CN114448129A

CN114448129A - Motor rotor without external magnetic bridge

Info

Publication number: CN114448129A
Application number: CN202111676846.3A
Authority: CN
Inventors: 孙天夫; 冯伟; 王旭; 梁嘉宁
Original assignee: Shenzhen Institute of Advanced Technology of CAS
Current assignee: Shenzhen Institute of Advanced Technology of CAS
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-06
Also published as: WO2023124833A1

Abstract

The application discloses no outer magnetic bridge motor rotor relates to motor technical field. Not only can strengthen the rotor strength and reduce the rotor weight, but also can reduce the motor magnetic leakage, increase the motor torque density and save the silicon steel material. The rotor for the non-external magnetic bridge synchronous reluctance motor comprises a first rotor core, a first non-magnetic-conductive material framework and a plurality of first iron core splicing blocks; the first non-magnetic-permeability material framework comprises a first lower end cover and a plurality of first framework piece groups arranged on the first lower end cover, and the first framework piece groups are uniformly distributed on the first lower end cover along the circumferential direction; the first framework piece group comprises a first framework piece and a plurality of second framework pieces which are arranged along the radial direction, a first gap is formed between every two adjacent second framework pieces or between the first framework piece and the second framework pieces, the first iron core splicing block and the first rotor core are connected to the first lower end cover, and the first rotor core is concentric with the rotating shaft of the motor; the first core segment is located in the first gap. The application is used for improving the performance of the motor rotor.

Description

Motor rotor without external magnetic bridge

Technical Field

The application relates to the technical field of motors, in particular to a motor rotor without an external magnetic bridge.

Background

Compared with the conventional Induction Machine (IM), electric machine structures such as an Interior Permanent Magnet Synchronous Machine (IPMSM), a synchronous reluctance machine (SynRM), and a permanent magnet assisted synchronous reluctance machine (PMa-SynRM) are becoming the mainstream of the market due to their high torque density.

Wherein, the cross-sectional structure of the synchronous reluctance motor is shown in fig. 1. The synchronous reluctance motor comprises a motor stator 011, a motor winding 012, an outer magnetic bridge 014, a magnetic barrier 015, an inner magnetic bridge 016 and a rotor iron core or rotor non-magnetic conductive material core 017, wherein an air gap 013 is formed between the motor stator 011 and the outer magnetic bridge 014. The purpose of the magnetic barrier 015 is to block the magnetic circuit, so that the magnetic resistance of the magnetic field in the direction perpendicular to the magnetic barrier increases, and the material of the magnetic barrier 015 is generally a material with larger magnetic resistance, such as air. The inner magnetic bridge 016 acts opposite to the magnetic barrier 015, and acts to reduce the magnetic resistance of the magnetic field in the direction of the inner magnetic bridge, so that the magnetic field can easily pass through the inner magnetic bridge 016. The material of the inner magnetic bridge 016 is generally silicon steel with great magnetic permeability and the like. Because the magnetic resistance in the d-axis direction and the q-axis direction in the figure are different, the rotating magnetic field generated by the winding of the motor stator 011 can attract the rotor to synchronously rotate along the d-axis based on the principle of minimum magnetic resistance.

The outer magnetic bridges 014 serve to connect the inner magnetic bridges 016 together to ensure the mechanical strength of the entire rotor. However, in the prior art, the outer magnetic bridge 014 and the inner magnetic bridge 016 are usually integrated (both made of silicon steel). In order to prevent the magnetic field that should flow through the inner magnetic bridge 016 from flowing away from the outer magnetic bridge 014 (leaking magnetic), the outer magnetic bridge 014 is usually made thin so that the magnetic field flowing through the outer magnetic bridge is more easily saturated to block the leaking magnetic. The too thin outer magnetic bridge 014 not only reduces mechanical strength, but also increases processing cost. Therefore, the contradiction between the mechanical strength of the outer magnetic bridge 014 and the magnetic flux leakage is an important problem that plagues the torque improvement of the motor.

The cross-sectional structure of the permanent magnet assisted synchronous reluctance machine is shown in fig. 2. The permanent magnet auxiliary synchronous reluctance motor is based on the synchronous reluctance motor, and a permanent magnet 021 is embedded in a rotor magnetic barrier. In addition to the reluctance torque, the magnetic field generated by the permanent magnet of the rotor interacts with the magnetic field generated by the stator winding to generate electromagnetic torque. Similar to the synchronous reluctance motor, the permanent magnet-assisted synchronous reluctance motor also has a contradiction between the mechanical strength and the magnetic flux leakage of the outer magnetic bridge.

The cross-sectional structure of the interior permanent magnet synchronous motor is shown in fig. 3. Similar to the permanent magnet-assisted synchronous reluctance motor, the rotor of the embedded permanent magnet synchronous motor also comprises permanent magnets 031, and the motor can also generate electromagnetic torque and reluctance torque simultaneously. The torque generated by the interior permanent magnet synchronous motor is mainly electromagnetic torque, and the torque generated by the permanent magnet auxiliary synchronous reluctance motor is mainly reluctance torque. The embedded permanent magnet synchronous motor also has the contradiction between the mechanical strength and the magnetic leakage of the external magnetic bridge.

Specifically, in addition to the spoke-type interior permanent magnet synchronous motor rotor structure shown in fig. 3, the interior permanent magnet synchronous motor rotor structure can be further divided into a V-type (fig. 4), a U-type (fig. 5), a linear type (fig. 6) and the like according to different arrangement modes of the interior permanent magnet synchronous motor rotor permanent magnets. The V-shaped embedded permanent magnet synchronous motor rotor comprises a V-shaped permanent magnet 041, the U-shaped embedded permanent magnet synchronous motor rotor comprises a U-shaped permanent magnet 051, and the I-shaped embedded permanent magnet synchronous motor rotor comprises an I-shaped permanent magnet 061.

In the above motor rotor structure design, in order to increase the torque density of the motor, the rotor structure parameters, such as the number of magnetic barrier layers, the widths of the inner and outer magnetic bridges, etc., need to be reasonably designed. Taking a reluctance motor as an example, fig. 7 is a partial flux density cloud chart, and fig. 8 is an enlarged view of an outer magnetic bridge part of the flux density cloud chart. In order to avoid magnetic leakage, the width of the outer magnetic bridge of the motor needs to be as narrow as possible so that the magnetic circuit is saturated and no more magnetic field can pass through. However, in order to ensure the mechanical strength of the rotor and within the allowable range of the processing precision, the outer magnetic bridge of the rotor cannot be designed to be too narrow, so that a part of magnetic leakage always exists in the existing synchronous reluctance motor, the permanent magnet auxiliary synchronous reluctance motor and the embedded permanent magnet synchronous motor, and the torque density and the power density of the motor are greatly reduced.

Disclosure of Invention

The embodiment of the application provides a no outer magnetic bridge electric motor rotor, not only can strengthen rotor strength, reduce rotor weight, can also reduce motor magnetic leakage, increase motor torque density and save the silicon steel material.

In order to achieve the above object, in a first aspect, an embodiment of the present application provides a rotor for an external magnetic bridge-free synchronous reluctance motor, including a first rotor core, a first nonmagnetic material skeleton, and a plurality of first core segments; the first non-magnetic-permeability material framework comprises a first lower end cover and a plurality of first framework piece groups arranged on the first lower end cover, and the first framework piece groups are uniformly distributed on the first lower end cover along the circumferential direction; the first framework tablet group comprises a first framework tablet and a plurality of second framework tablets which are arranged along the radial direction, and a first gap is formed between every two adjacent second framework tablets or between the first framework tablet and the second framework tablets; the first iron core splicing block and the first rotor core are connected to the first lower end cover, and the first rotor core is concentric with a motor rotating shaft; the first core segment is located within the first gap.

Further, the first rotor core is located at the center of the first lower end cover, the first framework piece is arranged close to the outer edge of the first lower end cover, and the sizes of the openings of the second framework piece increase progressively from inside to outside.

Further, the first framework plate group comprises a first upper end cover arranged at the top of the first framework plate group, and the first framework plate group is clamped between the first upper end cover and the first lower end cover.

Furthermore, a first positioning groove is formed in the first upper end cover, and the upper end of the first framework plate group is inserted into the first positioning groove of the upper end cover.

Further, the first rotor core is a first rotor non-magnetic conductive material core or a first rotor iron core.

In a second aspect, an embodiment of the present application further provides a rotor for an external magnetic bridge-free permanent magnet-assisted synchronous reluctance motor, including a second rotor core, a second nonmagnetic material skeleton, a plurality of second core segments, and a plurality of first permanent magnets; the second nonmagnetic material skeleton comprises a second lower end cover and a plurality of second skeleton plate groups arranged on the second lower end cover; the plurality of second framework plate groups are uniformly distributed on the second lower end cover along the circumferential direction; the second framework tablet group comprises third framework tablets and a plurality of fourth framework tablets with broken middles, which are arranged along the radial direction, and a second gap is formed between every two adjacent fourth framework tablets or between each third framework tablet and each fourth framework tablet; the second rotor core, the second iron core splicing blocks and the first permanent magnets are connected to the second lower end cover, the second rotor core is concentric with the motor shaft, the second iron core splicing blocks are located in the second gap, and the first permanent magnets are located at the broken positions of the fourth framework pieces.

Further, the second rotor core is located in the center of the second lower end cover, the second skeleton piece is arranged close to the outer edge of the second lower end cover, and the sizes of the openings of the fourth skeleton pieces increase gradually from inside to outside.

Further, the connecting structure further comprises a second upper end cover arranged at the top of the second framework plate group, and the second framework plate group is clamped between the second upper end cover and the second lower end cover.

Furthermore, a second positioning groove is formed in the second upper end cover, and the upper end of the second framework plate group is inserted into the second positioning groove.

Further, the second rotor core is a second rotor non-magnetic conductive material core or a second rotor iron core

In a third aspect, an embodiment of the present application further provides a rotor for an external magnetic bridge-free spoke-type embedded permanent magnet synchronous motor, including a third non-magnetic-permeable material skeleton, a plurality of third iron core segments, and a plurality of spoke-type permanent magnet spoke-type permanent magnets; the third non-magnetic material skeleton comprises a third lower end cover, a first annular skeleton arranged on the third lower end cover and a plurality of fifth skeleton pieces uniformly distributed along the circumferential direction of the third lower end cover; the permanent magnets are connected between the first annular framework and the corresponding fifth framework piece, and the third iron core splicing block is positioned between the two spoke type permanent magnet spoke type permanent magnets which are adjacent.

Further, a plurality of the fifth skeleton tablets are positioned outside the first annular skeleton.

The first annular framework and the fifth framework piece are clamped between the third upper end cover and the third lower end cover.

Furthermore, a first annular framework positioning groove and a fifth framework piece positioning groove are formed in the third upper end cover, the upper end of the first annular framework is inserted into the first annular framework positioning groove, and the upper end of the fifth framework piece is inserted into the fifth framework piece positioning groove.

In a fourth aspect, an embodiment of the present application further provides a rotor for an external magnetic bridge-free embedded permanent magnet synchronous motor, including a fourth nonmagnetic material skeleton, a plurality of fourth iron core segments, and a plurality of second permanent magnets; the fourth non-magnetic material skeleton comprises a fourth lower end cover and a sixth skeleton sheet arranged on the fourth lower end cover; the sixth framework pieces are uniformly distributed on the fourth lower end cover along the circumferential direction, the second permanent magnet is connected between every two adjacent sixth framework pieces, and the fourth iron core splicing block is connected between every two adjacent sixth framework pieces and is located on the outer side of the second permanent magnet.

Further, the second permanent magnet is a V-shaped permanent magnet, a U-shaped permanent magnet or a I-shaped permanent magnet.

The fourth upper end cover is arranged on the top of the sixth framework piece, and the sixth framework piece is clamped between the fourth lower end cover and the fourth upper end cover.

Furthermore, a fourth positioning groove is formed in the fourth upper end cover, and the upper end of the sixth framework piece is inserted into the fourth positioning groove.

Compared with the prior art, the application has the following beneficial effects:

the embodiment of the application adopts the 'non-magnetic-permeability-material framework' to replace an outer magnetic bridge of a rotor of a traditional motor, and the magnetic bridge in the motor is fixed between the non-magnetic-permeability-material frameworks, so that the mechanical strength of the motor rotor is met, the magnetic leakage of the outer magnetic bridge is avoided, and the distance between the inner magnetic bridge and a stator is reduced. Therefore, the effect of improving the torque density of the motor by reducing the magnetic leakage of the rotor is achieved, and the mechanical strength of the rotor is increased.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a prior art synchronous reluctance machine;

FIG. 2 is a cross-sectional structural diagram of a prior art permanent magnet assisted synchronous reluctance machine;

FIG. 3 is a cross-sectional view of a prior art spoke-type PMSM;

FIG. 4 is a cross-sectional view of a prior art V-type interior permanent magnet synchronous motor;

FIG. 5 is a cross-sectional view of a prior art U-shaped interior permanent magnet synchronous motor;

FIG. 6 is a cross-sectional view of a prior art PMSM;

FIG. 7 is a partial flux density cloud diagram of a prior art reluctance machine;

FIG. 8 is an enlarged view of a portion of a magnetic flux density cloud of a prior art reluctance machine;

FIG. 9 is a schematic cross-sectional view of a synchronous reluctance machine according to an embodiment of the present invention;

fig. 10 is a schematic cross-sectional view illustrating a rotor of a synchronous reluctance motor according to an embodiment of the present invention;

fig. 11 is a schematic perspective view illustrating a first core segment of a synchronous reluctance motor according to an embodiment of the present invention;

fig. 12 is a schematic perspective view of a rotor core in a synchronous reluctance motor according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a first lower end cap in a synchronous reluctance motor according to an embodiment of the present application;

FIG. 14 is a schematic view of an angle of a first non-magnetic material armature of a synchronous reluctance machine without an outer magnetic bridge according to an embodiment of the present application;

FIG. 15 is a schematic view of another angle of the armature of the first non-magnetic material in a synchronous reluctance machine without an outer magnetic bridge according to an embodiment of the present application;

FIG. 16 is a schematic perspective view of a rotor of a synchronous reluctance machine without an outer magnetic bridge according to an embodiment of the present application;

fig. 17 is a schematic perspective view illustrating a second skeleton plate in a synchronous reluctance motor according to an embodiment of the present invention;

fig. 18 is a schematic perspective view illustrating a first skeleton sheet set in a synchronous reluctance motor according to an embodiment of the present application;

fig. 19 is a schematic perspective view of a rotor of a synchronous reluctance motor according to another embodiment of the present application;

FIG. 20 is a schematic cross-sectional view of a permanent magnet assisted synchronous reluctance machine according to an embodiment of the present application;

fig. 21 is a schematic cross-sectional structure view of a rotor in a permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

fig. 22 is a schematic perspective view of a rotor core in a permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

fig. 23 is a schematic structural diagram of a second lower end cover in the permanent magnet assisted synchronous reluctance motor according to the embodiment of the present application;

FIG. 24 is a schematic view of an angle of a second non-magnetic material armature of the PMSM according to the embodiment of the present application;

FIG. 25 is a schematic view of another angle of the bobbin of the second non-magnetic material in the PMSM according to the embodiment of the present application;

fig. 26 is a schematic perspective view of a rotor of a permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

fig. 27 is a schematic perspective view of a second frame plate set in the permanent magnet assisted synchronous reluctance motor according to the embodiment of the present application;

fig. 28 is a schematic cross-sectional view of a spoke-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 29 is a schematic perspective view of a rotor core in a spoke-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 30 is a schematic structural view of a third lower end cap in the spoke-type interior permanent magnet synchronous motor according to the embodiment of the present application;

FIG. 31 is a schematic structural diagram of a third non-magnetic material framework of a spoke-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 32 is a schematic perspective view of a rotor of a spoke-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 33 is a schematic view illustrating positions of a first ring frame and a fifth frame piece in a spoke-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 34 is a schematic perspective view of a third lower end cap of a spoke-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 35 is a schematic perspective view of a rotor of a spoke-type interior permanent magnet synchronous motor according to another embodiment of the present application;

fig. 36 is a schematic cross-sectional view of a V-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 37 is a schematic perspective view of a rotor core in a V-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 38 is a schematic structural view of a fourth lower end cover in the V-type interior permanent magnet synchronous motor according to the embodiment of the present application;

FIG. 39 is a schematic structural diagram of a fourth nonmagnetic material skeleton in a V-type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 40 is a schematic perspective view of a rotor of a V-embedded pmsm according to an embodiment of the present application;

fig. 41 is a schematic perspective view illustrating a sixth skeleton plate of an interior permanent magnet synchronous motor according to embodiment V of the present application;

fig. 42 is a schematic perspective view illustrating a fourth lower end cap of an interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 43 is a schematic perspective view of a rotor of a V-embedded pmsm according to another embodiment of the present application;

fig. 44 is a schematic cross-sectional view of a U-shaped interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 45 is a schematic perspective view of a rotor core in a U-shaped embedded permanent magnet synchronous motor according to an embodiment of the present application;

fig. 46 is a schematic structural view of a fifth lower end cover in a U-shaped interior permanent magnet synchronous motor according to the embodiment of the present application;

FIG. 47 is a schematic structural diagram of a fifth nonmagnetic material skeleton in a U-shaped interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 48 is a schematic perspective view illustrating a rotor of a U-shaped interior permanent magnet synchronous motor according to an embodiment of the present disclosure;

fig. 49 is a schematic perspective view of a third outer frame piece of a U-shaped interior permanent magnet synchronous motor according to an embodiment of the present disclosure;

fig. 50 is a schematic perspective view illustrating a fifth lower end cover of a U-shaped interior permanent magnet synchronous motor according to an embodiment of the present disclosure;

fig. 51 is a schematic perspective view of a rotor of a U-shaped interior permanent magnet synchronous motor according to another embodiment of the present application;

fig. 52 is a schematic cross-sectional view illustrating an embedded permanent magnet synchronous motor according to an embodiment of the present application;

fig. 53 is a schematic perspective view illustrating a rotor core of an interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 54 is a schematic structural view of a sixth bottom end cover of an interior permanent magnet synchronous motor according to an embodiment of the present application;

FIG. 55 is a schematic diagram of a sixth magnetically non-conductive material armature of an interior permanent magnet synchronous machine according to an embodiment of the present application;

fig. 56 is a schematic perspective view illustrating a rotor of an interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 57 is a schematic perspective view illustrating a fourth outer frame piece of an interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 58 is a schematic perspective view of a sixth bottom end cap of an interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 59 is a schematic perspective view illustrating a rotor of an interior permanent magnet synchronous motor according to another embodiment of the present application.

Fig. 60 is a schematic cross-sectional structure view of an outer rotor synchronous reluctance motor according to an embodiment of the present application;

fig. 61 is a schematic cross-sectional structure view of an outer rotor permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

fig. 62 is a schematic cross-sectional structure view of an outer rotor spoke type interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 63 is a schematic cross-sectional view of an outer rotor V-shaped interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 64 is a schematic cross-sectional structure view of an outer rotor U-shaped interior permanent magnet synchronous motor according to an embodiment of the present application;

fig. 65 is a schematic cross-sectional view of an outer rotor type interior permanent magnet synchronous motor according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

Referring to fig. 9 to 12, embodiments of the present application provide a rotor for a synchronous reluctance motor without an outer magnetic bridge provided in the synchronous reluctance motor. The synchronous reluctance motor comprises a motor stator 14, a motor winding 15 and a rotor 10 for the synchronous reluctance motor without an external magnetic bridge. A first air gap 16 is formed between the motor stator 14 and the rotor for the synchronous reluctance motor without an outer magnetic bridge. The rotor for the outer magnetic bridge-free synchronous reluctance motor comprises a first rotor core 11, a first non-magnetic-conductive material skeleton 12 and a plurality of first iron core segments 13. The first non-magnetic material bobbin 12 includes a first lower end cap 121 and a plurality of first bobbin sheet sets 122 disposed on the first lower end cap 121, the plurality of first bobbin sheet sets 122 having a shape similar to that of an internal magnetic bridge of the prior art. The first rotor core 11 may be a first rotor non-magnetic conductive material core or a first rotor core, and both the first rotor core and the first core segment 13 are silicon steel sheets. The inside of the first rotor non-magnetic conductive material core is a non-magnetic conductive material. The first non-magnetic material framework 12 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramic or copper. The first framework sheet group 122 made of the non-magnetic material is adopted to replace an outer magnetic bridge and a magnetic barrier in the prior art, so that the mechanical strength of the rotor can be enhanced, and magnetic leakage can be prevented.

Specifically, referring to fig. 10 to 12, in some embodiments, since the rotor is shaped like a cylinder, the first lower end cover 121 is shaped like a disk, and the plurality of first skeleton plate groups 122 are uniformly distributed on the first lower end cover 121 along the circumferential direction. The first frame plate group 122 includes a first frame plate 124 and a plurality of second frame plates 123 arranged in a radial direction, and the first frame plate 124 is arranged near the outer edge of the first lower end cap 121. The sizes of the openings of the second skeleton pieces 123 increase gradually from inside to outside, and a first gap is formed between two adjacent second skeleton pieces 123 or between the first skeleton piece 124 and the second skeleton piece 123 located outside. The first rotor core 11 and the first core segment 13 are both connected to the first lower end cap 121, and the first rotor core 11 is located at the center of the first lower end cap 121, and the first core segment 13 is located in the second gap. The first lower end cap 121 and the first skeleton plate group 122 are separate members, the first lower end cap 121 and the first skeleton plate group 122 are both made of non-magnetic materials, and the first skeleton plate group 122 is made of resin, plastic, adhesive, and the like. The first lower end cap 121 is provided with a plurality of first core positioning slots 125 for fixing the first core segments 13. The processing method of this example is as follows:

referring to fig. 11 to 13, a silicon steel sheet or other magnetic conductive material is first fabricated into the first core segment 13 by a method of pin joint, welding, die casting or bonding, and the first core segment 13 may be provided with pin holes 131. The first rotor core body 11 and the first core segments 13 are magnetic conductive structures of the motor rotor (inner magnetic bridges of the synchronous reluctance motor). And then the first rotor core body 11 and each first core segment 13 are placed together according to a preset position to form the motor rotor core. Specifically, the lower ends of the first core segments 13 may be respectively inserted into the corresponding first core positioning slots 125, and then, resin, plastic, adhesive, and other materials are poured into the gap between the first lower end cap 121 and the first rotor core body 11 and the first core segments 13, and after these materials are cured, the first lower end cap 121, the first rotor core body 11 and the first core segments 13 may be firmly bonded together.

In some embodiments, referring to fig. 14-16, the first lower end cap 121 and the plurality of first bobbin sheet sets 122 are a unitary piece, and the first non-magnetic material bobbin 12 may be fabricated by machining, injection molding, 3D printing, casting, or die forming. It should be noted that: the first non-magnetic material framework 12 can be directly made into a whole, or a plurality of parts can be connected into a whole in a bonding mode. Then, the first rotor core body 11 and the first core segments 13 are embedded into the skeleton grooves, and the first nonmagnetic material skeleton 12, the first rotor core body 11 and the first core segments 13 are fixed into a whole in a glue reinforcement mode.

In some embodiments, referring to fig. 17-19, the first non-magnetic material armature 12 includes a first armature sheet set 122 and first upper end caps 126 disposed at upper and lower ends of the first armature sheet set 122, respectively. The first upper end cap 126 is provided with a first positioning groove 127, and the upper end of the first frame plate group 122 is inserted into the first positioning groove 127. Therefore, during processing, the second skeleton piece 124 and the first skeleton piece 123 in the first skeleton piece group 122 are manufactured by adopting a mechanical processing, injection molding, 3D printing or mold forming mode, then the first skeleton piece group 122 is inserted into the first positioning groove 127, the first rotor core body 11 and the first core segment 13 are embedded into the skeleton grooves, and finally the first non-magnetic material-conducting material skeleton 12, the first rotor core body 11 and the first core segment 13 are fixed into a whole.

In other embodiments, the first top end cap 126 has no positioning slot, and the first frame piece set 122 is tightly clamped between the first top end cap 126 and the first bottom end cap 121.

Referring to fig. 20 and 21, an embodiment of the present application further provides a rotor 20 for an external magnetic bridge-free permanent magnet assisted synchronous reluctance motor disposed in the permanent magnet assisted synchronous reluctance motor, which is similar in structure to the synchronous reluctance motor except that the rotor 20 for the external magnetic bridge-free permanent magnet assisted synchronous reluctance motor further includes a first permanent magnet 24, and thus, the structure of the permanent magnet assisted synchronous reluctance motor will not be described in detail herein.

The rotor 20 for the permanent magnet assisted synchronous reluctance machine without the outer magnetic bridge comprises a second rotor core 21, a second non-magnetic-conductive material skeleton 22, a plurality of second core segments 23 and a plurality of first permanent magnets 24. The second nonmagnetic material armature 22 includes a second lower end cap 221 and a plurality of second armature sheet sets 222 disposed on the second lower end cap 221. The shape of the second plurality of skeletal plate segments 222 is similar to the shape of the prior art internal magnetic bridge. The second rotor core 21 and the second core segment 23 are both silicon steel sheets. The first non-magnetic material framework 12 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramic or copper. The second frame piece group 222 made of the non-magnetic material is adopted to replace an outer magnetic bridge and a magnetic barrier in the prior art, so that the mechanical strength of the rotor can be enhanced, and magnetic leakage can be prevented.

Specifically, referring to fig. 20 to 23, in some embodiments, since the rotor is cylindrical, the second lower end cover 221 is disc-shaped, and the plurality of second skeleton plate groups 222 are uniformly distributed on the second lower end cover 221 along the circumferential direction. The second skeleton plate group 222 includes a third skeleton plate 223 and a plurality of fourth skeleton plates 224 with middle breaks, the third skeleton plate 223 is disposed near the outer edge of the second lower end cover 221, that is, the fourth skeleton plate 224 includes a left half portion and a right half portion, the opening sizes of the fourth skeleton plates 224 increase from inside to outside, and a gap is formed between two adjacent fourth skeleton plates 224 or between the third skeleton plate 223 and the fourth skeleton plate 224. The second rotor core 21, the second core segment 23, and the first permanent magnet 24 are all connected to the second lower end cover 221, the second rotor core 21 is located in the center of the second lower end cover 221, the second core segment 23 is located in a gap between two adjacent fourth skeleton pieces 224 or a gap between the third skeleton piece 223 and the fourth skeleton piece 224 located outside, and the first permanent magnet 24 is located between the left half portion and the right half portion of the fourth skeleton piece 224. The second bottom end cap 221 and the second skeleton sheet set 222 are separate pieces, both of which are made of non-magnetic materials, and the second skeleton sheet set 222 is made of resin, plastic, adhesive, and the like. The second bottom cover 221 has a plurality of second core slots 225 for holding the second core segments 23 and permanent magnet slots 228 for holding the first permanent magnets 24. The processing method of this example is as follows:

referring to fig. 20 to 23, a silicon steel sheet or other magnetic conductive material is first fabricated into the second core segment 23 by pinning, welding, die casting or bonding. The second rotor core 21 and the second core segments 23 are the magnetic conductive structure of the motor rotor (inner magnetic bridge of the permanent magnet auxiliary synchronous reluctance motor). Then, the second rotor core 21, the second core segments 23 and the first permanent magnets 24 are placed together according to preset positions to form the rotor core of the motor. Specifically, the lower ends of the second core segments 23 may be respectively inserted into the corresponding second core positioning slots 225, the lower ends of the first permanent magnets 24 are respectively inserted into the corresponding permanent magnet positioning slots 228, and then materials such as resin, plastic, adhesive, etc. are poured into the gaps between the second lower end cover 221 and the second rotor core 21 and the second core segments 23, and after these materials are cured, the second lower end cover 221 and the second rotor core 21, the second core segments 23, and the first permanent magnets 24 may be firmly bonded together.

In some embodiments, referring to fig. 24-26, the second bottom end cap 221 and the plurality of second bobbin sheet sets 222 are a single piece, and the second non-magnetic material bobbin 22 can be manufactured by machining, injection molding, 3D printing, casting, or die forming. It should be noted that: the second non-magnetic material skeleton 22 may be directly made into a whole or a plurality of parts may be connected into a whole by bonding. Then, the second rotor core 21 and the second core segment 23 are embedded into the skeleton grooves, and the second non-magnetic material skeleton 22 is fixed with the second rotor core 21 and the second core segment 23 into a whole in a glue-reinforced manner.

In some embodiments, referring to fig. 27, the second non-magnetic material armature 22 includes a first armature sheet set 222 and second upper end caps respectively disposed at upper and lower ends of the second armature sheet set 222. The second upper end cover is provided with a second positioning groove, and two ends of the second frame sheet set 222 are inserted into the second positioning groove. Therefore, during processing, the fourth skeleton piece 224 and the third skeleton piece 223 in the second skeleton piece group 222 are manufactured by adopting a mechanical processing, injection molding, 3D printing or mold forming mode, then the second skeleton piece group 222 is inserted into the second positioning groove, the second rotor core body and the second core split block are embedded into the skeleton grooves, and finally the second non-magnetic-conductive material skeleton 22, the second rotor core body and the second core split block are fixed into a whole in a glue reinforcing mode.

In other embodiments, the second top cover 226 has no positioning slot, and the second frame piece set 222 is tightly clamped between the first top cover 126 and the second bottom cover 221.

Referring to fig. 28 to 30, an embodiment of the present application further provides a rotor 30 for an external magnetic bridge-free spoke-type interior permanent magnet synchronous motor, including a third nonmagnetic material skeleton 32, a plurality of third core segments 31, and a plurality of spoke-type permanent magnets 33. The third non-magnetic material-conducting framework 32 comprises a third lower end cover 321 and a first annular framework 322 arranged on the third lower end cover 321, and a plurality of fifth framework pieces 323 uniformly distributed along the circumferential direction are arranged on the periphery of the first annular framework 322; the spoke-type permanent magnets 33 are connected between the first annular skeleton 322 and the corresponding fifth skeleton plate 323, and the third iron core split block 31 is positioned between two adjacent spoke-type permanent magnets 33. The third iron core split 31 is made of silicon steel. The third non-magnetic material framework 32 is made of non-magnetic material, and the non-magnetic material can be aluminum, plastic, resin, carbon fiber, ceramic or copper. In the embodiment of the application, the first annular skeleton 322 and the fifth skeleton piece 323 made of the non-magnetic material are used for replacing an outer magnetic bridge in the prior art, so that the mechanical strength of the rotor can be enhanced, and magnetic leakage can be prevented.

Specifically, referring to fig. 28 to 30, in some embodiments, since the rotor is cylindrical, the third bottom end cap 321 is disc-shaped, the first annular frame 322 is disposed at the center of the third bottom end cap 321, a plurality of fifth frame pieces 323 uniformly distributed in the circumferential direction are disposed on the outer periphery of the first annular frame 322, and the fifth frame pieces 323 are disposed near the outer edge of the third bottom end cap 321. The spoke-type permanent magnets 33 and the third iron core segments 31 are both connected to the third lower end cover 321, the spoke-type permanent magnets 33 are connected between the first annular framework 322 and the corresponding fifth framework pieces 323, and the third iron core segments 31 are located between two adjacent spoke-type permanent magnets 33.

The third lower end cap 321, the first annular skeleton 322 and the fifth skeleton plate 323 are all made of non-magnetic materials, and the first annular skeleton 322 and the fifth skeleton plate 323 are made of resin, plastic, adhesive and the like. The third lower end cap 321 is provided with a plurality of third core positioning grooves 325 for fixing the third core segments 33 and spoke-type permanent magnet fixing grooves 326 for fixing the spoke-type permanent magnets 33. The processing method of this example is as follows:

referring to fig. 28 to 30, a third iron core segment 31 made of silicon steel or other magnetic materials and spoke-type permanent magnets 33 are placed together according to a preset position to form a motor rotor iron core. Specifically, the lower ends of the third iron core segments 31 and the spoke-type permanent magnets 33 can be respectively inserted into the corresponding third iron core positioning grooves 325 and the corresponding spoke-type permanent magnet fixing grooves 326, and then materials such as resin, plastic, adhesive and the like are poured into the gaps between the third lower end cover 321 and the third iron core segments 31 and the spoke-type permanent magnets 33, and after the materials are cured, the third lower end cover 321, the third iron core segments 31 and the spoke-type permanent magnets 33 can be firmly bonded together.

In some embodiments, referring to fig. 31 and 32, the third lower end cap 321, the first annular skeleton 322 and the fifth skeleton sheet 323 are a single piece, and the third non-magnetic material skeleton 32 can be manufactured by machining, injection molding, 3D printing, casting or die forming. Then, the third iron core segments 31 and the spoke-type permanent magnets 33 are embedded into the framework grooves, and the third non-magnetic-permeability-material frameworks 32, the third iron core segments 31 and the spoke-type permanent magnets 33 are fixed into a whole in a glue-reinforced mode.

In some embodiments, referring to fig. 33 to 35, the third nonmagnetic material skeleton 32 includes first and fifth

annular skeletons

322 and 323 and third upper end caps 327 provided at upper and lower ends thereof. The third upper end cap 327 is provided with a first annular frame positioning slot 328 and a first frame plate positioning slot 329, two ends of the first annular frame positioning slot 328 are inserted into the first annular frame positioning slot 328, and two ends of the fifth frame plate 323 are inserted into the first frame plate positioning slot 329. Therefore, during processing, the first annular framework 322 and the fifth framework piece 323 are manufactured by adopting a mechanical processing, injection molding, 3D printing or mold forming mode, then the second framework piece group 222 is inserted into the corresponding positioning groove, the third iron core assembly 31 and the spoke type permanent magnet 33 are embedded into the framework groove, and finally the third non-magnetic material-conducting framework 32, the third iron core assembly 31 and the spoke type permanent magnet 33 are fixed into a whole in a glue reinforcing mode.

Referring to fig. 36 to 38, an embodiment of the present application further provides a rotor 40 for an outer magnetic bridge-free embedded permanent magnet synchronous motor, including a fourth nonmagnetic material skeleton 42, a plurality of fourth core segments 41, and a plurality of "V" -shaped permanent magnets 43; the fourth nonmagnetic material skeleton 42 comprises a fourth lower end cap 421 and a sixth skeleton piece 422 arranged on the fourth lower end cap 421; the sixth skeleton pieces 422 are uniformly distributed on the fourth lower end cover 421 along the circumferential direction, the "V" -shaped permanent magnet 43 is connected between two adjacent sixth skeleton pieces 422, and the fourth core segment 41 is connected between two adjacent sixth skeleton pieces 422 and is located outside the "V" -shaped permanent magnet 43. The fourth core segment 41 is made of silicon steel. The fourth non-magnetic material framework 42 is made of non-magnetic material, and the non-magnetic material can be aluminum, plastic, resin, carbon fiber, ceramic or copper. In the embodiment of the application, the sixth skeleton piece 422 made of the non-magnetic material is used for replacing an outer magnetic bridge in the prior art, so that the mechanical strength of the rotor can be enhanced, and magnetic leakage can be prevented.

Specifically, referring to fig. 35 to 38, in some embodiments, since the rotor is cylindrical, the fourth bottom end cap 421 is disc-shaped, and the sixth skeleton pieces 422 are uniformly distributed on the fourth bottom end cap 421 along the circumferential direction. The V-shaped permanent magnet 43 and the fourth core segment 41 are both connected to the fourth lower end cap 421, the V-shaped permanent magnet 43 is connected between two adjacent sixth skeleton pieces 422, and the fourth core segment 41 is connected between two adjacent sixth skeleton pieces 422 and is located outside the V-shaped permanent magnet 43.

The fourth lower end cap 421 and the sixth skeleton piece 422 are both made of non-magnetic materials, the sixth skeleton piece 422 is made of resin, plastic, adhesive, and the like, and the fourth lower end cap 421 is provided with a plurality of fourth iron core positioning grooves 423 for fixing the fourth iron core segments 41. The processing method of this example is as follows:

referring to fig. 35 to 38, a fourth iron core segment 41 made of silicon steel or other magnetic materials and a V-shaped permanent magnet 43 are placed together according to a preset position to form a rotor iron core of the motor. Specifically, the lower end of the fourth core segment 41 may be inserted into the fourth core positioning groove 423, and then, resin, plastic, adhesive, and other materials are poured into a gap between the fourth lower end cap 421 and the fourth core segment 41 and the "V" shaped permanent magnet 43, and after these materials are cured, the fourth lower end cap 421 and the fourth core segment 41 and the "V" shaped permanent magnet 43 can be firmly bonded together.

In some embodiments, referring to fig. 39 and 40, the fourth bottom end cap 421 and the sixth skeleton sheet 422 are a single piece, and the fourth nonmagnetic conductive material skeleton 42 may be manufactured by machining, injection molding, 3D printing, casting, or die forming. Then, the fourth iron core segment 41 and the V-shaped permanent magnet 43 are embedded into the skeleton grooves, and the fourth non-magnetic-conductive material skeleton 42 is fixed with the fourth iron core segment 41 and the V-shaped permanent magnet 43 into a whole in a glue-reinforced mode.

In some embodiments, referring to fig. 41 to 43, the fourth nonmagnetic material skeleton 42 includes a sixth skeleton sheet 422 and fourth upper end caps 424 disposed at upper and lower ends thereof. The fourth upper end cap 424 is provided with a sixth frame piece positioning groove 425, and two ends of the sixth frame piece 422 are inserted into the sixth frame piece positioning groove 425. Therefore, during processing, the sixth framework piece 422 is manufactured by adopting a mechanical processing, injection molding, 3D printing or mold forming mode, then the sixth framework piece 422 is inserted into the corresponding positioning groove, the fourth iron core segment 41 and the V-shaped permanent magnet 43 are embedded into the framework groove, and finally the fourth non-magnetic-conductive material framework 42, the fourth iron core segment 41 and the V-shaped permanent magnet 43 are fixed into a whole in a glue strengthening mode. Referring to fig. 44 to 46, an embodiment of the present application further provides a rotor 50 for an interior permanent magnet synchronous motor without an external magnetic bridge, including a fifth nonmagnetic material skeleton 52, a plurality of fifth core segments 51, and a plurality of "U" -shaped permanent magnets 53. The fifth nonmagnetic material skeleton 52 comprises a fifth lower end cap 521 and a third outer skeleton sheet 522 arranged on the fifth lower end cap 521; the third outer frame pieces 522 are uniformly distributed on the fifth lower end cover 521 along the circumferential direction, the "U" -shaped permanent magnet 53 is connected between two adjacent third outer frame pieces 522, and the fifth core segment 51 is connected between two adjacent third outer frame pieces 522 and is located outside the "U" -shaped permanent magnet 53. The fifth core segment 51 is made of silicon steel. The fifth non-magnetic material framework 50 is made of non-magnetic material, and the non-magnetic material can be aluminum, plastic, resin, carbon fiber, ceramic or copper. The third outer framework piece 522 made of the non-magnetic-conductive material is adopted to replace an outer magnetic bridge in the prior art, so that the mechanical strength of the rotor can be enhanced, and magnetic leakage can be prevented.

Specifically, referring to fig. 44 to 46, in some embodiments, since the rotor is cylindrical in shape, the fifth lower end cap 521 is disc-shaped, and the third outer frame pieces 522 are uniformly distributed on the fifth lower end cap 521 along the circumferential direction. The U-shaped permanent magnet 53 and the fifth core segment 51 are both connected to the fifth lower end cap 521, the U-shaped permanent magnet 53 is connected between two adjacent third outer frame pieces 522, and the fifth core segment 51 is connected between two adjacent third outer frame pieces 522 and is located outside the U-shaped permanent magnet 53.

The fifth lower end cap 521 and the third outer frame piece 522 are made of a non-magnetic material, the third outer frame piece 522 is made of resin, plastic, adhesive or the like, and the fifth lower end cap 521 is provided with a plurality of fourth core positioning grooves 423 for fixing the fifth core segment 51. The processing method of this example is as follows:

referring to fig. 44 to 46, a fifth iron core segment 51 made of silicon steel or other magnetic materials and a "U" shaped permanent magnet 53 are first placed together according to a preset position to form a rotor core of an electric machine. Specifically, the lower end of the fifth core segment 51 may be inserted into the fourth core positioning groove 423, and then, resin, plastic, adhesive, or other materials are poured into the gap between the fifth lower end cap 521 and the fifth core segment 51 and the "U" -shaped permanent magnet 53, and after the materials are cured, the fifth lower end cap 521 and the fifth core segment 51 and the "U" -shaped permanent magnet 53 may be firmly bonded together.

In some embodiments, referring to fig. 47 and 48, the fifth bottom end cap 521 and the third outer frame piece 522 are a single piece, and the fifth nonmagnetic material skeleton 50 may be manufactured by machining, injection molding, 3D printing, casting, or die forming. The fifth core segment 51 and the "U" -shaped permanent magnet 53 are then embedded in the skeleton grooves, and the fifth nonmagnetic material skeleton 50 is fixed integrally with the fifth core segment 51 and the "U" -shaped permanent magnet 53 by means of glue reinforcement.

In some embodiments, referring to fig. 49-51, the fifth nonmagnetic material armature 50 includes a third outer armature sheet 522 and fifth upper end caps 524 disposed at upper and lower ends thereof. The fifth upper end cap 524 is provided with a third outer frame piece positioning slot 525, and two ends of the third outer frame piece 522 are inserted into the third outer frame piece positioning slot 525. Therefore, during processing, the third outer framework piece 522 is manufactured by adopting a mechanical processing, injection molding, 3D printing or mold forming mode, then the third outer framework piece 522 is inserted into the corresponding positioning groove, the fifth iron core splicing piece 51 and the U-shaped permanent magnet 53 are embedded into the framework groove, and finally the fifth non-magnetic-conductive material framework 50, the fifth iron core splicing piece 51 and the U-shaped permanent magnet 53 are fixed into a whole in a glue reinforcing mode.

Referring to fig. 52 to 54, an embodiment of the present application further provides a rotor 60 for an outer magnetic bridge-free embedded permanent magnet synchronous motor, including a sixth nonmagnetic material skeleton 62, a plurality of sixth core segments 61, and a plurality of "one" -shaped permanent magnets 63. The sixth nonmagnetic material skeleton 62 comprises a sixth lower end cap 621 and a fourth outer skeleton sheet 622 arranged on the sixth lower end cap 621; the fourth outer frame pieces 622 are uniformly distributed on the sixth lower end cover 621 along the circumferential direction, the one-shaped permanent magnet 63 is connected between two adjacent fourth outer frame pieces 622, and the sixth iron core segment 61 is connected between two adjacent fourth outer frame pieces 622 and is located on the outer side of the one-shaped permanent magnet 63. The sixth core segment 61 is made of silicon steel. The sixth framework 62 is made of non-magnetic material, which may be aluminum, plastic, resin, carbon fiber, ceramic or copper. In the embodiment of the application, the fourth outer skeleton sheet 622 made of the non-magnetic material is used for replacing an outer magnetic bridge in the prior art, so that the mechanical strength of the rotor can be enhanced, and magnetic leakage can be prevented.

Specifically, referring to fig. 52 to 54, in some embodiments, since the rotor is cylindrical, the sixth bottom end cover 621 is disc-shaped, and the fourth outer skeleton plates 622 are uniformly distributed on the sixth bottom end cover 621 along the circumferential direction. The first-shaped permanent magnet 63 and the sixth core segment 61 are both connected to the sixth lower end cover 621, the first-shaped permanent magnet 63 is connected between two adjacent fourth outer skeleton pieces 622, and the sixth core segment 61 is connected between two adjacent fourth outer skeleton pieces 622 and is located on the outer side of the first-shaped permanent magnet 63.

The sixth lower end cap 621 and the fourth outer frame piece 622 are made of a non-magnetic material, the fourth outer frame piece 622 is made of resin, plastic, adhesive, and the like, and the sixth lower end cap 621 is provided with a plurality of fourth iron core positioning grooves 423 for fixing the sixth iron core segment 61. The processing method of this example is as follows:

referring to fig. 52 to 54, a sixth iron core segment 61 made of silicon steel or other magnetic materials and a "one" shaped permanent magnet 63 are placed together according to a preset position to form a rotor iron core of the motor. Specifically, the lower end of the sixth core segment 61 may be inserted into the fourth core positioning groove 423, and then, resin, plastic, adhesive, or other materials are poured into a gap between the sixth lower end cap 621 and the sixth core segment 61 and the "one" shaped permanent magnet 63, and after the materials are cured, the sixth lower end cap 621 and the sixth core segment 61 and the "one" shaped permanent magnet 63 can be firmly bonded together.

In some embodiments, referring to fig. 55 and 56, the sixth bottom end cap 621 and the fourth outer frame sheet 622 are a single piece, and the sixth nonmagnetic material frame 62 may be manufactured by machining, injection molding, 3D printing, casting, or die forming. Then, the sixth iron core segment 61 and the first permanent magnet 63 are embedded into the framework grooves, and the sixth non-magnetic-conductive material framework 62 is fixed with the sixth iron core segment 61 and the first permanent magnet 63 into a whole in a glue-reinforced mode.

In some embodiments, referring to fig. 57-59, the sixth magnetically non-conductive material armature 62 includes a fourth outer armature plate 622 and fifth upper end caps 524 disposed at upper and lower ends thereof. The fifth upper end cap 524 is provided with a third outer frame piece positioning groove 525, and two ends of the fourth outer frame piece 622 are inserted into the third outer frame piece positioning groove 525. Therefore, during processing, the fourth outer framework sheet 622 is manufactured by adopting a mechanical processing, injection molding, 3D printing or mold forming mode, then the fourth outer framework sheet 622 is inserted into the corresponding positioning groove, the sixth iron core segment 61 and the one-shaped permanent magnet 63 are embedded into the framework groove, and finally the sixth non-magnetic-conductive material framework 62, the sixth iron core segment 61 and the one-shaped permanent magnet 63 are fixed into a whole in a glue reinforcing mode.

Similarly, the embodiments of the present application are also applicable to an outer rotor motor structure in addition to an inner rotor motor, and fig. 60 to 65 show the designed inner magnetic bridge-free outer rotor motor structure.

Referring to fig. 60, an embodiment of the present application provides an outer rotor synchronous reluctance motor inner magnetic bridge-free structure. The outer rotor synchronous reluctance motor comprises a motor stator 17, a motor winding 16 and a rotor for the synchronous reluctance motor without an inner magnetic bridge. A first air gap 18 is formed between the motor stator 17 and the rotor of the outer rotor synchronous reluctance motor without the inner magnetic bridge. The rotor for the inner-magnetic-bridge-free outer rotor synchronous reluctance motor comprises a first non-magnetic-conductive material framework 12 and a plurality of first iron core splicing blocks 13, wherein the first iron core splicing blocks 13 are U-shaped and are sequentially and progressively opened from inside to outside along the radial direction. The non-magnetically permeable material armature 12 includes a first armature sheet set 112 and a first armature 128 disposed on a radially outer circle of the rotor and a second armature 129 disposed on a radially inner circle of the rotor.

Referring to fig. 61, an embodiment of the present application also provides an inner magnet bridge-free outer rotor permanent magnet-assisted synchronous reluctance motor structure including a rotor for an inner magnet bridge-free outer rotor permanent magnet-assisted synchronous reluctance motor including a second non-magnetic-conductive material bone 22, a plurality of second core segments 23, and a first permanent magnet 24. Second core segment 23 is U-shaped and is open in a radially increasing order from the inside to the outside. The second nonmagnetic material skeleton 22 comprises a second skeleton sheet group 212 with a broken middle, a third skeleton 228 arranged on a rotor radial outer side circle and a fourth skeleton 229 arranged on a rotor radial inner side circle, and the second permanent magnet 24 is embedded between the second iron core segment 23 and the second skeleton sheet group 212 with a broken middle.

Referring to fig. 62 to 65, the examples of the present application are also applied to an outer rotor interior permanent magnet synchronous motor, and are classified into a spoke type (fig. 62), a V type (fig. 63), a U type (fig. 64), a straight type (fig. 65), and the like according to different arrangements of outer rotor permanent magnets of the interior permanent magnet synchronous motor.

Referring to fig. 62, an embodiment of the present application provides an inner magnetic bridge-free outer rotor spoke type permanent magnet synchronous motor structure including a third non-magnetic-conductive material skeleton 32, a plurality of third core segments 31, and spoke type permanent magnets 33. The third non-magnetic-conductive material framework 32 comprises a first annular framework 322 and a fifth framework piece 323, the first annular framework 322 is located on the outer side, the fifth framework piece 323 is located on the inner side and is a dovetail-shaped framework piece, and the spoke-shaped permanent magnets 33 are embedded between the third iron core split blocks 31 and embedded in the positioning grooves of the third non-magnetic-conductive material framework 32.

Referring to fig. 63, an embodiment of the present application provides an inner magnet bridge-free outer rotor V-type permanent magnet synchronous motor structure including a fourth nonmagnetic material skeleton 42, a plurality of fourth core segments 41, and a "V" -shaped permanent magnet 43. The fourth nonmagnetic material skeleton 42 includes a fourth rotor outer nonmagnetic material skeleton 422 and a nonmagnetic material skeleton 423 disposed radially inside the rotor, and the fourth core segment 41 includes a core segment 411 disposed on the rotor outer side and a core segment 412 disposed on the inner side. The V-shaped permanent magnets 43 are embedded between the inner and outer core segments of the rotor.

Referring to fig. 64, an embodiment of the present application provides an inner magnetic bridge-free outer rotor U-shaped permanent magnet synchronous motor structure including a fifth nonmagnetic material skeleton 52, a plurality of fifth core segments 51, and a "U" -shaped permanent magnet 53. The fifth non-magnetic material framework 52 is arranged at the inner side of the rotor close to the stator, the fifth iron core segment 51 comprises an outer iron core segment 511 of the rotor and an inner iron core segment 512 of the rotor, and a U-shaped permanent magnet 53 is embedded between the inner iron core segment and the outer iron core segment of the fifth iron core segment 51.

Referring to fig. 65, an embodiment of the present application provides an inner magnetic bridge-free outer rotor type permanent magnet synchronous motor structure including a sixth nonmagnetic material skeleton 62, sixth core segments 61, and a "one" -shaped permanent magnet 63. The non-magnetic material frameworks 62 are arranged on the outer circle of the rotor, and the 'one' -shaped permanent magnet 63 is embedded between the sixth non-magnetic material frameworks 62 and on the sixth iron core segment 61.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A rotor for a synchronous reluctance motor without an external magnetic bridge is characterized by comprising a first rotor core, a first non-magnetic-conductive material skeleton and a plurality of first iron core splicing blocks; the first non-magnetic-permeability material framework comprises a first lower end cover and a plurality of first framework piece groups arranged on the first lower end cover, and the first framework piece groups are uniformly distributed on the first lower end cover along the circumferential direction; the first framework tablet group comprises a first framework tablet and a plurality of second framework tablets which are arranged along the radial direction, and a first gap is formed between every two adjacent second framework tablets or between the first framework tablet and the second framework tablets;

the first iron core splicing block and the first rotor core are connected to the first lower end cover, and the first rotor core is concentric with a motor rotating shaft; the first core segment is located within the first gap.

2. The rotor for the external magnetic bridge-free synchronous reluctance motor according to claim 1, wherein the first rotor core is located at the center of the first lower end cover, the first skeleton pieces are arranged near the outer edge of the first lower end cover, and the opening sizes of the second skeleton pieces increase from inside to outside in sequence.

3. A rotor for an external magnetic bridge-free synchronous reluctance motor according to claim 2, further comprising a first upper end cap disposed on top of said first bobbin sheet set, said first bobbin sheet set being clamped between said first upper end cap and said first lower end cap.

4. The rotor for the non-external magnetic bridge synchronous reluctance motor according to claim 3, wherein the first upper end cap is provided with a first positioning groove, and the upper end of the first bobbin sheet set is inserted into the first positioning groove of the upper end cap.

5. A rotor for a synchronous reluctance machine without an external magnetic bridge according to claim 2, wherein said first rotor core is a first rotor non-magnetic conductive material core or a first rotor core.

6. A rotor for an external magnetic bridge-free permanent magnet auxiliary synchronous reluctance motor is characterized by comprising a second rotor core, a second non-magnetic-conductive material framework, a plurality of second iron core splicing blocks and a plurality of first permanent magnets; the second non-magnetic material framework comprises a second lower end cover and a plurality of second framework piece groups arranged on the second lower end cover; the plurality of second framework plate groups are uniformly distributed on the second lower end cover along the circumferential direction; the second framework tablet group comprises third framework tablets and a plurality of fourth framework tablets with broken middles, which are arranged along the radial direction, and a second gap is formed between every two adjacent fourth framework tablets or between every two adjacent third framework tablets;

the second rotor core, the second iron core splicing blocks and the first permanent magnets are connected to the second lower end cover, the second rotor core is concentric with the motor shaft, the second iron core splicing blocks are located in the second gap, and the first permanent magnets are located at the broken positions of the fourth framework pieces.

7. The rotor for the non-external magnetic bridge permanent magnet-assisted synchronous reluctance motor according to claim 6, wherein the second rotor core is located at the center of the second lower end cover, the second skeleton pieces are arranged close to the outer edge of the second lower end cover, and the sizes of the openings of the fourth skeleton pieces increase from inside to outside.

8. The rotor for the non-external magnetic bridge permanent magnet auxiliary synchronous reluctance motor according to claim 7, further comprising a second upper end cover disposed on top of the second bobbin sheet set, wherein the second bobbin sheet set is clamped between the second upper end cover and the second lower end cover.

9. The rotor for the non-external magnetic bridge permanent magnet assisted synchronous reluctance motor according to claim 8, wherein a second positioning groove is formed in the second upper end cover, and the upper end of the second bobbin sheet set is inserted into the second positioning groove.

10. A rotor for a permanent-magnet synchronous reluctance machine without an external magnetic bridge according to claim 7, wherein said second rotor core is a second rotor non-magnetic-conductive material core or a second rotor core.

11. A rotor for a spoke-type embedded permanent magnet synchronous motor without an external magnetic bridge is characterized by comprising a third non-magnetic-permeability material framework, a plurality of third iron core splicing blocks and a plurality of spoke-type permanent magnets; the third non-magnetic material skeleton comprises a third lower end cover, a first annular skeleton arranged on the third lower end cover and a plurality of fifth skeleton pieces uniformly distributed along the circumferential direction of the third lower end cover; the permanent magnets are connected between the first annular framework and the corresponding fifth framework piece, and the third iron core splicing block is positioned between the two adjacent spoke type permanent magnets.

12. The rotor for an external magnetic bridge-free spoke-type interior permanent magnet synchronous motor according to claim 11, wherein a plurality of the fifth skeleton pieces are located outside the first annular skeleton.

13. The rotor for the external magnetic bridge-free spoke-type interior permanent magnet synchronous motor according to claim 12, further comprising a third upper end cover disposed on top of the fifth skeleton piece, wherein the first annular skeleton and the fifth skeleton piece are clamped between the third upper end cover and the third lower end cover.

14. The rotor for the spoke-type interior permanent magnet synchronous motor without the external magnetic bridge as recited in claim 13, wherein a first annular frame positioning groove and a fifth frame piece positioning groove are formed in the third upper end cover, an upper end of the first annular frame is inserted into the first annular frame positioning groove, and an upper end of the fifth frame piece is inserted into the fifth frame piece positioning groove.

15. A rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge is characterized by comprising a fourth non-magnetic-conductive material framework, a plurality of fourth iron core segments and a plurality of second permanent magnets; the fourth non-magnetic material skeleton comprises a fourth lower end cover and a sixth skeleton sheet arranged on the fourth lower end cover; the sixth framework pieces are uniformly distributed on the fourth lower end cover along the circumferential direction, the second permanent magnet is connected between every two adjacent sixth framework pieces, and the fourth iron core splicing block is connected between every two adjacent sixth framework pieces and is located on the outer side of the second permanent magnet.

16. The rotor for a non-magnetic bridge in-line permanent magnet synchronous motor according to claim 15, wherein the second permanent magnet is a "V" -shaped permanent magnet, a "U" -shaped permanent magnet, or a "one" -shaped permanent magnet.

17. The rotor for an external magnetic bridge-free embedded permanent magnet synchronous motor according to claim 15, further comprising a fourth upper end cover disposed on top of the sixth skeleton piece, wherein the sixth skeleton piece is clamped between the fourth lower end cover and the fourth upper end cover.

18. A rotor for an in-line permanent magnet synchronous motor without an external magnetic bridge according to claim 17, wherein a fourth positioning groove is provided on the fourth upper end cover, and an upper end of the sixth skeleton piece is inserted into the fourth positioning groove.