CN112003395A - Permanent magnet frequency conversion integrated motor - Google Patents
Permanent magnet frequency conversion integrated motor Download PDFInfo
- Publication number
- CN112003395A CN112003395A CN202010857266.3A CN202010857266A CN112003395A CN 112003395 A CN112003395 A CN 112003395A CN 202010857266 A CN202010857266 A CN 202010857266A CN 112003395 A CN112003395 A CN 112003395A
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- arc
- permanent magnet
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- rotor
- welding
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a permanent magnet frequency conversion integrated motor, which comprises: the stator comprises a shell, a stator and a rotor, wherein the front end surface and the rear end surface of the shell are respectively provided with a mounting port; the stator comprises a stator core and a plurality of windings, and the windings are arranged on the stator core; the rotor comprises a rotating shaft, a rotor iron core, a permanent magnet, a first shaft seat, a second shaft seat and a mounting bracket, wherein the mounting bracket is provided with a shaft hole, the rotating shaft is mounted in the shaft hole, the rotor iron core is of a sleeve structure and is sleeved outside the mounting bracket, one end of the rotating shaft is inserted on the first shaft seat, and the other end of the rotating shaft is inserted on the second shaft seat; wherein the first shaft seat is arranged in the mounting opening on the front end surface of the shell, and the second shaft seat is arranged in the mounting opening on the rear end surface of the shell. The use reliability of the permanent magnet frequency conversion integrated motor is improved.
Description
Technical Field
The invention relates to a motor, in particular to a permanent magnet and variable frequency integrated motor.
Background
The motor is a common electric appliance part in industrial production, wherein the permanent magnet frequency conversion all-in-one machine is widely applied to the industrial production due to high efficiency and small volume. The permanent magnet frequency conversion all-in-one machine generally comprises a stator and a rotor, wherein a winding coil is arranged on the stator, and a permanent magnet is arranged on the rotor. In the prior art, a rotor core of a rotor is generally of a solid structure, so that the permanent magnet frequency conversion integrated machine is heavy; meanwhile, the winding wound on the stator core in the stator is easy to fall off after long-time use; the invention aims to solve the technical problem of how to design a permanent magnet frequency conversion all-in-one machine which is light in weight and high in use reliability.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a permanent magnetism frequency conversion integral type motor realizes improving the use reliability of permanent magnetism frequency conversion integral type motor.
The technical scheme provided by the invention is that a permanent magnet and frequency conversion integrated motor comprises: the water cooling device comprises a shell, a stator, a rotor, a frequency conversion module and a water cooling plate, wherein the stator and the rotor are arranged in the shell, the rotor is inserted into the stator, and the water cooling plate is arranged between the frequency conversion module and the shell;
the front end surface and the rear end surface of the shell are respectively provided with a mounting port;
the stator comprises a stator core and a plurality of windings, and the windings are arranged on the stator core;
the rotor comprises a rotating shaft, a rotor iron core, a permanent magnet, a first shaft seat, a second shaft seat and a mounting bracket, wherein the mounting bracket is provided with a shaft hole, the rotating shaft is mounted in the shaft hole, the rotor iron core is of a sleeve structure and is sleeved outside the mounting bracket, one end of the rotating shaft is inserted on the first shaft seat, and the other end of the rotating shaft is inserted on the second shaft seat;
wherein the first shaft seat is arranged in the mounting opening on the front end surface of the shell, and the second shaft seat is arranged in the mounting opening on the rear end surface of the shell.
Further, the mounting bracket comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved outside the inner cylinder, a supporting plate is arranged between the outer cylinder and the inner cylinder, and the shaft hole is formed in the inner cylinder.
Furthermore, the supporting plate comprises an annular plate and a rib plate, the annular plate is sleeved on the inner cylinder and is arranged between the inner cylinder and the outer cylinder, and the rib plate extends along the axis of the inner cylinder and is arranged between the inner cylinder and the outer cylinder.
Furthermore, a mounting groove is formed in the first shaft seat, and a rotary encoder used for detecting the rotating speed of the rotating shaft is arranged in the mounting groove.
Further, the stator core includes:
the multi-layer first punching sheet is integrally in a circular ring structure and comprises a plurality of first arc-shaped sheets which are sequentially connected together, a plurality of tooth structures are formed on the inner edge of each first arc-shaped sheet, a plurality of fastening holes are further formed in each first arc-shaped sheet, and the plurality of layers of first punching sheets are sequentially stacked together;
the two end parts of the stud bolts are respectively in threaded connection with fastening nuts;
the first arc-shaped pieces in one layer of the first punching sheet and the two first arc-shaped pieces in the other layer of the first punching sheet which are butted together are attached together, the fastening holes in the multiple layers of the first punching sheets which are positioned on the same axis are aligned to form a fastening channel, and the stud bolts penetrate through the fastening channel; and the tooth structures positioned at the same circumferential position are sequentially stacked together along the axis direction of the first punching sheet to form a winding part.
Further, the stator core further comprises a plurality of positioning bars; the outer edge of the first arc-shaped sheet is provided with a first welding groove; the first welding grooves are located at the same circumferential position and are sequentially communicated to form a first welding groove along the axis direction of the first punching sheet, and the positioning strips are welded in the first welding groove.
Furthermore, welding gaps are respectively arranged at two end parts of the outer edge of the first arc-shaped sheet; in the same first punching sheet, two welding gaps which are butted together form a second welding groove; in the multiple layers of the first punching sheets, along the axis direction of the first punching sheets, the second welding grooves and the first welding grooves are alternately arranged and are mutually communicated to form second welding grooves, and the positioning strips are also welded in the second welding grooves.
Further, the rotor core includes:
the second stamped sheet is integrally in a circular ring structure and comprises a plurality of second arc-shaped sheets which are sequentially connected together, a plurality of through holes are further formed in the arc-shaped sheets, and the plurality of layers of the second stamped sheets are sequentially stacked together;
the two end parts of the tension rods are respectively in threaded connection with locking nuts;
the second arc-shaped pieces in one layer of the second punching pieces are attached to two second arc-shaped pieces in the other layer of the second punching pieces in a butt joint mode, through holes in the multiple layers of the second punching pieces on the same axis are aligned to form a tensioning channel, and the tensioning rod penetrates through the tensioning channel.
Furthermore, a plurality of positioning ribs arranged in parallel are arranged on the mounting bracket; the inward flange of second arc piece is provided with a plurality of location breachs, follows the second is towards the axis direction of piece, is located same circumference position department the location breach communicates in proper order and forms the constant head tank, the location muscle is inserted and is corresponded in the constant head tank.
Compared with the prior art, the invention has the advantages and positive effects that: through adopting split type design towards the piece, form towards the piece through a plurality of arcs piece, and, the multilayer towards the piece when piling up the equipment, the arc piece in adjacent two-layer towards the piece will the dislocation arrange, then, through the taut fixed stator core that forms of stud, realize the stagger between adjacent two-layer towards the piece and fold and press, increased the frictional force of each other between the two-layer towards the piece, restrict non-deformable mutually between the multilayer towards the piece, and then improve the overall structure intensity of stator, with the overall reliability who improves the motor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a permanent magnet variable frequency integrated motor according to the present invention;
FIG. 2 is a cross-sectional view of a permanent magnet variable frequency integrated motor of the present invention;
FIG. 3 is a cross-sectional view of a rotor of the present invention;
FIG. 4 is an assembled view of the rotor middle shaft and the first shaft seat of the present invention;
FIG. 5 is an exploded view of the rotor of the present invention;
FIG. 6 is an assembly diagram of two adjacent second punching sheets in the rotor core;
FIG. 7 is an exploded view of the stator of the present invention;
FIG. 8 is an enlarged view of a portion of area A of FIG. 7;
fig. 9 is an exploded view of the stator core;
fig. 10 is an assembly diagram of two adjacent first stamped sheets of the stator core.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 10, the permanent magnet frequency conversion integrated motor of the present embodiment includes a motor main body 100, a frequency conversion module 200, and a water cooling plate 300, wherein the motor main body 100 includes a stator 1, a rotor 2, and a housing 3, the stator 1 and the rotor 2 are installed in the housing 3, the frequency conversion module 200 is installed on the housing 3 through the water cooling plate 300, a water flow channel is formed in the water cooling plate 300, and cooling water flows into the water flow channel of the water cooling plate 300 to dissipate heat of the motor main body 100 and the frequency conversion module 200.
The following structural improvements of the stator 1 and the rotor 2 are described with reference to the drawings.
For the stator 1, the stator 1 includes a stator core 11 and a winding 12. In order to improve the overall structural strength of the stator core 11, the stator core 11 is modified as follows.
For the rotor 2. As shown in fig. 1 to 6, the rotor 2 includes a rotating shaft 21, a rotor core 22, and a permanent magnet 23, and the rotor core 22 has a sleeve structure. In order to enable the permanent magnets 23 to be uniformly distributed on the rotor core 22 to obtain the optimal motor efficiency, a plurality of slots are formed in the rotor core 22 around the axis of the rotor core, the slots extend along the axis direction of the rotor core 22, the permanent magnets 23 are in a strip-shaped structure and are inserted into the corresponding slots, and the rotor core 22 is sleeved outside the rotating shaft 21.
Specifically, the slots are uniformly distributed around the axis of the rotor core 22 near the outer circumference of the rotor core 22, and correspondingly, the permanent magnets 23 are inserted into each slot, so that the distance between each permanent magnet 23 and the axis of the rotor core 22 is the same, and higher motor efficiency can be obtained. And the slot is also provided with oppositely arranged backing plates 231, the permanent magnet 23 is clamped between the two backing plates 231, and the backing plates 231 can insulate and isolate the permanent magnet 23 to be installed in the slot.
For the convenience of assembling the rotating shaft 21 to the housing 1, the front and rear end faces of the housing 1 are respectively provided with mounting ports (not labeled); the rotor 2 further comprises a first shaft seat 201 and a second shaft seat 202, wherein the first shaft seat 201 and the second shaft seat 202 are respectively provided with a bearing 203, and the first shaft seat 201 and the second shaft seat 202 are installed in corresponding installation openings on the housing 1 so as to facilitate the assembly of the rotating shaft.
An annular retaining ring 204 is arranged on the outer side of the first shaft seat 201 at the driving end to shield the bearing 203, the bearing 203 in the first shaft seat 201 adopts a deep groove ball to ensure the stability of the butt end of the equipment, the second shaft seat 202 at the non-driving end is provided with an end cover 205 to shield the bearing 203, and the bearing 203 of the second shaft seat 202 adopts a cylindrical roller bearing, so that the structure is favorable for eliminating adverse effects caused by thermal expansion of the rotating shaft 21.
Preferably, a mounting groove 2011 is arranged on the first shaft seat 201, and a rotary encoder 400 for detecting the rotating speed of the rotating shaft is arranged in the mounting groove. Specifically, in order to more conveniently detect the rotation speed of the rotation shaft 21, the rotary encoder 400 may be directly installed in the installation groove 2011 of the first shaft base 201, and then the rotation speed of the rotation shaft 21 may be detected by the rotary encoder 400.
Similarly, in order to effectively reduce the weight of the rotor 2, the rotor 2 further includes a mounting bracket 24, the mounting bracket 24 is provided with a shaft hole (not labeled), the rotating shaft 21 is installed in the shaft hole, and the rotor core 22 is sleeved outside the mounting bracket 24. Specifically, the mounting bracket 24 is adopted to assemble the rotating shaft 21 and the rotor core 22 together, so that the overall weight of the mounting bracket 24 is light, and the overall weight of the rotor core 22 can be effectively reduced. In order to facilitate the installation of the rotating shaft 21 into the shaft hole of the mounting bracket 24, a first key slot is provided on the rotating shaft 21, a second key slot is provided in the shaft hole, the rotating shaft 21 is connected with the mounting bracket 24 through a key 211, and the key 211 is located in the first key slot and the second key slot.
The mounting bracket 24 includes an inner cylinder 242 and an outer cylinder 241, the outer cylinder 241 is sleeved outside the inner cylinder 242, a support plate 243 is disposed between the outer cylinder 241 and the inner cylinder 242, and the inner cylinder 242 has the shaft hole. Specifically, the mounting bracket 24 is formed by adopting an inner cylinder and an outer cylinder, so that the assembly requirements of the rotating shaft 21 and the rotor core 22 can be better met, and the rotor core 22 and the rotating shaft 21 can be arranged coaxially during assembly as long as the inner cylinder 242 and the outer cylinder 241 are ensured to be arranged coaxially during the machining process, so that the assembly difficulty is reduced. In order to improve the connection reliability between the inner cylinder 242 and the outer cylinder 241, the support plate 243 includes an annular plate that is fitted over the inner cylinder 242 and disposed between the inner cylinder 242 and the outer cylinder 241, and a rib that extends along the axis of the inner cylinder 242 and is disposed between the inner cylinder 242 and the outer cylinder 241.
Further, in order to improve the assembly efficiency and accuracy of the rotor core 22, the rotor core 22 includes a plurality of layers of second stamped sheets 221 sequentially connected together, a plurality of insertion holes 222 are formed in the second stamped sheets 221 around the axis of the second stamped sheets, and the insertion holes are coaxially arranged and are mutually communicated to form the insertion slot. Specifically, the rotor core 22 is processed by stacking a plurality of second punching sheets 221, and the structural size of each second punching sheet 221 is the same, so that the rotor core 22 with a proper size can be set as required, and the processing size of the rotor core 22 can be kept consistent, so that the assembly efficiency and the assembly precision are improved. The insertion holes formed by the second punching sheets 221 form insertion slots for inserting the permanent magnets 23 after the plurality of layers of second punching sheets 221 are assembled. And the insertion hole is close to the outer circumferential ring of the second punching sheet 221 so that the permanent magnet 23 can be closer to the stator 1.
Furthermore, the second punching sheet 221 includes a plurality of second arc-shaped sheets 2211, the plurality of second arc-shaped sheets 2211 are sequentially connected in a butt joint manner to form the second punching sheet 221, and each second arc-shaped sheet 2211 is provided with at least one insertion hole. Specifically, the plurality of second arc-shaped pieces 2211 are sequentially connected in an abutting mode to form the second punching piece 221, so that the machining size of the single-layer second punching piece 221 can be reduced, and the machining difficulty is effectively reduced. Preferably, for two second punching sheets 221 which are abutted together, the second arc-shaped sheet 2211 in one second punching sheet 221 is abutted with two second arc-shaped sheets 2211 in the other second punching sheet 221 which are abutted together. Specifically, the second arc-shaped pieces 2211 in the two adjacent layers of second punching sheets 221 are arranged in a staggered manner. The second arc-shaped pieces 2211 arranged in a staggered mode can effectively increase restriction and constraint between the second arc-shaped pieces 2211 attached together in the two layers of second punching sheets 221, so that the stress of each second arc-shaped piece 2211 is more uniform, and the overall structural strength is higher.
In order to improve the assembling reliability between the second punching sheets 221, the rotor core 22 further includes a first tension bar 25; the second punching sheet 221 is also provided with a first through hole 223, and the first through hole 223 is close to the outer periphery of the second punching sheet 221 and is positioned between two adjacent insertion holes; the plurality of first through holes 223 coaxially arranged and communicating with each other form a first tightening passage in which the first tightening rod 25 is inserted, and both end portions of the first tightening rod 25 are threadedly connected with first locking nuts. Meanwhile, the rotor core 22 further includes a second tension bar 26; the second punching sheet 221 is also provided with a second through hole 224, and the second through hole 224 is close to the inner circumference of the second punching sheet 221; the plurality of second through holes 224, which are coaxially arranged and communicate with each other, form a second tightening passage, in which the second tightening rod 26 is inserted, and both end portions of the second tightening rod 26 are threadedly connected with second lock nuts. Specifically, in the process of assembling the multiple layers of the second punching sheets 221, the second punching sheets 221 are installed on the first tensioning rod 25 and the second tensioning rod 26 through the first through hole 223 and the second through hole 224, and the two tensioning rods are used for further achieving the assembling and positioning functions. Preferably, the two end portions of the rotor core 22 are respectively provided with a first pressing ring 27, the first pressing ring 27 shields the slot, and the first tension bar 25 clamps the second stamped sheet 221 between the two first pressing rings 27.
Further, a plurality of positioning ribs 244 are provided on an outer wall of the outer cylinder 241, and a plurality of positioning grooves are provided on an inner wall of the rotor core 22, in which the positioning ribs 244 are inserted. Specifically, the positioning groove is formed by arranging the notch structure 225 on the inner ring of the second mounting plate, and the positioning rib 244 is matched with the positioning groove, so that the rotor core 22 can be firmly and reliably mounted on the mounting bracket 24. In order to improve the connection reliability, the positioning groove is of a dovetail structure, and the cross section of the positioning rib 244 is also of a dovetail structure. Preferably, the outer cylinder 241 is provided with a plurality of mounting holes (not shown), and the positioning rib 244 is provided with a plurality of screw holes (not labeled), into which bolts are inserted from the outer cylinder 241 and screwed. Specifically, in the process of assembling the rotor core 22 to the mounting bracket 24, the positioning ribs 244 are loosened first, so that the positioning ribs 244 can be smoothly loaded into the corresponding positioning grooves. Finally, the bolts are tightened so that the rotor core 22 is fastened to the mounting bracket 24. Further, second pressing rings 28 are provided at both end portions of the rotor core 22, respectively, and the positioning groove is shielded by the second pressing rings 28, and the two second pressing rings 28 are tightened to each other by the second tightening rod 26.
As shown in fig. 7-10, the stator core 11 includes a plurality of layers of first punching sheets 111 connected together in sequence, and an inner circumference of the first punching sheet 111 is provided with a plurality of tooth structures 1112 around an axis thereof; along the axial direction of the first punching sheet 111, the tooth structures 1112 located at the same circumferential position are stacked together in sequence to form winding portions, a slot structure 110 is formed between two adjacent winding portions, and the cable of the winding 12 is wound on the winding portions.
Wherein, for the structural strength who improves stator core 11 to improve packaging efficiency and precision, first punching sheet 111 includes a plurality of first arc pieces 1111, and a plurality of first arc pieces 1111 dock in proper order and form first punching sheet 111 together, all is provided with tooth structure 1112 and fastening hole 1113 on every first arc piece 1111.
Specifically, first towards piece 111 adopts a plurality of first arc pieces 1111 to link together in proper order with cyclic annular trend, like this, alright in order to reduce the machining dimension of the first piece 111 towards of individual layer, the effectual degree of difficulty that reduces processing. And for the two first punching sheets 111 which are attached together, the first arc-shaped sheet 1111 in one first punching sheet 111 and the two first arc-shaped sheets 1111 in the other first punching sheet 111 which are butted together are attached together. When actual equipment, the equal dislocation arrangement of first arc piece 1111 in adjacent two-layer first punching sheet 111, the restriction tie between the first arc piece 1111 together of leaning on in two-layer first punching sheet 111 of increase that the first arc piece 1111 of dislocation arrangement can be effectual for the atress of each first arc piece 1111 is more even, and overall structure intensity is higher.
On the other hand, in order to fasten the multi-layer first sheet 111, a plurality of fastening holes 1113 are formed in the first sheet 111 along the outer circumferential direction, and the plurality of fastening holes 1113 coaxially arranged and communicated with each other form a fastening passage into which a stud bolt 112 is inserted, and a fastening nut (not shown) is screwed to an end portion of the stud bolt 112. In the process of stacking the multiple layers of first stamped sheets 111 together, each layer of first stamped sheets 111 is correspondingly mounted on the stud bolt 112, the stud bolt 112 is correspondingly inserted into the fastening hole 1113, and the stud bolt 112 further performs the assembling and positioning functions. Because realize the stagger between two adjacent layers of first punching sheet 111 and fold and press to in the axis direction, wear locking fastening together through many stud 112, make between the first punching sheet 111 of multilayer form with overall structure, and can not take place dislocation removal between the layer.
Further, in order to more firmly and reliably connect and fix the multiple layers of first stamped sheets together, the stator core further comprises a plurality of positioning bars 113; the outer edge of the first arc-shaped sheet is provided with a first welding groove 1114; along the axis direction of first towards the piece, be located the first welding groove 1114 of same circumference position department and communicate in proper order and form first welding recess, the welding has the gib block 113 in the first welding recess.
Specifically, after the layers of the first stamped sheets 111 are fastened together by the stud bolts 112, the positioning strip 113 can be placed in the first welding groove 1114, and then the positioning strip 113 is welded in the first welding groove 1114. In this way, the first punching sheets can be further firmly connected together by welding the first welding grooves 1114 in the positioning strips 113. Wherein, in welding process, a plurality of arc piece 1111 fissure of displacement in each layer first punching sheet 111 arranges, and then in welding process for each layer arc piece 1111 can keep the position firm, avoids taking place position change because of welding stress, in order to improve the equipment precision. Preferably, the first arc-shaped sheet in one layer of the first punching sheets is located in the middle of a unit formed by two first arc-shaped sheets butted together in the other layer of the first punching sheets.
Preferably, as shown in fig. 10, two end portions of the outer edge of the first arc-shaped piece are respectively provided with a welding notch 1115; in the same first punching sheet, two welding notches 1115 which are butted together form a second welding groove (not marked); in the multilayer first punching sheet, along the axis direction of the first punching sheet, the second welding grooves and the first welding grooves 1114 are alternately arranged and mutually communicated to form second welding grooves, and positioning strips 113 are also welded in the second welding grooves. Specifically, because first punching sheet 111 adopts a plurality of arcs 1111 to splice and form, will form the concatenation gap in concatenation department, and through setting up welding notch 1115 in order to form second welding groove after the concatenation, and in welding process, equally, weld in second welding groove through locating bar 113. Meanwhile, the second welding groove is aligned with the first welding groove at the corresponding position of the two adjacent layers, so that the two arc-shaped pieces 1111 spliced together are firmly connected together by using the positioning strip 113. For the first welding groove 1114 and the second welding groove, a trapezoidal groove is adopted, and the opening size of the trapezoidal groove is large, so that the positioning strip 113 can be conveniently placed and welded.
In addition, the stator core 11 is formed by processing a plurality of first punching sheets 111 in a stacking mode, and the structural size of each first punching sheet 111 is the same, so that the stator core 11 with a proper size specification can be set as required, and the processing size of the stator core 11 can be ensured to be consistent, so that the assembly efficiency and the assembly precision are improved. The tooth structure 1112 extends towards the center of the first punching sheet 111, and a groove structure 110 with a trapezoidal cross section is formed between every two adjacent winding portions. As for the assembly manner of the stator core 11 and the winding 12, a plurality of slot structures 110 may be disposed on the inner surface of the stator core 11, the winding 12 is disposed in the slot structures 110, and a positioning insertion strip 13 is further disposed at an opening of the slot structures 110, where the positioning insertion strip 13 abuts against the winding 12.
Specifically, for the winding 12, it is common to use a cable that is wound around the positioning core and is located in the slot structure 110. In the actual use process, the wound cable is loosened under the influence of the operation vibration of the permanent magnet frequency conversion integrated motor, and the positioning insertion strip 13 is arranged at the opening of the slot structure 110, so that the winding 12 is positioned and limited in the slot structure 110 by the positioning insertion strip 13. Thus, in the actual use process, even if the cable of the winding 12 is loosened due to the vibration generated by the permanent magnet frequency conversion integrated motor, the winding can be prevented from being separated from the opening of the slot structure 110 under the action of the positioning inserting strip 13, so that the use reliability is improved. And the winding quality improving winding 12 for the convenient and rapid winding is that the winding 12 is a flat copper wire wound on the winding part and adjacent flat copper wires are stacked together.
The cross section of the groove structure 110 is a trapezoid structure, and the cross section of the positioning insert 13 is also a trapezoid structure. In the actual assembly process, after the winding 12 is placed in the slot structure 110, the positioning slips 13 are inserted into the slot structure 110 and positioned outside the winding 12. Positioning the slip 13 will cause the winding 12 to compact in the slot structure 110. Preferably, a spacer 14 is further disposed in the slot structure 110, and the winding 12 is sandwiched between two spacers 14, so that the two spacers 14 can protect the winding 12 during the process of inserting the positioning insert 13 into the slot structure 110, thereby improving the assembly quality.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A permanent magnet variable frequency integrated motor comprising: a housing, a stator and a rotor, the stator and the rotor being disposed in the housing, the rotor being inserted in the stator; the method is characterized in that:
the front end surface and the rear end surface of the shell are respectively provided with a mounting port;
the stator comprises a stator core and a plurality of windings, and the windings are arranged on the stator core;
the rotor comprises a rotating shaft, a rotor iron core, a permanent magnet, a first shaft seat, a second shaft seat and a mounting bracket, wherein the mounting bracket is provided with a shaft hole, the rotating shaft is mounted in the shaft hole, the rotor iron core is of a sleeve structure and is sleeved outside the mounting bracket, one end of the rotating shaft is inserted on the first shaft seat, and the other end of the rotating shaft is inserted on the second shaft seat;
wherein the first shaft seat is arranged in the mounting opening on the front end surface of the shell, and the second shaft seat is arranged in the mounting opening on the rear end surface of the shell.
2. The permanent magnet frequency conversion integrated motor according to claim 1, wherein the mounting bracket comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved outside the inner cylinder, a support plate is arranged between the outer cylinder and the inner cylinder, and the shaft hole is formed in the inner cylinder.
3. The permanent magnet frequency conversion integrated motor according to claim 2, wherein the support plate comprises an annular plate and a rib plate, the annular plate is sleeved on the inner cylinder and is arranged between the inner cylinder and the outer cylinder, and the rib plate extends along the axis of the inner cylinder and is arranged between the inner cylinder and the outer cylinder.
4. The permanent magnet variable frequency integrated motor according to claim 1, wherein a mounting groove is arranged on the first shaft seat, and a rotary encoder for detecting the rotating speed of the rotating shaft is arranged in the mounting groove.
5. The permanent magnet variable frequency integrated motor according to any one of claims 1 to 4, wherein the stator core comprises:
the multi-layer first punching sheet is integrally in a circular ring structure and comprises a plurality of first arc-shaped sheets which are sequentially connected together, a plurality of tooth structures are formed on the inner edge of each first arc-shaped sheet, a plurality of fastening holes are further formed in each first arc-shaped sheet, and the plurality of layers of first punching sheets are sequentially stacked together;
the two end parts of the stud bolts are respectively in threaded connection with fastening nuts;
the first arc-shaped pieces in one layer of the first punching sheet and the two first arc-shaped pieces in the other layer of the first punching sheet which are butted together are attached together, the fastening holes in the multiple layers of the first punching sheets which are positioned on the same axis are aligned to form a fastening channel, and the stud bolts penetrate through the fastening channel; and the tooth structures positioned at the same circumferential position are sequentially stacked together along the axis direction of the first punching sheet to form a winding part.
6. The permanent magnet variable frequency integrated motor according to claim 5, wherein the stator core further comprises a plurality of positioning bars; the outer edge of the first arc-shaped sheet is provided with a first welding groove; the first welding grooves are located at the same circumferential position and are sequentially communicated to form a first welding groove along the axis direction of the first punching sheet, and the positioning strips are welded in the first welding groove.
7. The permanent magnet frequency conversion integrated motor according to claim 6, wherein welding notches are respectively formed at two end parts of the outer edge of the first arc-shaped sheet; in the same first punching sheet, two welding gaps which are butted together form a second welding groove; in the multiple layers of the first punching sheets, along the axis direction of the first punching sheets, the second welding grooves and the first welding grooves are alternately arranged and are mutually communicated to form second welding grooves, and the positioning strips are also welded in the second welding grooves.
8. The permanent magnet variable frequency integrated motor according to any one of claims 1 to 4, wherein the rotor core comprises:
the second stamped sheet is integrally in a circular ring structure and comprises a plurality of second arc-shaped sheets which are sequentially connected together, a plurality of through holes are further formed in the arc-shaped sheets, and the plurality of layers of the second stamped sheets are sequentially stacked together;
the two end parts of the tension rods are respectively in threaded connection with locking nuts;
the second arc-shaped pieces in one layer of the second punching pieces are attached to two second arc-shaped pieces in the other layer of the second punching pieces in a butt joint mode, through holes in the multiple layers of the second punching pieces on the same axis are aligned to form a tensioning channel, and the tensioning rod penetrates through the tensioning channel.
9. The permanent magnet and variable frequency integrated motor according to claim 8, wherein a plurality of positioning ribs arranged in parallel are arranged on the mounting bracket; the inward flange of second arc piece is provided with a plurality of location breachs, follows the second is towards the axis direction of piece, is located same circumference position department the location breach communicates in proper order and forms the constant head tank, the location muscle is inserted and is corresponded in the constant head tank.
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| CN2019214457078 | 2019-09-02 | ||
| CN201921445707 | 2019-09-02 |
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| CN202021782246.6U Active CN213185673U (en) | 2019-09-02 | 2020-08-24 | Permanent magnet frequency conversion all-in-one machine |
| CN202010858688.2A Active CN112003396B (en) | 2019-09-02 | 2020-08-24 | Stator core and permanent magnet frequency conversion all-in-one machine |
| CN202010857266.3A Pending CN112003395A (en) | 2019-09-02 | 2020-08-24 | Permanent magnet frequency conversion integrated motor |
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| CN202021782246.6U Active CN213185673U (en) | 2019-09-02 | 2020-08-24 | Permanent magnet frequency conversion all-in-one machine |
| CN202010858688.2A Active CN112003396B (en) | 2019-09-02 | 2020-08-24 | Stator core and permanent magnet frequency conversion all-in-one machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552823A (en) * | 2022-01-11 | 2022-05-27 | 龚成乐 | A wrong utmost point rotor structure for exchanging synchronous servo motor of permanent magnetism |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN213185673U (en) | 2021-05-11 |
| CN112003396A (en) | 2020-11-27 |
| CN112003396B (en) | 2022-07-15 |
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