the present application, the second cooling channel 134 also includes a connecting section 135, which is arranged at the bottom end of the second shaft section 114 and is arranged in a circular arc shape. The connecting section 135 is used to connect the second water inlet section 1341 and the second water outlet section 1342. The cooling liquid in the second water inlet section 1341 can flow into the second water outlet section 1342 through the connecting section 135.

[0093] Optionally, the connecting section 135 can also connect multiple second water inlet sections 1341 and multiple second water outlet sections 1342, which is beneficial to improving the flow efficiency of the coolant.

[0094] As shown in Figure 15, in some embodiments of the present application, the central angles corresponding to the circumferential ends of the multiple second water inlet sections 1341 are greater than the central angles corresponding to the circumferential ends of the first water inlet section 1331; and / or, the central angles corresponding to the circumferential ends of the multiple second water outlet sections 1342 are greater than the central angles corresponding to the circumferential ends of the first water outlet section 1332.

[0095] Specifically, on the projection surface in the axial direction of the core shaft 11, the first water inlet section 1331, the first water outlet section 1332, the second water inlet section 1341 and the second water outlet section 1342 are all arc-shaped, and multiple second water inlet sections 1341 together constitute a first arc line. The central angles corresponding to the two ends of the first arc line in the circumferential direction are greater than the central angles corresponding to the two ends of the first water inlet section 1331 in the circumferential direction, that is, the sum of the areas of the multiple second water inlet sections 1341 in the circumferential direction is greater than the area of ​​the first water inlet section 1331 in the circumferential direction, thereby increasing the heat exchange area of ​​the second cooling channel 134 and improving the heat exchange effect of the second cooling channel 134 on the winding assembly 12.

[0096] On the projection surface in the axial direction of the core shaft 11, multiple second water outlet sections 1342 together constitute a second arc, and the central angles corresponding to the two ends of the second arc in the axial direction are greater than the central angles corresponding to the two ends of the first water outlet section 1332 in the circumferential direction, that is, the sum of the areas of the multiple second water outlet sections 1342 in the circumferential direction is greater than the area of ​​the first water outlet section 1332 in the circumferential direction, thereby increasing the heat exchange area of ​​the second cooling channel 134 and improving the heat exchange effect of the second cooling channel 134 on the winding assembly 12.

[0097] Optionally, only the central angles corresponding to the circumferential ends of the multiple second water inlet sections 1341 can be made greater than the central angles corresponding to the circumferential ends of the first water inlet section 1331; only the central angles corresponding to the circumferential ends of the multiple second water outlet sections 1342 can be made greater than the central angles corresponding to the circumferential ends of the first water outlet section 1332; or the central angles corresponding to the circumferential ends of the multiple second water inlet sections 1341 can be greater than the central angles corresponding to the circumferential ends of the first water inlet section 1331, and the central angles corresponding to the circumferential ends of the multiple second water outlet sections 1342 can be greater than the central angles corresponding to the circumferential ends of the first water outlet section 1332, so as to further increase the heat exchange area of ​​the second cooling channel 134, thereby improving the heat exchange effect of the second cooling channel 134 on the winding assembly 12.

[0098] Of course, it is understandable that the specific arrangement of the multiple second water inlet sections 1341 and the multiple second water outlet sections 1342 can be determined according to the actual heat exchange requirements of the winding assembly 12, and no specific limitation is made here.

[0099] 14 , in some embodiments of the present application, a water inlet confluence section 137 is provided between the first water inlet section 1331 and the plurality of second water inlet sections 1341, and the first water inlet section 1331 is circumferentially close to one side of the water inlet confluence section 137; and / or, a water outlet confluence section 138 is provided between the first water outlet section 1332 and the plurality of second water outlet sections 1342, and the first water outlet section 1332 is circumferentially close to one side of the water outlet confluence section 138.

[0100] Specifically, the water inlet confluence section 137 is arranged at one end of the second water inlet section 1341 close to the first water inlet section 1331 in the axial direction, and the water inlet confluence section 137 is respectively connected to multiple second water inlet sections 1341. The coolant can flow into the multiple second water inlet sections 1341 at the same time through the water inlet confluence section 137, and the two ends of the water inlet confluence section 137 can be respectively connected to the two second water inlet sections 1341. The first water inlet section 1331 is arranged close to one side of the water inlet confluence section 137 in the circumferential direction and is connected to the water inlet confluence section 137, that is, the first water inlet section 1331 can be directly connected to one of the multiple second water inlet sections 1341 in the axial direction, which is conducive to ensuring the flow effect of the coolant.

[0101] The water outlet confluence section 138 is arranged at one end of the second water outlet section 1342 close to the first water outlet section 1332 in the axial direction, and the water outlet confluence section 138 is respectively connected to multiple second water outlet sections 1342. The coolant in the multiple second water outlet sections 1342 can flow into the first water outlet section 1332 through the water outlet confluence section 138, and the two ends of the water outlet confluence section 138 can be respectively connected to the two second water outlet sections 1342. The first water outlet section 1332 is arranged close to one side of the water outlet confluence section 138 in the circumferential direction and is connected to the water outlet confluence section 138, that is, the first water outlet section 1332 can be directly connected to one of the multiple second water outlet sections 1342 in the axial direction, which is conducive to ensuring the flow effect of the coolant.

[0102] Optionally, a water inlet merging section 137 and a water outlet merging section 138 can be provided on the core shaft 11 at the same time, and the water inlet merging section 137 and the water outlet merging section 138 are arranged at intervals and are not connected, so as to further improve the flow effect of the coolant and facilitate sufficient heat exchange between the coolant and the winding assembly 12.

[0103] 13 and 14 , in some embodiments of the present application, two guide sections 136 are provided between the first cooling channel 133 and the second cooling channel 134 .

[0104] Specifically, a guide section 136 is provided between the first water inlet section 1331 and the water inlet confluence section 137. The guide section 136 extends in an arc shape in the axial direction. The guide section 136 can connect the first water inlet section 1331 with the water inlet confluence section 137 in the axial direction. The guide section 136 is constructed in an arc shape to guide the coolant, so as to further improve the flow effect of the coolant.

[0105] As shown in Figure 11, in some embodiments of the present application, a first rib 116 is provided between two adjacent second water inlet sections 1341; and / or, a second rib 117 is provided between two adjacent second water outlet sections 1342; and / or, a third rib 118 is provided between adjacent second water inlet sections 1341 and second water outlet sections 1342.

[0106] Specifically, the first rib 116 is used to separate two adjacent second water inlet sections 1341 to prevent the coolant from flowing directly in the radial direction between the two adjacent second water inlet sections 1341, thereby increasing the flow path of the coolant so that the coolant can fully exchange heat with the winding assembly 12. At the same time, the first rib 116 can support the shaft wall 111 of the core shaft 11 in the radial direction to improve the structural strength of the core shaft 11.

[0107] The second rib 117 is used to separate two adjacent second water inlet sections 1341 to prevent the coolant from flowing directly in the radial direction between the two adjacent second water outlet sections 1342, thereby increasing the flow path of the coolant and improving the heat exchange effect of the coolant on the winding assembly 12. At the same time, the second rib 117 can support the shaft wall 111 of the core shaft 11 in the radial direction to improve the structural strength of the core shaft 11.

[0108] The third rib 118 can separate the second water inlet section 1341 and the second water outlet section 1342 that are adjacent to each other in the circumferential direction to prevent the coolant from flowing directly from the second water inlet section 1341 to the second water outlet section 1342 in the radial direction, thereby increasing the flow path of the coolant and improving the heat exchange effect of the coolant on the winding assembly 12. In addition, the third rib 118 can support the shaft wall 111 of the core shaft 11 in the radial direction to improve the structural strength of the core shaft 11.

[0109] Optionally, one of the first rib 116, the second rib 117 and the third rib 118 can be set on the core shaft 11 separately; or any two of the first rib 116, the second rib 117 and the third rib 118 can be set on the core shaft 11; or the first rib 116, the second rib 117 and the third rib 118 can be set on the core shaft 11 at the same time. The specific arrangement of the first rib 116, the second rib 117 and the third rib 118 can be determined according to the structural strength requirements of the core shaft 11 and the heat exchange requirements of the winding assembly 12, and is not specifically limited here.

[0110] In combination with Figures 7, 8 and 18, in some embodiments of the present application, a first positioning portion 14 is provided in the first chamber 112, and the conductive component 2 is provided with a first positioning matching portion 21. The first positioning portion 14 is positioned and matched with the first positioning matching portion 21 to limit the circumferential rotational freedom of the conductive component 2.

[0111] Specifically, a first positioning portion 14 is provided in the first chamber 112, and the first positioning portion 14 is used to position and cooperate with the first positioning matching portion 21 on the conductive component 2 to limit the conductive component 2 in the circumferential direction, prevent the conductive component 2 from rotating in the first chamber 112, and improve the assembly stability of the conductive component 2.

[0112] Among them, the first positioning portion 14 can be set at the end of the first shaft segment 113 close to the second shaft segment 114, and accordingly, the first positioning matching portion 21 can be set at one end of the conductive component 2 close to the second shaft segment 114, which can prevent the first positioning matching portion 21 from interfering with the cavity wall of the first cavity 112 during the process of installing the conductive component 2 into the first cavity 112 and affecting the assembly of the conductive component 2.

[0113] In some embodiments of the present application, one of the first positioning portion 14 and the first positioning matching portion 21 is configured as a positioning protrusion, and the other is configured as a positioning groove.

[0114] Specifically, in combination with Figures 7 and 8, the first positioning portion 14 can be constructed as a positioning groove, which is recessed in the axial direction toward the second shaft segment 114. In combination with Figures 16 to 18, the first positioning matching portion 21 can be constructed as a positioning protrusion. The positioning protrusion can be arranged at one end of the conductive component 2 in the axial direction close to the second shaft segment 114, and the positioning protrusion bulges in the axial direction toward the second shaft segment 114. The positioning protrusion can be inserted into the positioning groove to position and cooperate with the positioning groove, thereby limiting the circumferential rotational freedom of the conductive component 2 and ensuring the assembly stability of the conductive component 2.

[0115] Optionally, the first positioning portion 14 can be constructed as a positioning protrusion, and the first positioning matching portion 21 can be constructed as a positioning groove. This structure achieves the same technical effect as the above structure, and will not be described in detail here.

[0116] 5 , 19 and 20 , in some embodiments of the present application, a fixing protrusion 15 is provided at the end of the first chamber 112 , and the linear motor 100 includes a first fixing connector 3 , which is fixed to the conductive component 2 through the fixing protrusion 15 .

[0117] Specifically, the first chamber 112 is open at one end away from the second shaft segment 114, and the conductive component 2 can be installed in the first chamber 112 through the open end of the first chamber 112. The fixing protrusion 15 is arranged in the first chamber 112 and close to the open end of the first chamber 112, that is, the fixing protrusion 15 can be arranged on the shaft wall 111 of the first shaft segment 113 and extend from the shaft wall 111 of the first shaft segment 113 in a direction close to the central axis of the first shaft segment 113, and at the same time, the fixing protrusion 15 bulges along the axial direction toward the open end of the first chamber 112.

[0118] Furthermore, a connecting portion 22 is provided at one end of the conductive component 2 away from the first positioning fitting portion 21 in the axial direction. When the conductive component 2 is installed to the first shaft segment 113, the connecting portion 22 is opposite to the fixing protrusion 15. The first fixed connecting member 3 is sequentially passed through the connecting portion 22 and the fixing protrusion 15, and the connecting portion 22 is fixedly connected to the fixing protrusion 15, so that the conductive component 2 can be fixedly connected to the core shaft 11, thereby improving the assembly reliability of the conductive component 2.

[0119] Among them, the first fixed connector 3 can be configured as a threaded connector, such as a bolt or a screw, and a threaded hole is formed on the fixing protrusion 15. Similarly, the connecting portion 22 can be constructed as a threaded hole to facilitate the fixed connection between the conductive component 2 and the core shaft 11 through the first fixed connector 3.

[0120] In conjunction with Figures 17 to 19, in some embodiments of the present application, an avoidance groove 24 is formed on the conductive component 2 at a position opposite to the fixing protrusion 15, and the avoidance groove 24 extends in the axial direction. During the process of installing the conductive component 2 into the first chamber 112, the conductive component 2 slides from the open end of the first chamber 112 toward the direction close to the second shaft segment 114, and at the same time, the fixing protrusion 15 can slide in the avoidance groove 24, so that the conductive component 2 and the fixing protrusion 15 can avoid each other, so as to prevent the fixing protrusion 15 and the conductive component 2 from interfering with each other and affecting the assembly of the conductive component 2.

[0121] In some embodiments of the present application, the fixing protrusion 15 and the core shaft 11 are integrally formed to improve the integration of the core shaft 11 and simplify the assembly of parts of the primary component 1, thereby simplifying the assembly of parts of the linear motor 100, which is beneficial to improving the production and assembly efficiency of the linear motor 100.

[0122] In combination with Figures 2 to 4 and Figures 7 and 8, in some embodiments of the present application, the lead wire 121 of the winding assembly 12 is located radially outside the core shaft 11; the linear motor 100 also includes an electrical connector 4, and the shaft wall 111 of the core shaft 11 is formed with a connecting hole 16, and the electrical connector 4 is passed through the connecting hole 16 and is electrically connected to the lead wire 121 and the conductive assembly 2 respectively.

[0123] Specifically, a connecting hole 16 is formed on the shaft wall 111 of the core shaft 11, and the connecting hole 16 is set through the shaft wall 111. One end of the electrical connector 4 passes through the connecting hole 16 and extends into the first chamber 112 to be connected to the conductive component 2. The other end of the electrical connector 4 passes through the connecting hole 16 and is connected to the lead wire 121 located radially outside the core shaft 11, so that the winding component 12 can be electrically connected to the motor controller through the conductive component 2.

[0124] 2 to 4 and 7 and 8 , in some embodiments of the present application, the communication hole 16 is located at the bottom of the first chamber 112 .

[0125] Specifically, the winding assembly 12 is sleeved on the radial outside of the second shaft segment 114, and the lead wire 121 of the winding assembly 12 is located on the radial outside of the second shaft segment 114, and the connecting hole 16 is arranged through the shaft wall 111 of the first shaft segment 113 in the radial direction and is connected to the first chamber 112, and the connecting hole 16 is arranged at one end of the first shaft segment 113 close to the second shaft segment 114, that is, the connecting hole 16 is located at the bottom of the first chamber 112, so that the electrical connector 4 passes through the connecting hole 16 to be electrically connected to the lead wire 121 and the conductive component 2 respectively, and it is beneficial to shorten the length of the electrical connector 4 and save the cost required to produce the electrical connector 4.

[0126] In combination with Figures 16 to 18, in some embodiments of the present application, a positioning protrusion is provided at one end of the conductive component 2 close to the second shaft segment 114, and a connecting groove 23 is provided on the positioning protrusion. One end of the electrical connector 4 extends into the first chamber 112 through the connecting hole 16 and is further inserted into the connecting groove 23 and welded to the three-phase copper busbar of the conductive component 2 to achieve electrical connection between the electrical connector 4 and the conductive component 2. Similarly, the other end of the electrical connector 4 is welded to the lead wire 121 of the winding component 12 to achieve electrical connection between the electrical connector 4 and the lead wire 121.

[0127] 16 and 17 , an electrical control connector 5 is provided at one end of the conductive component 2 away from the winding component 12 , and the conductive component 2 can be electrically connected to the motor controller through the electrical control connector 5 .

[0128] In combination with Figures 2, 9 and 10, in some embodiments of the present application, a wire outlet hole 17 is provided on the core shaft 11, and the wire outlet hole 17 is arranged at one end of the first shaft segment 113 close to the second shaft segment 114, and the wire outlet hole 17 is connected to the connecting hole 16 and is arranged opposite to the connecting groove 23. After passing through the connecting hole 16, the electrical connector 4 can extend into the connecting groove 23 through the wire outlet hole 17 and be electrically connected to the conductive component 2.

[0129] The wire outlet hole 17 may extend in the axial direction to reduce the weight of the core shaft 11 and realize a lightweight design of the core shaft 11 , thereby facilitating a lightweight design of the linear motor 100 .

[0130] In some embodiments of the present application, the linear motor 100 further includes: a secondary component coupled to the primary component 1, the secondary component being movable relative to the primary component; and a detection device for detecting the position of the secondary component.

[0131] Specifically, the secondary assembly is cylindrical and sleeved on the radially outer side of the primary assembly 1 . The secondary assembly is coupled to the primary assembly 1 to reciprocate relative to the primary assembly 1 , thereby driving the load to achieve linear motion.

[0132] Furthermore, the detection device can detect the position change of the secondary component when it moves relative to the primary component 1 to determine the working state of the linear motor 100, and is conducive to improving the operating stability of the linear motor 100.

[0133] In some embodiments of the present application, the detection device includes a sensing member 61 and a reading head. The sensing member 61 is provided on the core shaft 11 , and the reading head is provided on the secondary assembly. The reading head is coupled to the sensing member 61 to detect the position of the secondary assembly.

[0134] Specifically, when the linear motor 100 is working, relative movement will occur between the secondary component and the primary component 1. By setting the sensing element 61 and the reading head, the position change of the primary component 1 and the secondary component during relative movement can be detected to determine the working state of the linear motor 100, and it is beneficial to improve the stability of the operation of the linear motor 100.

[0135] In combination with Figures 2 and 4, in some embodiments of the present application, the outer peripheral wall of the core shaft 11 is provided with a placement groove 115, which is recessed from the outer peripheral wall of the core shaft 11 in a direction close to the first chamber 112, and the placement groove 115 extends along the axial direction of the core shaft 11. The induction member 61 is arranged in the placement groove 115 to facilitate the assembly of the induction member 61 on the stator core shaft 11. For example: when installing the induction member 61, the induction member 61 can be inserted into the placement groove 115, which improves the assembly convenience of the induction member 61 and at the same time improves the assembly accuracy of the induction member 61.

[0136] Among them, the sensing element 61 can be constructed as a sensor magnetic strip, and there are multiple sensor magnetic strips, which are arranged in sequence along the axial direction of the core shaft 11. The reader can read the magnetic field information of the sensor magnetic strip to determine the position of the mover assembly.

[0137] 2 , 9 and 10 , in some embodiments of the present application, the placement groove 115 and the cooling water channel 13 are staggered.

[0138] Specifically, in the circumferential direction of the core shaft 11, the placement groove 115 is staggered with the first water inlet section 1331 and the first water outlet section 1332 in the circumferential direction, that is, the placement groove 115 can be located between the first water inlet section 1331 and the first water outlet section 1332 in the circumferential direction and is circumferentially spaced apart from the first water inlet section 1331 and the first water outlet section 1332.

[0139] At the same time, the placement groove 115 is staggered with multiple second water inlet sections 1341 and multiple second water outlet sections 1342 in the circumferential direction, that is, the prevention groove can be located between the adjacent second water inlet sections 1341 and second water outlet sections 1342 in the circumferential direction and is spaced apart from the second water inlet sections 1341 and second water outlet sections 1342 in the circumferential direction.

[0140] In this way, the circumferential space of the core shaft 11 can be fully utilized to achieve a reasonable arrangement of the sensing part 61 and the cooling water channel 13. While ensuring the detection effect and cooling effect, the structural compactness of the core shaft 11 can be improved, and the placement groove 115 and the cooling water channel 13 are staggered, which can effectively prevent the shaft wall 111 of the core shaft 11 from being too thin, which is beneficial to improving the structural strength of the core shaft 11.

[0141] The electromagnetic suspension 1000 according to the present application includes the above-mentioned linear motor 100 .

[0142] Since the electromagnetic suspension 1000 includes the above-mentioned linear motor 100, the cooling water channel 13 and the conductive component 2 are both arranged in the core shaft 11, which is conducive to improving the space utilization in the core shaft 11, making the structure of the core shaft 11 more compact, and is conducive to realizing the miniaturization design of the linear motor 100. The cooling water channel 13 is formed by the shaft wall 111 of the core shaft 11, which improves the integration of the core shaft 11 and does not require the arrangement of additional pipelines, which is conducive to realizing the lightweight design of the linear motor 100 and can simplify the components of the linear motor 100. At the same time, the cooling water channel 13 has good sealing performance, which can effectively prevent the cooling water channel 13 from leaking, improve the isolation effect between the conductive component 2 and the coolant, and improve the safety of the linear motor 100. In addition, the coolant can exchange heat with the conductive component 2 and the winding component 12 at the same time, thereby improving the heat dissipation effect of the conductive component 2 and the winding component 12.

[0143] The vehicle 10000 according to the present application includes the electromagnetic suspension 1000 described above.

[0144] Since the vehicle 10000 includes the above-mentioned electromagnetic suspension 1000, and the electromagnetic suspension 1000 includes the above-mentioned linear motor 100, the cooling water channel 13 and the conductive component 2 are both arranged in the core shaft 11, which is conducive to improving the space utilization in the core shaft 11, making the structure of the core shaft 11 more compact, and is conducive to realizing the miniaturization design of the linear motor 100. The cooling water channel 13 is formed by the shaft wall 111 of the core shaft 11, which improves the integration of the core shaft 11 and does not require the arrangement of additional pipelines, which is conducive to realizing the lightweight design of the linear motor 100 and can simplify the components of the linear motor 100. At the same time, the cooling water channel 13 has good sealing performance, which can effectively prevent the cooling water channel 13 from leaking, improve the isolation effect between the conductive component 2 and the coolant, and improve the safety of the linear motor 100. In addition, the coolant can simultaneously exchange heat with the conductive component 2 and the winding component 12, thereby improving the heat dissipation effect of the conductive component 2 and the winding component 12.

[0145] Throughout this specification, reference to terms such as "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 present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0146] Although the embodiments of the present application 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A linear motor (100), wherein: include: A primary assembly (1), the primary assembly (1) comprising a core shaft (11) and a winding assembly (12) disposed on the core shaft (11); the core shaft (11) comprising a shaft wall (111) and a first chamber (112) surrounded by the shaft wall (111); a cooling water channel (13) being provided in the shaft wall (111); A conductive component (2) is disposed in the first chamber (112), one end of the conductive component (2) is connected to the winding component (12), and the other end of the conductive component (2) is suitable for being electrically connected to a motor controller.

2. The linear motor (100) according to claim 1, wherein: The cooling water channel (13) is provided with a liquid inlet (131) and a liquid outlet (132).

3. The linear motor (100) according to claim 2, wherein: The liquid inlet (131) and the liquid outlet (132) are located on the same end surface of the core shaft (11).

4. The linear motor (100) according to any one of claims 1 to 3, wherein: The cooling water channel (13) comprises a first cooling channel (133) and a second cooling channel (134); the first cooling channel (133) is used for heat exchange with the conductive component (2); and the second cooling channel (134) is used for heat exchange with the winding component (12).

5. The linear motor (100) according to claim 4, wherein: The core shaft (11) comprises a first shaft section (113) and a second shaft section (114); the shaft diameter of the first shaft section (113) is larger than the shaft diameter of the second shaft section (114); the conductive component (2) is arranged in the first shaft section (113); and the winding component (12) is sleeved on the second shaft section (114); The first cooling channel (133) is provided in the first shaft section (113), and the second cooling channel (134) is provided in the second shaft section (114).

6. The linear motor (100) according to claim 4 or 5, wherein: The first cooling channel (133) and the second cooling channel (134) are in communication.

7. The linear motor (100) according to claim 6, wherein: The first cooling channel (133) includes a first water inlet section (1331) and a first water outlet section (1332); the second cooling channel (134) includes multiple second water inlet sections (1341) and multiple second water outlet sections (1342); one end of the first water inlet section (1331) is connected to the first ends of the multiple second water inlet sections (1341); the second ends of the multiple second water inlet sections (1341) are connected to the first ends of the multiple second water outlet sections (1342); and the second ends of the multiple second water outlet sections (1342) are connected to the first water outlet section (1332).

8. The linear motor (100) according to claim 7, wherein: The central angles corresponding to the two circumferential ends of the plurality of second water inlet sections (1341) are greater than the central angles corresponding to the two circumferential ends of the first water inlet section (1331); and / or, The central angles corresponding to the two circumferential ends of the plurality of second water outlet sections (1342) are greater than the central angles corresponding to the two circumferential ends of the first water outlet section (1332).

9. The linear motor (100) according to claim 7, wherein: A water inlet merging section (137) is provided between the first water inlet section (1331) and the plurality of second water inlet sections (1341), and the first water inlet section (1331) is located close to one side of the water inlet merging section (137) in the circumferential direction; and / or, A water outlet merging section (138) is provided between the first water outlet section (1332) and the plurality of second water outlet sections (1342), and the first water outlet section (1332) is close to one side of the water outlet merging section (138) in the circumferential direction.

10. The linear motor (100) according to claim 7, wherein: A first rib (116) is provided between two adjacent second water inlet sections (1341); and / or, A second rib (117) is provided between two adjacent second water outlet sections (1342); and / or, A third rib (118) is provided between the adjacent second water inlet section (1341) and the second water outlet section (1342).

11. The linear motor (100) according to any one of claims 1 to 10, wherein: A first positioning portion (14) is provided in the first chamber (112), and the conductive component (2) is provided with a first positioning matching portion (21). The first positioning portion (14) and the first positioning matching portion (21) are positioned and matched to limit the circumferential rotational freedom of the conductive component (2).

12. The linear motor (100) according to claim 11, wherein: One of the first positioning portion (14) and the first positioning matching portion (21) is configured as a positioning protrusion, and the other is configured as a positioning groove.

13. The linear motor (100) according to claim 11 or 12, wherein: A fixing protrusion (15) is provided at the end of the first chamber (112), and the linear motor (100) includes a first fixing connection member (3), and the first fixing connection member (3) passes through the fixing protrusion (15) and is fixed to the conductive component (2).

14. The linear motor (100) according to claim 13, wherein: The fixing protrusion (15) and the core shaft (11) are an integrally formed part.

15. The linear motor (100) according to any one of claims 1 to 14, wherein: The lead wire (121) of the winding assembly (12) is located radially outside the core shaft (11); The linear motor (100) further includes an electrical connector (4); a shaft wall (111) of the core shaft (11) is formed with a communication hole (16); the electrical connector (4) is passed through the communication hole (16) and is electrically connected to the lead wire (121) and the conductive component (2), respectively.

16. The linear motor (100) according to claim 15, wherein: The communicating hole (16) is located at the bottom of the first chamber (112).

17. The linear motor (100) according to any one of claims 1 to 16, wherein: The linear motor (100) further comprises: a secondary assembly coupled to the primary assembly (1), the secondary assembly being movable relative to the primary assembly; A detection device is used to detect the position of the secondary assembly.

18. The linear motor (100) according to claim 17, wherein: The detection device comprises an induction member (61) and a reading head, wherein the induction member (61) is arranged on the core shaft (11), and the reading head is arranged on the secondary component, and the reading head is coupled to the induction member (61) to detect the position of the secondary component.

19. The linear motor (100) according to claim 18, wherein: The outer peripheral wall of the core shaft (11) is provided with a placement groove (115), and the induction component (61) is placed in the placement groove (115).

20. The linear motor (100) according to claim 19, wherein: The placement groove (115) and the cooling water channel (13) are arranged in a staggered manner.

21. An electromagnetic suspension (1000), wherein: The electromagnetic suspension (1000) comprises a linear motor (100) according to any one of claims 1-20.

22. A vehicle (10000), wherein: Comprising the electromagnetic suspension (1000) according to claim 21.

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