CN220857717U - Stator and servo motor - Google Patents

Abstract

The utility model provides a stator and a servo motor, wherein the stator comprises: the stator iron core comprises a stator yoke and a plurality of stator teeth connected in the circumferential direction, and the stator yoke is arranged on the radial outer sides of the plurality of stator teeth; the plurality of insulating pieces comprise a first insulating piece and a second insulating piece, the first insulating piece and the second insulating piece are respectively arranged on two adjacent stator teeth, and a wire winding groove is formed in one side, away from the stator teeth, of each insulating piece; the plurality of windings comprise first windings and second windings with different wire diameters, the first windings are wound in the wire winding grooves of the first insulating pieces, and the second windings are wound in the wire winding grooves of the second insulating pieces.

Description

Stator and servo motor

Technical Field

The utility model relates to the technical field of servo motor equipment, in particular to a stator and a servo motor.

Background

At present, the servo motor in the related art adopts a concentrated winding and star connection scheme for windings, but the winding coefficient of the form is lower, so that the power density of the servo motor is limited.

Moreover, no matter the segmented stator or the integral stator, a winding groove is formed between adjacent stator teeth in the plurality of stator teeth, the winding groove is fan-shaped, the winding is ladder-shaped, and when the same winding is adjacently installed, the situation that part of space in the groove cannot be utilized exists.

Disclosure of utility model

Embodiments of the present utility model aim to solve at least one of the technical problems existing in the prior art.

To this end, a first aspect of an embodiment of the utility model provides a stator.

A second aspect of an embodiment of the present utility model provides a servo motor.

In view of this, according to a first aspect of an embodiment of the present utility model, there is provided a stator including: the stator iron core comprises a stator yoke and a plurality of stator teeth connected in the circumferential direction, and the stator yoke is arranged on the radial outer sides of the plurality of stator teeth; the plurality of insulating pieces comprise a first insulating piece and a second insulating piece, the first insulating piece and the second insulating piece are respectively arranged on two adjacent stator teeth, and a wire winding groove is formed in one side, away from the stator teeth, of each insulating piece; the plurality of windings comprise first windings and second windings with different wire diameters, the first windings are wound in the wire winding grooves of the first insulating pieces, and the second windings are wound in the wire winding grooves of the second insulating pieces.

The stator provided by the embodiment of the utility model comprises a stator core, a plurality of insulating pieces and a plurality of windings, and particularly, the stator core comprises a stator yoke and a plurality of stator teeth, wherein the stator yoke is arranged on the radial outer side of the plurality of stator teeth, that is, the stator core is a tooth-yoke separated stator core.

In the circumferential direction of the stator core, a plurality of stator teeth are connected, that is, the tooth-yoke separated stator core has no notch, so that cogging torque can be greatly reduced.

It will be appreciated that each stator tooth is provided with an insulating member, and in particular that the plurality of insulating members includes a first insulating member and a second insulating member, the first insulating member and the second insulating member being disposed on adjacent two stator teeth, respectively.

One side of each insulating piece, which is away from the stator teeth, is provided with a wire winding groove, the plurality of windings comprise a first winding and a second winding, the first winding is wound on the first insulating piece, the second winding is wound on the second insulating piece, that is, the first winding is wound in the wire winding groove of the first insulating piece, and the second winding is wound in the wire winding groove of the second insulating piece.

Since the first insulating member and the second insulating member are disposed on two adjacent stator teeth, respectively, that is, the first insulating member and the second insulating member are disposed adjacent to each other, and the first winding is wound in the winding slot of the first insulating member, and the second winding is wound in the winding slot of the second insulating member, that is, a portion of the first winding and a portion of the second winding are located in the accommodating space formed by the winding slot of the first insulating member and the winding slot of the second insulating member.

Because the wire diameter of the first winding is different from the wire diameter of the second winding, in the accommodating space formed by the wire winding groove of the first insulating piece and the wire winding groove of the second insulating piece, the first winding or the second winding with smaller wire diameter can be wound with more turns, namely, on the basis that the first winding and the second winding are respectively wound in the adjacent wire winding grooves, the first winding or the second winding with smaller wire diameter can utilize redundant gaps in the accommodating space, thereby fully utilizing the space in the accommodating space, improving the slot filling rate of the stator, further improving the power density of the servo motor with the stator and improving the efficiency of the motor.

In addition, it can be understood that when assembling the stator, the windings are wound on the insulating members in a one-to-one correspondence manner, and then the plurality of insulating members are assembled on the stator teeth respectively, that is, the insulating members are integral insulating frames, compared with the prior art that the segmented iron core structure is wound on a single tooth, and the integral insulating frames are adopted for the plug-in frames or the spliced frames, so that the winding is prevented from being loosened after the winding.

It should be noted that the wire diameter of the first winding is different from the wire diameter of the second winding, specifically, the wire diameter of the first winding is larger than the wire diameter of the second winding. Or the wire diameter of the first winding is smaller than that of the second winding, and the arrangement can be specifically carried out according to actual needs.

The wire diameter of the first winding is smaller than that of the second winding, and the number of turns of the first winding is larger than that of the second winding, namely, when the first winding and the second winding are wound in the wire winding groove of the first insulating piece and the wire winding groove of the second insulating piece respectively, more turns are wound in the accommodating space of the two wire winding grooves, so that redundant gaps in the accommodating space are fully utilized, and the groove filling rate of the stator is improved.

Alternatively, the insulating member is an insulating material having high fluidity.

Optionally, the number of the first insulating pieces is plural, the number of the second insulating pieces is plural, and the plurality of first insulating pieces and the plurality of second insulating pieces are alternately arranged on the plurality of stator teeth along the circumferential direction of the stator core, that is, any one of the first insulating pieces is located between the two second insulating pieces. So that the plurality of first windings and the plurality of second windings are alternately arranged after being respectively wound. That is, each of the two adjacent winding grooves has a first winding and a second winding having different wire diameters.

The first windings and the second windings with different wire diameters are distributed in the containing spaces formed by the adjacent two winding grooves in a staggered mode, so that the groove filling rate of the stator can be improved to the greatest extent, and the power density of the servo motor is further improved.

In addition, the stator provided by the technical scheme of the utility model has the following additional technical characteristics:

In some technical solutions, optionally, the stator further includes an adapter plate, the adapter plate includes a star connection circuit and a triangle connection circuit, the star connection circuit and the triangle connection circuit are electrically connected, the first winding is electrically connected with the star connection circuit, and the second winding is electrically connected with the triangle connection circuit.

In this technical scheme, it is defined that the stator further includes an adapter plate, specifically, the adapter plate includes a star connection circuit and a triangle connection circuit, and the star connection circuit and the triangle connection circuit are electrically connected. The first winding is connected with the star-shaped connection circuit, and the second winding is connected with the triangle-shaped connection circuit. Thereby realizing the star-delta hybrid connection of the first winding and the second winding.

It is understood that when the first winding and the second winding are respectively plural, the plural first windings are connected to the star connection circuit, and the plural second windings are connected to the delta connection circuit.

Because the star-delta hybrid connection circuit is arranged in the adapter plate, after the adapter plate is electrically connected with the two windings, the star-delta hybrid connection of the two windings can be realized, the winding coefficient of the servo motor is effectively improved, the advantages of the circuit in the adapter plate are utilized, and the power density of the servo motor and the efficiency of the motor are effectively improved on the premise that the stator installation process and the cost of the servo motor are not changed.

Optionally, two binding posts are arranged on each insulating piece, and the head end or the tail end of each winding is respectively arranged on the two binding posts on one insulating piece, so that the head and tail conduction of each winding is realized. And then welding the adapter plate with the binding posts, so as to form a passage.

Optionally, the interposer includes a PCB circuit board.

In some technical schemes, optionally, the first insulating piece is provided with two first binding posts, the head end and the tail end of the first winding are respectively wound on the two first binding posts, and the two first binding posts are connected with the adapter plate; the second insulating piece is provided with two second binding posts, the head end and the tail end of the second winding are respectively wound on the two second binding posts, and the two second binding posts are connected with the adapter plate; wherein, the interval between two first terminal is different with the interval between two second terminal.

In the technical scheme, the first insulating piece is limited to be provided with two first binding posts, the head end and the tail end of the first winding are respectively wound on the two first binding posts so as to realize head-to-tail conduction of the first winding, and the two first binding posts are connected with the adapter plate, so that connection of the first winding and a star-shaped connection circuit of the adapter plate is realized.

The second insulating piece is provided with two second binding posts, the head end and the tail end of the second winding are respectively wound on the two second binding posts to realize head-tail conduction of the second winding, and the two second binding posts are connected with the adapter plate, so that the connection of the second winding and a triangle connection circuit of the adapter plate is realized.

Because the interval between two first binding posts on the first insulating part is different from the interval between two second binding posts on the second insulating part, when the adapter plate is installed, namely when the adapter plate is connected with the first binding posts and the second binding posts, the adapter plate can be rapidly positioned, the anti-fool effect is obvious, the installation efficiency of the adapter plate is obviously improved, the overall installation efficiency of the stator is further improved, the assembly cost is reduced, and the mass production is facilitated.

Optionally, the first terminal and the second terminal are both conductors.

In some embodiments, optionally, the adapter plate is provided with a plurality of first connection holes and a plurality of second connection holes, each first binding post is disposed at one first connection hole, and each second binding post is disposed at one second connection hole.

In the technical scheme, the adapter plate is defined to comprise a plurality of first connecting holes and a plurality of second connecting holes, each first binding post is arranged at one first connecting hole, and each second binding post is arranged at one second connecting hole, so that the connection between the first binding posts and the adapter plate is realized.

Because the interval between two first binding posts on the first insulating part is different from the interval between two second binding posts on the second insulating part, that is to say, the interval between two adjacent first connecting holes on the adapter plate is different from the interval between two adjacent second connecting holes, when the adapter plate is installed, the quick assembly between the adapter plate and a plurality of first binding posts and a plurality of second binding posts can be realized without intentional alignment, and the fool-proof effect is realized.

In addition, it can be understood that a plurality of first binding posts and a plurality of second binding posts are respectively inserted into corresponding first connecting holes and second connecting holes on the adapter plate, and the adapter plate can be limited in the circumferential direction of the stator core, so that smooth plug connection between a plug connection port on the adapter plate and a plug connector on the machine shell is ensured.

Optionally, when the first binding posts are respectively inserted into the first connecting holes and the second binding posts are respectively inserted into the second connecting holes, welding is performed in each first connecting hole and each second connecting hole so as to realize connection between the first binding posts and the second binding posts and the adapter plate.

In some technical solutions, optionally, at least one of the first insulating member and the second insulating member is further provided with a limiting portion, the limiting portion is disposed at intervals with the first binding post or the second binding post, and along an axial direction of the stator core, the at least one limiting portion abuts against the adapter plate.

In this technical solution, it is defined that at least one of the first insulating member and the second insulating member is further provided with a limiting portion, specifically, the first insulating member is provided with a limiting portion, or the second insulating member is provided with a limiting portion. Or the first insulating piece and the second insulating piece are provided with limiting parts. The setting can be specifically performed according to actual needs.

The spacing portion is arranged at intervals with the first binding post or the second binding post. Specifically, when being equipped with spacing portion on the first insulating part, spacing portion and first terminal interval setting, when being equipped with spacing portion on the second insulating part, spacing portion and second terminal interval setting.

Along the axial direction of stator core, at least one spacing portion offsets with the keysets to when installing the keysets, can carry out spacingly to the keysets in axial direction, when installing the keysets promptly, when keysets offsets with spacing portion, the keysets installation in place of explanation promptly, thereby can effectively improve the installation effectiveness of keysets, and then promote the holistic installation effectiveness of stator, reduce assembly cost.

Moreover, the axial limiting part is used for axially limiting the adapter plate, so that the installation stability of the adapter plate can be ensured, the axial movement of the adapter plate is avoided, namely, the uniqueness of the installation positions of the machine shell and the adapter plate is ensured, the smooth plug-in connection between the plug-in port on the adapter plate and the plug-in connector on the machine shell is realized, and the running stability and reliability of the servo motor with the stator are improved.

Optionally, a limiting part is arranged on each insulating part, so that the mounting efficiency of the adapter plate can be further improved, the mounting stability of the adapter plate is ensured, and the axial movement of the adapter plate is further avoided.

In some technical solutions, optionally, a positioning groove is further formed on the outer side of at least one insulating member along the radial direction of the stator core; the adapter plate is provided with at least one positioning hole, and each positioning hole is opposite to one positioning groove along the axial direction of the stator core.

In this technical scheme, it has been limited along stator core's radial direction, and the outside of at least one insulating part still is provided with the constant head tank, and it can be understood that when carrying out the suit of stator tooth and stator yoke, available frock and constant head tank cooperation to can guarantee the relative position of stator tooth and stator yoke installation, realize stator yoke and stator tooth's quick reliable assembly, and then promote stator's assembly efficiency.

In addition, after the stator is assembled, when the stator is integrally assembled on the shell, the fixture can be matched with the positioning groove, so that the relative position between the plug-in port on the adapter plate and the plug-in connector on the shell is ensured, the quick plug-in connection is realized, and the smooth installation of the plug-in connector is ensured.

In addition, in the process of installing the adapter plate, the installation and the positioning of the adapter plate can be realized through the matching of the positioning groove and the positioning hole on the adapter plate, so that the installation efficiency of the adapter plate is improved, the overall installation efficiency of the stator is further improved, and the assembly cost of the stator is reduced.

Optionally, a positioning groove is disposed on the radial outer side of each insulating member, so as to improve the positioning effect.

The adapter plate is provided with at least one positioning hole, specifically, the positioning hole is opposite to the positioning groove along the axial direction of the stator core, namely, the positioning groove is matched with the positioning hole on the adapter plate to realize the installation and positioning of the adapter plate, so that the installation efficiency of the adapter plate is improved, the overall installation efficiency of the stator is further improved, and the assembly cost of the stator is reduced.

Optionally, a plurality of positioning holes are formed in the adapter plate, the positioning holes are arranged at intervals, and each positioning hole is axially opposite to one positioning groove, so that rapid installation and positioning of the adapter plate are realized, the installation efficiency of the adapter plate is further improved, the overall installation efficiency of the stator is further improved, and the assembly cost of the stator is reduced.

In some technical solutions, optionally, each insulating piece further includes an insulating portion, the insulating portion is provided with a mounting hole, the stator teeth pass through the mounting hole, and the winding slot is arranged on one side of the insulating portion away from the mounting hole; wherein, along the circumferential direction of the stator core, the minimum value d of the thickness of at least one insulating part satisfies d.ltoreq.0.3 mm.

In this technical scheme, it is still including the insulating part to have limited each insulating part, and specifically, the insulating part is provided with the mounting hole, after winding a plurality of windings respectively on a plurality of insulating parts, and every stator tooth passes the mounting hole on an insulating part, realizes the assembly of insulating part and stator tooth.

The winding groove is arranged on one side of the insulating part, which is away from the mounting hole, that is, along the circumferential direction of the stator core, the mounting hole is positioned on the inner side of the insulating part, and the winding groove is positioned on the outer side of the insulating part.

Along the circumference direction of stator core, the minimum of insulating part thickness is less than or equal to 0.3mm, that is to say, the thickness of the thinnest department of insulating part is less than or equal to 0.3mm, namely the circumference thickness of insulating part attenuate to effectively increase the space of wire winding groove, increase the number of turns that the winding was wound in the wire winding groove, even the space in the wire winding groove can be utilized by a wide margin, further improve groove full rate and servo motor's power density, promote motor efficiency.

In some embodiments, optionally, the stator further includes a compressing member disposed in the mounting hole and abutting the stator teeth.

In this technical scheme, it still includes the compressing tightly piece to have limited the stator, specifically, compressing tightly the piece setting in the mounting hole, and compressing tightly piece and stator tooth offset to when will around the insulating piece after establishing the winding on the stator tooth, because compressing tightly piece and stator tooth offset, thereby can assemble the insulating piece on the stator tooth reliably, effectively prevent after the insulating piece is installed, the problem that the insulating piece drops from the stator tooth at the in-process that the stator removed, ensure stability and reliability after the stator assembly, and then promote the operating stability of servo motor that has this stator.

Furthermore, the mounting efficiency can be improved while achieving reliable assembly of the insulator with the stator teeth, compared to the related art in which the insulating frame is directly assembled on the stator teeth.

Optionally, the compressing member and the insulating member are in an integral structure, and it is understood that the integral structure has good mechanical properties, so that the connection strength of the compressing member and the insulating member can be improved, and effective matching of the compressing member and the stator teeth is ensured. In addition, the integrated structure is beneficial to processing and production, so that the production cost of the stator can be reduced.

Optionally, the compressing element includes the elastic component, when the stator tooth passes the mounting hole on the insulating component after winding, the stator tooth offsets with the elastic component, that is to say, in the in-process that the stator tooth passed the mounting hole, because the stator tooth extrudes the elastic component, thereby make the elastic component take place elastic deformation, the elastic component that takes place elastic deformation produces the elastic force to the one side that the stator tooth is located, with the compressive force between improvement stator tooth and the elastic component, make the insulating component firmly assemble on the stator tooth, effectively prevent after the insulating component is installed, the problem that the insulating component drops from the stator tooth at the in-process that the stator removed, ensure stability and reliability after the stator assembly, and then promote the operating stability of servo motor that has this stator.

Optionally, the compressing element includes a plurality of fins, a plurality of fins are located the mounting hole interval and arrange, every fin along stator core's radial direction and extend in the mounting hole, and a plurality of fins offset with the stator tooth, that is to say, when the stator tooth passes the mounting hole on the insulating element after winding, the stator tooth offsets with a plurality of fins, that is to say, at the in-process that the stator tooth passed the mounting hole, because a plurality of fins are extruded to the stator tooth for the insulating element firmly assembles on the stator tooth, effectively prevents the insulating element installation back, the problem that the insulating element drops from the stator tooth at the in-process that the stator removed.

In some embodiments, optionally, each insulating member is provided with a plurality of wire-arranging grooves along a radial direction of the stator core, the plurality of wire-arranging grooves are located in the wire-winding grooves, and the wire-arranging grooves are adapted to a wire diameter of a winding wound on the insulating member.

In this solution, it is defined that each insulator is provided with a plurality of wire-arranging grooves, in particular, the wire-arranging grooves on each insulator are located in the wire-winding grooves on the insulator.

The winding grooves are matched with the wire diameters of the windings wound on the insulating piece, that is to say, each winding is matched with a plurality of winding grooves on the insulating piece where the winding grooves are located, so that after the windings are wound on the plurality of winding grooves, the windings can be tightly and orderly arranged, the number of turns wound on the windings can be increased under the condition of the same space, the slot filling rate is improved, the power density of the servo motor with the stator is further improved, and the motor efficiency is improved.

In some embodiments, optionally, at least one wire-arranging groove is provided through in an axial direction of the stator core.

In this technical scheme, along stator core's axial direction, at least one winding displacement groove link up the setting, that is to say, at least one winding displacement groove is axial link up to after around establishing the winding on a plurality of winding displacement grooves, can make the wire winding arrange inseparabler, neat, further improve groove full rate and servo motor's power density, promote motor efficiency.

Optionally, each wire-arranging groove is communicated along the axial direction of the stator core, so that the winding arrangement is further compact and tidy, and the groove filling rate and the power density of the servo motor are further improved.

In some embodiments, optionally, each stator tooth includes a tooth portion and a tooth root portion connected to each other, and the plurality of tooth root portions are sequentially connected to each other along the circumferential direction of the stator core, with the tooth portion being located between the tooth root portion and the stator yoke.

In this technical solution, it is defined that each stator tooth includes a tooth portion and a tooth root portion connected to each other, specifically, in a circumferential direction of the stator core, the tooth root portions of the plurality of stator teeth are sequentially connected to each other, and the plurality of teeth are respectively located between the plurality of tooth root portions and the stator yoke.

Since a plurality of stator teeth are connected in the circumferential direction of the stator core, that is, the tooth-yoke separated stator core has no slot, cogging torque can be greatly reduced.

In addition, the stator core is a tooth-yoke separated stator core, when the stator is assembled, the windings are wound on the insulating pieces in a one-to-one correspondence mode, and then the insulating pieces are assembled on the stator teeth, that is, the insulating pieces are integral insulating frames, compared with the prior art that the segmented iron core structure is used for winding on single teeth, the integral insulating frames are adopted for the plug-in frames or the splicing frames, and the winding is prevented from being loosened after the winding.

In some embodiments, optionally, a side of the stator yoke facing the plurality of stator teeth is provided with a plurality of spaced apart protrusions, each protrusion abutting one of the stator teeth.

In this technical solution, it is defined that the side of the stator yoke facing the plurality of stator teeth is provided with a plurality of spaced protrusions, each of which abuts against one stator tooth, that is, each protrusion abuts against one stator tooth when the stator yoke is integrally fitted over the stator teeth, so that the assembly of the separated stator core stator teeth and the stator yoke is achieved.

Because the convex parts are arranged at intervals, a concave part is arranged between two adjacent convex parts, so that each concave part and two adjacent stator teeth provide accommodating spaces for the insulating part, namely the concave parts play a role of avoiding the insulating part.

In addition, a concave part is formed between two adjacent convex parts on the stator yoke, so that the stator teeth and the stator yoke can be sleeved and punched, namely, the stator teeth and the stator yoke can be manufactured at one time, the production efficiency of the stator is improved, and the production cost of the stator is reduced.

According to a second aspect of the present utility model, there is provided a servo motor, including a stator provided in any of the above-mentioned technical solutions, so as to have all the beneficial technical effects of the stator, which are not described herein again.

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 shows one of the structural schematic diagrams of a stator according to an embodiment of the present utility model;

FIG. 2 shows an enlarged view of the stator of the embodiment of FIG. 1 at A;

FIG. 3 shows a second schematic structural view of a stator according to an embodiment of the present utility model;

FIG. 4 shows a third schematic structural view of a stator according to an embodiment of the utility model;

FIG. 5 shows one of the schematic structural views of an insulator according to one embodiment of the present utility model;

FIG. 6 shows a second schematic structural view of an insulator according to one embodiment of the present utility model;

fig. 7 shows a fourth schematic structural view of a stator according to an embodiment of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 7 is:

100 stators, 110 stator cores, 111 stator yokes, 112 stator teeth, 120 insulating members, 121 winding grooves, 122 insulating portions, 123 mounting holes, 140 windings, 141 first windings, 142 second windings, 150 adapter plates, 151 positioning holes, 152 first connecting holes, 153 second connecting holes, 160 first binding posts, 170 second binding posts, 180 limiting portions, 190 positioning grooves, 210 pressing members, 220 winding grooves, 230 tooth portions, 240 tooth root portions, 250 convex portions, 260 concave portions, 270 first insulating members, and 280 second insulating members.

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, without conflict, the embodiments of the present utility model and 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, but the present utility model may be practiced otherwise than as described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

A stator 100 and a servo motor provided according to some embodiments of the present utility model are described below with reference to fig. 1 to 7.

In one embodiment according to the present application, as shown in fig. 1 and 2, a stator 100 is proposed, the stator 100 comprising: a stator core 110, the stator core 110 including a stator yoke 111 and a plurality of stator teeth 112 connected in a circumferential direction, the stator yoke 111 being provided radially outside the plurality of stator teeth 112; the plurality of insulating pieces 120, the plurality of insulating pieces 120 comprise a first insulating piece 270 and a second insulating piece 280, the first insulating piece 270 and the second insulating piece 280 are respectively arranged on two adjacent stator teeth 112, and a winding groove 121 is arranged on one side of each insulating piece 120, which is away from the stator teeth 112; the plurality of windings 140, the plurality of windings 140 includes a first winding 141 and a second winding 142 having different wire diameters, the first winding 141 is wound in the winding slot 121 of the first insulator 270, and the second winding 142 is wound in the winding slot 121 of the second insulator 280.

The stator 100 provided by the embodiment of the utility model includes a stator core 110, a plurality of insulators 120 and a plurality of windings 140, and specifically, the stator core 110 includes a stator yoke 111 and a plurality of stator teeth 112, and the stator yoke 111 is disposed radially outside the plurality of stator teeth 112, that is, the stator core 110 is a tooth-yoke separated stator core 110.

In the circumferential direction of the stator core 110, a plurality of stator teeth 112 are connected, that is, the tooth-yoke separated stator core 110 has no slot, so that cogging torque can be greatly reduced.

It will be appreciated that each stator tooth 112 is provided with an insulator 120, and specifically, the plurality of insulators 120 includes a first insulator 270 and a second insulator 280, the first insulator 270 and the second insulator 280 being disposed on adjacent two stator teeth 112, respectively.

Each of the insulators 120 is provided with a winding slot 121 on a side facing away from the stator teeth 112, and the plurality of windings 140 includes a first winding 141 and a second winding 142, the first winding 141 being wound on the first insulator 270, the second winding 142 being wound on the second insulator 280, that is, the first winding 141 being wound in the winding slot 121 of the first insulator 270, and the second winding 142 being wound in the winding slot 121 of the second insulator 280.

Since the first insulator 270 and the second insulator 280 are disposed on the adjacent two stator teeth 112, respectively, that is, the first insulator 270 and the second insulator 280 are disposed adjacent to each other, and the first winding 141 is wound in the winding slot 121 of the first insulator 270, and the second winding 142 is wound in the winding slot 121 of the second insulator 280, that is, a portion of the first winding 141 and a portion of the second winding 142 are located in the accommodating space formed by the winding slot 121 of the first insulator 270 and the winding slot 121 of the second insulator 280.

Because the wire diameters of the first winding 141 and the second winding 142 are different, in the accommodating space formed by the winding slot 121 of the first insulating member 270 and the winding slot 121 of the second insulating member 280, the first winding 141 or the second winding 142 with smaller wire diameters can be wound with more turns, that is, on the basis that the first winding 141 and the second winding 142 are respectively wound in the adjacent winding slots 121, the first winding 141 or the second winding 142 with smaller wire diameters utilizes redundant gaps in the accommodating space, thereby fully utilizing the space in the accommodating space, improving the slot filling rate of the stator 100, further improving the power density of the servo motor with the stator 100 and improving the efficiency of the motor.

In addition, it can be understood that when the stator 100 is assembled, the windings 140 are wound on the insulating members 120 in a one-to-one correspondence manner, and then the plurality of insulating members 120 are assembled on the stator teeth 112 respectively, that is, the insulating members 120 are integral insulating frames, compared with the prior art that the segmented iron core structure is wound on a single tooth, and the integral insulating frames are adopted for the plug-in frames or the spliced frames, so that the winding is prevented from being loosened after the winding.

It should be noted that the wire diameter of the first winding 141 is different from the wire diameter of the second winding 142, specifically, the wire diameter of the first winding 141 is larger than the wire diameter of the second winding 142. Or the wire diameter of the first winding 141 is smaller than that of the second winding 142, and may be specifically set according to actual needs.

The wire diameter of the first winding 141 is smaller than the wire diameter of the second winding 142, and the number of turns of the first winding 141 is larger than the number of turns of the second winding 142, that is, when the first winding 141 and the second winding 142 are wound in the winding grooves 121 of the first insulator 270 and the winding grooves 121 of the second insulator 280, respectively, more turns are wound in the accommodating space formed by the two winding grooves 121 by the first winding 141 with smaller wire diameter, so that the redundant gaps in the accommodating space are fully utilized, and the slot filling rate of the stator 100 is improved.

Alternatively, the insulator 120 is an insulating material having high fluidity.

Alternatively, the number of the first insulating members 270 is plural, the number of the second insulating members 280 is plural, and the plurality of first insulating members 270 and the plurality of second insulating members 280 are alternately disposed on the plurality of stator teeth 112 along the circumferential direction of the stator core 110, that is, any one of the first insulating members 270 is located between two of the second insulating members 280. So that the plurality of first windings 141 and the plurality of second windings 142 are alternately arranged after being wound respectively. That is, each of the two adjacent winding grooves 121 has a first winding 141 and a second winding 142 having different wire diameters.

The first winding 141 and the second winding 142 with different wire diameters are distributed in the containing space formed by the two adjacent winding slots 121 in a staggered manner, so that the slot filling rate of the stator 100 can be improved to the greatest extent, and the power density of the servo motor can be further improved.

As shown in fig. 3, 4 and 7, in some embodiments, optionally, the stator 100 further includes an adapter plate 150, the adapter plate 150 includes a star connection circuit and a delta connection circuit, the star connection circuit and the delta connection circuit are electrically connected, the first winding 141 is electrically connected to the star connection circuit, and the second winding 142 is electrically connected to the delta connection circuit.

In this embodiment, it is defined that the stator 100 further includes an adapter plate 150, specifically, the adapter plate 150 includes a star connection circuit and a delta connection circuit, and the star connection circuit and the delta connection circuit are electrically connected. The first winding 141 is connected to the star connection circuit, and the second winding 142 is connected to the delta connection circuit. Thereby realizing a star-delta hybrid connection of the first winding 141 and the second winding 142.

It is understood that when the first winding 141 and the second winding 142 are respectively plural, the plural first windings 141 are connected to the star connection circuit, and the plural second windings 142 are connected to the delta connection circuit.

Because the star-delta hybrid connection circuit is arranged in the adapter plate 150, after the adapter plate 150 is electrically connected with the two windings, the star-delta hybrid connection of the two windings can be realized, the winding coefficient of the servo motor is effectively improved, the advantages of the circuit in the adapter plate 150 are utilized, the power density of the servo motor is effectively improved on the premise that the mounting process of the stator 100 and the cost of the servo motor are not changed, and the efficiency of the motor is improved.

Optionally, two binding posts are disposed on each insulating member 120, and the head end or the tail end of each winding 140 is disposed on the two binding posts on one insulating member 120, so as to realize head-to-tail conduction of each winding 140. The adapter plate 150 is then soldered to the plurality of posts to form a passageway.

Optionally, the interposer 150 includes a PCB circuit board.

As shown in fig. 3, 4, 6 and 7, in some embodiments, optionally, the first insulating member 270 is provided with two first binding posts 160, and the head end and the tail end of the first winding 141 are respectively wound on the two first binding posts 160, and the two first binding posts 160 are connected with the adapter plate 150; the second insulating member 280 is provided with two second binding posts 170, the head end and the tail end of the second winding 142 are respectively wound on the two second binding posts 170, and the two second binding posts 170 are connected with the adapter plate 150; wherein the spacing between the two first posts 160 is different from the spacing between the two second posts 170.

In this embodiment, the first insulating member 270 is defined to be provided with two first binding posts 160, and the head end and the tail end of the first winding 141 are respectively wound on the two first binding posts 160 to realize the head-to-tail conduction of the first winding 141, and the two first binding posts 160 are connected with the adapter plate 150, so that the connection between the first winding 141 and the star connection circuit of the adapter plate 150 is realized.

The second insulating member 280 is provided with two second binding posts 170, and the head end and the tail end of the second winding 142 are respectively wound on the two second binding posts 170, so that the head and the tail of the second winding 142 are conducted, and the two second binding posts 170 are connected with the adapter plate 150, so that the connection of the second winding 142 and the triangle connection circuit of the adapter plate 150 is realized.

Because the interval between the two first binding posts 160 on the first insulating member 270 is different from the interval between the two second binding posts 170 on the second insulating member 280, when the adapter plate 150 is installed, namely when the adapter plate 150 is connected with the first binding posts 160 and the second binding posts 170, the adapter plate 150 can be quickly positioned, the obvious fool-proof effect is achieved, the installation efficiency of the adapter plate 150 is obviously improved, the overall installation efficiency of the stator 100 is further improved, the assembly cost is reduced, and mass production is facilitated.

Optionally, the first terminal 160 and the second terminal 170 are both conductors.

As shown in fig. 3 and 4, in some embodiments, optionally, the adapter plate 150 is provided with a plurality of first connection holes 152 and a plurality of second connection holes 153, where each first terminal 160 is disposed at one first connection hole 152 and each second terminal 170 is disposed at one second connection hole 153.

In this embodiment, the adapter plate 150 is defined to include a plurality of first connection holes 152 and a plurality of second connection holes 153, each of the first posts 160 is disposed at one of the first connection holes 152, and each of the second posts 170 is disposed at one of the second connection holes 153, thereby achieving connection between the plurality of first posts 160 and the plurality of second posts 170 and the adapter plate 150.

Because the distance between the two first binding posts 160 on the first insulating member 270 is different from the distance between the two second binding posts 170 on the second insulating member 280, that is, the distance between the two adjacent first connecting holes 152 on the adapter plate 150 is different from the distance between the two adjacent second connecting holes 153, when the adapter plate 150 is installed, the adapter plate 150 can be quickly assembled with the first binding posts 160 and the second binding posts 170 without intentional alignment, and the fool-proof effect is achieved.

In addition, it can be understood that the plurality of first binding posts 160 and the plurality of second binding posts 170 are respectively inserted into the corresponding first connecting holes 152 and the second connecting holes 153 on the adapter plate 150, and can also limit the adapter plate 150 in the circumferential direction of the stator core 110, so as to ensure smooth plugging between the plugging port on the adapter plate 150 and the plugging piece on the housing.

Alternatively, when the plurality of first posts 160 are inserted into the plurality of first connection holes 152, respectively, and the plurality of second posts 170 are inserted into the plurality of second connection holes 153, respectively, welding is performed in each of the first connection holes 152 and each of the second connection holes 153 to achieve connection between the plurality of first posts 160 and the plurality of second posts 170 and the adapter plate 150.

As shown in fig. 4, 6 and 7, in some embodiments, optionally, at least one of the first insulating member 270 and the second insulating member 280 is further provided with a limiting portion 180, where the limiting portion 180 is spaced from the first terminal 160 or the second terminal 170, and at least one limiting portion 180 abuts against the adapter plate 150 along the axial direction of the stator core 110.

In this embodiment, it is defined that at least one of the first insulating member 270 and the second insulating member 280 is further provided with a stopper 180, specifically, the stopper 180 is provided on the first insulating member 270 or the stopper 180 is provided on the second insulating member 280. Or the first insulator 270 and the second insulator 280 are provided with a limit part 180. The setting can be specifically performed according to actual needs.

The limiting portion 180 is spaced apart from the first terminal 160 or the second terminal 170. Specifically, when the first insulating member 270 is provided with the limiting portion 180, the limiting portion 180 is spaced from the first terminal 160, and when the second insulating member 280 is provided with the limiting portion 180, the limiting portion 180 is spaced from the second terminal 170.

Along the axial direction of the stator core 110, the at least one limiting portion 180 abuts against the adapter plate 150, so that when the adapter plate 150 is installed, the adapter plate 150 can be limited in the axial direction, namely, when the adapter plate 150 is installed, the adapter plate 150 abuts against the limiting portion 180, namely, the adapter plate 150 is installed in place, and therefore the installation efficiency of the adapter plate 150 can be effectively improved, the overall installation efficiency of the stator 100 is further improved, and the assembly cost is reduced.

Moreover, the limiting part 180 is used for axially limiting the adapter plate 150, so that the installation stability of the adapter plate 150 can be ensured, the adapter plate 150 is prevented from axially moving, namely, the uniqueness of the installation positions of the casing and the adapter plate 150 is ensured, the smooth plug-in connection between the plug-in port on the adapter plate 150 and the plug-in connector on the casing is realized, and the operation stability and reliability of the servo motor with the stator 100 are improved.

Optionally, a limiting portion 180 is disposed on each insulating member 120, so that the mounting efficiency of the adaptor plate 150 can be further improved, the mounting stability of the adaptor plate 150 can be ensured, and the adaptor plate 150 is further prevented from moving axially.

As shown in fig. 4 and 6, in some embodiments, optionally, a positioning groove 190 is further provided on the outer side of at least one insulating member 120 along the radial direction of the stator core 110; the adapter plate 150 is provided with at least one positioning hole 151, and each positioning hole 151 is opposite to one positioning groove 190 in the axial direction of the stator core 110.

In this embodiment, a positioning groove 190 is defined along the radial direction of the stator core 110, and it is understood that, when the stator teeth 112 and the stator yoke 111 are sleeved, the positioning groove 190 may be matched with a fixture, so that the relative positions of the stator teeth 112 and the stator yoke 111 can be ensured, the stator yoke 111 and the stator teeth 112 can be assembled quickly and reliably, and the assembly efficiency of the stator 100 is improved.

In addition, after the stator 100 is assembled, when the stator 100 is integrally assembled on the casing, the fixture and the positioning groove 190 can be used to cooperate, so that the relative position between the plug interface on the adapter plate 150 and the plug connector on the casing is ensured, the quick plug connection is realized, and the smooth installation of the plug connector is ensured.

In addition, in the process of installing the adapter plate 150, the positioning groove 190 and the positioning hole 151 on the adapter plate 150 are matched to realize the installation and positioning of the adapter plate 150, so that the installation efficiency of the adapter plate 150 is improved, the overall installation efficiency of the stator 100 is further improved, and the assembly cost of the stator 100 is reduced.

Optionally, a positioning groove 190 is provided on the radially outer side of each insulating member 120 to enhance the positioning effect.

The adapter plate 150 is provided with at least one positioning hole 151, specifically, along the axial direction of the stator core 110, the positioning hole 151 is opposite to the positioning groove 190, that is, the positioning groove 190 is matched with the positioning hole 151 on the adapter plate 150 to realize the installation and positioning of the adapter plate 150, so that the installation efficiency of the adapter plate 150 is improved, the overall installation efficiency of the stator 100 is further improved, and the assembly cost of the stator 100 is reduced.

Optionally, a plurality of positioning holes 151 are provided on the adapter plate 150, the plurality of positioning holes 151 are arranged at intervals, and each positioning hole 151 is axially opposite to one positioning groove 190, so that rapid installation and positioning of the adapter plate 150 are realized, the installation efficiency of the adapter plate 150 is further improved, the overall installation efficiency of the stator 100 is further improved, and the assembly cost of the stator 100 is reduced.

As shown in fig. 5, in some embodiments, optionally, each insulating member 120 further includes an insulating portion 122, the insulating portion 122 is provided with a mounting hole 123, the stator teeth 112 pass through the mounting hole 123, and the wire winding slot 121 is provided on a side of the insulating portion 122 facing away from the mounting hole 123; wherein, along the circumferential direction of the stator core 110, a minimum value d of the thickness of the at least one insulating portion 122 satisfies d.ltoreq.0.3 mm.

In this embodiment, each of the insulators 120 is defined to further include an insulating portion 122, and in particular, the insulating portion 122 is provided with a mounting hole 123, and after winding the plurality of windings 140 on the plurality of insulators 120, respectively, each of the stator teeth 112 passes through the mounting hole 123 on one of the insulators 120 to effect assembly of the insulators 120 with the stator teeth 112.

The wire winding groove 121 is provided at a side of the insulating portion 122 facing away from the mounting hole 123, that is, in the circumferential direction of the stator core 110, the mounting hole 123 is located at an inner side of the insulating member 120, and the wire winding groove 121 is located at an outer side of the insulating member 120.

Along the circumferential direction of the stator core 110, the minimum value of the thickness of the insulating portion 122 is less than or equal to 0.3mm, that is, the thickness of the thinnest part of the insulating portion 122 is less than or equal to 0.3mm, that is, the circumferential thickness of the insulating portion 122 is thinned, so that the space of the winding slot 121 is effectively increased, the number of turns of the winding 140 in the winding slot 121 is increased, even if the space in the winding slot 121 can be greatly utilized, the slot fullness rate and the power density of the servo motor are further improved, and the motor efficiency is improved.

As shown in fig. 5 and 6, in some embodiments, the stator 100 optionally further includes a hold-down member 210, the hold-down member 210 being disposed within the mounting hole 123 and abutting the stator teeth 112.

In this embodiment, the stator 100 is defined to further include a compressing member 210, specifically, the compressing member 210 is disposed in the mounting hole 123, and the compressing member 210 abuts against the stator teeth 112, so that when the insulating member 120 around which the winding 140 is wound is assembled on the stator teeth 112, the insulating member 120 can be reliably assembled on the stator teeth 112 due to the abutting of the compressing member 210 against the stator teeth 112, so that the problem that the insulating member 120 falls off from the stator teeth 112 in the moving process of the stator 100 after the insulating member 120 is installed is effectively prevented, the stability and reliability of the assembled stator 100 are ensured, and the operation stability of the servo motor with the stator 100 is further improved.

Also, the mounting efficiency can be improved while achieving reliable assembly of the insulator 120 with the stator teeth 112, as compared to the related art in which the insulator frame is directly assembled on the stator teeth 112.

Alternatively, the compressing element 210 and the insulating element 120 are integrally formed, and it is understood that the integral structure has good mechanical properties, so that the connection strength between the compressing element 210 and the insulating element 120 can be improved, and the compressing element 210 and the stator teeth 112 can be effectively matched. In addition, the integrated structure is also advantageous in terms of processing and production, so that the production cost of the stator 100 can be reduced.

Optionally, the compressing element 210 includes an elastic element, when the stator tooth 112 passes through the mounting hole 123 on the insulating element 120 around which the winding 140 is wound, the stator tooth 112 abuts against the elastic element, that is, during the process that the stator tooth 112 passes through the mounting hole 123, the elastic element is elastically deformed due to the extrusion of the stator tooth 112 by the elastic element, and the elastic element that is elastically deformed generates an elastic force to one side of the stator tooth 112, so as to improve the compressing force between the stator tooth 112 and the elastic element, so that the insulating element 120 is firmly assembled on the stator tooth 112, thereby effectively preventing the problem that the insulating element 120 falls off from the stator tooth 112 during the moving process of the stator 100 after the installation of the insulating element 120, ensuring the stability and reliability of the stator 100 after the assembly, and further improving the operation stability of the servo motor with the stator 100.

Optionally, the pressing member 210 includes a plurality of ribs, the plurality of ribs are disposed in the mounting hole 123 at intervals, each rib extends along the radial direction of the stator core 110 and in the mounting hole 123, and the plurality of ribs are abutted against the stator teeth 112, that is, when the stator teeth 112 pass through the mounting hole 123 on the insulating member 120 around which the winding 140 is wound, the stator teeth 112 are abutted against the plurality of ribs, that is, in the process that the stator teeth 112 pass through the mounting hole 123, since the stator teeth 112 press the plurality of ribs, the insulating member 120 is firmly assembled on the stator teeth 112, so that the problem that the insulating member 120 falls off from the stator teeth 112 in the process that the stator 100 moves after the insulating member 120 is effectively prevented from being mounted.

In some embodiments, optionally, the stator 100 further includes a limiting boss disposed in the mounting hole 123 and spaced from the pressing member 210, and the limiting boss abuts against the stator teeth 112 along the axial direction of the stator core 110.

In this embodiment, it is defined that the stator 100 further includes a limit boss, specifically, the limit boss is disposed in the mounting hole 123 and abuts against the stator teeth 112 in the axial direction of the stator core 110, that is, the stator teeth 112 abut against the limit boss in the axial direction when the stator teeth 112 pass through the mounting hole 123 on the insulator 120 after winding the windings 140.

It will be appreciated that the four corners in the mounting hole 123 are rounded, and if the stator teeth 112 directly contact the inner wall of the mounting hole 123, the rounded structure in the mounting hole 123 is easily damaged.

Through set up spacing boss in mounting hole 123 to make stator tooth 112 and spacing boss offset in the axial direction, thereby make there be certain clearance between stator tooth 112 and the inner wall of mounting hole 123, effectively avoid when carrying out the assembly of insulator 120 and stator tooth 112, the structure of insulator 120 is damaged to stator tooth 112, further extension insulator 120's life guarantees the reliable operation of the servo motor that has this stator 100.

Optionally, the number of the limiting bosses is two along the axial direction of the stator core 110, and the limiting bosses are respectively located at two sides of the axial direction, so as to further avoid damaging the insulating member 120 during the assembly process of the insulating member 120 and the stator teeth 112.

In some embodiments, optionally, an end of the at least one insulator 120 facing away from the adapter plate 150 is provided with a chamfer.

In this embodiment, it is defined that the end of the at least one insulator 120 facing away from the adapter plate 150 is provided with a chamfer. It is understood that, when the stator yoke 111 is assembled, the side of the insulator 120 provided with the chamfer passes through the stator yoke 111, thereby assembling the stator yoke 111 on the stator teeth 112.

By providing a chamfer on the side of at least one insulator 120 facing away from the adapter plate 150, the wear of the insulator 120 can be effectively reduced during the assembly of the stator yoke 111, i.e. the insulator 120 is prevented from being gnawed by the stator yoke 111, the service life of the insulator 120 is prolonged, and the reliable assembly of the stator yoke 111 and the stator teeth 112 is ensured.

Optionally, a chamfer is provided at an end of each insulator 120 facing away from the adapter plate 150, further reducing wear of the insulator 120, extending the service life of the insulator 120, ensuring reliable assembly of the stator yoke 111 with the stator teeth 112.

Optionally, at least one insulating member 120 is symmetrically provided with chamfers on both sides.

As shown in fig. 2 and 5, in some embodiments, optionally, in a radial direction of the stator core 110, each insulation member 120 is provided with a plurality of wire-discharge slots 220, the plurality of wire-discharge slots 220 are located in the wire-discharge slots 121, and the wire-discharge slots 220 are adapted to a wire diameter of the windings 140 wound on the insulation member 120.

In this embodiment, it is defined that each of the insulators 120 is provided with a plurality of wire-discharge grooves 220, specifically, the plurality of wire-discharge grooves 220 on each of the insulators 120 are located in the wire-winding grooves 121 on the insulators 120.

The wire grooves 220 are matched with the wire diameters of the windings 140 wound on the insulating member 120, that is, each winding 140 is matched with a plurality of wire grooves 220 on the insulating member 120 where the winding 140 is located, so that after the winding 140 is wound on the plurality of wire grooves 220, the winding is tightly and orderly arranged, the number of turns wound on the winding 140 can be increased under the condition of the same space, the slot filling rate is improved, the power density of the servo motor with the stator 100 is further improved, and the motor efficiency is improved.

In some embodiments, optionally, at least one wire-discharge slot 220 is provided therethrough in an axial direction of the stator core 110.

In this embodiment, at least one of the winding slots 220 is disposed through in the axial direction of the stator core 110, that is, at least one of the winding slots 220 is disposed through in the axial direction, so that after winding the windings 140 around the winding slots 220, the winding arrangement can be made more compact and neat, the slot filling rate and the power density of the servo motor can be further improved, and the motor efficiency can be improved.

Optionally, each of the wire-arranging grooves 220 penetrates in the axial direction of the stator core 110, further making the wire arrangement more compact and tidy, and further improving the slot filling rate and the power density of the servo motor.

As shown in fig. 1 and 2, in some embodiments, optionally, each stator tooth 112 includes a tooth portion 230 and a tooth root portion 240 that are connected, and in the circumferential direction of the stator core 110, the plurality of tooth root portions 240 are connected in sequence, with the tooth portion 230 being located between the tooth root portion 240 and the stator yoke 111.

In this embodiment, each stator tooth 112 is defined to include a tooth portion 230 and a tooth root portion 240 that are connected, specifically, in the circumferential direction of the stator core 110, the tooth root portions 240 of the plurality of stator teeth 112 are connected in sequence, and the plurality of tooth portions 230 are respectively located between the plurality of tooth root portions 240 and the stator yoke 111.

Since the plurality of stator teeth 112 are connected in the circumferential direction of the stator core 110, that is, the tooth-yoke separated stator core 110 has no slot, the cogging torque can be greatly reduced.

In addition, when the stator 100 is assembled, the windings 140 are wound on the insulators 120 in a one-to-one correspondence manner, and then the insulators 120 are assembled on the stator teeth 112, that is, the insulators 120 are integral insulating frames, compared with the prior art that the segmented iron core structure is used for winding on single teeth, and the integral insulating frames are adopted for inserting frames or splicing frames, so that the winding is prevented from being loosened after the winding.

As shown in fig. 2, in some embodiments, optionally, a side of the stator yoke 111 facing the plurality of stator teeth 112 is provided with a plurality of spaced apart protrusions 250, each protrusion 250 abutting one stator tooth 112.

In this embodiment, it is defined that the side of the stator yoke 111 facing the plurality of stator teeth 112 is provided with a plurality of spaced projections 250, each projection 250 being abutted against one stator tooth 112, that is, each projection 250 being abutted against one stator tooth 112 when the stator yoke 111 is integrally fitted over the stator teeth 112, the assembly of the stator teeth 112 of the split stator core 110 with the stator yoke 111 is achieved.

Since the plurality of protrusions 250 are spaced apart, there is one recess 260 between two adjacent protrusions 250, such that each recess 260 and two adjacent stator teeth 112 provide a receiving space for the insulator 120, i.e., the recess 260 functions to clear the insulator 120.

In addition, the concave portions 260 are formed between two adjacent convex portions 250 on the stator yoke 111, so that the stator teeth 112 and the stator yoke 111 can be sleeved and punched, namely, the stator teeth 112 and the stator yoke 111 can be manufactured at one time, the production efficiency of the stator 100 is improved, and the production cost of the stator 100 is reduced.

According to a second aspect of the present utility model, a servo motor is provided, which includes the stator 100 provided in any of the above embodiments, so that all the beneficial technical effects of the stator 100 are provided, and are not described herein.

Specifically, the stator 100 includes a stator core 110, a plurality of insulators 120, and a plurality of windings 140, and specifically, the stator core 110 includes a stator yoke 111 and a plurality of stator teeth 112, the stator yoke 111 being disposed radially outward of the plurality of stator teeth 112, that is, the stator core 110 is a tooth-yoke separated stator core 110.

In the circumferential direction of the stator core 110, a plurality of stator teeth 112 are connected, that is, the tooth-yoke separated stator core 110 has no slot, so that cogging torque can be greatly reduced.

In addition, it can be understood that when the stator 100 is assembled, the windings 140 are wound on the insulating members 120 in a one-to-one correspondence manner, and then the insulating members 120 are assembled on the stator teeth 112, that is, the insulating members 120 are integral insulating frames, compared with the prior art that the split iron core structure is wound on a single tooth, and the integral insulating frames are adopted for the plug-in frames or the spliced frames, so that the winding is prevented from being loosened after the winding.

In the description of the present specification, the terms "connected," "mounted," "secured," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, 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 this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. 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 is only a preferred embodiment 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 (11)

1. A stator, comprising:

The stator iron core comprises a stator yoke and a plurality of stator teeth connected in the circumferential direction, and the stator yoke is arranged on the radial outer sides of the plurality of stator teeth;

The plurality of insulating pieces comprise a first insulating piece and a second insulating piece, the first insulating piece and the second insulating piece are respectively arranged on two adjacent stator teeth, and a winding groove is formed in one side, away from the stator teeth, of each insulating piece;

The plurality of windings comprise a first winding and a second winding which are different in wire diameter, the first winding is wound in the winding groove of the first insulating piece, and the second winding is wound in the winding groove of the second insulating piece.

2. The stator of claim 1, wherein the stator further comprises:

The adapter plate comprises a star-shaped connecting circuit and a triangle-shaped connecting circuit, wherein the star-shaped connecting circuit is electrically connected with the triangle-shaped connecting circuit, the first winding is electrically connected with the star-shaped connecting circuit, and the second winding is electrically connected with the triangle-shaped connecting circuit.

3. The stator as claimed in claim 2, wherein,

The first insulating piece is provided with two first binding posts, the head end and the tail end of the first winding are respectively wound on the two first binding posts, and the two first binding posts are connected with the adapter plate;

the first insulation piece is provided with a first wiring terminal, the first end and the tail end of the first winding are respectively wound on the first wiring terminal and the second wiring terminal, and the first wiring terminal and the second wiring terminal are connected with the adapter plate;

The distance between the two first binding posts is different from the distance between the two second binding posts.

4. A stator according to claim 3, wherein the adapter plate is provided with a plurality of first connecting holes and a plurality of second connecting holes, each first binding post is arranged at one of the first connecting holes, and each second binding post is arranged at one of the second connecting holes.

5. A stator according to claim 3, wherein at least one of the first insulating member and the second insulating member is further provided with a limiting portion, the limiting portion being disposed at an interval from the first terminal or the second terminal, at least one of the limiting portions being abutted against the adapter plate in an axial direction of the stator core.

6. The stator as claimed in claim 2, wherein,

A positioning groove is further formed in the outer side of at least one insulating piece along the radial direction of the stator core;

The adapter plate is also provided with at least one positioning hole, and each positioning hole is opposite to one positioning groove along the axial direction of the stator core.

7. The stator as claimed in any one of claims 1 to 6 wherein each of the insulators further comprises:

The insulation part is provided with a mounting hole, the stator teeth penetrate through the mounting hole, and the winding groove is formed in one side, away from the mounting hole, of the insulation part;

wherein, along the circumferential direction of the stator core, the minimum value d of the thickness of at least one insulating part satisfies d is less than or equal to 0.3mm.

8. The stator according to any one of claims 1 to 6, wherein each of the insulating members is provided with a plurality of wire-discharge grooves in the radial direction of the stator core, the plurality of wire-discharge grooves being located in the wire-winding grooves, the wire-discharge grooves being adapted to the wire diameters of the windings wound on the insulating members.

9. The stator according to any one of claims 1 to 6, wherein each of the stator teeth includes a tooth portion and a tooth root portion that are connected, a plurality of the tooth root portions being connected in sequence in a circumferential direction of the stator core, the tooth portion being located between the tooth root portion and the stator yoke.

10. A stator according to any one of claims 1 to 6, wherein a side of the stator yoke facing a plurality of the stator teeth is provided with a plurality of spaced apart projections, each of the projections abutting one of the stator teeth.

11. A servo motor comprising a stator as claimed in any one of claims 1 to 10.