Stator and servo motor

Abstract

The invention provides a stator and a servo motor, the stator comprises a stator core, the stator core comprises a stator yoke and a plurality of stator teeth connected along the circumferential direction, and the stator yoke is arranged at the radial outer side of the plurality of stator teeth; the plurality of insulating parts comprise a first insulating part and a second insulating part, the first insulating part and the second insulating part are respectively arranged on two adjacent stator teeth, and one side, deviating from the stator teeth, of each insulating part is provided with a winding groove; 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 part, and the second winding is wound in the winding groove of the second insulating part.

Description

Technical Field

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

[0002] At present, the servo motors in the related art mostly use concentrated winding and star connection schemes for windings, but this form of winding coefficient is low, which in turn limits the power density of the servo motor.

[0003] Moreover, no matter it is a segmented stator or an integral stator, winding slots are formed between adjacent stator teeth in a plurality of stator teeth. The winding slots are all fan-shaped, while the windings are stepped. When the same windings are installed adjacent to each other, some of the space in the slots may be unusable. Summary of the invention

[0004] The embodiments of the present invention are intended to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of an embodiment of the present invention provides a stator.

[0006] A second aspect of an embodiment of the present invention provides a servo motor.

[0007] In view of this, according to a first aspect of an embodiment of the present invention, a stator is provided, the stator comprising: a stator core, the stator core comprising a stator yoke and a plurality of stator teeth connected in a circumferential direction, the stator yoke being arranged on the radially outer side of the plurality of stator teeth; a plurality of insulating members, the plurality of insulating members comprising a first insulating member and a second insulating member, the first insulating member and the second insulating member being respectively arranged on two adjacent stator teeth, and a winding groove is provided on a side of each insulating member away from the stator tooth; a plurality of windings, the plurality of windings comprising a first winding and a second winding with different wire diameters, the first winding being wound in the winding groove of the first insulating member, and the second winding being wound in the winding groove of the second insulating member.

[0008] The stator provided in an embodiment of the present invention includes a stator core, multiple insulating parts and multiple windings. Specifically, the stator core includes a stator yoke and multiple stator teeth. The stator yoke is arranged radially outside the multiple stator teeth, that is, the stator core is a tooth-yoke separated stator core.

[0009] Along the circumferential direction of the stator core, a plurality of stator teeth are connected, that is, the yoke-separated stator core has no slots, thereby significantly reducing the cogging torque.

[0010] It can be understood that an insulating member is provided on each stator tooth. Specifically, the plurality of insulating members include a first insulating member and a second insulating member, and the first insulating member and the second insulating member are respectively provided on two adjacent stator teeth.

[0011] A winding groove is provided on a side of each insulating member facing away from the stator teeth. The multiple windings include a first winding and a second winding. The first winding is wound on the first insulating member, and the second winding is wound on the second insulating member. That is, the first winding is wound in the winding groove of the first insulating member, and the second winding is wound in the winding groove of the second insulating member.

[0012] Since the first insulating member and the second insulating member are respectively arranged on two adjacent stator teeth, that is, the first insulating member and the second insulating member are arranged adjacent to each other, and the first winding is wound in the winding groove of the first insulating member, and the second winding is wound in the winding groove of the second insulating member, that is, a part of the first winding and a part of the second winding are located in the accommodating space formed by the winding groove of the first insulating member and the winding groove of the second insulating member.

[0013] Since the wire diameter of the first winding is different from that of the second winding, the first winding or the second winding with a smaller wire diameter can be wound with more turns in the accommodating space formed by the winding grooves of the first insulating member and the second insulating member. That is, on the basis that the first winding and the second winding are respectively wound in adjacent winding grooves, the first winding or the second winding with a smaller wire diameter can utilize the excess gap in the accommodating space, thereby making full use of the space in the accommodating space, improving the slot fill rate of the stator, and thereby improving the power density of the servo motor having the stator and improving the efficiency of the motor.

[0014] In addition, it can be understood that when assembling the stator, the windings are first wound one by one on the insulating parts, and then the multiple insulating parts are respectively assembled on the stator teeth. That is to say, the insulating parts are an integral insulating frame. Compared with the block core structure in the related technology that is wound on a single tooth and uses a plug-in frame or a spliced ​​frame, an integral insulating frame is used to avoid the winding loosening after winding.

[0015] It is worth noting 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. Alternatively, the wire diameter of the first winding is smaller than the wire diameter of the second winding, which can be set according to actual needs.

[0016] Among them, the wire diameter of the first winding is smaller than the wire diameter of the second winding, and the number of turns of the first winding is greater than the number of turns of the second winding. That is to say, when the first winding and the second winding are respectively wound in the winding slots of the first insulating member and the winding slots of the second insulating member, in the accommodating space formed by the two winding slots, the first winding with a smaller wire diameter is wound with more turns to make full use of the excess gap in the accommodating space and improve the slot fill rate of the stator.

[0017] Optionally, the insulating member is an insulating material with high fluidity.

[0018] Optionally, there are multiple first insulating members, multiple second insulating members, and multiple first insulating members and multiple second insulating members are alternately arranged on multiple stator teeth along the circumferential direction of the stator core, that is, any first insulating member is located between two second insulating members. Thus, multiple first windings and multiple second windings are alternately arranged after being wound respectively. That is, any two adjacent winding slots have first windings and second windings with different wire diameters respectively.

[0019] The first winding and the second winding with different wire diameters are staggeredly distributed in the accommodation space formed by two adjacent winding slots, thereby maximizing the slot fill rate of the stator and further improving the power density of the servo motor.

[0020] In addition, the stator provided by the above technical solution of the present invention also has the following additional technical features:

[0021] In some technical solutions, optionally, the stator also 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 to the star connection circuit, and the second winding is electrically connected to the triangle connection circuit.

[0022] In the technical solution, it is defined that the stator also includes an adapter plate. Specifically, the adapter plate 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 is connected to the star connection circuit, and the second winding is connected to the delta connection circuit. Thus, a star-delta hybrid connection of the first winding and the second winding is achieved.

[0023] It can be understood that when there are multiple first windings and multiple second windings, the multiple first windings are connected to a star connection circuit, and the multiple second windings are connected to a delta connection circuit.

[0024] Since a star-delta hybrid connection circuit is provided in the adapter board, after the adapter board is electrically connected to the two windings, a star-delta hybrid connection of the two windings can be realized. While effectively improving the winding coefficient of the servo motor, the advantages of the circuit in the adapter board are utilized to effectively improve the power density of the servo motor and improve the efficiency of the motor without changing the stator installation process and the cost of the servo motor.

[0025] Optionally, two terminals are arranged on each insulating member, and the head end or tail end of each winding is arranged on two terminals on an insulating member respectively, so as to realize the head-to-tail conduction of each winding. Then, the adapter plate is welded to the plurality of terminals to form a passage.

[0026] Optionally, the adapter board includes a PCB circuit board.

[0027] In some technical schemes, optionally, the first insulating member is provided with two first terminals, the head end and the tail end of the first winding are respectively wound on the two first terminals, and the two first terminals are connected to the adapter plate; the second insulating member is provided with two second terminals, the head end and the tail end of the second winding are respectively wound on the two second terminals, and the two second terminals are connected to the adapter plate; wherein the spacing between the two first terminals is different from the spacing between the two second terminals.

[0028] In this technical solution, it is defined that the first insulating member is provided with two first terminals, and the head end and the tail end of the first winding are respectively wound on the two first terminals to realize the head-to-tail conduction of the first winding, and the two first terminals are connected to the adapter board, thereby realizing the connection of the star-connected circuit of the first winding and the adapter board.

[0029] The second insulating member is provided with two second terminals, and the head end and the tail end of the second winding are respectively wound on the two second terminals to achieve head-to-tail conduction of the second winding, and the two second terminals are connected to the adapter board, thereby achieving connection between the second winding and the triangle connection circuit of the adapter board.

[0030] Since the spacing between the two first terminals on the first insulating member is different from the spacing between the two second terminals on the second insulating member, the adapter plate can be quickly positioned when installing the adapter plate, that is, when connecting the adapter plate to the first terminal and the second terminal, which has an obvious anti-mistake effect, significantly improves the installation efficiency of the adapter plate, and then improves the overall installation efficiency of the stator, reduces assembly costs, and is conducive to mass production.

[0031] Optionally, both the first terminal and the second terminal are conductors.

[0032] In some technical solutions, optionally, a plurality of first connection holes and a plurality of second connection holes are provided on the adapter plate, each first terminal is provided at a first connection hole, and each second terminal is provided at a second connection hole.

[0033] In this technical solution, it is defined that the adapter plate includes multiple first connecting holes and multiple second connecting holes, each first terminal is arranged at a first connecting hole, and each second terminal is arranged at a second connecting hole, thereby realizing the connection between the multiple first terminals and the multiple second terminals and the adapter plate.

[0034] Since the spacing between the two first terminals on the first insulating member is different from the spacing between the two second terminals on the second insulating member, that is, the spacing between the two adjacent first connecting holes on the adapter plate is different from the spacing between the two adjacent second connecting holes, when installing the adapter plate, there is no need for deliberate alignment, and the adapter plate can be quickly assembled with multiple first terminals and multiple second terminals, thereby achieving an anti-foolproof effect.

[0035] In addition, it can be understood that by respectively inserting multiple first terminal posts and multiple second terminal posts into the corresponding first connecting holes and second connecting holes on the adapter plate, the adapter plate can be limited in the circumferential direction of the stator core, thereby ensuring smooth plug-in between the plug-in interface on the adapter plate and the plug-in component on the casing.

[0036] Optionally, when multiple first terminals are respectively inserted into multiple first connecting holes and multiple second terminals are respectively inserted into multiple second connecting holes, welding is performed in each first connecting hole and each second connecting hole to achieve connection between the multiple first terminals and the multiple second terminals and the adapter board.

[0037] 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, which is spaced apart from the first terminal or the second terminal, and along the axial direction of the stator core, at least one limiting portion abuts against the adapter plate.

[0038] 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 both the first insulating member and the second insulating member are provided with a limiting portion. The specific setting can be based on actual needs.

[0039] The limiting part is spaced apart from the first terminal or the second terminal. Specifically, when the first insulating member is provided with the limiting part, the limiting part is spaced apart from the first terminal, and when the second insulating member is provided with the limiting part, the limiting part is spaced apart from the second terminal.

[0040] Along the axial direction of the stator core, at least one limiting portion abuts against the adapter plate, so that when the adapter plate is installed, the adapter plate can be limited in the axial direction. That is, when the adapter plate is installed, when the adapter plate abuts against the limiting portion, it means that the adapter plate is installed in place, thereby effectively improving the installation efficiency of the adapter plate, thereby improving the overall installation efficiency of the stator and reducing assembly costs.

[0041] Moreover, by axially limiting the adapter plate through the limiting part, the installation stability of the adapter plate can be ensured, and the axial movement of the adapter plate can be avoided, that is, the uniqueness of the installation position of the casing and the adapter plate is ensured, thereby achieving smooth plug-in between the plug-in interface on the adapter plate and the plug-in part on the casing, thereby improving the operating stability and reliability of the servo motor with the stator.

[0042] Optionally, a limiting portion is provided on each insulating member, which can further improve the installation efficiency of the adapter plate while ensuring the installation stability of the adapter plate and further preventing the adapter plate from axial movement.

[0043] In some technical solutions, optionally, a positioning groove is further provided 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 a positioning groove along the axial direction of the stator core.

[0044] In this technical solution, it is defined that a positioning groove is provided on the outer side of at least one insulating part along the radial direction of the stator core. It can be understood that when the stator teeth and the stator yoke are assembled, the tooling can be used in conjunction with the positioning groove to ensure the relative position of the stator teeth and the stator yoke during installation, thereby achieving rapid and reliable assembly of the stator yoke and the stator teeth, and thereby improving the assembly efficiency of the stator.

[0045] In addition, after the stator is assembled, when the stator is assembled as a whole to the casing, the tooling and positioning grooves can be used to ensure the relative position between the plug interface on the adapter plate and the connector on the casing, thereby achieving quick plug-in and ensuring smooth installation of the connector.

[0046] Moreover, during the installation of the adapter plate, the adapter plate can be installed and positioned by cooperating with the positioning groove and the positioning hole on the adapter plate, thereby improving the installation efficiency of the adapter plate, thereby improving the overall installation efficiency of the stator and reducing the assembly cost of the stator.

[0047] Optionally, a positioning groove is provided on the radial outer side of each insulating member to improve the positioning effect.

[0048] At least one positioning hole is provided on the adapter plate. Specifically, along the axial direction of the stator core, the positioning hole is opposite to the positioning groove, that is, the installation positioning of the adapter plate is achieved by cooperating with the positioning groove and the positioning hole on the adapter plate, thereby improving the installation efficiency of the adapter plate, thereby improving the overall installation efficiency of the stator and reducing the assembly cost of the stator.

[0049] Optionally, a plurality of positioning holes are provided on the adapter plate, and the plurality of positioning holes are arranged at intervals, and each positioning hole is axially opposite to a positioning groove, so as to realize rapid installation and positioning of the adapter plate, further improve the installation efficiency of the adapter plate, and then improve the overall installation efficiency of the stator, and reduce the assembly cost of the stator.

[0050] In some technical solutions, optionally, each insulating part also includes an insulating part, the insulating part is provided with a mounting hole, the stator teeth pass through the mounting hole, and the winding groove is provided on the side of the insulating part 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≤0.3mm.

[0051] In this technical solution, it is defined that each insulating member also includes an insulating portion. Specifically, the insulating portion is provided with a mounting hole. After multiple windings are respectively wound on multiple insulating members, each stator tooth passes through a mounting hole on an insulating member to achieve assembly of the insulating member and the stator tooth.

[0052] The winding groove is arranged on a side of the insulating part away from the mounting hole, that is, along the circumferential direction of the stator core, the mounting hole is located on the inner side of the insulating part, and the winding groove is located on the outer side of the insulating part.

[0053] Along the circumferential direction of the stator core, the minimum thickness of the insulation part is less than or equal to 0.3mm, that is, the thickness of the thinnest part of the insulation part is less than or equal to 0.3mm, that is, the circumferential thickness of the insulation part is thinned, thereby effectively increasing the space of the winding slot and increasing the number of turns of the winding in the winding slot. Even if the space in the winding slot can be largely utilized, the slot fill rate and the power density of the servo motor are further improved, thereby improving the motor efficiency.

[0054] In some technical solutions, optionally, the stator further includes a pressing piece, which is arranged in the mounting hole and abuts against the stator teeth.

[0055] In this technical solution, it is defined that the stator also includes a clamping piece. Specifically, the clamping piece is arranged in the mounting hole, and the clamping piece is abutted against the stator teeth. Therefore, when the insulating piece after winding the winding is assembled on the stator teeth, the clamping piece abuts against the stator teeth, so that the insulating piece can be reliably assembled on the stator teeth, effectively preventing the insulating piece from falling off the stator teeth during the movement of the stator after the insulating piece is installed, ensuring the stability and reliability of the stator after assembly, and thereby improving the operating stability of the servo motor with the stator.

[0056] Moreover, compared with the related art in which the insulating frame is directly assembled on the stator teeth, it is possible to improve the installation efficiency while achieving reliable assembly of the insulating member and the stator teeth.

[0057] Optionally, the pressing member and the insulating member are an integrated structure. It is understood that the integrated structure has good mechanical properties, thus improving the connection strength between the pressing member and the insulating member and ensuring effective cooperation between the pressing member and the stator teeth. In addition, the integrated structure is also conducive to processing and production, thus reducing the production cost of the stator.

[0058] Optionally, the clamping member includes an elastic member, and when the stator teeth pass through the mounting holes on the insulating member after winding the winding, the stator teeth abut against the elastic member, that is, in the process of the stator teeth passing through the mounting holes, the stator teeth squeeze the elastic member, thereby causing elastic deformation of the elastic member, and the elastic member that has undergone elastic deformation generates an elastic force toward the side where the stator teeth are located, so as to increase the clamping force between the stator teeth and the elastic member, so that the insulating member is firmly assembled on the stator teeth, effectively preventing the insulating member from falling off the stator teeth during the movement of the stator after the insulating member is installed, thereby ensuring the stability and reliability of the stator after assembly, and thereby improving the operating stability of the servo motor with the stator.

[0059] Optionally, the clamping member includes a plurality of ridges, and the plurality of ridges are arranged at intervals in the mounting hole, each ridge extends along the radial direction of the stator core and in the mounting hole, and the plurality of ridges abut against the stator teeth. That is, when the stator teeth pass through the mounting holes on the insulating member after winding the windings, the stator teeth abut against the plurality of ridges. That is, in the process of the stator teeth passing through the mounting holes, the stator teeth squeeze the plurality of ridges, so that the insulating member is firmly assembled on the stator teeth, thereby effectively preventing the insulating member from falling off the stator teeth during the movement of the stator after the insulating member is installed.

[0060] In some technical solutions, optionally, along the radial direction of the stator core, each insulating member is provided with a plurality of wire arrangement grooves, the plurality of wire arrangement grooves are located in the winding grooves, and the wire arrangement grooves are adapted to the wire diameter of the winding wound on the insulating member.

[0061] In this technical solution, it is defined that each insulating member is provided with a plurality of wire arrangement grooves. Specifically, the plurality of wire arrangement grooves on each insulating member are located in the winding groove on the insulating member.

[0062] The wire grooves are adapted to the wire diameters of the windings wound on the insulating component, that is, each winding is adapted to the multiple wire grooves on the insulating component on which it is located, so that after the windings are wound on the multiple wire grooves, the windings can be arranged closely and neatly, and under the same space conditions, the number of turns of the windings can be increased, the slot fill rate can be improved, and the power density of the servo motor with the stator can be improved, thereby improving the motor efficiency.

[0063] In some technical solutions, optionally, at least one wire arrangement slot is provided through-through along the axial direction of the stator core.

[0064] In this technical solution, at least one wire slot is arranged through the axial direction of the stator core, that is, at least one wire slot is axially connected, so that after the winding is wound on multiple wire slots, the winding arrangement can be more compact and neat, further improving the slot fill rate and the power density of the servo motor, thereby improving the motor efficiency.

[0065] Optionally, each wire arrangement slot is connected along the axial direction of the stator core, so as to further arrange the windings more closely and neatly, and further improve the slot fill rate and the power density of the servo motor.

[0066] In some technical solutions, optionally, each stator tooth includes a connected tooth portion and a tooth root portion, and along the circumferential direction of the stator core, multiple tooth root portions are sequentially connected, and the tooth portion is located between the tooth root portion and the stator yoke.

[0067] In this technical solution, it is defined that each stator tooth includes a connected tooth portion and a tooth root portion. Specifically, along the circumferential direction of the stator core, the tooth roots of multiple stator teeth are connected in sequence, and the multiple teeth are respectively located between the multiple tooth roots and the stator yoke.

[0068] Since a plurality of stator teeth are connected along the circumferential direction of the stator core, that is, the yoke-separated stator core has no slots, the cogging torque can be greatly reduced.

[0069] In addition, the stator core is a tooth-yoke separated stator core. When assembling the stator, the windings are first wound one by one on the insulating parts, and then the insulating parts are assembled on the stator teeth. That is to say, the insulating parts are an integral insulating frame. Compared with the block core structure in the related technology that is wound on a single tooth and uses a plug-in frame or a spliced ​​frame, an integral insulating frame is used to avoid the windings from loosening after winding.

[0070] In some technical solutions, optionally, a stator yoke is provided with a plurality of spaced protrusions on one side facing the plurality of stator teeth, and each protrusion abuts against a stator tooth.

[0071] In this technical solution, it is defined that a plurality of spaced protrusions are provided on one side of the stator yoke facing the plurality of stator teeth, and each protrusion abuts against a stator tooth. That is to say, when the stator yoke is integrally mounted on the stator teeth, each protrusion abuts against a stator tooth, thereby realizing the assembly of the stator teeth of the separate stator core and the stator yoke.

[0072] Since the plurality of convex portions are arranged at intervals, there is a concave portion between two adjacent convex portions, so that each concave portion and two adjacent stator teeth provide an accommodating space for the insulating member, that is, the concave portion plays a role in avoiding the insulating member.

[0073] In addition, a recess is formed between two adjacent protrusions on the stator yoke, so that the stator teeth and the stator yoke can be punched together, that is, the stator teeth and the stator yoke are manufactured at one time, thereby improving the production efficiency of the stator and reducing the production cost of the stator.

[0074] According to a second aspect of the present invention, a servo motor is provided, comprising a stator as provided by any of the above technical solutions, thereby having all the beneficial technical effects of the stator, which will not be repeated here.

[0075] Additional aspects and advantages according to the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0077] Figure 1 One of the structural schematic diagrams of a stator according to an embodiment of the present invention is shown;

[0078] Figure 2Shows Figure 1 An enlarged view of the stator of the illustrated embodiment at position A;

[0079] Figure 3 A second structural schematic diagram of a stator according to an embodiment of the present invention is shown;

[0080] Figure 4 A third structural schematic diagram of a stator according to an embodiment of the present invention is shown;

[0081] Figure 5 One of the structural schematic diagrams of an insulating member according to an embodiment of the present invention is shown;

[0082] Figure 6 A second structural schematic diagram of an insulating member according to an embodiment of the present invention is shown;

[0083] Figure 7 A fourth structural schematic diagram of a stator according to an embodiment of the present invention is shown.

[0084] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0085] 100 stator, 110 stator core, 111 stator yoke, 112 stator teeth, 120 insulating member, 121 winding groove, 122 insulating portion, 123 mounting hole, 140 winding, 141 first winding, 142 second winding, 150 adapter plate, 151 positioning hole, 152 first connecting hole, 153 second connecting hole, 160 first terminal, 170 second terminal, 180 limiting portion, 190 positioning groove, 210 pressing member, 220 wiring groove, 230 tooth portion, 240 tooth root portion, 250 protrusion, 260 recess, 270 first insulating member, 280 second insulating member. DETAILED DESCRIPTION

[0086] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0087] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0088] Refer to the following Figures 1 to 7 The stator 100 and the servo motor provided according to some embodiments of the present invention are described.

[0089] In one embodiment according to the present application, Figure 1 and Figure 2 As shown, a stator 100 is proposed, and the stator 100 includes: a stator core 110, the stator core 110 includes a stator yoke 111 and a plurality of stator teeth 112 connected in the circumferential direction, and the stator yoke 111 is arranged on the radial outside of the plurality of stator teeth 112; a plurality of insulating members 120, the plurality of insulating members 120 include a first insulating member 270 and a second insulating member 280, the first insulating member 270 and the second insulating member 280 are respectively arranged on two adjacent stator teeth 112, and a winding groove 121 is provided on a side of each insulating member 120 away from the stator tooth 112; a plurality of windings 140, the plurality of windings 140 include a first winding 141 and a second winding 142 with different wire diameters, the first winding 141 is wound in the winding groove 121 of the first insulating member 270, and the second winding 142 is wound in the winding groove 121 of the second insulating member 280.

[0090] The stator 100 provided in the embodiment of the present invention includes a stator core 110, a plurality of insulating parts 120 and a plurality of windings 140. Specifically, the stator core 110 includes a stator yoke 111 and a plurality of stator teeth 112. The stator yoke 111 is arranged radially outside the plurality of stator teeth 112. That is, the stator core 110 is a tooth-yoke separated stator core 110.

[0091] Along the circumferential direction of the stator core 110 , a plurality of stator teeth 112 are connected, that is, the yoke-separated stator core 110 has no notches, thereby being able to significantly reduce the cogging torque.

[0092] It is understandable that an insulating member 120 is disposed on each stator tooth 112 . Specifically, the plurality of insulating members 120 include a first insulating member 270 and a second insulating member 280 . The first insulating member 270 and the second insulating member 280 are respectively disposed on two adjacent stator teeth 112 .

[0093] A winding groove 121 is provided on the side of each insulating member 120 facing away from the stator tooth 112, and the multiple windings 140 include a first winding 141 and a second winding 142. The first winding 141 is wound on the first insulating member 270, and the second winding 142 is wound on the second insulating member 280. That is, the first winding 141 is wound in the winding groove 121 of the first insulating member 270, and the second winding 142 is wound in the winding groove 121 of the second insulating member 280.

[0094] Since the first insulating member 270 and the second insulating member 280 are respectively arranged on two adjacent stator teeth 112, that is, the first insulating member 270 and the second insulating member 280 are arranged adjacent to each other, and the first winding 141 is wound in the winding groove 121 of the first insulating member 270, and the second winding 142 is wound in the winding groove 121 of the second insulating member 280, that is, a part of the first winding 141 and a part of the second winding 142 are located in the accommodating space formed by the winding groove 121 of the first insulating member 270 and the winding groove 121 of the second insulating member 280.

[0095] Since the wire diameter of the first winding 141 is different from the wire diameter of the second winding 142, the first winding 141 or the second winding 142 with a smaller wire diameter can be wound with more turns in the accommodating space formed by the winding groove 121 of the first insulating member 270 and the winding groove 121 of the second insulating member 280. That is, on the basis that the first winding 141 and the second winding 142 are respectively wound in adjacent winding grooves 121, the first winding 141 or the second winding 142 with a smaller wire diameter can utilize the excess gap in the accommodating space, thereby fully utilizing the space in the accommodating space, improving the slot fill rate of the stator 100, and further improving the power density of the servo motor having the stator 100, thereby improving the efficiency of the motor.

[0096] In addition, it can be understood that when assembling the stator 100, the windings 140 are first wound one by one on the insulating parts 120, and then the multiple insulating parts 120 are respectively assembled on the stator teeth 112. That is to say, the insulating parts 120 are an integral insulating frame. Compared with the block-type core structure in the related art that is wound on a single tooth and uses a plug-in frame or a spliced ​​frame, an integral insulating frame is used to avoid the winding from loosening after winding.

[0097] It is worth noting 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. Alternatively, the wire diameter of the first winding 141 is smaller than the wire diameter of the second winding 142, which can be set according to actual needs.

[0098] Among them, 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 greater than the number of turns of the second winding 142. That is to say, when the first winding 141 and the second winding 142 are respectively wound in the winding groove 121 of the first insulating member 270 and the winding groove 121 of the second insulating member 280, in the accommodating space formed by the two winding grooves 121, the first winding 141 with a smaller wire diameter is wound with more turns to make full use of the excess gap in the accommodating space and improve the slot fill rate of the stator 100.

[0099] Optionally, the insulating member 120 is an insulating material with high fluidity.

[0100] Optionally, there are multiple first insulating members 270, multiple second insulating members 280, and multiple first insulating members 270 and multiple second insulating members 280 are alternately arranged on multiple stator teeth 112 along the circumferential direction of the stator core 110, that is, any first insulating member 270 is located between two second insulating members 280. Thus, multiple first windings 141 and multiple second windings 142 are alternately arranged after being wound respectively. That is, any two adjacent winding slots 121 have first windings 141 and second windings 142 with different wire diameters.

[0101] The first winding 141 and the second winding 142 with different wire diameters are staggeredly distributed in the accommodation space formed by two adjacent winding slots 121, thereby maximizing the slot fill rate of the stator 100 and further improving the power density of the servo motor.

[0102] like Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, optionally, the stator 100 also includes an adapter plate 150, the adapter plate 150 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 141 is electrically connected to the star connection circuit, and the second winding 142 is electrically connected to the triangle connection circuit.

[0103] 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. Thus, a star-delta hybrid connection of the first winding 141 and the second winding 142 is achieved.

[0104] It can be understood that when there are multiple first windings 141 and multiple second windings 142, the multiple first windings 141 are connected to a star connection circuit, and the multiple second windings 142 are connected to a delta connection circuit.

[0105] Since a star-delta hybrid connection circuit is provided in the adapter board 150, after the adapter board 150 is electrically connected to the two windings, a star-delta hybrid connection of the two windings can be realized. While effectively improving the winding coefficient of the servo motor, the advantages of the circuit in the adapter board 150 are utilized to effectively improve the power density of the servo motor and improve the efficiency of the motor without changing the stator 100 installation process and the cost of the servo motor.

[0106] Optionally, each insulating member 120 is provided with two terminals, and the head end or tail end of each winding 140 is respectively provided on two terminals on an insulating member 120, so as to realize the head-to-tail conduction of each winding 140. Then, the adapter plate 150 is welded to the plurality of terminals to form a passage.

[0107] Optionally, the adapter board 150 includes a PCB circuit board.

[0108] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in some embodiments, optionally, the first insulating member 270 is provided with two first terminals 160, the head end and the tail end of the first winding 141 are respectively wound on the two first terminals 160, and the two first terminals 160 are connected to the adapter plate 150; the second insulating member 280 is provided with two second terminals 170, the head end and the tail end of the second winding 142 are respectively wound on the two second terminals 170, and the two second terminals 170 are connected to the adapter plate 150; wherein, the spacing between the two first terminals 160 is different from the spacing between the two second terminals 170.

[0109] In this embodiment, it is defined that the first insulating member 270 is provided with two first terminals 160, and the head end and the tail end of the first winding 141 are respectively wound on the two first terminals 160 to achieve head-to-tail conduction of the first winding 141, and the two first terminals 160 are connected to the adapter board 150, thereby realizing the connection of the star connection circuit of the first winding 141 and the adapter board 150.

[0110] The second insulating member 280 is provided with two second terminals 170, and the head end and the tail end of the second winding 142 are respectively wound on the two second terminals 170 to achieve head-to-tail conduction of the second winding 142, and the two second terminals 170 are connected to the adapter board 150, thereby realizing the connection of the triangle connection circuit of the second winding 142 and the adapter board 150.

[0111] Since the spacing between the two first terminals 160 on the first insulating member 270 is different from the spacing between the two second terminals 170 on the second insulating member 280, when installing the adapter plate 150, that is, when connecting the adapter plate 150 with the first terminals 160 and the second terminals 170, the adapter plate 150 can be quickly positioned, which has an obvious anti-mistake effect, significantly improves the installation efficiency of the adapter plate 150, and then improves the overall installation efficiency of the stator 100, reduces assembly costs, and is conducive to mass production.

[0112] Optionally, the first terminal 160 and the second terminal 170 are both conductors.

[0113] like Figure 3 and Figure 4 As shown, in some embodiments, optionally, a plurality of first connection holes 152 and a plurality of second connection holes 153 are provided on the adapter plate 150 , each first terminal 160 is provided at a first connection hole 152 , and each second terminal 170 is provided at a second connection hole 153 .

[0114] 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 first terminal 160 is disposed at a first connection hole 152, and each second terminal 170 is disposed at a second connection hole 153, thereby realizing connection between the plurality of first terminals 160 and the plurality of second terminals 170 and the adapter plate 150.

[0115] Since the spacing between the two first terminals 160 on the first insulating member 270 is different from the spacing between the two second terminals 170 on the second insulating member 280, that is, the spacing between the two adjacent first connecting holes 152 on the adapter plate 150 is different from the spacing between the two adjacent second connecting holes 153, when installing the adapter plate 150, there is no need to deliberately align the adapter plate 150, and the adapter plate 150 and the multiple first terminals 160 and the multiple second terminals 170 can be quickly assembled to achieve an anti-foolproof effect.

[0116] In addition, it can be understood that by respectively inserting a plurality of first terminals 160 and a plurality of second terminals 170 into the corresponding first connection holes 152 and second connection holes 153 on the adapter plate 150, the adapter plate 150 can be limited in the circumferential direction of the stator core 110, thereby ensuring smooth connection between the plug-in interface on the adapter plate 150 and the connector on the casing.

[0117] Optionally, when multiple first connecting posts 160 are respectively inserted into multiple first connecting holes 152 and multiple second connecting posts 170 are respectively inserted into multiple second connecting holes 153, welding is performed in each first connecting hole 152 and each second connecting hole 153 to achieve connection between the multiple first connecting posts 160 and the multiple second connecting posts 170 and the adapter board 150.

[0118] like Figure 4 , Figure 6 and Figure 7 As shown, in some embodiments, optionally, at least one of the first insulating member 270 and the second insulating member 280 is also provided with a limit portion 180, and the limit portion 180 is spaced apart from the first terminal 160 or the second terminal 170, and along the axial direction of the stator core 110, at least one limit portion 180 is against the adapter plate 150.

[0119] 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 limiting portion 180. Specifically, the first insulating member 270 is provided with a limiting portion 180, or the second insulating member 280 is provided with a limiting portion 180. Alternatively, both the first insulating member 270 and the second insulating member 280 are provided with a limiting portion 180. The specific configuration can be based on actual needs.

[0120] The limiting portion 180 is spaced apart from the first terminal 160 or the second terminal 170. Specifically, when the limiting portion 180 is disposed on the first insulating member 270, the limiting portion 180 is spaced apart from the first terminal 160, and when the limiting portion 180 is disposed on the second insulating member 280, the limiting portion 180 is spaced apart from the second terminal 170.

[0121] Along the axial direction of the stator core 110, 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, that is, when the adapter plate 150 is installed, when the adapter plate 150 abuts against the limiting portion 180, it means that the adapter plate 150 is installed in place, thereby effectively improving the installation efficiency of the adapter plate 150, thereby improving the overall installation efficiency of the stator 100 and reducing the assembly cost.

[0122] Moreover, by axially limiting the adapter plate 150 through the limiting portion 180, the installation stability of the adapter plate 150 can be ensured, and the axial movement of the adapter plate 150 can be avoided, that is, the uniqueness of the installation position of the housing and the adapter plate 150 is ensured, thereby achieving smooth connection between the plug interface on the adapter plate 150 and the plug-in on the housing, thereby improving the operating stability and reliability of the servo motor with the stator 100.

[0123] Optionally, a limiting portion 180 is provided on each insulating member 120 , which can further improve the installation efficiency of the adapter plate 150 while ensuring the installation stability of the adapter plate 150 and further preventing the adapter plate 150 from axial movement.

[0124] like Figure 4 and Figure 6 As shown, in some embodiments, optionally, along the radial direction of the stator core 110, a positioning groove 190 is further provided on the outer side of at least one insulating member 120; the adapter plate 150 is provided with at least one positioning hole 151, and along the axial direction of the stator core 110, each positioning hole 151 is opposite to a positioning groove 190.

[0125] In this embodiment, it is defined that along the radial direction of the stator core 110, a positioning groove 190 is further provided on the outer side of at least one insulating part 120. It can be understood that when the stator teeth 112 and the stator yoke 111 are assembled, the tooling can be used to cooperate with the positioning groove 190, so as to ensure the relative position of the stator teeth 112 and the stator yoke 111 during installation, and realize the rapid and reliable assembly of the stator yoke 111 and the stator teeth 112, thereby improving the assembly efficiency of the stator 100.

[0126] In addition, after the stator 100 is assembled, when the stator 100 is assembled as a whole to the casing, the tooling can be used in conjunction with the positioning groove 190 to ensure the relative position between the plug interface on the adapter plate 150 and the connector on the casing, thereby achieving quick plug-in and ensuring smooth installation of the connector.

[0127] Moreover, during the installation of the adapter plate 150, the installation positioning of the adapter plate 150 can be achieved by cooperating with the positioning groove 190 and the positioning hole 151 on the adapter plate 150, thereby improving the installation efficiency of the adapter plate 150, thereby improving the overall installation efficiency of the stator 100 and reducing the assembly cost of the stator 100.

[0128] Optionally, a positioning groove 190 is provided on the radial outer side of each insulating member 120 to improve the positioning effect.

[0129] At least one positioning hole 151 is provided on the adapter plate 150. Specifically, along the axial direction of the stator core 110, the positioning hole 151 is opposite to the positioning groove 190, that is, the installation positioning of the adapter plate 150 is achieved by matching the positioning groove 190 with the positioning hole 151 on the adapter plate 150, thereby improving the installation efficiency of the adapter plate 150, thereby improving the overall installation efficiency of the stator 100 and reducing the assembly cost of the stator 100.

[0130] Optionally, a plurality of positioning holes 151 are provided on the adapter plate 150, and the plurality of positioning holes 151 are arranged at intervals, and each positioning hole 151 is axially opposite to a positioning groove 190, thereby realizing rapid installation and positioning of the adapter plate 150, further improving the installation efficiency of the adapter plate 150, and further improving the overall installation efficiency of the stator 100, thereby reducing the assembly cost of the stator 100.

[0131] like Figure 5 As shown, in some embodiments, optionally, each insulating member 120 also 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 winding groove 121 is provided on the side of the insulating portion 122 away from the mounting hole 123; wherein, along the circumferential direction of the stator core 110, the minimum value d of the thickness of at least one insulating portion 122 satisfies d≤0.3mm.

[0132] In this embodiment, it is defined that each insulating member 120 also includes an insulating portion 122. Specifically, the insulating portion 122 is provided with a mounting hole 123. After the plurality of windings 140 are respectively wound on the plurality of insulating members 120, each stator tooth 112 passes through a mounting hole 123 on an insulating member 120 to realize the assembly of the insulating member 120 and the stator tooth 112.

[0133] The winding groove 121 is arranged on a side of the insulating portion 122 away from the mounting hole 123 , that is, along the circumferential direction of the stator core 110 , the mounting hole 123 is located on the inner side of the insulating member 120 , and the winding groove 121 is located on the outer side of the insulating member 120 .

[0134] Along the circumferential direction of the stator core 110, the minimum thickness of the insulating part 122 is less than or equal to 0.3 mm, that is, the thickness of the thinnest part of the insulating part 122 is less than or equal to 0.3 mm, that is, the circumferential thickness of the insulating part 122 is thinned, thereby effectively increasing the space of the winding slot 121 and increasing the number of turns of the winding 140 in the winding slot 121. Even if the space in the winding slot 121 can be largely utilized, the slot fill rate and the power density of the servo motor are further improved, thereby improving the motor efficiency.

[0135] like Figure 5 and Figure 6 As shown, in some embodiments, optionally, the stator 100 further includes a pressing member 210 , which is disposed in the mounting hole 123 and abuts against the stator teeth 112 .

[0136] In this embodiment, it is defined that the stator 100 also includes a clamping piece 210. Specifically, the clamping piece 210 is arranged in the mounting hole 123, and the clamping piece 210 abuts against the stator teeth 112. Therefore, when the insulating piece 120 after the winding 140 is wound is assembled on the stator teeth 112, the clamping piece 210 abuts against the stator teeth 112. Therefore, the insulating piece 120 can be reliably assembled on the stator teeth 112, and the problem of the insulating piece 120 falling off from the stator teeth 112 during the movement of the stator 100 after the insulating piece 120 is installed is effectively prevented, thereby ensuring the stability and reliability of the stator 100 after assembly, and further improving the operating stability of the servo motor having the stator 100.

[0137] Moreover, compared with the related art in which the insulating frame is directly assembled on the stator teeth 112 , it is possible to improve the installation efficiency while achieving reliable assembly of the insulating member 120 and the stator teeth 112 .

[0138] Optionally, the pressing member 210 and the insulating member 120 are an integrated structure. It is understood that the integrated structure has good mechanical properties, and thus can improve the connection strength between the pressing member 210 and the insulating member 120, and ensure the effective cooperation between the pressing member 210 and the stator teeth 112. In addition, the integrated structure is also conducive to processing and production, and thus can reduce the production cost of the stator 100.

[0139] Optionally, the clamping member 210 includes an elastic member, and when the stator tooth 112 passes through the mounting hole 123 on the insulating member 120 after the winding 140 is wound, the stator tooth 112 is abutted against the elastic member, that is, in the process of the stator tooth 112 passing through the mounting hole 123, the stator tooth 112 squeezes the elastic member, thereby causing the elastic member to undergo elastic deformation, and the elastic member that undergoes elastic deformation generates an elastic force toward the side where the stator tooth 112 is located, so as to increase the clamping force between the stator tooth 112 and the elastic member, so that the insulating member 120 is firmly assembled on the stator tooth 112, effectively preventing the insulating member 120 from falling off the stator tooth 112 during the movement of the stator 100 after the insulating member 120 is installed, thereby ensuring the stability and reliability of the stator 100 after assembly, and thereby improving the operating stability of the servo motor having the stator 100.

[0140] Optionally, the clamping member 210 includes a plurality of ridges, and the plurality of ridges are arranged at intervals in the mounting hole 123, each ridge extends along the radial direction of the stator core 110 and in the mounting hole 123, and the plurality of ridges abut against the stator teeth 112, that is, when the stator teeth 112 pass through the mounting holes 123 on the insulating member 120 after the windings 140 are wound, the stator teeth 112 abut against the plurality of ridges, that is, in the process of the stator teeth 112 passing through the mounting holes 123, the stator teeth 112 squeeze the plurality of ridges, so that the insulating member 120 is firmly assembled on the stator teeth 112, thereby effectively preventing the insulating member 120 from falling off the stator teeth 112 during the movement of the stator 100 after the insulating member 120 is installed.

[0141] In some embodiments, optionally, the stator 100 further includes a limiting boss, which is disposed in the mounting hole 123 and spaced apart from the clamping member 210 , and along the axial direction of the stator core 110 , the limiting boss abuts against the stator teeth 112 .

[0142] In this embodiment, it is defined that the stator 100 also includes a limiting boss. Specifically, the limiting boss is arranged in the mounting hole 123, and along the axial direction of the stator core 110, the limiting boss abuts against the stator tooth 112. That is to say, when the stator tooth 112 passes through the mounting hole 123 on the insulating part 120 after the winding 140 is wound, the stator tooth 112 abuts against the limiting boss in the axial direction.

[0143] It is understandable that the four corners in the mounting hole 123 are all rounded. 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.

[0144] By arranging a limiting boss in the mounting hole 123 and making the stator teeth 112 abut against the limiting boss in the axial direction, a certain gap is created between the stator teeth 112 and the inner wall of the mounting hole 123, thereby effectively preventing the stator teeth 112 from damaging the structure of the insulating part 120 when assembling the insulating part 120 and the stator teeth 112, further extending the service life of the insulating part 120 and ensuring the reliable operation of the servo motor with the stator 100.

[0145] Optionally, along the axial direction of the stator core 110 , there are two limiting bosses, which are respectively located on both 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 .

[0146] In some embodiments, optionally, at least one insulating member 120 has an end facing away from the adapter plate 150 provided with a chamfer.

[0147] In this embodiment, at least one end of the insulator 120 facing away from the adapter plate 150 is chamfered. It is understood that when the stator yoke 111 is assembled, the side of the insulator 120 with the chamfer passes through the stator yoke 111, so that the stator yoke 111 is assembled on the stator teeth 112.

[0148] By setting a chamfer on the side of at least one insulating part 120 facing away from the adapter plate 150, the wear of the insulating part 120 can be effectively reduced during the assembly of the stator yoke 111, that is, the stator yoke 111 can be prevented from gnawing at the insulating part 120, thereby extending the service life of the insulating part 120 and ensuring reliable assembly of the stator yoke 111 and the stator teeth 112.

[0149] Optionally, one end of each insulating member 120 facing away from the adapter plate 150 is provided with a chamfer to further reduce the wear of the insulating member 120 , extend the service life of the insulating member 120 , and ensure reliable assembly of the stator yoke 111 and the stator teeth 112 .

[0150] Optionally, at least one insulating member 120 is symmetrically provided with chamfers on both sides.

[0151] like Figure 2 and Figure 5 As shown, in some embodiments, optionally, along the radial direction of the stator core 110, each insulating member 120 is provided with a plurality of wire arrangement grooves 220, and the plurality of wire arrangement grooves 220 are located in the winding grooves 121, and the wire arrangement grooves 220 are adapted to the wire diameter of the winding 140 wound on the insulating member 120.

[0152] In this embodiment, it is defined that each insulating member 120 is provided with a plurality of wire arrangement grooves 220 . Specifically, the plurality of wire arrangement grooves 220 on each insulating member 120 are located in the winding groove 121 on the insulating member 120 .

[0153] The wire arrangement groove 220 is adapted to the wire diameter of the winding 140 wound on the insulating member 120, that is, each winding 140 is adapted to the multiple wire arrangement grooves 220 on the insulating member 120 where it is located, so that after the winding 140 is wound on the multiple wire arrangement grooves 220, the windings can be arranged closely and neatly. Under the condition of the same space, the number of turns of the winding 140 can be increased, the slot fill rate can be improved, and then the power density of the servo motor with the stator 100 can be improved, thereby improving the motor efficiency.

[0154] In some embodiments, optionally, at least one wire arrangement slot 220 is disposed through the stator core 110 in the axial direction.

[0155] In this embodiment, at least one wire slot 220 is arranged through the axial direction of the stator core 110, that is, at least one wire slot 220 is axially connected, so that after the winding 140 is wound on multiple wire slots 220, the winding arrangement can be more compact and neat, further improving the slot fill rate and the power density of the servo motor, thereby improving the motor efficiency.

[0156] Optionally, each wire arrangement slot 220 is connected along the axial direction of the stator core 110, so as to further arrange the windings more closely and neatly, thereby further improving the slot fill rate and the power density of the servo motor.

[0157] like Figure 1 and Figure 2 As shown, in some embodiments, optionally, each stator tooth 112 includes a connected tooth portion 230 and a tooth root portion 240 , and along the circumferential direction of the stator core 110 , multiple tooth root portions 240 are connected in sequence, and the tooth portion 230 is located between the tooth root portion 240 and the stator yoke 111 .

[0158] In this embodiment, it is defined that each stator tooth 112 includes a connected tooth portion 230 and a tooth root portion 240. Specifically, along the circumferential direction of the stator core 110, the tooth root portions 240 of a 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.

[0159] Since a plurality of stator teeth 112 are connected along the circumferential direction of the stator core 110 , that is, the yoke-separated stator core 110 has no notches, the cogging torque can be greatly reduced.

[0160] In addition, the stator core 110 is a tooth-yoke separated stator core 110. When assembling the stator 100, the windings 140 are first wound one by one on the insulating member 120, and then the insulating member 120 is assembled on the stator teeth 112. That is to say, the insulating member 120 is an integral insulating frame. Compared with the related art in which the block core structure is wound on a single tooth and uses a plug-in frame or a spliced ​​frame, an integral insulating frame is used to prevent the winding from loosening after winding.

[0161] like Figure 2 As shown, in some embodiments, optionally, a plurality of spaced protrusions 250 are provided on one side of the stator yoke 111 facing the plurality of stator teeth 112 , and each protrusion 250 abuts against one stator tooth 112 .

[0162] In this embodiment, a plurality of spaced protrusions 250 are provided on one side of the stator yoke 111 facing the plurality of stator teeth 112, and each protrusion 250 abuts against a stator tooth 112. That is, when the stator yoke 111 is integrally mounted on the stator teeth 112, each protrusion 250 abuts against a stator tooth 112, thereby realizing the assembly of the stator teeth 112 of the separate stator core 110 and the stator yoke 111.

[0163] Since the plurality of protrusions 250 are arranged at intervals, there is a recess 260 between two adjacent protrusions 250 , so that each recess 260 and two adjacent stator teeth 112 provide an accommodating space for the insulating member 120 , that is, the recess 260 serves to avoid the insulating member 120 .

[0164] In addition, a recess 260 is formed between two adjacent protrusions 250 on the stator yoke 111, so that the stator teeth 112 and the stator yoke 111 can be punched together, that is, the stator teeth 112 and the stator yoke 111 are manufactured at one time, thereby improving the production efficiency of the stator 100 and reducing the production cost of the stator 100.

[0165] According to a second aspect of the present invention, a servo motor is provided, comprising a stator 100 as provided in any of the above embodiments, and thus having all the beneficial technical effects of the stator 100, which will not be described in detail herein.

[0166] Specifically, the stator 100 includes a stator core 110, multiple insulating parts 120 and multiple windings 140. Specifically, the stator core 110 includes a stator yoke 111 and multiple stator teeth 112. The stator yoke 111 is arranged radially outside the multiple stator teeth 112. That is, the stator core 110 is a tooth-yoke separated stator core 110.

[0167] Along the circumferential direction of the stator core 110 , a plurality of stator teeth 112 are connected, that is, the yoke-separated stator core 110 has no notches, thereby being able to significantly reduce the cogging torque.

[0168] In addition, it can be understood that when assembling the stator 100, the windings 140 are first wound one by one on the insulating member 120, and then the insulating member 120 is assembled on the stator teeth 112. That is, the insulating member 120 is an integral insulating frame. Compared with the block-type core structure in the related art that is wound on a single tooth and uses a plug-in frame or a spliced ​​frame, an integral insulating frame is used to avoid the winding from loosening after winding.

[0169] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0170] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0171] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stator, characterized in that: include: A stator core, the stator core comprising a stator yoke and a plurality of stator teeth connected in a circumferential direction, the stator yoke being arranged radially outside the plurality of stator teeth; A plurality of insulating members, the plurality of insulating members comprising a first insulating member and a second insulating member, the first insulating member and the second insulating member are respectively arranged on two adjacent stator teeth, and a winding groove is arranged on a side of each insulating member away from the stator tooth; A plurality of windings, wherein the plurality of windings include a first winding and a second winding with different wire diameters, wherein the first winding is wound in the winding groove of the first insulating member, and the second winding is wound in the winding groove of the second insulating member.

2. The stator according to claim 1, characterized in that: The stator also includes: An adapter board, the adapter board 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 is electrically connected to the star connection circuit, and the second winding is electrically connected to the delta connection circuit.

3. The stator according to claim 2, characterized in that: The first insulating member is provided with two first binding posts, the head end and the tail end of the first winding are respectively wound around the two first binding posts, and the two first binding posts are connected to the adapter plate; The second insulating member is provided with two second binding posts, the head end and the tail end of the second winding are respectively wound around the two second binding posts, and the two second binding posts are connected to the adapter plate; Wherein, the distance between two of the first binding posts is different from the distance between two of the second binding posts.

4. The stator according to claim 3, characterized in that: The adapter plate is provided with a plurality of first connection holes and a plurality of second connection holes, each of the first binding posts is provided at one of the first connection holes, and each of the second binding posts is provided at one of the second connection holes.

5. The stator according to claim 3, characterized in that: At least one of the first insulating member and the second insulating member is further provided with a limiting portion, and the limiting portion is spaced apart from the first terminal or the second terminal, and along the axial direction of the stator core, at least one of the limiting portions abuts against the adapter plate.

6. The stator according to claim 2, characterized in that: A positioning groove is further provided on the outer side of at least one of the insulating members along the radial direction of the stator core; The adapter plate is further provided with at least one positioning hole, and along the axial direction of the stator core, each positioning hole is opposite to one positioning groove.

7. The stator according to any one of claims 1 to 6, characterized in that: Each of the insulating members further comprises: An insulating part, wherein the insulating part is provided with a mounting hole, the stator teeth pass through the mounting hole, and the winding slot is provided on a side of the insulating part away from the mounting hole; Wherein, along the circumferential direction of the stator core, a minimum value d of the thickness of at least one of the insulating parts satisfies d≤0.3 mm.

8. The stator according to any one of claims 1 to 6, characterized in that: Along the radial direction of the stator core, each of the insulating members is provided with a plurality of wire arrangement grooves, the plurality of wire arrangement grooves are located in the winding grooves, and the wire arrangement grooves are adapted to the wire diameter of the winding wound on the insulating member.

9. The stator according to any one of claims 1 to 6, characterized in that: Each of the stator teeth includes a connected tooth portion and a tooth root portion. Along the circumferential direction of the stator core, a plurality of the tooth root portions are sequentially connected, and the tooth portion is located between the tooth root portion and the stator yoke.

10. The stator according to any one of claims 1 to 6, characterized in that: The stator yoke is provided with a plurality of spaced protrusions on one side facing the plurality of stator teeth, and each of the protrusions abuts against one of the stator teeth.

11. A servo motor, characterized in that: Comprising the stator according to any one of claims 1 to 10.

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