A linear motor suspension actuator and vehicle

Abstract

The embodiment of the application relates to the technical field of electric control suspensions, and discloses a linear motor suspension actuator and a vehicle; the linear motor suspension actuator comprises a mover and first and second stators arranged on the inner and outer sides of the mover respectively, the first and second stators are used for driving the mover to move in the axial direction of the mover; at least one end of the first stator and at least one end of the second stator are staggered in the projection position of end faces in the axial direction of the mover; the technical scheme provided by the application improves the end effect of the double-stator type linear motor suspension actuator, reduces the sudden change of the end thrust of the mover, reduces disturbance, and improves the suspension control precision.

Description

Technical Field

[0001] This application relates to the field of electronically controlled suspension technology, and more particularly to a linear motor suspension actuator and a vehicle. Background Technology

[0002] Currently, there are many types of chassis suspensions. Based on different suspension actuator structures, the mainstream suspensions mainly include hydraulic electronic suspensions, airbag electronic suspensions, and linear motor electromagnetic suspensions. Regardless of the type, their basic principles and design purposes are the same: to absorb and disperse the vibration and impact energy caused by uneven road surfaces by providing stiffness and damping force, thereby ensuring good contact between the wheels and the ground, and improving vehicle ride comfort and driving stability.

[0003] In the prior art, in order to improve thrust density, there is a linear motor structure with inner and outer double stators. The actuator of this linear motor uses two stators arranged on the inner and outer sides of the mover. The inner and outer stators exert force simultaneously to drive the mover to move linearly along its own axial direction. However, when the mover moves to the end that protrudes from the stator, the thrust on the protruding part of the mover will drop sharply to 0 or even form a resistance in the opposite direction.

[0004] Therefore, the existing dual-stator linear motor suspension actuator has the problem of large sudden changes in thrust at the mover end and obvious disturbances, which affects the control accuracy of the suspension. Summary of the Invention

[0005] In view of this, embodiments of this application provide a linear motor suspension actuator and a vehicle, which aim to improve the end effect of the dual-stator linear motor suspension actuator, reduce the sudden change in thrust at the mover end, mitigate disturbances, and improve suspension control accuracy.

[0006] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows: In a first aspect, embodiments of this application provide a linear motor suspension actuator, including a mover and a first stator and a second stator respectively disposed on its inner and outer sides, wherein the first stator and the second stator are both used to drive the mover to move along its axial direction; At least one end of the first stator and at least one end of the second stator are offset from each other in the axial projection position of the mover.

[0007] The linear motor suspension actuator provided in this application embodiment adopts a dual-stator structure. Specifically, a first stator and a second stator are respectively provided on the inner and outer sides of the mover. At least one end of the first stator and at least one end of the second stator have their end faces projected off in the axial direction of the mover. That is, the projections of the first stator and the second stator in the axial direction have an overlapping region and a misaligned region. The overlapping region is the area where the mover can be driven simultaneously by the magnetic fields of the first stator and the second stator. The misaligned region is the area where the mover can only be driven by the magnetic field of one of the first stator and the second stator. When the mover moves to the misaligned region... In the overlapping region, the mover will first bulge out of one of the stators axially. At this time, the magnetic link will not be broken, but a small magnetic link will be formed by the other stator. Taking the thrust provided by one stator to the mover as F as an example, when the mover is located in the overlapping region, the thrust received by the mover is 2F. When the mover bulges out of one of the stators, the other stator continues to provide thrust to the bulging part of the mover, and the thrust received by this part of the mover is F. Compared with the existing technology where the thrust of this part is 0 or even the resistance in the opposite direction, the impact of the end effect is reduced, and the problem of sudden changes and disturbances in the end thrust of the existing dual-stator linear motor, which leads to large thrust fluctuations and affects the control accuracy, is improved.

[0008] In one possible implementation of this application, each end face of the first stator is offset from the corresponding end face of the second stator in the axial projection position of the mover.

[0009] In one possible implementation of this application, the axial lengths of the first stator and the second stator are equal; The axial projection area of ​​the first stator partially overlaps with the axial projection area of ​​the second stator.

[0010] In one possible implementation of this application, the axial lengths of the first stator and the second stator are different; The axial projection area of ​​the first stator partially overlaps with the axial projection area of ​​the second stator.

[0011] In one possible implementation of this application, the axial lengths of the first stator and the second stator are different: The entire axial projection area of ​​the first stator is located inside the axial projection area of ​​the second stator; Alternatively, the entire axial projection area of ​​the second stator is located inside the axial projection area of ​​the first stator.

[0012] In one possible implementation of this application, the axial lengths of the first stator and the second stator are different; One end of the first stator and the corresponding end of the second stator are aligned in the axial projection of their end faces; and the other end of the first stator and the corresponding end of the second stator are offset in the axial projection of their end faces.

[0013] In one possible implementation of this application, the first stator includes a plurality of first core groups and a plurality of first stator windings, and each first core group includes a plurality of first stator cores arranged axially. At least a portion of the first stator windings are respectively wound on each of the corresponding first stator cores; The second stator includes multiple second core groups and multiple second stator windings, and each second core group includes multiple second stator cores arranged axially. At least a portion of the second stator windings are wound on the corresponding second stator cores.

[0014] In one possible implementation of this application, a controller and a temperature sensor are further included. The controller is electrically connected to each of the first stator windings and each of the second stator windings, respectively, and the temperature sensor is used to detect the temperature of the first stator and the second stator. The controller is connected to the temperature sensor signal and is used to control the operating conditions of each first stator winding and each second stator winding according to the detection result of the temperature sensor, so as to regulate the axial force generated by the first stator and the second stator on the mover respectively.

[0015] In one possible implementation of this application, the power supply lines of each of the first stator windings and the power supply lines of each of the second stator windings are connected in parallel in the power supply circuit.

[0016] Secondly, embodiments of this application provide a vehicle, including a chassis and a linear motor suspension actuator as described in any of the preceding claims, disposed on the chassis; wherein the linear motor suspension actuator includes a mover and a first stator and a second stator respectively disposed on its inner and outer sides, the first stator and the second stator both being used to drive the mover to move along its axial direction; At least one end of the first stator and at least one end of the second stator are offset from each other in the axial projection position of the mover.

[0017] The linear motor suspension actuator provided in this application embodiment adopts a dual-stator structure. Specifically, a first stator and a second stator are respectively provided on the inner and outer sides of the mover. At least one end of the first stator and at least one end of the second stator have their end faces projected off in the axial direction of the mover. That is, the projections of the first stator and the second stator in the axial direction have an overlapping region and a misaligned region. The overlapping region is the area where the mover can be driven simultaneously by the magnetic fields of the first stator and the second stator. The misaligned region is the area where the mover can only be driven by the magnetic field of one of the first stator and the second stator. When the mover moves to the misaligned region... In the overlapping region, the mover will first bulge out of one of the stators axially. At this time, the magnetic link will not be broken, but a small magnetic link will be formed by the other stator. Taking the thrust provided by one stator to the mover as F as an example, when the mover is located in the overlapping region, the thrust received by the mover is 2F. When the mover bulges out of one of the stators, the other stator continues to provide thrust to the bulging part of the mover, and the thrust received by this part of the mover is F. Compared with the existing technology where the thrust of this part is 0 or even the resistance in the opposite direction, the impact of the end effect is reduced, and the problem of sudden changes and disturbances in the end thrust of the existing dual-stator linear motor, which leads to large thrust fluctuations and affects the control accuracy, is improved. Attached Figure Description

[0018] Figure 1 This is a partial cross-sectional view of the linear motor suspension actuator provided in an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the side view structure; Figure 3 for Figure 2 A partial cross-sectional structural schematic diagram of the linear motor suspension actuator in the diagram; Figure 4 for Figure 1 A schematic diagram of the enlarged middle section structure; Figure 5 for Figure 1 A magnified structural diagram of the misalignment area of ​​the linear motor suspension actuator in the diagram; Figure 6 This is an enlarged structural diagram of the end region of a linear motor suspension actuator in the prior art. Figure 7 A cross-sectional structural schematic diagram of another embodiment of the linear motor suspension actuator provided in this application; Figure 8 A simplified structural diagram of another embodiment of the linear motor suspension actuator provided in this application; Figure 9A simplified structural diagram of yet another embodiment of the linear motor suspension actuator provided in this application; Figure 10 A simplified structural diagram of yet another embodiment of the linear motor suspension actuator provided in this application; Figure 11 for Figure 1 A schematic diagram of the structure of the first stator of the linear motor suspension actuator in the diagram; Figure 12 for Figure 11 A schematic diagram of the structure of the first stator core laminations in the first stator; Figure 13 for Figure 1 A schematic diagram of the moving part of the linear motor suspension actuator in the diagram; Figure 14 for Figure 1 A schematic diagram of the structure of the second stator of the linear motor suspension actuator in the diagram; Figure 15 for Figure 14 A schematic diagram of the structure of the second stator core laminations in the second stator; Figure 16 for Figure 1 A magnified structural diagram of a local area in the middle section; Figure 17 for Figure 1 A magnified structural diagram of another local area.

[0019] Figure label: 100. Linear motor suspension actuator; 1. First stator; 11. First core assembly; 111. First stator core; 111a. First stator core laminations; 12. First stator winding; 13. First non-magnetic ring; 2. Mover; 21. Permanent magnet; 3. Second stator; 31. Second core assembly; 311. Second stator core; 311a. Second stator core laminations; 32. Second stator winding; 33. Second non-magnetic ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0021] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0022] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0023] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0024] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0025] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0026] This application provides a vehicle. It should be noted that the vehicle in this application can refer to large vehicles, small vehicles, special-purpose vehicles, etc. For example, according to vehicle type, the vehicle in this application can be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV), or other types of vehicles. Generally, a vehicle is equipped with wheels, a power source, and a transmission system between the wheels and the power source. The transmission system can transmit the power provided by the power source to the wheels, causing the wheels to rotate and thus driving the vehicle.

[0027] It should be noted that the type of power source of the vehicle is not limited in the embodiments of this application. For example, for fuel vehicles, the power source can refer to fuel engines such as gasoline engines and diesel engines; for electric vehicles, the power source can refer to electric motors; for hybrid vehicles, the power source can refer to engines or electric motors; for vehicles powered by other means, the power source can refer to devices that generate power.

[0028] In existing technologies, to improve thrust density, linear motor structures with inner and outer double stators have been developed. The actuator of this type of linear motor employs two stators arranged on the inner and outer sides of the mover. The two stators simultaneously output force, driving the mover to move linearly along its axial direction. The inner and outer stators are of equal length and aligned at both ends. When the mover is completely in the middle of the stator, it is entirely within the stator core, resulting in a symmetrical magnetic field distribution on both sides. When the mover moves axially to partially protrude from the stator... When the moving part protrudes from one end of the stator, the magnetic link on that side will be broken because there is no corresponding stator part. The magnetic lines of force on the protruding part will diverge outward from the air gap, resulting in end leakage magnetic field. The air magnetic circuit in this part can hardly provide thrust to the moving part. For example, if the thrust provided by one stator to the moving part is F, when the moving part is located inside the two stator cores, the thrust it receives is 2F. When the moving part protrudes from the end of the stator, the thrust received by this part of the moving part will drop sharply to 0 or even form a resistance in the opposite direction. The end effect is very obvious.

[0029] The linear motor suspension actuator provided in this application aims to improve the end effect of the dual-stator linear motor suspension actuator, reduce sudden changes in the thrust at the mover end, mitigate disturbances, and improve suspension control accuracy.

[0030] Figures 1 to 3 These are cross-sectional views of the linear motor suspension actuator 100 provided in the embodiments of this application from different perspectives. Figure 4 for Figure 1 A diagram showing the portion after cutting off both ends of the middle section. Figure 4 In the figure, both ends of the first stator 1 extend beyond the axis shown in the figure.

[0031] Reference Figures 1 to 4 This application provides a linear motor suspension actuator 100, including a mover 2 and a first stator 1 and a second stator 3 respectively disposed on its inner and outer sides. Figures 1 to 4 In the embodiment, the outer contours of the first stator 1, the mover 2 and the second stator 3 are all circular. Obviously, this design is not limited to this. In other embodiments, the first stator 1, the mover 2 and the second stator 3 can all be plate-shaped, and the three shapes are compatible.

[0032] You can refer to them together. Figure 13 The mover 2 includes a plurality of permanent magnets 21 extending along its axial direction. Specifically, the mover 2 is cylindrical, and the plurality of permanent magnets 21 are arranged in multiple groups along its circumference.

[0033] The first stator 1 is disposed inside the mover 2. Specifically, in this embodiment, it is located inside the mover 2 and is commonly referred to as the inner stator. The first stator 1 is driven to move along its axial direction. Specifically, the first stator 1 includes a plurality of first iron core groups 11 distributed circumferentially and a first stator winding 12 wound around the periphery of the first iron core groups 11. When the first stator winding 12 is energized, the plurality of first iron core groups 11 drive the mover 1 to move axially. By changing the reverse of the current, the direction of movement of the mover 1 can be changed.

[0034] The second stator 3 is disposed outside the mover 2. Specifically, in this embodiment, it is located outside the mover 2 and is commonly referred to as the outer stator. The second stator 3 drives the mover 1 to move axially. Specifically, the second stator 3 includes a plurality of second iron core groups 31 distributed circumferentially and a second stator winding 32 wound around the periphery of the second iron core groups 31. When the second stator winding 32 is energized, the plurality of second iron core groups 31 drive the mover 1 to move axially. By changing the reverse of the current, the direction of movement of the mover 1 can be changed.

[0035] The core of the linear motor suspension actuator of the present invention lies in the fact that the projection positions of the end faces of at least one end of the first stator 1 and at least one end of the second stator 3 on the axial direction of the mover 2 are offset. This "offset" means that the end faces of at least one end of the first stator 1 and at least one end of the second stator 3 are not aligned or flush with each other in the axial direction of the mover 2, but are offset. In other words, if the central axis of the mover 2 is taken as the Z-axis, then the entire actuator is arranged along the Z-direction (height direction). At this time, the projection coordinate values ​​of the end faces of at least one end of the first stator 1 and at least one end of the second stator 3 on the Z-axis are different, or in other words, their heights on the Z-axis are different. For example, taking the top ends of the first stator 1 and the second stator 3 as examples, the end faces of the two top ends are not aligned, their heights are inconsistent, and their projection positions or coordinate values ​​on the Z-axis are also different. Therefore, it is said that their projection positions on the axial direction of the mover 2 are offset.

[0036] That is, the projections of the first stator 1 and the second stator 3 in the axial direction have overlapping regions and misaligned regions. The overlapping region is the region where the mover 2 can be driven by the magnetic field of the first stator 1 and the magnetic field of the second stator 3 at the same time. The misaligned region is the region that is offset as described above, that is, the region where the mover 2 can only be driven by the magnetic field of one of the first stator 1 and the second stator 3.

[0037] Please refer to further information. Figure 5Taking the first stator 1 protruding from the second stator 3 as an example, when the mover 2 moves to this misalignment area, the mover 2 will first bulge out of the second stator 3 axially. At this time, the magnetic link of the second stator 3 is broken, but the air magnetic circuit at the other end of the first stator 1 and the mover 2 forms a small magnetic link (such as...). Figure 5 (The arrows in the curved section indicate the direction of the air magnetic circuit, and the straight arrows indicate the direction of the magnetic circuit formed by the first stator 1). Taking the magnitude of the thrust F provided by one stator to the mover 2 as an example, when the mover 2 is located in the overlapping region, the thrust received by the mover 2 is 2F. When the mover 2 is located in the misaligned region, the first stator 1 continues to provide thrust to the protruding part of the mover 2, and the thrust received by this part of the mover 2 is F. Please refer to the prior art. Figure 6 The two stators are of equal length and aligned at both ends. When the mover 2' protrudes from one end face, the protruding part of the mover 2' is only affected by the air magnetic circuit, and the thrust it experiences is zero or even a drag force in the opposite direction. Compared with the prior art where the thrust in this part is zero or even a drag force in the opposite direction, the technical solution provided in this application reduces the impact of the end effect and improves the problem of sudden changes and disturbances in end thrust in existing dual-stator linear motors, which leads to large thrust fluctuations and affects control accuracy.

[0038] It is well known to those skilled in the art that conventional single-stator cylindrical motors have low thrust density, and their movers need to withstand a large unilateral radial magnetic pull, resulting in severe bearing wear. Existing double-stator cylindrical motors, with their inner and outer double-stator structure, can improve thrust density. To address the severe bearing wear problem of single-stator cylindrical motors, it is easy to conceive of making the inner and outer stators of equal length and aligning them, thus achieving complete mirror symmetry between the inner and outer magnetic fields of the mover, thereby ensuring that the radial electromagnetic forces are equal in magnitude and opposite in direction, canceling each other out. However, to achieve complete cancellation of radial electromagnetic forces, the physical prerequisites are that the iron cores of the inner and outer stators must be of equal axial length and aligned, with the same number of poles, the same pole pitch, and consistent winding arrangement, and that the axial distribution of the air gap magnetic flux density is completely consistent. This creates a technical bias against double-stator linear motors. Regarding traditional solutions to end-effects, the industry has mature optimization methods, such as segmenting magnets or skewing magnet poles on the magnet side, or circumferentially misaligning the windings on the winding side, or using current compensation algorithms. Therefore, it can be seen that the core idea of ​​this application is to reduce the end effect of linear motors by staggering the ends of the inner and outer stators, thus overcoming the technical bias in this field against linear motors with inner and outer double stators.

[0039] It should be noted that this application does not limit the specific setting of the axial projection misalignment. For example, in some embodiments of this application, each end face of the first stator 1 is misaligned with the corresponding end face of the second stator 3 in the axial projection position of the mover 2. This setting ensures that when the mover 2 moves to either end in the axial direction, and when part of the mover 2 is located in the misaligned area, thrust can be provided by one of the stators, avoiding the problem of sudden drop in end thrust and ensuring that the problem of sudden change in end thrust can be improved in both directions of the mover 2's movement.

[0040] In some embodiments of this application, please refer to Figure 7 The first stator 1 and the second stator 3 have different axial lengths; the axial projection area of ​​the first stator 1 is entirely located inside the axial projection area of ​​the second stator 3. In this embodiment, the axial length of the first stator 1 is less than the axial length of the second stator 3, and the axial projection of the first stator 1 is completely located inside the second stator 3. That is, both ends of the second stator 3 extend beyond the ends of the first stator 1, which can avoid the problem of sudden drop in end thrust. The specific derivation process has been explained in detail in the above embodiments and will not be repeated here. Alternatively, please refer to the appendix. Figure 1 In some embodiments of this application, the axial projection area of ​​the second stator 3 is entirely located inside the axial projection area of ​​the first stator 1. In this embodiment, the axial length of the first stator 11 is less than the axial length of the second stator 33, which also avoids the problem of sudden drop in end thrust.

[0041] Please see Figure 8 In some embodiments of this application, the axial lengths of the first stator 1 and the second stator 3 are equal; the axial projection area of ​​the first stator 1 partially overlaps with the axial projection area of ​​the second stator 3. In this embodiment, the axial lengths of the first stator 1 and the second stator 3 are equal, that is, one end of the first stator 1 protrudes axially from the corresponding end face of the second stator 3, and the other end of the second stator 3 protrudes axially from the corresponding end face of the first stator 1. This avoids the problem of sudden drop in end thrust. The specific derivation process has been explained in detail in the above embodiments and will not be repeated here.

[0042] Please see Figure 9In some embodiments of this application, the axial lengths of the first stator 1 and the second stator 3 are different; the axial projection area of ​​the first stator 1 partially overlaps with the axial projection area of ​​the second stator 3. In this embodiment, although the axial lengths of the first stator 1 and the second stator 3 are different, since their projection areas still partially overlap, one end of the first stator 1 protrudes axially from the corresponding end face of the second stator 3, and the other end of the second stator 3 protrudes axially from the corresponding end face of the first stator 1. This also avoids the problem of sudden drop in end thrust. The specific derivation process has been explained in detail in the above embodiments and will not be repeated here.

[0043] In some embodiments of this application, please refer to Figure 10 The first stator 1 and the second stator 3 have different axial lengths; one end of the first stator 1 and the corresponding end of the second stator 3 are aligned in the axial direction; and the other end of the first stator 1 and the corresponding end of the second stator 3 are offset in the axial direction. In this embodiment, the alignment of one end of the first stator 1 and the second stator 3 and the offset of the other end can prevent a sudden drop in end thrust when the mover 2 partially protrudes from the offset end. The specific derivation process has been explained in the above embodiment and will not be repeated here.

[0044] Please refer to Figure 2 , Figure 4 and Figure 11 In some embodiments of this application, the first stator 1 includes a plurality of first core groups 11 and a plurality of first stator windings 12. Each first core group 11 includes a plurality of first stator cores 111 arranged axially. At least a portion of the first stator windings 12 are wound on the corresponding first stator cores 111. Taking the first stator 1 as a cylindrical shape as an example, the plurality of first core groups 11 are distributed circumferentially. The first stator windings 12 can be wound on each first stator core 111, or they can be wound around the periphery of the first core group 11 to generate a magnetic field. Correspondingly, the mover 2 is circumferentially disposed around the periphery of the first stator 1.

[0045] Please refer to Figure 2 , Figure 4 and Figure 14In this embodiment, the second stator 3 includes multiple second core groups 31 and multiple second stator windings 32. Each second core group 31 includes multiple second stator cores 311 arranged axially. At least a portion of the second stator windings 32 are wound on the corresponding second stator cores 311. Taking the second stator 3 as a cylindrical shape as an example, the multiple second core groups 31 are distributed circumferentially. The second stator windings 32 can be wound on each second stator core 311, or they can be wound around the periphery of the second core groups 31 to generate a magnetic field. Correspondingly, the mover 2 is circumferentially disposed around the inner periphery of the second stator 3.

[0046] Please see Figure 11 and Figure 12 , Figure 11 The diagram shows the structure of the first stator 1, in which multiple first core groups 11 are arranged circumferentially, and a first stator winding 12 is wound around its exterior. Each first core group 11 includes multiple first stator cores 111 arranged axially, and each first stator core 111 is formed by stacking multiple first stator core laminations 111a.

[0047] Please see Figure 14 and Figure 15 , Figure 14 The diagram shows the structure of the second stator 3, in which multiple second core groups 31 are arranged circumferentially, and a second stator winding 32 is wound around its exterior. Each second core group 31 includes multiple second stator cores 311 arranged axially, and each second stator core 311 is formed by stacking multiple second stator core laminations 311a.

[0048] In some embodiments of this application, a controller and a temperature sensor are also included. The controller is electrically connected to each of the first stator windings 12 and each of the second stator windings 32, respectively. The temperature sensor is used to detect the temperature of the first stator 1 and the second stator 3. The controller is signal-connected to the temperature sensor and is used to control the operating conditions of each of the first stator windings 12 and each of the second stator windings 32 according to the detection results of the temperature sensor, so as to regulate the axial force generated by the first stator 1 and the second stator 3 on the mover 2 respectively. In this embodiment, the linear motor suspension actuator 100 can independently control the operation of the first stator winding 12 and the second stator winding 32 according to the instantaneous temperatures of the first stator 1 and the second stator 3. For example, when the temperature of the first stator 1 is too high, the current in the first stator winding 12 can be appropriately reduced. Taking the thrust of the first stator 1 to the mover 2 as 0.8F, in order to maintain the overall thrust on the mover 2 unchanged, the current in the second stator winding 32 can be appropriately increased. For example, the thrust of the second stator 3 to the mover 2 can be increased to 1.2F, which can ensure that the thrust on the mover 2 remains unchanged after adjusting the operating conditions of the first stator winding 12 and the second stator winding 32.

[0049] It should be noted that the controller in the above embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, MCUs (Motor Control Units), BDCs (Body Domain Controllers), MDCs (Mobile Data Centers), PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals, etc., as well as fixed terminals such as digital TVs, desktop computers, etc.

[0050] In some embodiments of this application, the power supply lines of each first stator winding 12 and the power supply lines of each second stator winding 32 are connected in parallel in the power supply circuit. This allows the other stator to be controlled independently for adaptive adjustment when one of the first stator 1 or the second stator 3 malfunctions, preventing the linear motor suspension actuator 100 from completely failing.

[0051] Reference Figure 4 In some embodiments of this application, the axial dimension of the permanent magnet 21 is comparable to the axial dimension of the first stator core 111, and the axial dimension of the permanent magnet 21 is comparable to the axial dimension of the second stator core 311. Since the permeability of the core is greater than that of air, the magnetic flux is greatest at the core in the axial direction. Therefore, the size of the permanent magnet 21 is set to be comparable to the size of the first stator core 111 and the second stator core 311, so that the permanent magnet 21 at that location can obtain the maximum thrust. When the permanent magnet 21 corresponding to the core moves to the gap between the two cores, the direction of the current flowing into the first stator winding 12 and the second stator winding 32 can be switched. Since the polarities of the two adjacent permanent magnets 21 are opposite, the direction of the thrust on the mover 2 remains unchanged. In some embodiments of this application, the axial dimension of the permanent magnet 21 is equivalent to the gap between two adjacent first stator cores 111 along the axial direction, and the axial dimension of the permanent magnet 21 is equivalent to the gap between two adjacent second stator cores 311. In this embodiment, since the polarities of adjacent permanent magnets 21 are opposite, the permanent magnets 21 located at this location (i.e., the permanent magnets 21 corresponding to the gap between the two first stator cores 111) are subjected to opposite thrusts. However, since the magnetic flux at this location is small, it does not affect the overall direction of movement of the mover 2.

[0052] In the two embodiments described above, one or both solutions can be used. When both are used, the axial dimension of the permanent magnet 21 is equivalent to the dimensions of the first stator core 111 and the second stator core 311, and the gaps between two adjacent first stator cores 111 and between two adjacent second stator cores 311 are also equivalent. This allows for adaptation to the switching frequency of AC power.

[0053] Further reading Figure 16 In some embodiments of this application, the first stator 1 further includes a first non-magnetic ring 13, which is disposed in the gap between two adjacent first stator cores 111 and is located away from the mover 2. It should be noted that the first non-magnetic ring 13 can isolate the magnetic field, thereby reducing the influence of leaked magnetic fields on the outside environment, and facilitating the concentration of the magnetic field to the first stator core 111. See also... Figure 17 In other embodiments of this application, the second stator 3 further includes a second non-magnetic ring 33, which is disposed in the gap between two adjacent second stator cores 311 and is located away from the mover 2. In this embodiment, the second non-magnetic ring 33 can isolate the magnetic field, thereby reducing the influence of the leaked magnetic field on the outside world, and facilitating the concentration of the magnetic field to the second stator core 311. It should be noted that the solutions in the above two embodiments can be used selectively or simultaneously, and this application does not impose specific limitations.

[0054] The following provides an exemplary operating mode of the linear motor suspension actuator 100 proposed in this application. Taking an embodiment where the two ends of the first stator 1 protrude from the two ends of the second stator 3 respectively as an example, when the first stator winding 12 and the second stator winding 32 are energized, the first stator winding 12 and the second stator winding 32 generate magnetic fields in the same direction at the permanent magnet 21. The permanent magnet 21 corresponding to the iron core will be subjected to an axial thrust, and the permanent magnet 21 corresponding to the iron core gap will be subjected to an opposite thrust. However, since the magnetic flux of the permanent magnet 21 located at the gap is smaller, it generates... The opposing thrust is smaller, so the overall thrust direction remains unchanged, driving the mover 2 to move axially; when the permanent magnet 21 moves axially a distance equal to the size of the permanent magnet 21, the polarity direction of the permanent magnet 21 located at the iron core changes, and the current direction of the first stator winding 12 and the second stator winding 32 changes, so the thrust direction of the permanent magnet 21 located at the iron core remains unchanged; when the mover 2 runs to the end, in this embodiment, since there is only a sudden drop in thrust provided by the second stator 3, the first stator 1 will still provide thrust to the mover 2, thus reducing the sudden change in thrust at the end.

[0055] This application also proposes a vehicle, which includes a chassis and a linear motor suspension actuator 100 mounted on the chassis. The specific structure of the linear motor suspension actuator 100 is as described in the above embodiments. Since this vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0056] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A linear motor suspension actuator (100), comprising a mover (2) and a first stator (1) and a second stator (3) respectively disposed on its inner and outer sides, wherein the first stator (1) and the second stator (3) are both used to drive the mover (2) to move along its axial direction; characterized in that, At least one end of the first stator (1) and at least one end of the second stator (3) are offset from each other in the axial projection position of the mover (2).

2. The linear motor suspension actuator (100) according to claim 1, characterized in that, Each end face of the first stator (1) is offset from the corresponding end face of the second stator (3) in the axial projection position of the mover (2).

3. The linear motor suspension actuator (100) according to claim 2, characterized in that, The first stator (1) and the second stator (3) have the same axial length; The axial projection area of ​​the first stator (1) partially overlaps with the axial projection area of ​​the second stator (3).

4. The linear motor suspension actuator (100) according to claim 2, characterized in that, The first stator (1) and the second stator (3) have different axial lengths; The axial projection area of ​​the first stator (1) partially overlaps with the axial projection area of ​​the second stator (3).

5. The linear motor suspension actuator (100) according to claim 2, characterized in that, The first stator (1) and the second stator (3) have different axial lengths: Wherein, the projection area of ​​the first stator (1) in the axial direction is entirely located inside the projection area of ​​the second stator (3) in the axial direction; Alternatively, the projection area of ​​the second stator (3) in the axial direction is entirely located inside the projection area of ​​the first stator (1) in the axial direction.

6. The linear motor suspension actuator (100) according to claim 1, characterized in that, The first stator (1) and the second stator (3) have different axial lengths; One end of the first stator (1) is aligned with the corresponding end of the second stator (3) in the axial projection position of their end faces; and the other end of the first stator (1) is offset from the corresponding end of the second stator (3) in the axial projection position of their end faces.

7. The linear motor suspension actuator (100) according to any one of claims 1-6, characterized in that, The first stator (1) includes a plurality of first core groups (11) and a plurality of first stator windings (12), and each first core group (11) includes a plurality of first stator cores (111) arranged axially; At least a portion of the first stator windings (12) are wound on the corresponding first stator cores (111); The second stator (3) includes multiple second core groups (31) and multiple second stator windings (32), and each second core group (31) includes multiple second stator cores (311) arranged axially; At least a portion of the second stator windings (32) are wound on the corresponding second stator cores (311).

8. The linear motor suspension actuator (100) according to claim 7, characterized in that, It also includes a controller and a temperature sensor, the controller being electrically connected to each of the first stator windings (12) and each of the second stator windings (32), and the temperature sensor being used to detect the temperature of the first stator (1) and the second stator (3); The controller is connected to the temperature sensor signal and is used to control the working conditions of each first stator winding (12) and each second stator winding (32) according to the detection result of the temperature sensor, so as to regulate the axial force generated by the first stator (1) and the second stator (3) on the mover (2).

9. The linear motor suspension actuator (100) according to claim 7, characterized in that, The power supply lines of each of the first stator windings (12) and the power supply lines of each of the second stator windings (32) are connected in parallel in the power supply circuit.

10. A vehicle, comprising a chassis, characterized in that, It also includes a linear motor suspension actuator (100) as described in any one of claims 1-9, which is mounted on the chassis.

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