CN114448129A - Motor rotor without external magnetic bridge - Google Patents

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

Background technique

Compared with the traditional induction motor (IM), the motor structures such as the embedded 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 Figure 1. Synchronous reluctance motor, including motor stator 011, motor winding 012, outer magnetic bridge 014, magnetic barrier 015, inner magnetic bridge 016 and rotor iron core or rotor non-magnetic material core 017, wherein, motor stator 011 and outer magnetic bridge 014 An air gap 013 is formed therebetween. The purpose of the magnetic barrier 015 is to block the magnetic circuit, so that the magnetic resistance of the magnetic field along the direction perpendicular to the magnetic barrier increases. The function of the inner magnetic bridge 016 is opposite to that of the magnetic barrier 015 , and its function is to reduce the magnetic resistance 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 high magnetic permeability. Since the reluctance in the d-axis and q-axis directions in the figure is different, based on the "minimum reluctance principle", the rotating magnetic field generated by the windings 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 together to ensure the mechanical strength of the entire rotor. However, in the prior art solution, the outer magnetic bridge 014 and the inner magnetic bridge 016 are usually integrated (both are 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 (magnetic flux leakage), the outer magnetic bridge 014 is usually made very thin, so that the magnetic field flowing through the outer magnetic bridge 016 is easier to saturate, so as to block the magnetic 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 outer magnetic bridge 014 and the magnetic flux leakage is an important problem that plagues the torque boost of the motor.

The cross-sectional structure of the permanent magnet-assisted synchronous reluctance motor is shown in Figure 2. The permanent magnet assisted synchronous reluctance motor is based on the synchronous reluctance motor, and a 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 permanent magnets of the rotor will also interact with the magnetic field generated by the stator windings to generate electromagnetic torque. Similar to the synchronous reluctance motor, the permanent magnet-assisted synchronous reluctance motor also has the contradiction between the mechanical strength of the external magnetic bridge and the magnetic 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 strength generated by the permanent magnet of the embedded permanent magnet synchronous motor is usually stronger than that of the permanent magnet auxiliary 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 embedded permanent magnet synchronous motor also has the 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 arranging the permanent magnets of the embedded permanent magnet synchronous motor rotor, it can also be divided into V-shaped (Figure 4), U-shaped (Figure 5), I-shaped (Figure 6), etc. Among them, the V-shaped embedded permanent magnet synchronous motor rotor includes V-shaped permanent magnet 041, the U-shaped embedded permanent magnet synchronous motor rotor includes U-shaped permanent magnet 051, and the one-shaped embedded permanent magnet synchronous motor rotor includes a type of permanent magnet synchronous motor. Magnet 061.

In the above-mentioned 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 internal and external magnetic bridges, etc. Taking a reluctance motor as an example, Fig. 7 is a partial magnetic density cloud diagram, and Fig. 8 is an enlarged view of the outer magnetic bridge portion of the magnetic density cloud diagram. In order to avoid magnetic flux leakage, it is necessary to set the width of the above-mentioned outer magnetic bridge of the motor as narrow as possible so that the magnetic circuit is saturated, so that more magnetic fields cannot pass through. 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 auxiliary synchronous reluctance motor and embedded permanent magnet synchronous motor There will be some leakage flux, which greatly reduces the motor torque density and power density.

SUMMARY OF THE INVENTION

Embodiments of the present application provide 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 magnetic flux leakage of the motor, increase the torque density of the motor, and save silicon steel materials.

In order to achieve the above object, in the first aspect, the embodiments of the present application provide a rotor for a synchronous reluctance motor without an external magnetic bridge, which includes a first rotor core, a first non-magnetically conductive material skeleton, and a plurality of first iron cores. The first non-magnetic conductive material skeleton includes a first lower end cover and a plurality of first skeleton sheet groups arranged on the first lower end cover, and the plurality of first skeleton sheet groups are evenly distributed in the circumferential direction. The first lower end is covered; 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. Each of the second frame pieces has a first gap; the first iron core piece and the first rotor core are both connected to the first lower end cover, and the first rotor core is concentric with the motor shaft; The first core piece is located in the first gap.

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

Further, it also includes a first upper end cover disposed on the top of the first skeleton sheet group, and the first skeleton sheet group 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 skeleton 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 conductive material core or a first rotor iron core.

In a second aspect, the embodiments of the present application further provide a rotor for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge, including a second rotor core, a second non-magnetic conductive material skeleton, and a plurality of second iron core pieces and a plurality of first permanent magnets; the second non-magnetic conductive material skeleton includes a second lower end cover and a plurality of second skeleton sheet groups arranged on the second lower end cover; a plurality of the second skeleton sheet groups uniformly distributed on the second lower end cover along 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 that are interrupted 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 piece 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 in the center of the second lower end cover, the second frame piece is arranged close to the outer edge of the second lower end cover, and the opening size of the fourth frame piece is from the inside to the Incrementally outside.

Further, it also includes a second upper end cover disposed on the top of the second skeleton sheet group, and the second skeleton sheet group 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 iron core

In a third aspect, the embodiments of the present application also provide a rotor for a spoke-type embedded permanent magnet synchronous motor without an external magnetic bridge, including a third non-magnetically conductive material skeleton, a plurality of third iron core blocks and a plurality of spoke-type permanent magnet spoke-type permanent magnet; the third non-magnetically conductive material skeleton includes a third lower end cover and a first annular skeleton arranged on the third lower end cover, and a plurality of A fifth skeleton piece that is evenly 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-type permanent magnets between the spoke-type permanent magnets.

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

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

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

In a fourth aspect, the embodiments of the present application further provide a rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge, comprising a fourth non-magnetically conductive material skeleton, a plurality of fourth iron core blocks and a plurality of second a permanent magnet; the fourth non-magnetically conductive material skeleton includes a fourth lower end cover and a sixth skeleton piece disposed on the fourth lower end cover; the sixth skeleton piece is uniformly 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 between the second permanent magnets outside.

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

Further, it also includes a fourth upper end cap disposed on the top of the sixth frame piece, and the sixth frame piece is clamped between the fourth lower end cap and the fourth upper end cap.

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

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

In the embodiment of the present application, the "non-magnetic-conductive material skeleton" is used to replace the outer magnetic bridge of the rotor of the traditional motor, and the inner magnetic bridge of the motor is fixed between the non-magnetic-conductive material skeleton, which not only satisfies the mechanical strength of the motor rotor, but also avoids the external magnetic bridge. The magnetic flux leakage of the magnetic bridge and the distance between the inner magnetic bridge and the stator are reduced. Therefore, the magnetic flux leakage of the rotor is reduced to achieve the effect of improving 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 embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

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

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

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

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

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

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

7 is a partial magnetic density cloud diagram of a reluctance motor in the prior art;

Fig. 8 is a partial enlarged view of a magnetic density cloud diagram of a part of a reluctance motor in the prior art;

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

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

11 is a schematic three-dimensional structural diagram of a first iron core block in a synchronous reluctance motor according to an embodiment of the present application;

12 is a schematic three-dimensional structural diagram of a rotor core in a synchronous reluctance motor according to an embodiment of the present application;

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

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

15 is a schematic structural diagram of another angle of the first non-magnetic conductive material skeleton in the synchronous reluctance motor without an external magnetic bridge according to an embodiment of the present application;

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

17 is a schematic three-dimensional structural diagram of a second skeleton sheet in a synchronous reluctance motor according to an embodiment of the present application;

18 is a schematic three-dimensional structural diagram of a first skeleton plate group in a synchronous reluctance motor according to an embodiment of the present application;

19 is a schematic three-dimensional structural diagram of a rotor in a synchronous reluctance motor according to another embodiment of the present application;

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

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

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

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

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

25 is a schematic structural diagram of another angle of the second non-magnetically conductive material skeleton in the permanent magnet-assisted synchronous reluctance motor according to the embodiment of the present application;

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

27 is a schematic three-dimensional structural diagram of a second skeleton plate group in a permanent magnet-assisted synchronous reluctance motor according to an embodiment of the present application;

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

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

30 is a schematic structural diagram of a third lower end cover in a spoke-type inline permanent magnet synchronous motor according to an embodiment of the present application;

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

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

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

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

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

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

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

38 is a schematic structural diagram of the fourth lower end cover in the V-type inline permanent magnet synchronous motor according to the embodiment of the application;

39 is a schematic structural diagram of a fourth non-magnetically conductive material skeleton in a V-type inline permanent magnet synchronous motor according to an embodiment of the present application;

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

41 is a schematic three-dimensional structural diagram of the sixth skeleton sheet in the embedded permanent magnet synchronous motor of Embodiment V of the application;

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

43 is a schematic three-dimensional structure diagram of a rotor in another embodiment V of the embedded permanent magnet synchronous motor of the present application;

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

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

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

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

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

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

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

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

52 is a schematic cross-sectional structural diagram of a type I embedded permanent magnet synchronous motor according to an embodiment of the present application;

53 is a schematic three-dimensional structure diagram of a rotor iron core in a type 1 embedded permanent magnet synchronous motor according to an embodiment of the present application;

54 is a schematic structural diagram of the sixth lower end cover in the embedded permanent magnet synchronous motor of the first embodiment of the application;

55 is a schematic structural diagram of a sixth non-magnetically conductive material skeleton in a type 1 embedded permanent magnet synchronous motor according to an embodiment of the present application;

56 is a schematic three-dimensional structural diagram of a rotor in a type 1 embedded permanent magnet synchronous motor according to an embodiment of the present application;

57 is a schematic three-dimensional structural diagram of a fourth outer skeleton sheet in a type 1 built-in permanent magnet synchronous motor according to Embodiment 1 of the present application;

58 is a schematic three-dimensional structural diagram of a sixth lower end cover in a type 1 embedded permanent magnet synchronous motor according to an embodiment of the present application;

FIG. 59 is a schematic three-dimensional structure diagram of a rotor in a type 1 embedded permanent magnet synchronous motor according to another embodiment of the present application.

FIG. 60 is a schematic cross-sectional structural diagram of an exceptional rotor synchronous reluctance motor according to an embodiment of the present application;

FIG. 61 is a schematic cross-sectional structural diagram of an external rotor permanent magnet assisted synchronous reluctance motor according to an embodiment of the present application;

62 is a schematic cross-sectional structural diagram of an external rotor spoke-type embedded permanent magnet synchronous motor according to an embodiment of the present application;

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

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

FIG. 65 is a schematic cross-sectional structural diagram of an external rotor type I embedded permanent magnet synchronous motor according to an embodiment of the present application.

Detailed ways

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. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

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

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may 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 this application can be understood according to specific circumstances.

The terms "first" and "second" are only used for descriptive purposes, and should not 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 expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more.

Referring to FIGS. 9 to 12 , embodiments of the present application provide a rotor for a synchronous reluctance motor without an external magnetic bridge disposed 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 motor stator 14 and the rotor for a 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 non-magnetic conductive material skeleton 12 and a plurality of first iron core pieces 13 . The first non-magnetically conductive material skeleton 12 includes a first lower end cover 121 and a plurality of first skeleton sheet groups 122 disposed on the first lower end cover 121. The shapes of the plurality of first skeleton sheet groups 122 are the same as 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 conductive material core or a first rotor iron core, and both the first rotor iron core and the first iron core block 13 are silicon steel sheets. The inside of the non-magnetic-conductive material core of the first rotor is a non-magnetic-conductive material. The first non-magnetic conductive material skeleton 12 is made of non-magnetic conductive material, and the non-magnetic conductive material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the first skeleton sheet group 122 made of non-magnetic conductive 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 leakage.

Specifically, referring to FIGS. 10 to 12 , in some embodiments, since the rotor is in the shape of a cylinder, the first lower end cover 121 is in the shape of a disk, and the plurality of first skeleton sheet groups 122 are evenly distributed in the circumferential direction. on the lower end cap 121 . The first skeleton sheet group 122 includes a first skeleton piece 124 and a plurality of second skeleton pieces 123 arranged in the radial direction, and the first skeleton piece 124 is arranged close to the outer edge of the first lower end cover 121 . The opening size of the second frame pieces 123 increases sequentially from inside to outside, and there is a first gap between two adjacent second frame pieces 123 or between the first frame pieces 124 and the second frame pieces 123 located on the outside. The first rotor core 11 and the first iron core piece 13 are both connected to the first lower end cover 121, and the first rotor core 11 is located in the center of the first lower end cover 121, and the first iron core piece 13 is located in the second within the gap. The first lower end cover 121 and the first skeleton sheet group 122 are separate parts, the first lower end cover 121 and the first skeleton sheet group 122 are both made of non-magnetic conductive material, and the first skeleton 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 grooves 125 for fixing the first iron core pieces 13 . The processing method of this embodiment is as follows:

Referring to FIGS. 11 to 13 , silicon steel sheets or other magnetically permeable materials are first made into the first iron core piece 13 by means of pin connection, welding, die casting or bonding. The first iron core piece 13 can be provided with pin holes. 131. The first rotor iron core body 11 and the first iron core piece 13 are the magnetic conductive structure of the motor rotor (internal magnetic bridge of the synchronous reluctance motor). Then, the first rotor iron core body 11 and the first iron core pieces 13 are placed together according to preset positions to form a motor rotor iron core. Specifically, the lower ends of the first iron core pieces 13 can be respectively inserted into the corresponding first iron core positioning grooves 125, and then the first lower end cover 121 can be assembled with the first rotor iron core body 11 and the first iron core. Resin, plastic, adhesive and other materials are poured into the space between the blocks 13. After these materials are cured, the first lower end cover 121 can be firmly attached 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 cap 121 and the plurality of first skeleton sheet groups 122 are integrated into one piece, and the first lower end cap 121 can be fabricated by machining, injection molding, 3D printing, casting or mold forming. Non-magnetic conductive material skeleton 12 . It should be noted that: the first non-magnetically conductive material skeleton 12 can be directly made into a whole, or a plurality of parts can be connected together by bonding. Then insert the first rotor core body 11 and the first core piece 13 into the skeleton groove, and use glue to reinforce the first non-magnetic conductive material skeleton 12 and the first rotor core body 11 and the first core. The block 13 is fixed in one piece.

In some embodiments, referring to FIGS. 17 to 19 , the first non-magnetically conductive 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 sheet 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 first fabricated by machining, injection molding, 3D printing or mold forming, and then the first skeleton piece group 122 is inserted In the first positioning groove 127, the first rotor core body 11 and the first core block 13 are embedded in the skeleton groove, and finally the first non-magnetic conductive material skeleton 12, the first rotor core body 11 and the The first iron core piece 13 is fixed as a whole.

In 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 FIGS. 20 and 21 , an embodiment of the present application further provides a rotor 20 for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge disposed in a permanent magnet assisted synchronous reluctance motor, and a permanent magnet assisted synchronous reluctance motor. The structure of the synchronous reluctance motor is similar to that of the synchronous reluctance motor, except that the rotor 20 for the permanent magnet assisted synchronous reluctance motor without an external magnetic bridge also includes a first permanent magnet 24. Therefore, the structure of the permanent magnet assisted synchronous reluctance motor will not be detailed here. described.

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-magnetically conductive material skeleton 22 , a plurality of second core pieces 23 and a plurality of first permanent magnets 24 . The second non-magnetic conductive material skeleton 22 includes a second lower end cover 221 and a plurality of second skeleton sheet groups 222 disposed on the second lower end cover 221 . The shape of the plurality of second skeleton sheet groups 222 is similar to the shape 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 conductive material skeleton 12 is made of non-magnetic conductive material, and the non-magnetic conductive material can be selected from aluminum, plastic, resin, carbon fiber, ceramics or copper. In the embodiment of the present application, the second skeleton sheet group 222 made of non-magnetic conductive 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 leakage.

Specifically, referring to FIGS. 20 to 23 , in some embodiments, since the rotor is in the shape of a cylinder, the second lower end cover 221 is in the shape of a disk, and the plurality of second skeleton sheet groups 222 are evenly distributed in the second on the lower end cover 221 . The second skeleton sheet group 222 includes a radially arranged third skeleton piece 223 and a plurality of fourth skeleton pieces 224 interrupted in the middle. The frame piece 224 includes a left half and a right half. The opening size of the fourth frame sheet 224 increases sequentially from the inside to the outside. Between two adjacent fourth frame sheets 224 or between the third frame sheet 223 and the fourth frame sheet 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 to the second lower end cover 221 , and the second rotor iron core 21 is located in 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 on the outside, and the first permanent magnet 24 is located in the fourth skeleton piece 224 between the left and right halves. The second lower end cover 221 and the second skeleton sheet set 222 are separate parts, both of which are made of non-magnetic conductive materials, and the second skeleton sheet set 222 is made of resin, plastic, adhesive, and the like. The second lower end cover 221 is provided with a plurality of second iron core positioning grooves 225 for fixing the second iron core pieces 23 and permanent magnet positioning grooves 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 conductive materials are first made into the second core block 23 by means of pin connection, welding, die casting or bonding. The second rotor iron core 21 and the second iron core block 23 are the magnetic permeability structure of the motor rotor (the inner magnetic bridge of the permanent magnet assisted synchronous reluctance motor). Then, the second rotor iron core 21 , each of the second iron core pieces 23 and the first permanent magnets 24 are placed together according to preset positions to form a motor rotor iron core. Specifically, the lower ends of the second iron core pieces 23 can be respectively inserted into the corresponding second iron core positioning slots 225, the lower ends of the first permanent magnets 24 can be inserted into the corresponding permanent magnet positioning slots 228 respectively, and then Materials such as resin, plastic, adhesive, etc. are poured into the gap between the second lower end cover 221 and the second rotor core 21 and the second core piece 23. After 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 FIGS. 24 to 26 , the second lower end cap 221 and the plurality of second skeleton sheet groups 222 are integrated into one piece, and the second non-contact sheet can be fabricated by machining, injection molding, 3D printing, casting or mold forming. Magnetic conductive material skeleton 22 . It should be noted that: the second non-magnetically conductive material skeleton 22 can be directly made into a whole, or a plurality of parts can be connected as a whole by means of bonding. Then insert the second rotor core 21 and the second core pieces 23 into the skeleton grooves, and use glue to reinforce the second non-magnetic conductive material skeleton 22 with the second rotor core 21 and the second core pieces 23 fixed as one.

In some embodiments, referring to FIG. 27 , the second non-magnetically conductive 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 both ends of the second skeleton sheet group 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 first fabricated by machining, injection molding, 3D printing or mold forming, and then the second skeleton piece group 222 is inserted In the second positioning groove, the second rotor iron core body and the second iron core pieces are embedded into the skeleton groove, and finally the second non-magnetic conductive material skeleton 22, the second rotor iron core body and the second non-magnetic conductive material skeleton 22 are reinforced by glue. The second iron core pieces are fixed as a whole.

In other embodiments, there is no positioning groove on the second upper end cover 226 , and the second skeleton sheet group 222 is tightly clamped between the first upper end cover 126 and the second lower end cover 221 .

Referring to FIGS. 28 to 30 , an embodiment of the present application further provides a rotor 30 for a spoke-type embedded permanent magnet synchronous motor without an external magnetic bridge, including a third non-magnetically conductive material skeleton 32 and a plurality of third iron cores Pieces 31 and a plurality of spoke-type permanent magnets 33 . The third non-magnetic conductive material skeleton 32 includes a third lower end cover 321 and a first annular skeleton 322 disposed on 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 evenly distributed along the circumferential direction The spoke-type permanent magnets 33 are connected between the first annular frame 322 and the corresponding fifth frame piece 323, and the third core piece 31 is located between two adjacent spoke-type permanent magnets 33. The third iron core block 31 is made of silicon steel. The third non-magnetic conductive material skeleton 32 is made of non-magnetic conductive material, and the non-magnetic conductive 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 conductive material are 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 leakage.

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

The third lower end cover 321 , the first annular frame 322 and the fifth frame piece 323 are all made of non-magnetic conductive materials, and the first annular frame 322 and the fifth frame sheet 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 pieces 33 and spoke-type permanent magnet fixing grooves 326 for fixing the spoke-type permanent magnets 33 . The processing method of this embodiment is as follows:

Referring to FIGS. 28 to 30 , first place the third iron core block 31 made of silicon steel or other magnetically conductive materials and the spoke-type permanent magnets 33 together according to a preset position to form a motor rotor iron core. Specifically, the lower ends of the third iron core block 31 and the spoke-type permanent magnets 33 can be respectively inserted into the corresponding third iron core positioning grooves 325 and the spoke-type permanent magnet fixing grooves 326, and then the third lower end cover 321 Resin, plastic, adhesive and other materials are poured into the gap between the third iron core piece 31 and the spoke-type permanent magnet 33. After these materials are cured, the third lower end cover 321 and the third iron core can be assembled together. The block 31 and the spoke-type permanent magnets 33 are firmly bonded together.

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

In some embodiments, referring to FIGS. 33 to 35 , the third non-magnetic conductive material skeleton 32 includes a first annular skeleton 322 and a fifth skeleton sheet 323 and third upper end caps 327 disposed at the upper and lower ends thereof. The third upper end cover 327 is provided with a first annular frame positioning groove 328 and a first frame sheet positioning groove 329. Both ends of the first annular frame positioning groove 328 are inserted into the first annular frame positioning groove 328, and the fifth frame sheet Both ends of the 323 are inserted into the positioning grooves 329 of the first frame piece. Therefore, during processing, the first annular skeleton 322 and the fifth skeleton sheet 323 are first fabricated by machining, injection molding, 3D printing or mold forming, and then the second skeleton sheet group 222 is inserted into the corresponding positioning groove, and then The third iron core piece 31 and the spoke-type permanent magnet 33 are embedded in the skeleton groove, and finally the third non-magnetic conductive material skeleton 32, the third iron core piece 31 and the spoke-type permanent magnet 33 are fixed as a whole by means of glue reinforcement.

36 to 38 , an embodiment of the present application further provides a rotor 40 for an embedded permanent magnet synchronous motor without an external magnetic bridge, comprising a fourth non-magnetically conductive material skeleton 42 and a plurality of fourth iron core pieces 41 and a plurality of "V"-shaped permanent magnets 43; the fourth non-magnetically conductive 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 magnets 43 are 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 conductive material skeleton 42 is made of non-magnetic conductive material, and the non-magnetic conductive 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 conductive 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 leakage.

Specifically, referring to FIGS. 35 to 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 frame pieces 422 are evenly distributed on the fourth lower end cover 421 in the circumferential direction. superior. The "V"-shaped permanent magnet 43 and the fourth iron core piece 41 are both connected to 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 core piece 41 is connected between two adjacent sixth skeleton pieces 422 and is located outside the “V”-shaped permanent magnet 43 .

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

35 to 38, first place the fourth iron core block 41 made of silicon steel or other magnetically conductive material and the "V"-shaped permanent magnet 43 together according to a preset position to form a motor rotor iron core. Specifically, the lower end of the fourth iron core piece 41 can be inserted into the fourth iron core positioning groove 423 , and then the fourth lower end cover 421 , the fourth iron core piece 41 and the “V”-shaped permanent magnet 43 can be inserted. Resin, plastic, adhesive and other materials are poured into the gap between the two parts. When these materials are cured, the fourth lower end cover 421 can be firmly bonded with the fourth iron core piece 41 and the "V"-shaped permanent magnet 43 together.

In some embodiments, referring to FIGS. 39 and 40 , the fourth lower end cap 421 and the sixth skeleton sheet 422 are one piece, and the fourth non-magnetic conductive material can be fabricated by machining, injection molding, 3D printing, casting or mold forming. Skeleton 42. Then the fourth iron core piece 41 and the "V"-shaped permanent magnet 43 are embedded in the skeleton groove, and the fourth non-magnetic conductive material skeleton 42 is reinforced with the fourth iron core piece 41 and the "V"-shaped permanent magnet by means of glue. The magnet 43 is fixed integrally.

In some embodiments, referring to FIGS. 41 to 43 , the fourth non-magnetic conductive material skeleton 42 includes a sixth skeleton sheet 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 frame piece positioning groove 425 , and both ends of the sixth frame piece 422 are inserted into the sixth frame piece positioning groove 425 . Therefore, during processing, the sixth skeleton piece 422 is first made 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 is assembled into pieces 41 and the "V"-shaped permanent magnet 43 are embedded in the skeleton groove, and finally the fourth non-magnetic conductive material skeleton 42, the fourth iron core piece 41 and the "V"-shaped permanent magnet 43 are fixed as a whole by means of glue reinforcement. 44 to 46 , an embodiment of the present application further provides a rotor 50 for an embedded permanent magnet synchronous motor without an external magnetic bridge, comprising a fifth non-magnetically conductive material skeleton 52 and a plurality of fifth iron core blocks 51 and a plurality of "U" shaped permanent magnets 53. The fifth non-magnetic conductive material frame 52 includes a fifth lower end cover 521 and a third outer frame piece 522 arranged on the fifth lower end cover 521; The ”-shaped permanent magnets 53 are connected between the 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 between the “U”-shaped permanent magnets 53 outside. The fifth iron core block 51 is made of silicon steel. The fifth non-magnetic conductive material skeleton 50 is made of non-magnetic conductive material, and the non-magnetic conductive material can be selected from aluminum, plastic, resin, carbon fiber, ceramic or copper. In the embodiment of the present application, the third outer frame piece 522 made of non-magnetic conductive 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 leakage.

Specifically, referring to FIGS. 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 frame pieces 522 are uniformly distributed on the fifth lower end cover in the circumferential direction. 521 on. The "U"-shaped permanent magnet 53 and the fifth iron core piece 51 are both connected to the fifth lower end cover 521, the "U"-shaped permanent magnet 53 is connected between the two adjacent third outer frame pieces 522, and the third The five-iron core block 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 cover 521 and the third outer frame piece 522 are both made of non-magnetic conductive materials, and the third outer frame sheet 522 is made of resin, plastic and adhesive, etc. 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:

44 to 46 , first place the fifth iron core block 51 made of silicon steel or other magnetically conductive material and the "U"-shaped permanent magnet 53 together according to a preset position to form the motor rotor iron core. Specifically, the lower end of the fifth iron core piece 51 can be inserted into the fourth iron core positioning groove 423, and then the fifth lower end cover 521, the fifth iron core piece 51 and the "U"-shaped permanent magnet 53 can be inserted Resin, plastic, adhesive and other materials are poured into the gap between the two parts. After these materials are cured, the fifth lower end cover 521 can be firmly bonded with the fifth iron core piece 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 exoskeleton sheet 522 are one piece, and the fifth non-magnetically conductive can be fabricated by machining, injection molding, 3D printing, casting or molding. Material skeleton 50 . Then the fifth iron core piece 51 and the "U"-shaped permanent magnet 53 are embedded in the skeleton groove, and the fifth non-magnetic conductive material skeleton 50 is reinforced with the fifth iron core piece 51 and the "U"-shaped permanent magnet by means of glue. The magnet 53 is fixed integrally.

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

52 to 54 , an embodiment of the present application further provides a rotor 60 for an embedded permanent magnet synchronous motor without an external magnetic bridge, including a sixth non-magnetically conductive material skeleton 62 and a plurality of sixth iron core blocks 61 and a plurality of "one" shaped permanent magnets 63. The sixth non-magnetic conductive material skeleton 62 includes a sixth lower end cover 621 and a fourth outer skeleton sheet 622 arranged on the sixth lower end cover 621; The ""-shaped permanent magnet 63 is connected between the two adjacent fourth outer frame pieces 622, and the sixth iron core piece 61 is connected between the two adjacent fourth outer frame 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 conductive material skeleton 62 is made of non-magnetic conductive material, and the non-magnetic conductive 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 conductive 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 leakage.

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

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

52 to 54, first place the sixth iron core block 61 made of silicon steel or other magnetically conductive material and the "one"-shaped permanent magnet 63 together according to a preset position to form the motor rotor iron core. Specifically, the lower end of the sixth iron core piece 61 can be inserted into the fourth iron core positioning groove 423, and then the sixth lower end cover 621, the sixth iron core piece 61 and the "one"-shaped permanent magnet 63 can be inserted Resin, plastic, adhesive and other materials are poured into the gap between the two parts, and when these materials are cured, the sixth lower end cover 621 can be firmly bonded with 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 cap 621 and the fourth outer frame sheet 622 are integrated into one piece, and the sixth non-magnetically conductive can be fabricated by machining, injection molding, 3D printing, casting or molding. Material skeleton 62 . Then the sixth iron core piece 61 and the "one"-shaped permanent magnet 63 are embedded in the skeleton groove, and the sixth non-magnetic conductive material skeleton 62 is reinforced with the sixth iron core piece 61 and the "one"-shaped permanent magnet by means of glue. The magnet 63 is fixed integrally.

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

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

Referring to FIG. 60 , an embodiment of the present application provides an external rotor synchronous reluctance motor without an internal 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 rotor of the synchronous reluctance motor without the inner magnetic bridge outer rotor. The rotor for an external rotor synchronous reluctance motor without an internal magnetic bridge includes a first non-magnetically conductive material skeleton 12 and a plurality of first iron core pieces 13 , and the first iron core 13 pieces are U-shaped and radially extend from the inside to the The outer openings increase sequentially. The non-magnetic conductive material skeleton 12 includes a first skeleton sheet group 112 , a first skeleton 128 arranged on the outer circle in the radial direction of the rotor, and a second skeleton 129 arranged on the inner circle in the rotor radial direction.

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

62 to 65, the example of the present application is also applied to the outer rotor embedded permanent magnet synchronous motor, which is divided into spoke type (FIG. 62), V-shape (Fig. 63), U-shape (Fig. 64), I-shape (Fig. 65), etc.

Referring to FIG. 62 , an embodiment of the present application provides a structure of an external rotor spoke-type permanent magnet synchronous motor without an internal magnetic bridge, and the rotor of the external rotor spoke-type permanent magnet synchronous motor without an internal magnetic bridge includes a third non-magnetically conductive material skeleton 32 , a plurality of third iron core pieces 31 and spoke-type permanent magnets 33 . The third non-magnetic conductive material skeleton 32 includes a first annular skeleton 322 and a fifth skeleton piece 323, the first annular 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-type permanent magnets 33 are embedded in The third iron core pieces 31 are embedded in the positioning grooves of the third non-magnetic conductive material skeleton 32 .

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

Referring to FIG. 64 , an embodiment of the present application provides a structure of a U-shaped permanent magnet synchronous motor with an outer rotor without an inner magnetic bridge. The rotor of the U-shaped permanent magnet synchronous motor with an outer rotor without an inner magnetic bridge includes a fifth non-magnetically conductive material skeleton 52 , a plurality of fifth iron core pieces 51 and a "U"-shaped permanent magnet 53 . The fifth non-magnetically conductive material skeleton 52 is arranged on the inner side of the rotor near 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. The "U"-shaped permanent magnet 53 is embedded in the rotor. Between the inner and outer iron core pieces of the fifth iron core piece 51 .

Referring to FIG. 65 , an embodiment of the present application provides a structure of a permanent magnet synchronous motor type 1 without an inner magnetic bridge outer rotor, and the rotor of the type 1 permanent magnet synchronous motor without an inner magnetic bridge outer rotor includes a sixth non-magnetically conductive material skeleton 62 , the sixth iron core piece 61 and the "one"-shaped permanent magnet 63 . The non-magnetic-conductive 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-conductive material skeleton 62 and on the sixth iron core piece 61 .

The above are only specific embodiments of the present application, but the protection 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 protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (18)

1. A rotor for a synchronous reluctance motor without an external magnetic bridge, characterized in that it comprises a first rotor core, a first non-magnetic-conductive material skeleton and a plurality of first iron core pieces; the first non-magnetic-conductive material The skeleton includes a first lower end cover and a plurality of first skeleton sheet groups arranged on the first lower end cover, and the plurality of first skeleton sheet groups are uniformly distributed on the first lower end cover along the circumferential direction; The first skeleton sheet group includes a first skeleton sheet and a plurality of second skeleton sheets arranged in the radial direction, and a first skeleton sheet is provided between two adjacent second skeleton sheets or between the first skeleton sheet and the second skeleton sheet. gap; Both the first iron core piece 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 iron core piece is located in the first lower end cover. within a gap. 2 . 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 sheet is close to the The outer edge of the first lower end cover is arranged, and the size of the opening of the second frame piece increases sequentially from the inside to the outside. 3 . The rotor for a synchronous reluctance motor without an external magnetic bridge according to claim 2 , further comprising a first upper end cover disposed on the top of the first skeleton sheet group, the first skeleton sheet group being covered by 3 . Clamped between the first upper end cap and the first lower end cap. 4 . The rotor for a synchronous reluctance motor without an external magnetic bridge according to claim 3 , wherein 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 rotor. 5 . in the first positioning groove of the upper end cover. 5 . 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 conductive material core or a first rotor iron core. 6 . 6. A rotor for a permanent magnet-assisted synchronous reluctance motor without an external magnetic bridge, characterized in that it comprises a second rotor core, a second non-magnetically conductive material skeleton, a plurality of second iron core pieces and a plurality of first permanent magnets. a magnet; the second non-magnetic conductive material skeleton includes a second lower end cover and a plurality of second skeleton sheet groups arranged on the second lower end cover; a plurality of the second skeleton sheet groups are evenly distributed on the Cover the second lower end; the second skeleton sheet group includes a radially arranged third skeleton piece and a plurality of fourth skeleton pieces that are interrupted in the middle, between two adjacent fourth skeleton pieces or a third skeleton piece There is a second gap between the fourth skeleton sheet; The second rotor core, the second iron core piece 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 is concentric with the motor shaft. The core piece is located in the second gap, and the first permanent magnet is located at the break of the fourth skeleton piece. 7 . The rotor for permanent magnet assisted synchronous reluctance motor without external magnetic bridge according to claim 6 , wherein the second rotor core is located in the center of the second lower end cover, and the second skeleton sheet is close to the center of the second lower end cover. 8 . The outer edge of the second lower end cover is arranged, and the size of the opening of the fourth frame piece increases sequentially from the inside to the outside. 8 . 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 skeleton sheet group, and the second skeleton A sheet pack is clamped between the second upper end cap and the second lower end cap. 9 . The rotor for a permanent magnet assisted synchronous reluctance motor without an external magnetic bridge according to claim 8 , wherein 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. 10 . The rotor for a permanent magnet assisted synchronous reluctance motor without an 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. 11 . 11. A rotor for a spoke-type embedded permanent magnet synchronous motor without an external magnetic bridge, characterized in that it comprises a third non-magnetically conductive material skeleton, a plurality of third iron core blocks and a plurality of spoke-type permanent magnets; The third non-magnetically conductive material skeleton includes a third lower end cover, a first annular skeleton disposed on the third lower end cover, and a plurality of fifth skeleton pieces evenly distributed along the circumferential direction of the third lower end cover; the The permanent magnets are connected between the first annular frame and the corresponding fifth frame piece, and the third iron core piece is located between two adjacent spoke-type permanent magnets. 12 . The rotor for an inline permanent magnet synchronous motor without external magnetic bridge and spoke type according to claim 11 , wherein the plurality of fifth skeleton pieces are all located outside the first annular skeleton. 13 . 13 . The rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge and spoke type according to claim 12 , further comprising a third upper end cover arranged on the top of the fifth skeleton sheet, and the first Both the annular frame and the fifth frame piece are clamped between the third upper end cap and the third lower end cap. 14 . The rotor for an embedded permanent magnet synchronous motor without external magnetic bridge and spoke type according to claim 13 , wherein the third upper end cover is provided with a first annular skeleton positioning groove and a fifth skeleton sheet positioning. 15 . The upper end of the first annular frame is inserted into the positioning groove of the first annular frame, and the upper end of the fifth frame piece is inserted into the positioning groove of the fifth frame. 15. A rotor for an embedded permanent magnet synchronous motor without an external magnetic bridge, characterized in that it comprises a fourth non-magnetically conductive material skeleton, a plurality of fourth iron core pieces and a plurality of second permanent magnets; The four non-magnetically conductive material skeletons include a fourth lower end cover and a sixth skeleton piece disposed on the fourth lower end cover; the sixth skeleton pieces are evenly distributed on the fourth lower end cover along the circumferential direction, and the second permanent The magnet is connected between two adjacent sixth skeleton pieces, and the fourth iron core piece is connected between the two adjacent sixth skeleton pieces and is located outside the second permanent magnet. 16. 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" permanent magnet. ” shaped permanent magnet. 17 . 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, the sixth skeleton piece is clamped between the fourth lower end cap and the fourth upper end cap. 18 . 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 sheet is inserted into the rotor. 19 . connected to the fourth positioning groove.

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