CN210490699U

CN210490699U - Brushless DC motor capable of simultaneously outputting double torque

Info

Publication number: CN210490699U
Application number: CN201921881099.5U
Authority: CN
Inventors: 黄炳锋; 任映平
Original assignee: Shenzhen Zhongping Electromechanical Co Ltd
Current assignee: Shenzhen Zhongping Electromechanical Co Ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-05-08
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses a brushless DC motor which belongs to the technical field of motors, in particular to a brushless DC motor which can output double torque simultaneously, comprising a PCB board, an outer rotor, an inner rotor and an end cover, wherein the left side wall of the PCB board is fixedly provided with a stator, the outer wall of the stator is uniformly provided with a plurality of Hall sensors, the middle part of the PCB board is inserted with a rotating shaft, the left side wall of the rotating shaft is fixedly provided with the inner rotor, the left side wall of the inner rotor is fixedly provided with the outer rotor, the inner wall of the outer rotor is uniformly fixedly provided with a permanent magnet, the right side wall of the PCB board is fixedly provided with the end cover by a bolt, the middle part of the end cover is clamped with a bearing, the bearing is clamped with the rotating shaft, the bottom of the right side wall of the PCB board is fixedly provided with a controller, the controller is electrically connected with the, the comprehensive effect of the total torque pulsation of the motor can be effectively reduced.

Description

Brushless DC motor capable of simultaneously outputting double torque

Technical Field

The utility model relates to the technical field of electric machines, specifically be the brushless DC motor of simultaneous output double moment.

Background

The brushless direct current motor is composed of a motor main body and a driver, and is a typical electromechanical integration product. A brushless motor refers to a motor without a brush and a commutator (or a slip ring), which is also called a commutator-less motor. As early as the nineteenth birth, the practical motor produced was brushless, i.e., an ac squirrel cage asynchronous motor, which has been widely used. However, asynchronous motors have a number of insurmountable drawbacks, which have led to slow motor technology development. Transistors were produced in the middle of the last century, and therefore, brushless dc motors using transistor commutation circuits instead of brushes and commutators have been produced. This new brushless motor, called electronically commutated dc motor, overcomes the drawbacks of the first generation brushless motors.

The brushless dc motor in the prior art is inconvenient to control torque ripple and affects torque density of the motor, so that it is necessary to develop a brushless dc motor that outputs double torque simultaneously.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

In view of the problems existing in the prior art, the utility model discloses.

Therefore, the utility model aims at providing a brushless DC motor of output double moment simultaneously, when can keeping high torque density, can effectively reduce the total torque ripple of motor.

For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:

output dual moment's brushless DC motor simultaneously, it includes PCB board, external rotor, inner rotor and end cover, the left side wall fixed mounting of PCB board has the stator, a plurality of hall sensor of the even installation of outer wall of stator, the middle part of PCB board is pegged graft and is had the pivot, the left side fixed mounting of pivot has the inner rotor, the left side wall fixed mounting of inner rotor the external rotor, the even fixed mounting of inner wall of external rotor has permanent magnet, the right side wall of PCB board passes through bolt fixed mounting the end cover, the middle part joint of end cover has the bearing, the bearing with pivot looks joint, the right side wall bottom fixed mounting of PCB board has the controller, the controller with the stator with hall sensor electric connection.

As the preferred scheme of the brushless DC motor of simultaneous output dual moment, wherein: the inner rotor is located in the middle of the inner wall of the stator.

As the preferred scheme of the brushless DC motor of simultaneous output dual moment, wherein: the permanent magnet is located on an outer wall of the stator.

As the preferred scheme of the brushless DC motor of simultaneous output dual moment, wherein: a plurality of neodymium iron boron strong magnets are uniformly arranged on the periphery of the outer wall of the inner rotor.

As the preferred scheme of the brushless DC motor of simultaneous output dual moment, wherein: three first bolt holes are formed in the left side end of the inner rotor, three second bolt holes with through holes corresponding to the first bolt holes are formed in the left side wall of the outer rotor, and the outer rotor is installed on the inner rotor through the first bolt holes, the second bolt holes and fastening bolts.

As the preferred scheme of the brushless DC motor of simultaneous output dual moment, wherein: three or six Hall sensors are uniformly arranged on the outer wall of the stator, and the interval degree or degree is distributed according to the circumference.

Compared with the prior art, the beneficial effects of the utility model are that: the controller is electrified to enable the coil on the stator to generate a magnetic induction line, and the inner rotor and the outer rotor rotate together by utilizing the matching of the magnetic induction line, the permanent magnet and the neodymium iron boron strong magnet, so that the rotation of the rotating shaft is realized, and the total torque pulsation of the motor can be effectively reduced while the hall sensor senses the running speed of the motor to keep high torque density.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor. Wherein:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a system block diagram of the structure of the present invention.

In the figure: 100 PCB board, 110 stator, 120 Hall sensor, 130 controller, 200 external rotor, 210 permanent magnet, 300 internal rotor, 310 rotating shaft, 400 end cap, 410 bearing.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways than those specifically described herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of explanation, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The utility model provides a following technical scheme: the brushless dc motor that outputs double torque simultaneously can effectively reduce the total torque ripple of the motor while maintaining high torque density in the use process, please refer to fig. 1, including a PCB board 100, an outer rotor 200, an inner rotor 300 and an end cap 400;

referring to fig. 1 and 2, the PCB 100 has a stator 110, hall sensors 120 and a controller 130, specifically, the stator 110 is fixedly installed on a left side wall of the PCB 100, the controller 130 is fixedly installed at a bottom of a right side wall of the PCB 100, the controller 130 is electrically connected to the stator 110 and the hall sensors 120, three or six hall sensors 120 are uniformly installed on an outer wall of the stator 110, the hall sensors 120 are circumferentially distributed at intervals of 120 degrees or 60 degrees, and the controller 130 is a PID controller.

Referring to fig. 1 and 2 again, the outer rotor 200 has permanent magnets 210, specifically, the inner wall of the outer rotor 200 is uniformly and fixedly installed with the permanent magnets 210, and the permanent magnets 210 are located on the outer wall of the stator 110;

referring to fig. 1 and 2 again, the inner rotor 300 has a rotating shaft 310, specifically, the rotating shaft 310 is inserted into the middle of the PCB board 100, the inner rotor 300 is fixedly installed at the left end of the rotating shaft 310, the inner rotor 300 is located in the middle of the inner wall of the stator 110, eight neodymium iron boron strong magnets are uniformly installed around the outer wall of the inner rotor 300, three first bolt holes are opened at the left end of the inner rotor 300, three second bolt holes with through-holes corresponding to the first bolt holes are opened at the left wall of the outer rotor 200, and the outer rotor 200 is installed on the inner rotor 300 through the first bolt holes, the second bolt holes and fastening bolts;

referring to fig. 1 again, the end cover 400 has a bearing 410, the end cover 400 is installed on the right side wall of the PCB board 100, the right side wall of the PCB board 100 is fixedly installed on the end cover 400 through a bolt, the bearing 410 is clamped in the middle of the end cover 400, and the bearing 410 is clamped with the rotating shaft 310;

in specific use, as needs the utility model discloses at first electrify controller 130 at the in-process that uses, make the coil on the stator 110 produce the magnetic induction line, utilize the magnetic induction line and permanent magnet 210 and the strong magnet's of neodymium iron boron cooperation, realize the common rotation of inner rotor 300 and outer rotor 200 to realize the rotation of pivot 310, utilize hall sensor 120 perception motor's moving speed.

The hall sensor 120 and the ndfeb ferromagnetic material are not limited to the specific numbers described in the present embodiment, and the numbers thereof may be increased or decreased as necessary.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. Output double moment's brushless DC motor simultaneously, its characterized in that: including PCB board (100), outer rotor (200), inner rotor (300) and end cover (400), the left side wall fixed mounting of PCB board (100) has stator (110), a plurality of hall sensor (120) of the even installation of outer wall of stator (110), the middle part of PCB board (100) is pegged graft and is had pivot (310), the left side fixed mounting of pivot (310) has inner rotor (300), the left side wall fixed mounting of inner rotor (300) outer rotor (200), the even fixed mounting of inner wall of outer rotor (200) has permanent magnet (210), the right side wall of PCB board (100) passes through bolt fixed mounting end cover (400), the middle part joint of end cover (400) has bearing (410), bearing (410) with pivot (310) looks joint, the right side wall bottom fixed mounting of PCB board (100) has controller (130), the controller (130) is electrically connected with the stator (110) and the Hall sensor (120).

2. The brushless dc motor that outputs double torque simultaneously according to claim 1, wherein: the inner rotor (300) is located in the middle of the inner wall of the stator (110).

3. The brushless dc motor that outputs double torque simultaneously according to claim 1, wherein: the permanent magnet (210) is located on an outer wall of the stator (110).

4. The brushless dc motor that outputs double torque simultaneously according to claim 1, wherein: a plurality of neodymium iron boron strong magnets are uniformly arranged on the periphery of the outer wall of the inner rotor (300).

5. The brushless dc motor that outputs double torque simultaneously according to claim 1, wherein: the left side end of the inner rotor (300) is provided with three first bolt holes, the left side wall of the outer rotor (200) is provided with three second bolt holes with through holes corresponding to the first bolt holes, and the outer rotor (200) is installed on the inner rotor (300) through the first bolt holes, the second bolt holes and fastening bolts.

6. The brushless dc motor that outputs double torque simultaneously according to claim 1, wherein: three or six Hall sensors (120) are uniformly arranged on the outer wall of the stator (110), and are distributed at intervals of 120 degrees or 60 degrees according to the circumference.