阅读说明：本技术 一种无刷电动机 (Brushless motor ) 是由 潘绪龙 于 2020-07-27 设计创作，主要内容包括：本发明涉及一种无刷电动机,包括：定子、转子和至少一对线圈,所述定子套设在所述转子外,所述线圈缠绕在所述定子上,所述定子为软磁体,所述转子为强磁永磁体。本发明提供的无刷电动机克服了传统无刷电动机在转动过程中的周期性力矩波动,不需要额外的电流去平衡,可以用恒流电驱动,也可以用正弦波电流驱动,简化了无刷电动机的驱动要求,拓宽了无刷电动机的应用领域。(The present invention relates to a brushless motor, comprising: the stator is sleeved outside the rotor, the coil is wound on the stator, the stator is a soft magnet, and the rotor is a strong magnetic permanent magnet. The brushless motor provided by the invention overcomes the periodic torque fluctuation of the traditional brushless motor in the rotating process, does not need extra current for balancing, can be driven by constant current and sine wave current, simplifies the driving requirements of the brushless motor and widens the application field of the brushless motor.)

1. A brushless motor, comprising: stator (1), rotor (2) and at least a pair of coil (3), stator (1) cover is established outside rotor (2), coil (3) winding is in on stator (1), stator (1) is soft magnet, rotor (2) are strong magnetism permanent magnet.

2. The brushless motor according to claim 1, wherein the rotor (2) is disposed above the stator (1) or the rotor (2) is disposed below the stator (1).

3. The brushless motor according to claim 1, further comprising a rotating shaft (4) and a bearing (5), wherein the rotor (2) is sleeved on the rotating shaft (4), and the bearing (5) is sleeved on the rotating shaft (4).

4. The brushless motor according to claim 1, wherein the stator (1) is a transformer bead, and the transformer bead is made of PC40 material.

5. The brushless electric motor according to claim 1, wherein the single pair of coils (3) comprises a first portion and a second portion, the first portion being connected to one end of the second portion.

6. The brushless motor according to claim 5, wherein the first portion is wound around the stator (1), and the second portion winds the first portion around the stator (1) by 180 ° with the center of the stator (1) as an origin.

Technical Field

The invention relates to the technical field of brushless motors, in particular to a brushless motor.

Background

The brushless motor on the market is in the course of working, and rotor magnetic pole and stator magnetic pole are in the process of approaching and separating, the periodic production acceleration torque and deceleration torque, this very big servo drive control that has prevented the motor, and the brushless motor that uses three-phase sinusoidal alternating current to control can solve this problem, and the technology is complicated, and is with high costs.

Disclosure of Invention

The invention provides a brushless motor, which solves the problem that an accelerating torque and a decelerating torque are generated periodically in the process of approaching and separating a rotor magnetic pole and a stator magnetic pole.

In order to achieve the purpose, the invention provides the following technical scheme:

a brushless motor comprising: stator 1, rotor 2 and at least a pair of coil 3, stator 1 cover is established outside rotor 2, coil 3 twines on stator 1, stator 1 is soft magnet, rotor 2 is strong magnetism permanent magnet.

Preferably, the rotor 2 is disposed above the stator 1, or the rotor 2 is disposed below the stator 1.

Preferably, the rotor comprises a rotating shaft 4 and a bearing 5, wherein the rotating shaft 4 is sleeved with the rotor 2, and the rotating shaft 4 is sleeved with the bearing 5.

Preferably, the stator 1 is a transformer magnetic ring, and the transformer magnetic ring is made of PC40 material.

Preferably, the single pair of coils 3 includes a first portion and a second portion, and the first portion is connected to one end of the second portion.

Preferably, the first portion is wound around the stator 1, and the second portion winds the first portion around the stator 1 by 180 ° with the center of the stator 1 as an origin.

Through implementing above technical scheme, have following technological effect: the brushless motor provided by the invention overcomes the periodic torque fluctuation of the traditional brushless motor in the rotating process, does not need extra current for balancing, can be driven by constant current and sine wave current, simplifies the driving requirements of the brushless motor and widens the application field of the brushless motor.

Drawings

Fig. 1 is a schematic structural view (perspective view) of a brushless motor according to the present invention.

Detailed Description

In order to better understand the technical scheme of the invention, the following detailed description is made on the embodiments provided by the invention in combination with the accompanying drawings.

A brushless motor comprising: stator 1, rotor 2 and at least a pair of coil 3, stator 1 cover is established outside rotor 2, coil 3 twines on stator 1, stator 1 is soft magnet, rotor 2 is strong magnetism permanent magnet.

In this embodiment, the stator 1 is sleeved outside the rotor 2, the coil 3 is wound on the stator 1, the soft magnet is used as the stator 1, the soft magnet can be an iron-silicon alloy, an iron-aluminum alloy, or an iron-silicon-aluminum alloy, preferably, the soft magnet is a transformer magnetic ring made of PC40 material (ferrite power material), the strong magnetic permanent magnet is used as the rotor 2, and the rotor 2 is specifically a 2-pole radially magnetized rubidium-iron-boron strong magnet, so that the unique structure makes the rotor 2 hardly receive acceleration or deceleration acting force with the stator 1 during rotation without current, and interference of the acceleration or deceleration acting force is avoided, so that the brushless motor with the structure can be applied to a servo motor only by simple constant current driving without using a sine wave current driving with complicated technology, meanwhile, simple constant current driving enables the number of current sampling times of the coil 3 in each phase of the brushless motor in operation to be greatly reduced, so that the driving has higher driving speed than the existing motor on the premise of the same sampling frequency, the number of the coil 3 can be 2, 4, 6 and the like, the coil 3 is used for winding the stator 1, the stator 1 forms a space magnetic field capable of driving the rotor 2 to rotate, the coil 3 is used for greatly reducing the inductance of the brushless motor winding, so that the coil 3 can work at higher frequency, and the magnetic field generated by the coil 3 is distributed in a relatively large space, so that the rotor 2 can be placed inside the stator 1, and the rotor 2 can be placed above the stator 1 or below the stator 1, the use is more convenient.

On the basis of the above embodiment, in other embodiments, more specifically, the rotor further includes a rotating shaft 4 and a bearing 5, the rotor 2 is sleeved on the rotating shaft 4, and the bearing 5 is sleeved on the rotating shaft 4.

In this embodiment, 2 covers of rotor are established on the pivot 4 stator 1 and under the effect of coil 3, rotor 2 can wind pivot 4 rotates, 5 covers of bearing are established on the pivot 4, utilize bearing 5 is connected with the device that needs power drive.

On the basis of the foregoing embodiments, in other embodiments, more specifically, the single pair of coils 3 includes a first portion and a second portion, the first portion is connected to one end of the second portion, the first portion is wound on the stator 1, and the second portion winds the first portion on the stator 1 by rotating 180 ° with the center of the stator 1 as an origin.

In the present embodiment, each pair of the coils 3 includes a first portion and a second portion, the second portion is formed by rotating the first portion by 180 degrees with the center of the stator 1 as an origin, then the magnetic field is formed by winding the magnetic field on the stator 1, the first part and the second part have the same number of turns, the thick lines have the same number of turns, the directions are opposite, the positions are centrosymmetric, the magnetomotive force generated on the stator 1 by the first part and the second part after the power is on is equal, so that the magnetic moment along the direction of the stator 1 is neutralized, only the magnetic field outside the stator 1 is left, the magnetic field strength is weakened, but in the direction of the magnetic field that drives the rotor 2 in rotation, generating a magnetic field that enables the rotor to rotate, so that during rotation of the rotor 2, there is no force that would cause the rotor 2 to suddenly accelerate and decelerate, as in a conventional brushless motor.

While the brushless motor according to the embodiments of the present invention has been described in detail, those skilled in the art will appreciate that the various embodiments and applications of the brushless motor can be modified according to the spirit of the embodiments of the present invention.