Linear motor

Abstract

The invention provides a linear motor. The linear motor comprises a stator and a mover which linearly moves along a first direction relative to the stator, and the mover comprises a mover iron core and a plurality of groups of coils; the rotor iron core comprises a yoke part and a plurality of tooth parts, the plurality of tooth parts are connected with the yoke part and arranged at intervals in the first direction, each tooth part extends in the second direction, and a wire slot is formed between every two adjacent tooth parts in the plurality of tooth parts; the plurality of groups of coils are respectively sleeved on at least partial tooth parts in the plurality of tooth parts; wherein the length of each tooth part in the plurality of tooth parts in the second direction is a first length, the width of each tooth part in the plurality of tooth parts in the first direction is a first width, the length of the coil in the second direction is a second length, the sum of the width of the wire slot in the first direction and the first width is a second width, and the first length is smaller than the second length; the ratio of the first width to the second width is larger than or equal to 0.25 and smaller than or equal to 0.55.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors, and in particular to a linear motor. Background Art

[0002] At present, linear motors include stators and movers. The stator can drive the mover to move linearly, thereby achieving power output.

[0003] In the related art, there is an iron core linear motor with large thrust and high winding efficiency, but large cogging force and magnetic attraction force. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present invention provides a linear motor.

[0006] In view of this, a first aspect of the present invention provides a linear motor, comprising a stator and a mover which moves linearly along a first direction relative to the stator, the mover comprising a mover core and multiple groups of coils; the mover core comprising a yoke and multiple teeth, the multiple teeth are connected to the yoke and arranged at intervals along the first direction, each of the multiple teeth extends along the second direction, and a wire slot is arranged between two adjacent teeth in the multiple teeth; the multiple groups of coils are respectively sleeved on at least part of the multiple teeth; wherein the length of each of the multiple teeth in the second direction is a first length, the width of each of the multiple teeth in the first direction is a first width, the length of the coil in the second direction is a second length, the sum of the width of the wire slot in the first direction and the first width is the second width, the first length is less than the second length, and the ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.55.

[0007] The linear motor provided by the present application includes a rotor core, the rotor core includes a yoke and a plurality of teeth, the plurality of teeth are connected to the yoke, and are arranged at intervals along a first direction, each of the plurality of teeth extends along a second direction, and a plurality of coils are respectively sleeved on at least part of the teeth of the plurality of teeth, so that the coils can be installed and positioned through the teeth; the coils can generate a magnetic field after being energized, so that the stator of the motor can drive the rotor to move along the stator through the coils to achieve power output. The length of each of the plurality of teeth in the second direction is the first length, and the length of each of the plurality of coils in the second direction is the second length, and the second length is greater than the first length, that is, the length of the teeth in the second direction is less than the length of the coil in the second direction, so that the length of the teeth in the second direction is shorter, thereby reducing the cogging force and the magnetic attraction, while improving the winding use efficiency, thereby improving the thrust density of the motor. And the length of the teeth in the second direction is less than the length of the coil in the second direction, and the rotor in which each tooth is inserted into the coil has the characteristics of short coil ends and low copper loss.

[0008] The sum of the width of the wire groove in the first direction and the first width is the second width, that is, the slot distance between two adjacent wire grooves in the first direction is the second width. By adjusting the relationship between the width of each tooth portion in the first direction and the slot distance between two adjacent wire grooves in the first direction in the plurality of tooth portions, the thrust output by the mover can be adjusted, thereby increasing the thrust output by the motor when the motor has certain losses. The ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.55, which effectively increases the thrust output by the mover without increasing the losses of the motor, thereby improving the overall performance of the motor.

[0009] The stator is arranged at one side of the mover core, and can drive the mover core to move linearly along a first direction, thereby realizing power output by driving the mover core to move linearly along the first direction.

[0010] Furthermore, the first length is proportional to the first width, which can increase the thrust of the motor output without increasing the loss of the motor, thereby improving the output capacity of the motor; and because the first length is proportional to the first width, it is also possible to reduce the loss of the motor while maintaining a certain thrust of the motor, thereby improving the efficiency of the motor.

[0011] Since the thrust of the motor can be increased and the use efficiency of the winding can be improved under certain heating conditions by setting the first length and the first width to be in direct proportion, the heat generated by the motor during operation can be reduced by setting the first length and the first width to be in direct proportion, thereby reducing the temperature rise of the motor and further improving the quality of the motor.

[0012] Furthermore, the mover also includes an insulating frame and a plastic packaging material. The insulating frame is embedded in the wire slot, the coil is wound on the insulating frame, and the plastic packaging material is coated on the outside of the coil, thereby realizing the installation and positioning of the coil.

[0013] The insulating frame can be an integral structure with holes, which can cover all the wire slots from the tip surface of the tooth, thereby achieving insulation safety and low-cost manufacturing. The winding is an air-core winding, which can achieve a high full slot rate and simple and convenient installation.

[0014] The plastic encapsulation material is Bulk Molding Compound (BMC), which can achieve high thermal conductivity and rapid manufacturing.

[0015] Furthermore, the mover core can be made by stamping silicon steel sheets or by processing structural steel. The mover core made by processing structural steel has the advantages of low cost such as no need for molds and easy processing.

[0016] Specifically, the yoke is arranged in a strip shape, and the multiple teeth are arranged at intervals along a first direction, which may be the length direction of the yoke. There is a gap between two adjacent teeth among the multiple teeth, and the multiple groups of coils are respectively mounted on the multiple teeth, and at least a portion of each group of coils among the multiple groups of coils is embedded in the gap between two adjacent teeth.

[0017] Each of the multiple tooth portions may be sleeved with a coil, or a coil may be sleeved with every other tooth portion among the multiple tooth portions.

[0018] Specifically, the second direction is perpendicular to the first direction, and the second direction is perpendicular to a surface of the yoke on which the teeth are disposed.

[0019] In addition, the mover in the above technical solution provided by the present invention may also have the following additional technical features:

[0020] In a technical solution of the present invention, optionally, the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, and the ratio of the first width to the second width is greater than or equal to 0.35 and less than or equal to 0.55.

[0021] In this technical solution, when the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width is set to greater than or equal to 0.35 and less than or equal to 0.55, which effectively improves the thrust output by the mover without increasing the loss of the motor, thereby improving the overall performance of the motor.

[0022] Specifically, when the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width may be 0.35.

[0023] When the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width may also be 0.38, 0.40, 0.43, 0.49, 0.5, 0.52 or 0.53.

[0024] When the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width may also be 0.55.

[0025] Further, when the length of each tooth portion in the second direction of the plurality of tooth portions is less than the length of the coil in the second direction, the plurality of tooth portions are short teeth. When the length of each tooth portion in the second direction of the plurality of tooth portions is equal to the length of the coil in the second direction, the plurality of tooth portions are full teeth. The ratio of the length of the short tooth in the second direction to the length of the full tooth in the second direction is the tooth length ratio, that is, the ratio of the first length to the second length is the tooth length ratio.

[0026] The ratio of the width of each tooth portion in the first direction to the slot pitch of the wire slot in the first direction is the tooth width ratio, that is, the ratio of the first width to the second width is the tooth width ratio.

[0027] The thrust ratio is based on the situation when the middle teeth of the winding are the narrowest, and the thrust ratio at this time is set to 1.

[0028] When the tooth length ratio is equal to 1, curve 1 is the changing relationship between the tooth width ratio and the thrust ratio.

[0029] When the tooth length ratio is equal to 0.93, curve 2 is the changing relationship between the tooth width ratio and the thrust ratio.

[0030] When the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width is 0.4 to 0.45. Within this numerical range, the thrust output by the motor is maximized, thereby improving the performance of the motor.

[0031] In a technical solution of the present invention, optionally, the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, and the ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.45.

[0032] In this technical solution, when the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width is set to greater than or equal to 0.25 and less than or equal to 0.45, which effectively improves the thrust output by the mover without increasing the loss of the motor, thereby improving the overall performance of the motor.

[0033] Further, when the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width is greater than or equal to 0.3 and less than or equal to 0.45.

[0034] Specifically, when the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width may be 0.25.

[0035] When the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width may also be 0.28, 0.30, 0.33, 0.39, 0.4, 0.42 or 0.43.

[0036] When the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width may also be 0.45.

[0037] The ratio of the width of each tooth portion in the first direction to the slot pitch of the wire slot in the first direction is the tooth width ratio, that is, the ratio of the first width to the second width is the tooth width ratio.

[0038] The thrust ratio is based on the situation when the middle teeth of the winding are the narrowest, and the thrust ratio at this time is set to 1.

[0039] When the tooth length ratio is equal to 0.73, curve 3 is the changing relationship between the tooth width ratio and the thrust ratio.

[0040] When the tooth length ratio is equal to 0.64, curve 4 is the changing relationship between the tooth width ratio and the thrust ratio.

[0041] When the tooth length ratio is equal to 0.47, curve 5 is the changing relationship between the tooth width ratio and the thrust ratio.

[0042] When the tooth length ratio is equal to 0.36, curve 6 is the changing relationship between the tooth width ratio and the thrust ratio.

[0043] It can be seen from curves 3, 4, 5 and 6 that when the ratio of the first length to the second length is greater than or equal to 0.3 and less than 0.8, the ratio of the first width to the second width is 0.3 to 0.35. Within this numerical range, the thrust output by the motor is maximized, thereby improving the performance of the motor.

[0044] Furthermore, when the motor has smaller loss and larger thrust, the variation pattern of the tooth length ratio and the tooth width ratio can be divided into two approximate straight lines.

[0045] When the tooth length ratio is less than 0.8, the tooth length ratio and tooth width ratio change little, and the tooth width ratio ranges from 0.3 to 0.4.

[0046] When the tooth length ratio is greater than or equal to 0.8, the tooth length ratio and the tooth width ratio vary greatly, and the tooth width ratio ranges from 0.35 to 0.45.

[0047] Considering the magnetic saturation trend of the comprehensive tooth, when the tooth length ratio is greater than 0.1 and less than 0.8, the tooth width ratio ranges from 0.25 to 0.45; when the tooth length ratio is greater than or equal to 0.8 and less than 1, the tooth width ratio ranges from 0.35 to 0.55.

[0048] In a technical solution of the present invention, optionally, the ratio of the first length to the second length is greater than or equal to 0.5 and less than or equal to 0.7, and the ratio of the first width to the second width is greater than or equal to 0.35 and less than or equal to 0.45.

[0049] In this technical solution, the ratio of the first length to the second length is greater than or equal to 0.5 and less than or equal to 0.7, and the ratio of the first width to the second width is set to greater than or equal to 0.35 and less than or equal to 0.45, which further improves the thrust output by the mover without increasing the loss of the motor, thereby improving the overall performance of the motor.

[0050] In one technical solution of the present invention, optionally, the multiple tooth portions include at least two first teeth and multiple second teeth; the at least two first teeth are respectively arranged at the two ends of the yoke; the multiple second teeth are arranged between the at least two first teeth; and the first length of the first tooth is smaller than the first length of the second tooth.

[0051] In this technical solution, the multiple tooth portions include at least two first teeth and multiple second teeth, the at least two first teeth are respectively arranged at the two ends of the yoke, and the multiple second teeth are arranged between the at least two first teeth. The first length of the first tooth is smaller than the first length of the second tooth. The at least two first teeth located at the two ends of the yoke can reduce the cogging force of the motor and improve the stability of the motor during movement.

[0052] In a technical solution of the present invention, optionally, multiple groups of coils are respectively sleeved on multiple second teeth, and two adjacent groups of coils in the multiple groups of coils are located in the same wire slot.

[0053] In this technical solution, multiple groups of coils are respectively mounted on multiple second teeth. After the coils are energized, a group of coils is wound around each second tooth to enhance the magnetic field strength generated by the coils, thereby further enhancing the thrust output by the mover.

[0054] In a technical solution of the present invention, optionally, the plurality of tooth portions include a plurality of winding teeth and non-winding teeth arranged alternately, and the plurality of groups of coils are respectively sleeved on the plurality of winding teeth.

[0055] In this technical solution, the multiple teeth include multiple winding teeth and non-winding teeth arranged alternately, and the multiple groups of coils are respectively sleeved on the multiple winding teeth, that is, one group of coils is wound around each tooth in the multiple teeth, thereby reducing the number of coils and saving the manufacturing cost of the mover. In addition, the multiple groups of coils are respectively sleeved on the multiple winding teeth, which simplifies the coil winding process, reduces the difficulty of coil winding, and thus improves the production efficiency of the mover.

[0056] Furthermore, the multiple tooth portions also include two first teeth, and the two first teeth are respectively located at two ends of the multiple winding teeth and non-winding teeth. The two first teeth can reduce the cogging force of the motor and further improve the stability of the motor during operation.

[0057] In a technical solution of the present invention, optionally, each of the multiple coil groups includes a first coil segment and a second coil segment. The first coil segment is sleeved on the tooth portion and located in the wire slot; the second coil segment is connected to the first coil segment and extends between the tooth portion and the stator.

[0058] In this technical solution, the first coil segment is sleeved on the tooth portion to achieve installation and positioning of the coil.

[0059] The second coil segment is connected to the first coil segment and extends between the tooth portion and the stator, effectively utilizing the space between the tooth portion and the stator, thereby improving the utilization rate of the internal space of the motor. The second coil segment extends between the tooth portion and the stator, increasing the area of ​​the coil, thereby increasing the coil with high magnetic flux density, and further improving the thrust that the motor can output. The second coil segment extends between the tooth portion and the stator, which can also make the structure of the motor more compact, while increasing the thrust output by the motor, reducing the size of the motor, thereby reducing the space occupied by the motor.

[0060] Specifically, a portion of the coil protrudes into between the second tooth and the stator, but the length of the coil in the second direction remains unchanged, that is, the coil enters between the stator and the second tooth along the first direction.

[0061] Furthermore, the coil enters between the second tooth provided with the coil and the stator.

[0062] In a technical solution of the present invention, optionally, the width of the second coil segment in the first direction is greater than the width of the first coil segment in the first direction, and the second coil segments of two adjacent groups of coils are insulated.

[0063] In this technical solution, the width of the second coil segment in the first direction is greater than the width of the first coil segment in the first direction, so that the coil can extend to the space between the tooth portion and the stator on both sides in the first direction, further increasing the area of ​​the coil, increasing the number of coils with high magnetic flux density, and further improving the thrust that the motor can output.

[0064] In a technical solution of the present invention, optionally, the stator includes a body and a plurality of magnetic components, and the plurality of magnetic components are provided on the body and arranged along a first direction opposite to the plurality of coil groups.

[0065] In this technical solution, the stator includes a body and a plurality of magnetic parts, and the plurality of magnetic parts are arranged on the body, and the magnetic parts are then positioned by the body. The plurality of magnetic parts are arranged along a first direction, opposite to the plurality of coils, and the plurality of magnetic parts can generate a magnetic field, and after the coils of the mover are energized, a magnetic field can also be generated around the coils. When the motor is working, the stator is fixed, and after the coils are energized, the magnetic field generated by the coils interacts with the magnetic field generated by the magnetic parts, thereby achieving the output of power by driving the mover in the first direction through the stator.

[0066] Furthermore, the magnetic component is bonded to the body.

[0067] The mover of the motor is supported by a support mechanism such as a linear guide and moves linearly along the stator.

[0068] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0070] Figure 1 is a schematic structural diagram of a mover according to an embodiment of the present invention;

[0071] Figure 2 is one of the structural schematic diagrams of a motor according to an embodiment of the present invention;

[0072] Figure 3 for Figure 2 A cross-sectional view of a motor along AA according to an embodiment of the present invention is shown;

[0073] Figure 4 A schematic diagram showing the relationship between the thrust ratio and the tooth width ratio of a motor according to an embodiment of the present invention;

[0074] Figure 5 A schematic diagram of the relationship between the tooth width ratio and the tooth length ratio of a motor according to an embodiment of the present invention;

[0075] Figure 6 for Figure 2 A cross-sectional view of a motor along line BB according to an embodiment of the present invention is shown;

[0076] Figure 7The second structural schematic diagram of a motor according to an embodiment of the present invention;

[0077] Figure 8 for Figure 7 A cross-sectional view of a motor along CC according to an embodiment of the present invention is shown;

[0078] Fig. 9 The third structural schematic diagram of a motor according to an embodiment of the present invention;

[0079] Fig.10 for Fig. 9 A cross-sectional view of a motor along DD according to an embodiment of the present invention is shown;

[0080] Fig.11 This is a fourth structural schematic diagram of a motor according to an embodiment of the present invention;

[0081] Fig.12 for Fig.11 A cross-sectional view of a motor along line EE according to an embodiment of the present invention is shown.

[0082] in, Figures 1 to 12 The corresponding relationship between the reference numerals and component names in the figure is:

[0083] 100 mover, 110 mover core, 112 yoke, 114 wire slot, 120 tooth, 122 first tooth, 124 second tooth, 126 non-winding tooth, 128 winding tooth, 130 coil, 132 first coil segment, 134 second coil segment, 200 stator, 210 body, 220 magnetic part. DETAILED DESCRIPTION

[0084] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0085] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0086] Refer to the following Figures 1 to 12 A linear motor according to some embodiments of the present invention is described.

[0087] In one embodiment of the present invention, Figure 1 and Figure 2As shown, a linear motor is provided, comprising a stator 200 and a mover 100 that moves linearly along a first direction relative to the stator, the mover 100 comprising a mover core 110 and a plurality of coils 130; the mover core 110 comprising a yoke 112 and a plurality of teeth 120, the plurality of teeth 120 being connected to the yoke 112 and arranged at intervals along a first direction X, each of the plurality of teeth 120 extending along a second direction Y, a wire slot being provided between two adjacent teeth of the plurality of teeth; the plurality of coils 130 being respectively sleeved on the plurality of teeth At least part of the tooth portion 120 in the portion 120; wherein, the length L1 of each tooth portion 120 in the multiple tooth portions 120 in the second direction Y is a first length, the width W1 of each tooth portion 120 in the multiple tooth portions 120 in the first direction X is a first width, the length of the coil 130 in the second direction is a second length, the sum W2 of the width of the wire slot 114 in the first direction and the first width is a second width, the first length is less than the second length, and the ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.55.

[0088] In this embodiment, if Figure 2 and Figure 3 As shown, the linear motor includes a rotor core 110, and the rotor core 110 includes a yoke 112 and a plurality of teeth 120. The plurality of teeth 120 are connected to the yoke 112 and are arranged at intervals along a first direction X. Each of the plurality of teeth 120 extends along a second direction Y. A plurality of groups of coils 130 are respectively sleeved on at least part of the plurality of teeth 120, so that the coils 130 are installed and positioned through the teeth 120. The coils 130 can generate a magnetic field after being energized, so that the stator 200 of the motor can drive the rotor 100 to move along the stator 200 through the coils 130, thereby realizing power output. The length of each tooth portion 120 in the second direction Y of the plurality of tooth portions 120 is the first length, and the length of each coil group 130 in the second direction Y of the plurality of coil groups 130 is the second length, and the second length is greater than the first length, that is, the length of the tooth portion 120 in the second direction Y is less than the length of the coil 130 in the second direction Y, so that the length of the tooth portion 120 in the second direction Y is shorter, thereby reducing the cogging force and the magnetic attraction force, improving the use efficiency of the winding, and thereby improving the thrust density of the motor. In addition, the length of the tooth portion 120 in the second direction Y is less than the length of the coil 130 in the second direction Y, and each tooth portion 120 is inserted into the mover of the coil 130, which has the characteristics of short coil 130 ends and low copper loss.

[0089] The sum of the width of the wire slot 114 in the first direction X and the first width is the second width, that is, the slot pitch of two adjacent wire slots 114 in the first direction X is the second width. By adjusting the relationship between the width of each tooth portion 120 in the first direction X and the slot pitch of two adjacent wire slots 114 in the first direction X, the thrust output by the mover can be adjusted, thereby increasing the thrust that the motor can output when the motor has certain losses. The ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.55, which effectively increases the thrust output by the mover without increasing the loss of the motor, thereby improving the overall performance of the motor.

[0090] The stator 200 is disposed at one side of the mover 100 , and can drive the mover 100 to move linearly along the first direction X, thereby achieving power output by driving the mover 100 to move linearly along the first direction X.

[0091] Furthermore, the mover 100 includes a mover core 110 and a coil 130 . The mover 100 can cooperate with the stator 200 . After the coil 130 is energized, the stator 200 can drive the mover 100 to move linearly along the first direction X.

[0092] Furthermore, the first length is proportional to the first width, which can increase the thrust of the motor output without increasing the loss of the motor, thereby improving the output capacity of the motor; and because the first length is proportional to the first width, it is also possible to reduce the loss of the motor while maintaining a certain thrust of the motor, thereby improving the efficiency of the motor.

[0093] Since the thrust of the motor can be increased and the use efficiency of the winding can be improved under certain heating conditions by setting the first length and the first width to be in direct proportion, the heat generated by the motor during operation can be reduced by setting the first length and the first width to be in direct proportion, thereby reducing the temperature rise of the motor and further improving the quality of the motor.

[0094] Furthermore, the mover 100 also includes an insulating frame and a plastic packaging material. The insulating frame is embedded in the wire slot 114 , the coil 130 is wound on the insulating frame, and the plastic packaging material is coated on the outside of the coil 130 , thereby achieving installation and positioning of the coil 130 .

[0095] The insulating frame can be an integral structure with holes, which can cover all the wire slots 114 from the tooth tip surface, thereby achieving insulation safety and low-cost manufacturing. The winding is an air-core winding, which can achieve a high full slot rate and simple and convenient installation.

[0096] The plastic encapsulation material is Bulk Molding Compound (BMC), which can achieve high thermal conductivity and rapid manufacturing.

[0097] Furthermore, the mover core 110 can be made by stamping silicon steel sheets or by processing structural steel. The mover core 110 made by processing structural steel has the advantages of low cost such as no mold and easy processing.

[0098] Specifically, the yoke 112 is arranged in a strip shape, and the plurality of teeth 120 are arranged at intervals along a first direction X, the first direction X may be the length direction of the yoke 112, and there is a gap between two adjacent teeth 120 among the plurality of teeth 120, and the plurality of groups of coils 130 are respectively sleeved on the plurality of teeth 120, and at least a portion of each group of coils 130 among the plurality of groups of coils 130 is embedded in the gap between two adjacent teeth 120.

[0099] Each of the multiple tooth portions 120 may be sleeved with a coil 130 , or one coil 130 may be sleeved with every other tooth portion 120 among the multiple tooth portions 120 .

[0100] Specifically, the second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the surface of the yoke 112 on which the teeth 120 are disposed.

[0101] This embodiment provides a linear motor 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0102] like Figure 1 and Figure 2 As shown, the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, and the ratio of the first width to the second width is greater than or equal to 0.35 and less than or equal to 0.55.

[0103] In this embodiment, when the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width is set to be greater than or equal to 0.35 and less than or equal to 0.55, which effectively improves the thrust output by the mover 100 without causing an increase in the loss of the motor, thereby improving the overall performance of the motor.

[0104] Specifically, when the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width may be 0.35.

[0105] When the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width may also be 0.38, 0.40, 0.43, 0.49, 0.5, 0.52 or 0.53.

[0106] When the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width may also be 0.55.

[0107] Further, when the length L1 of each tooth portion 120 in the second direction Y is less than the height L2 of the coil 130 in the second direction Y, the multiple tooth portions 120 are short teeth. When the length L1 of each tooth portion 120 in the second direction Y is equal to the height L2 of the coil 130 in the second direction Y, the multiple tooth portions 120 are full teeth. The ratio of the length of the short tooth in the second direction Y to the length of the full tooth in the second direction Y is the tooth length ratio, that is, the ratio of the first length to the second length is the tooth length ratio.

[0108] The ratio of the width W1 of each tooth portion 120 in the first direction X to the width of the wire slot 114 in the first direction X is the tooth width ratio, that is, the ratio of the first width to the second width is the tooth width ratio.

[0109] The thrust ratio is based on the situation when the middle teeth of the winding are the narrowest, and the thrust ratio at this time is set to 1.

[0110] like Figure 4 As shown, when the tooth length ratio is equal to 1, curve 1 is the changing relationship between the tooth width ratio and the thrust ratio.

[0111] When the tooth length ratio is equal to 0.93, curve 2 is the changing relationship between the tooth width ratio and the thrust ratio.

[0112] It can be seen from curves 1 and 2 that when the ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, the ratio of the first width to the second width is 0.4 to 0.45. Within this numerical range, the thrust output by the motor is maximized, thereby improving the performance of the motor.

[0113] This embodiment provides a linear motor 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0114] like Figure 1 and Figure 2 As shown, the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, and the ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.45.

[0115] In this embodiment, when the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width is set to be greater than or equal to 0.25 and less than or equal to 0.45, which effectively improves the thrust output by the mover 100 without causing an increase in the loss of the motor, thereby improving the overall performance of the motor.

[0116] Further, when the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width is greater than or equal to 0.3 and less than or equal to 0.45.

[0117] Specifically, when the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width may be 0.25.

[0118] When the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width may also be 0.28, 0.30, 0.33, 0.39, 0.4, 0.42 or 0.43.

[0119] When the ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, the ratio of the first width to the second width may also be 0.45.

[0120] The ratio of the width W1 of each tooth portion 120 in the first direction X to the width of the wire slot 114 in the first direction X is the tooth width ratio, that is, the ratio of the first width to the second width is the tooth width ratio.

[0121] The thrust ratio is based on the situation when the middle teeth of the winding are the narrowest, and the thrust ratio at this time is set to 1.

[0122] like Figure 4 As shown, when the tooth length ratio is equal to 0.73, curve 3 is the changing relationship between the tooth width ratio and the thrust ratio.

[0123] When the tooth length ratio is equal to 0.64, curve 4 is the changing relationship between the tooth width ratio and the thrust ratio.

[0124] When the tooth length ratio is equal to 0.47, curve 5 is the changing relationship between the tooth width ratio and the thrust ratio.

[0125] When the tooth length ratio is equal to 0.36, curve 6 is the changing relationship between the tooth width ratio and the thrust ratio.

[0126] It can be seen from curves 3, 4, 5 and 6 that when the ratio of the first length to the second length is greater than or equal to 0.3 and less than 0.8, the ratio of the first width to the second width is 0.3 to 0.35. Within this numerical range, the thrust output by the motor is maximized, thereby improving the performance of the motor.

[0127] Furthermore, if Figure 5 As shown, when the motor has smaller loss and larger thrust, the variation law of the tooth length ratio and the tooth width ratio can be divided into two approximate straight lines.

[0128] When the tooth length ratio is less than 0.8, the tooth length ratio and tooth width ratio change little, and the tooth width ratio ranges from 0.3 to 0.4.

[0129] When the tooth length ratio is greater than or equal to 0.8, the tooth length ratio and the tooth width ratio vary greatly, and the tooth width ratio ranges from 0.35 to 0.45.

[0130] Considering the magnetic saturation trend of the comprehensive tooth, when the tooth length ratio is greater than 0.1 and less than 0.8, the tooth width ratio ranges from 0.25 to 0.45; when the tooth length ratio is greater than or equal to 0.8 and less than 1, the tooth width ratio ranges from 0.35 to 0.55.

[0131] This embodiment provides a linear motor 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0132] A ratio of the first length to the second length is greater than or equal to 0.5 and less than or equal to 0.7, and a ratio of the first width to the second width is greater than or equal to 0.35 and less than or equal to 0.45.

[0133] In this embodiment, the ratio of the first length to the second length is greater than or equal to 0.5 and less than or equal to 0.7, and the ratio of the first width to the second width is set to be greater than or equal to 0.35 and less than or equal to 0.45, which further improves the thrust output by the mover without increasing the loss of the motor, thereby improving the overall performance of the motor.

[0134] This embodiment provides a linear motor 100. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0135] like Figure 1 As shown, a wire slot 114 is provided between two adjacent teeth 120 among the plurality of teeth 120 ; two adjacent groups of coils 130 among the plurality of coils 130 are located in the same wire slot 114 ; or two adjacent groups of coils 130 among the plurality of coils 130 are located in two adjacent wire slots 114 .

[0136] In this embodiment, a wire slot 114 is provided between two adjacent tooth portions 120 among the multiple tooth portions 120, and two adjacent groups of coils 130 among the multiple groups of coils 130 are located in the same wire slot 114, so that a group of coils 130 is wound around each tooth portion 120 among the multiple tooth portions 120. After the coils 130 are energized, a group of coils 130 is wound around each tooth portion 120, which can enhance the magnetic field strength generated by the coils 130, thereby further enhancing the thrust output by the mover 100.

[0137] A wire slot 114 is provided between two adjacent teeth 120 among the plurality of teeth 120, and two adjacent groups of coils 130 among the plurality of coils 130 are located in two adjacent wire slots 114, that is, one group of coils 130 is wound around each tooth 120 among the plurality of teeth 120, thereby reducing the number of coils 130 and saving the manufacturing cost of the mover 100. Furthermore, one group of coils 130 is wound around each tooth 120 among the plurality of teeth 120, thereby simplifying the winding process of the coils 130, reducing the difficulty of winding the coils 130, and thereby improving the production efficiency of the mover 100.

[0138] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0139] like Figure 2 and Figure 3 As shown, the multiple tooth portions 120 include at least two first teeth 122 and multiple second teeth 124; the at least two first teeth 122 are respectively arranged at the two ends of the yoke 112; the multiple second teeth 124 are arranged between the at least two first teeth 122; the first length of the first tooth 122 is less than the first length of the second tooth 124.

[0140] In this embodiment, the multiple tooth portions 120 include at least two first teeth 122 and multiple second teeth 124. The at least two first teeth 122 are respectively arranged at the two ends of the yoke 112, and the multiple second teeth 124 are arranged between the at least two first teeth 122. The first length of the first tooth 122 is smaller than the first length of the second tooth 124. The two first teeth 122 located at the two ends of the yoke 112 can reduce the motor cogging force and improve the stability of the motor during movement.

[0141] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0142] The plurality of coil groups 130 are respectively sleeved on the plurality of second teeth 124 , and two adjacent coil groups 130 among the plurality of coil groups 130 are located in the same wire slot 114 .

[0143] In this embodiment, multiple groups of coils 130 are respectively mounted on multiple second teeth 124. After the coils 130 are energized, a group of coils 130 is wound around each second tooth 124, which can enhance the magnetic field strength generated by the coils 130 and further enhance the thrust output by the mover 100.

[0144] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0145] like Fig. 9 and Fig.10As shown, the plurality of tooth portions 120 include a plurality of winding teeth 128 and non-winding teeth 126 that are alternately arranged, and the plurality of coils 130 are respectively sleeved on the plurality of winding teeth 128 .

[0146] In this embodiment, the multiple teeth 120 include multiple winding teeth 128 and non-winding teeth 126 arranged alternately, and the multiple groups of coils 130 are respectively sleeved on the multiple winding teeth 128, that is, one group of coils 130 is wound around each tooth 120 in the multiple teeth 120, thereby reducing the number of coils 130 and saving the manufacturing cost of the mover. In addition, the multiple groups of coils 130 are respectively sleeved on the multiple winding teeth 128, which simplifies the winding process of the coils 130, reduces the difficulty of winding the coils 130, and thus improves the production efficiency of the mover 100.

[0147] Furthermore, the multiple tooth portions 120 also include two first teeth 122, which are respectively located at the two ends of the multiple winding teeth 128 and the non-winding teeth 126. The two first teeth 122 can reduce the cogging force of the motor and further improve the stability of the motor during operation.

[0148] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0149] like Figure 7 and Figure 8 As shown, each of the plurality of coil groups 130 includes a first coil segment 132 and a second coil segment 134. The first coil segment 132 is sleeved on the tooth portion 120 and located in the wire slot 114; the second coil segment 134 is connected to the first coil segment 132 and extends between the tooth portion 120 and the stator 200.

[0150] In this embodiment, the first coil segment 132 is sleeved on the tooth portion 120 to achieve the installation and positioning of the coil 130. The second coil segment 134 is connected to the first coil segment 132 and extends between the tooth portion 120 and the stator 200, effectively utilizing the space between the tooth portion 120 and the stator 200, thereby improving the utilization rate of the internal space of the motor. In addition, the second coil segment extends between the tooth portion 120 and the stator 200, increasing the area of ​​the coil 130, thereby increasing the coil 130 with high magnetic flux density, and further improving the thrust that the motor can output. The second coil segment extends between the tooth portion 120 and the stator 200, which can also make the structure of the motor more compact, while increasing the thrust output by the motor, reducing the volume of the motor, thereby reducing the space occupied by the motor.

[0151] Specifically, a portion of the coil 130 protrudes into between the second tooth 124 and the stator 200 , but a height L2 of the coil 130 in the second direction Y remains unchanged, that is, the coil 130 enters between the stator 200 and the second tooth 124 along the first direction X.

[0152] Furthermore, the coil 130 enters between the second tooth 124 where the coil 130 is to be provided and the stator 200 .

[0153] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0154] The width of the second coil segment 134 in the first direction is greater than the width of the first coil segment 132 in the first direction, and the second coil segments 134 of two adjacent groups of coils 130 are insulated.

[0155] In this embodiment, the width of the second coil segment 134 in the first direction is greater than the width of the first coil segment 132 in the first direction, so that the coil 130 can extend to the space between the tooth portion 120 and the stator 200 on both sides in the first direction, further increasing the area of ​​the coil 130, increasing the coil 130 with high magnetic flux density, and further improving the thrust that the motor can output.

[0156] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0157] like Fig.11 and Fig.12 As shown, the plurality of coils 130 extend between the plurality of winding teeth 128 and the stator 200 .

[0158] In this embodiment, multiple sets of coils 130 extend between multiple winding teeth 128 and the stator 200, effectively utilizing the space between the winding teeth 128 and the stator 200, thereby improving the utilization rate of the internal space of the motor. In addition, multiple sets of coils 130 extend between multiple winding teeth 128 and the stator 200, increasing the area of ​​the coils 130, thereby increasing the coils 130 with high magnetic flux density, and further improving the thrust that the motor can output.

[0159] Specifically, a portion of the coil 130 protrudes into between the winding teeth 128 and the stator 200 , but the height L2 of the coil 130 in the second direction Y remains unchanged, that is, the coil 130 enters between the stator 200 and the winding teeth 128 along the first direction X.

[0160] Furthermore, the coil 130 enters between the winding tooth 128 on which the coil 130 is mounted and the stator 200 .

[0161] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0162] like Fig.11 and Fig.12 As shown, the plurality of coils 130 extend between the plurality of non-winding teeth 126 and the stator 200 .

[0163] In this embodiment, multiple sets of coils 130 extend between multiple non-winding teeth 126 and stator 200, effectively utilizing the space between non-winding teeth 126 and stator 200, thereby improving the utilization rate of the internal space of the motor. In addition, multiple sets of coils 130 extend between multiple non-winding teeth 126 and stator 200, increasing the area of ​​coils 130, thereby increasing the number of coils 130 with high magnetic flux density, and further improving the thrust that the motor can output.

[0164] Specifically, a portion of the coil 130 protrudes into between the non-winding tooth 126 and the stator 200 , but the height L2 of the coil 130 in the second direction Y remains unchanged, that is, the coil 130 enters between the stator 200 and the non-winding tooth 126 along the first direction X.

[0165] Furthermore, the coil 130 enters between the non-winding tooth 126 adjacent to the coil 130 and the stator 200 .

[0166] Furthermore, the coil 130 may extend into the space between the non-winding teeth 126 and the stator 200 and the space between the winding teeth 128 and the stator 200 at the same time.

[0167] This embodiment provides a linear motor. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features.

[0168] like Figure 6 As shown, the stator 200 includes a body 210 and a plurality of magnetic members 220 . The plurality of magnetic members 220 are disposed on the body 210 , arranged along a first direction X, and opposite to the plurality of coil groups 130 .

[0169] In this embodiment, the stator 200 includes a body 210 and a plurality of magnetic members 220, and the plurality of magnetic members 220 are disposed on the body 210, and the magnetic members 220 are positioned by the body 210. The plurality of magnetic members 220 are arranged along the first direction X, opposite to the plurality of coils 130, and the plurality of magnetic members 220 can generate a magnetic field, and after the coils 130 of the mover 100 are energized, a magnetic field can also be generated around the coils 130. When the motor is working, the stator 200 is fixed, and after the coils 130 are energized, the magnetic field generated by the coils 130 interacts with the magnetic field generated by the magnetic members 220, and the mover 100 is driven to move along the first direction X by the stator 200, and the motor outputs power.

[0170] Furthermore, the magnetic member 220 is bonded to the body 210 .

[0171] The mover 100 of the motor is supported by a support mechanism such as a linear guide rail, and moves linearly along the stator 200 .

[0172] In the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limiting the present invention; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0173] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" 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 invention. In the claims, specification and drawings of the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0174] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A linear motor, characterized in that: The invention comprises a stator and a mover which moves linearly along a first direction relative to the stator, wherein the mover comprises: A movable core, the movable core comprising a yoke and a plurality of teeth, the plurality of teeth being connected to the yoke and spaced apart along a first direction, each of the plurality of teeth extending along a second direction, and a wire slot being provided between two adjacent teeth of the plurality of teeth; A plurality of groups of coils, wherein the plurality of groups of coils are respectively sleeved on at least some of the plurality of teeth; Among them, the length of each tooth portion among the multiple teeth in the second direction is the first length, the width of each tooth portion among the multiple teeth in the first direction is the first width, the length of the coil in the second direction is the second length, the sum of the width of the wire slot in the first direction and the first width is the second width, the first length is less than the second length, and the ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.

55.

2. The linear motor according to claim 1, characterized in that: A ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, and a ratio of the first width to the second width is greater than or equal to 0.35 and less than or equal to 0.

55.

3. The linear motor according to claim 1, characterized in that: A ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, and a ratio of the first width to the second width is greater than or equal to 0.25 and less than or equal to 0.

45.

4. The linear motor according to claim 3, characterized in that: A ratio of the first length to the second length is greater than or equal to 0.5 and less than or equal to 0.7, and a ratio of the first width to the second width is greater than or equal to 0.35 and less than or equal to 0.

45.

5. The linear motor according to claim 1, characterized in that: The plurality of teeth include: at least two first teeth, the at least two first teeth being respectively arranged at two ends of the yoke; a plurality of second teeth, the plurality of second teeth being arranged between the at least two first teeth; The first length of the first tooth is smaller than the first length of the second tooth.

6. The linear motor according to claim 5, characterized in that: The plurality of groups of coils are respectively sleeved on the plurality of second teeth, and two adjacent groups of coils among the plurality of groups of coils are located in the same wire slot.

7. The linear motor according to claim 5, characterized in that: The plurality of tooth portions include: a plurality of winding teeth and non-winding teeth that are alternately arranged, and the plurality of groups of coils are respectively sleeved on the plurality of winding teeth.

8. The linear motor according to any one of claims 1 to 7, characterized in that: Each of the plurality of coils comprises: a first coil segment, wherein the first coil segment is sleeved on the tooth portion and located in the wire slot; A second coil segment is connected to the first coil segment and extends between the tooth portion and the stator.

9. The linear motor according to claim 8, characterized in that: The width of the second coil segment in the first direction is greater than the width of the first coil segment in the first direction, and the second coil segments of two adjacent groups of coils are insulated.

10. The linear motor according to any one of claims 1 to 7, characterized in that: The stator comprises: ontology; A plurality of magnetic members are disposed on the body, arranged along the first direction, and opposite to the plurality of coils.

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