WO2019022448A1

WO2019022448A1 - Bldc motor using nanomaterial-based polymer compound

Info

Publication number: WO2019022448A1
Application number: PCT/KR2018/008262
Authority: WO
Inventors: 신동수; 이재원
Original assignee: 주식회사 에스플러스컴텍
Priority date: 2017-07-27
Filing date: 2018-07-23
Publication date: 2019-01-31
Also published as: JP2020529186A; DE112018003813T5; CN110915102B; CN110915102A; KR101862214B1

Abstract

Provided according to the present invention is a BLDC motor comprising: a stator including a stator core and a stator winding coil; and a rotor including a body part and a plurality of magnets coupled to the body part and rotating with respect to the stator, wherein the stator core comprises: a yoke part; and a plurality of stator coil winding parts protruding from the yoke part and having the stator winding coil wound thereon, and is made of a composite material of a conductive nanomaterial-based polymer compound.

Description

BLDC motor using nanomaterial-based polymer compound

The present invention relates to a BLDC motor using a nanocomposite polymeric compound, and more particularly, to a BLDC motor using a nanocomposite polymer compound that can be formed into a lightweight slim shape by reducing weight and improving the performance and efficiency of a motor. will be.

Generally, a motor is a device that obtains rotational force by converting electrical energy into mechanical energy, and is widely used not only for home electronic products but also for industrial devices.

Among these various types of motors, a brushless DC motor is a DC motor using a rectifier circuit composed of a switching element instead of a mechanical element such as a brush and a commutator. It does not require replacement of a brush due to abrasion, . In such a BLDC motor, an armature winding is provided on a rotor, a stator, and a Hall sensor (Hall sensor) and a photodiode are used to determine the current direction of the winding, Unlike conventional induction motors or AC motors that use 3-phase or 4-phase inverters to change the direction of current, they can be easily changed from internal drives, have relatively high torque at high speed and high speed, and can rotate at high speed And the current of the coil can be driven by a non-contact semiconductor device, so that the lifetime of the coil is very long, and noise and electronic noises are hardly generated, and the speed control can be directly performed in the motor drive circuit itself . In particular, BLDC motors have been developed in various forms in recent years as reliability of hall sensors has been improved.

However, in the conventional BLDC motor, since most of the components including the stator portion and the housing are made of a metal material, it is difficult to manufacture an ultra-light slim type motor because of its heavy weight. Due to the inertia effect due to high weight, And the efficiency is lowered.

An object of the present invention is to provide a BLDC motor using a nanocomposite polymer compound capable of reducing the weight to achieve an ultra lightweight slim type motor and reducing weight to reduce the inertia effect and improve the performance and efficiency of the motor.

According to an aspect of the present invention, there is provided a stator comprising: a stator core and a stator winding coil; And a rotor having a plurality of magnets coupled to the body portion and rotating with respect to the stator, wherein the stator core includes a yoke portion, a yoke portion protruded from the yoke portion and wound around the stator winding coil The stator core includes a plurality of stator coil windings, and the stator core is provided with a BLDC motor comprising a composite material of a polymer compound based on a conductive nanomaterial.

The BLDC motor using the nanocomponent-based polymer compound according to the present invention provides the following effects.

First, it is possible to manufacture an ultra-light slim type motor by reducing the weight. By reducing the weight, it is possible to reduce the inertia effect and improve the performance and efficiency of the motor due to the reduction of the caulking.

Secondly, the heat generated from the stator and the rotor can be effectively dissipated through the housing having the heat-radiating film layer formed on the aluminum material having a wider surface area without a separate heat dissipating means such as a heat radiating fin, and the deterioration of the motor performance due to heat generation can be prevented In addition, the weight can be reduced.

Third, it is a lightweight slim type high efficiency motor and can be formed into a lightweight slim type which can be applied to a robot or an electric vehicle to improve electric efficiency and motor efficiency.

1 is an exploded perspective view illustrating a BLDC motor using a nanocomponent-based polymer compound according to an embodiment of the present invention.

FIG. 2 is a plan view showing a stator and a rotor in the BLDC motor of FIG. 1, wherein the stator winding coil and the compensation winding coil are omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a BLDC motor (hereinafter referred to as "BLDC motor") using a nanoclay-based polymer compound according to an embodiment of the present invention as an exploded perspective view. Referring to FIG. 1, the BLDC motor 100a includes a housing 100, a stator 200 accommodated in the housing 100 to be fixed therein, and a stator 200 disposed inside the housing 100, A rotor 300 accommodated to rotate about a rotation axis X and a sensor module 400 for sensing the position of the rotor 300. The BLDC motor 100a shown in FIG. 1 is an inner rotor type in which the rotor 300 is located inside the stator 200.

The housing 100 is cylindrical in shape around the axis of rotation X and provides a housing space 101 in which the stator 200 and the rotor 300 are accommodated. The housing 100 includes a first case 110 and a second case 120 positioned along the direction of the axis of rotation X. [ The two

cases

110 and 120 are combined to form a receiving space 101. The first case 110 is formed with a first through hole 102 located on the center axis X and the second case 120 is provided with a second through hole 103 located on the center axis X, . In the second case 120, a sensor module 400 is installed.

The housing 100 is preferably made of an aluminum material having a large surface area. However, as one of the embodiments for reducing the weight and improving the heat radiation effect, other metals or non-metals other than aluminum may be used as the material of the housing 100, which is also within the scope of the present invention.

It is preferable that a heat radiation film layer is formed on the surface of the housing 100 in order to maximize the radiation effect. The heat-radiating film layer may be formed by vapor-depositing a mixture of graphite and aluminum (Al) or by vapor-depositing a mixture of graphite and copper (Cu) so that the heat-radiating film layer not only improves the heat radiation effect but also the durability . The heat radiation film layer is preferably formed to a thickness of 200 占 퐉 or less. Accordingly, the housing 100 can effectively dissipate heat generated from the stator 200 and the rotor 300 without a separate heat dissipating means such as a radiating fin.

The stator 200 is accommodated in a receiving space 101 formed inside the housing 100 and is fixed so as not to rotate with respect to the housing 100. In FIG. 2, the stator 200 and the rotor 300 are shown in plan view. 1 and 2, the stator 200 includes a stator core 210, a stator winding coil 220 wound around the stator core 210, a compensation winding coil 510 wound around the stator core 210, ). Inside the stator 200, the rotor 300 is arranged to rotate about the axis of rotation X with respect to the stator 200.

The stator core 210 includes a ring-shaped yoke 211, a plurality of stator teeth 215 protruding from the yoke 211, and a plurality of compensating coils 215 protruding from the yoke 211, And a winding portion 218. The material of the stator core 210 is a polymer compound based on a conductive nanomaterial, and is a composite material including a conductive nanomaterial and a resin. The conductive nanomaterial used in the stator core 210 in the present embodiment is described as including one or more selected from carbon black, carbon nanotubes, graphene, and graphite. However, the present invention is not limited thereto, Conductive nanotubes, conductive nanoparticles, and conductive nanofibers, all of which are also within the scope of the present invention. In this embodiment, the resin used for the stator core 210 is a phenolic resin, but the present invention is not limited thereto.

The yoke portion 211 has a ring shape centering on the axis of rotation X and a plurality of stator teeth 215 and a plurality of compensating coil winding portions 218 are located on the inner circumferential surface of the yoke portion 211.

The plurality of stator tooth portions 215 are equally spaced along the circumferential direction on the inner circumferential surface of the yoke portion 211. In the present embodiment, four stator teeth 215 are described, but the present invention is not limited thereto. Each of the plurality of stator tooth portions 215 includes a stator coil winding portion 216 protruding from the inner circumferential surface of the yoke portion 211 and extending radially inward toward the rotation axis X, And an inner yoke 217 formed at an end thereof.

The stator coil winding portion 216 protrudes from the inner circumferential surface of the yoke portion 211 toward the rotation axis X and extends radially inward. The stator winding coil 220 is wound around the stator coil winding portion 216.

The inner yoke 217 is located at the inner end of the stator coil winding portion 216 and extends from the stator coil winding portion 216 in both circumferential directions.

The plurality of compensating coil winding units 218 are located at equal angular intervals on the inner circumferential surface of the yoke 211 and each of the plurality of compensating coil winding units 218 is disposed between two neighboring stator teeth 215. In the present embodiment, four compensating coil winding units 218 are used. However, the present invention is not limited to this, and may be changed corresponding to the number of stator teeth 215. The compensation coil winding portion 218 protrudes from the inner circumferential surface of the yoke portion 211 and extends radially inward toward the rotation axis X. [ The compensating winding coils 510 are wound on each of the plurality of compensating coil winding portions 218.

The stator winding coil 220 is wound on the coil winding portion 216 of each of the plurality of stator tooth portions 215. The stator winding coil 220 is made of a composite material of a polymer compound based on a conductive nanomaterial. More specifically, the stator winding coil 220 forms an electrical network of a conductive nanomaterial inside a matrix (matrix) made of a flexible electrically insulating resin material. The conductive nanomaterial used for the stator winding coil 220 may be a conductive nanofiber such as graphite, carbon fiber, graphene fiber, or carbon nanotube (CNT) fiber.

The compensating winding coils 510 are wound on each of the plurality of compensating coil winding portions 218. The compensation winding coil 510 is made of a composite material of a polymer compound based on a conductive nanomaterial. More specifically, the compensation winding coil 510 forms an electrical network of a conductive nanomaterial inside a matrix (matrix) made of a flexible electrically insulating resin material. The conductive nanomaterial used for the compensation winding coil 510 may be a conductive nanofiber such as graphite, carbon fiber, graphene fiber, or carbon nanofiber. The compensation winding coil 510 may be wound with a certain angle set according to the compensation type.

The rotor 300 is located inside the stator 200 and rotates about the axis of rotation X with respect to the stator 200. The rotor 300 includes a disk-shaped body 310 centered about the axis of rotation X and a central axis 310 extending along the axis of rotation X and passing through the center of the body 310, And a plurality of magnets 330 coupled to the outer circumferential surface of the body 310 at regular intervals along the circumferential direction.

The body portion 310 and the rotating shaft 320 are formed of a mixture of glass fiber reinforced plastics (GFRP) or carbon fiber reinforced plastics (CFRP) and a metal so as to reduce the weight and increase the stiffness. The body portion 310 and the rotating shaft 320 may be manufactured by a drawing method, or may be manufactured into a hollow shape by a sheet rolling method or a filament winding method. In the present embodiment, the body 310 and the rotating shaft 320 are made of a mixture of GFRP or CFRP and metal. Alternatively, the body 310 and the rotating shaft 320 may be made of a fiber-reinforced plastic composite material such as GFRP or CFRP, . &Lt; / RTI >

The magnet 330 may be formed of any one of Nd-Fe-B Neodymium or Samarium cobalt or Ferrite or Al-Ni-Co magnets or rubber magnets or bonded magnets .

The sensor module 400 senses the magnetic force of the mark net 330 to sense the position of the rotor 300 and transmits the signal to the rectifying circuit.

The sensor module 400 includes a hall sensor 410 installed inside the second case 120 to sense the position of the rotor 300 and a hall sensor 410 coupled to protect the hall sensor 410 And a hole sensor cover 420 connected to the housing 100.

The hole sensor cover 420 is preferably made of a mixture of a glass fiber made of a light and insulator and a resin of a PA6 series in order to reduce weight, but is not limited thereto.

The sensor module 400 may include a resolver or an encoder in addition to the hall sensor 410 to detect the position of the rotor 300 in a precise manner corresponding to the ultra lightweight slim type. Here, although the sensor module 400 has been described in the case of applying the hall sensor 410 and the resolver and encoder, it goes without saying that various other configurations can be applied as long as the above-described objects can be achieved.

Although the present invention has been described with reference to the case of the inner rotor type in which the rotor of the BLDC motor is located inside the stator, the present invention is equally applicable to the outer rotor type BLDC motor in which the stator is located inside the rotor And this is also within the scope of the present invention.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims

A stator having a stator core and a stator winding coil; And

A rotor having a body and a plurality of magnets coupled to the body, the rotor rotating relative to the stator,

The stator core includes a yoke portion and a plurality of stator coil windings protruding from the yoke portion and wound around the stator winding coil,

Wherein the stator coil winding portion is made of a composite material of a polymer compound based on a conductive nano material.
The method according to claim 1,

Wherein the conductive nanomaterial comprises one or more selected from carbon black, carbon nanotubes, graphene, and graphite.
The method according to claim 1,

The stator winding coil is a composite material of a polymer compound based on a conductive nanomaterial.
The method of claim 3,

The conductive nanomaterial is a conductive nanofiber BLDC motor.
The method of claim 4,

Wherein the conductive nanofiber is graphite, carbon fiber, graphene fiber, or carbon nanotube fiber.
The method according to claim 1,

Wherein the body is formed of a mixture of glass fiber reinforced plastics (GFRP) or carbon fiber reinforced plastics (CFRP) and a metal.
The method according to claim 1,

Further comprising a housing for providing a housing space in which the stator and the rotor are accommodated,

Wherein the housing has a heat radiation film layer formed on the surface of the aluminum material.
The method of claim 7,

The heat dissipation film layer is formed by depositing a mixture of graphite and aluminum.
The method of claim 7,

Wherein the heat radiation film layer is formed by depositing a mixture of graphite and copper.
The method according to claim 1,

And a resolver or an encoder for sensing the position of the rotor.
The method according to claim 1,

A Hall sensor for sensing the magnetic force of the magnet to sense the position of the rotor, and a Hall sensor cover to which the Hall sensor is coupled.
The method of claim 11,

Wherein the hole sensor cover is formed of a mixture of glass fiber and resin.
A cylindrical housing having a housing space therein;

A stator having a stator core and a stator winding coil, the stator being accommodated in the accommodating space and fixed in position; And

And a rotor rotatably installed inside the stator,

The stator core includes a yoke portion and a plurality of stator coil windings protruding from the yoke portion and wound around the stator winding coil,

Each of the plurality of stator coil windings is made of a compound or a polymer compound based on a conductive nano material,

Wherein the rotor has a body portion that is disposed on a center axis of the accommodation space and that is axially rotated and a plurality of magnets that are arranged at equal intervals along a circumferential direction on an outer circumferential surface of the body portion,

Wherein the conductive nanomaterial comprises one or more selected from carbon black, graphene, carbon nanotube, carbon, carbon fiber and graphite,

Wherein the body is formed of a mixture of glass fiber reinforced plastics (GFRP) or carbon fiber reinforced plastics (CFRP) and a metal.
14. The method of claim 13,

The stator winding coil is made of a composite material of a polymer compound based on a conductive nano material,

The stator core includes a yoke portion and a plurality of stator coil windings protruding from the yoke portion and wound around the stator winding coil,

Wherein the yoke portion and the stator coil winding portion are made of a composite material of a polymer compound based on a conductive nanomaterial.