CN211959032U

CN211959032U - Large-torque brushless excitation direct current motor

Info

Publication number: CN211959032U
Application number: CN202020933288.9U
Authority: CN
Inventors: 刘国平; 谢芳宝
Original assignee: Jiangxi Pingbao Technology Co ltd
Current assignee: Jiangxi Pingbao Technology Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-11-17
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a brushless excitation direct current motor of big moment of torsion, which comprises a housin, the internal surface fixedly connected with stator of casing, the inner wall fixed connection connecting block of stator, one side fixedly connected with excitation frame of stator is kept away from to the connecting block, the side surface fixedly connected with excitation coil of excitation frame, the first lid of right flank fixedly connected with of casing, the first bearing of the inside fixedly connected with of first lid, the internal surface fixedly connected with pivot of first bearing, the magnetic pole before the side surface fixedly connected with of pivot, the side surface of pivot just is located the right side fixedly connected with adapter sleeve of preceding magnetic pole, the side surface of pivot just is located the right side fixedly connected with back magnetic pole of adapter sleeve. The utility model discloses, adopted brushless excitation's excitation mode for the motor is maintained simply, and the structure is reliable, can provide great torque, and life is longer, and is not fragile, can use under more occasion.

Description

Large-torque brushless excitation direct current motor

Technical Field

The utility model relates to a direct current motor structure field especially relates to a large-torque brushless excitation direct current motor.

Background

Brushless excitation is an excitation system that does not require passing slip rings and carbon brushes. The medium and small three-phase synchronous generator is mainly divided into a brushless excitation system and a brush excitation system, the brushless excitation system excites an excitation winding of an alternating current exciter by a voltage regulator, alternating current generated by an armature winding of the exciter is rectified by a rotating rectifier and then is excited by a field winding of a main generator, the brushless excitation system has the advantage that the brushless excitation system cannot be replaced per se, can stably operate under dangerous working conditions, and is a preferred excitation mode of modern medium and small motors and large brushless excitation systems.

The existing direct current motor utilizes an excitation mode of a carbon brush and a slip ring, but for some machines needing larger torque, the motor can increase the working efficiency of the motor, generate more heat and prevent the heat from being discharged, so that the motor is burnt to cause accidents, and the brushless excitation mode is used to ensure that the brushless excitation motor can stably provide large torque power.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a large-torque brushless excitation direct current motor.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a large-torque brushless excitation direct current motor comprises a shell, wherein the inner surface of the shell is fixedly connected with a stator, the inner wall of the stator is fixedly connected with a connecting block, one side of the connecting block away from the stator is fixedly connected with an excitation frame, the side surface of the excitation frame is fixedly connected with an excitation coil, the right side surface of the shell is fixedly connected with a first cover body, the inner part of the first cover body is fixedly connected with a first bearing, the inner surface of the first bearing is fixedly connected with a rotating shaft, the side surface of the rotating shaft is fixedly connected with a front magnetic pole, the side surface of the rotating shaft is positioned on the right side of the front magnetic pole and is fixedly connected with an adapter sleeve, the side surface of the rotating shaft is positioned on the right side of the adapter sleeve and is fixedly connected with a rear magnetic pole, the side surface of the rotating shaft, the right side fixedly connected with second lid of casing, the inside fixed mounting hole that is provided with of second lid.

As a further description of the above technical solution:

the input end of the excitation coil is provided with a rectifier, and the excitation coil is electrically connected with the rectifier through an electric wire.

As a further description of the above technical solution:

the inside and the second bearing fixed connection of mounting hole, the one end of pivot extends to the outside of first lid.

As a further description of the above technical solution:

the stator comprises a stator ring, stator teeth are arranged on the inner surface of the stator ring, and stator windings are fixedly connected to the side surfaces of the stator teeth.

As a further description of the above technical solution:

the positions of the front magnetic pole and the rear magnetic pole are positioned inside the stator ring, the position of the exciting coil is positioned between the front magnetic pole and the rear magnetic pole, and the position of the fan is positioned inside the second cover body.

As a further description of the above technical solution:

the lower surface of the shell is fixedly connected with a fixing frame, and the right side surface of the second cover body is provided with a ventilation opening.

The utility model discloses following beneficial effect has:

compared with the prior art, the large-torque brushless excitation direct current motor adopts a brushless excitation mode, so that the motor is simple to maintain, reliable in structure, long in service life and not easy to damage, and can be used in more occasions.

Drawings

Fig. 1 is a schematic diagram of an internal structure of a large-torque brushless excitation dc motor according to the present invention;

fig. 2 is a schematic view of the overall structure of a large-torque brushless excitation dc motor according to the present invention;

fig. 3 is a cross-sectional view of a large-torque brushless excitation dc motor according to the present invention.

Illustration of the drawings:

1. a housing; 2. a first cover body; 3. a first bearing; 4. a rotating shaft; 5. a stator; 6. connecting blocks; 7. a field coil; 8. an excitation frame; 9. a second bearing; 10. a fan; 11. a fixed mount; 12. a front magnetic pole; 13. connecting sleeves; 14. a rear magnetic pole; 15. a rectifier; 16. mounting holes; 17. a second cover body; 501. a stator ring; 502. stator teeth; 503. and a stator winding.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, the utility model provides a pair of large-torque brushless excitation dc motor: comprises a shell 1, a containing device, a stator 5 is fixedly connected to the inner surface of the shell 1, a rotating shaft 4 is enabled to rotate, a connecting block 6 is fixedly connected to the inner wall of the stator 5, an excitation frame 8 is connected, one side of the connecting block 6, which is far away from the stator 5, is fixedly connected with the excitation frame 8, an excitation coil 7 is installed, an excitation coil 7 is fixedly connected to the side surface of the excitation frame 8, the rotating shaft 4 is magnetized, a first cover body 2 is fixedly connected to the right side surface of the shell 1, the rotating shaft 4 is fixed, a first bearing 3 is fixedly connected to the inside of the first cover body 2, the position of the rotating shaft 4 is enabled to be fixed, a rotating shaft 4 is fixedly connected to the inner surface of the first bearing 3, an external part is connected to rotate, a front magnetic pole 12 is fixedly connected to the side surface of the rotating shaft 4, a connecting sleeve 13 is, the rotating shaft 4 is enabled to rotate under the action of the rotating shaft, the fan 10 is fixedly connected to the side surface of the rotating shaft 4 and located on the right side of the rear magnetic pole 14, internal elements of the motor are cooled, the second bearing 9 is fixedly connected to one end, far away from the first cover body 2, of the rotating shaft 4, the second cover body 17 is fixedly connected to the right side of the shell 1, the position of the rotating shaft 4 is fixed, and the second bearing 9 is installed in the second cover body 17 through a mounting hole 16 fixedly arranged inside the second cover body 17.

The input end of the excitation coil 7 is provided with a rectifier 15 for rectifying the incoming current, so as to supply power to the excitation coil 7, the excitation coil 7 is electrically connected with the rectifier 15 through an electric wire, the inside of the mounting hole 16 is fixedly connected with the second bearing 9, so that the position of the rotating shaft 4 is fixed in the motor, one end of the rotating shaft 4 extends to the outside of the first cover body 2, the stator 5 comprises a stator ring 501, the inner surface of the stator ring 501 is provided with stator teeth 502, the side surface of the stator teeth 502 is fixedly connected with a stator winding 503, so that the stator 5 can realize the function, the positions of the front magnetic pole 12 and the rear magnetic pole 14 are positioned in the stator 5, the position of the excitation coil 7 is positioned between the front magnetic pole 12 and the rear magnetic pole 14, so that the excitation coil 7 can drive the rotating shaft 4 to rotate, the position of the fan 10 is positioned in the, the lower surface of the shell 1 is fixedly connected with a fixing frame 11, so that the motor is convenient to fix, and the right side surface of the second cover body 17 is provided with a ventilation opening, so that wind power is smooth.

The working principle is as follows: during installation, the stator 5 is installed on the inner surface of the shell 1, the excitation coil 7 is installed on the excitation frame 8, the excitation frame 8 is installed on the stator 5, the rear magnetic pole 14, the connecting sleeve 13 and the front magnetic pole 12 are installed at corresponding positions on the rotating shaft 4 at one time and then are placed in the shell 1, one end of the rotating shaft 4 extends out of the first cover body 2 to enable one end of the rotating shaft to be fixed, the first cover body 2 is fixed on the shell 1, the fan 10 is installed at the other end of the rotating shaft 4, the second cover body 17 is installed on the shell 1, and assembly is completed.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A large-torque brushless excitation direct current motor comprises a shell (1), and is characterized in that: the inner surface of the shell (1) is fixedly connected with a stator (5), the inner wall of the stator (5) is fixedly connected with a connecting block (6), one side of the connecting block (6) away from the stator (5) is fixedly connected with an excitation frame (8), the side surface of the excitation frame (8) is fixedly connected with an excitation coil (7), the right side surface of the shell (1) is fixedly connected with a first cover body (2), the inside of the first cover body (2) is fixedly connected with a first bearing (3), the inner surface of the first bearing (3) is fixedly connected with a rotating shaft (4), the side surface of the rotating shaft (4) is fixedly connected with a front magnetic pole (12), the side surface of the rotating shaft (4) is positioned on a right side of the front magnetic pole (12) and is fixedly connected with a connecting sleeve (13), the side surface of the rotating shaft (4) is positioned on a right side, the side surface of pivot (4) just is located right side fixedly connected with fan (10) of back magnetic pole (14), the one end fixedly connected with second bearing (9) of first lid (2) are kept away from in pivot (4), the right side fixedly connected with second lid (17) of casing (1), the inside of second lid (17) is fixed and is provided with mounting hole (16).

2. A high torque brushless dc motor according to claim 1, wherein: the input of excitation coil (7) is provided with rectifier (15), excitation coil (7) pass through electric wire and rectifier (15) electric connection.

3. A high torque brushless dc motor according to claim 1, wherein: the inside and the second bearing (9) fixed connection of mounting hole (16), the outside of the one end extension of pivot (4) to first lid (2).

4. A high torque brushless dc motor according to claim 1, wherein: the stator (5) comprises a stator ring (501), stator teeth (502) are arranged on the inner surface of the stator ring (501), and stator windings (503) are fixedly connected to the side surfaces of the stator teeth (502).

5. A high torque brushless dc motor according to claim 1, wherein: the positions of the front magnetic pole (12) and the rear magnetic pole (14) are positioned inside the stator ring (501), the position of the exciting coil (7) is positioned between the front magnetic pole (12) and the rear magnetic pole (14), and the position of the fan (10) is positioned inside the second cover body (17).

6. A high torque brushless dc motor according to claim 1, wherein: the lower surface of the shell (1) is fixedly connected with a fixing frame (11), and the right side surface of the second cover body (17) is provided with a ventilation opening.