CN212518574U

CN212518574U - Double-stator motor

Info

Publication number: CN212518574U
Application number: CN202021581539.8U
Authority: CN
Inventors: 章素民; 张丽颖; 刘宝文
Original assignee: Shenzhen Chengtai Power Technology Co ltd
Current assignee: Shenzhen Chengtai Power Technology Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-02-09
Anticipated expiration: 2030-08-03

Abstract

The utility model discloses a two stator motors relates to motor technical field. The double-stator motor comprises an inner stator, an outer stator, a rotor and an output shaft, wherein the outer stator is coaxially arranged outside the inner stator, the rotor comprises a plurality of magnetic steels and two fixing rings, the plurality of magnetic steels are positioned between the inner stator and the outer stator and form a circle of magnetic steel ring, the magnetic steel ring can rotate relative to the inner stator and the outer stator, and each magnetic steel extends along the axial direction of the inner stator; the two fixing rings are respectively coaxially connected to two ends of the magnetic steel ring along the axial direction of the magnetic steel ring and are used for fixing a plurality of magnetic steels; two solid fixed rings all pass through connecting piece and output shaft, and the rotor can drive the output shaft and rotate. Compared with the prior art in which the rotor is independently arranged and the magnetic steel is uniformly fixed on the inner wall and the outer wall of the rotor, only one layer of magnetic steel is arranged between the inner stator and the outer stator, so that the problem that the two layers of magnetic steel have angle deviation in the pasting process can be avoided, and the performance of quick response of the motor is improved.

Description

Double-stator motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a double stator motor.

Background

With the development of motor technology and permanent magnet materials, permanent magnet motors are widely applied with the advantages of high efficiency, high power density, high power factor and the like. At present, most of traditional permanent magnet motors (surface-mounted rotors or built-in rotors) are of single-stator structures, air gap magnetic fields are not easy to adjust, and sometimes the requirements of low-speed large-torque and high-speed operation capacity are difficult to meet at the same time. Therefore, a double-stator motor appears, and the double-stator permanent magnet motor is different from the traditional single-stator motor, has an inner stator and an outer stator, has an inner air gap and an outer air gap between the inner stator and the rotor, and has the characteristics of high power density, strong overload capacity, high material utilization rate and the like.

At present, the most common double-stator motor has a concentric structure, the double-stator motor with the concentric structure is most commonly applied to a cup-shaped rotor structure motor, a rotor of the motor consists of a whole rotor cup, magnetic steel is fixed on the inner wall and the outer wall of the rotor, and the magnetic steel of the inner wall and the outer wall has the problem of deviation in the pasting process, so that the use performance of the whole motor is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two stator motors can only be provided with the one deck magnet steel between inner stator and outer stator, can avoid two-layer magnet steel to have the problem of angular deviation at pasting the in-process.

To achieve the purpose, the utility model adopts the following technical proposal:

a dual stator electric machine comprising:

the outer stator is coaxially arranged outside the inner stator;

the rotor comprises a plurality of magnetic steels and two fixing rings, the plurality of magnetic steels are positioned between the inner stator and the outer stator and form a circle of magnetic steel ring, the magnetic steel ring can rotate relative to the inner stator and the outer stator, and each magnetic steel extends along the axial direction of the inner stator; the two fixing rings are respectively coaxially connected to two ends of the magnetic steel ring along the axial direction of the magnetic steel ring and are used for fixing the plurality of magnetic steels;

and the output shaft, two the solid fixed ring all through the connecting piece with output shaft connection, the rotor can drive the output shaft rotates.

Optionally, the magnetic steels are uniformly arranged at intervals along the circumferential direction of the magnetic steel ring.

Optionally, the fixing ring faces one side of the magnetic steel and is provided with a groove, and each magnetic steel is partially located in the groove.

Optionally, two side faces of the magnetic steel in the radial direction of the inner stator are respectively abutted to two side walls of the groove, and the end face of the magnetic steel in the axial direction of the inner stator is abutted to the bottom face of the groove.

Optionally, a plurality of protrusions are arranged in the groove, the protrusions are arranged along the circumferential direction of the fixing ring at even intervals, and one magnetic steel is arranged between every two adjacent protrusions.

Optionally, two side surfaces of the magnetic steel along the circumferential direction of the inner stator are respectively abutted to the two protrusions.

Optionally, pouring sealant is poured into the groove and a gap between two adjacent magnetic steels.

Optionally, a threaded hole is formed in the fixing ring, and the fixing ring is connected with the connecting piece through the threaded hole.

Optionally, the inner stator is embedded with a plurality of inner stator windings uniformly arranged at intervals along the circumferential direction of the inner stator.

Optionally, the outer stator is embedded with a plurality of outer stator windings uniformly arranged at intervals along the circumferential direction of the outer stator.

The utility model has the advantages that: the utility model provides a double-stator motor, including inner stator and outer stator, and be provided with the rotor between inner stator and outer stator, the rotor includes the magnet steel ring that a plurality of magnet steels formed, and at the both ends of the axial direction of magnet steel ring, fix a plurality of magnet steels through two retaining rings, compare with equal fixed magnet steel among the prior art on rotor inner wall and outer wall, only be provided with the one deck magnet steel between inner stator and the outer stator, can avoid two-layer magnet steel to have the problem of angular deviation at pasting the in-process, and then can improve the performance of motor.

Drawings

Fig. 1 is a schematic structural diagram of a double-stator motor according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a double stator motor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fixing ring of a double-stator motor according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the magnetic steel and the fixing ring of the dual-stator motor provided by the embodiment of the present invention.

In the figure:

1-an inner stator; 11-an inner stator winding;

2-an outer stator; 21-an outer stator winding;

3-magnetic steel;

4-fixing the ring; 41-groove; 42-convex.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention will be further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 and 2, the double-stator motor includes an inner stator 1, an outer stator 2, a rotor and an output shaft, wherein the outer stator 2 is coaxially disposed outside the inner stator 1, the rotor includes a plurality of magnetic steels 3 and two fixing rings 4, the plurality of magnetic steels 3 are all located between the inner stator 1 and the outer stator 2 and form a circle of magnetic steel ring, the magnetic steel ring can rotate relative to the inner stator 1 and the outer stator 2, and each magnetic steel 3 extends along the axial direction of the inner stator 1; the two fixing rings 4 are respectively coaxially connected to two ends of the magnetic steel ring along the axial direction of the magnetic steel ring and used for fixing the plurality of magnetic steels 3; two solid fixed rings 4 all pass through connecting piece and output shaft, and the rotor can drive the output shaft and rotate. It can be understood that, be provided with the rotor between interior stator 1 and outer stator 2, the rotor includes the magnet steel ring that a plurality of magnet steel 3 formed, and at the both ends of the axial direction of magnet steel ring, fix a plurality of magnet steel 3 through two solid fixed ring 4, compare with prior art in setting up the rotor alone and all fixing magnet steel 3 on rotor inner wall and outer wall, only be provided with one deck magnet steel 3 between interior stator 1 and the outer stator 2, can reduce the inertia of rotor, and can avoid two-layer magnet steel 3 to have the problem of angular deviation at pasting the in-process, the performance of motor quick response has been improved, and then can improve the performance of motor.

Optionally, the inner stator 1 is embedded with a plurality of inner stator windings 11 uniformly spaced along the circumference of the inner stator 1. The outer stator 2 is embedded with a plurality of outer stator windings 21 which are uniformly distributed along the circumferential direction of the outer stator 2 at intervals. It will be appreciated that when the double stator machine is in use, the inner stator winding 11 and the outer stator winding 21 are both connected to a three phase ac supply to energise the inner stator winding 11 and the outer stator winding 21. The number of the inner stator windings 11 and the outer stator windings 21 may be set according to actual requirements, and is not limited herein.

Alternatively, as shown in fig. 4, the plurality of magnetic steels 3 are arranged at regular intervals in the circumferential direction of the magnetic steel ring. It can be understood that a plurality of magnet steels 3 are arranged at uniform intervals, so that the magnetic field distribution is uniform, and the use performance of the double-stator motor is improved. As for the quantity and the interval of magnet steel 3, can carry out the adaptability adjustment according to the difference of this double stator motor's user demand.

Specifically, a threaded hole is formed in the fixing ring 4, and the fixing ring 4 is connected with the connecting piece through the threaded hole. It can be understood that, because the magnetic steel ring formed by the fixed ring 4 and the magnetic steel 3 can be equivalent to the rotor, when the inner stator winding 11 and the outer stator winding 21 are electrified, the magnetic steel ring can rotate relative to the inner stator 1 and the outer stator 2, and then the output shaft connected with the fixed ring 4 can be driven to rotate, and the output shaft is the final output end of the double-stator motor.

Optionally, as shown in fig. 3, a groove 41 is provided on a side of the fixing ring 4 facing the magnetic steel 3, and each magnetic steel 3 is partially located in the groove 41. Specifically, two side faces of the magnetic steel 3 in the radial direction of the inner stator 1 are respectively abutted to two side walls of the groove 41, and the end face of the magnetic steel 3 in the axial direction of the inner stator 1 is abutted to the bottom face of the groove 41. It can be understood that, solid fixed ring 4 fixes magnet steel 3 through recess 41, through two lateral walls and a bottom surface that make recess 41 respectively with magnet steel 3's three face butt to guarantee magnet steel 3 stability in recess 41, further guarantee solid fixed ring 4 to magnet steel 3's fixed effect. In this embodiment, because the magnet steel ring is equivalent to the effect of rotor, consequently the solid fixed ring 4 of final magnet steel 3 and both sides can rotate for inner stator 1 and outer stator 2, for guaranteeing the rotation effect, two solid fixed ring 4 fix a plurality of magnet steel 3 after, gu fixed ring 4 all can and inner stator 1 and outer stator 2 between keep certain clearance on the radial direction of inner stator 1, in order to guarantee the rotation effect.

Optionally, a plurality of protrusions 42 are disposed in the groove 41, the plurality of protrusions 42 are disposed at even intervals along the circumferential direction of the fixing ring 4, and one magnetic steel 3 is disposed between each two adjacent protrusions 42. Specifically, two side faces of the magnetic steel 3 in the circumferential direction of the inner stator 1 abut against the two protrusions 42, respectively. It can be understood that the positions of the magnetic steels 3 can be fixed through the protrusions 42, so that the equal intervals between two adjacent magnetic steels 3 are ensured, and the magnetic steels 3 are favorably mounted. As for the quantity of the bulges 42, the quantity can be determined according to the quantity of the required magnetic steels 3, the distance between two adjacent bulges 42 can be adjusted according to the size of the magnetic steels 3, and meanwhile, the size of the bulges 42 can be adaptively adjusted to meet the requirements of different distances between two adjacent magnetic steels 3.

Optionally, pouring sealant is poured in the groove 41 and at the gap between two adjacent magnetic steels 3. In this embodiment, after a plurality of magnet steels 3 and the installation of the solid fixed ring 4 of both sides are accomplished, through the gap between two magnet steels 3 pouring casting glue in to recess 41, not only can further fixed magnet steel 3 to avoid magnet steel 3 the condition that drops to appear rotating the in-process, and the casting glue is favorable to magnet steel 3 to dispel the heat, and then can reduce magnet steel 3's temperature, improves magnet steel 3's life. In other embodiments, other liquid adhesives may be used instead of or in addition to the potting adhesive.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A dual stator electric machine comprising:

the stator comprises an inner stator (1) and an outer stator (2), wherein the outer stator (2) is coaxially arranged on the outer side of the inner stator (1);

the rotor comprises a plurality of magnetic steels (3) and two fixing rings (4), the plurality of magnetic steels (3) are positioned between the inner stator (1) and the outer stator (2) and form a circle of magnetic steel ring, the magnetic steel ring can rotate relative to the inner stator (1) and the outer stator (2), and each magnetic steel (3) extends along the axial direction of the inner stator (1); the two fixing rings (4) are respectively coaxially connected to two ends of the magnetic steel ring along the axial direction of the magnetic steel ring and used for fixing the plurality of magnetic steels (3);

and the output shafts are connected with the fixed rings (4) through connecting pieces, and the rotors can drive the output shafts to rotate.

2. A double stator electric machine according to claim 1, characterized in that a plurality of said magnetic steels (3) are arranged at regular intervals in the circumferential direction of said magnetic steel ring.

3. A double stator electric machine according to claim 2, characterized in that the side of the fixing ring (4) facing the magnetic steel (3) is provided with a groove (41), each magnetic steel (3) being partially inserted in the groove (41).

4. A double stator motor according to claim 3, wherein two side surfaces of the magnetic steel (3) in the radial direction of the inner stator (1) are respectively abutted against two side walls of the groove (41), and an end surface of the magnetic steel (3) in the axial direction of the inner stator (1) is abutted against a bottom surface of the groove (41).

5. A double-stator motor according to claim 3, wherein a plurality of protrusions (42) are arranged in the groove (41), the plurality of protrusions (42) are uniformly spaced along the circumferential direction of the fixing ring (4), and one magnetic steel (3) is inserted between every two adjacent protrusions (42).

6. A double stator electric machine according to claim 5, characterized in that the two sides of the magnetic steel (3) in the circumferential direction of the inner stator (1) abut against the two protrusions (42), respectively.

7. A double-stator motor according to claim 3, wherein a pouring sealant is poured in the groove (41) and at the gap between two adjacent magnetic steels (3).

8. A double stator motor according to any one of claims 1-7, wherein the fixing ring (4) is provided with a threaded hole, through which the fixing ring (4) is connected with the connecting piece.

9. A double stator electric machine according to any of claims 1-7, characterized in that the inner stator (1) has embedded therein a plurality of inner stator windings (11) arranged evenly spaced along the circumference of the inner stator (1).

10. A double stator machine according to any of claims 1-7, characterized in that the outer stator (2) is embedded with a plurality of outer stator windings (21) evenly spaced in the circumferential direction of the outer stator (2).