CN209994251U

CN209994251U - Double-stator axial flux switch flux linkage permanent magnet motor

Info

Publication number: CN209994251U
Application number: CN201921318758.4U
Authority: CN
Inventors: 饶靖; 马贤好; 王春彦; 王华军
Original assignee: Suzhou Baobang Electric Co Ltd
Current assignee: Suzhou Baobang Electric Co Ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-01-24
Anticipated expiration: 2029-08-14

Abstract

The utility model provides a double-stator axial flux switch flux linkage permanent magnet motor, which comprises a shell, a stator, a rotor and a rotating shaft, wherein the shell is formed by symmetrically arranging and assembling a first end cover and a second end cover; the two stators are arranged in the end cover plate annular groove, and each stator consists of a permanent magnet, a stator coil and a stator core; the rotor consists of a rotor bracket, a rotor cover plate and a rotor iron core; the rotating shaft is installed in the shaft hole of the shell through two bearings and is rigidly connected with the rotor into a whole through interference fit. The utility model discloses combine together axial magnetic flux permanent-magnet machine and switch magnetic linkage permanent-magnet machine's characteristics, make the permanent magnet only have the magnetic conduction part on the stator and the rotor, simplified the processing assembly technology of rotor, reduced the cooling degree of difficulty.

Description

Double-stator axial flux switch flux linkage permanent magnet motor

Technical Field

The utility model relates to a two stator axial flux switch magnetic linkage permanent-magnet machine.

Background

An axial flux permanent magnet motor is a device in which a magnetic field axially passes through an air gap to complete electromechanical energy conversion. On one hand, the permanent magnet motor has the characteristics of high power density and high efficiency, is more compact than a radial motor in structure, and is suitable for occasions with special requirements on the appearance, such as a wheel hub motor used for vehicles, due to the fact that the shape of the permanent magnet motor is flatter.

On the other hand, a switched flux permanent magnet motor is a motor that operates by switching the direction of flux linkage, which is an electrical cycle when the rotor rotates one rotor pole. The motor is characterized in that the permanent magnet is arranged on the stator, and the switching of the flux linkage direction is realized by utilizing the convexity of the stator and the rotor. The rotor is only provided with a magnetic conduction component, so that the rotor is simple in structure. One process difficulty with axial flux machines is the installation of rotor components. If the switch flux linkage permanent magnet motor is combined with the axial flux permanent magnet motor, the rotor process difficulty of the axial flux motor can be well simplified.

Disclosure of Invention

The utility model aims at overcoming the above-mentioned drawback among the prior art, simplifying axial flux permanent-magnet machine's the rotor technology degree of difficulty.

In order to achieve the above object, the utility model provides a 1, a two stator axial magnetic flux switch flux linkage permanent-magnet machine, including shell, stator, rotor and axis of rotation, its characterized in that:

the shell is a disc-shaped shell with an accommodating space inside, a shaft hole is formed in the center of the shell, a rotating shaft penetrates through the shaft hole and is rotatably connected with the shell, the stators and the rotors are accommodated in the accommodating space, the rotors and the rotating shaft are synchronously and rotatably connected, and the two stators are fixed on the shell and distributed on two sides of the rotors.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the side of the shell close to the stator is concave inwards to form a liquid cooling space, the inner sides of the liquid cooling spaces are respectively sealed by an end cover plate, and the end cover plates are in heat transfer connection with the stator.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the inner side surface of the end cover plate is provided with an annular groove, and the stator is embedded in the annular groove.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the liquid cooling space is annular, water bars are arranged in the liquid cooling space to prolong the flow path, one water bar cuts off the flow path along the radial direction, a water inlet is arranged at one side of the cutting position, and a water outlet is arranged at the other side of the cutting position.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the water retaining strips are arranged in a radial mode, one of the water retaining strips is arranged close to the radial outer side, the other water retaining strip is arranged close to the radial inner side, and the flow path is distributed in a zigzag mode.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the water bar is spirally arranged.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the stator comprises permanent magnet, stator coil and stator core, stator core is the ring body that has the radial recess of several, and permanent magnet and stator coil inlay in the recess, every permanent magnet is a set rather than the stator core of both sides, and every outside of a set of is twined and is equipped with stator coil.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the groove depth for embedding the permanent magnet is deeper than the groove for embedding the stator coil 11.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the rotor includes rotor support, rotor apron and rotor core, rotor support with 4 tight fits of axis of rotation are connected, and rotor core block is in rotor support with form fixedly between the rotor apron, and can with rotor support rotates together.

The double-stator axial flux switch flux linkage permanent magnet motor is characterized in that: the rotor iron core is formed by curling silicon steel sheets from inside to outside, is annular in shape, is provided with radial bulges at two sides, and the number of the radial bulges at each side is the number of pole pairs of the motor;

the inner-layer circular ring of the rotor support is in close fit connection with the rotating shaft, the rotor support is also provided with an outer-layer circular ring and a fan-shaped rib plate fixed on the radial inner side of the outer-layer circular ring, the rotor core is assembled on the rotor support in a transition fit manner, and a radial bulge on one side of the rotor core is positioned in a gap formed by the fan-shaped rib plate of the rotor support; the rotor support and the rotor iron core are matched through a key and a key groove so as to circumferentially position the rotor iron core;

the rotor cover plate is provided with an outer ring and a plurality of fan-shaped fin plates fixed on the radial inner side of the outer ring, the outer ring of the rotor cover plate is buckled on an outer-layer ring of the rotor support through interference fit, the fan-shaped fin plates are abutted against one side, opposite to the rotor support, of the rotor core, and radial protrusions on the other side of the rotor core are located in gaps formed by the fan-shaped fin plates of the rotor cover plate, so that the rotor support, the rotor core and the rotor cover plate are fixed together.

The utility model has the advantages that:

1. the permanent magnet is arranged on the stator, and the rotor is only provided with a magnetic conduction part, so that the manufacturing and assembling processes of the rotor are simplified;

2. the main heating parts are arranged on the stator, and the stator and the rotating shaft of the motor can be simultaneously cooled by arranging water cooling on the first end cover and the second end cover, so that the water cooling arrangement process is simplified;

3. the rotor iron core is fixed by the rotor support interference assembly structure, so that the number of components is small, and the reliability is high;

4. the rotor iron core is formed by coiling silicon steel sheets, and the loss is low.

Drawings

Fig. 1 is a structural diagram of a double-stator axial flux switching flux permanent magnet motor provided by the present invention;

FIGS. 2a, 2b, 2c are a left side view, a cross-sectional view and a right side view, respectively, of the first end cap;

FIGS. 3a and 3b are a right side view and a cross-sectional view of the end cover plate, respectively;

FIGS. 4a and 4b are a right side view and a cross-sectional view of the stator, respectively;

fig. 5 is a perspective view of a stator core;

FIGS. 6a and 6b are a right side view and a cross-sectional view of the rotor, respectively;

FIG. 7 is a perspective view of a rotor core;

FIGS. 8a and 8b are a right side view and a cross-sectional view of the rotor holder, respectively;

FIGS. 9a, 9b, and 9c are perspective, right side, and cross-sectional views, respectively, of a rotor cover plate;

FIG. 10 is a right side view of an alternative first endcap;

FIG. 11 is a left side view of an alternative first endcap;

fig. 12 is a right side view of another alternative spider.

Description of reference numerals: 1-a first end cap; 101-a through hole; 102-a liquid-cooled space; 2-a second end cap; 201-a threaded hole; 202-a liquid-cooled space; 3-end cover plate; 4-a rotating shaft; 5-a bearing; 6-a stator; 7-a rotor; 8-water retaining strip; 9-an annular groove; 10-a permanent magnet; 11-a stator coil; 12-a stator core; a connecting portion 121; 13-a rotor support; 131-inner ring; 132-middle ring; 133-outer ring; 134-sector rib plates; a 135-bond; 14-rotor cover plate; 141-an outer ring; 142-fan-shaped fin plate; 15-rotor core; 151-radial projection; 152-a keyway; 16-a water inlet; and 17-water outlet.

Detailed Description

Some specific embodiments of the invention will be described in detail below, by way of example and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.

Referring to fig. 1, in this embodiment, the present invention provides a double-stator axial flux switching flux linkage permanent magnet motor, which includes a housing, a stator 6, a rotor 7 and a rotating shaft 4, wherein:

the shell is the discoid thin wall casing that has the accommodation space in, is formed by the equipment of first end cover 1 and the 2 symmetrical arrangement of second end cover, and open at the shell center has a shaft hole that runs through first end cover 1 and second end cover 2, and the both ends of axis of rotation 4 respectively form rotatable coupling through a bearing 5 with first end cover 1 and second end cover 2, hold stator 6 and rotor 7 in the accommodation space, rotor 7 through the tight fit with the middle section fixed connection of axis of rotation 4.

As shown in fig. 1 and fig. 2a to fig. 2c, ten through holes 101 are uniformly arranged in the circumferential direction of the first end cover 1; ten threaded holes 201 are formed in the second end cap 2 at opposite positions, so that the first end cap 1 and the second end cap 2 can be assembled into a whole through bolt connection. In order to save space, the first end cap 1 is provided with a recess at the through hole 101 to form a counter bore.

Moreover, the inner sides of the first end cover 1 and the second end cover 2 are both recessed inwards to form annular liquid cooling spaces 102 and 202, the inner sides of the liquid cooling spaces 102 and 202 are respectively sealed by an end cover plate 3 (preferably welded connection), in order to prolong the flowing distance of heat exchange liquid in the liquid cooling spaces 102 and 202, a plurality of water bars 8 are arranged on the wall surfaces of the liquid cooling spaces 102 and 202, in the embodiment, the plurality of water bars 8 are arranged on the annular inner surface of the first end cover 1, the plurality of water bars 8 are arranged in a radial shape, in two adjacent water bars 8, one water bar 8 is arranged close to the radial outer side, and the other water bar is arranged close to the radial inner side, so that flow paths in the liquid cooling spaces 102 and 202 are distributed in a zigzag shape; the radial two ends of one of the water bars 8 are completely sealed between the top wall and the wall of the shaft hole to cut off the annular flow path, one side of the cut-off position is provided with a water inlet 16, and the other side is provided with a water outlet 17, so that the heat exchange liquid can flow more effectively. Cooling of the first end cap 1, the second end cap 2, the bearing 5 and the stator 6 may be accomplished by the heat exchange liquid flowing through the entire flow path.

The second end cap 2 is substantially the same as the first end cap 1, except that at the junction of the two, ten through holes 101 are provided in the first end face, and ten threaded holes 201 are provided in the opposite position.

Referring to fig. 3a and 3b, which are schematic structural diagrams of the end cover plate 3, an annular groove 9 is formed on the inner side (non-closed side) surface of the end cover plate 3 for installing the stator 6. The two stators 6 are respectively arranged in annular grooves 9 on the end cover plates 3 of the first end cover 1 and the second end cover 2.

Referring to fig. 4a, 4b and 5, the stator 6 is composed of permanent magnets 10, stator coils 11 and stator cores 12, each permanent magnet 10 and the stator cores 12 on both sides thereof form a group, and the stator coil 11 is wound on the outer side of each group; as shown in fig. 5, the stator core 12 is a ring-shaped body having a plurality of radial grooves, and the permanent magnets 10 and the stator coils 11 are embedded in the grooves. The depth of the groove for embedding the permanent magnet 10 is deep, the thickness of the connecting part 121 of the stator core 12 is only 2-3mm, and the groove for embedding the stator coil 11 is shallow, so that a certain thickness of the yoke part is ensured for providing a passing path of a magnetic field. The shape of the groove on the stator iron core 12 is trapezoidal, the side length close to the axis position is shorter, the side length far away from the axis position is longer, and the shape of the permanent magnet 10 is matched with the shape of the groove.

Referring to fig. 6a and 6b, the rotor 7 includes a rotor bracket 13, a rotor cover plate 14 and a rotor core 15, the rotor bracket 13 is tightly fitted and connected with the rotating shaft 4, and the rotor core 15 is clamped between the rotor bracket 13 and the rotor cover plate 14 to form a fixing structure and can rotate together with the rotor bracket 13.

Referring to fig. 7, the rotor core 15 is formed by winding silicon steel sheets from inside to outside, and is annular, and has radial protrusions 151 on both sides, and the number of the radial protrusions 151 on each side is the number of pole pairs of the motor. Meanwhile, a key groove 152 is formed in the inner circle of the rotor core 15.

Referring to fig. 8a and 8b, in this example, the rotor support 13 has three layers of rings, wherein the inner layer ring 131 is tightly fitted and connected with the rotating shaft 4, and the rotating shaft 4 further has a stepped shoulder for axially positioning the inner layer ring 131. Radial cuboid vertical ribs are arranged between the inner-layer circular ring 131 and the middle-layer circular ring 132, fan-shaped rib plates 134 are arranged between the middle-layer circular ring 132 and the outer-layer circular ring 133, and when the rotor core 15 is assembled on the rotor support 13 in a transition fit mode, the radial protrusions 151 on one side of the rotor core 15 are located in gaps formed by the fan-shaped rib plates 134 of the rotor support 13. The middle ring 132 of the rotor bracket 13 further has a protruding key 135, which can cooperate with a key groove 152 on the inner circle of the rotor core 15 to circumferentially position the rotor core 15.

Referring to fig. 9, the rotor cover plate 14 has an outer ring 141 and a plurality of fan-shaped fins 142 fixed to a radial inner side of the outer ring 141, the outer ring 141 of the rotor cover plate 14 is fastened to the outer ring 133 of the rotor bracket 13 by interference fit, the fan-shaped fins 142 abut against a side of the rotor core 15 opposite to the rotor bracket 13, and a radial protrusion 151 on the other side of the rotor core 15 is located in a gap formed by the fan-shaped fins 142 of the rotor cover plate 14, so that the rotor bracket 13, the rotor core 15, and the rotor cover plate 14 are fixed together.

On the basis of the above embodiments, the present invention has some alternatives, such as:

referring to fig. 10, the water bars 8 on the inner surfaces of the first end cap 1 and the second end cap 2 are spirally arranged, and the spirally arranged water bars 8 make the water channel between the water inlet 16 and the water outlet 17 in a labyrinth shape, so that the contact area between the cooling water and the end caps is further increased.

Referring to fig. 11, the bolt connection between the first end cap 1 and the second end cap 2 is designed to have a flange, which is more beneficial to reduce the weight of the end cap.

Referring to fig. 12, the rotor frame 13 eliminates the rectangular parallelepiped radial vertical ribs between the inner ring 131 and the middle ring 132, and connects the inner ring 131 and the middle ring 132 together to improve the structural strength.

Finally, can understand the utility model has the advantages that, through combining together axial magnetic flux permanent-magnet machine and switch magnetic linkage permanent-magnet machine's characteristics, make the permanent magnet on the stator, and only have the magnetic conduction part on the rotor, not only simplified the processing assembly process of rotor, still reduced the cooling degree of difficulty simultaneously. And because rotor core is curled by the silicon steel sheet and forms, its loss is low, and the rotor part is few, and the assembly is simple, has also improved its reliability.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a two stator axial magnetic flux switch flux linkage permanent-magnet machine, includes shell, stator, rotor and axis of rotation, its characterized in that:

2. A dual stator axial flux switching flux linkage permanent magnet machine according to claim 1, wherein: the side of the shell close to the stator is concave inwards to form a liquid cooling space, the inner sides of the liquid cooling spaces are respectively sealed by an end cover plate, and the end cover plates are in heat transfer connection with the stator.

3. A dual stator axial flux switching flux linkage permanent magnet machine according to claim 2, wherein: the inner side surface of the end cover plate is provided with an annular groove, and the stator is embedded in the annular groove.

4. A dual stator axial flux switching flux linkage permanent magnet machine according to claim 2, wherein: the liquid cooling space is annular, water bars are arranged in the liquid cooling space to prolong the flow path, one water bar cuts off the flow path along the radial direction, a water inlet is arranged at one side of the cutting position, and a water outlet is arranged at the other side of the cutting position.

5. The dual stator axial flux switching flux linkage permanent magnet electric machine of claim 4, wherein: the water retaining strips are arranged in a radial mode, one of the water retaining strips is arranged close to the radial outer side, the other water retaining strip is arranged close to the radial inner side, and the flow path is distributed in a zigzag mode.

6. The dual stator axial flux switching flux linkage permanent magnet electric machine of claim 4, wherein: the water bar is spirally arranged.

7. A dual stator axial flux switching flux linkage permanent magnet machine according to claim 1, wherein: the stator comprises permanent magnet, stator coil and stator core, stator core is the ring body that has the radial recess of several, and permanent magnet and stator coil inlay in the recess, every permanent magnet is a set of rather than the stator core of both sides, and every outside of organizing is around being equipped with stator coil.

8. The dual stator axial flux switching flux linkage permanent magnet electric machine of claim 7, wherein: the depth of the groove for embedding the permanent magnet is deeper than that of the groove for embedding the stator coil.

9. A dual stator axial flux switching flux linkage permanent magnet machine according to claim 1, wherein: the rotor comprises a rotor support, a rotor cover plate and a rotor core, the rotor support is connected with the rotating shaft in a tight fit mode, and the rotor core is clamped between the rotor support and the rotor cover plate to be fixed and can rotate together with the rotor support.

10. A dual stator axial flux switching flux linkage permanent magnet electric machine according to claim 9, wherein: the rotor iron core is formed by curling silicon steel sheets from inside to outside, is annular in shape, is provided with radial bulges at two sides, and the number of the radial bulges at each side is the number of pole pairs of the motor;