CN109391058B

CN109391058B - Pluggable composite disc type permanent magnet brushless motor structure

Info

Publication number: CN109391058B
Application number: CN201811187805.6A
Authority: CN
Inventors: 孙长乐; 文枫; 熊伟; 王海涛; 关广丰; 马文琦
Original assignee: Dalian Maritime University
Current assignee: Dalian Maritime University
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2020-11-27
Anticipated expiration: 2038-10-11
Also published as: CN109391058A

Abstract

The invention provides a plug-in composite disc type permanent magnet brushless motor structure, which comprises: the device comprises an I-shaped main shaft, a bearing, a permanent magnet turntable, a winding turntable, a positioning shaft sleeve and an outer shell; the winding rotary table and the I-shaped main shaft are matched through a special shape to ensure tangential fixation, a winding lead passes through a groove of the I-shaped main shaft, the winding rotary table is axially fixed through a positioning shaft sleeve, the permanent magnet rotary table and the I-shaped main shaft form relative rotation through a bearing, an inner ring of the bearing and the positioning shaft sleeve are axially fixed, and the permanent magnet rotary tables and the outer shell are matched through the special shape to ensure torque transmission; the motor has the advantages that the torque of the motor can be changed conveniently by adding and subtracting the winding turntable and the permanent magnet turntable, the torque can be flexibly changed by only using the outer shells with different lengths, the cost for purchasing a new motor or refitting an old motor is greatly reduced in a factory, and the maintainability of the motor and the interchangeability of accessories are improved.

Description

Pluggable composite disc type permanent magnet brushless motor structure

Technical Field

The invention relates to the technical field of synchronous motors, in particular to a pluggable composite disc type permanent magnet brushless motor structure.

Background

At present, domestic synchronous motors are mostly ordinary cylindrical permanent magnet synchronous motors, and various problems such as cooling problem, low rotor core utilization rate and the like exist. Meanwhile, with the optimization of a series of processing technologies of the axial magnetic field motor, in order to meet the requirements of lightness, thinness and high power density, the disc type motor with obvious superiority in the specific fields is greatly developed and applied. The composite disc type permanent magnet brushless motor has the advantages of simple structure, high power density per unit volume, reliable operation, low maintenance cost, increased heat dissipation area and capability of realizing stepless speed regulation, and is a motor structure with development potential in the future.

However, for a disk motor, once the number of windings, the number of permanent magnets, the current and voltage, and the like are determined, various electromagnetic parameters of the motor are difficult to change, and in order to adapt to torques in different working conditions, two solutions are often used: in the first method, a speed reducer or an accelerator and other equipment are added, so that the actual output efficiency of the motor is reduced, and the production cost and the occupied area are improved; in the second method, a sensor is added and an industrial control computer is connected to carry out closed-loop servo control, and the motor is controlled to output a torque with a proper magnitude according to a real-time signal fed back by the sensor.

Disclosure of Invention

According to the technical problem that after parameters such as the number of windings, the number of permanent magnets, current and voltage and the like of the disc type motor are determined, the output torque of the motor cannot be changed, and the structure of the plug-in composite disc type permanent magnet brushless motor is provided. The invention mainly standardizes the winding turntable and the permanent magnet turntable of the composite disc type permanent magnet brushless motor, improves the structure, ensures that the winding turntable and the permanent magnet turntable can be assembled together through simple insertion, can meet the required motor performance by using the lowest cost as long as selecting the outer shell with proper length and the number of the turntables, and can flexibly adjust the output torque of the motor by changing the number of the turntables. The standardization of the winding turntable and the permanent magnet turntable also greatly improves the interchangeability, and is convenient for the maintenance of the motor and the replacement of parts.

The technical means adopted by the invention are as follows:

a pluggable composite disc type permanent magnet brushless motor structure comprises an I-shaped main shaft 1, a bearing 2, a permanent magnet turntable 3, a winding turntable 4, a positioning shaft sleeve 5 and an outer shell 6;

a through hole for the I-shaped spindle 1 to pass through is formed in the center of the winding turntable 4, and the through hole structure is matched with the groove of the I-shaped spindle 1 to realize tangential fixation;

wherein, the winding wire passes through the groove of the I-shaped main shaft 1;

the winding turntable 4 is fixed in the axial direction of the I-shaped main shaft 1 through a positioning shaft sleeve 5;

at least 2 permanent magnet rotating discs 3 are rotatably assembled with the I-shaped spindle 1 through bearings 2;

the winding rotary table 4 and the permanent magnet rotary table 3 are arranged in the axial direction of the I-shaped spindle 1 in an overlapping mode, and the permanent magnet rotary table 3 on the uppermost layer and the permanent magnet rotary table 3 on the lowermost layer are respectively used as the top surface and the bottom surface;

the inner ring of the bearing 2 and the positioning shaft sleeve 5 ensure axial fixation;

the outer shell 6 covers the outer part of the permanent magnet turntable 3 and is detachably assembled with the permanent magnet turntable 3 in a synchronous rotating mode.

Further, in the above-mentioned case,

a plurality of coils are symmetrically and uniformly wound on the upper surface and the lower surface of the winding turntable 4, and a lead passes through the winding turntable 4 to connect the coils on the upper surface and the lower surface;

and the matching structure of the I-shaped spindle 1 and the winding turntables 4 ensures matching, simultaneously, the winding lead can pass through the groove of the I-shaped spindle 1, and the winding turntables 4 at all levels are connected, so that the lead can pass through the permanent magnet turntables 3 to be connected with an external circuit.

Further, in the above-mentioned case,

bus connectors on the winding rotary table 4 are led out from the I-shaped protruding parts of the through holes of the winding rotary table, which are matched with the grooves of the I-shaped main shaft 1, and are arranged in a straight line, and in the installation process of the winding rotary table 4, the difference between two adjacent discs is 180 degrees by taking the I-shaped main shaft 1 as the center of a circle; under the condition that all the winding turntables 4 are the same, the main magnetic circuit sequence of the N-S type composite disc type permanent magnet brushless motor can be met only by rotating the installation angle of 180 degrees.

Further, in the above-mentioned case,

when n magnets are arranged on the actual permanent magnet rotary table 3, the number of the protrusions on the permanent magnet rotary table 3 and the number of the grooves of the I-shaped spindle 1 are changed to n, and the installation angle of two adjacent rotary tables is also changed to 360/n degrees.

For example: when 8 magnets are arranged on the permanent magnet rotary table 3, 8 bulges are arranged outside the permanent magnet rotary table and matched with 8 grooves on the outer shell 6, and in the installation process of the permanent magnet rotary table 3, the difference between two adjacent discs is 45 degrees by taking the I-shaped main shaft 1 as the circle center; therefore, the main magnetic circuit sequence of the N-S type composite disc type permanent magnet brushless motor can be met only by rotating the mounting angle of 45 degrees under the condition that each permanent magnet rotary disc 3 is ensured to be the same.

Further, in the above-mentioned case,

the length of outer shell 6 can change according to the quantity of carousel, also can establish ties two outer shells 6 through the bolt to this increases the quantity that can place the carousel, after satisfying the torque demand, can add suitable flange and totally enclosed outer shell 6.

Further, in the above-mentioned case,

the torque output form is that the fixed I-shaped main shaft 1 outputs torque by leaning on the outer shell 6, or the fixed outer shell 6 outputs torque by leaning on the I-shaped main shaft 1.

Compared with the prior art, the invention has the following advantages:

1. simple structure, convenient dismantlement, the usage is extensive, through shell body and the carousel quantity of chooseing for use suitable length, just can utilize the lowest cost to reach required motor performance, can avoid the condition appearance of performance surplus.

2. The structure of the common composite disc type permanent magnet brushless motor is improved, the complicated step of designing the N-S type composite disc type permanent magnet brushless motor is omitted, the winding rotary disc and the permanent magnet rotary disc can be assembled together through simple rotation and insertion, the output torque of the motor can be flexibly adjusted by changing the number of the rotary discs, and the efficiency of the motor is fundamentally improved.

3. The winding rotary table and the permanent magnet rotary table are standardized, and the winding rotary table and the permanent magnet rotary table of the same model can be exchanged among all motors with the same size of the outer shell at will, so that the maintenance and the machine modification are facilitated.

Based on the reason, the invention is suitable for factories which adopt a large number of disc type permanent magnet brushless motors as source power, is suitable for working environments with more different working conditions, is suitable for enterprises with higher requirements on the cost performance of the motors, and is suitable for electric vehicles or other machines with the participation of the motors with higher requirements on interchangeability, maintainability and standardization. Based on the reason, the invention can be widely popularized in the technical field of novel composite disc type permanent magnet brushless motors.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of the present invention.

Fig. 2 is a side view of the present invention.

FIG. 3 is a cross-sectional view of FIG. 1A-A.

FIG. 4 is a three-dimensional perspective view of the I-shaped spindle of the present invention.

Fig. 5 is an assembled three-dimensional perspective view of the present invention.

Fig. 6 is a three-dimensional perspective view of the winding turntable of the present invention.

Fig. 7 is a three-dimensional perspective view of the permanent magnet turntable of the present invention.

In the figure: 1. an I-shaped main shaft; 2. a bearing; 3. a permanent magnet turntable; 4. a winding turntable; 5. positioning the shaft sleeve; 6. an outer housing.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 7, the present invention provides a plug-in composite disc type permanent magnet brushless motor structure, which includes an i-shaped spindle 1, a bearing 2, a permanent magnet turntable 3, a winding turntable 4, a positioning shaft sleeve 5 and an outer shell 6;

Further, in the above-mentioned case,

In the first embodiment, as shown in fig. 3, 6, and 7, when the composite disc-type permanent magnet brushless dc motor is used, a three-phase six-state operation mode and a power supply mode of a bridge inverter circuit are adopted, 12 windings are respectively disposed on the upper plane and the lower plane of the winding turntable 4, the windings which are symmetrical to each other are connected with each other, the winding mode is a fractional-slot concentrated winding, 6 bus terminals are arranged on a line on an i-shaped protrusion of each winding turntable 4, (the winding turntable 4 includes a winding turntable i 4.1 and a winding turntable ii 4.2), and the winding turntable i 4.1 and the winding turntable ii 4.2 are disposed with the i-shaped spindle 1 as a rotation center, with a phase difference of 180 °.

The permanent magnet rotary table 3 is uniformly embedded with 8 neodymium iron boron permanent magnets, the central angle is 45 degrees, the magnetizing direction is axial, the polarity directions of two adjacent permanent magnets are opposite, 8 bulges are uniformly distributed on the outer part of the permanent magnet rotary table 3 and are matched with 8 grooves uniformly distributed on the outer shell, the permanent magnet rotary table 3 comprises a permanent magnet rotary table I3.1, a permanent magnet rotary table II 3.2 and a permanent magnet rotary table III3.3, and the permanent magnet rotary table I3.1, the permanent magnet rotary table II 3.2 and the permanent magnet rotary table III3.3 are respectively arranged with the I-shaped main shaft 1 as the rotation center and have a difference of 45 degrees along the same rotation direction.

The permanent magnet rotary table I3.1, the permanent magnet rotary table II 3.2 and the permanent magnet rotary table III3.3 are axially fixed by the aid of a certain height of an external bulge, the bearing 2 and the I-shaped main shaft 1 form relative rotation, the winding rotary table I4.1 and the winding rotary table II 4.2 are axially fixed by the aid of the positioning shaft sleeve 5 and an inner ring of the bearing 2, and the I-shaped structure and the I-shaped main shaft 1 form tangential fit.

The height of the outer shell 6 just can contain 3

permanent magnet turntables

3, 2 winding

turntables

4 and 4 positioning shaft sleeves 5, and a baffle plate is additionally arranged on the upper side of the outer shell 6 to be connected with the outer shell through bolts, so that the whole motor is positioned and fastened.

The permanent magnet rotary table 3 is made of magnetic conductive materials, and the winding rotary table 4, the positioning shaft sleeve 5, the outer side of the I-shaped main shaft 1 and the inner side of the outer shell 6 are made of non-magnetic conductive materials, so that the magnetic flux of the permanent magnet is forced to pass through an air gap and a winding turn chain to form a main magnetic circuit of the motor.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pluggable composite disc type permanent magnet brushless motor structure is characterized by comprising an I-shaped main shaft (1), a bearing (2), a permanent magnet turntable (3), a winding turntable (4), a positioning shaft sleeve (5) and an outer shell (6);

a through hole for the I-shaped spindle (1) to penetrate through is formed in the center of the winding turntable (4), and the through hole structure is matched with the groove of the I-shaped spindle (1) to realize tangential fixation;

wherein, the winding lead passes through the groove of the I-shaped main shaft (1);

the winding turntable (4) is fixed in the axial direction of the I-shaped main shaft (1) through a positioning shaft sleeve (5);

at least 2 permanent magnet rotating discs (3) are rotatably assembled with the I-shaped spindle (1) through bearings (2);

the winding rotary table (4) and the permanent magnet rotary table (3) are arranged in the axial direction of the I-shaped main shaft (1) in an overlapped mode, and the permanent magnet rotary table (3) serves as the top surface and the bottom surface of the uppermost layer and the lowermost layer respectively;

the inner ring of the bearing (2) and the positioning shaft sleeve (5) ensure axial fixation;

the outer shell (6) covers the outer part of the permanent magnet rotating disc (3) and is assembled with the permanent magnet rotating disc (3) in a detachable and synchronous rotating mode.

2. A pluggable composite disc-type permanent magnet brushless motor structure according to claim 1, wherein:

a plurality of coils are symmetrically and uniformly wound on the upper surface and the lower surface of the winding turntable (4), and a conducting wire passes through the winding turntable (4) to connect the coils on the upper surface and the lower surface;

and the matching structure of the I-shaped spindle (1) and the winding turntables (4) ensures matching, simultaneously, the winding lead can pass through the groove of the I-shaped spindle (1), and the winding turntables (4) at all levels are connected, so that the lead can pass through each permanent magnet turntable (3) to be connected with an external circuit.

3. A pluggable composite disc-type permanent magnet brushless motor structure according to claim 1, wherein:

bus connectors on the winding rotary table (4) are led out from the I-shaped protruding parts of the through holes of the winding rotary table, which are matched with the grooves of the I-shaped main shaft (1), and are arranged in a straight line, and in the installation process of the winding rotary table (4), the difference between two adjacent discs is 180 degrees by taking the I-shaped main shaft (1) as the circle center; under the condition that all the winding turntables (4) are the same, the main magnetic circuit sequence of the N-S type composite disc type permanent magnet brushless motor can be met only by rotating the mounting angle of 180 degrees.

4. A pluggable composite disc-type permanent magnet brushless motor structure according to claim 1, wherein:

the permanent magnet rotary table (3) and the outer shell (6) are provided with bulges and grooves in a matched mode.

5. A pluggable composite disc-type permanent magnet brushless motor structure according to claim 1, wherein:

the length of outer shell (6) can change according to the quantity of carousel, also can establish ties two outer shells (6) through the bolt to this increases the quantity that can place the carousel, after satisfying the torque demand, can add suitable flange and totally enclosed outer shell (6).

6. A pluggable composite disc-type permanent magnet brushless motor structure according to claim 1, wherein:

the torque output form is that the fixed I-shaped main shaft (1) outputs torque by leaning on the outer shell (6), or the fixed outer shell (6) outputs torque by leaning on the I-shaped main shaft (1).