CN216566930U

CN216566930U - Double-magnetic brushless DC motor

Info

Publication number: CN216566930U
Application number: CN202123100815.1U
Authority: CN
Inventors: 刘茂隆
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-11
Filing date: 2021-12-11
Publication date: 2022-05-20
Anticipated expiration: 2031-12-11

Abstract

A dual-magnet brushless DC motor. The utility model comprises the following components: the stator comprises a stator (1) and a rotor (2), wherein a plurality of groups of stator permanent magnet groups (3) are uniformly distributed on the stator in the axial direction; each group of stator permanent magnet groups consists of a plurality of permanent magnets which are uniformly fixed on the stator in the circumferential direction; four groups of rotor permanent magnet groups (4) opposite to the stator permanent magnet groups are uniformly distributed on the rotor in the axial direction; each group of the rotor permanent magnet groups consists of a plurality of permanent magnets which are uniformly fixed on the rotor in the circumferential direction; and soft iron (6) is fixed on one side of each stator permanent magnet corresponding to the rotor permanent magnet, and an excitation winding (5) is wound outside the soft iron. The utility model is used for the dual-magnet brushless direct current motor.

Description

Double-magnetic brushless DC motor

Technical Field

The utility model belongs to power source machinery, and particularly relates to a double-magnet brushless direct-current motor with neodymium-iron-boron permanent magnet power as a power source.

Background

The common direct current motor is a single magnetic (stator or rotor) motor which can rotate, namely, the common direct current motor depends on the existence of a magnetic field and needs to be electrified and excited, the excitation needs power consumption, the power of the common direct current motor determines the cross section of an iron core, and the larger the cross section is, the higher the power consumption is.

Disclosure of Invention

The present invention is to solve the above problems and to provide a dual-magnet brushless dc motor.

The above purpose is realized by the following technical scheme:

a double-magnetic brushless DC motor comprises a stator and a rotor, wherein a plurality of groups of stator permanent magnet groups are uniformly distributed on the stator in the axial direction;

each group of stator permanent magnet groups consists of a plurality of permanent magnets which are uniformly fixed on the stator in the circumferential direction;

four groups of rotor permanent magnet groups opposite to the stator permanent magnet groups are uniformly distributed on the rotor in the axial direction;

each group of the rotor permanent magnet groups consists of a plurality of permanent magnets which are uniformly fixed on the rotor in the circumferential direction;

soft iron is fixed on one side of each stator permanent magnet corresponding to the rotor permanent magnet, and an excitation winding is wound outside the soft iron.

In the double-magnet brushless direct current motor, each stator permanent magnet group consists of six permanent magnets which are uniformly fixed on the stator at 60 degrees in the circumferential direction.

In the double-magnet brushless direct current motor, each rotor permanent magnet group consists of three permanent magnets which are uniformly fixed on the rotor at 120-degree intervals in the circumferential direction.

The rotor permanent magnets on each group of the rotor permanent magnet groups are staggered by 15 degrees.

The double-magnet brushless direct current motor is characterized in that the number of the stator permanent magnet groups is at least 4.

The axial distance between the permanent magnet groups of the stator in each group of the double-magnet brushless direct current motor is 6-7 cm.

Has the advantages that:

1. the utility model utilizes the principle of magnetic field superposition, utilizes the principle that like poles repel each other and attract each other, the soft iron coil is connected with a direct current power supply, the soft iron shows a magnetic field and polarity after being magnetized, the direction of the magnetic force line is the same as that of the magnetic force line of the permanent magnet, the surface magnetic force of the permanent magnet can be enhanced after superposition, if the soft iron coil is completely in the power-off condition, the rotor can rotate freely between the stators, and repulsion force and attraction force do not exist.

2. The utility model only needs to connect the DC power supply to the soft iron magnet exciting coil to make the soft iron generate polarity, in addition, the stator and the rotor permanent magnets are all configured with the same polarity, the difference between the permanent magnets configured between the large groups on the rotor is 15 degrees, the purpose of setting 15 degrees is to keep the permanent magnets on the stator and the rotor always in the working state to be sucked, no dead point is arranged at any position, and the rapid starting rotation is ensured.

3. When the permanent magnet motor rotates by 15 degrees, two small groups of the four groups of the stator are in power-on and power-off conversion states, and 6 pairs of permanent magnets are always kept in a repulsion state.

4. The brushless DC motor is a dual-magnet, permanent magnet, does not need excitation, and particularly the permanent magnet on the stator plays an important part of a main magnetic field.

5. The double-magnet brushless direct current motor only needs little electric energy to be soft iron excitation, and the magnetic field on the stator is greatly enhanced according to the law that the magnetic fields can be superposed, so that the aim of high efficiency and energy conservation is fulfilled.

Description of the drawings:

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

3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a cross-sectional view taken along section C-C of FIG. 1;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1;

in the figure: 1. a stator; 2. a rotor; 3. a stator permanent magnet; 4. a rotor permanent magnet; 5. an excitation winding; 6. soft iron.

The specific implementation mode is as follows:

example 1:

a kind of double magnetism brushless DC motor, its composition includes stator 1 and trochanter 2, distribute the multiple-unit stator permanent magnet group 3 on the said stator with the axial uniform distribution;

four groups of rotor permanent magnet groups 4 opposite to the stator permanent magnet groups are uniformly distributed on the rotor in the axial direction;

and soft iron 6 is fixed on one side of each stator permanent magnet corresponding to the rotor permanent magnet, and an excitation winding 5 is wound outside the soft iron.

Example 2:

according to the brushless dc motor of embodiment 1, each of the stator permanent magnet groups is composed of six permanent magnets fixed to the stator at an angle of 60 ° in the circumferential direction.

Example 3:

according to the dual-magnet brushless dc motor of embodiment 1, each of the permanent magnet groups of the rotor is composed of three permanent magnets uniformly fixed to the rotor at 120 degrees in the circumferential direction.

Example 4:

the double-magnet brushless dc motor according to

embodiment

1 or 3, wherein the rotor permanent magnets of the respective sets of rotor permanent magnets are arranged with a 15-degree difference in position.

Example 5:

the brushless dc motor of

embodiment

1 or 2, wherein the number of the stator permanent magnet groups is at least 4.

Example 6:

the dual-magnet brushless dc motor of embodiment 5, wherein the axial distance between the permanent magnet sets of each stator is 6-7 cm.

The difference between the permanent magnets arranged among the groups on the rotor is 15 degrees, the purpose of setting 15 degrees is to keep the permanent magnets on the stator and the rotor always in a discharge and suction state in a working state, no dead point exists at any position, rapid starting and rotation are ensured, an ideal working state is achieved, when the position is rotated by 15 degrees, two groups in the four groups of the stator always have a power-on and power-off conversion state, when each group in each group rotates by 60 degrees, the power-on and power-off state is converted once, each group rotates for one circle, the power is switched on and off twice, the two groups are four times, each group rotates for one circle, the soft iron coil on the stator of the group is powered on and off for four times, the four groups rotate for one circle, and the total power-on and power-off times are as follows: the power is switched on for 16 times and is switched off for 16 times, but in a normal working state, only two groups in the eight groups are in a power-on state (namely, in a working state), namely, 6 pairs of permanent magnets are always kept in a repulsion state;

the method for realizing the repelling and sucking working states of the stator and the rotor comprises the following steps: the electric field and the magnetic field can be superposed, this is the basic concept, the core technology of the 'double-magnet brushless DC motor' is realized by the magnetic field superposition principle, the same-pole repulsion and opposite-pole attraction are utilized, here we select the soft iron as the attraction state, two permanent magnets with the same polarity are relatively attracted on the soft iron sheet with a certain thickness, so as to make the two permanent magnets with the same polarity have the attraction process, through adjusting the thickness of the iron sheet, it will change the strength of the attraction force of the two permanent magnets, through adjusting and selecting the best state, we are provided with the soft iron on all the stator permanent magnets, and are provided with the soft iron coil on the soft iron, we can regard the soft iron sheet as a small iron core, if the soft iron sheet is regarded as the DC electromagnet to be superposed on the permanent magnet, then the soft iron coil is connected with the DC power supply, at this time, the soft iron is magnetized to show the magnetic field and the polarity, at this moment, the direction of the magnetic force lines is the same as that of the magnetic force lines of the permanent magnets, the surface magnetic force of the permanent magnets can be enhanced after superposition, if the soft iron coils are all in the power-off condition at the moment, the rotor can rotate freely between the stators, and repulsion force and suction force do not exist.

A dual-magnetic brushless DC motor is started or operated by providing a 100-200V mobile DC power supply with 24V battery through inverter, outputting it by Hall position sensor through control switch circuit, detecting the synchronous position of stator permanent magnet and rotor permanent magnet, and transmitting the DC power supply to stator soft iron coil when rotor rotates by 15 deg, generating strong magnetic field force after the stator permanent magnets are superposed, generating repulsion force to rotor, making rotor rotate by an angle, when rotor rotates by 15 deg, the stator and rotor permanent magnet at a certain position are completely overlapped, the soft iron coil on the stator permanent magnet starts to be electrified, the other group of stator permanent magnet and rotor permanent magnet completely quit (i.e. power off), the power off is firstly electrified, and so on. There is no dead point at any position of 360 degrees of a revolution, so it will rotate continuously at high speed, as marked in the schematic diagram, a, B, C, D, on and off states at different angles.

Claims

1. A dual-magnet brushless DC motor is characterized in that: the permanent magnet motor comprises a stator and a rotor, wherein a plurality of groups of stator permanent magnet groups are uniformly distributed on the stator in the axial direction;

2. The dual-magnet brushless dc motor of claim 1, wherein: each group of stator permanent magnet groups consists of six permanent magnets which are uniformly fixed on the stator at 60 degrees in the circumferential direction.

3. The dual-magnet brushless dc motor of claim 1, wherein: each group of the rotor permanent magnet group consists of three permanent magnets which are uniformly fixed on the rotor at 120 degrees in the circumferential direction.

4. The dual-magnet brushless dc motor according to claim 1 or 3, wherein: the rotor permanent magnets on each group of the rotor permanent magnet groups are arranged in a staggered mode with a 15-degree difference.

5. The dual-magnet brushless dc motor according to claim 1 or 2, wherein: the number of the stator permanent magnet groups is at least 4.

6. The dual-magnet brushless dc motor of claim 5, wherein: the axial distance between each group of the stator permanent magnet groups is 6-7 cm.