Iron core, primary component, linear motor, suspension structure and vehicle

Abstract

An iron core, a primary component, a linear motor, a suspension structure, and a vehicle. The iron core is provided with a plurality of isolation slots spaced apart from each other in the circumferential direction of the iron core, and the number N of isolation slots satisfies: 20≤N≤90.

Description

Iron core, primary components, linear motor, suspension structure and vehicle

[0001] This application claims priority to Chinese patent application No. 202411982691.X, filed on December 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicle technology, and more particularly to an iron core, a primary component, a linear motor, a suspension structure, and a vehicle. Background Technology

[0003] A linear motor typically consists of a stator assembly and a mover assembly. One of the mover and stator assemblies includes a permanent magnet, while the other includes an iron core and a coil wound around the iron core. By energizing the coil, an induced magnetic field is generated, which in turn causes the coil and the permanent magnet to exert a linear thrust on the mover assembly through electromagnetic induction, thereby causing the stator and mover assemblies to move in a linear fashion relative to each other. Summary of the Invention

[0004] This disclosure provides a core, a primary component, a linear motor, a suspension structure, and a vehicle.

[0005] In a first aspect, an iron core is provided. The iron core has a plurality of blocking grooves spaced apart along the circumference of the iron core, and the number N of the plurality of blocking grooves satisfies: 20≤N≤90.

[0006] Secondly, a primary assembly is provided. This primary assembly includes a plurality of the aforementioned iron cores and a coil. The plurality of iron cores are arranged axially along the iron core axis, and a receiving slot is formed between two adjacent iron cores; at least a portion of the coil is received within the receiving slot.

[0007] Thirdly, a linear motor is provided. This linear motor includes the aforementioned primary component and secondary component. The secondary component is sleeved on the outer periphery of the primary component, and the secondary component and the primary component reciprocate relative to each other along the axial direction of the iron core.

[0008] Fourthly, a suspension structure is provided. This suspension structure includes the aforementioned linear motor, wishbone, and top cover. The wishbone is connected to the secondary assembly; the top cover is connected to the primary assembly.

[0009] Fifthly, a vehicle is provided. The vehicle includes the aforementioned iron core, or the aforementioned primary component, or the aforementioned linear motor, or the aforementioned suspension structure. Attached Figure Description

[0010] Figure 1 is a structural schematic diagram of a vehicle according to some embodiments of the present disclosure;

[0011] Figure 2 is a front view of the suspension structure in the vehicle shown in Figure 1 according to some embodiments of the present disclosure;

[0012] Figure 3 is a cross-sectional view along line AA of the suspension structure shown in Figure 2 according to some embodiments of the present disclosure;

[0013] Figure 4 is a partial enlarged view of circle B in Figure 3 according to some embodiments of the present disclosure;

[0014] Figure 5 is a partial structural diagram of the iron core in the relevant technology;

[0015] Figure 6 is a top view of the iron core shown in Figure 5;

[0016] Figure 7 is a schematic diagram of the structure of multiple iron cores according to some embodiments of the present disclosure;

[0017] Figure 8 is a partial structural schematic diagram of an iron core according to some embodiments of the present disclosure;

[0018] Figure 9 is a top view of the iron core in Figure 8;

[0019] Figure 10 is a schematic diagram of the eddy current path when the iron core is not provided with the blocking groove according to some embodiments of the present disclosure;

[0020] Figure 11 is a schematic diagram of the eddy current path when the iron core is provided with a barrier groove according to some embodiments of the present disclosure;

[0021] Figure 12 is a schematic diagram of the stator eddy current loop without the setting of the blocking groove in the related technology;

[0022] Figure 13 is a schematic diagram of a stator eddy current loop with 12 blocking slots according to some embodiments of the present disclosure;

[0023] Figure 14 is a simulation diagram of eddy current loss of an iron core with a number of barrier slots N of 0 according to some embodiments of the present disclosure.

[0024] Figure 15 is a simulation diagram of eddy current loss of an iron core with a number of N barriers of 36 according to some embodiments of the present disclosure.

[0025] Figure 16 is a simulation diagram of eddy current loss of an iron core with a number of N barriers of 90 according to some embodiments of the present disclosure.

[0026] Figure 17 is a graph showing the relationship between eddy current loss and the number of blocking slots according to some embodiments of the present disclosure;

[0027] Figure 18 is a simulation diagram of eddy current loss of an iron core with a number of N barriers of 72 according to some embodiments of the present disclosure.

[0028] Figure 19 is a schematic diagram of the structure of an iron core according to some embodiments of the present disclosure;

[0029] Figure 20 is a simulation result of the electric motor thrust varying with A / (A+B) according to some embodiments of the present disclosure;

[0030] Figure 21 is a magnetic flux density simulation diagram of the primary component when the width W of the barrier groove is 0.5 mm according to some embodiments of the present disclosure;

[0031] Figure 22 is a magnetic flux density simulation diagram of the primary component when the width W of the barrier groove is 2 mm according to some embodiments of the present disclosure;

[0032] Figure 23 shows the simulation results of the motor thrust varying with the width W of the barrier slot according to some embodiments of the present disclosure;

[0033] Figure 24 is a MAP diagram of motor efficiency when the iron core is not provided with barrier slots according to some embodiments of the present disclosure;

[0034] Figure 25 is a MAP diagram of motor efficiency when the iron core is provided with barrier slots according to some embodiments of the present disclosure;

[0035] Figure 26 is a comparison of the highest motor efficiency when the iron core is provided with blocking slots according to some embodiments of the present disclosure and when the iron core is not provided with blocking slots;

[0036] Figure 27 is a graph showing the relationship between motor thrust and motor speed when the iron core is provided with a blocking slot and when the iron core is not provided with a blocking slot, according to some embodiments of the present disclosure.

[0037] Figure 28 is a top view of an iron core according to some embodiments of the present disclosure;

[0038] Figure 29 is a partial structural schematic diagram of an iron core with a barrier slot according to some embodiments of the present disclosure.

[0039] Figure 30 is a top view of various iron cores according to some embodiments of the present disclosure;

[0040] Figure 31 is a simulation diagram of eddy current loss of an iron core without a barrier gap according to some embodiments of the present disclosure;

[0041] Figure 32 is a simulation diagram of eddy current loss of an iron core with the barrier slot shown in (2) of Figure 30 according to some embodiments of the present disclosure;

[0042] Figure 33 is a simulation diagram of eddy current loss of an iron core with the barrier slot shown in (3) of Figure 30 according to some embodiments of the present disclosure;

[0043] Figure 34 is a simulation diagram of eddy current loss of an iron core with the barrier slot shown in (4) of Figure 30 according to some embodiments of the present disclosure;

[0044] Figure 35 is a comparison diagram of eddy current losses of iron cores corresponding to the shapes of the barrier slots and barrier grooves according to some embodiments of the present disclosure.

[0045] Figure 36 is a simulation diagram of eddy current loss of an iron core without a barrier gap according to some embodiments of the present disclosure.

[0046] Figure 37 is a simulation diagram of eddy current loss of an iron core with a barrier slot according to some embodiments of the present disclosure.

[0047] Figure 38 is a comparison diagram of eddy current losses of iron cores with and without barrier gaps according to some embodiments of the present disclosure.

[0048] Reference numerals: 1000, vehicle; 100, body; 200, wheel; 300, suspension structure; 10, linear motor; 20, wishbone; 30, top cover; 40, elastic element; 1, cylinder; 11, support; 2, secondary component; 21, magnetic component; 3, center component; 4, primary component; 4A, magnetic component; 41, iron core; 411, mounting hole; 412, barrier groove; 4121, first barrier groove; 4122, second barrier groove; 413, yoke; 414, tooth; 4141, tooth center; 4142, boot; 415, barrier slot; 4151, first barrier slot; 4152, second barrier slot; 42, coil; 43, receiving slot. Detailed Implementation

[0049] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. However, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0050] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0051] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0053] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, 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, 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, article, or apparatus that includes that element.

[0054] In this disclosure, the terms "exemplarily" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplarily" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0055] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0056] This disclosure provides a vehicle 1000 through several embodiments. The vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a gasoline-powered vehicle, etc. The vehicle 1000 can also be a sedan, truck, bus, lorry, trailer, etc.

[0057] Please refer to Figure 1. The vehicle 1000 includes a body 100 and wheels 200. The body 100 is used for passengers to ride in and for carrying goods. The wheels 200 are mounted under the body 100 to support the body 100 and are able to roll on the road surface so that the vehicle 1000 can move.

[0058] The vehicle 1000 also includes a suspension structure 300. The suspension structure 300 is located between the vehicle body 100 and the wheels 200, and is used to transmit the forces and torques acting between the vehicle body 100 and the wheels 200, as well as to buffer the impact forces experienced by the vehicle body 100 during vehicle operation, to ensure stable vehicle operation. The suspension structure 300 can be a non-independent suspension structure, an independent suspension structure, or an active suspension structure.

[0059] In some embodiments, the suspension structure 300 is an active suspension structure. The stiffness and damping characteristics of the active suspension structure are dynamically and adaptively adjusted according to the driving conditions of the vehicle 1000 (such as the motion state of the vehicle 1000 and the road conditions) to ensure that the suspension structure 300 is always in the optimal damping state. For example, referring to Figure 2, the suspension structure 300 may include a linear motor 10, a wishbone 20, a top cover 30, a support member 11, and an elastic element 40. In some other examples, the suspension structure 300 may not include the support member 11 and the elastic element 40.

[0060] The fork arm 20 and the top cover 30 are respectively connected to opposite ends of the linear motor 10. The linear motor 10 drives the fork arm 20 and the top cover 30 to move relative to each other in a direction away from or close to each other, so as to adjust the relative displacement between the top cover 30 and the fork arm 20. One of the fork arm 20 and the top cover 30 is connected to the vehicle body 100, and the other of the fork arm 20 and the top cover 30 is connected to the wheel 200. That is, if the fork arm 20 is connected to the vehicle body 100, then the top cover 30 is connected to the wheel 200; if the fork arm 20 is connected to the wheel 200, then the top cover 30 is connected to the vehicle body 100.

[0061] In this way, by adjusting the relative displacement between the top cover 30 and the fork arm 20 using the linear motor 10, the relative displacement between the vehicle body 100 and the wheel 200 can be adjusted. Thus, when encountering uneven roads or turns, the distance between the vehicle body 100 and the wheel 200 can be adjusted using the linear motor 10 to maintain the balance of the vehicle body 100 and improve the performance of the vehicle 1000.

[0062] Please refer to Figure 2. The linear motor 10 includes a secondary component 2, and a support member 11 is fixedly mounted on the secondary component 2. For example, the secondary component 2 includes a cylinder 1, and the support member 11 is fixedly mounted on the outer peripheral wall of the cylinder 1. An elastic element 40 is disposed between the support member 11 and the top cover 30. For example, the elastic element 40 abuts against both the support member 11 and the top cover 30, meaning that the elastic element 40 is in a compressed state under the clamping of the support member 11 and the top cover 30. The elastic element 40 may or may not be connected to the cylinder 1 and the top cover 30.

[0063] When the linear motor 10 adjusts the relative displacement between the top cover 30 and the fork arm 20, the elastic element 40 extends and retracts with the relative movement of the top cover 30 and the fork arm 20. This allows adjustment of the cushioning performance of the elastic element 40 to meet the cushioning requirements of the vehicle 1000, thereby further improving the performance of the vehicle 1000. For example, the elastic element 40 can be a spring, a rubber column, a latex column, etc. Some embodiments of this disclosure are illustrated using a spring as the elastic element 40.

[0064] The structure of the linear motor 10 is described below.

[0065] In some embodiments, referring to FIG3, the linear motor 10 includes a secondary component 2 and a primary component 4. The secondary component 2 is sleeved on the outer periphery of the primary component 4, and the secondary component 2 and the primary component 4 reciprocate relative to each other along the axial direction of the iron core 41. The fork arm 20 is connected to the secondary component 2, and the top cover 30 is connected to the primary component 4. By moving the secondary component 2 relative to the primary component 4 along the axial direction of the linear motor 10, the fork arm 20 and the top cover 30 can be driven to move relative to each other along the axial direction of the linear motor 10, thereby adjusting the relative displacement between the vehicle body 100 and the wheel 200, as well as the buffering performance of the elastic element 40.

[0066] Please continue referring to Figure 3. The primary component 4 includes a central member 3 and a magnetic component 4A. A portion of the central member 3 is located within the cylinder 1, and the central member 3 is capable of sliding relative to the cylinder 1 along its axial direction. For example, a linear bearing can be provided at the port of the cylinder 1, and the central member 3 is slidably connected to the linear bearing. The central member 3 can be a rod-shaped structure, a plate-shaped structure, or other irregular structures, etc., and this disclosure does not limit this. Some embodiments of this disclosure are illustrated by using a rod-shaped structure for the central member 3.

[0067] Magnetic component 4A is sleeved on the central member 3. That is, magnetic component 4A is connected to the central member 3 and is arranged along the circumference of the central member 3. For example, referring to Figure 4, magnetic component 4A includes an iron core 41 and a coil 42, with the iron core 41 sleeved on the central member 3. The iron core 41 has a mounting hole 411, the axis of which is aligned with the axis of the cylinder 1. The central member 3 passes through the mounting hole 411 and is connected to the iron core 41.

[0068] For example, the portion of the center member 3 located inside the cylinder 1 passes through the mounting hole 411. The center member 3 can be interference-fitted with the iron core 41, or two limiting members, such as limiting protrusions or limiting bolts that can move along the axial direction of the cylinder 1, can be provided on the center member 3. The iron core 41 is placed between the two limiting members, and the iron core 41 is clamped by the two limiting members to connect the iron core 41 to the center member 3.

[0069] In some examples, the magnetic assembly 4A includes a plurality of iron cores 41. The plurality of iron cores 41 are arranged along the axial direction of the iron cores 41 (i.e., the axial direction of the cylinder 1). In this case, the plurality of iron cores 41 can contact each other sequentially and are positioned between two limiting members, which fix the plurality of iron cores 41 to the center member 3.

[0070] A receiving groove 43 is formed between two adjacent iron cores 41, and at least a portion of the coil 42 is received within the receiving groove 43. The receiving groove 43 extends circumferentially along the mounting hole 411. The number of coils 42 can be one or more. Some embodiments of this disclosure are illustrated by way of multiple coils 42. Receiving grooves 43 are formed between any two adjacent iron cores 41, i.e., the number of receiving grooves 43 is also multiple, and one coil 42 is received within one receiving groove 43. Furthermore, the coil 42 extends circumferentially along the mounting hole 411.

[0071] In some other examples, the primary component 4 may also include an iron core 41 that extends axially along the cylinder 1 and has a plurality of receiving grooves 43 spaced apart axially along the cylinder 1.

[0072] Some embodiments of this disclosure are illustrated using a primary component 4 comprising a plurality of iron cores 41 as an example.

[0073] Please refer to Figure 4. The secondary component 2 also includes a magnetic component 21. The magnetic component 21 is fixedly disposed on the inner circumference of the cylinder 1, and is located between the cylinder 1 and the primary component 4. That is, the magnetic component 21 is located on the outer circumference of the primary component 4. The magnetic component 21 can be a ring structure, with the iron core 41 and the coil 42 respectively passing through it. For example, the magnetic component 21 can be a permanent magnet, an electromagnet, an energized coil, etc.

[0074] In some examples, there are multiple magnetic elements 21. Multiple magnetic elements 21 are arranged along the axial direction of the cylinder 1.

[0075] In some embodiments of this disclosure, with the above-described configuration, after the coil 42 is energized, a magnetic field can be generated between the coil 42 and the magnetic component 21, and the direction of the Lorentz force of this magnetic field is along the axial direction of the cylinder 1. This generates an interaction force along the axial direction of the cylinder 1 between the central component 3 and the cylinder 1, thereby pushing the central component 3 and the cylinder 1 to move relative to each other along the axial direction of the cylinder 1. Furthermore, the direction of the interaction force between the central component 3 and the cylinder 1 can be controlled by changing the direction of the current flow in the coil 42.

[0076] Based on this, please continue to refer to Figure 3, where the top cover 30 is connected to the center component 3. For example, the top cover 30 is connected to the portion of the center component 3 located on the outer side of the cylinder 1. The top cover 30 and the center component 3 can be connected by welding, snap-fitting, screwing, or other means, and this disclosure does not limit the connection in this regard.

[0077] The fork arm 20 is connected to the cylinder 1. For example, the fork arm 20 is connected to the end of the cylinder 1 that is opposite to the top cover 30. The fork arm 20 and the cylinder 1 can be connected by welding, snap-fitting, screwing, or other means, and this disclosure does not limit the connection.

[0078] By sliding the cylinder 1 relative to the center member 3, the top cover 30 and the fork arm 20 can move relative to each other, thereby adjusting the relative displacement between the top cover 30 and the fork arm 20, and thus adjusting the distance between the vehicle body 100 and the wheel 200. Furthermore, when the cylinder 1 and the center member 3 slide relative to each other, the cylinder 1 and the top cover 30 also move relative to each other, thereby causing the elastic element 40 to extend and retract, thus adjusting the cushioning performance of the elastic element 40.

[0079] In some embodiments, the core 41 can be pure iron. For example, the core 41 can be a solid pure iron structure. Since pure iron does not contain any alloying elements, it has low coercivity and high permeability, which helps to enhance the effect of the electromagnetic field, thereby improving the performance of the motor.

[0080] However, the magnetic field lines of the induced magnetic field generated after the coil 42 is energized will be conducted within the iron core 41 to enhance the strength of the induced magnetic field. However, due to the low resistivity of pure iron, when the magnetic field in the iron core changes, large eddy currents will be generated in the iron core. These eddy currents will consume electrical energy and generate heat, thereby reducing the efficiency of the motor and increasing energy consumption, which in turn affects the efficiency and high-speed thrust of the linear motor 10.

[0081] Eddy currents are electric currents that flow in a vortex-like pattern around magnetic field lines in a plane perpendicular to the direction of magnetic flux. A reduction in eddy currents means that the current flows more smoothly in a conductor, reducing unnecessary energy loss. Eddy currents generate heat loss through the resistance of the eddy current loop, known as eddy current loss.

[0082] Please refer to Figures 5, 6, 7, 8 and 9. In order to reduce the eddy current loss of the iron core 41, the iron core 41 is provided with a blocking groove 412, which can be provided on the periphery of the mounting hole 411.

[0083] Along the axial direction of the mounting hole 411, the barrier groove 412 can be recessed from one side surface of the iron core 41 to the other side surface of the iron core 41. For example, the barrier groove 412 can penetrate the iron core along the axial direction of the mounting hole 411.

[0084] As shown in Figures 10 and 11, when the core 41 is not equipped with the blocking groove 412, the eddy currents generated by the magnetic lines of force rotate around the mounting hole 411 in the circumferential direction. However, after the blocking groove 412 is provided in the core 41, when magnetic lines of force flow through the core 41, the eddy currents generated by the magnetic lines of force can be interrupted by the blocking groove 412 in the circumferential direction of the mounting hole 411, thereby breaking down the larger eddy currents generated by the magnetic lines of force into smaller eddy currents. In this way, the eddy current loss of the core 41 can be reduced, thereby improving the working efficiency of the linear motor 10 and enhancing its working performance.

[0085] In some embodiments, N blocking grooves 412 may be provided, and the N blocking grooves 412 are distributed at intervals along the circumference of the iron core 41. N can be a positive integer. For example, the number of blocking grooves 412 can be 10, 15, 20, 25, 30 or 35, etc.

[0086] For example, the plurality of blocking slots 412 can be evenly distributed along the circumference of the iron core 41, and the included angle formed by any two adjacent blocking slots is 360° / N. For example, the iron core 41 can be provided with 20 blocking slots 412, which are evenly distributed along the circumference of the iron core 41, that is, the included angle between any two adjacent blocking slots 412 is 18 degrees.

[0087] Thus, in the circumferential direction of the mounting hole 411, the eddy currents generated by the magnetic lines of force can be interrupted by the uniformly arranged blocking grooves 412, which helps to improve the uniformity of the turbine wear of the iron core 41, thereby ensuring the stability of the linear motor 10 operation.

[0088] In some embodiments, referring to Figures 8 and 9, the core 41 includes a yoke 413 and a toothed portion 414. The yoke 413 and the toothed portion 414 are connected, and the yoke 413 has a mounting hole 411. For example, the yoke 413 can be an annular or cylindrical structure. The toothed portion 414 is located on the outer periphery of the mounting hole 411 and is connected to the yoke 413. For example, the toothed portion 414 extends circumferentially along the mounting hole 411. That is, the toothed portion 414 can also be annular.

[0089] In some embodiments, as shown in Figures 8 and 9, the tooth 414 may include a tooth center 4141 and a boot portion 4142, the tooth center 4141 being connected between the boot portion 4142 and the yoke portion 413, and the boot portion 4142 being located on the outer periphery of the tooth center 4141.

[0090] In some examples, the thickness of the shoe portion 4142 (i.e., its height in the Z direction in Figure 8) along the axial direction of the mounting hole 411 can be greater than the thickness of the tooth portion 4141. This can enhance the overall structural strength and stability of the core 41, and also help optimize the magnetic circuit, reduce magnetic resistance, and increase magnetic flux.

[0091] In some examples, along the axial direction of the mounting hole 411, the thickness of the yoke 413 (i.e., the height in the Z direction in Figure 8) can be greater than the thickness of the tooth 414. In this way, after multiple iron cores 41 are sequentially mounted on the center member 3, when the yokes 413 of two adjacent iron cores 41 come into contact, a gap can be formed between the teeth 414 of the two adjacent iron cores 41, thereby forming a receiving groove 43 between the teeth 414 of the two stators.

[0092] In some embodiments, the barrier groove 412 extends along the inner edge of the tooth 414 toward the outer edge of the tooth.

[0093] In some embodiments, the blocking groove 412 may extend radially along the tooth portion 414. In some embodiments, the blocking groove 412 may also extend along a first direction, the angle between the first direction and the radial direction of the tooth portion 414 being greater than 0° and less than 90°. For example, the angle between the first direction and the radial direction of the tooth portion 414 may be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc.

[0094] For example, the barrier groove 412 can be a straight groove, a trapezoidal groove, an arc groove, a wavy groove, or an irregular groove. The radial direction of the tooth 414 is consistent with the radial direction of the mounting hole 411 and the radial direction of the yoke 413.

[0095] By extending the blocking groove 412 along the inner edge of the tooth 414 toward the outer edge of the tooth 414, the blocking groove 412 can have a certain length, thereby enabling the blocking groove 412 to interrupt more eddy currents and further reduce the eddy current loss of the iron core 41.

[0096] Please refer to Figures 12 and 13. Research shows that the ratio of eddy current loss with N number of blocking grooves 412 to eddy current loss without blocking grooves is [value missing].

[0097] Wherein, Ф is the magnetic flux through the primary component 4; N is the number of blocking slots 412; Ra is the equivalent resistance of the radial eddy current path; and Rb is the equivalent resistance of the tangential average radius eddy current path.

[0098] It can be seen that the more blocking grooves 412 are set, the better the eddy current suppression effect. When Ra is greater than Rb, the effect of setting blocking grooves 412 on eddy current suppression is the most obvious; however, if Rb is much greater than Ra, the number of blocking grooves 412 is small, and a good suppression effect cannot be achieved. Only by setting a large number of blocking grooves 412 can eddy current loss be suppressed.

[0099] Therefore, in some embodiments, the number N of the barrier grooves 412 satisfies: 20 ≤ N ≤ 90. For example, the number N of the barrier grooves 412 can be 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, etc., and this disclosure does not limit it.

[0100] As shown in Figures 14, 15, and 16, when the number of blocking grooves 412 is 0, the eddy current loss is very severe in most areas of the tooth 414 and the yoke 413, with eddy current loss almost covering both the tooth 414 and the yoke 413. When the number of blocking grooves 412 is 36, the eddy current loss in the tooth 414 and the yoke 413 decreases, with the eddy current loss mainly concentrated at the ends of the blocking grooves 412 on the tooth 414 and the yoke 413. When the number of blocking grooves 412 is 90, the eddy current loss in the tooth 414 and the yoke 413 is relatively small, with the eddy current loss mainly concentrated at the connection between the tooth 414 and the yoke 413 and at the ends of the blocking grooves 412 on the tooth 414.

[0101] Figure 17 uses a test sample with a mounting hole 411 diameter of 60 mm and a core 41 diameter (i.e., the sum of the radial dimensions of the yoke 413, the radial dimensions of the tooth 414, and the diameter of the mounting hole 411) of 110 mm. In this case, Rb is much larger than Ra. As shown in Figure 17, when the number N of the blocking grooves 412 is less than 20, the eddy current loss remains basically unchanged. Only when the number N of the blocking grooves 412 is greater than 20 does it have a significant suppression effect, which is consistent with the above theory (formula).

[0102] For example, when the number of blocking slots 412 is 0, the eddy current loss is approximately 21240W, while when the number of blocking slots 412 N is 20, the eddy current loss is approximately 19870W. When the number of blocking slots 412 N is 40, the eddy current loss is approximately 15500W. Increasing N from 20 to 40 reduces the eddy current loss by 4500W, while increasing N from 0 to 20 reduces it by 1370W. Therefore, in some embodiments of this disclosure, the number of blocking slots 412 N in the core 41 is greater than or equal to 20. Increasing the number of blocking slots 412 can significantly reduce eddy current loss, avoiding a poor effect in reducing eddy current loss due to a small number of blocking slots 412.

[0103] Furthermore, as shown in Figures 16 and 17, when the number N of the blocking grooves 412 is 90, the eddy current loss is 6276W, which is relatively small. If the number of blocking grooves 412 is further increased, the reduction in eddy current loss is not significant, and the processing efficiency will decrease due to an excessive number of blocking grooves 412. Therefore, some embodiments of this disclosure achieve this by ensuring that the number N of the blocking grooves 412 satisfies: 20≤N≤90, thereby significantly reducing eddy current loss by increasing the number of blocking grooves 412 and avoiding high manufacturing difficulty for the iron core 41.

[0104] In some embodiments, the number N of the barrier grooves 412 satisfies: 60 ≤ N ≤ 80. For example, the number N of the barrier grooves 412 can be 80, 75, 70, 65, 60, etc., and this disclosure does not limit it.

[0105] As shown in Figure 17, when the number N of the blocking slots 412 is less than 60, the eddy current loss is approximately 10500W or more, which is relatively high. When the number N of the blocking slots 412 is greater than 80, the change in eddy current loss with increasing number of blocking slots 412 becomes slow. For example, when the number N of the blocking slots 412 is 80, the eddy current loss is approximately 6500W, while when the number N of the blocking slots 412 is 100, the eddy current loss is approximately 5700W. Increasing N from 80 to 100 reduces the eddy current loss by 800W. Thus, when the number N of the blocking slots 412 is greater than 80, further increasing the number of blocking slots 412 does not significantly reduce eddy current loss, resulting in low returns. Therefore, in some embodiments of this disclosure, the number N of the blocking slots 412 satisfies 60 ≤ N ≤ 80, ensuring a high return on eddy current loss due to the arrangement of the blocking slots 412, thereby reducing production costs and significantly improving the performance of the motor 10.

[0106] Please refer to Figure 18. In some embodiments, the number N of the barrier grooves 412 is 72.

[0107] As shown in Figure 17, after N=72, the curve becomes relatively flat. Continuing to increase the number of blocking grooves 412 would undoubtedly increase production costs, thus the benefits of further increasing the number of blocking grooves are relatively low. As shown in Figures 16 and 18, when N=72, the eddy current losses of the tooth 414 and yoke 413 are relatively small. Eddy current losses are mainly concentrated at the connection between the tooth 414 and yoke 413, and at the ends of the blocking grooves 412 on the tooth 414. The eddy current loss distribution in Figure 18 when N=72 is basically the same as that in Figure 16 when N=90. Therefore, some embodiments of this disclosure, by setting the number of blocking grooves 412 N to 72, can ensure relatively high benefits from providing blocking grooves 412 on the iron core 41.

[0108] Research revealed that the larger the proportion of the area of ​​the blocking groove 412 to the cross-sectional area of ​​the iron core 41, the smaller the volume of the primary component 4, the more saturated the magnetic field, and the smaller the thrust of the motor 10. Therefore, the proportion of the blocking groove 412 to the cross-sectional area of ​​the iron core 41 affects the thrust output of the motor 10. The cross-sectional area of ​​the iron core 41 refers to the area of ​​its radial section, which is perpendicular to the central axis of the iron core 41. The area of ​​the blocking groove 412 is its projected area onto the radial section of the iron core 41.

[0109] Therefore, in some embodiments, the sum of the orthographic projection areas of the plurality of barrier grooves 412 on the first projection plane is the first area A, and the orthographic projection area of ​​the iron core 41 on the first projection plane is the second area B. The first area A and the second area B satisfy: A ≤ 0.22 × (A + B). For example, A = 0.22 × (A + B), A = 0.2 × (A + B), A = 0.19 × (A + B), A = 0.17 × (A + B), or A = 0.11 × (A + B), etc., and this disclosure does not limit this. The first projection plane is a plane perpendicular to the central axis of the iron core 41.

[0110] Please refer to Figure 19. It can be understood that the first area A = L × W × N; L is the length of the barrier groove (the dimension of the barrier groove 412 along the radial direction of the iron core 41), W is the width of the barrier groove 412 (the dimension of the barrier groove 412 along the circumference of the iron core 41), and N is the number of barrier grooves 412.

[0111] The sum of the first area A and the second area B is: A + B = πR1 2 -πR2 2 Where R1 is the radius of the iron core 41 (i.e., the length from the outer surface of the tooth 414 to its central axis), and R2 is the radius of the mounting hole 411 of the iron core 41.

[0112] Therefore, if If the value is too large, it will result in too many missing parts of the iron core 41 (i.e., the orthographic projection area of ​​the barrier groove 412 on the first projection plane), thereby affecting the overall strength of the iron core 41.

[0113] In addition, Figure 20 uses L=24mm, N=72, R1=57mm, R2=27mm, the radial dimension (radius) of the boot part is 2.5mm, the radial dimension (radius) of the tooth part is 24mm, the radial dimension (radius) of the yoke part is 6mm, and the thickness of the yoke part is 6mm as the test sample.

[0114] As shown in Figure 20, as the value of A / (A+B) increases, the thrust of motor 10 decreases. This test result is consistent with the above theory (that is, the larger the area of ​​the barrier groove 412 is relative to the cross-sectional area of ​​the iron core 41, the more saturated the magnetic field is, and the smaller the thrust of motor 10 is).

[0115] Continue referring to Figure 20, in At that time, the thrust of motor 10 is approximately 5343 N; At that time, the thrust of motor 10 is approximately 4980N; At that time, the thrust of motor 10 is approximately 4542 N; At that time, the thrust of motor 10 is approximately 4036.

[0116] Thus, in When the value changes from 0.11 to 0.22, the thrust of motor 10 decreases by 363 N; When the value changes from 0.22 to 0.33, the thrust of motor 10 decreases by 438 N; When the value changes from 0.33 to 0.44, the thrust of motor 10 decreases by 506N.

[0117] Therefore, it can be known that in Then, continue to increase. The value of will cause a significant decrease in the thrust of motor 10.

[0118] In some embodiments of this disclosure, the first area A and the second area B satisfy the condition: A ≤ 0.22 × (A + B), that is... To keep the thrust of motor 10 in a higher range, and avoid An excessively large value can cause a sharp drop in the thrust of motor 10. Additionally, it can reduce the proportion of missing parts in the iron core 41, thereby ensuring the overall stability of the iron core 41.

[0119] Figure 23 also uses L=24mm, N=72, R1=57mm, R2=27mm, the radial dimension of the boot part 4142 is 2.5mm, the radial dimension of the tooth part 414 is 24mm, the radial dimension of the yoke part 413 is 6mm, and the thickness of the yoke part 413 is 6mm as the test sample.

[0120] It is understandable that the width W of the blocking groove 412 is proportional to the first area A, and the width W of the blocking groove 412 refers to the width of the blocking groove 412 along the circumference of the iron core 41.

[0121] As can be seen from Figures 21, 22 and 23, if the blocking groove 412 is wider and the area of ​​the blocking groove 412 is larger, the volume of the iron core 41 will be smaller and the magnetic field will be more saturated, resulting in a smaller thrust of the motor 10.

[0122] To ensure Taking L=24mm, N=72, R1=57mm, and R2=27mm as examples, in some embodiments of this disclosure, the width W of the barrier groove 412 along the circumference of the iron core 41 is ≤1mm. For example, W=1mm, W=0.9mm, W=0.8mm, W=0.7mm, W=0.6mm, W=0.5mm, W=0.4mm, W=0.3mm, etc., and this disclosure does not limit it.

[0123] Additionally, it should be noted that the smaller the width W of the barrier groove 412, the lower the processing efficiency of the iron core 41. Therefore, in some embodiments, the width W of the barrier groove 412 along the circumference of the iron core 41 is ≥0.3mm.

[0124] In this way, by limiting the width W of the barrier groove 412, some embodiments of this disclosure can ensure that the ratio of the first area A to the second area B is within a suitable range, thereby making the overall stability of the iron core 41 stronger, the thrust of the motor 10 higher, and improving production efficiency.

[0125] Please continue to refer to Figures 8 and 9. In some embodiments, the barrier groove 412 includes a first barrier groove 4121, which is disposed on the tooth portion 414. The first barrier groove 4121 can extend along the inner edge of the tooth portion 414 toward the outer edge of the tooth portion 414.

[0126] In some embodiments, the first blocking groove 4121 may extend radially along the tooth portion 414. In some embodiments, the first blocking groove 4121 may also extend along the first direction described above, which is not limited in this disclosure. Some embodiments of this disclosure are described with the example of the first blocking groove 4121 extending radially along the tooth portion 414.

[0127] In some examples, along the axial direction of the mounting hole 411, the first blocking groove 4121 can be recessed from one side surface of the tooth 414 to the other side surface of the tooth 414. By providing the first blocking groove 4121 in the tooth 414, when magnetic lines of force flow through the tooth 414, the first blocking groove 4121 can break the eddy currents formed by the magnetic lines of force in the tooth 414, thereby reducing the eddy current loss of the tooth 414, and further reducing the eddy current loss of the iron core 41, so as to improve the working efficiency of the linear motor 10 and enhance the working performance of the linear motor 10.

[0128] Multiple first blocking grooves 4121 can be provided, and the multiple first blocking grooves 4121 are arranged at intervals along the circumference of the mounting hole 411. By providing multiple first blocking grooves 4121, the eddy currents of the tooth 414 can be interrupted at multiple points, thereby further reducing the eddy current loss of the tooth 414, and further reducing the eddy current loss of the iron core 41.

[0129] In some examples, referring further to Figures 8 and 9, one end of the first blocking groove 4121 does not extend through the outer edge of the yoke 413. For example, the first blocking groove 4121 may extend through to the inner edge of the tooth 414, but not to the yoke 413. That is, the first blocking groove 4121 extends through to the inner edge of the tooth 4141.

[0130] For example, the tooth 414 is annular, and the first blocking groove 4121 extends radially along the tooth 414 to the inner edge of the tooth 4141 (as shown at position X1 in Figure 9). In this way, the eddy currents generated by the magnetic lines of force at the inner edge of the tooth 4141 can also be interrupted by the first blocking groove 4121, thereby further reducing the eddy current loss of the iron core 41.

[0131] Similarly, in some examples, the other end of the first blocking groove 4121 can also extend to the outer edge of the tooth 414, that is, the first blocking groove extends to the outer edge of the boot. In this way, the eddy currents generated by the magnetic lines of force at the outer edge of the boot 4142 can also be interrupted by the first blocking groove 4121, thereby allowing the first blocking groove 4121 to further reduce the eddy current loss of the iron core 41.

[0132] When multiple first blocking grooves are provided, all of the multiple first blocking grooves 4121 can penetrate to both the inner and outer edges of the tooth 414. Alternatively, all of the multiple first blocking grooves 4121 can penetrate to the outer edge of the tooth 414, with a portion of the multiple first blocking grooves 4121 penetrating to the inner edge of the tooth 414 and another portion not penetrating to the inner edge of the tooth 414. Alternatively, all of the multiple first blocking grooves 4121 can penetrate to the inner edge of the tooth 414, with a portion of the multiple first blocking grooves 4121 penetrating to the outer edge of the tooth 414 and another portion not penetrating to the outer edge of the tooth 414. This disclosure does not limit this. Some embodiments of this disclosure are described using the example of multiple first blocking grooves 4121 penetrating to both the inner and outer edges of the tooth 414.

[0133] In some embodiments, the blocking groove 412 further includes a second blocking groove 4122, a portion of which is disposed on the tooth portion 414. The second blocking groove 4122 is spaced apart from the first blocking groove 4121, and one end of the second blocking groove 4122 does not penetrate the outer edge of the tooth portion 414. For example, one end of the second blocking groove 4122 may be disposed on the tooth portion 414 and not penetrate the outer edge of the tooth portion 414, while the other end of the second blocking groove 4122 may penetrate to the inner edge of the tooth portion 414 and the outer edge of the yoke portion 413, extending to the yoke portion 413.

[0134] The second blocking groove 4122 may also extend along the direction from the inner edge of the tooth 414 to the outer edge of the tooth 414. In some embodiments, the second blocking groove 4122 may extend radially along the tooth 414. In some embodiments, the second blocking groove 4122 may also extend along a first direction, which will not be described in detail here, but can be referred to the above description of the blocking groove 412.

[0135] Thus, by extending the second blocking groove 4122 through the inner edge of the tooth 414 and the outer edge of the yoke 413 to the yoke 413, when magnetic lines of force flow through the yoke 413 and the tooth 414, the second blocking groove 4122 can break the eddy currents formed by the magnetic lines of force in the yoke 413 and the tooth 414, thereby reducing the eddy current losses in the yoke 413 and the tooth 414, and further reducing the eddy current losses in the iron core 41, thereby improving the working efficiency of the linear motor 10 and enhancing the working performance of the linear motor 10.

[0136] Multiple second blocking grooves 4122 can be provided, and the multiple second blocking grooves 4122 are arranged at intervals along the circumference of the mounting hole 411. By providing multiple second blocking grooves 4122, the eddy currents of the yoke 413 and the tooth 414 can be interrupted at multiple points, thereby further reducing the eddy current losses of the yoke 413 and the tooth 414, and further reducing the eddy current losses of the iron core 41.

[0137] In some examples, along the axial direction of the mounting hole 411, the second blocking groove 4122 can extend from one side of the yoke 413 to the other side of the yoke 413. This further increases the length of the second blocking groove 4122 in the axial direction of the mounting hole 411, thereby further reducing the eddy current loss of the core 41.

[0138] In some examples, the other end of the second barrier groove 4122 may extend to the inner edge of the yoke 413.

[0139] For example, multiple second blocking grooves 4122 can be staggered with multiple first blocking grooves 4121 along the circumference of the core 41. That is, a second blocking groove 4122 can be provided between any two adjacent first blocking grooves 4121, and a first blocking groove 4121 can be provided between any two adjacent second blocking grooves 4122. The first blocking groove 4121 penetrates the outer edge of the toothed portion 414 and extends to the inner edge of the toothed portion 414. The second blocking groove 4122 can penetrate the inner edge of the yoke portion 413, but does not penetrate the outer edge of the toothed portion 414.

[0140] In this way, the eddy current loss of the iron core 41 can be reduced, and the integrity of the yoke 413 can be guaranteed to improve the structural strength of the yoke 413, thereby further guaranteeing the structural strength of the iron core 41.

[0141] It should be noted that the number N of the aforementioned blocking grooves 412 is the sum of the number of the first blocking grooves 4121 and the second blocking grooves 4122; the orthographic projection area of ​​the blocking groove 412 on the first projection plane (i.e., the first area A) is the sum of the orthographic projection areas of the first blocking groove 4121 and the second blocking groove 4122 on the first projection plane; the width W of the blocking groove 412 along the circumference of the iron core 41 is the width of the first blocking groove 4121 along the circumference of the iron core 41 or the width of the second blocking groove 4122 along the circumference of the iron core 41. The circumferential widths of the first blocking groove 4121 and the second blocking groove 4122 can be the same or different, and this disclosure does not limit this; the length of the first blocking groove 4121 (i.e., the dimension of the first blocking groove 4121 along the radial direction of the iron core 41) and the length of the second blocking groove 4122 (i.e., the dimension of the second blocking groove 4122 along the radial direction of the iron core 41) can be the same or different, and this disclosure does not limit this.

[0142] In some embodiments, the second blocking groove 4122 and the first blocking groove 4121 partially overlap in the circumferential direction of the iron core 41. It should be noted that the partial overlap of the second blocking groove 4122 and the first blocking groove 4121 in the circumferential direction of the iron core 41 means that portions of the first blocking groove 4121 and the second blocking groove 4122 overlap on the same circumference. For example, as shown in FIG19, the overlap of the first blocking groove 4121 and the second blocking groove 4122 in the circumferential direction of the iron core 41 is O.

[0143] Since the second blocking groove 4122 and the first blocking groove 4121 partially overlap in the circumferential direction of the iron core 41, the overlapping blocking grooves can cut off the eddy current path, making it difficult for the eddy current to form a complete loop inside the iron core 41. This effectively reduces eddy current loss, improves the efficiency and stability of the equipment, and reduces problems such as deformation and aging of the iron core 41 caused by overheating.

[0144] Motor thrust refers to the thrust generated by motor 10 during operation, that is, the force generated in the process of converting electrical energy into mechanical energy. Figures 25, 26, and 27 respectively use L=24mm, N=72, R1=57mm, R2=27mm, W=0.5mm, the radial dimension (radius) of the boot part is 2.5mm, the radial dimension (radius) of the tooth part is 24mm, the radial dimension (radius) of the yoke part is 6mm, and the yoke part thickness is 6mm as test samples.

[0145] As shown in Figures 24, 25, and 27, as the operating speed of the motor 10 increases, the iron core 41 with the obstruction slot 412 can increase the thrust of the motor 10, thereby improving the working performance of the motor 10. For example, when the operating speed of the motor 10 is 1 mm / s, the thrust of the motor 10 with the iron core 41 without the obstruction slot 412 is close to 3800 N, while the thrust of the motor 10 with the iron core 41 with the obstruction slot 412 is close to 5000 N. When the operating speed of the motor 10 is 2 mm / s, the thrust of the motor 10 with the iron core 41 without the obstruction slot 412 is close to 2200 N, while the thrust of the motor 10 with the iron core 41 with the obstruction slot 412 is close to 4000 N. The thrust of the motor 10 with the iron core 41 with the obstruction slot 412 is significantly greater than that with the iron core 41 without the obstruction slot 412. As shown in Figure 26, the highest efficiency of the motor 10 with the iron core 41 without the obstruction slot 412 is close to 60%, while the highest efficiency of the motor 10 with the iron core 41 with the obstruction slot 412 is close to 75%. The highest efficiency of the motor 10 with the iron core 41 with the obstruction slot 412 is 15% higher than that of the motor 10 with the iron core 41 without the obstruction slot 412. Therefore, it can be shown that the iron core 41 provided in some embodiments of this disclosure can simultaneously achieve the effects of low eddy current loss and high thrust.

[0146] Please refer to Figures 28 and 29. In some embodiments, the tooth 414 is provided with a plurality of circumferentially spaced blocking slits 415, which can penetrate the tooth 414 along the axial direction of the iron core 41.

[0147] For example, the plurality of blocking slots 415 can be respectively provided in the tooth center 4141, and the plurality of blocking slots 415 can extend circumferentially along the tooth center 4141. In order to prevent the blocking slots 415 from dividing the iron core into two unconnected parts, the plurality of blocking slots 415 can be provided at intervals.

[0148] For example, the plurality of barrier seams 415 can also be straight seams and are set approximately perpendicular to the barrier groove 412. This approximately perpendicularity can mean that the angle between the barrier seam 415 and the barrier groove 412 is greater than or equal to 70 degrees and less than or equal to 110 degrees.

[0149] Thus, by providing multiple circumferentially spaced obstruction slots 415 on the tooth portion 414, the eddy current loop resistance can be increased. Since the magnitude of the eddy current is inversely proportional to the loop resistance, when the loop resistance increases, the current flow is hindered, and the eddy current decreases. This reduces eddy current losses and improves the efficiency of the motor 10.

[0150] Figure 30(1) is a schematic diagram of an iron core without a barrier slot 415. Figure 30(2) is a schematic diagram of an iron core with a barrier slot and barrier groove forming a "T" shape. Figure 30(3) is a schematic diagram of an iron core with a barrier slot and barrier groove forming an "H" shape. Figure 30(4) is a schematic diagram of an iron core when the barrier slot and barrier groove intersect perpendicularly.

[0151] In some embodiments, the barrier slit 415 is disposed between two adjacent barrier grooves 412.

[0152] In some examples, the barrier slit 415 may communicate with one of two adjacent barrier grooves 412. For example, referring to Figures 28, 29, and 30 (2), the barrier slit 415 and the barrier groove 412 are arranged in a "T" shape. For example, the barrier slit 415 is disposed between two adjacent barrier grooves 412, and the barrier slit 415 communicates with one of the two adjacent barrier grooves 412. The barrier slit 415 may include an adjacent first barrier slit 4151 and a second barrier slit 4152, and the barrier groove 412 includes an adjacent first barrier groove 4121 and a second barrier groove 4122, which can be referred to the above description, and will not be repeated here. The first barrier slit 4151 communicates with the first barrier groove 4121, and the second barrier slit 4152 communicates with the second barrier groove 4122. Thus, by connecting the barrier slot 415 and the barrier groove 412, the eddy current path can be cut off more effectively, making it difficult for the eddy current to form a complete loop inside the iron core 41, thereby significantly reducing eddy current loss.

[0153] In other examples, the barrier slit 415 may not be connected to the two adjacent barrier grooves 412. For example, see Figure 30 (3), where the barrier slit 415 and the barrier groove 412 are arranged in an "H" shape. It should be noted that the "H" shape arrangement is only listed for the convenience of understanding the shape of the barrier slit 415 and the barrier groove 412, and does not constitute a limitation of this disclosure.

[0154] Thus, the design that the barrier slit 415 is not connected to the two adjacent barrier grooves 412 allows the barrier slit 415 and barrier grooves 412 to be processed and adjusted separately during the production of the iron core 41, making it easier to meet the precision requirements and reducing the manufacturing difficulty.

[0155] In other embodiments, the tooth 4141 is provided with a plurality of circumferentially spaced blocking slots 415, each blocking slot 415 connecting to a blocking groove 412 and located between two adjacent blocking grooves 412. Since each blocking slot 415 connects to a blocking groove 412 and is located between two adjacent blocking grooves 412, this structure can more effectively block the eddy current path of the tooth 414. When the eddy current encounters the blocking slots 415 and the blocking grooves 412, it is difficult to form a complete loop, thereby greatly reducing eddy current losses and reducing the heat generated by the eddy currents.

[0156] For example, the barrier slit 415 is perpendicularly intersecting the barrier groove 412. The barrier slit 415 intersects the barrier groove 412, and a portion of the barrier slit 415 is located on one side of the barrier groove 412, while the other portion is located on the other side of the barrier groove 412. For example, please refer to Figure 30 (4). For the barrier groove 412 and the barrier grooves 412A and 412B adjacent to the barrier groove 412, the barrier slit 415 communicates with the barrier groove 412, and a portion of the barrier slit 415 is located between the barrier groove 412 and the barrier groove 412A, while the other portion of the barrier slit 415 is located between the barrier groove 412 and the barrier groove 412B.

[0157] Referring to Figures 31, 32, 33, 34, and 35, it can be seen that the eddy current loss of the core 41 is highest when no obstruction slot is provided, reaching 7514W. Furthermore, the eddy current loss is mainly concentrated at the connection between the tooth 414 and the yoke 413, and at the end of the obstruction groove 412 on the tooth 414. When the obstruction slot 415 and the obstruction groove 412 of the core 41 form an "H" shape, the eddy current loss of the core 41 is significantly reduced compared to when no obstruction slot 415 is provided, reaching 7040W. When the obstruction slot 415 and the obstruction groove 412 of the core 41 are arranged perpendicularly, the eddy current loss of the core 41 is also significantly reduced compared to when no obstruction slot 415 is provided, reaching 7022W. When the barrier slot 415 and barrier groove 412 of the iron core 41 form a "T" shape, the eddy current loss of the iron core 41 is significantly reduced compared to when the barrier slot 415 is not provided, and the eddy current loss of the iron core 41 reaches 7005W. In summary, the eddy current loss of the iron core 41 is lowest when the barrier slot 415 and barrier groove 412 of the iron core 41 form a "T" shape.

[0158] Referring to Figures 36 and 37, it can be seen that without the obstruction slot 415, eddy current losses are mainly concentrated at the connection between the tooth 414 and the yoke 413, and at the end of the obstruction groove 412 on the tooth 414. However, with the obstruction slot 415, the eddy current losses at the connection between the tooth 414 and the yoke 413, and at the end of the obstruction groove 412 on the tooth 414, are significantly reduced. Referring further to Figure 38, the eddy current loss without the obstruction slot 415 is approximately 7514 W, while the eddy current loss with the obstruction slot 415 is approximately 7005 W. Compared to the core without the obstruction slot 415, the eddy current loss of the core 41 with the obstruction slot 415 is further reduced by 6.7%.

[0159] Thus, in the following embodiment of the present disclosure, by providing a plurality of circumferentially spaced blocking slots 415 on the tooth 414, and the blocking slots 415 being connected to one of the two adjacent blocking slots 412, the resistance of the eddy current loop can be increased, thereby reducing eddy current losses and improving the efficiency of the motor 10.

[0160] In understanding the scope of this disclosure, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of at least one of the described features, elements, components, groups, integrals, and steps, but do not exclude the presence of at least one of other undescribed features, elements, components, groups, integrals, and steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0161] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0162] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this disclosure. Features described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0163] This disclosure has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this disclosure to the described embodiments. Furthermore, those skilled in the art will understand that this disclosure is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this disclosure, all of which fall within the scope of protection claimed by this disclosure.

Claims

1. An iron core (41) having a plurality of blocking grooves (412) spaced apart along the circumference of the iron core (41), wherein the number N of the plurality of blocking grooves (412) satisfies: 20≤N≤90.

2. The iron core (41) according to claim 1, wherein, The number N of the plurality of barrier grooves (412) satisfies: 60≤N≤80.

3. The iron core (41) according to claim 1 or 2, wherein, The sum of the orthographic projection areas of the plurality of barrier grooves (412) on the first projection plane is the first area A, and the orthographic projection area of ​​the iron core (41) on the first projection plane is the second area B. The first area A and the second area B satisfy: A≤0.22×(A+B). The first projection plane is a plane perpendicular to the central axis of the iron core (41).

4. The iron core (41) according to any one of claims 1 to 3, wherein, The width W of any of the plurality of blocking grooves (412) along the circumferential direction of the iron core (41) satisfies: 0.3mm≤W≤1mm.

5. The iron core (41) according to any one of claims 1 to 4, wherein, The core (41) includes interconnected teeth (414) and yoke (413), the teeth (414) being located on the outer periphery of the yoke (413); the plurality of blocking grooves (412) includes at least one first blocking groove (4121), the first blocking groove (4121) extending along the inner edge of the teeth (414) toward the outer edge of the teeth (414).

6. The iron core (41) according to claim 5, wherein, The first barrier groove (4121) extends radially along the tooth (414).

7. The iron core (41) according to claim 5 or 6, wherein, The first blocking groove (4121) is provided on the tooth (414), and one end of the first blocking groove (4121) penetrates the outer edge of the tooth (414), while the other end of the first blocking groove (4121) does not penetrate the outer edge of the yoke (413).

8. The iron core (41) according to claim 7, wherein, The tooth (414) includes a tooth center (4141) and a boot (4142), the boot (4142) being located on the outer periphery of the tooth center (4141), one end of the first blocking groove (4121) penetrating through the outer edge of the boot (4142), and the other end of the first blocking groove (4121) penetrating to the inner edge of the tooth center (4141).

9. The iron core (41) according to any one of claims 5 to 8, wherein, The plurality of blocking grooves (412) further includes at least one second blocking groove (4122), the second blocking groove (4122) being spaced apart from the first blocking groove (4121); one end of the second blocking groove (4122) penetrates the inner edge of the yoke (413), and the other end of the second blocking groove (4122) does not penetrate the outer edge of the tooth (414).

10. The iron core (41) according to claim 9, wherein, The at least one first blocking groove (4121) includes a plurality of first blocking grooves (4121), and the at least one second blocking groove (4122) includes a plurality of second blocking grooves (4122). The plurality of second blocking grooves (4122) and the plurality of first blocking grooves (4121) are arranged alternately along the circumference of the iron core (41).

11. The iron core (41) according to claim 9 or 10, wherein, The second barrier groove (4122) and the first barrier groove (4121) partially overlap in the circumferential direction of the iron core (41).

12. The iron core (41) according to claim 8, wherein, The tooth (4141) is provided with a plurality of barrier slots (415) distributed circumferentially along the iron core (41).

13. The iron core (41) according to claim 12, wherein, Any one of the plurality of barrier seams (415) satisfies one of the following: The barrier slit extends circumferentially along the tooth (4141); and The barrier seam (415) is a straight seam and is approximately perpendicular to the corresponding barrier groove (412).

14. The iron core (41) according to claim 12 or 13, wherein, Any one of the plurality of barrier seams (415) is disposed between two adjacent barrier grooves (412) among the plurality of barrier grooves (412); the barrier seam (415) satisfies one of the following: The barrier seam (415) is connected to one of the two adjacent barrier grooves (412); and The barrier seam (415) is not connected to the two adjacent barrier grooves (412).

15. The iron core (41) according to claim 12 or 13, wherein, Any one of the plurality of barrier seams (415) is connected to one of the plurality of barrier grooves (412) and is located between two other adjacent barrier grooves (412).

16. The iron core (41) according to claim 12 or 13, wherein, Any one of the plurality of barrier seams (415) is disposed between two adjacent barrier grooves (412) of the plurality of barrier grooves (412). The barrier seam (415) is connected to one of the two adjacent barrier grooves (412). The plurality of barrier seams (415) includes an adjacent first barrier seam (4151) and a second barrier seam (4152). The plurality of barrier grooves (412) includes an adjacent first barrier groove (4121) and a second barrier groove (4122). The first barrier seam (4151) is connected to the first barrier groove (4121), and the second barrier seam (4152) is connected to the second barrier groove (4122).

17. A primary component (4), comprising: According to any one of the plurality of iron cores (41) in claims 1 to 16, the plurality of iron cores (41) are arranged axially along the iron core (41), and a receiving groove (43) is formed between two adjacent iron cores (41); and A coil (42), at least a portion of which is housed within the receiving groove (43).

18. A linear motor (10), comprising: The primary component (4) according to claim 17; as well as The secondary component (2) is sleeved on the outer periphery of the primary component (4), and the secondary component (2) and the primary component (4) reciprocate relative to each other along the axial direction of the iron core (41).

19. A suspension structure (300), comprising: The linear motor (10) according to claim 18; Fork arm (20), said fork arm (20) being connected to said secondary component (2); and Top cover (30), which is connected to the primary component (4).

20. The suspension structure (300) according to claim 19, further comprising: A support member (11) is disposed on the secondary component (2); as well as An elastic element (40) is disposed between the support member (11) and the top cover (30).

21. A vehicle (1000), comprising one of the following: The iron core (41) according to any one of claims 1 to 16; The primary component (4) according to claim 17; The linear motor (10) according to claim 18; and The suspension structure (300) according to claim 19 or 20.

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