CN216290417U

CN216290417U - Switched reluctance motor

Info

Publication number: CN216290417U
Application number: CN202121073153.0U
Authority: CN
Inventors: 颜士伟; 池晓峰; 刘学; 张俊杰; 郑江松
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-04-12
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses a switched reluctance motor which comprises a front end cover, a rear end cover, a stator assembly and a screw, wherein a front positioning protrusion is arranged on the end surface of one side of an opening of the front end cover, and a threaded hole is formed in the center of the front positioning protrusion; a plurality of rear positioning protrusions are uniformly arranged on the end face of one side of the opening of the rear end cover in the axial direction, and through screw mounting holes are formed in the centers of the rear positioning protrusions; the stator assembly comprises a stator core, a yoke part of the stator core is provided with a convex part mounting hole for inserting a front positioning convex part and a rear positioning convex part, and the convex part mounting hole axially penetrates through the stator core; the rear end cover, the stator core and the front end cover are fixedly connected through the screws. The utility model provides a switched reluctance motor, which can ensure the coaxiality of a front end cover, a rear end cover and a stator core without additionally processing a spigot structure, and does not need a motor shell to protect internal parts.

Description

Switched reluctance motor

Technical Field

The utility model relates to a switched reluctance motor, and belongs to the technical field of motors.

Background

At present, most manufacturers of electric tools and garden tools use series excited motors to drive mechanical structures to rotate. As is well known, the series excited motor uses a carbon brush and a commutator, so that the life is short, the failure rate is high, and carbon brush dust pollutes the environment. And the defects that the permanent magnet direct current brushless motor is adopted by manufacturers but the price of the permanent magnet material is high and the demagnetization is easy exist. Therefore, the use of the switched reluctance motor is a good choice, and the above problems can be overcome.

However, the existing switched reluctance motor has a complex assembly structure, a motor shell is usually required to be manufactured separately, a stator core is installed in the motor shell, a motor end cover is installed on the motor shell, the motor end cover and the stator core need a spigot structure to ensure the coaxiality of the end cover and the core, and the complexity of punching and stacking the core is increased.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art, and provides a switched reluctance motor which can ensure the coaxiality of a front end cover, a rear end cover and a stator core without additionally processing a spigot structure and does not need a motor shell to protect internal parts.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a switched reluctance machine comprising:

the front end cover is provided with a front positioning protrusion on one side end face of an opening of the front end cover, and a threaded hole is formed in the center of the front positioning protrusion;

the rear positioning device comprises a rear end cover, a plurality of rear positioning bulges are uniformly arranged on the end surface of one side of an opening of the rear end cover in the axial direction, and a through screw mounting hole is formed in the center of each rear positioning bulge;

the stator assembly comprises a stator core, a yoke part of the stator core is provided with a convex part mounting hole for inserting a front positioning convex part and a rear positioning convex part, and the convex part mounting hole axially penetrates through the stator core;

and the screws sequentially penetrate through the screw mounting holes of the rear positioning protrusions and the convex mounting holes of the stator core and are screwed into the threaded holes of the front positioning protrusions, and the rear end cover, the stator core and the front end cover are fixedly connected.

Further, the boss mounting hole is located outside in the radial direction of the stator salient pole.

Further, the inner periphery of the stator core is provided with a plurality of stator salient poles.

Further, stator module includes coil skeleton, be provided with a plurality of formers in the coil skeleton, the former parcel is on the stator salient, the winding has the winding on the former.

Further, the radial outer edge of the axial one end of the coil skeleton is provided with a plurality of grooves, and puncture type terminals used for being electrically connected with windings on the coil skeleton are inserted in the grooves.

Further, including the rotor subassembly, the rotor subassembly includes rotor shaft, rotor core and barn door, rotor core has a plurality of rotor salient poles, rotor core's center is provided with the installation shaft hole, rotor core fixes on the rotor shaft that the excircle has protruding muscle through the installation shaft hole, the barn door is provided with a plurality of evenly distributed's that correspond with rotor salient pole quantity on its circumference portion of being in the light, the center of barn door be provided with the flanging hole that rotor shaft excircle interference fit is connected, rotor core's rotor salient pole is fixed with the relative angle of the portion of being in the light of barn door, the epaxial fan that is provided with of rotor, the fan is located between rotor core and the front end housing.

Further, the both ends of rotor shaft are fixed with front bearing and rear bearing respectively, the center of front end housing is provided with the front bearing room, the front bearing sets up in the front bearing room, the center of rear end housing is equipped with the rear bearing room, the rear bearing sets up in the rear bearing room.

The controller is arranged between the coil framework and the rear end cover and fixed on the coil framework, a plurality of welding discs are arranged on the controller, and the welding discs are welded with the puncture type terminals.

Furthermore, a plurality of through heat dissipation holes are formed in the side wall of the rear end cover, and a plurality of rear reinforcing ribs are uniformly arranged on the outer circumferential direction of a rear bearing chamber of the rear end cover.

Further, a radial grid is arranged between the outer ring of the front bearing chamber of the front end cover and the edge shell of the bottom wall of the front end cover, and a front reinforcing rib is arranged between the front positioning protrusion and the outer wall of the outer edge of the grid.

By adopting the technical scheme, the front end cover, the rear end cover and the stator core do not need to be additionally provided with spigot structures, and the coaxiality of the front end cover, the rear end cover and the stator core can be ensured by the front positioning boss and the rear positioning boss, so that the air gap between a rotor assembly and a stator assembly of the motor is uniform, and the operation is balanced. The utility model does not need a motor shell, and the excircle part, the front end cover and the rear end cover of the stator core protect the internal parts such as a motor rotor component, a controller and the like. The utility model reduces the complexity of iron core stamping and stacking, and has the advantages of simple structure and low processing cost.

Drawings

Fig. 1 is a front view of a switched reluctance motor of the present invention;

fig. 2 is a schematic diagram of an internal structure of a switched reluctance motor according to the present invention;

FIG. 3 is a schematic view of the inside structure of the rear end cap of the present invention;

FIG. 4 is a schematic view of the inside structure of the front end cap of the present invention;

FIG. 5 is an exploded schematic view of the stator assembly of the present invention;

fig. 6 is a schematic view of a stator core according to the present invention;

FIG. 7 is a schematic diagram of the coil former of the present invention;

FIG. 8 is a front view of the rotor assembly of the present invention;

FIG. 9 is a side view of a rotor assembly of the present invention;

FIG. 10 is a top view of the controller of the present invention;

fig. 11 is a schematic structural diagram of a heat dissipation air duct according to the present invention.

Detailed Description

In order that the present invention may be more readily and clearly understood, a more particular description of the utility model briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

As shown in fig. 1 to 10, a switched reluctance motor includes a front end cover 1, a rear end cover 2, a controller 4, a stator assembly 3, and screws 7.

As shown in fig. 4, a front positioning protrusion 13 is provided on one side end surface of the opening of the front end cover 1, and a threaded hole 131 is provided in the center of the front positioning protrusion 13.

As shown in fig. 3, a plurality of rear positioning protrusions 25 are uniformly arranged on the end surface of one side of the opening of the rear end cover 2 in the axial direction, the length of the rear positioning protrusions 25 extending from the end surface in the axial direction is 3-5mm, and a through screw mounting hole 251 is formed in the center of each rear positioning protrusion 25.

As shown in fig. 5 to 7, the stator assembly 3 includes a stator core 31 and a coil bobbin 32, a yoke portion of the stator core 31 is provided with a convex portion mounting hole 313 for inserting the front positioning protrusion 13 and the rear positioning protrusion 25, and the convex portion mounting hole 313 axially penetrates through the stator core 31. The front positioning projection 13 and the rear positioning projection 25 are identical in structure and shape, and the front positioning projection and the rear positioning projection are in clearance fit with the projection mounting hole 313. The stator core 31 has a plurality of stator salient poles 311 on the inner circumference thereof, the coil bobbin 32 has a plurality of coil bobbins 322 therein, the coil bobbins 322 are wrapped around the stator salient poles 311, and the coils 34 are wound around the coil bobbins 322. The radial outer edge of one axial end of the bobbin 32 is provided with a plurality of grooves 33, and piercing terminals 35 for electrically connecting with windings 34 on the bobbin 32 are inserted into the grooves 33.

As shown in fig. 2, the screws 7 are screwed into the screw holes 131 of the front positioning bosses 13 through the screw mounting holes 251 of the rear positioning bosses 25 and the boss mounting holes 313 of the stator core 31 in this order to fixedly connect the rear end cover 2, the stator core 31, and the front end cover 1.

The connecting structure of the front end cover 1, the rear end cover 2 and the stator assembly 3 can ensure the coaxiality of the front end cover and the rear end cover and the stator core 31 through the front positioning protrusion and the rear positioning protrusion, so that the air gap between the rotor assembly 6 and the stator assembly 3 of the motor is uniform, and the operation is balanced; the outer circle part of the stator core 31, the front end cover 1 and the rear end cover 2 protect internal parts such as the motor rotor assembly 6 and the controller 4.

As shown in fig. 6, the boss mounting holes 313 are located on the outer side in the radial direction of the stator salient poles 311, and this structure has the least influence on the magnetic path in the stator assembly 3.

As shown in fig. 1 and 10, the controller 4 is disposed between the bobbin 32 and the rear end cap 2, the controller 4 is fixed on the bobbin 32, a plurality of pads 44 are disposed on the controller 4, the pads 44 are welded to the piercing terminals 35, an abdicating slot 411 for passing the screw 7 is disposed at an edge of the controller 4, and an abdicating hole 412 for abdicating the front bearing 63 and the rear bearing 64 during motor assembly is disposed at a center of the controller 4.

As shown in fig. 8 and 9, the rotor assembly 6 includes a rotor shaft 61, a rotor core 62, a front bearing 63, a rear bearing 64 and a light blocking plate 65, the rotor core 62 has a plurality of rotor salient poles 621, a mounting shaft hole is provided at the center of the rotor core 62, the rotor core 62 is fixed on the rotor shaft 61 with a convex rib at the outer circle through the mounting shaft hole, the front bearing 63 and the rear bearing 64 are respectively fixed at both ends of the rotor shaft 61, the front bearing 63 is disposed in the front bearing chamber 11, and the rear bearing 64 is disposed in the rear bearing chamber 22.

The light barrier 65 is provided with a plurality of light blocking portions 651 which are uniformly distributed and correspond to the rotor salient poles 621 in number on the circumference of the light barrier 65, the light barrier 65 is axially installed between the rear bearing 64 and the rotor core 62, the light barrier 65 is made of a metal plate material through stamping, the center of the light barrier 65 is provided with a flanging hole 652 which is in interference fit connection with the excircle of the rotor shaft 61, the relative angle between the rotor salient poles 621 of the rotor core 62 and the light blocking portions 651 of the light barrier 65 is fixed, and when the rotor core 62 and the light barrier 65 are assembled, the relative position between the rotor core 62 and the light barrier 65 is guaranteed to be fixed through an auxiliary positioning tool. Two position sensors 47 installed on the opposite side of the PCB 41 determine the angular position of the rotor assembly 6 by detecting the rotor assembly 6 installed with the light barrier 65, and when the rotor assembly 6 rotates to a preset position, a control circuit on the controller 4 controls the power tube 42 to be turned on or off, so that the coil windings 34 on the corresponding stator assembly 3 are powered on or off, and the rotor assembly 6 continuously rotates under the electromagnetic force of the coils.

As shown in fig. 3, the side wall of the rear cover 2 is provided with a plurality of through heat dissipation holes 23, and a plurality of rear ribs 24 are uniformly provided on the outer circumferential side of the rear bearing chamber 22 of the rear cover 2.

As shown in fig. 4, a radial grid 12 is provided between the outer ring of the front bearing chamber 11 of the front end cover 1 and the edge casing of the bottom wall of the front end cover 1, and a front rib 14 is provided between the front positioning projection 13 and the outer wall of the outer edge of the grid 12. When the motor rotates, the fan 66 rotates along with the rotor shaft 61, and the air near the front end cover 1 flows into the gap between the grilles 12, passes through the coil windings 34 on the stator assembly 3 under the action of the fan 66, and flows out of the heat dissipation holes 23 of the rear end cover 2. As shown in fig. 11, the heat dissipation air duct formed by the gaps between the grids 12, the fan 66 and the heat dissipation holes 23 can cool the coil windings 34 on the stator assembly 3 and the power tubes on the controller 4 at the same time.

The technical problems, technical solutions and advantages of the present invention have been described in detail with reference to the above embodiments, and it should be understood that the above embodiments are merely exemplary and not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A switched reluctance machine, comprising:

the front end cover comprises a front end cover (1), wherein a front positioning protrusion (13) is arranged on the end surface of one side of an opening of the front end cover (1), and a threaded hole (131) is formed in the center of the front positioning protrusion (13);

the rear end cover (2), a plurality of rear positioning protrusions (25) are uniformly arranged on the end face of one side of the opening of the rear end cover (2) in the axial direction, and the centers of the rear positioning protrusions (25) are provided with through screw mounting holes (251);

the stator assembly (3) comprises a stator core (31), a yoke part of the stator core (31) is provided with a convex part mounting hole (313) for inserting the front positioning boss (13) and the rear positioning boss (25), and the convex part mounting hole (313) axially penetrates through the stator core (31);

and the screw (7) sequentially penetrates through a screw mounting hole (251) of the rear positioning protrusion (25) and a protrusion mounting hole (313) of the stator core (31) and is screwed into a threaded hole (131) of the front positioning protrusion (13), and the rear end cover (2), the stator core (31) and the front end cover (1) are fixedly connected.

2. A switched reluctance machine according to claim 1, wherein: the boss mounting hole (313) is located outside in the radial direction of the stator salient pole (311).

3. A switched reluctance machine according to claim 1, wherein: the inner periphery of the stator core (31) is provided with a plurality of stator salient poles (311).

4. A switched reluctance machine according to claim 3, wherein: the stator assembly (3) comprises a coil framework (32), a plurality of coil frames (322) are arranged in the coil framework (32), the coil frames (322) are wrapped on the stator salient poles (311), and windings (34) are wound on the coil frames (322).

5. The switched reluctance machine of claim 4, wherein: the coil frame is characterized in that a plurality of grooves (33) are formed in the radial outer edge of one axial end of the coil frame (32), and puncture type terminals (35) which are electrically connected with windings (34) on the coil frame (32) are inserted into the grooves (33).

6. A switched reluctance machine according to claim 1, wherein: comprises a rotor assembly (6), the rotor assembly (6) comprises a rotor shaft (61), a rotor iron core (62) and a light barrier (65), the rotor core (62) has a plurality of rotor salient poles (621), a mounting shaft hole is provided at the center of the rotor core (62), the rotor iron core (62) is fixed on a rotor shaft (61) with convex ribs on the excircle through a mounting shaft hole, the light-blocking panel (65) is provided on its circumference with a plurality of light-blocking sections (651) distributed uniformly in a number corresponding to the number of rotor salient poles (621), the center of the light barrier (65) is provided with a flanging hole (652) which is connected with the excircle of the rotor shaft (61) in an interference fit way, the relative angle between the rotor salient pole (621) of the rotor core (62) and the light blocking part (651) of the light blocking plate (65) is fixed, the rotor shaft (61) is provided with a fan (66), and the fan (66) is located between the rotor core (62) and the front end cover (1).

7. The switched reluctance machine of claim 6, wherein: the two ends of the rotor shaft (61) are respectively fixed with a front bearing (63) and a rear bearing (64), the center of the front end cover (1) is provided with a front bearing chamber (11), the front bearing (63) is arranged in the front bearing chamber (11), the center of the rear end cover (2) is provided with a rear bearing chamber (22), and the rear bearing (64) is arranged in the rear bearing chamber (22).

8. The switched reluctance machine of claim 5, wherein: including controller (4), controller (4) set up between coil skeleton (32) and rear end cap (2), controller (4) are fixed on coil skeleton (32), be provided with a plurality of pads (44) on controller (4), pad (44) and puncture type terminal (35) welding.

9. A switched reluctance machine according to claim 7, wherein: the side wall of the rear end cover (2) is provided with a plurality of through heat dissipation holes (23), and a plurality of rear reinforcing ribs (24) are uniformly arranged on the outer circumferential direction of a rear bearing chamber (22) of the rear end cover (2).

10. A switched reluctance machine according to claim 7, wherein: radial grids (12) are arranged between the outer ring of a front bearing chamber (11) of the front end cover (1) and the edge shell of the bottom wall of the front end cover (1), and front reinforcing ribs (14) are arranged between the front positioning protrusions (13) and the outer wall of the outer edge of the grids (12).