CN112769299A

CN112769299A - Rare earth-free motor

Info

Publication number: CN112769299A
Application number: CN202110183348.9A
Authority: CN
Inventors: 刘双凤
Original assignee: Suzhou Meili Tool Technology Co ltd
Current assignee: Suzhou Meili Tool Technology Co ltd
Priority date: 2021-02-10
Filing date: 2021-02-10
Publication date: 2021-05-07

Abstract

The invention discloses a rare earth-free motor, comprising: the motor body is connected with the controller through a lead, the motor body comprises a shell, a front positioning part and a rear positioning part, the rotor comprises a power output shaft, a plurality of rotor electromagnetic windings and a power connector, and the power output shaft extends out of the shell from the center of the front positioning part; the permanent magnet motor comprises a stator, a rotor and a controller, wherein the stator is composed of a plurality of stator electromagnetic windings, the rotor electromagnetic windings are connected with a power connector, the power connector is in contact with a corresponding electric conductor, and the electric conductor is connected with the controller through a conducting wire.

Description

Rare earth-free motor

Technical Field

The invention relates to the field of electromechanical equipment, in particular to a rare earth-free motor.

Background

The traditional motor generally uses neodymium iron boron class permanent magnet to make into the magnetic shoe, form the rotating field in the motor, will be rotatory under the effect of rotating field after the rotor circular telegram, but this kind of motor mainly has the problem in two aspects, one is that the neodymium iron boron permanent magnet is because need use the preparation of precious tombarthite neodymium element, so the price is higher, on the other hand, the permanent magnet still can keep magnetism when the motor is not used, lead to debris such as iron fillings in the motor can automatic absorption environment, this kind of debris are difficult to wash and can also get into in the motor gap, arouse the motor damage.

Disclosure of Invention

The invention mainly solves the technical problem of providing a rare earth-free motor, which can reduce the use of rare earth permanent magnets in the motor and save rare earth resources.

In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a rare earth-free motor including: the motor body is connected with the controller through a lead, the motor body comprises a casing for mounting components, a stator, a rotor and a conductor, the casing is composed of a shell, a front positioning part and a rear positioning part, the rotor comprises a power output shaft, a plurality of rotor electromagnetic windings and a power supply connector, and the power output shaft extends out of the casing from the center of the front positioning part; the stator is composed of a plurality of stator electromagnetic windings, the rotor electromagnetic windings are connected with a power connector, the power connector is in contact with a corresponding electric conductor, and the electric conductor is connected with the controller through a lead.

In a preferred embodiment of the invention, the rotor electromagnetic windings are uniformly distributed around the power output shaft, and are connected with the corresponding electric conductors through power connectors.

In a preferred embodiment of the present invention, the power supply connector includes a plurality of pairs of conducting rings, any two conducting rings are not in contact with each other, an insulating material is filled between the conducting rings and the power output shaft, a pair of rotor coil connecting sheets is led out from each pair of conducting rings, the terminals of the rotor electromagnetic windings are respectively connected with the corresponding coil connecting sheets, and the wires led out from the controller form a loop with the conducting rings and the rotor electromagnetic windings through a brush structure.

In a preferred embodiment of the present invention, the conducting ring of the rotor is a circular ring structure without breaking in the middle.

In a preferred embodiment of the present invention, the conductive device is provided with an elastic structure, one end of the conductive device is in contact with the conductive ring, and the other end of the conductive device is connected with the controller through a wire.

In a preferred embodiment of the invention, the controller is respectively connected with the stator electromagnetic winding and the rotor electromagnetic winding, and the controller is provided with a circuit board capable of controlling the connection sequence and the current magnitude of the stator electromagnetic winding and the rotor electromagnetic winding

The invention has the beneficial effects that: the technical scheme of the invention is that the electromagnetic winding is used for replacing a permanent magnet magnetic shoe in a common motor to form a rotating magnetic field of the rotor, so that on one hand, the use of the permanent magnet can be reduced, precious rare earth resources are saved, and the overall cost is reduced, on the other hand, because the electromagnetic winding is generally an iron core, the demagnetization is fast when the electromagnetic winding is not used, impurities such as iron chips in the environment and the like cannot be adsorbed on the motor when the electromagnetic winding is placed, the damage probability of the motor is reduced, and the cleaning is easy.

Drawings

FIG. 1 is a schematic cross-sectional view of a preferred embodiment of the present invention;

FIG. 2 is an enlarged view of the rotor power connection position structure;

the parts in the drawings are numbered as follows:

1. the power output shaft, 2. the bearing, 3. the casing, 4. the stator, 5. the rotor, 6. the stator wire, 7. the controller, 8. the rotor power connector, 9. the brush, 10. the rotor wire.

801. The rotor coil connecting piece comprises a first copper ring, 802, a second copper ring, 803, a first rotor coil connecting piece, 804 and a second rotor coil connecting piece.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to fig. 1 and 2, an embodiment of the present invention includes:

example 1

A rare earth-free electric machine, comprising: the motor comprises a controller 7 and a motor main body, wherein one end of the motor main body is connected with the controller 7 through a lead, the motor main body comprises a machine shell 3 for installing components, a stator 4 and a rotor 5, the machine shell 3 is composed of a shell, a front positioning part and a rear positioning part, and the stator 4 and the rotor 5 are installed inside the machine shell 3.

The stator 4 is formed by connecting 5 groups of stator electromagnetic windings with the same specification in series. The 5 groups of stator electromagnetic windings with the same specification are fixed on the inner wall of the shell, the distance between every two adjacent groups of stator electromagnetic windings is equal, and the controller 7 is connected with the stator electromagnetic windings in series through the stator wires 6 to form a loop.

The rotor 5 comprises power output shafts 1 and 1 pair of rotor electromagnetic windings symmetrically arranged on two sides of the power output shaft 1, the power output shaft 1 extends out of the machine shell 3 from the center position of a front positioning part from the power output shaft, bearings 2 are arranged at the center positions of the front positioning part and the rear positioning part, two ends of the power output shaft 1 are respectively bridged on the front positioning part and the rear positioning part of the machine shell 3 through the bearings 2, and the power output shaft 1 is supported to rotate stably.

The pair of rotor electromagnetic windings 1 are symmetrically arranged on two sides of the power output shaft 1, and the rotor electromagnetic windings are connected with a controller 7 through a rotor lead 10 through a power connector 8 fixed at the shaft end of the power output shaft 1. The power supply connector 8 comprises a pair of conductive copper rings with unbroken middle parts, namely a first copper ring 801 and a second copper ring 802, the two conductive copper rings are not in contact with each other, insulating materials are filled between the two conductive copper rings and the power output shaft 1 to prevent short circuit, a rotor coil connecting sheet is led out from the inner side of each conductive copper ring, a first rotor coil connecting sheet 803 is led out from the first copper ring 801, a second rotor coil connecting sheet 804 is led out from the second copper ring 802, and the first rotor coil connecting sheet 803 and the second rotor coil connecting sheet 804 are respectively connected with two connectors on the rotor 5.

The electric conductor for connecting the power supply connector and the controller is an electric brush 9, two rotor wires 10 led out from the controller 7 are respectively kept in contact with the first copper ring 801 and the second copper ring 802 through the two electric brushes 9 with spring buffer structures, and the controller 7, the conductive copper rings and the rotor electromagnetic winding are connected in series to form a complete loop.

Example 2

The stator 4 is formed by connecting 6 groups of stator electromagnetic windings with the same specification in series. The 6 groups of stator electromagnetic windings with the same specification are fixed on the inner wall of the shell, the distance between every two adjacent groups of stator electromagnetic windings is equal, and the controller 7 is connected with the stator electromagnetic windings in series through the stator wires 6 to form a loop.

The pair of rotor electromagnetic windings 1 are symmetrically arranged on two sides of the power output shaft 1, and the rotor electromagnetic windings are connected with a controller 7 through a rotor lead 10 through a power connector 8 fixed at the shaft end of the power output shaft 1. The power supply connector 8 comprises two conductive copper rings with unbroken middle parts, namely a first copper ring 801 and a second copper ring 802, the two conductive copper rings are not in contact with each other, insulating materials are filled between the two conductive copper rings and the power output shaft 1 to prevent short circuit, a rotor coil connecting sheet is led out from the inner side of each conductive copper ring, a first rotor coil connecting sheet 803 is led out from the first copper ring 801, a second rotor coil connecting sheet 804 is led out from the second copper ring 802, and the first rotor coil connecting sheet 803 and the second rotor coil connecting sheet 804 are respectively connected with two connectors on the rotor 5.

The working principle of the invention is as follows:

when the motor works, the controller 7 is switched on, the stator electromagnetic winding and the rotor electromagnetic winding are electrified simultaneously, the stator electromagnetic winding generates a rotating magnetic field under the action of current, and the rotor generates an N/S pole and then rotates in the rotating magnetic field under the electrified condition. When the motor does not work, the controller 7 is closed, the current is cut off in the stator loop and the rotor loop at the same time, the magnetic field is not generated any more, and the rotation is stopped. Because the iron core is generally used in the electromagnetic winding, the demagnetization can be automatically and quickly realized, the surface of the motor has no magnetic force under the condition of nonuse, the attraction force of the motor to scrap iron and the like in the surrounding environment when the motor is placed can be reduced, the cleaning is convenient, and because the stator of the motor does not use a permanent magnet, the using amount of magnetic shoes to rare earth is reduced, and the waste of resources is reduced.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A rare earth-free electric machine, comprising: the motor body is connected with the controller through a lead, the motor body comprises a casing for mounting components, a stator, a rotor and a conductor, the casing is composed of a shell, a front positioning part and a rear positioning part, the rotor comprises a power output shaft, a plurality of rotor electromagnetic windings and a power supply connector, and the power output shaft extends out of the casing from the center of the front positioning part; the stator is composed of a plurality of stator electromagnetic windings, the rotor electromagnetic windings are connected with power connectors, the power connectors are in contact with corresponding conductive devices, and the conductive devices are connected with the controller through wires.

2. The rare earth-free motor of claim 1, wherein the plurality of rotor electromagnetic windings are mounted around the power output shaft in a uniformly distributed manner, the rotor electromagnetic windings being connected to respective corresponding electrical conductors by power connections.

3. The rare earth-free motor according to claim 2, wherein the power supply connector comprises a plurality of pairs of conducting rings, any two conducting rings are not in contact with each other, insulating materials are filled between the conducting rings and the power output shaft, a pair of rotor coil connecting sheets are led out from each pair of conducting rings, the wire ends of the rotor electromagnetic windings are respectively connected with the corresponding coil connecting sheets, and wires led out from the controller form a loop with the conducting rings and the rotor electromagnetic windings through a brush structure.

4. The rare earth-free motor as claimed in claim 3, wherein the conductive ring of the rotor is a circular ring structure without a break in the middle.

5. The rare earth-free motor as claimed in claim 3, wherein the conductor is provided with an elastic structure, one end of the conductor is in contact with the conductive ring, and the other end of the conductor is connected with the controller through a lead.

6. The rare-earth-free motor according to claim 1, wherein the controller is connected with the stator electromagnetic winding and the rotor electromagnetic winding respectively, and is provided with a circuit board capable of controlling the connection sequence and the current magnitude of the stator electromagnetic winding and the rotor electromagnetic winding.