WO2023124833A1

WO2023124833A1 - Electric motor rotor without outer magnetic bridge

Info

Publication number: WO2023124833A1
Application number: PCT/CN2022/136973
Authority: WO
Inventors: 孙天夫; 冯伟; 王旭; 梁嘉宁
Original assignee: 深圳先进技术研究院
Priority date: 2021-12-31
Filing date: 2022-12-06
Publication date: 2023-07-06
Also published as: CN114448129A

Abstract

Disclosed in the present application is an electric motor rotor without an outer magnetic bridge, relating to the technical field of electric motors. The strength of the rotor can be enhanced, and the weight of the rotor is reduced; in addition, the magnetic flux leakage of an electric motor can be reduced, the torque density of the electric motor is increased, and the silicon steel material is saved. The rotor for a synchronous reluctance electric motor without an outer magnetic bridge comprises a first rotor core, a first non-magnetic material framework and a plurality of first iron core assembling blocks, wherein the first non-magnetic material framework comprises a first lower end cover and a plurality of first framework sheet groups arranged on the first lower end cover, the plurality of first framework sheet groups being uniformly distributed on the first lower end cover in a circumferential direction; each first framework sheet group comprises a first framework sheet and a plurality of second framework sheets which are arranged in a radial direction, a first gap is formed between every two adjacent second framework sheets or between each first framework sheet and the corresponding second framework sheet, the first iron core assembling blocks and the first rotor core are all connected to the first lower end cover, and the first rotor core is concentric to a rotating shaft of the electric motor; and the first iron core assembling blocks are located in the first gaps. The present application is used to improve the performance of the electric motor rotor.

Description

Motor rotor without external magnetic bridge

technical field

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

Background technique

Compared with the traditional induction motor (IM), the motor structures such as the interior permanent magnet synchronous motor (IPMSM), the synchronous reluctance motor (SynRM), and the permanent magnet assisted synchronous reluctance motor (PMa-SynRM) have high rotational speed. Moment density has gradually become the mainstream of the market.

Among them, the cross-sectional structure of the synchronous reluctance motor is shown in Fig. 1 . Synchronous reluctance motor, including motor stator 011, motor winding 012, outer magnetic bridge 014, magnetic barrier 015, inner magnetic bridge 016 and rotor core or rotor non-magnetic material core 017, wherein, motor stator 011 and outer magnetic bridge 014 An air gap 013 is formed between them. The purpose of the magnetic barrier 015 is to block the magnetic circuit, so that the reluctance of the magnetic field along the direction perpendicular to the magnetic barrier increases. The material of the magnetic barrier 015 is generally a material with a large magnetic resistance, such as air. The function of the inner magnetic bridge 016 is opposite to that of the magnetic barrier 015, and its function is to reduce the reluctance of the magnetic field along 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 a material such as silicon steel with a high magnetic permeability. Since the reluctance in the d-axis direction and the q-axis direction in the figure are different, based on the "minimum reluctance principle", the rotating magnetic field generated by the winding of the motor stator 011 can attract the rotor to rotate synchronously along the d-axis.

The function of the outer magnetic bridge 014 is to connect the inner magnetic bridges 016 of each layer to ensure the mechanical strength of the entire rotor. However, the existing technical solutions usually integrate the outer magnetic bridge 014 and the inner magnetic bridge 016 (both using silicon steel materials). In order to prevent the magnetic field that should have flowed through the inner magnetic bridge 016 from flowing away from the outer magnetic bridge 014 (magnetic flux leakage), the outer magnetic bridge 014 is usually made very thin, so that the magnetic field flowing through the outer magnetic bridge is easier to saturate to prevent magnetic flux leakage . The too thin outer magnetic bridge 014 not only reduces the mechanical strength, but also increases the processing cost. Therefore, the contradiction between the mechanical strength of the external magnetic bridge 014 and the magnetic flux leakage is an important problem that plagues the torque increase of the motor.

The cross-sectional structure of the permanent magnet assisted synchronous reluctance motor is shown in Fig. 2. The permanent magnet assisted synchronous reluctance motor is based on the synchronous reluctance motor, and the permanent magnet 021 is embedded in the rotor magnetic barrier. In this way, in addition to generating reluctance torque, the magnetic field generated by the rotor permanent magnet will also interact 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 of the external magnetic bridge and the flux leakage.

The cross-sectional structure of the embedded permanent magnet synchronous motor is shown in Figure 3. Similar to the permanent magnet assisted synchronous reluctance motor, the rotor of the embedded permanent magnet synchronous motor also contains permanent magnets 031, and the motor can also generate electromagnetic torque and reluctance torque at the same time. It’s just that the magnetic field intensity generated by the permanent magnet of the embedded permanent magnet synchronous motor is usually stronger than that of the permanent magnet assisted synchronous reluctance motor, so the torque generated by the embedded permanent magnet synchronous motor is mainly electromagnetic torque, while The torque generated by the permanent magnet assisted synchronous reluctance motor is mainly reluctance torque. The internal permanent magnet synchronous motor also has a contradiction between the mechanical strength of the external magnetic bridge and the magnetic flux leakage.

Specifically, in addition to the spoke-type embedded permanent magnet synchronous motor rotor structure shown in Figure 3, according to the different ways of permanent magnet arrangement of the embedded permanent magnet synchronous motor rotor, it can also be divided into V type (Figure 4), U type (Fig. 5), type I (Fig. 6), etc. Among them, the V-shaped embedded permanent magnet synchronous motor rotor includes V-shaped permanent magnets 041, the U-shaped embedded permanent magnet synchronous motor rotor includes U-shaped permanent magnets 051, and the type I embedded permanent magnet synchronous motor rotor includes a type permanent magnet magnet 061.

In the above motor rotor structure design, in order to increase the torque density of the motor, it is necessary to reasonably design the rotor structure parameters, such as the number of magnetic barrier layers, the width of the inner and outer magnetic bridges, etc. Taking the reluctance motor as an example, Fig. 7 is a partial flux density cloud map, and Fig. 8 is an enlarged view of the outer magnetic bridge of the flux density cloud map. In order to avoid magnetic flux leakage, it is necessary to set the width of the external magnetic bridge of the above-mentioned motor as narrow as possible so that the magnetic circuit is saturated, making it impossible to pass more magnetic fields.

technical problem

However, in order to ensure the mechanical strength of the rotor and within the allowable range of machining accuracy, the outer magnetic bridge of the rotor cannot be designed too narrow, so the existing synchronous reluctance motor, permanent magnet assisted synchronous reluctance motor and embedded permanent magnet synchronous motor There will be some flux leakage, which greatly reduces the torque density and power density of the motor.

technical solution

The embodiment of the present application provides a motor rotor without an external magnetic bridge, which can not only enhance the strength of the rotor, reduce the weight of the rotor, but also reduce the flux leakage of the motor, increase the torque density of the motor and save silicon steel materials.

In order to achieve the above purpose, in the first aspect, the embodiment of the present application provides a rotor for a synchronous reluctance motor without an external magnetic bridge, including a first rotor core, a first non-magnetic material skeleton and a plurality of first iron core assemblies Block; the first non-magnetic material skeleton includes a first lower end cover and a plurality of first skeleton sheet groups arranged on the first lower end cover, and a plurality of first skeleton sheet groups are uniformly distributed in the circumferential direction On the first lower end cover; the first skeleton sheet group includes a first skeleton sheet and a plurality of second skeleton sheets arranged in the radial direction, between two adjacent second skeleton sheets or between the first skeleton sheet and the first skeleton sheet There is a first gap between the second skeleton pieces; the first iron core block and the first rotor core are connected to the first lower end cover, and the first rotor core is concentric with the motor shaft; The first iron core block is located in the first gap.

Further, the first rotor core is located at the center of the first lower end cover, the first skeleton piece is arranged close to the outer edge of the first lower end cover, and the opening size of the second skeleton piece is determined by Incremental from inside to outside.

Further, it also includes a first upper end cover arranged on the top of the first frame sheet set, and the first frame sheet set is clamped between the first upper end cover and the first lower end cover.

Further, the first upper end cover is provided with a first positioning groove, and the upper end of the first frame sheet group is inserted into the first positioning groove of the upper end cover.

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

In the second aspect, the embodiment of the present application also provides a rotor for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge, including a second rotor core, a second non-magnetic material skeleton, and a plurality of second iron core pieces and a plurality of first permanent magnets; the second non-magnetic material skeleton includes a second lower end cap and a plurality of second skeleton sheet groups arranged on the second lower end cap; a plurality of second skeleton sheet groups Evenly distributed on the second lower end cover in the circumferential direction; the second skeleton sheet group includes a third skeleton sheet arranged in the radial direction and a plurality of fourth skeleton sheets disconnected in the middle, and two adjacent fourth skeleton sheets There is a second gap between the third skeleton piece and the fourth skeleton piece; the second rotor core, the second iron core block and the first permanent magnet are all connected to the second lower end cover , and the second rotor core is concentric with the motor shaft, the second iron core piece is located in the second gap, and the first permanent magnet is located at the disconnection of the fourth skeleton piece.

Further, the second rotor core is located at 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 opening size of the fourth skeleton piece is from inner to Incremental in order.

Further, it also includes a second upper end cover arranged on the top of the second frame sheet set, and the second frame sheet set is clamped between the second upper end cover and the second lower end cover.

Further, the second upper end cover is provided with a second positioning groove, and the upper end of the second skeleton sheet group is inserted into the second positioning groove.

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

In the third aspect, the embodiment of the present application also provides a rotor for an internal permanent magnet synchronous motor without external magnetic bridge spokes, including a third non-magnetic material skeleton, a plurality of third iron core pieces and a plurality of Spoke-type permanent magnets Spoke-type permanent magnets; the third non-magnetic material skeleton includes a third lower end cap and a first ring-shaped skeleton arranged on the third lower end cap, and a plurality of ring-shaped skeletons along the third lower end cap The fifth skeleton piece uniformly distributed in the circumferential direction; the permanent magnet is connected between the first annular skeleton and the corresponding fifth skeleton piece, and the third iron core piece is located at two adjacent spoke-shaped permanent magnets between the spoke-type permanent magnets.

Further, the plurality of fifth skeleton pieces are all located outside the first annular skeleton.

Further, it also includes a third upper end cover arranged on the top of the fifth skeleton piece, and both the first annular skeleton and the fifth skeleton piece are clamped on the third upper end cover and the third lower end between covers.

Further, the third upper end cover is provided with a first annular skeleton positioning groove and a fifth skeleton sheet positioning groove, the upper end of the first annular skeleton is inserted into the first annular skeleton positioning groove, and the fifth skeleton The upper end of the sheet is inserted into the positioning groove of the fifth skeleton sheet.

In the fourth aspect, the embodiment of the present application also provides a rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge, including a fourth non-magnetic material skeleton, a plurality of fourth iron core pieces and a plurality of second Permanent magnet; the fourth non-magnetic material skeleton includes a fourth lower end cover and a sixth skeleton piece arranged on the fourth lower end cover; the sixth skeleton piece is evenly distributed on the fourth lower end cover along the circumferential direction , the second permanent magnet is connected between two adjacent sixth skeleton pieces, and the fourth iron core piece is connected between two adjacent sixth skeleton pieces and is located at the edge of the second permanent magnet outside.

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

Further, it also includes a fourth upper end cover arranged on the top of the sixth skeleton piece, and the sixth skeleton piece is clamped between the fourth lower end cover and the fourth upper end cover.

Further, the fourth upper end cover is provided with a fourth positioning groove, and the upper end of the sixth skeleton piece is inserted into the fourth positioning groove.

Beneficial effect

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

The embodiment of this application adopts "non-magnetic material skeleton" to replace the outer magnetic bridge of the rotor of the traditional motor, and fixes the inner magnetic bridge of the motor between the non-magnetic material skeleton, which not only meets the mechanical strength of the motor rotor, but also avoids the external magnetic bridge. The flux leakage of the magnetic bridge is reduced, and the distance between the inner magnetic bridge and the stator is reduced. Therefore, the magnetic flux leakage of the rotor is reduced to achieve the effect of increasing the torque density of the motor, and the mechanical strength of the rotor is increased.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a cross-sectional structure of a synchronous reluctance motor in the prior art;

Fig. 2 is a schematic diagram of a cross-sectional structure of a permanent magnet assisted synchronous reluctance motor in the prior art;

Fig. 3 is a schematic diagram of the cross-sectional structure of the spoke type embedded permanent magnet synchronous motor in the prior art;

Fig. 4 is a schematic diagram of the cross-sectional structure of a V-shaped embedded permanent magnet synchronous motor in the prior art;

Fig. 5 is a schematic diagram of a cross-sectional structure of a U-shaped embedded permanent magnet synchronous motor in the prior art;

Fig. 6 is a schematic diagram of a cross-sectional structure of a type I embedded permanent magnet synchronous motor in the prior art;

Fig. 7 is the partial flux density nephogram of prior art reluctance motor;

Fig. 8 is a partially enlarged view of a partial flux density cloud map of a reluctance motor in the prior art;

Fig. 9 is a schematic diagram of a cross-sectional structure of a synchronous reluctance motor according to an embodiment of the present application;

Fig. 10 is a schematic diagram of a cross-sectional structure of a rotor in a synchronous reluctance motor according to an embodiment of the present application;

Fig. 11 is a schematic diagram of the three-dimensional structure of the first iron core block in the synchronous reluctance motor of the embodiment of the present application;

Fig. 12 is a three-dimensional structural schematic diagram 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 the first lower end cover in the synchronous reluctance motor of the embodiment of the present application;

Fig. 14 is a structural schematic diagram of an angle of the first non-magnetic material skeleton in the synchronous reluctance motor without external magnetic bridge in the embodiment of the present application;

Fig. 15 is a structural schematic view from another angle of the first non-magnetic material skeleton in the synchronous reluctance motor without external magnetic bridge in the embodiment of the present application;

Fig. 16 is a three-dimensional structural schematic diagram of a rotor in a synchronous reluctance motor without an external magnetic bridge according to an embodiment of the present application;

Fig. 17 is a schematic diagram of the three-dimensional structure of the second skeleton piece in the synchronous reluctance motor of the embodiment of the present application;

Fig. 18 is a schematic diagram of the three-dimensional structure of the first frame sheet group in the synchronous reluctance motor of the embodiment of the present application;

Fig. 19 is a schematic perspective view of the three-dimensional structure of the rotor in the synchronous reluctance motor according to another embodiment of the present application;

Fig. 20 is a schematic diagram of a cross-sectional structure of a permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

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

Fig. 22 is a three-dimensional structural schematic diagram 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 the second lower end cover in the permanent magnet assisted synchronous reluctance motor according to the embodiment of the present application;

Fig. 24 is a structural schematic diagram of an angle of the second non-magnetic material skeleton in the permanent magnet assisted synchronous reluctance motor according to the embodiment of the present application;

Fig. 25 is a structural schematic view from another angle of the second non-magnetic material skeleton in the permanent magnet assisted synchronous reluctance motor according to the embodiment of the present application;

Fig. 26 is a three-dimensional structural schematic diagram of a rotor in a permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

Fig. 27 is a schematic diagram of the three-dimensional structure of the second frame sheet group in the permanent magnet assisted synchronous reluctance motor according to the embodiment of the present application;

Fig. 28 is a schematic diagram of the cross-sectional structure of the spoke-type embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 29 is a schematic diagram of the three-dimensional structure of the rotor core in the spoke-type embedded permanent magnet synchronous motor according to the embodiment of the present application;

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

Fig. 31 is a schematic structural diagram of the third non-magnetic material skeleton in the spoke-type embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 32 is a three-dimensional structural schematic diagram of the rotor in a spoke-type embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 33 is a schematic diagram of the positions of the first annular frame and the fifth frame in the spoke-type embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 34 is a three-dimensional structural schematic diagram of the third lower end cover in the spoke-type embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 35 is a three-dimensional structural schematic diagram of the rotor in the spoke-type embedded permanent magnet synchronous motor according to another embodiment of the present application;

Fig. 36 is a schematic diagram of a cross-sectional structure of a V-shaped embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 37 is a schematic diagram of the three-dimensional structure of the rotor core in the V-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

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

Fig. 39 is a schematic structural view of the fourth non-magnetic material skeleton in the V-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 40 is a schematic diagram of the three-dimensional structure of the rotor in an embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 41 is a schematic diagram of the three-dimensional structure of the sixth skeleton piece in the embedded permanent magnet synchronous motor according to Embodiment V of the present application;

Fig. 42 is a schematic diagram of the three-dimensional structure of the fourth lower end cover in an embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 43 is a perspective view of the three-dimensional structure of the rotor in the embedded permanent magnet synchronous motor according to another embodiment V of the present application;

Fig. 44 is a schematic diagram of the cross-sectional structure of a U-shaped embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 45 is a schematic diagram of the three-dimensional structure of the rotor core in the U-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

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

Fig. 47 is a schematic structural diagram of the fifth non-magnetic material skeleton in the U-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 48 is a schematic diagram of the three-dimensional structure of the rotor in a U-shaped embedded permanent magnet synchronous motor according to an embodiment of the present application;

49 is a schematic diagram of the three-dimensional structure of the third outer skeleton piece in the U-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 50 is a three-dimensional structural schematic diagram of the fifth lower end cover in a U-shaped embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 51 is a schematic diagram of the three-dimensional structure of the rotor in the U-shaped embedded permanent magnet synchronous motor according to another embodiment of the present application;

Fig. 52 is a schematic diagram of the cross-sectional structure of an internal embedded permanent magnet synchronous motor according to Embodiment 1 of the present application;

Fig. 53 is a schematic diagram of the three-dimensional structure of the rotor core in the first-type embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 54 is a schematic structural view of the sixth lower end cover in the first type of embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 55 is a schematic structural view of the sixth non-magnetic material skeleton in the first type of embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 56 is a schematic diagram of the three-dimensional structure of the rotor in a type I embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 57 is a schematic diagram of the three-dimensional structure of the fourth outer frame piece in the first type of embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 58 is a schematic diagram of the stereoscopic structure of the sixth lower end cover in the type I embedded permanent magnet synchronous motor according to an embodiment of the present application;

Fig. 59 is a three-dimensional structural schematic view of the rotor in a type I interior permanent magnet synchronous motor according to another embodiment of the present application.

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

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

Fig. 62 is a schematic diagram of the cross-sectional structure of the outer rotor spoke type embedded permanent magnet synchronous motor according to the embodiment of the present application;

Figure 63 is a schematic diagram of the cross-sectional structure of the outer rotor V-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

Figure 64 is a schematic diagram of the cross-sectional structure of the outer rotor U-shaped embedded permanent magnet synchronous motor according to the embodiment of the present application;

Fig. 65 is a schematic diagram of a cross-sectional structure of an outer-rotor-type embedded permanent magnet synchronous motor according to an embodiment of the present application.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

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

Referring to FIG. 9 to FIG. 12 , an embodiment of the present application provides a rotor for a synchronous reluctance motor without an external magnetic bridge arranged in a synchronous reluctance motor. The synchronous reluctance motor includes a motor stator 14, a motor winding 15 and a rotor 10 for a synchronous reluctance motor without an external magnetic bridge. A first air gap 16 is formed between the stator 14 of the motor and the rotor of the synchronous reluctance motor without an external magnetic bridge. The rotor for a synchronous reluctance motor without an external magnetic bridge includes a first rotor core 11 , a first skeleton 12 of non-magnetic material and a plurality of first iron core pieces 13 . The first non-magnetic material skeleton 12 includes a first lower end cover 121 and a plurality of first skeleton sheet groups 122 arranged on the first lower end cover 121, and the shapes of the plurality of first skeleton sheet groups 122 are similar to those in the prior art. The shape of the inner magnetic bridge is similar. The first rotor core 11 may be a first rotor non-magnetic material core or a first rotor core, and both the first rotor core and the first iron core block 13 are silicon steel sheets. The interior of the first rotor non-magnetic material core is made of non-magnetic material. The first non-magnetic material skeleton 12 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the first frame sheet group 122 made of non-magnetic material is used to replace the external magnetic bridge and magnetic barrier in the prior art, which can not only enhance the mechanical strength of the rotor, but also prevent magnetic flux leakage.

Specifically, referring to Fig. 10 to Fig. 12, in some embodiments, since the shape of the rotor is a cylinder, the first lower end cover 121 is disc-shaped, and a plurality of first skeleton sheet groups 122 are uniformly distributed on the second end cover along the circumferential direction. On the end cover 121. The first skeleton sheet group 122 includes a first skeleton sheet 124 and a plurality of second skeleton sheets 123 arranged radially, and the first skeleton sheet 124 is arranged near the outer edge of the first lower end cover 121 . The opening size of the second skeleton piece 123 increases sequentially from inside to outside, and there is a first gap between two adjacent second skeleton pieces 123 or between the first skeleton piece 124 and the second skeleton piece 123 located outside. Both the first rotor core 11 and the first iron core block 13 are connected to the first lower end cover 121, and the first rotor core 11 is located at the center of the first lower end cover 121, and the first iron core block 13 is located at the second within the gap. The first lower end cover 121 and the first frame sheet group 122 are separate parts, the first lower end cover 121 and the first frame sheet group 122 are made of non-magnetic materials, and the first frame sheet group 122 is made of resin , plastics and adhesives, etc. The first lower end cover 121 is provided with a plurality of first iron core positioning slots 125 for fixing the first iron core block 13 . The processing method of this embodiment is as follows:

Referring to Fig. 11 to Fig. 13, silicon steel sheets or other magnetically permeable materials are made into first iron core pieces 13 by means of pin connection, welding, die-casting or bonding, and pin holes can be set on the first iron core pieces 13 131. The first rotor core body 11 and the first core block 13 are the magnetically conductive structure of the motor rotor (the inner magnetic bridge of the synchronous reluctance motor). Then the first rotor core body 11 and the first core pieces 13 are placed together according to preset positions to form the motor rotor core. Specifically, the lower ends of the first iron core pieces 13 can be respectively plugged into the corresponding first iron core positioning grooves 125, and then the first lower end cover 121 is combined with the first rotor core body 11 and the first iron core. Materials such as resin, plastic, and adhesive are poured into the gaps between the blocks 13. After these materials are cured, the first lower end cover 121 can be firmly connected to the first rotor core body 11 and the first core block 13. stick together firmly.

In some embodiments, referring to FIGS. 14 to 16 , the first lower end cover 121 and the plurality of first skeleton sheet groups 122 are integrated, and the first lower end cover 121 can be made by machining, injection molding, 3D printing, casting or mold forming. Non-magnetic material skeleton 12. It should be noted that: the first non-magnetic material frame 12 can be directly made into a whole, or a plurality of parts can be connected into one frame by bonding. Then insert the first rotor core body 11 and the first iron core block 13 into the frame groove, and use glue to reinforce the first non-magnetic material frame 12 with the first rotor core body 11 and the first iron core. Block 13 is fixed as one.

In some embodiments, referring to FIG. 17 to FIG. 19 , the first non-magnetic material skeleton 12 includes a first skeleton sheet group 122 and first upper end caps 126 respectively disposed at the upper and lower ends of the first skeleton sheet group 122 . The first upper end cover 126 is provided with a first positioning groove 127 , and the upper end of the first skeleton piece set 122 is inserted into the first positioning groove 127 . Therefore, during processing, the second skeleton sheet 124 and the first skeleton sheet 123 in the first skeleton sheet group 122 are first manufactured by machining, injection molding, 3D printing or mold forming, and then the first skeleton sheet group 122 is plugged together. In the first positioning groove 127, the first rotor core body 11 and the first iron core block 13 are embedded in the skeleton groove, and finally the first non-magnetic material skeleton 12, the first rotor core body 11 and The first iron core piece 13 is fixed as a whole.

In some other embodiments, there is no positioning groove on the first upper end cover 126 , and the first skeleton sheet group 122 is tightly clamped between the first upper end cover 126 and the first lower end cover 121 .

Referring to Fig. 20 and Fig. 21, the embodiment of the present application also provides a rotor 20 for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge arranged in a permanent magnet assisted synchronous reluctance motor, a permanent magnet assisted synchronous reluctance motor Similar to the structure of the synchronous reluctance motor, the only difference is that the rotor 20 for the permanent magnet assisted synchronous reluctance motor without an external magnetic bridge also includes a first permanent magnet 24, so the structure of the permanent magnet assisted synchronous reluctance motor will not be detailed here. stated.

The rotor 20 for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge includes a second rotor core 21 , a second non-magnetic material skeleton 22 , a plurality of second core pieces 23 and a plurality of first permanent magnets 24 . The second non-magnetic material frame 22 includes a second lower end cover 221 and a plurality of second frame sheet groups 222 disposed on the second lower end cover 221 . The shape of the plurality of second frame sheet groups 222 is similar to that of the inner magnetic bridge in the prior art. Both the second rotor core 21 and the second core block 23 are silicon steel sheets. The first non-magnetic material skeleton 12 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the second frame sheet group 222 made of non-magnetic material is used to replace the external magnetic bridge and magnetic barrier in the prior art, which can not only enhance the mechanical strength of the rotor, but also prevent magnetic flux leakage.

Specifically, referring to Fig. 20 to Fig. 23, in some embodiments, since the shape of the rotor is a cylinder, the second lower end cover 221 is disc-shaped, and a plurality of second skeleton sheet groups 222 are evenly distributed on the second end cover along the circumferential direction. On the lower end cover 221. The second skeleton sheet group 222 includes a third skeleton sheet 223 arranged radially and a plurality of fourth skeleton sheets 224 disconnected in the middle, and the third skeleton sheet 223 is arranged near the outer edge of the second lower end cover 221, that is, the fourth skeleton sheet The skeleton piece 224 includes a left half and a right half. The opening size of the fourth skeleton piece 224 increases sequentially from the inside to the outside. Between two adjacent fourth skeleton pieces 224 or between the third skeleton piece 223 and the fourth skeleton piece 224 There are gaps in between. The second rotor iron core 21, the second iron core block 23 and the first permanent magnet 24 are all connected on the second lower end cover 221, and the second rotor iron core 21 is located at the center of the second lower end cover 221, and the second iron core The block 23 is located in the gap between two adjacent fourth skeleton pieces 224 or in the gap between the third skeleton piece 223 and the fourth skeleton piece 224 located outside, and the first permanent magnet 24 is located in the fourth skeleton piece 224 between the left half and the right half. The second lower end cover 221 and the second frame sheet set 222 are separate parts, both of which are made of non-magnetic materials, and the second frame sheet set 222 is made of resin, plastic and adhesive. The second lower end cover 221 is provided with a plurality of second iron core positioning slots 225 for fixing the second iron core block 23 and permanent magnet positioning slots 228 for fixing the first permanent magnet 24 . The processing method of this embodiment is as follows:

Referring to FIGS. 20 to 23 , silicon steel sheets or other magnetically permeable materials are made into a second iron core block 23 by pin connection, welding, die-casting or bonding. The second rotor core 21 and the second core block 23 are the magnetically conductive structure of the motor rotor (the inner magnetic bridge of the permanent magnet assisted synchronous reluctance motor). Then the second rotor core 21 , the second core pieces 23 and the first permanent magnets 24 are placed together according to preset positions to form the motor rotor core. Specifically, the lower ends of the second iron core pieces 23 can be inserted in the corresponding second iron core positioning grooves 225 respectively, and the lower ends of the first permanent magnets 24 can be respectively inserted in the corresponding permanent magnet positioning grooves 228, and then In the gap between the second lower end cover 221 and the second rotor core 21 and the second iron core block 23, materials such as resin, plastic, and adhesive are poured, and when these materials are cured, the second lower end cover can be 221 is firmly bonded with the second rotor core 21 , the second core piece 23 and the first permanent magnet 24 .

In some embodiments, referring to Fig. 24 to Fig. 26, the second lower end cover 221 and the plurality of second skeleton sheet groups 222 are integrated, and the second non-woven fabric can be made by machining, injection molding, 3D printing, casting or mold forming. Magnetic material skeleton 22 . It should be noted that: the second non-magnetic material frame 22 can be directly made into a whole, or a plurality of parts can be connected into one frame by bonding. Then the second rotor iron core 21 and the second iron core block 23 are embedded in the skeleton groove, and the second non-magnetic material skeleton 22 is connected with the second rotor iron core 21 and the second iron core block 23 in the way of glue reinforcement. Fixed as one.

In some embodiments, referring to FIG. 27 , the second non-magnetic material skeleton 22 includes a first skeleton sheet group 222 and second upper end caps respectively disposed at the upper and lower ends of the second skeleton sheet group 222 . The second upper end cover is provided with a second positioning groove, and the two ends of the second skeleton sheet group 222 are inserted into the second positioning groove. Therefore, during processing, the fourth skeleton sheet 224 and the third skeleton sheet 223 in the second skeleton sheet group 222 are first produced by machining, injection molding, 3D printing or mold forming, and then the second skeleton sheet group 222 is plugged In the second positioning groove, insert the second rotor iron core body and the second iron core block into the skeleton groove, and finally use glue to reinforce the second non-magnetic material skeleton 22, the second rotor iron core body and The second iron core block is fixed as a whole.

In some other embodiments, there is no positioning groove on the second upper end cover 226 , and the second frame piece set 222 is tightly clamped between the first upper end cover 126 and the second lower end cover 221 .

Referring to Figure 28 to Figure 30, the embodiment of the present application also provides a rotor 30 for an internal permanent magnet synchronous motor without external magnetic bridge spokes, including a third non-magnetic material skeleton 32, a plurality of third iron cores Block 31 and a plurality of spoke-shaped permanent magnets 33. The third non-magnetic material skeleton 32 includes a third lower end cap 321 and a first annular skeleton 322 arranged on the third lower end cap 321, the outer periphery of the first annular skeleton 322 is provided with a plurality of fifth skeleton pieces 323 uniformly distributed along the circumferential direction The spoke-shaped permanent magnets 33 are connected between the first annular skeleton 322 and the corresponding fifth skeleton piece 323 , and the third iron core block 31 is located between two adjacent spoke-shaped permanent magnets 33 . The third iron core block 31 is made of silicon steel. The third non-magnetic material skeleton 32 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the first annular frame 322 and the fifth frame piece 323 made of non-magnetic materials are used to replace the outer magnetic bridge in the prior art, which can not only enhance the mechanical strength of the rotor, but also prevent magnetic flux leakage.

Specifically, referring to FIGS. 28 to 30 , in some embodiments, since the shape of the rotor is a cylinder, the third lower end cover 321 is disc-shaped, and the first annular skeleton 322 is arranged at the center of the third lower end cover 321 The outer periphery of the first annular skeleton 322 is provided with a plurality of fifth skeleton pieces 323 uniformly distributed along the circumferential direction, and the fifth skeleton pieces 323 are arranged near the outer edge of the third lower end cover 321 . Both the spoke-shaped permanent magnet 33 and the third iron core piece 31 are connected on the third lower end cover 321, and the spoke-shaped permanent magnet 33 is connected between the first annular skeleton 322 and the corresponding fifth skeleton piece 323, and the third iron core The core piece 31 is located between two adjacent spoke-shaped permanent magnets 33 .

The third lower end cover 321 , the first ring frame 322 and the fifth frame piece 323 are all made of non-magnetic materials, and the first ring frame 322 and the fifth frame piece 323 are made of resin, plastic and adhesive. The third lower end cover 321 is provided with a plurality of third iron core positioning grooves 325 for fixing the third iron core block 33 and spoke-shaped permanent magnet fixing grooves 326 for fixing the spoke-shaped permanent magnets 33 . The processing method of this embodiment is as follows:

Referring to Fig. 28 to Fig. 30, the third iron core block 31 made of silicon steel or other magnetically permeable materials and the spoke-shaped permanent magnet 33 are placed together according to preset positions to form the motor rotor core. Specifically, the lower ends of the third iron core piece 31 and the spoke-shaped permanent magnet 33 can be respectively inserted into the corresponding third iron core positioning groove 325 and the spoke-shaped permanent magnet fixing groove 326, and then the third lower end cover 321 Materials such as resin, plastics and adhesives are poured into the gap between the third iron core piece 31 and the spoke-shaped permanent magnet 33. After these materials are solidified, the third lower end cover 321 can be combined with the third iron core. The blocks 31 and the spoke-shaped permanent magnets 33 are firmly bonded together.

In some embodiments, referring to Fig. 31 and Fig. 32, the third lower end cover 321, the first annular skeleton 322 and the fifth skeleton piece 323 are integrated, which can be made by machining, injection molding, 3D printing, casting or mold forming. The third non-magnetic material skeleton 32 . Then the third iron core piece 31 and the spoke-shaped permanent magnet 33 are embedded in the skeleton groove, and the third non-magnetic material skeleton 32 and the third iron core piece 31 and the spoke-shaped permanent magnet 33 are fixed in the form of glue reinforcement. One.

In some embodiments, referring to FIG. 33 to FIG. 35 , the third non-magnetic material skeleton 32 includes a first ring-shaped skeleton 322 , a fifth skeleton piece 323 and a third upper end cap 327 disposed at the upper and lower ends thereof. The third upper end cover 327 is provided with a first annular skeleton positioning groove 328 and a first skeleton sheet positioning groove 329, the two ends of the first annular skeleton positioning groove 328 are inserted in the first annular skeleton positioning groove 328, and the fifth skeleton sheet The two ends of 323 are inserted into the positioning groove 329 of the first skeleton piece. Therefore, during processing, the first annular skeleton 322 and the fifth skeleton piece 323 are manufactured by machining, injection molding, 3D printing or mold forming, and then the second skeleton piece group 222 is inserted into the corresponding positioning groove, and then Embed the third iron core assembly 31 and the spoke-shaped permanent magnet 33 into the skeleton groove, and finally fix the third non-magnetic material skeleton 32, the third iron core assembly 31 and the spoke-shaped permanent magnet 33 into one body by reinforcing with glue.

Referring to Figure 36 to Figure 38, the embodiment of the present application also provides a rotor 40 for an embedded permanent magnet synchronous motor without an external magnetic bridge, including a fourth non-magnetic material skeleton 42, a plurality of fourth iron core pieces 41 and a plurality of "V"-shaped permanent magnets 43; the fourth non-magnetic material skeleton 42 includes a fourth lower end cover 421 and a sixth skeleton piece 422 arranged on the fourth lower end cover 421; the sixth skeleton piece 422 is uniformly distributed along the circumferential direction On the fourth lower end cover 421, the "V"-shaped permanent magnet 43 is connected between two adjacent sixth skeleton pieces 422, and the fourth iron core piece 41 is connected between two adjacent sixth skeleton pieces 422 And it is located outside the “V”-shaped permanent magnet 43 . The fourth iron core block 41 is made of silicon steel. The fourth non-magnetic material skeleton 42 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the sixth skeleton piece 422 made of non-magnetic material is used to replace the external magnetic bridge in the prior art, which can not only enhance the mechanical strength of the rotor, but also prevent magnetic flux leakage.

Specifically, referring to Fig. 35 to Fig. 38, in some embodiments, since the shape of the rotor is a cylinder, the fourth lower end cover 421 is disc-shaped, and the sixth skeleton piece 422 is evenly distributed on the fourth lower end cover 421 along the circumferential direction. superior. Both the "V" shaped permanent magnet 43 and the fourth iron core piece 41 are connected on the fourth lower end cover 421, the "V" shaped permanent magnet 43 is connected between two adjacent sixth skeleton pieces 422, and the fourth The iron core block 41 is connected between two adjacent sixth skeleton pieces 422 and is located outside the “V”-shaped permanent magnet 43 .

Both the fourth lower end cover 421 and the sixth frame piece 422 are made of non-magnetic materials, and the sixth frame piece 422 is made of resin, plastic and adhesive, etc., and the fourth lower end cover 421 is provided with a plurality of The fourth iron core positioning groove 423 of the fourth iron core block 41 . The processing method of this embodiment is as follows:

Referring to Fig. 35 to Fig. 38, the fourth iron core piece 41 made of silicon steel or other magnetically permeable materials and the "V"-shaped permanent magnet 43 are placed together according to preset positions to form the motor rotor iron core. Specifically, the lower end of the fourth iron core block 41 can be inserted into the fourth iron core positioning groove 423, and then between the fourth lower end cover 421, the fourth iron core block 41 and the "V"-shaped permanent magnet 43 resin, plastic, adhesive and other materials are poured into the gap between them, and when these materials are solidified, the fourth lower end cover 421 can be firmly bonded to the fourth iron core piece 41 and the "V"-shaped permanent magnet 43 together.

In some embodiments, referring to FIG. 39 and FIG. 40 , the fourth lower end cover 421 and the sixth skeleton piece 422 are integrated, and the fourth non-magnetic material can be made by machining, injection molding, 3D printing, casting or mold forming. Skeleton42. Then the fourth iron core piece 41 and the "V" shape permanent magnet 43 are embedded in the skeleton groove, and the fourth non-magnetic material skeleton 42 is connected with the fourth iron core piece 41 and the "V" shape permanent magnet by means of glue reinforcement. The magnet 43 is fixed as a whole.

In some embodiments, referring to FIG. 41 to FIG. 43 , the fourth non-magnetic material skeleton 42 includes a sixth skeleton piece 422 and fourth upper end caps 424 disposed at the upper and lower ends thereof. The fourth upper end cover 424 is provided with a sixth framework piece positioning groove 425 , and both ends of the sixth framework piece 422 are inserted into the sixth framework piece positioning groove 425 . Therefore, during processing, the sixth skeleton piece 422 is first produced by machining, injection molding, 3D printing or mold forming, and then the sixth skeleton piece 422 is inserted into the corresponding positioning groove, and then the fourth iron core piece is assembled 41 and the "V"-shaped permanent magnet 43 are embedded in the skeleton groove, and finally the fourth non-magnetic material skeleton 42, the fourth iron core block 41 and the "V"-shaped permanent magnet 43 are fixed together by glue reinforcement. Referring to Figure 44 to Figure 46, the embodiment of the present application also provides a rotor 50 for an embedded permanent magnet synchronous motor without an external magnetic bridge, including a fifth non-magnetic material skeleton 52, a plurality of fifth iron core pieces 51 and a plurality of "U" shaped permanent magnets 53. The fifth non-magnetic material skeleton 52 includes the fifth lower end cap 521 and the third outer skeleton sheet 522 arranged on the fifth lower end cap 521; the third outer skeleton sheet 522 is evenly distributed on the fifth lower end cap 521 along the circumferential direction, "U The "shaped permanent magnet 53 is connected between two adjacent third outer frame pieces 522, and the fifth iron core piece 51 is connected between the adjacent two third outer frame pieces 522 and is located at the "U" shaped permanent magnet 53 outside. The fifth iron core block 51 is made of silicon steel. The fifth non-magnetic material skeleton 50 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the third outer frame piece 522 made of non-magnetic material is used to replace the outer magnetic bridge in the prior art, which can not only enhance the mechanical strength of the rotor, but also prevent magnetic flux leakage.

Specifically, referring to Figures 44 to 46, in some embodiments, since the shape of the rotor is a cylinder, the fifth lower end cover 521 is disc-shaped, and the third outer skeleton piece 522 is evenly distributed on the fifth lower end cover along the circumferential direction. 521 on. The "U" shaped permanent magnet 53 and the fifth iron core piece 51 are all connected on the fifth lower end cover 521, the "U" shaped permanent magnet 53 is connected between two adjacent third outer skeleton pieces 522, and the fifth The five-core block 51 is connected between two adjacent third outer frame pieces 522 and is located outside the “U”-shaped permanent magnet 53 .

Both the fifth lower end cover 521 and the third outer frame piece 522 are made of non-magnetic materials, and the third outer frame piece 522 is made of resin, plastic and adhesive, etc., and the fifth lower end cover 521 is provided with a plurality of The fourth iron core positioning groove 423 of the fifth iron core block 51 is fixed. The processing method of this embodiment is as follows:

Referring to Fig. 44 to Fig. 46, the fifth iron core piece 51 made of silicon steel or other magnetically permeable materials and the "U"-shaped permanent magnet 53 are placed together according to preset positions to form the motor rotor core. Specifically, the lower end of the fifth iron core block 51 can be inserted into the fourth iron core positioning groove 423, and then the fifth lower end cover 521, the fifth iron core block 51 and the "U"-shaped permanent magnet 53 Materials such as resin, plastic, and adhesive are poured into the gap between them. When these materials are cured, the fifth lower end cover 521 can be firmly bonded to the fifth iron core block 51 and the "U"-shaped permanent magnet 53. together.

In some embodiments, referring to Fig. 47 and Fig. 48, the fifth lower end cover 521 and the third outer skeleton piece 522 are integrated, and the fifth non-magnetically conductive Material Skeleton 50. Then the fifth iron core piece 51 and the "U" shape permanent magnet 53 are embedded in the skeleton groove, and the fifth non-magnetic material skeleton 50 is connected with the fifth iron core piece 51 and the "U" shape permanent magnet in the way of glue reinforcement. The magnet 53 is fixed as a whole.

In some embodiments, referring to FIG. 49 to FIG. 51 , the fifth non-magnetic material skeleton 50 includes a third outer skeleton piece 522 and fifth upper end caps 524 disposed at its upper and lower ends. The fifth upper end cover 524 is provided with a positioning groove 525 for a third outer frame piece, and both ends of the third outer frame piece 522 are inserted into the positioning groove 525 for the third outer frame piece. Therefore, during processing, the third outer skeleton piece 522 is manufactured by machining, injection molding, 3D printing or mold forming, and then the third outer skeleton piece 522 is inserted into the corresponding positioning groove, and then the fifth iron core The block 51 and the "U"-shaped permanent magnet 53 are embedded in the skeleton groove, and finally the fifth non-magnetic material skeleton 50, the fifth iron core block 51 and the "U"-shaped permanent magnet 53 are fixed as a whole by means of glue reinforcement .

Referring to Figure 52 to Figure 54, the embodiment of the present application also provides a rotor 60 for an embedded permanent magnet synchronous motor without an external magnetic bridge, including a sixth non-magnetic material skeleton 62, a plurality of sixth iron core pieces 61 and a plurality of "one" shaped permanent magnets 63. The sixth non-magnetic material skeleton 62 includes a sixth lower end cap 621 and a fourth outer skeleton sheet 622 arranged on the sixth lower end cap 621; the fourth outer skeleton sheet 622 is evenly distributed on the sixth lower end cap 621 along the circumferential direction, "a The "shaped permanent magnet 63 is connected between two adjacent fourth outer skeleton pieces 622, and the sixth iron core piece 61 is connected between two adjacent fourth outer skeleton pieces 622 and is located in the "one" shaped permanent magnet 63 outside. The sixth iron core block 61 is made of silicon steel. The sixth non-magnetic material skeleton 62 is made of non-magnetic material, and the non-magnetic material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the fourth outer frame piece 622 made of non-magnetic material is used to replace the outer magnetic bridge in the prior art, which can not only enhance the mechanical strength of the rotor, but also prevent magnetic flux leakage.

Specifically, referring to Fig. 52 to Fig. 54, in some embodiments, since the shape of the rotor is a cylinder, the sixth lower end cap 621 is disc-shaped, and the fourth outer skeleton piece 622 is evenly distributed on the sixth lower end cap along the circumferential direction. 621 on. The "one"-shaped permanent magnet 63 and the sixth iron core piece 61 are all connected on the sixth lower end cover 621, and the "one"-shaped permanent magnet 63 is connected between two adjacent fourth outer skeleton pieces 622, and the first The six iron core blocks 61 are connected between two adjacent fourth outer frame pieces 622 and are located outside the “one” shaped permanent magnet 63 .

Both the sixth lower end cover 621 and the fourth outer frame piece 622 are made of non-magnetic materials, and the fourth outer frame piece 622 is made of resin, plastic and adhesive, etc. The sixth lower end cover 621 is provided with a plurality of The fourth iron core positioning slot 423 of the sixth iron core block 61 is fixed. The processing method of this embodiment is as follows:

Referring to Fig. 52 to Fig. 54, the sixth iron core piece 61 made of silicon steel or other magnetically permeable materials and the "one"-shaped permanent magnet 63 are placed together according to preset positions to form the motor rotor iron core. Specifically, the lower end of the sixth iron core block 61 can be inserted into the fourth iron core positioning groove 423, and then between the sixth lower end cover 621, the sixth iron core block 61 and the "one"-shaped permanent magnet 63 Materials such as resin, plastic, and adhesive are poured into the gaps between them. When these materials are solidified, the sixth lower end cover 621 can be firmly bonded to the sixth iron core piece 61 and the "one"-shaped permanent magnet 63. together.

In some embodiments, referring to Fig. 55 and Fig. 56, the sixth lower end cover 621 and the fourth outer skeleton piece 622 are integrated, and the sixth non-magnetically conductive Material Skeleton62. Then the sixth iron core piece 61 and the "one" shape permanent magnet 63 are embedded in the skeleton groove, and the sixth non-magnetic material skeleton 62 is connected with the sixth iron core piece 61 and the "one" shape permanent magnet by means of glue reinforcement. The magnet 63 is fixed as a whole.

In some embodiments, referring to FIG. 57 to FIG. 59 , the sixth non-magnetic material skeleton 62 includes a fourth outer skeleton piece 622 and fifth upper end caps 524 disposed at its upper and lower ends. The fifth upper end cover 524 is provided with a positioning groove 525 for the third outer frame piece, and the two ends of the fourth outer frame piece 622 are inserted into the positioning groove 525 for the third outer frame piece. Therefore, during processing, the fourth outer skeleton piece 622 is first produced by machining, injection molding, 3D printing or mold forming, and then the fourth outer skeleton piece 622 is inserted into the corresponding positioning groove, and then the sixth iron core The block 61 and the "one"-shaped permanent magnet 63 are embedded in the skeleton groove, and finally the sixth non-magnetic material skeleton 62, the sixth iron core block 61 and the "one"-shaped permanent magnet 63 are fixed as a whole by means of glue reinforcement .

Similarly, in addition to the inner rotor motor, the embodiments of the present application are also applicable to the structure of the outer rotor motor, and Fig. 60 to Fig. 65 show the designed structure of the outer rotor motor without an inner magnetic bridge.

Referring to FIG. 60 , an embodiment of the present application provides an outer rotor synchronous reluctance motor without an inner magnetic bridge structure. The outer rotor synchronous reluctance motor includes a motor stator 17, a motor winding 16 and a rotor for a synchronous reluctance motor without an inner magnetic bridge. A first air gap 18 is formed between the motor stator 17 and the synchronous reluctance motor rotor without inner magnetic bridge outer rotor. The rotor for synchronous reluctance motor without inner magnetic bridge and outer rotor includes a first non-magnetic material skeleton 12 and a plurality of first iron core pieces 13, the first iron core 13 pieces are U-shaped and radially from the inside to the The outer openings increase sequentially. The non-magnetic material skeleton 12 includes a first skeleton sheet group 112 , a first skeleton 128 arranged on a radially outer circle of the rotor, and a second skeleton 129 arranged on a radially inner circle of the rotor.

Referring to Fig. 61, the embodiment of the present application also provides a permanent magnet assisted synchronous reluctance motor structure without an inner magnetic bridge and an outer rotor. A magnetic material bone 22 , a plurality of second iron core pieces 23 and a first permanent magnet 24 . The second iron core block 23 is U-shaped, and the openings in the radial direction increase sequentially from the inside to the outside. The second non-magnetic material skeleton 22 includes a second skeleton sheet group 212 disconnected in the middle, a third skeleton 228 arranged on the radially outer circle of the rotor and a fourth skeleton 229 arranged on the radially inner circle of the rotor, and the second permanent magnet 24 is embedded between the second iron core block 23 and the second skeleton sheet group 212 with the middle disconnected.

Referring to Figures 62 to 65, the examples of this application are also applied to the permanent magnet synchronous motor with embedded outer rotor. According to the different arrangements of the permanent magnets of the outer rotor of the embedded permanent magnet synchronous motor, it is divided into spoke type (Figure 62), V type (Fig. 63), U type (Fig. 64), type I (Fig. 65), etc.

Referring to FIG. 62 , the embodiment of the present application provides a permanent magnet synchronous motor structure without inner magnetic bridge and outer rotor spoke type. The rotor of the permanent magnet synchronous motor without inner magnetic bridge and outer rotor spoke type includes a third non-magnetic material skeleton 32 , a plurality of third iron core pieces 31 and spoke-shaped permanent magnets 33 . The third non-magnetic material skeleton 32 includes a first ring-shaped skeleton 322 and a fifth skeleton piece 323, the first ring-shaped skeleton 322 is located on the outside, the fifth skeleton piece 323 is located on the inside and is a dovetail-shaped skeleton piece, and the spoke-shaped permanent magnet 33 is embedded in The third iron core blocks 31 are embedded in the positioning grooves of the third non-magnetic material skeleton 32 .

Referring to FIG. 63 , the embodiment of the present application provides a structure of a V-type permanent magnet synchronous motor without an inner magnetic bridge and an outer rotor. The rotor of the V-type permanent magnet synchronous motor without an inner magnetic bridge and an outer rotor includes a fourth non-magnetic material skeleton 42 , a plurality of fourth iron core pieces 41 and a “V” shaped permanent magnet 43 . The fourth non-magnetic material skeleton 42 includes a non-magnetic material skeleton 422 on the outside of the fourth rotor and a non-magnetic material skeleton 423 arranged on the inner side of the rotor radial direction, and the fourth iron core block 41 includes an iron core block arranged on the outer side of the rotor 411 and the iron core block 412 arranged on the inner side. "V" shaped permanent magnets 43 are embedded between the inner and outer iron core pieces of the rotor.

Referring to FIG. 64 , the embodiment of the present application provides a U-shaped permanent magnet synchronous motor structure without an inner magnetic bridge and an outer rotor. The rotor of the U-shaped permanent magnet synchronous motor without an inner magnetic bridge and an outer rotor includes a fifth non-magnetic material skeleton 52 , a plurality of fifth iron core pieces 51 and a "U"-shaped permanent magnet 53. The fifth non-magnetic material skeleton 52 is arranged on the inner side of the rotor close to the stator, the fifth iron core block 51 includes the rotor outer iron core block 511 and the rotor inner rotor iron core block 512, and the "U" shaped permanent magnet 53 is embedded in the The fifth iron core is put together between the inner and outer iron core pieces of 51.

Referring to FIG. 65 , the embodiment of the present application provides a permanent magnet synchronous motor structure without inner magnetic bridge and outer rotor. The rotor of the permanent magnet synchronous motor without inner magnetic bridge and outer rotor includes a sixth non-magnetic material skeleton 62 , the sixth iron core piece 61 and the "one" shaped permanent magnet 63. The non-magnetic material skeleton 62 is arranged on the outer circle of the rotor, and the "one"-shaped permanent magnet 63 is embedded between the sixth non-magnetic material skeleton 62 and embedded on the sixth iron core 61 .

The above are only specific implementation methods of this application, but the protection scope of this application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application shall be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A rotor for a synchronous reluctance motor without an external magnetic bridge, characterized in that it includes a first rotor core, a first non-magnetic material skeleton and a plurality of first iron core pieces; the first non-magnetic material skeleton includes The first lower end cover and a plurality of first skeleton sheet groups arranged on the first lower end cover, the plurality of first skeleton sheet groups are evenly distributed on the first lower end cover along the circumferential direction; the first lower end cover is uniformly distributed; A skeleton sheet group includes a first skeleton sheet and a plurality of second skeleton sheets arranged radially, and there is a first gap between two adjacent second skeleton sheets or between the first skeleton sheet and the second skeleton sheet;

Both the first iron core block and the first rotor core are connected to the first lower end cover, and the first rotor core is concentric with the motor shaft; the first iron core block is located on the first within a gap.
The rotor for a synchronous reluctance motor without an external magnetic bridge according to claim 1, wherein the first rotor core is located at the center of the first lower end cover, and the first skeleton piece is close to the first The outer edge of the lower end cover is arranged, and the opening size of the second skeleton piece increases sequentially from the inside to the outside.
The rotor for a synchronous reluctance motor without an external magnetic bridge according to claim 2, further comprising a first upper end cover arranged on the top of the first frame sheet group, and the first frame sheet group is clamped between the first upper end cap and the first lower end cap.
The rotor for synchronous reluctance motor without external magnetic bridge according to claim 3, characterized in that, the first upper end cover is provided with a first positioning groove, and the upper end of the first skeleton sheet group is inserted into the Inside the first positioning groove of the upper end cover.
The rotor for a synchronous reluctance motor without an external magnetic bridge according to claim 2, wherein the first rotor core is a first rotor non-magnetic material core or a first rotor iron core.
A rotor for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge, characterized in that it includes a second rotor core, a second non-magnetic material skeleton, a plurality of second iron core pieces and a plurality of first permanent magnets; The second non-magnetic material skeleton includes a second lower end cap and a plurality of second skeleton sheet groups arranged on the second lower end cap; the plurality of second skeleton sheet groups are evenly distributed on the second On the lower end cover; the second skeleton sheet group includes a third skeleton sheet radially arranged and a plurality of fourth skeleton sheets disconnected in the middle, between two adjacent fourth skeleton sheets or between the third skeleton sheet and the first skeleton sheet There are second gaps between the four skeleton sheets;

The second rotor core, the second iron core block and the first permanent magnet are all connected to the second lower end cover, and the second rotor core is concentric with the motor shaft, and the second iron core The core block is located in the second gap, and the first permanent magnet is located at the disconnection of the fourth skeleton piece.
The rotor for permanent magnet assisted synchronous reluctance motor without external magnetic bridge according to claim 6, wherein the second rotor core is located at the center of the second lower end cover, and the second skeleton piece is close to the The outer edge of the second lower end cover is arranged, and the opening size of the fourth skeleton piece increases sequentially from the inside to the outside.
The rotor for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge according to claim 7, further comprising a second upper end cover arranged on the top of the second frame sheet group, and the second frame sheet group Clamped between the second upper end cap and the second lower end cap.
The rotor for permanent magnet assisted synchronous reluctance motor without external magnetic bridge according to claim 8, characterized in that, the second upper end cover is provided with a second positioning groove, and the upper end of the second frame sheet group is plugged into in the second positioning slot.
The rotor for permanent magnet assisted synchronous reluctance motor without external magnetic bridge according to claim 7, wherein the second rotor core is a second rotor non-magnetic material core or a second rotor iron core.
A rotor for a spoke-type embedded permanent magnet synchronous motor without an external magnetic bridge, characterized in that it includes a third non-magnetic material skeleton, a plurality of third iron core pieces and a plurality of spoke-type permanent magnets; the first The three non-magnetic material skeletons include a third lower end cap and a first annular skeleton arranged on the third lower end cap, and a plurality of fifth skeleton pieces uniformly distributed along the circumference of the third lower end cap; the permanent magnet Connected between the first annular skeleton and the corresponding fifth skeleton piece, the third iron core piece is located between two adjacent spoke-shaped permanent magnets.
The rotor for an internal permanent magnet synchronous motor without external magnetic bridge spokes according to claim 11, wherein the plurality of fifth skeleton pieces are all located outside the first annular skeleton.
The rotor for internal permanent magnet synchronous motor without external magnetic bridge spokes according to claim 12, further comprising a third upper end cover arranged on the top of the fifth skeleton piece, and the first annular skeleton and the fifth skeleton piece are clamped between the third upper end cap and the third lower end cap.
According to claim 13, the rotor for a spoke type built-in permanent magnet synchronous motor without an external magnetic bridge is characterized in that, the third upper end cover is provided with a first ring-shaped skeleton positioning groove and a fifth skeleton piece positioning groove, The upper end of the first annular skeleton is inserted into the positioning groove of the first annular skeleton, and the upper end of the fifth skeleton piece is inserted into the positioning groove of the fifth skeleton piece.
A rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge, characterized in that it includes a fourth non-magnetic material skeleton, a plurality of fourth iron core pieces and a plurality of second permanent magnets; the fourth non-magnetic The skeleton of the magnetically permeable material includes a fourth lower end cover and a sixth skeleton piece arranged on the fourth lower end cover; the sixth skeleton piece is evenly distributed on the fourth lower end cover along the circumferential direction, and the second permanent magnet is connected to Between two adjacent sixth skeleton pieces, the fourth iron core piece connects between two adjacent sixth skeleton pieces and is located outside the second permanent magnet.
The rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge 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. Permanent magnets.
The rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge according to claim 15, further comprising a fourth upper end cover arranged on the top of the sixth skeleton piece, and the sixth skeleton piece is clamped Immediately between the fourth lower end cap and the fourth upper end cap.
The rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge according to claim 17, wherein the fourth upper end cover is provided with a fourth positioning groove, and the upper end of the sixth skeleton piece is inserted into the Inside the fourth positioning slot.