CN210297372U

CN210297372U - Novel motor rotor structure

Info

Publication number: CN210297372U
Application number: CN201921180122.8U
Authority: CN
Inventors: 刘文光; 刘浩伟; 陈步高; 陈永红; 曹福顺; 张栋梁
Original assignee: YANCHENG BUGAO AUTOMOBILE FITTINGS MANUFACTURE CO Ltd
Current assignee: YANCHENG BUGAO AUTOMOBILE FITTINGS MANUFACTURE CO Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-10
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a novel electric motor rotor structure uses on the birotor motor, and the permanent magnet has been arranged to the inboard of outside iron core, and the permanent magnet all separately arranges in proper order, and in order to reduce the magnetic interference between the adjacent magnetic pole, we open a trapezoidal hole on the iron core of every magnetic pole top, and in the same way, also set up trapezoidal hole in corresponding position, these trapezoidal holes respectively with oneself corresponding magnetic pole between fluting again, put into the magnetizer in the groove. In addition, when the magnetic poles are arranged, the magnetic separation sheets are inserted into gaps among the magnetic poles, so that the mutual interference is reduced again, and the power density and the working efficiency of the permanent magnet motor are improved.

Description

Novel motor rotor structure

Technical Field

The invention belongs to the field of motors, and particularly relates to a novel motor rotor structure.

Background

The common permanent magnet motor mainly comprises a stator and a rotor, wherein the rotor comprises a rotor core and a permanent magnet, and the permanent magnet is arranged in a magnetic steel groove of the rotor core; the stator includes a core and an energized armature.

In order to improve the motor efficiency, a double-excitation source motor is produced, and the double-rotor motor is the latter double-rotor motor. At present, a common double-rotor motor in the market is mostly in a TORUS type and consists of a stator and two rotors; however, the double-rotor motor has many problems because the magnetic field is disturbed by the multiple excitation sources inside the double-rotor motor, which greatly reduces the working efficiency of the motor and needs improvement.

Disclosure of Invention

In order to solve the problems, the invention discloses a novel motor rotor structure which can effectively comb the magnetic field in a motor, reduce the mutual interference and improve the power density and the working efficiency of a permanent magnet motor.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a novel motor rotor structure, includes the casing, the external rotor, the stator armature, the inner rotor includes three permanent magnet of group one of inner rotor iron core and inner rotor iron core outer wall, the external rotor includes three permanent magnet of group two of external rotor iron core and external rotor iron core inner wall, leave the draw-in groove between the magnetic pole of permanent magnet one, permanent magnet two, draw-in groove department installation magnetic-insulated piece, the stator armature sets up between external rotor and inner rotor, external rotor, stator armature, inner rotor setting are in the casing, set up trapezoidal hole on external rotor iron core, the external rotor iron core, set up trapezoidal block on the magnetic pole back of permanent magnet one, permanent magnet two with the supporting setting in trapezoidal hole.

As an improvement of the invention, three groups of first permanent magnets are embedded on the outer wall of the inner rotor iron core, the three groups of first permanent magnets comprise 6 magnetic poles, the 6 magnetic poles are symmetrically arranged, N and S levels are alternately arranged, each group of magnetic poles is 120 degrees on the circumference, and the single magnetic pole is 60 degrees.

As an improvement of the invention, three groups of second permanent magnets are embedded on the outer wall of the outer rotor iron core, the three groups of second permanent magnets comprise 6 magnetic poles, the 6 magnetic poles are symmetrically arranged, N and S levels are alternately arranged, each group of magnetic poles is 120 degrees on the circumference, and the single magnetic pole is 60 degrees.

As a modification of the invention, the trapezoidal hole is coincident with the center line of the magnetic pole.

As an improvement of the invention, a ventilation groove is arranged between the trapezoidal hole and the magnetic pole, and a magnetic conduction sheet is arranged in the ventilation groove.

As an improvement of the invention, the trapezoidal holes are symmetrically distributed.

The invention has the beneficial effects that:

according to the novel motor rotor structure, the rotor structure mode is changed, the magnetic field in the motor can be effectively combed, the mutual interference is reduced, and the power density and the working efficiency of the permanent magnet motor are improved.

Drawings

Fig. 1 is a cross-sectional view of a motor of the present invention.

Fig. 2 is a schematic view of an inner rotor according to the present invention.

Fig. 3 is a schematic view of the outer rotor of the present invention.

Fig. 4 is a schematic view of a stator armature according to the present invention.

Fig. 5 is a schematic view of the connection between the inner rotor core and the permanent magnet according to the present invention.

Fig. 6 is a schematic diagram of the connection between the outer rotor core and the permanent magnet according to the invention.

FIG. 7 is a schematic view of the magnetic shield according to the present invention.

List of reference numerals:

the permanent magnet motor comprises a winding 1, a permanent magnet 2, an outer rotor 3, a stator armature 4, an inner rotor 5, an outer rotor trapezoidal hole 101, an outer rotor ventilation groove 102, an outer rotor magnetic pole-S level 103, an outer rotor magnetism isolating piece 104, an outer rotor magnetic pole-N level 105, an inner rotor ventilation groove 110, an inner rotor trapezoidal hole 111, an inner rotor magnetic pole-S level 112, an inner rotor magnetism isolating piece 113 and an inner rotor magnetic pole-N level 114.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in the figure, the novel motor rotor structure is applied to a double-rotor motor, the structure is changed, the permanent magnet replaces the traditional copper wire turn, the permanent magnets are arranged on the inner side of an outer rotor iron core and the outer side of an inner rotor, the permanent magnets are sequentially and separately arranged, in order to reduce the magnetic interference between adjacent magnetic poles, a trapezoidal hole is formed in the iron core above different magnetic poles, the magnetic field inside the motor can be effectively combed, the mutual interference is reduced, and the power density and the output efficiency of the permanent magnet motor are improved.

The invention relates to a novel motor rotor structure which mainly comprises a shell, an outer rotor, a stator armature and an inner rotor.

The inner rotor is composed of an inner rotor iron core and three groups of permanent magnet blocks I, and the outer rotor is composed of an outer rotor iron core and three groups of permanent magnets II.

In order to realize better magnetic regulation performance in a permanent magnet motor and improve the efficiency of the motor, the method is realized by the following scheme:

the outer rotor core is provided with trapezoidal holes, and the number of the trapezoidal holes 101 corresponds to the number of the magnetic poles on the inner side of the rotor one by one. In order to exert the effect of the trapezoidal hole to the maximum extent, the position of the trapezoidal hole is at the position which is lower than the center of the whole iron core; the position of the trapezoidal hole is superposed with the central line of the magnetic pole. Similarly, the back of the outer side of the inner rotor is also provided with an inner rotor trapezoidal hole 111, and the back of the magnetic pole of the first permanent magnet is provided with a trapezoidal block matched with the trapezoidal hole.

Taking the outer rotor as an example: the inner side of the outer rotor iron core is embedded with 6 magnetic poles, N and S levels are arranged alternately, the whole arrangement is symmetrical, one group of magnetic poles is 120 degrees on the circumference, the single magnetic pole is 60 degrees, and the magnetic poles are also symmetrically distributed corresponding to the trapezoidal holes; the whole motor is just fully distributed for a circle, three groups of 6 magnetic poles are arranged on the inner side of the outer rotor, three groups of 6 magnetic poles are also arranged on the outer side of the inner rotor, and the running time and power of the motor can be respectively improved by about 3-5% and 7-8% relative to 2 or 4 groups of magnetic poles.

The invention leaves a slot between the magnetic poles for installing the magnetism isolating sheet 104 (or 113). Because the magnetic fields generated between the adjacent magnetic poles can interfere with each other, the magnetic shielding sheets are arranged at the clamping grooves and used for reducing the mutual interference.

Because of the size difference of the inner rotor and the outer rotor, the size of the outer rotor magnetism-isolating sheet 104 is different from that of the inner rotor magnetism-isolating sheet 113, the magnetism-isolating sheet with proper size is placed on the inner rotor and the outer rotor, the placing of the magnetism-isolating sheet can not be protruded out of the magnetic pole theoretically, and the air gap can be influenced if the magnetism-isolating sheet is not placed on the side, which is not beneficial to the improvement of the operation efficiency of the.

In addition, the ventilation groove 102 is formed between the trapezoidal hole and the magnetic pole and can be communicated with the trapezoidal hole and the magnetic pole, and some magnetic conductive sheets can be selectively arranged in the ventilation groove 102, so that S, N magnetic poles can be magnetized. The ventilation slots 102 are arranged to better exert the function of the trapezoidal holes, and can help the trapezoidal holes better comb magnetic lines and improve the overall power density of the permanent magnet motor.

The arrangement of the trapezoidal holes, the ventilation grooves and the magnetism isolating sheets on the inner rotor is similar to that of the outer rotor and is arranged according to the same principle and position.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.

Claims

1. The utility model provides a novel electric motor rotor structure, includes casing, external rotor, stator armature, inner rotor, its characterized in that: the inner rotor comprises an inner rotor core and three groups of first permanent magnets on the outer wall of the inner rotor core, the outer rotor comprises three groups of second permanent magnets on the inner wall of the outer rotor core and the inner wall of the outer rotor core, clamping grooves are reserved between the magnetic poles of the first permanent magnets and the second permanent magnets, magnetic isolation sheets are installed at the clamping grooves, the stator armature is arranged between the outer rotor and the inner rotor, the outer rotor, the stator armature and the inner rotor are arranged in a casing, trapezoidal holes are formed in the outer rotor core and the outer rotor core, and trapezoidal blocks are arranged on the back faces of the magnetic poles of the first permanent magnets and the second permanent magnets.

2. The novel motor rotor structure of claim 1, wherein: three groups of first permanent magnets are embedded in the outer wall of the inner rotor iron core, the three groups of first permanent magnets comprise 6 magnetic poles, the 6 magnetic poles are symmetrically arranged, N and S levels are arranged alternately, each group of magnetic poles is 120 degrees on the circumference, and the single magnetic pole is 60 degrees.

3. The novel motor rotor structure of claim 1, wherein: the outer rotor iron core outer wall inlays three groups of permanent magnet two, and three groups of permanent magnet two include 6 magnetic poles, 6 magnetic poles symmetrical arrangement, N, S level alternate arrangement, every group magnetic pole is 120 on the circumference, and single magnetic pole is 60.

4. The novel motor rotor structure of claim 1, wherein: the position of the trapezoidal hole is superposed with the central line of the magnetic pole.

5. The novel motor rotor structure of claim 1, wherein: be equipped with the ventilation groove between trapezoidal hole and the magnetic pole, be equipped with the magnetic conduction piece in the ventilation groove.

6. The novel motor rotor structure of claim 1, wherein: the trapezoidal holes are symmetrically distributed.