TW201401725A - Corresponding structure of stator and rotor in a brush motor - Google Patents

Abstract

There is provided a corresponding structure of stator and rotor in a brush motor, comprising: a stator having a plurality of magnets, the plurality of magnets being arranged radially and spaced equally apart from each other, the number of the magnets being 2n, where n is an integer; and a rotor disposed at an outside of the stator, the rotor having a plurality of coil windings, the plurality of coil windings being arranged equidistantly in a circumferential direction, the number of the coil windings being 2n+1, where n is an integer, so that a deviation angle is formed between the plurality of coil windings and the plurality of magnets on the stator, thereby forming a phase difference between the positive and negative electrodes.

Description

Corresponding structure of stator and rotor of brush motor

The invention relates to a corresponding structure of a stator and a rotor of a brush motor, in particular to a deflection angle formed by the coil winding group of the rotor and the number of magnets of the stator, and further forming a between the positive pole and the negative pole. The phase difference is used to increase the efficiency of the motor.

According to the motor, the motor has been widely used as a power source, so the efficiency of the motor has also become a major improvement direction.

Generally speaking, the motor can be mainly divided into a brush motor and a brushless motor. The brush motor uses a conductive brush fixed on the back cover of the motor to introduce the positive and negative poles of the power source to the commutator of the rotor, and the phase changer The coil on the rotor is connected to make the coil magnetically to form a force with the magnet fixed to the stator to rotate the rotor. The brushless motor is mainly composed of a rotor provided with a magnet and a stator wound with a coil, and the magnetic force generated by the coil of the power supply to the stator forms a force with the magnet on the rotor, thereby driving the rotor to rotate.

The structure of the existing brush motor mainly includes a stator, a rotor, a plurality of carbon brushes and a plurality of coil sets. The stator includes a housing and a plurality of permanent magnets disposed on the housing. The rotor comprises a rotating shaft, a set of silicon steel sheets sleeved on the rotating shaft, and a commutator fixed to one end of the rotating shaft and electrically connected to each coil group. The plurality of carbon brushes are disposed on the corresponding plurality of carbon brush holders. A plurality of coil sets are wound around the silicon steel sheet set.

In order to avoid the permanent magnet of the stator unit exerting a force on the coil of the rotor unit, the coil greatly changes the distance and angle of the magnetic force with the rotation of the rotor unit, causing a significant change in the force of the rotor, so the permanent magnets disposed in the stator unit are Carbon brushes are even pairs, such as four groups, or even six groups, eight groups.

As for the rotor unit, the number of wound coils can correspond to and interact with the even number of permanent magnets disposed on the stator, and all of them are one-to-one correspondence. The number of wound coils on the rotor is the same as the number of magnets on the stator.

However, this conventional motor still has doubts about its inefficiency. In order to achieve the goal of high motor efficiency, the conventional technology uses a magnet with a high magnetic energy product, for example, a so-called rare earth magnet to replace the existing ferrite magnet; and because the magnetic energy product of the rare earth magnet is high, The thickness of the motor-guided magnet housing is increased to provide an appropriate area for passage of magnetic lines of force. If the magnetic conductive area is to be increased, the shape of the magnetic conductive outer casing needs to be expanded outward, causing the motor to become bulky. This method is unpopular because of the increase in volume and cost.

Therefore, based on the structural space type or the number of components to make different improvements, the period can be quite different from the existing structure or improve the use efficiency or reduce the cost to increase competitiveness, so there is a need for a brush motor. The corresponding structure of the stator and the rotor solves the above problem.

The main object of the present invention is to provide a brush motor structure with high efficiency and high torque to improve the lack of the prior art.

In order to achieve the above object, the present invention provides a corresponding structure of a stator and a rotor of a brush motor, comprising: a stator comprising a disk body, wherein the disk body is provided with a plurality of magnets and a plurality of carbon brushes corresponding to the magnets, the plurality The magnets are arranged in a radial shape and equally spaced from each other, the number of the magnets and the carbon brushes being 2n, n being an integer; and a rotor disposed on an outer side of the stator, comprising a disk body, the disk body being provided a plurality of coil winding groups and a plurality of commutators corresponding to the coil winding group, wherein the commutator is in contact with the carbon brush, and the plurality of coil winding groups are equidistant in a circumferential direction Arrangement, the number of coil winding groups and commutators is 2n+1, n is an integer, so that a plurality of coil winding groups and a plurality of magnets on the stator form a misalignment angle, and then in the positive pole thereof A phase difference is formed between the negative electrodes.

In addition, each coil winding group is wound in the same direction, and the opposite ends of the two adjacent coil winding groups are arranged in an upper and lower overlapping manner.

In order to make the present invention more clear and detailed, the preferred embodiment and the following drawings are used to describe the structure and technical features of the present invention as follows: Please refer to FIG. 1 to FIG. 3, which is an embodiment of the present invention. The schematic structure diagram, the three-dimensional combination diagram and the planar structure diagram of the rotor. The corresponding structure of the stator and the rotor of the brush motor according to the present invention comprises a stator 10, a rotor 20 and a rotating shaft 30; wherein the stator 10 and the rotor 20 are the same rotating shaft 30.

The stator 10 includes a disk body 11. The disk body 11 is provided with a plurality of magnets 12 and a plurality of carbon brushes 13 corresponding to the magnets 12. The plurality of magnets 12 are arranged in a radial shape and equally spaced from each other. The number of 12 and carbon brushes 13 is 2n, and n is an integer.

The rotor 20 is disposed on an outer side of the stator 10 and is arranged in parallel with the stator 10. The rotor 20 includes a disk body 21, and the disk body 21 is provided with a plurality of coil winding groups 22 and a plurality of corresponding ones. The commutator 23 of the coil winding group 22, the commutator 23 is in contact with the carbon brush 13 on the stator 10, and the plurality of coil winding groups 22 are equidistantly arranged in a circumferential direction, and the coil winding group 22 and the number of commutators 23 are 2n+1, n is an integer, so that a plurality of coil winding groups 22 and a plurality of magnets 12 on the stator 10 form a misalignment angle, and further in the positive and negative poles thereof. A phase difference is formed between them.

Since the plurality of magnets 12 in the stator 10 are not arranged in a one-to-one correspondence with the plurality of coil winding groups 22 in the rotor 20, a bias is formed between the plurality of magnets 12 and the plurality of coil winding groups 22. The position angle not only reduces the rotational resistance, but also improves the overall performance and output power of the motor. The corresponding structure of the magnet 12 and the coil winding group 22 in the present invention is actually tested and compared with the conventional one-to-one corresponding structure, and the efficiency is further improved, although the efficiency of the lifting is not very large, but In this field of technology, even a small improvement in efficiency can be called a significant improvement.

In addition, the stator 10 and the rotor 20 can also be combined into a module, and And a plurality of modules can be disposed on the rotating shaft 30 at intervals from each other (as shown in FIG. 5), thereby improving usability and improving market competitiveness.

Referring to FIG. 3 and FIG. 4, each coil winding group 22 is wound in the same direction, and the opposite ends of two adjacent coil winding groups 22 are arranged in an upper and lower overlapping manner to increase the magnetic area. Therefore, the coil winding 22 has a first end 221 and a second end 222. The first end 221 and the second end 222 form a height. The poor bent portion 223 is such that the first end 221 and the second end 222 of one of the coil winding groups 22 are respectively connected to the second end 222 of an adjacent coil winding group 22, and another adjacent coil The first end 221 of the winding set 22 overlaps up and down.

In addition, the commutator 23 is generally designed as a single layer structure in combination with a single phase, and can also be designed with a multi-phase structure, such as a two-layer structure in two phases and a three-layer structure in three phases; the commutator 23 can be made of a copper sheet and can be combined with a multi-phase number to be arranged in a multi-layer structure from top to bottom.

It can be seen from the above description that the present invention has at least the following advantages and effects, and is far more advanced than the prior art, and has substantial industrial utilization value.

1. It is known that the number of the permanent magnets on the stator and the wound coils on the rotor are one-to-one correspondence, so that the operational efficiency produced is good but cannot be improved; the number of magnets 12 in the stator 10 of the present invention is 2n, n is an integer, and the number of coil winding groups 22 in the rotor 20 is 2n+1, so that a plurality of magnets 12 and the plurality of coil winding groups 22 form a misalignment angle to reduce the rotational resistance. And can improve the efficiency of the motor.

2. The two adjacent coil winding groups 22 on the rotor 20 are arranged in an up-and-down manner at their corresponding end portions 221 to increase the magnetic area, thereby improving the torque and improving the efficiency of the motor.

The plurality of magnets 12 on the disk body 11 of the stator 10 of the present invention may be composed of electromagnetism or permanent magnets. Although the permanent magnet used in the present invention is not particularly limited, it is preferable to have a high-performance rare earth magnet containing a rare earth element. Rare earth bonded magnet composed of so-called rare earth metal compound Or rare earth sintered magnets are the best, but even better are Nd-based rare earth anisotropic sintered magnets. They are best because of their high-energy products and a large electromagnetic field, because they improve power generation performance and are inexpensive from the point of view of magnet cost.

The above is only the preferred embodiments of the present invention, and is intended to be illustrative, and not restrictive, and it is understood by those of ordinary skill in the art that Many changes, modifications, and even equivalents may be made without departing from the scope of the invention.

10‧‧‧ Stator

11‧‧‧ dish

12‧‧‧ magnet

13‧‧‧Carbon brush

20‧‧‧Rotor

21‧‧‧ dish

22‧‧‧Coil winding group

221‧‧‧ first end

222‧‧‧ second end

223‧‧‧Bending

23‧‧‧ commutator

30‧‧‧ shaft

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of an embodiment of the present invention.

2 is a schematic perspective view of a combination of embodiments of the present invention.

Figure 3 is a schematic plan view showing the structure of the rotor of the present invention.

Figure 4 is a longitudinal plan view showing the continuation of Figure 3 and illustrating the arrangement of the coil windings in a stack.

Figure 5 is a schematic perspective view of another embodiment of the present invention.

10‧‧‧ Stator

11‧‧‧ dish

12‧‧‧ magnet

13‧‧‧Carbon brush

20‧‧‧Rotor

21‧‧‧ dish

22‧‧‧Coil winding group

23‧‧‧ commutator

Claims (7)

A corresponding structure of a stator and a rotor of a brush motor, comprising: a stator comprising a disk body, wherein the disk body is provided with a plurality of magnets and a plurality of carbon brushes corresponding to the magnets, the plurality of magnets being radiated and equal to each other Arranged spaced apart, the magnet and the carbon brush are 2n, n is an integer; and a rotor is disposed on an outer side of the stator, the rotor includes a disk body, and the disk body is provided with a plurality of coils a wire group and a plurality of commutators corresponding to the coil winding group, the commutator is in contact with the carbon brush, the plurality of coil winding groups are arranged equidistantly in a circumferential direction, the coil winding group and the commutation The number of the devices is 2n+1, and n is an integer, so that a declination angle is formed between the plurality of coil winding groups and the plurality of magnets on the stator, and a phase difference is formed between the positive electrode and the negative electrode. A corresponding structure of a stator and a rotor of a brush motor according to claim 1, wherein each coil winding group is wound in the same direction. The corresponding structure of the stator and the rotor of the brush motor according to claim 1, wherein the stator and the rotor are further combined into a module, and the plurality of modules can be disposed at a distance from each other on a rotating shaft. The corresponding structure of the stator and the rotor of the brush motor according to claim 1, wherein the stator and the rotor are spaced apart on a rotating shaft and arranged in parallel. The corresponding structure of the stator and the rotor of the brush motor according to claim 1, wherein the opposite ends of the two adjacent coil winding groups of the plurality of coil winding groups are arranged above and below. A corresponding structure of a stator and a rotor of a brush motor according to claim 1, wherein the commutator is made of a copper sheet and arranged in a plurality of layers from top to bottom. The corresponding structure of the stator and the rotor of the brush motor according to claim 1, wherein the coil winding group has a first end and a second end, and the first end and the second end form a height difference. Bend section.