CN220544847U

CN220544847U - Linear motor

Info

Publication number: CN220544847U
Application number: CN202322218122.5U
Authority: CN
Inventors: 唐玉琪
Original assignee: Dorna Technology Co ltd; Servotronix Motion Control Shenzhen Co ltd; Guangdong Midea Intelligent Technologies Co Ltd
Current assignee: Dorna Technology Co ltd; Servotronix Motion Control Shenzhen Co ltd; Guangdong Midea Intelligent Technologies Co Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-02-27
Anticipated expiration: 2033-08-17

Abstract

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

Description

Linear motor

Technical Field

The utility model relates to the technical field of linear motors, in particular to a linear motor.

Background

At present, the linear motor comprises a stator and a rotor, wherein the stator can drive the rotor to move linearly, and then power output is realized.

In the related art, the large thrust winding of the linear motor with the iron core has high service efficiency, but the cogging force and the magnetic attraction force are large.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, a first aspect of the utility model proposes a linear motor.

In view of this, a first aspect of the present utility model provides a linear motor including a stator and a mover linearly moving in a first direction with respect to the stator, the mover including a mover core and a plurality of sets of coils; the rotor core comprises a yoke part and a plurality of tooth parts, the tooth parts are connected with the yoke part and are arranged at intervals along a first direction, each tooth part in the tooth parts extends along a second direction, and a wire slot is arranged between two adjacent tooth parts in the tooth parts; the plurality of groups of coils are respectively sleeved on at least part of the tooth parts; 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 groove in the first direction and the first width is a second width, the first length is smaller than the second length, and the ratio of the first width to the second width is greater than or equal to 0.25 and smaller than or equal to 0.55.

The linear motor comprises a rotor core, wherein the rotor core comprises a yoke part and a plurality of tooth parts, the tooth parts are connected with the yoke part and are arranged at intervals along a first direction, each tooth part in the tooth parts extends along a second direction, and a plurality of groups of coils are respectively sleeved on at least part of the tooth parts in the tooth parts so as to realize the installation and positioning of the coils through the tooth parts; after the coil is electrified, a magnetic field can be generated, so that the stator of the motor can drive the rotor to move along the stator through the coil, and the output of power is realized. The length of each tooth part in the plurality of tooth parts in the second direction is the first length, the length of each group of coils in the plurality of groups of coils in the second direction is the second length, the second length is greater than the first length, namely the length of the tooth part in the second direction is less than the length of the coils in the second direction, the length of the tooth part in the second direction is shorter, tooth socket force and magnetic attraction force are further reduced, meanwhile, the use efficiency of the winding is improved, and the thrust density of the motor is further improved. And the length of the tooth part in the second direction is smaller than that of the coil in the second direction, and each tooth part is inserted into the rotor of the coil, so that the coil has the characteristics of short coil end and low copper loss.

The sum of the width of the wire grooves in the first direction and the first width is the second width, namely the groove distance between two adjacent wire grooves in the first direction is the second width, and the thrust output by the rotor can be adjusted by adjusting the relation between the width of each tooth part in the plurality of tooth parts in the first direction and the groove distance between two adjacent wire grooves in the first direction, so that the thrust output by the motor can be improved under the condition that the motor has certain loss. The ratio of the first width to the second width is more than or equal to 0.25 and less than or equal to 0.55, so that the thrust output by the rotor is effectively improved, the loss increase of the motor is avoided, and the overall performance of the motor is improved.

The stator is arranged on one side of the rotor core, can drive the rotor core to linearly move along the first direction, and further realize power output by driving the rotor core to linearly move along the first direction.

Further, the first length is in direct proportion to the first width, so that the thrust output by the motor can be improved under the condition that the loss of the motor is not increased, and the output capacity of the motor is further improved; and because the first length is directly proportional with first width, can also reduce the loss of motor under the circumstances of the thrust of certain motor, and then promote the efficiency of motor.

Because the thrust of the motor can be increased under the condition that the motor generates heat to improve the service efficiency of the winding through setting the first length and the first width to be in a proportional relation, the heat productivity of the motor during operation can be reduced through setting the first length and the first width to be in a proportional relation, the temperature rise of the motor is further reduced, and the quality of the motor is further improved.

Further, the rotor further comprises 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 outside the coil, so that the coil is installed and positioned.

The insulating frame can be an integrated structure with holes and can cover all the wire slots from the end surfaces of the tooth tips, so that the insulating frame is safe in insulation and low in cost. The windings are hollow windings, so that high full slot rate can be realized, and the installation is simple and convenient.

The plastic package material is bulk molding compound (Bulk Molding Compound, BMC) which can realize high heat conduction and rapid manufacturing.

Further, the rotor core can be made of silicon steel sheets through stamping or structural steel through machining. The mover iron core manufactured by processing the structural steel has the advantages of no need of a die, easiness in processing and the like and is low in cost.

Specifically, the yoke portion is arranged in a strip shape, the plurality of tooth portions are arranged at intervals along a first direction, the first direction can be the length direction of the yoke portion, gaps are reserved between two adjacent tooth portions in the plurality of tooth portions, the plurality of groups of coils are respectively sleeved on the plurality of tooth portions, and at least part of each group of coils in the plurality of groups of coils is embedded in the gaps between the two adjacent tooth portions.

Each of the plurality of teeth can be sleeved with a coil, or one coil can be sleeved on each of the plurality of teeth at intervals.

Specifically, the second direction is perpendicular to the first direction, and the second direction is perpendicular to the surface of the yoke on which the teeth are provided.

In addition, the mover in the technical scheme provided by the utility model can also have the following additional technical characteristics:

in one aspect of the present utility model, optionally, 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.

In the technical scheme, under the condition that the ratio of the first length to the second length is greater than or equal to 0.8 and smaller than 1, the ratio of the first width to the second width is set to be greater than or equal to 0.35 and smaller than or equal to 0.55, so that the thrust of rotor output is effectively improved, loss increase of a motor is avoided, and the overall performance of the motor is improved.

Specifically, in the case where 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.

In the case that 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.

In the case that 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.

Further, when the length of each of the plurality of teeth in the second direction is smaller than the length of the coil in the second direction, the plurality of teeth are short teeth. When the length of each of the plurality of teeth in the second direction is equal to the length of the coil in the second direction, the plurality of teeth 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, i.e. the ratio of the first length to the second length is the tooth length ratio.

The ratio of the width of each tooth in the first direction to the slot pitch of the slot in the first direction is the tooth width ratio, i.e., the ratio of the first width to the second width is the tooth width ratio.

The thrust ratio is based on the narrowest winding middle tooth, and the thrust ratio at this time is set to 1.

When the tooth length ratio is equal to 1, the curve 1 is the variation relationship between the tooth width ratio and the thrust force ratio.

Curve 2 is the variation between the tooth width ratio and the thrust ratio when the tooth length ratio is equal to 0.93.

In the case where the ratio of the first length to the second length is 0.8 or more and less than 1, the ratio of the first width to the second width is 0.4 to 0.45. Within the numerical range, the thrust which can be output by the motor is maximized, so that the performance of the motor can be improved.

In one aspect of the present utility model, optionally, 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.

In the technical scheme, under the condition that 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, so that the thrust of rotor output is effectively improved, loss increase of a motor is avoided, and the overall performance of the motor is improved.

Further, in the case that 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.

Specifically, in the case that 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.

In the case that 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.

In the case that 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.

Curve 3 is the variation between the tooth width ratio and the thrust ratio when the tooth length ratio is equal to 0.73.

Curve 4 is the variation between the tooth width ratio and the thrust ratio when the tooth length ratio is equal to 0.64.

Curve 5 is the variation between the tooth width ratio and the thrust ratio when the tooth length ratio is equal to 0.47.

Curve 6 is the variation between the tooth width ratio and the thrust ratio when the tooth length ratio is equal to 0.36.

As can be seen from the curves 3, 4, 5 and 6, in the case where the ratio of the first length to the second length is 0.3 or more and less than 0.8, the ratio of the first width to the second width is 0.3 to 0.35. Within the numerical range, the thrust which can be output by the motor is maximized, so that the performance of the motor can be improved.

Further, the motor has smaller loss, and under the condition that the motor has larger thrust, the change rule of the tooth length ratio and the tooth width ratio can be divided into two sections of approximate straight lines.

In the case where the tooth length ratio is smaller than 0.8, the change in the tooth length ratio and the tooth width ratio is small, and the tooth width ratio ranges from 0.3 to 0.4.

In the case where the ratio of tooth length is 0.8 or more, the ratio of tooth length to tooth width varies greatly, and the ratio of tooth width ranges from 0.35 to 0.45.

Combining the magnetic saturation trend of the teeth, and under the condition that the tooth length ratio is more than 0.1 and less than 0.8, the range of the tooth width ratio is 0.25 to 0.45; in the case where the tooth length ratio is 0.8 or more and less than 1, the tooth width ratio is in the range of 0.35 to 0.55.

In one aspect of the present utility model, optionally, 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.

In the technical scheme, the ratio of the first length to the second length is more than or equal to 0.5 and less than or equal to 0.7, the ratio of the first width to the second width is set to be more than or equal to 0.35 and less than or equal to 0.45, the thrust of rotor output is further improved, the loss increase of the motor is avoided, and the overall performance of the motor is further improved.

In one aspect of the present utility model, optionally, the plurality of teeth includes at least two first teeth and a plurality of second teeth; at least two first teeth are respectively arranged at two ends of the yoke part; a plurality of second teeth are disposed between at least two first teeth; the first length of the first tooth is less than the first length of the second tooth.

In this technical scheme, a plurality of tooth portions include two at least first teeth and a plurality of second tooth, and two at least first teeth are arranged respectively in the both ends of yoke portion, and a plurality of second teeth are arranged between two at least first teeth, and the first length of first tooth is less than the first length of second tooth, and two at least first teeth that are located the yoke portion both ends can reduce the tooth's socket force of motor, promotes the stability of motor in the motion process.

In one technical scheme of the utility model, optionally, a plurality of groups of coils are respectively sleeved on the plurality of second teeth, and two adjacent groups of coils in the plurality of groups of coils are positioned in the same wire slot.

In the technical scheme, a plurality of groups of coils are respectively sleeved on a plurality of second teeth, and after the coils are electrified, a group of coils are wound on each second tooth, so that the magnetic field intensity generated by the coils can be improved, and the thrust output by the rotor is further improved.

In one aspect of the present utility model, optionally, the plurality of teeth includes 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.

In the technical scheme, the plurality of tooth parts comprise a plurality of winding teeth and non-winding teeth which are alternately arranged, the plurality of winding teeth are respectively sleeved with the plurality of coils, namely, one group of coils is wound on each tooth part in the plurality of tooth parts at intervals, so that the number of coils is reduced, and the manufacturing cost of the rotor is saved. And the plurality of groups of coils are respectively sleeved on the plurality of winding teeth, so that the winding process of the coils is simplified, the winding difficulty of the coils is reduced, and the production efficiency of the rotor is further improved.

Further, the plurality of tooth portions still include two first teeth, and two first teeth are located the both ends of a plurality of wire winding teeth and non-wire winding teeth respectively, and two first teeth can reduce the tooth's socket force of motor, further promotes the stability in the motor working process.

In one aspect of the utility model, optionally, each set of coils in the plurality of sets of coils comprises a first coil section and a second coil section. The first coil section is sleeved on the tooth part and is positioned in the wire slot; the second coil section is connected with the first coil section and extends between the tooth part and the stator.

In the technical scheme, the first coil section is sleeved on the tooth part, so that the coil is installed and positioned.

The second coil section is connected with the first coil section, extends to between tooth portion and the stator, has utilized the space between tooth portion and the stator effectively, and then promotes the utilization ratio of motor inner space. And the second coil section extends to between the tooth part and the stator, so that the area of the coil is increased, the coil with high magnetic flux density is further increased, and the thrust which can be output by the motor is further improved. The second coil section extends to between the tooth part and the stator, so that the motor is more compact in structure, the volume of the motor is reduced while the thrust output by the motor is improved, and the occupation of the motor to space is further reduced.

In particular, a portion of the coil protrudes between the second tooth and the stator, but the length of the coil in the second direction remains unchanged, i.e. the coil enters between the stator and the second tooth in the first direction.

Further, the coil enters between the second tooth provided with the coil and the stator.

In one aspect of the present utility model, optionally, the width of the second coil section in the first direction is larger than the width of the first coil section in the first direction, and the second coil sections of the adjacent two sets of coils are arranged in an insulating manner.

In this technical scheme, the width of second coil section in first direction is greater than the width of first coil section in first direction for the coil can all extend to the space between tooth portion and the stator in first direction both sides, has further increased the area of coil, has increased the coil of high magnetic flux density, has further promoted the thrust that the motor can export.

In one aspect of the present utility model, optionally, the stator includes a body and a plurality of magnetic members disposed on the body, and disposed along the first direction opposite to the plurality of sets of coils.

In this technical scheme, the stator includes body and a plurality of magnetic part, and a plurality of magnetic part set up in the body, and then fix a position the magnetic part through the body. The plurality of magnetic members are arranged along the first direction, and are opposite to the plurality of groups of coils, the plurality of magnetic members can generate magnetic fields, and after the coils of the mover are electrified, the magnetic fields can also be generated around the coils. When the motor works, the stator is fixed, after the coil is electrified, the magnetic field generated by the coil interacts with the magnetic field generated by the magnetic piece, so that the rotor is driven to move along the first direction through the stator, and the motor realizes the output of power.

Further, the magnetic member is bonded to the body.

The mover of the motor is supported by a supporting mechanism such as a linear guide rail and moves linearly along the stator.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic structural view of a mover according to an embodiment of the present utility model;

fig. 2 is one of schematic structural views of an electric motor according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of the motor along A-A shown in FIG. 2 according to one embodiment of the utility model;

FIG. 4 is a schematic diagram of the relationship between thrust ratio and tooth width ratio of a motor according to one embodiment of the utility model;

FIG. 5 is a schematic illustration of the relationship between the aspect ratio and the tooth length ratio of an electric machine according to one embodiment of the utility model;

FIG. 6 is a cross-sectional view of the motor shown in FIG. 2 along B-B in accordance with one embodiment of the present utility model;

FIG. 7 is a second schematic diagram of an electric machine according to an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of the motor shown in FIG. 7 along C-C in accordance with one embodiment of the present utility model;

FIG. 9 is a third schematic diagram of an electric machine according to an embodiment of the present utility model;

FIG. 10 is a cross-sectional view of the motor shown in FIG. 9 along D-D according to one embodiment of the utility model;

FIG. 11 is a schematic diagram of a motor according to one embodiment of the utility model;

fig. 12 is a cross-sectional view of the motor shown in fig. 11 along E-E according to one embodiment of the utility model.

Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 12 is:

100 rotor, 110 rotor core, 112 yoke, 114 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 piece.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

A linear motor according to some embodiments of the present utility model is described below with reference to fig. 1 to 12.

In one embodiment of the present utility model, as shown in fig. 1 and 2, there is provided a linear motor including a stator 200 and a mover 100 linearly moving in a first direction with respect to the stator, the mover 100 including a mover core 110 and a plurality of sets of coils 130; the mover 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, and a wire slot is provided between two adjacent teeth of the plurality of teeth; the plurality of groups of coils 130 are respectively sleeved on at least part of the teeth 120 in the plurality of teeth 120; the length L1 of each of the plurality of teeth 120 in the second direction Y is a first length, the width W1 of each of the plurality of teeth 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 groove 114 in the first direction and the first width is a second width, the first length is smaller 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.

In this embodiment, as shown in fig. 2 and 3, the linear motor includes a mover core 110, the mover 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, and a plurality of groups of coils 130 are respectively sleeved on at least part of the teeth 120 in the plurality of teeth 120, so as to mount and position the coils 130 through the teeth 120; after the coil 130 is electrified, a magnetic field can be generated, so that the stator 200 of the motor can drive the rotor 100 to move along the stator 200 through the coil 130, and power output is realized. The length of each tooth 120 in the plurality of teeth 120 in the second direction Y is a first length, the length of each group of coils 130 in the plurality of groups of coils 130 in the second direction Y is a second length, the second length is greater than the first length, that is, the length of each tooth 120 in the second direction Y is less than the length of each coil 130 in the second direction Y, so that the length of each tooth 120 in the second direction Y is shorter, cogging force and magnetic attraction force are further reduced, winding use efficiency is improved, and thrust density of the motor is further improved. And the length of the teeth 120 in the second direction Y is smaller than the length of the coil 130 in the second direction Y, and each tooth 120 is inserted into the mover of the coil 130, and has the characteristics of short end of the coil 130 and low copper loss.

The sum of the width of the wire grooves 114 in the first direction X and the first width is a second width, that is, the groove distance between two adjacent wire grooves 114 in the first direction X is a second width, and the thrust output by the mover can be adjusted by adjusting the relation between the width of each tooth 120 of the plurality of teeth 120 in the first direction X and the groove distance between two adjacent wire grooves 114 in the first direction X, so that the thrust output by the motor can be improved under the condition that the motor has a certain loss. The ratio of the first width to the second width is more than or equal to 0.25 and less than or equal to 0.55, so that the thrust output by the rotor is effectively improved, the loss increase of the motor is avoided, and the overall performance of the motor is improved.

The stator 200 is disposed at one side of the mover 100, and is capable of driving the mover 100 to linearly move in the first direction X, and further, outputting power by driving the mover 100 to linearly move in the first direction X.

Further, the mover 100 includes a mover core 110 and a coil 130, the mover 100 can be mated with the stator 200, and the stator 200 can drive the mover 100 to linearly move along the first direction X after the coil 130 is energized.

Further, the mover 100 further includes an insulation frame and a plastic sealing material, the insulation frame is embedded in the wire slot 114, the coil 130 is wound on the insulation frame, and the plastic sealing material is coated outside the coil 130, so as to mount and position the coil 130.

The insulating frame may be a perforated unitary structure that covers all of the wire slots 114 from the tip end face, thereby providing for safe and low cost manufacture of the insulation. The windings are hollow windings, so that high full slot rate can be realized, and the installation is simple and convenient.

Further, the mover core 110 may be formed by punching a silicon steel sheet or by processing a structural steel. The mover core 110 manufactured by processing the structural steel has the advantages of no need of a die, easy processing and the like.

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

Each of the plurality of teeth 120 may be sleeved with a coil 130, or each of the plurality of teeth 120 may be sleeved with a coil 130 every other one of the plurality of teeth 120.

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 provided.

The present embodiment provides a linear motor 100, which further includes the following technical features in addition to the technical features of the above-described embodiment.

As shown in fig. 1 and 2, 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.

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, so that the thrust output by the mover 100 is effectively improved, the loss of the motor is not increased, and the overall performance of the motor is further improved.

Further, when the length L1 of each of the plurality of teeth 120 in the second direction Y is smaller than the height L2 of the coil 130 in the second direction Y, the plurality of teeth 120 are short teeth. When the length L1 of each of the plurality of teeth 120 in the second direction Y is equal to the height L2 of the coil 130 in the second direction Y, the plurality of teeth 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, i.e. the ratio of the first length to the second length is the tooth length ratio.

The ratio of the width W1 of each tooth 120 of the plurality of teeth 120 in the first direction X to the width of the wire slot 114 in the first direction X is a tooth width ratio, i.e., the ratio of the first width to the second width is a tooth width ratio.

As shown in fig. 4, when the tooth length ratio is equal to 1, the curve 1 is the variation relationship between the tooth width ratio and the thrust force ratio.

As can be seen from the curves 1 and 2, in the case where the ratio of the first length to the second length is 0.8 or more and less than 1, the ratio of the first width to the second width is 0.4 to 0.45. Within the numerical range, the thrust which can be output by the motor is maximized, so that the performance of the motor can be improved.

As shown in fig. 1 and 2, 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.

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, so that the thrust output by the mover 100 is effectively improved, the loss of the motor is not increased, and the overall performance of the motor is further improved.

As shown in fig. 4, when the tooth length ratio is equal to 0.73, the curve 3 is the variation relationship between the tooth width ratio and the thrust force ratio.

Further, as shown in fig. 5, in the case that the motor has a small loss and the motor has a large thrust, the change rule of the tooth length ratio and the tooth width ratio may be divided into two sections of approximate straight lines.

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.

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, so that the thrust output by the rotor is further improved, the loss of the motor is not increased, and the overall performance of the motor is further improved.

As shown in fig. 1, a wire groove 114 is provided between two adjacent teeth 120 of the plurality of teeth 120; two adjacent coils 130 of the plurality of coils 130 are positioned in the same wire slot 114; or two adjacent sets of coils 130 of the plurality of sets of coils 130 are positioned within two adjacent wire slots 114.

In this embodiment, a wire slot 114 is disposed between two adjacent teeth 120 in the plurality of teeth 120, and two adjacent coils 130 in the plurality of coils 130 are located in the same wire slot 114, so that a set of coils 130 is wound on each tooth 120 in the plurality of teeth 120, and after the coils 130 are electrified, a set of coils 130 is wound on each tooth 120, so that the magnetic field strength generated by the coils 130 can be improved, and the thrust output by the mover 100 is further improved.

The wire slots 114 are arranged between two adjacent tooth parts 120 in the tooth parts 120, two adjacent coil 130 in the coil 130 are positioned in the two adjacent wire slots 114, namely, one coil 130 is wound around each tooth part 120 in the tooth parts 120, so that the number of the coil 130 is reduced, and the manufacturing cost of the rotor 100 is saved. And a group of coils 130 are wound on each tooth 120 of the plurality of teeth 120, so that the winding process of the coils 130 is simplified, the winding difficulty of the coils 130 is reduced, and the production efficiency of the rotor 100 is further improved.

The present embodiment provides a linear motor, which further includes the following technical features in addition to the technical features of the above embodiments.

As shown in fig. 2 and 3, the plurality of teeth 120 includes at least two first teeth 122 and a plurality of second teeth 124; at least two first teeth 122 are respectively arranged at both ends of the yoke 112; a plurality of second teeth 124 are disposed between at least two first teeth 122; the first length of the first teeth 122 is less than the first length of the second teeth 124.

In this embodiment, the plurality of teeth 120 includes at least two first teeth 122 and a plurality of second teeth 124, the at least two first teeth 122 are respectively disposed at two ends of the yoke 112, the plurality of second teeth 124 are disposed between the at least two first teeth 122, the first length of the first teeth 122 is smaller than the first length of the second teeth 124, the two first teeth 122 disposed at two ends of the yoke 112 can reduce the cogging force of the motor, and the stability of the motor during the movement process is improved.

The plurality of coils 130 are respectively sleeved on the plurality of second teeth 124, and two adjacent coils 130 in the plurality of coils 130 are located in the same wire slot 114.

In this embodiment, the plurality of sets of coils 130 are respectively sleeved on the plurality of second teeth 124, and after the coils 130 are energized, a set of coils 130 is wound on each second tooth 124 to increase the magnetic field strength generated by the coils 130, so as to further increase the thrust output by the mover 100.

As shown in fig. 9 and 10, the plurality of teeth 120 includes a plurality of winding teeth 128 and non-winding teeth 126 alternately arranged, and the plurality of groups of coils 130 are respectively sleeved on the plurality of winding teeth 128.

In this embodiment, the plurality of teeth 120 includes a plurality of winding teeth 128 and non-winding teeth 126 that are alternately arranged, and the plurality of groups of coils 130 are respectively sleeved on the plurality of winding teeth 128, that is, a group of coils 130 is wound on each of the plurality of teeth 120 at intervals, so that the number of coils 130 is reduced, and the manufacturing cost of the mover is saved. And the plurality of groups of coils 130 are respectively sleeved on the plurality of winding teeth 128, so that the winding process of the coils 130 is simplified, the winding difficulty of the coils 130 is reduced, and the production efficiency of the rotor 100 is further improved.

Further, the plurality of teeth 120 further includes two first teeth 122, the two first teeth 122 are located at two ends of the plurality of winding teeth 128 and the non-winding teeth 126, respectively, and the two first teeth 122 can reduce a cogging force of the motor, so as to further improve stability of the motor in a working process.

As shown in fig. 7 and 8, each set of coils 130 of the plurality of sets of coils 130 includes a first coil segment 132 and a second coil segment 134. The first coil section 132 is sleeved on the tooth 120 and is located in the wire slot 114; the second coil segment 134 is connected to the first coil segment 132 and extends between the teeth 120 and the stator 200.

In this embodiment, the first coil segment 132 is sleeved on the tooth 120 to mount and position the coil 130. The second coil segment 134 is connected with the first coil segment 132 and extends between the tooth 120 and the stator 200, so that the space between the tooth 120 and the stator 200 is effectively utilized, and the utilization rate of the internal space of the motor is improved. And the second coil segment extends between the tooth 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 120 and the stator 200, so that the motor can be more compact in structure, the volume of the motor is reduced while the thrust output by the motor is improved, and the occupation of the motor to the space is reduced.

Specifically, a portion of the coil 130 protrudes between the second tooth 124 and the stator 200, but the height L2 of the coil 130 in the second direction Y remains unchanged, i.e., the coil 130 enters between the stator 200 and the second tooth 124 in the first direction X.

Further, the coil 130 enters between the second tooth 124 where the coil 130 is to be provided and the stator 200.

The width of the second coil sections 134 in the first direction is larger than the width of the first coil sections 132 in the first direction, and the second coil sections 134 of the adjacent two sets of coils 130 are arranged in an insulated manner.

In this embodiment, the width of the second coil section 134 in the first direction is greater than the width of the first coil section 132 in the first direction, so that the coil 130 can extend to the space between the teeth 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.

As shown in fig. 11 and 12, the plurality of sets of coils 130 extend between the plurality of wire-wound teeth 128 and the stator 200.

In this embodiment, the plurality of coils 130 extend between the plurality of winding teeth 128 and the stator 200, so that the space between the winding teeth 128 and the stator 200 is effectively utilized, and the utilization of the internal space of the motor is improved. And the plurality of groups of coils 130 extend between the plurality of winding teeth 128 and the stator 200, so that the area of the coils 130 is increased, the coils 130 with high magnetic flux density are further increased, and the thrust which can be output by the motor is further improved.

Specifically, a portion of the coil 130 protrudes between the wire winding teeth 128 and the stator 200, but the height L2 of the coil 130 in the second direction Y remains unchanged, i.e., the coil 130 enters between the stator 200 and the wire winding teeth 128 in the first direction X.

Further, the coil 130 enters between the winding teeth 128 around which the coil 130 is fitted and the stator 200.

As shown in fig. 11 and 12, the plurality of sets of coils 130 extend between the plurality of non-wound teeth 126 and the stator 200.

In this embodiment, the plurality of coils 130 extend between the plurality of non-winding teeth 126 and the stator 200, so that the space between the non-winding teeth 126 and the stator 200 is effectively utilized, and the utilization of the internal space of the motor is improved. And the plurality of groups of coils 130 extend between the plurality of non-winding teeth 126 and the stator 200, so that the area of the coils 130 is increased, the coils 130 with high magnetic flux density are further increased, and the thrust which can be output by the motor is further improved.

Specifically, a portion of the coil 130 protrudes between the non-winding teeth 126 and the stator 200, but the height L2 of the coil 130 in the second direction Y remains unchanged, i.e., the coil 130 enters between the stator 200 and the non-winding teeth 126 in the first direction X.

Further, the coil 130 enters between the non-wound teeth 126 adjacent to the coil 130 and the stator 200.

Further, the coil 130 may extend into the space between the non-wire-wound teeth 126 and the stator 200 and the space between the wire-wound teeth 128 and the stator 200 at the same time.

As shown in fig. 6, 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 along a first direction X, opposite to the plurality of sets of coils 130.

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, so that 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 sets of coils 130, and the plurality of magnetic members 220 are capable of generating a magnetic field, and also capable of generating a magnetic field around the coils 130 of the mover 100 after the coils 130 are energized. When the motor works, the stator 200 is fixed, after the coil 130 is electrified, the magnetic field generated by the coil 130 interacts with the magnetic field generated by the magnetic piece 220, so that the mover 100 is driven by the stator 200 to move along the first direction X, and the motor outputs power.

Further, the magnetic member 220 is adhered to the body 210.

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.

In the claims, specification and drawings of the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present utility model and making the description process easier, and not for the purpose of indicating or implying that the device or element in question must have the particular orientation described, be constructed and operated in the particular orientation, and therefore such description should not be construed as limiting the present utility model; the terms "connected," "mounted," "secured," and the like are to be construed broadly, and may be, for example, a fixed connection between a plurality of objects, a removable connection between a plurality of objects, or an integral connection; the objects may be directly connected to each other or indirectly connected to each other through an intermediate medium. The specific meaning of the terms in the present utility model can be understood in detail from the above data by those of ordinary skill in the art.

In the claims, specification, and drawings of the present utility model, the descriptions of terms "one embodiment," "some embodiments," "particular embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In the claims, specification and drawings of the present utility model, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A linear motor comprising a stator and a mover that moves linearly in a first direction relative to the stator, the mover comprising:

The rotor iron core comprises a yoke part and a plurality of tooth parts, wherein the tooth parts are connected with the yoke part and are arranged at intervals along a first direction, each tooth part of the tooth parts extends along a second direction, and a wire slot is arranged between two adjacent tooth parts of the tooth parts;

the plurality of groups of coils are respectively sleeved on at least part of the tooth parts;

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 groove in the first direction and the first width is a second width, the first length is smaller 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 of claim 1, wherein a ratio of the first length to the second length is greater than or equal to 0.8 and less than 1, and wherein 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 of claim 1, wherein a ratio of the first length to the second length is greater than or equal to 0.1 and less than 0.8, and wherein 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 of claim 3, wherein 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 of claim 1, wherein the plurality of teeth comprises:

at least two first teeth disposed at both ends of the yoke, respectively;

a plurality of second teeth disposed between the at least two first teeth;

the first length of the first tooth is less than the first length of the second tooth.

6. The linear motor of claim 5, wherein the plurality of sets of coils are respectively sleeved on the plurality of second teeth, and two adjacent sets of coils in the plurality of sets of coils are positioned in the same wire slot.

7. The linear motor of claim 5, wherein the plurality of teeth comprises: the winding teeth and the non-winding teeth are alternately arranged, and the plurality of groups of coils are respectively sleeved on the plurality of winding teeth.

8. The linear motor of any one of claims 1 to 7, wherein each of the plurality of sets of coils comprises:

the first coil section is sleeved on the tooth part and is positioned in the wire slot;

and a second coil segment connected to the first coil segment and extending between the tooth and the stator.

9. The linear motor of claim 8, wherein the width of the second coil section in the first direction is greater than the width of the first coil section in the first direction, and the second coil sections of adjacent two sets of coils are arranged in an insulated manner.

10. The linear motor according to any one of claims 1 to 7, wherein the stator includes:

a body;

the plurality of magnetic pieces are arranged on the body and are arranged along the first direction and are opposite to the plurality of groups of coils.