Levitation electric motor, suspension system and vehicle

Abstract

A levitation electric motor, a suspension system and a vehicle. The levitation electric motor comprises a mover and a stator. The stator is coupled to the mover, so that the mover can perform a reciprocating motion. The stator comprises a stator core, stator windings and accommodating slots, the stator core comprising a stator yoke portion and a plurality of stator tooth portions. The plurality of stator tooth portions are arranged at intervals in the axial direction of the stator core. One accommodating slot for accommodating one stator winding is formed between two adjacent stator tooth portions among the plurality of stator tooth portions. The width of the stator yoke portion in the radial direction of the stator is W1, and the width of each stator tooth portion in the axial direction of the stator is L1, where W1 / L1=0.55-0.9.

Description

Suspension motor, suspension system and vehicle

[0001] This application claims priority to Chinese Patent Application No. 202410518986.5, filed on April 28, 2024, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of vehicles, and in particular to a suspension motor, a suspension system and a vehicle. BACKGROUND

[0003] Electric motors, especially cylindrical electric motors, are widely used in the suspension systems of vehicles due to their high winding utilization rate and high thrust density. SUMMARY

[0004] The present disclosure aims to at least solve one of the technical problems in the related art. To this end, a first object of the present disclosure is to provide a suspension motor with large thrust and small fluctuation to ensure the working performance of the suspension motor, solving the technical problem of small thrust and easy fluctuation of the suspension motor in the related art.

[0005] A second object of the present disclosure is to provide a suspension system having the above-mentioned suspension motor.

[0006] A third object of the present disclosure is to provide a vehicle having the above-mentioned suspension system.

[0007] The suspension motor according to some embodiments of the present disclosure includes a mover and a stator. The stator and the mover are coupled to each other so that the mover can reciprocate. The stator includes a stator core, a stator winding and a receiving slot. The stator core includes a stator yoke and a plurality of stator teeth. The plurality of stator teeth are arranged at intervals along the axial direction of the stator core. The receiving slot for receiving the stator winding is formed between any two adjacent stator teeth of the plurality of stator teeth. The width of the stator yoke in the radial direction of the stator is W1, the width of any one of the plurality of stator teeth in the axial direction of the stator is L1, and W1 / L1 = 0.55-0.9.

[0008] According to some embodiments of the present disclosure, the ratio of the width of the stator yoke in the radial direction of the stator to the width of the stator tooth in the axial direction of the stator is limited, so that the width of the stator yoke in the radial direction of the stator and the width of the stator tooth in the axial direction of the stator are within a suitable range, thereby ensuring the magnetic conduction effect of the stator yoke and the stator tooth and to some extent avoiding the stator yoke and the stator tooth from pressing the magnetic force lines, so that the electromagnetic thrust of the levitation motor can approach or reach the maximum value and the thrust fluctuation can approach or reach the minimum value. In this way, the electromagnetic thrust of the levitation motor can be increased, the thrust fluctuation can be reduced, and to some extent, the vibration, noise and resonance of the levitation motor during operation can be avoided, thereby ensuring the working performance of the levitation motor.

[0009] In some embodiments, W1 / L1 = 0.7.

[0010] In some embodiments, the mover is provided with a plurality of permanent magnets matched with the stator winding, and the plurality of permanent magnets are sequentially arranged along the moving direction of the mover.

[0011] In some embodiments, the plurality of permanent magnets include radially magnetized magnetic steel and axially magnetized magnetic steel, and the radially magnetized magnetic steel and the axially magnetized magnetic steel are arranged in a Halbach array in the moving direction of the mover.

[0012] In some embodiments, in the moving direction of the mover, the height of the radially magnetized magnetic steel is H1, the height of the axially magnetized magnetic steel is H2, and H1 / (H1+H2) = 0.65-0.85.

[0013] In some embodiments, the plurality of stator teeth form one or more accommodation grooves, and under the maximum coupling length of the stator and the mover, the number of grooves of the plurality of accommodation grooves is Z, the number of poles of the plurality of permanent magnets is P, and the Z and the P satisfy the following condition: 3 / 4≤Z / P≤3 / 2.

[0014] In some embodiments, the Z and the P satisfy the following condition: 3 / 4≤Z / P<1.

[0015] In some embodiments, the Z and the P satisfy the following condition: 6 / 7≤Z / P≤6 / 5.

[0016] According to some embodiments of the present disclosure, the suspension system includes the aforementioned levitation motor, one of the mover and the stator is connected with the wheel end, and the other is connected with the vehicle body end.

[0017] According to some embodiments of the present disclosure, the suspension system adopts the aforementioned levitation motor to improve the working performance of the suspension system.

[0018] In some embodiments, the suspension system comprises a plurality of wheel ends, each of the plurality of wheel ends is provided with the levitation motor.

[0019] A vehicle according to some embodiments of the present disclosure comprises the aforementioned suspension system.

[0020] A vehicle according to some embodiments of the present disclosure employs the aforementioned suspension system to ensure the comfort of the vehicle, thereby improving the driving experience.

[0021] Additional aspects and advantages of the present disclosure will become apparent from the following description, or will be learned by practice of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0022] The aspects and advantages of the foregoing and additional aspects and advantages of at least one of the aspects and advantages of the present disclosure will become apparent from the following description, or will be learned by practice of the present disclosure.

[0023] Fig. 1 is a schematic view of a levitation motor according to some embodiments of the present disclosure.

[0024] Fig. 2 is a schematic view of a plurality of split cores cooperating with a plurality of permanent magnets according to some embodiments of the present disclosure.

[0025] Fig. 3 is an enlarged view of region I in Fig. 2.

[0026] Fig. 4 is a schematic view of a stator cooperating with a plurality of permanent magnets according to some embodiments of the present disclosure.

[0027] Fig. 5 is an enlarged view of region II in Fig. 4.

[0028] Fig. 6 is an enlarged view of region III in Fig. 4.

[0029] Fig. 7 is a schematic view of a plurality of split cores cooperating with a plurality of permanent magnets according to some other embodiments of the present disclosure.

[0030] Fig. 8 is an enlarged view of region IV in Fig. 7.

[0031] 1000, a suspension motor; 100, a stator; 110, a stator core; 111, a split core; 1114, a stator yoke portion; 1115, a stator tooth portion; 1111, a first cut surface; 1112, a second cut surface; 1113, a middle connecting surface; 1116, a main body portion; 1117, a protruding portion; 1118, an end portion lamination; 1119, a middle lamination; 112, a containing groove; 120, a stator winding; 121, an insulation framework; 122, an insulation piece; 200, a mover; 210, a permanent magnet; 211, a radial magnetization magnetic steel; 2111, a first radial magnetization magnetic steel; 2112, a second radial magnetization magnetic steel; 212, an axial magnetization magnetic steel; 2121, a first axial magnetization magnetic steel; 2122, a second axial magnetization magnetic steel; 220, a connecting arm; 300, a support seat; 400, a protective sleeve; 500, a lower tray; 600, a damping spring. DETAILED DESCRIPTION

[0032] Embodiments of the present disclosure are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only for the purpose of explaining the present disclosure, and should not be understood as limiting the present disclosure.

[0033] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0034] In the related art, the thrust of the motor is small and the thrust is prone to fluctuation, which affects the working performance of the motor.

[0035] To this end, some embodiments of the present disclosure provide a suspension motor 1000. The suspension motor 1000 of some embodiments of the present disclosure is described below with reference to the drawings of the specification.

[0036] In combination with FIGS. 1 and 2, the suspension motor 1000 according to some embodiments of the present disclosure includes a mover 200 and a stator 100.

[0037] The stator 100 and the mover 200 are coupled to each other so that the mover 200 can reciprocate. As shown in FIGS. 2 and 3, the stator 100 includes a stator core 110, a stator winding 120, and a receiving slot 112. The stator core 110 includes a stator yoke 1114 and a plurality of stator teeth 1115. The plurality of stator teeth 1115 are arranged at intervals along an axial direction of the stator core 110. The receiving slot 112, in which the stator winding 120 is received, is formed between adjacent two stator teeth 1115 (the structure of the stator winding 120 can be seen from FIG. 5).

[0038] It should be noted that the coupling between the stator 100 and the mover 200 means that the stator 100 and the mover 200 can affect each other through interaction, so as to facilitate the control of the reciprocating movement of the mover 200, reduce the control difficulty of the mover 200, and ensure the working performance of the levitation motor 1000. The moving direction of the mover 200 can be understood as the up-down direction shown in FIG. 2. By arranging the stator 100 to include the stator core 110 and arranging the plurality of stator teeth 1115 of the stator core 110 at intervals along the axial direction of the stator core 110, the plurality of stator teeth 1115 can be arranged at intervals along the moving direction of the mover 200. In this way, the stator 100 and the mover 200 can be coupled to each other at all times during the movement of the mover 200, thereby ensuring the working performance of the levitation motor 1000.

[0039] In the description of some embodiments of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0040] It should be noted that the stator yoke 1114 is mainly formed as a passage for connecting the magnetic flux of the stator teeth 1115, so as to form magnetic lines of force around the stator winding 120, thereby enabling the stator 100 and the mover 200 to be coupled to each other, so as to ensure the working performance of the levitation motor 1000.

[0041] As shown in FIG. 3, the width of the stator yoke 1114 in the radial direction of the stator 100 is W1, and the width of the stator tooth 1115 in the axial direction of the stator 100 is L1. W1 / L1 = 0.55-0.9.

[0042] It is worth noting that when W1 / L1 < 0.55, there are cases where the width of the stator yoke 1114 in the radial direction of the stator 100 is too narrow or the width of the stator tooth 1115 in the axial direction of the stator 100 is too wide. When the width of the stator yoke 1114 in the radial direction of the stator 100 is too narrow, the magnetic conductivity of the stator yoke 1114 will be affected, thereby affecting the thrust size, and the magnetic lines of force will also be excessively squeezed and suddenly changed when passing through the stator yoke 1114, causing the thrust to fluctuate. When the width of the stator tooth 1115 in the axial direction of the stator 100 is too wide, the path of the magnetic lines of force will be lengthened, thereby affecting the thrust size.

[0043] In addition, when W1 / L1>0.9, there is a case that the width of the stator yoke portion 1114 in the radial direction of the stator 100 is too wide or the width of the stator tooth portion 1115 in the axial direction of the stator 100 is too narrow. When the width of the stator yoke portion 1114 in the radial direction of the stator 100 is too wide, the path of the magnetic force line is too long, and the thrust is reduced. When the width of the stator tooth portion 1115 in the axial direction of the stator 100 is too narrow, the magnetic force line is easily mutated due to extrusion when passing through the stator tooth portion 1115, and the thrust fluctuation is caused.

[0044] Therefore, in some embodiments of the present disclosure, the ratio of the width W1 of the stator yoke portion 1114 in the radial direction of the stator 100 to the width L1 of the stator tooth portion 1115 in the axial direction of the stator 100 is set to 0.55-0.9, so that the width W1 of the stator yoke portion 1114 in the radial direction of the stator 100 and the width L1 of the stator tooth portion 1115 in the axial direction of the stator 100 can be within a suitable range, and thus the electromagnetic thrust of the levitation motor 1000 approaches or reaches the maximum value and the thrust fluctuation approaches or reaches the minimum value. In this way, while increasing the electromagnetic thrust of the levitation motor 1000, the thrust fluctuation can also be reduced, so as to avoid, to some extent, the generation of vibration, noise, resonance and the like of the levitation motor 1000 during operation, thereby ensuring the working performance of the levitation motor 1000.

[0045] As can be seen from the above structure, the levitation motor 1000 of some embodiments of the present disclosure can increase the electromagnetic thrust of the levitation motor 1000 and reduce the thrust fluctuation by creatively setting the ratio of the width W1 of the stator yoke portion 1114 in the radial direction of the stator 100 to the width L1 of the stator tooth portion 1115 in the axial direction of the stator 100. In this way, to some extent, the generation of vibration, noise, resonance and the like of the levitation motor 1000 during operation can be avoided, thereby ensuring the working performance of the levitation motor 1000.

[0046] It can be understood that, compared with the related art, in some embodiments of the present disclosure, without changing the structure of the levitation motor 1000, only by adjusting the size ratio of the width W1 of the stator yoke portion 1114 in the radial direction of the stator 100 to the width L1 of the stator tooth portion 1115 in the axial direction of the stator 100, the electromagnetic thrust of the levitation motor 1000 can be increased, the thrust fluctuation can be reduced, and the working performance of the levitation motor 1000 can be ensured.

[0047] In some embodiments, W1 / L1=0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85 or 0.9, etc.

[0048] In some embodiments, W1 / L1=0.7.

[0049] It should be noted that when W1 / L1 is too small, there are cases where the width of the stator yoke portion 1114 in the radial direction of the stator 100 is too narrow or the width of the stator tooth portion 1115 in the axial direction of the stator 100 is too wide. When the width of the stator yoke portion 1114 in the radial direction of the stator 100 is too narrow, the magnetic conductivity of the stator yoke portion 1114 is affected, and thus the thrust size is affected, and the magnetic lines are also excessively squeezed when passing through the stator yoke portion 1114, causing the thrust to fluctuate. When the width of the stator tooth portion 1115 in the axial direction of the stator 100 is too wide, the path of the magnetic lines becomes longer, and thus the thrust size is affected.

[0050] When W1 / L1 is too large, there are cases where the width of the stator yoke portion 1114 in the radial direction of the stator 100 is too wide or the width of the stator tooth portion 1115 in the axial direction of the stator 100 is too narrow. When the width of the stator yoke portion 1114 in the radial direction of the stator 100 is too wide, the path of the magnetic lines becomes longer, and thus the thrust decreases. When the width of the stator tooth portion 1115 in the axial direction of the stator 100 is too narrow, the magnetic lines are easily squeezed when passing through the stator tooth portion 1115, causing the thrust to fluctuate.

[0051] Therefore, in some embodiments of the present disclosure, the levitation motor 1000 is set to W1 / L1 = 0.7 to optimize the width W1 of the stator yoke portion 1114 in the radial direction of the stator 100 and the width L1 of the stator tooth portion 1115 in the axial direction of the stator 100, so that the electromagnetic thrust of the levitation motor 1000 approaches or reaches the maximum value and the thrust fluctuation approaches or reaches the minimum value. In this way, to some extent, the vibration, noise, resonance, and the like of the levitation motor 1000 during operation can be avoided, and the working performance of the levitation motor 1000 is ensured.

[0052] It should be noted that when the ratio of the width W1 of the stator yoke portion 1114 in the radial direction of the stator 100 to the width L1 of the stator tooth portion 1115 in the axial direction of the stator 100 is greater than or equal to 0.5, the influence of the ratio on the electromagnetic thrust and the thrust fluctuation is relatively small. Therefore, when the width of the stator yoke portion 1114 in the radial direction of the stator 100 needs to be thickened due to mechanical strength considerations, the ratio range described above can not be restricted.

[0053] In some embodiments, as shown in FIGS. 2 and 3, the stator core 110 includes a plurality of split cores 111. The plurality of split cores 111 are sequentially stacked along the axial direction of the stator core 110. The split core 111 includes a stator yoke portion 1114 and a stator tooth portion 1115 connected to each other. Two adjacent stator yoke portions 1114 are stacked, and a receiving slot 112 for accommodating the stator winding 120 is formed between two adjacent stator tooth portions 1115.

[0054] By setting the stator 100 to include a plurality of split cores 111 and setting the plurality of split cores 111 to be sequentially stacked along the axial direction of the stator core 110, the stator 100 and the mover 200 can be coupled to each other at all times during movement of the mover 200, thereby ensuring the working performance of the levitation motor 1000.

[0055] In addition, the stator yoke portion 1114 and the stator tooth portion 1115 described above can be understood as being connected in the radial direction of the split core 111. The stacked arrangement can be understood as the stator yoke portion 1114 of the plurality of split cores 111 being stacked in the axial direction of the stator 100, so as to form the accommodation groove 112 in the axial direction of the stator 100, thereby reducing the difficulty of forming the accommodation groove 112, and thus reducing the difficulty of installing the stator winding 120.

[0056] In some embodiments, as shown in FIGS. 4 and 5, the stator 100 further includes an insulating framework 121. The insulating framework 121 is arranged on the groove wall of the accommodation groove 112, and the insulating framework 121 is located between the split core 111 and the stator winding 120. The insulating framework 121 is configured to insulate the split core 111 and the stator winding 120, thereby avoiding contact between the split core 111 and the stator winding 120 to some extent, so as to ensure the working performance of the stator winding 120.

[0057] In some embodiments, the stator winding 120 is a disc winding. In this way, there is no end winding, and the utilization rate of the winding can be improved.

[0058] In some embodiments, as shown in FIGS. 4 and 5, a double-layer disc winding is arranged in the accommodation groove 112, and the double-layer disc windings are insulated from each other by the insulating member 122, so as to ensure the working performance of the stator winding 120.

[0059] For example, the disc winding is first wound and formed, and then nested in the accommodation groove 112 of the stator 100, so as to arrange the stator winding 120 on the stator 100, thereby ensuring the working performance of the stator 100.

[0060] In some embodiments, as shown in FIG. 3, the width of the stator tooth 1115 in the axial direction of the stator 100 is L1, and the width of the accommodating slot 112 in the axial direction of the stator 100 is L2, and L1 / (L1+L2) = 0.38-0.48. The width of the stator tooth 1115 in the axial direction of the stator 100 and the width of the accommodating slot 112 in the axial direction of the stator 100 can be understood as the width of the stator tooth 1115 and the accommodating slot 112 in the same axial line. For example, the width L1 of the stator tooth 1115 and the width L2 of the accommodating slot 112 are both the width corresponding to the main body part 1116 of the stator tooth 1115. And the above-mentioned L1 / (L1+L2) can also be understood as the ratio of the width of the stator tooth 1115 in the axial direction of the stator 100 to the distance between the same axial end faces of the two adjacent stator teeth 1115 in the axial direction of the stator 100, which is 0.38-0.48.

[0061] At this time, the electromagnetic thrust of the levitation motor 1000 can be close to or reach the maximum value, and the thrust fluctuation can be close to or reach the minimum value, so that the electromagnetic thrust of the levitation motor 1000 can be increased while the thrust fluctuation can be reduced. In this way, to some extent, the vibration, noise, resonance and the like of the levitation motor 1000 during operation can be avoided, so as to ensure the working performance of the levitation motor 1000.

[0062] In some embodiments, L1 / (L1+L2) = 0.38, 0.4, 0.42, 0.45 or 0.48, etc.

[0063] For example, L1 / (L1+L2) = 0.42.

[0064] In some embodiments, as shown in FIG. 3, the stator tooth 1115 includes a main body part 1116 and a protruding part 1117. The main body part 1116 is connected to the stator yoke part 1114, and the protruding part 1117 is arranged at one end of the main body part 1116 away from the stator yoke part 1114, and the protruding part 1117 protrudes towards the accommodating slot 112. In this way, part of the structure of the protruding part 1117 can be arranged at the opening of the accommodating slot 112 to adjust the width of the slot opening of the accommodating slot 112 in the axial direction of the stator 100, optimize the cogging force, and reduce the thrust fluctuation of the levitation motor 1000. In this way, to some extent, the vibration, noise, resonance and the like of the levitation motor 1000 during operation can be avoided, so as to ensure the working performance of the levitation motor 1000.

[0065] In some embodiments, the ratio of the width W2 of the protrusion 1117 in the radial direction of the stator 100 to the minimum distance L3 between the two adjacent protrusions 1117 is in the range of 0.125-0.5. That is, W2 / L3 = 0.125-0.5. In this case, the electromagnetic thrust of the levitation motor 1000 can be close to or reach the maximum value, and the thrust fluctuation can be close to or reach the minimum value, so that the electromagnetic thrust of the levitation motor 1000 can be increased while the thrust fluctuation is reduced. In this way, vibration, noise, resonance, etc. of the levitation motor 1000 during operation can be avoided, thereby ensuring the working performance of the levitation motor 1000.

[0066] In some embodiments, W2 / L3 = 0.125, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5, etc.

[0067] For example, W2 / L3 = 0.25.

[0068] In some embodiments, the ratio of the minimum distance L3 between the two adjacent protrusions 1117 to the width L2 of the accommodating groove 112 in the axial direction of the stator 100 is in the range of 0.6-1. That is, L3 / L2 = 0.6-1. In this case, the electromagnetic thrust of the levitation motor 1000 can be close to or reach the maximum value, and the thrust fluctuation can be close to or reach the minimum value, so that the electromagnetic thrust of the levitation motor 1000 can be increased while the thrust fluctuation is reduced. In this way, vibration, noise, resonance, etc. of the levitation motor 1000 during operation can be avoided, thereby ensuring the working performance of the levitation motor 1000.

[0069] In some embodiments, L3 / L2 = 0.6, 0.69, 0.7, 0.8, 0.9, or 1, etc.

[0070] For example, L3 / L2 = 0.69.

[0071] In some embodiments, as shown in FIGS. 2 and 3, the circumferential wall of the at least one split core 111 opposite to the mover 200 includes a first cut surface 1111 and a second cut surface 1112. The first cut surface 1111 and the second cut surface 1112 are arranged in the axial direction of the stator 100, and in the direction away from the axial center of the split core 111, the distance between the first cut surface 1111 and the mover 200 and the distance between the second cut surface 1112 and the mover 200 both increase from inside to outside. That is, the circumferential wall of the at least one split core 111 opposite to the mover 200 includes the first cut surface 1111 and the second cut surface 1112 among the plurality of split cores 111.

[0072] It should be noted that the axial direction of the split core 111 refers to the up-down direction shown in FIG. 2. The direction away from the axial center of the split core 111 can be understood as the direction from the axial center of the split core 111 to the axial upper end of the split core 111 and the direction from the axial center of the split core 111 to the axial lower end of the split core 111, and the axial center of the split core 111 is located between the axial lower end of the split core 111 and the axial upper end of the split core 111. From inside to outside refers to from the axial center of the split core 111 to the axial end of the split core 111 (such as the axial lower end and the axial upper end of the split core 111).

[0073] In this way, when the distance between the first cut surface 1111 and the mover 200 and the distance between the second cut surface 1112 and the mover 200 are both set to increase from inside to outside, the distance between the circumferential wall of the split core 111 directly opposite the mover 200 and the mover 200 is changed, so that the gap between the stator 100 and the mover 200 is changed. In this way, the resistance of the split core 111 to the electromagnetic force can be adjusted, and the resistance of the split core 111 to the electromagnetic force is changed, which is beneficial to reduce the sudden change of the magnetic resistance, thereby reducing at least one of the cogging force and the end force, reducing the thrust fluctuation of the levitation motor 1000, and further avoiding the generation of vibration, noise, resonance and the like of the levitation motor 1000 during operation to a certain extent, and ensuring the working performance of the levitation motor 1000.

[0074] Here, "at least one of A, B and C" has the same meaning as "at least one of A, B or C", and includes the following combinations of A, B and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B and C.

[0075] It should be noted that the axial direction of the stator 100 described above can also be understood as the up-down direction shown in FIG. 2. That is, the first cut surface 1111 and the second cut surface 1112 are arranged in the up-down direction of the stator 100, so that the first cut surface 1111 and the second cut surface 1112 can both directly face the mover 200, thereby facilitating the adjustment of the gap between the split core 111 and the mover 200 by the first cut surface 1111 and the second cut surface 1112.

[0076] Meanwhile, when the stator 100 is arranged at the inner periphery of the mover 200 (as shown in FIG. 2), the circumferential wall described above can be understood as the outer circumferential wall of the split core 111; when the stator 100 is arranged at the outer periphery of the mover 200, the circumferential wall described above can be understood as the inner circumferential wall of the split core 111.

[0077] In the description of the present disclosure, the features defined as "first", "second" can explicitly or implicitly include one or more of the features, for the purpose of distinguishing the described features, without order and without difference.

[0078] In some embodiments, as shown in FIGS. 2 and 3, the first cut surface 1111 and the second cut surface 1112 are arranged on the protrusion 1117 to arrange the first cut surface 1111 and the second cut surface 1112 on the circumferential wall of the split core 111 opposite to the mover 200. In this way, the first cut surface 1111 and the second cut surface 1112 can be arranged between the stator 100 and the mover 200 to change the gap between the stator 100 and the mover 200, reduce the thrust fluctuation of the levitation motor 1000, and ensure the working performance of the levitation motor 1000 while reducing the difficulty of forming the first cut surface 1111 and the second cut surface 1112.

[0079] In some embodiments, as shown in FIGS. 2 and 3, the end of the first cut surface 1111 away from the mover 200 and the end of the second cut surface 1112 away from the mover 200 are respectively located on the axial end surface of the split core 111. Here, the first cut surface 1111 and the second cut surface 1112 respectively have an end away from the mover 200 and an end close to the mover 200.

[0080] By arranging the first cut surface 1111 and the second cut surface 1112 in the axial direction of the stator 100 and arranging the ends of the first cut surface 1111 and the second cut surface 1112 away from the mover 200 to be respectively located on the axial end surface of the split core 111, the first cut surface 1111 and the second cut surface 1112 can be formed between the circumferential wall of the split core 111 opposite to the mover 200 and the axial end surface of the split core 111, so as to change the distance between the circumferential wall of the split core 111 and the mover 200 by using the split core 111, so that the distance between the circumferential wall of the split core 111 opposite to the mover 200 and the mover 200 is variable, which is conducive to adjusting the resistance of the split core 111 to the electromagnetic.

[0081] In some embodiments, as shown in FIGS. 2, 4 and 5, the plurality of split cores 111 include end laminations 1118 and a plurality of intermediate laminations 1119. The plurality of intermediate laminations 1119 are arranged between adjacent two end laminations 1118. The plurality of intermediate laminations 1119 are sequentially arranged between the adjacent two end laminations 1118 in the axial direction of the stator 100, and the end laminations 1118 and the plurality of intermediate laminations 1119 are independent of each other, so that the stator 100 as a whole can be assembled, thereby reducing the difficulty of forming the stator 100 and reducing the difficulty of installing the stator winding 120.

[0082] In some embodiments, the end laminations 1118 and the intermediate laminations 1119 are fixedly connected, and the adjacent two intermediate laminations 1119 are fixedly connected, so that the plurality of split cores 111 can be assembled.

[0083] It should be noted that the fixed connection mentioned herein can be a non-detachable connection such as welding or bonding, or a detachable connection such as a bolt connection or a clamping connection, and the present disclosure does not limit this.

[0084] When the first cut surface 1111 and the second cut surface 1112 are arranged on the end lamination 1118, the end force can be reduced by cooperation of the first cut surface 1111 and the second cut surface 1112; when the first cut surface 1111 and the second cut surface 1112 are arranged on the middle lamination 1119, the cogging force can be reduced by cooperation of the first cut surface 1111 and the second cut surface 1112, thereby reducing the thrust fluctuation of the levitation motor 1000.

[0085] In some embodiments, as shown in FIG. 3, at least part of the first cut surface 1111 and the second cut surface 1112 are formed as bevels. In this way, while ensuring that the gap between the stator 100 and the rotor 200 can be adjusted by cooperation of the first cut surface 1111 and the second cut surface 1112, the difficulty of forming the first cut surface 1111 and the second cut surface 1112 can also be reduced, thereby facilitating reduction of the magnetic resistance mutation of the levitation motor 1000 during operation, reduction of at least one of the cogging force and the end force, and further ensuring the working performance of the levitation motor 1000.

[0086] Of course, in some embodiments, at least part of the first cut surface 1111 and the second cut surface 1112 are formed as arcs; or one of the first cut surface 1111 and the second cut surface 1112 is formed as a bevel and the other is formed as an arc, and the present disclosure does not limit this, as long as the gap between the stator 100 and the rotor 200 can be adjusted by the first cut surface 1111 and the second cut surface 1112, so that the gap between the stator 100 and the rotor 200 can change.

[0087] In other embodiments, at least part of the first cut surface 1111 and the second cut surface 1112 can also be formed as a wavy surface.

[0088] In some embodiments, as shown in FIG. 3, the first cut surface 1111 and the second cut surface 1112 are symmetrically arranged in a plane perpendicular to the axial direction of the split core 111, so that the first cut surface 1111 and the second cut surface 1112 can be arranged in the up-down direction of the stator 100, thereby enabling the first cut surface 1111 and the second cut surface 1112 to face the rotor 200, and facilitating adjustment of the gap between the split core 111 and the rotor 200 by the first cut surface 1111 and the second cut surface 1112.

[0089] Of course, in some embodiments, the first cut surface 1111 and the second cut surface 1112 can also be asymmetrically arranged in a plane perpendicular to the axial direction of the split core 111.

[0090] In some embodiments, as shown in FIGS. 2 and 3, the end of the first cut surface 1111 of the split core 111 at the axial end of the stator 100 close to the mover 200 intersects with the end of the second cut surface 1112 close to the mover 200. Here, it is meant that the first cut surface 1111 and the second cut surface 1112 are provided on the circumferential wall of the mover 200 facing the split core 111 at the axial end of the stator 100, and the end of the first cut surface 1111 of the split core 111 at the axial end of the stator 100 close to the mover 200 intersects with the end of the second cut surface 1112 close to the mover 200.

[0091] In this way, the forming difficulty of the first cut surface 1111 and the second cut surface 1112 can be reduced, and the first cut surface 1111 and the second cut surface 1112 can be respectively inclined to extend relative to the mover 200, so as to facilitate changing the gap between the stator 100 and the mover 200 by using the first cut surface 1111 and the second cut surface 1112, and gradually changing the gap in the axial direction of the stator 100, so as to gradually change the resistance of the split core 111 to the electromagnetic force, thereby reducing the end force and reducing the thrust fluctuation of the levitation motor 1000, and ensuring the working performance of the levitation motor 1000.

[0092] Here, the split core 111 at the axial end of the stator 100 can be understood as the end lamination 1118 described above. That is, the end of the first cut surface 1111 of the end lamination 1118 close to the mover 200 intersects with the end of the second cut surface 1112 close to the mover 200, so as to reduce the forming difficulty of the end lamination 1118 and reduce the end force.

[0093] In some embodiments, as shown in FIGS. 2 and 3, the circumferential wall of the mover 200 facing the remaining split cores 111 except the split core 111 at the axial end further comprises an intermediate connecting surface 1113. The two ends of the intermediate connecting surface 1113 are respectively connected to the first cut surface 1111 and the second cut surface 1112. Here, it can also be understood that when the intermediate lamination 1119 facing the circumferential wall of the mover 200 is provided with the first cut surface 1111 and the second cut surface 1112, the intermediate lamination 1119 facing the circumferential wall of the mover 200 further needs to be provided with the intermediate connecting surface 1113, and the two ends of the intermediate connecting surface 1113 are respectively connected to the first cut surface 1111 and the second cut surface 1112. Since the number of intermediate laminations 1119 is large, by providing the intermediate connecting surface 1113, the gap between the stator 100 and the mover 200 caused by providing the first cut surface 1111 and the second cut surface 1112 on the intermediate lamination 1119 can be avoided to some extent.

[0094] That is, by arranging the intermediate connecting surface 1113 on the circumferential wall of the middle laminations 1119 opposite the mover 200, the intermediate connecting surface 1113 can be used to ensure the gap between the stator 100 and the mover 200. This can to some extent avoid the decrease in peak thrust due to the increase in the gap, thereby to some extent avoid the increase in magnetic resistance, ensure the electromagnetic thrust of the levitation motor 1000, and thereby ensure the working performance of the levitation motor 1000.

[0095] Meanwhile, by arranging the first cut surface 1111 and the second cut surface 1112 on the circumferential wall of the middle laminations 1119 opposite the mover 200, the cogging force can be reduced, thereby reducing the thrust fluctuation of the levitation motor 1000.

[0096] For example, when the middle laminations 1119 are formed, the cut corners can be machined at the connection between the axial end surface of the middle laminations 1119 and the circumferential wall of the middle laminations 1119 opposite the mover 200, and the two cut corners on the middle laminations 1119 are machined to be arranged at intervals in the axial direction of the stator 100. In this way, while the first cut surface 1111 and the second cut surface 1112 are arranged on the circumferential wall of the middle laminations 1119 opposite the mover 200, the first cut surface 1111 and the second cut surface 1112 are also connected by the intermediate connecting surface 1113, thereby reducing the difficulty of forming the intermediate connecting surface 1113 and ensuring the gap between the stator 100 and the mover 200.

[0097] Of course, in some embodiments, the end of the first cut surface 1111 of the split core 111 located at the axial end of the stator 100 close to the mover 200 and the end of the second cut surface 1112 close to the mover 200 can also be connected by the intermediate connecting surface 1113. That is, the intermediate connecting surface 1113 can also be arranged on the circumferential wall of the end laminations 1118 opposite the mover 200 to ensure the gap between the end laminations 1118 and the mover 200.

[0098] It should be noted that since the number of end laminations 1118 is small, even if the gap between the end laminations 1118 and the mover 200 is large, it will not excessively affect the peak thrust. Therefore, in order to reduce the difficulty of forming the end laminations 1118 and improve the forming efficiency, the intermediate connecting surface 1113 can not be arranged on the circumferential wall of the end laminations 1118 (as shown in FIG. 3).

[0099] In summary, the levitation motor 1000 in some embodiments of the present disclosure can reduce the end force and the cogging force by simultaneously arranging the first cut surface 1111 and the second cut surface 1112 on the circumferential wall of the end laminations 1118 and the middle laminations 1119 opposite the mover 200, thereby reducing the magnetic resistance and to some extent avoiding the thrust fluctuation of the levitation motor 1000, thereby ensuring the working performance of the levitation motor 1000.

[0100] It should be noted that when the split core 111 is made of No. 10 steel, the eddy current loss has a greater impact on the magnetic field distribution, and the scheme of simultaneously providing the first cut surface 1111 and the second cut surface 1112 on the circumferential wall of the end lamination 1118 and the middle lamination 1119 opposite to the mover 200 can be used to reduce the magnetic resistance and thus reduce the thrust fluctuation.

[0101] In some embodiments, when the split core 111 is made of cobalt-iron soft magnetic alloy, the iron loss has a very small impact on the magnetic field distribution, and the first cut surface 1111 and the second cut surface 1112 can be provided only on the circumferential wall of the end lamination 1118 opposite to the mover 200 (as shown in FIGS. 7 and 8) without being provided on the circumferential wall of the middle lamination 1119 opposite to the mover 200, so as to simplify the structure of the split core 111 and reduce the forming difficulty of the split core 111.

[0102] In some embodiments, as shown in FIGS. 2 and 4, the mover 200 is provided with a plurality of permanent magnets 210 cooperating with the stator winding 120. The plurality of permanent magnets 210 are sequentially arranged along the moving direction of the mover 200. The cooperation of the permanent magnets 210 and the stator winding 120 can realize the coupling cooperation of the stator 100 and the mover 200, and ensure the working performance of the levitation motor 1000.

[0103] In addition, by arranging the plurality of permanent magnets 210 sequentially along the moving direction of the mover 200, the permanent magnets 210 can always cooperate with the stator winding 120 during the movement of the mover 200, so as to ensure the working performance of the levitation motor 1000.

[0104] For example, the cooperation of the stator winding 120 and the permanent magnets 210 forms the magnetic coupling between the mover 200 and the stator 100. In this way, the mover 200 and the stator 100 can be connected through the magnetic field, so as to facilitate the reciprocating movement of the mover 200, reduce the moving difficulty of the mover 200, and be conducive to ensuring the working performance of the levitation motor 1000.

[0105] In some embodiments, in combination with FIGS. 4 and 6, the plurality of permanent magnets 210 include radial magnetization magnetic steel 211 and axial magnetization magnetic steel 212. In the moving direction of the mover 200, the radial magnetization magnetic steel 211 and the axial magnetization magnetic steel 212 are arranged in a Halbach array. In this way, the mover 200 can generate the strongest magnetic field with the least amount of permanent magnets 210, the sinusoidal nature of the air gap flux waveform distribution can be improved, the harmonic content can be reduced, and the magnet utilization rate can be improved, so that a magnetic flux guide (i.e., a magnetic yoke) is not needed to guide the magnetic flux, and the working performance of the levitation motor 1000 can be ensured.

[0106] It should be noted that the permanent magnet 210 is arranged in different magnetization directions, so that the magnetic field on one side is significantly enhanced, and the magnetic field on the other side is significantly weakened, thereby improving the utilization rate of the permanent magnet 210. The Halbach array structure has a better sinusoidal magnetic field waveform in the working area, reduces the harmonic component, thereby reducing the eddy current loss of the split core 111, improving the sinusoidal nature of the no-load back electromotive force waveform, and helping to reduce the cogging force and thrust fluctuation, and improving the stability of the operation of the suspension motor 1000.

[0107] In some embodiments, as shown in FIG. 6, the radially magnetized magnetic steel 211 includes a first radially magnetized magnetic steel 2111 and a second radially magnetized magnetic steel 2112. The axially magnetized magnetic steel 212 includes a first axially magnetized magnetic steel 2121 and a second axially magnetized magnetic steel 2122. The first radially magnetized magnetic steel 2111 and the second radially magnetized magnetic steel 2112 are radially magnetized but in opposite directions, and the first axially magnetized magnetic steel 2121 and the second axially magnetized magnetic steel 2122 are axially magnetized but in opposite directions. The first radially magnetized magnetic steel 2111, the first axially magnetized magnetic steel 2121, the second radially magnetized magnetic steel 2112, and the second axially magnetized magnetic steel 2122 are arranged in sequence along the moving direction of the mover 200, so that the plurality of permanent magnets 210 can be arranged in a Halbach array along the moving direction of the mover 200, to ensure the working performance of the suspension motor 1000.

[0108] It should be noted that, due to the suspension motor 1000 in some embodiments of the present disclosure, the array arrangement of the plurality of permanent magnets 210 is arranged to increase the magnetic field. Therefore, the shell of the suspension motor 1000 can be made of aluminum alloy material to reduce the manufacturing cost of the shell and achieve the lightweight of the suspension motor 1000.

[0109] In some embodiments, as shown in FIGS. 4 and 6, in the moving direction, the height of the radially magnetized magnetic steel 211 is H1, the height of the axially magnetized magnetic steel 212 is H2, and H1 / (H1+H2)=0.65-0.85. Here, the moving direction is the moving direction of the mover 200. By the above arrangement, a suitable pole arc coefficient can be formed. In this way, the electromagnetic thrust of the suspension motor 1000 can be increased, and in addition, the thrust fluctuation of the suspension motor 1000 during operation can be reduced as much as possible, thereby ensuring the working performance of the suspension motor 1000.

[0110] It should be noted that when H1 / (H1+H2) < 0.65, under the premise that the height H1 of the radially magnetized magnetic steel 211 is constant, the height H2 of the axially magnetized magnetic steel 212 is high, that is, the axially magnetized magnetic steel 212 is too thick, which further causes the repulsive force of the axially magnetized magnetic steel 212 to be large during assembly, thereby increasing the difficulty of assembly. When H1 / (H1+H2) < 0.65, under the premise that the height H2 of the axially magnetized magnetic steel 212 is constant, the height H1 of the radially magnetized magnetic steel 211 is small, that is, the radially magnetized magnetic steel 211 is too thin, which further causes the radially magnetized magnetic steel 211 to be difficult to produce and assemble, and affects the working performance of the radially magnetized magnetic steel 211.

[0111] Correspondingly, when H1 / (H1+H2) > 0.85, under the premise that the height H1 of the radially magnetized magnetic steel 211 is constant, the height H2 of the axially magnetized magnetic steel 212 is small, that is, the axially magnetized magnetic steel 212 is too thin, which further causes the axially magnetized magnetic steel 212 to be difficult to produce and assemble, and affects the working performance of the axially magnetized magnetic steel 212; when H1 / (H1+H2) > 0.85, under the premise that the height H2 of the axially magnetized magnetic steel 212 is constant, the height H1 of the radially magnetized magnetic steel 211 is high, that is, the radially magnetized magnetic steel 211 is too thick, which further causes the repulsive force of the radially magnetized magnetic steel 211 to be large during assembly, thereby increasing the difficulty of assembly.

[0112] Therefore, the suspension motor 1000 in some embodiments of the present disclosure can optimize the height H1 of the radially magnetized magnetic steel 211 and the height H2 of the axially magnetized magnetic steel 212 by setting H1 / (H1+H2) = 0.65-0.85. When the height of the radially magnetized magnetic steel 211 and the height of the axially magnetized magnetic steel 212 are small, the radially magnetized magnetic steel 211 and the axially magnetized magnetic steel 212 are too thin, which further causes the radially magnetized magnetic steel 211 and the axially magnetized magnetic steel 212 to be difficult to produce and assemble, and affects the magnetic conductivity of the radially magnetized magnetic steel 211 and the axially magnetized magnetic steel 212; when the height of the radially magnetized magnetic steel 211 and the height of the axially magnetized magnetic steel 212 are large, the radially magnetized magnetic steel 211 and the axially magnetized magnetic steel 212 are too thick, which further causes the radially magnetized magnetic steel 211 and the axially magnetized magnetic steel 212 to have a large repulsive force during assembly, thereby increasing the difficulty of assembly.

[0113] Therefore, by setting H1 / (H1+H2) = 0.65-0.85, the assembly difficulty of the suspension motor 1000 can be reduced, the assembly efficiency can be improved, and the working performance of the suspension motor 1000 can be ensured.

[0114] In some embodiments, H1 / (H1+H2) is 0.65, 0.7, 0.75, 0.8, or 0.85, etc.

[0115] In some embodiments, H1 / (H1+H2) = 0.7. In this way, the pole arc coefficient can be further optimized, the electromagnetic thrust of the levitation motor 1000 is increased, and the thrust fluctuation of the levitation motor 1000 during operation is minimized as much as possible, thereby ensuring the working performance of the levitation motor 1000.

[0116] It should be noted that when H1 / (H1+H2) = 0.7, the electromagnetic thrust of the levitation motor 1000 can be close to or reach the maximum value, thereby facilitating the working performance of the levitation motor 1000.

[0117] In some embodiments, the number of slots of the plurality of accommodating slots 112 and the number of poles of the plurality of permanent magnets 210 satisfy the following condition: 3 / 4≤Z / P≤3 / 2, at the maximum coupling length of the stator 100 and the mover 200.

[0118] Here, the number of slots Z of the plurality of accommodating slots 112 can be understood as the sum of the number of slots of the plurality of accommodating slots 112 at the maximum coupling length of the stator 100 and the mover 200. The number of poles P of the plurality of permanent magnets 210 can be understood as the sum of the number of poles of the plurality of permanent magnets 210 at the maximum coupling length of the stator 100 and the mover 200. The maximum coupling length of the stator 100 and the mover 200 refers to the projection overlapping length of the stator 100 and the mover 200 in the axial direction of the levitation motor 1000, i.e., the length of the stator 100 in FIG. 2.

[0119] That is, the ratio of the number of slots of the plurality of accommodating slots 112 to the number of poles of the permanent magnets 210 facing the plurality of accommodating slots 112 is in the range of 3 / 4-3 / 2 during the coupling of the mover 200 and the stator 100. In this way, the coupling length of the stator 100 and the mover 200 can be ensured, thereby making the electromagnetic thrust of the levitation motor 1000 relatively large and ensuring the working performance of the levitation motor 1000.

[0120] In some embodiments, the ratio of the number of slots of the accommodating slots 112 to the number of poles of the permanent magnets 210 is 3 / 4, 4 / 5, 6 / 7, 1, 6 / 5, or 3 / 2, etc.

[0121] In some embodiments, the ratio of Z to P satisfies the following condition: 3 / 4≤Z / P<1. That is, the ratio of the number of slots of the accommodating slots 112 to the number of poles of the permanent magnets 210 can also be in the range of 3 / 4-1, so that the thrust of the levitation motor 1000 is relatively stable.

[0122] It should be noted that, within the allowable range of the size of the levitation motor 1000, the number of accommodating slots 112 and the number of poles of the permanent magnets 210 can be selected as much as possible, which can weaken the cogging force, thereby weakening the magnetic permeability mutation trend of the permanent magnets 210 to the accommodating slots 112 and reducing the cogging force.

[0123] In addition, with the same number of slots of the accommodating slots 112, the cogging force can gradually decrease with the increase of the number of poles of the permanent magnets 210.

[0124] In some embodiments, the ratio of Z to P satisfies the following condition: 6 / 7≤Z / P≤6 / 5. That is, the ratio of the number of slots of the accommodating slots 112 to the number of poles of the permanent magnets 210 can also be in the range of 6 / 7 to 6 / 5. It should be noted that the larger the least common multiple of the number of slots of the accommodating slots 112 and the number of poles of the permanent magnets 210, the lower the cogging force fundamental wave amplitude, and thus the cogging force can be weakened. When the ratio of the number of slots of the accommodating slots 112 to the number of poles of the permanent magnets 210 is in the range of 6 / 7 to 6 / 5, the least common multiple of the number of slots of the accommodating slots 112 and the number of poles of the permanent magnets 210 is larger, and the cogging force is smaller, thereby ensuring the working performance of the levitation motor 1000.

[0125] It should be noted that the opening of the cores at both ends of the levitation motor 1000 is an important reason for the sudden change of permeability near the ends of the cores. The sudden change of permeability causes the end effect of the ends of the cores, thereby generating an end force, and the slotting of the cores generates a cogging force. The end force and the cogging force are collectively referred to as magnetic drag, which is an important factor causing the periodic fluctuation of the thrust of the levitation motor 1000. The levitation motor 1000 in some embodiments of the present disclosure can reduce the cogging force by reasonably selecting the ratio of the number of slots of the plurality of accommodating slots 112 to the number of poles of the plurality of permanent magnets 210, thereby facilitating the reduction of the thrust fluctuation.

[0126] In some embodiments, as shown in FIGS. 1 and 2, the mover 200 is sleeved on the outer periphery of the stator 100, so that the levitation motor 1000 is formed in the structure of an inner stator and an outer mover. In this way, while ensuring that the mover 200 can move relative to the stator 100 to ensure the working performance of the mover 200, the air gap diameter of the levitation motor 1000 can be larger under the same size boundary or the same volume, so as to increase the thrust of the levitation motor 1000, thereby ensuring the working performance of the levitation motor 1000.

[0127] Of course, in some embodiments, the stator 100 can also be sleeved on the outer periphery of the mover 200, which is not shown in the example diagram.

[0128] In some embodiments, the levitation motor 1000 further comprises a guide rod. The guide rod is arranged between the stator 100 and the mover 200, so as to guide the moving direction of the mover 200 by the guide rod, avoid the mover 200 from deviating during the movement, and thus ensure that the mover 200 can move in the intended direction and ensure the accuracy of the movement of the mover 200. In this way, the relative distance between the axial directions of the stator 100 and the mover 200 during the mutual movement can be ensured to remain unchanged to some extent, so that the wheel can move in the intended direction and ensure the stability of the vehicle during driving. It can also be understood that the working performance of the levitation motor 1000 is ensured.

[0129] It should be noted that when the mover 200 is sleeved on the outer periphery of the stator 100, one end of the guide rod extends into the mover 200 and is connected to the stator 100, and the other end of the guide rod extends out through the mover 200 and is connected to the support seat 300 (the structure of the support seat 300 can be referred to FIG. 1). The support seat 300 is adapted to be mounted to the vehicle to mount the stator 100 to the vehicle, so as to realize the cooperative connection of the levitation motor 1000 and the vehicle, facilitate the use of the levitation motor 1000 to buffer the impact from the road surface during the driving of the vehicle, improve the smoothness of the vehicle, and thus ensure the comfort of the vehicle.

[0130] In some embodiments, as shown in FIG. 2, in the moving direction of the mover 200, the extension length of the mover 200 is greater than the extension length of the stator 100, so that the levitation motor 1000 is formed in the structure form of a short stator or a long mover. In this way, it is beneficial to reduce the amount of copper, improve the utilization rate of the winding, and reduce the copper loss, so as to ensure the working efficiency of the levitation motor 1000.

[0131] Of course, in some embodiments, the extension length of the stator 100 can also be set to be greater than the extension length of the mover 200 in the moving direction of the mover 200. In this way, the coupling length of the mover 200 and the stator 100 can also be ensured to remain unchanged at all times, so as to ensure the working performance of the levitation motor 1000.

[0132] In some embodiments, as shown in FIG. 1, the levitation motor 1000 further comprises a protective sleeve 400. The protective sleeve 400 is arranged on the outer periphery of the mover 200 and located between the mover 200 and the support seat 300. In this way, the protective sleeve 400 can be used to protect the mover 200 and the stator 100, prolong the service life of the levitation motor 1000, and ensure the working performance of the levitation motor 1000.

[0133] In some embodiments, the protective sleeve 400 can be made of at least one of waterproof or dustproof materials, so that the protective sleeve 400 is formed as at least one of a dustproof cover or a waterproof cover, so as to avoid the influence of dust, water stains, etc. on the levitation motor 1000 and ensure the reliability of the levitation motor 1000. In some embodiments, the protective sleeve 400 can be made of at least one of waterproof or dustproof materials, so that the protective sleeve 400 is formed as at least one of a dustproof cover or a waterproof cover, so as to avoid the influence of dust, water stains, etc. on the levitation motor 1000 and ensure the reliability of the levitation motor 1000.

[0134] In some embodiments, the two ends of the protective sleeve 400 are fixedly connected with the mover 200 and the support base 300 respectively, so as to realize the fixed connection of the protective sleeve 400 with the mover 200 and the stator 100, facilitate the support of the protective sleeve 400 by the mover 200 and the stator 100, improve the position stability of the protective sleeve 400, avoid the position deviation of the protective sleeve 400 relative to the mover 200 and the stator 100, and thus ensure that the protective sleeve 400 can be stably arranged between the mover 200 and the support base 300, so that the protective sleeve 400 can effectively protect the mover 200 and the stator 100.

[0135] In some embodiments, as shown in FIG. 1, the suspension motor 1000 further includes a lower tray 500 and a damping spring 600. The lower tray 500 is arranged on the outer peripheral wall of the mover 200, and the support base 300 and the lower tray 500 define a placement space for placing the damping spring 600. The damping spring 600 is placed in the placement space to be fixed by the cooperation of the support base 300 and the lower tray 500. In this way, when the vehicle is excited by the road surface and the mover 200 performs the up-down stretching movement, the damping spring 600 can be used for buffering and absorbing vibration, and in addition, the damping spring 600 can also play a certain damping effect, thereby improving the damping effect of the suspension motor 1000 and the comfort of the vehicle.

[0136] That is to say, the suspension motor 1000 in some embodiments of the present disclosure can ensure that the damping spring 600 can be formed on the suspension motor 1000 by arranging the lower tray 500 on the outer peripheral wall of the mover 200 to form a placement space for placing the damping spring 600, thereby improving the damping effect of the suspension motor 1000.

[0137] In some embodiments, as shown in FIG. 1, the damping spring 600 is arranged between the support base 300 and the lower tray 500, and the upper end of the damping spring 600 abuts against the support base 300, and the lower end of the damping spring 600 abuts against the lower tray 500. In this way, during the movement of the mover 200, the damping spring 600 can be compressed or stretched to provide part of the damping force and bear part of the vibration impact, thereby improving the comfort of the vehicle. Here, the upper end of the damping spring 600 can refer to the end of the damping spring 600 away from the mover 200, and the lower end of the damping spring 600 can refer to the end of the damping spring 600 close to the mover 200.

[0138] In some embodiments, as shown in FIG. 1, the damping spring 600 is sleeved on the outer periphery of the protective sleeve 400. In this way, the damping spring 600 can be cooperated with the protective sleeve 400 between the mover 200 and the support base 300, so as to obviously improve the space utilization of the suspension motor 1000 and enhance the compactness of the suspension motor 1000.

[0139] In some embodiments, the suspension motor 1000 is a cylindrical three-phase permanent magnet synchronous suspension motor 1000. The structure of the cylindrical suspension motor 1000 is relatively closed, has good sealing performance, and does not have single-sided magnetic pull. Moreover, compared with a single-phase cylindrical permanent magnet synchronous suspension motor, the cylindrical three-phase permanent magnet synchronous suspension motor 1000 can make the thrust of the suspension motor 1000 larger, so as to ensure the working performance of the suspension motor 1000.

[0140] A suspension system of some embodiments of the present disclosure is described below.

[0141] A suspension system according to an embodiment of the present disclosure comprises a suspension motor 1000.

[0142] The suspension motor 1000 is the aforementioned suspension motor 1000, and the structure of the suspension motor 1000 is not described herein again. One of the mover 200 and the stator 100 of the suspension motor 1000 is connected with a wheel end, and the other is connected with a vehicle body end.

[0143] As can be seen from the above structure, the suspension system of some embodiments of the present disclosure can ensure the working performance of the suspension system by using the aforementioned suspension motor 1000.

[0144] In some embodiments, the stator 100 is adapted to be connected with the vehicle body end of a vehicle, and the mover 200 is adapted to be connected with the wheel end of the vehicle. During the movement of the wheel relative to the vehicle body, the mover 200 moves relative to the stator 100 to buffer the impact transmitted by the road surface, and can isolate the noise input by the road surface and the tire, so as to ensure the comfort of the vehicle.

[0145] In some embodiments, as shown in FIG. 1, the mover 200 is provided with a connecting arm 220. The mover 200 is connected with the wheel end of the vehicle through the connecting arm 220, and the stator 100 is connected with the vehicle body end of the vehicle through a support seat 300, so that the suspension motor 1000 is arranged on the vehicle, so as to improve the comfort of the vehicle by using the suspension motor 1000.

[0146] Of course, in some embodiments, the stator 100 can also be connected with the wheel end of the vehicle, and the mover 200 can be connected with the vehicle body end of the vehicle, which is not limited in the present disclosure.

[0147] In some embodiments, the vehicle has a plurality of wheel ends, and each wheel end is provided with a suspension motor 1000. In this way, during the movement of the vehicle, when each wheel moves relative to the vehicle body, the suspension motor 1000 can be used to buffer the impact transmitted by the road surface, and can isolate the noise input by the road surface and the tire, so as to ensure the comfort of the vehicle to a certain extent and improve the driving experience.

[0148] For example, when the suspension system is applied to a family vehicle (such as a small car, a compact car, a sports car, a sport utility vehicle, etc.), the suspension system comprises four suspension motors 1000, which are in one-to-one correspondence with four wheel ends.

[0149] A vehicle of some embodiments of the present disclosure is described below.

[0150] A vehicle according to some embodiments of the present disclosure comprises a suspension system.

[0151] The suspension system is the aforementioned suspension system, and the structure of the suspension system is not described here.

[0152] As can be seen from the above structure, the vehicle of some embodiments of the present disclosure can effectively improve the smoothness of the vehicle driving by using the aforementioned suspension system, and ensure the driving experience.

[0153] In the description of the present disclosure, it should be noted that unless specifically defined and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0154] The suspension motor 1000, the suspension system and the vehicle according to some embodiments of the present disclosure are known to those skilled in the art, and will not be described in detail here.

[0155] In the description of the present disclosure, the description of the terms "embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0156] Although the embodiments of the present disclosure have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A suspension motor, comprising: a mover (200); and a stator (100) coupled with the mover (200) to allow the mover (200) to reciprocate, the stator (100) comprising: a stator core (110) comprising: a stator yoke (1114); and a plurality of stator teeth (1115) arranged along an axial direction of the stator core (110); a stator winding (120); and a receiving slot (112) formed between any two adjacent stator teeth (1115) of the plurality of stator teeth (1115) to receive the stator winding (120); wherein a width of the stator yoke (1114) in a radial direction of the stator (100) is W1, a width of any one of the plurality of stator teeth (1115) in the axial direction of the stator (100) is L1, and W1 / L1 = 0.55-0.

9. W1 / L1 = 0.

7.

2. The flux motor of claim 1, wherein, The mover (200) is provided with a plurality of permanent magnets (210) cooperating with the stator winding (120), the plurality of permanent magnets (210) being arranged in sequence along a moving direction of the mover (200).

3. The flux motor of claim 1, wherein, The plurality of permanent magnets (210) comprises radially magnetized magnetic steel (211) and axially magnetized magnetic steel (212), the radially magnetized magnetic steel (211) and the axially magnetized magnetic steel (212) being arranged in a Halbach array in the moving direction of the mover (200).

4. The flux motor of claim 3, wherein, In the moving direction of the mover (200), a height of the radially magnetized magnetic steel (211) is H1, and a height of the axially magnetized magnetic steel (212) is H2, wherein H1 / (H1+H2) = 0.65-0.

85.

5. The flux motor of claim 4, wherein, The plurality of stator teeth (1115) forms one or more receiving slots (112), under a maximum coupling length of the stator (100) and the mover (200), a slot number of the plurality of receiving slots (112) is Z, a pole number of the plurality of permanent magnets (210) is P, and the Z and the P satisfy the following condition: 3 / 4≤Z / P≤3 / 2.

6. The flux motor of claim 3, wherein, The Z and the P satisfy the following condition: 3 / 4≤Z / P<1.

7. The flux motor of claim 6, wherein, The Z and the P satisfy the following condition: 6 / 7≤Z / P≤6 / 5.

8. The flux motor of claim 6 wherein, 9. A suspension system comprising the suspension motor according to any one of claims 1-8, one of the mover (200) and the stator (100) being connected to a wheel end, and the other being connected to a body end.

10. The suspension system according to claim 9, comprising a plurality of wheel ends, each of the plurality of wheel ends being provided with the suspension motor.

11. A vehicle comprising the suspension system according to claim 9 or 10. ​

Images