CN219717967U - Permanent magnet synchronous motor rotor structure and permanent magnet synchronous motor - Google Patents

Abstract

The utility model relates to a permanent magnet synchronous motor rotor structure and a permanent magnet synchronous motor, wherein the rotor structure comprises a rotor iron core, magnetic steel and a steel sleeve, the rotor iron core comprises a plurality of rotor block iron cores distributed along the circumference, each rotor block iron core is of the same structure, each rotor block iron core is provided with a mounting part matched with the magnetic steel, each rotor block iron core is distributed along the circumference to form an annular structure, and the steel sleeve is sleeved on the outer side of the annular structure. Compared with the prior art, the traditional rotor core is divided into a plurality of rotor block cores according to the pole number, so that the die cost is greatly reduced, the utilization rate of the silicon steel sheet steel strip is greatly improved, and the production efficiency is greatly improved.

Description

Permanent magnet synchronous motor rotor structure and permanent magnet synchronous motor

Technical Field

The utility model relates to the technical field of motors, in particular to a permanent magnet synchronous motor rotor structure and a permanent magnet synchronous motor.

Background

With the development of permanent magnet materials, power electronics and other technologies, permanent magnet synchronous motors are increasingly used in various automation devices, military industry and other special fields of devices;

with the rapid development of the automation industry, the performance requirements of various terminal equipment manufacturers (especially high-end equipment such as robots, special operation equipment, military equipment and the like) on motor products are higher and higher, for example: the motor has high dynamic response, high power density, small cogging torque and the like; meanwhile, at present, enterprises push out permanent magnet synchronous motor products, and market competition is also more and more intense. These all require motor manufacturers to develop and produce more and more efficiently, and the cost is effectively controlled;

in order to improve the competitiveness of motor products in the market, the design scheme is designed with the scheme cost of main materials (such as stator and rotor cores, magnetic steel, copper wires, a shell, an end cover and the like) of the motor.

As shown in fig. 1-3, the rotor core is a schematic diagram of the structure and assembly process of a surface-mounted rotor core, a linear embedded rotor core and a V-shaped embedded rotor core, the existing design scheme is that an integrally formed integral rotor core is firstly produced, the integral rotor core is designed into a whole circle shape, and the clearance is designed according to the design of the magnetic steel shape, the design for reducing inertia and the design for the trend of a magnetic circuit;

according to the magnetic circuit loop during production, N, S pole magnetic steels are sequentially inserted into adjacent magnetic steel grooves; when the magnetic steel is installed, the polarity of the magnetic steel is required to be considered, otherwise, the error is easy to place, and the situation that the motor cannot run is caused; the surface-mounted (spm) rotor is easy to attract and collide with adjacent magnetic steel in the past when the magnetic steel is installed, so that the magnetic steel is broken;

as shown in fig. 4-6, the surface-mounted rotor core, the in-line embedded rotor core and the V-shaped embedded rotor core are shown in a schematic drawing in a stamping state on a silicon steel sheet steel belt, in the drawing, the silicon steel sheets in the circular areas shown by 1, 2, 3, 4 and 5 are unavailable spaces, and the silicon steel sheets are wasted greatly during stamping.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a permanent magnet synchronous motor rotor structure and a permanent magnet synchronous motor, which can improve the material utilization rate of silicon steel sheets and save the cost of a rotor core.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a permanent magnet synchronous motor rotor structure, includes rotor core and magnet steel, permanent magnet synchronous motor rotor structure still includes the steel bushing, rotor core includes a plurality of rotor piecemeal iron cores of distributing along the circumference, each rotor piecemeal iron core is the same structure, each rotor piecemeal iron core all be equipped with magnet steel matched with installation department, each rotor piecemeal iron core distributes along the circumference and forms annular structure, the steel bushing is established annular structure's outside.

Further, the rotor block iron core is of an equally-divided structure of the rotor iron core.

Further, the rotor segmented core is shaped as a minimal repeating unit of the overall rotor core.

Further, the mounting portions are located in the rotor segmented core and symmetrically distributed with respect to a central axis of the rotor segmented core.

Further, the rotor core is a surface-mounted rotor core, a plurality of magnetic steel fixing convex blocks are uniformly arranged on the outer side of the surface-mounted rotor core, and the separation line of two adjacent rotor block cores is the center line of the magnetic steel fixing convex blocks.

Further, the rotor core is a linear embedded rotor core, a plurality of linear through holes are uniformly formed in the linear embedded rotor core, and the separation line of every two adjacent rotor block cores is a center line between every two adjacent linear through holes.

Further, the rotor core is a V-shaped embedded rotor core, a plurality of V-shaped through holes are uniformly formed in the V-shaped embedded rotor core, and the separation line of two adjacent rotor block cores is the center line between the two adjacent V-shaped through holes.

Further, the steel sleeve and the annular structure are bonded or welded with each other.

The utility model also provides a permanent magnet synchronous motor, which comprises a rotor structure, wherein the rotor structure comprises a rotor iron core and magnetic steel, the rotor structure further comprises a steel sleeve, the rotor iron core comprises a plurality of rotor segmented iron cores distributed along the circumference, each rotor segmented iron core is of the same structure, each rotor segmented iron core is provided with a mounting part matched with the magnetic steel, each rotor segmented iron core is distributed along the circumference to form an annular structure, and the steel sleeve is sleeved on the outer side of the annular structure.

Further, the rotor segmented core is shaped as a minimal repeating unit of the overall rotor core.

Compared with the prior art, the utility model has the following advantages:

(1) According to the scheme of the rotor core of the rotary permanent magnet synchronous motor, the traditional rotor core is separately stamped and produced according to the number of poles, so that the die cost is greatly reduced, the utilization rate of the silicon steel sheet steel strip is greatly improved, and the production efficiency is greatly improved.

(2) The rotor iron core is divided into a plurality of rotor block iron cores with the same structure, the rotor block iron cores can be directly processed on the silicon steel sheet steel belt during processing, the rotor block iron cores can be mutually embedded through inclined planes, the waste material area on the silicon steel sheet steel belt is small, the material utilization rate of the silicon steel sheet is high, and the cost of the rotor iron core is saved.

(3) Because the rotor segmented iron core with smaller units is adopted, the die opening difficulty of the die is reduced, and the die cost is also low.

(4) The single rotor module is smaller, so that batch and automatic production (magnetic steel pasting or magnetic steel inserting) of factories is facilitated; the rotor module is prepared and supplied according to the task amount of the whole production line, so that the material stacking area and space of a production site are reduced, and the 5S management on the site is facilitated.

Drawings

Fig. 1 is a schematic diagram of an assembly process of a surface-mounted rotor core provided in the background art of the present utility model, in which arrows represent magnetic steel attachment;

FIG. 2 is a schematic diagram of an assembly process of a linear embedded rotor core provided in the background art, wherein an arrow in the diagram represents an inserted magnetic steel;

FIG. 3 is a schematic diagram of an assembly process of a V-shaped embedded rotor core provided in the background art, wherein an arrow in the diagram represents an inserted magnetic steel;

fig. 4 is a schematic diagram of a punching state of a surface-mounted rotor core on a silicon steel sheet steel belt provided in the background art of the present utility model;

fig. 5 is a schematic diagram of a stamping state of a linear embedded rotor core on a silicon steel sheet steel belt provided in the background art of the utility model;

fig. 6 is a schematic diagram of a stamping state of a V-shaped embedded rotor core on a silicon steel sheet steel belt provided in the background art of the present utility model;

fig. 7 is a schematic diagram showing a structural change in a process of assembling a rotor block core of a surface-mounted rotor core according to an embodiment of the present utility model;

fig. 8 is a schematic diagram showing a structural change in a process of assembling a rotor block core of an in-line type embedded rotor core according to an embodiment of the present utility model;

fig. 9 is a schematic diagram showing a structural change in a process of assembling a rotor block core of a V-shaped embedded rotor core according to an embodiment of the present utility model;

fig. 10 is a schematic diagram of a stamping state of a rotor block iron core of a surface-mounted rotor iron core on a silicon steel sheet steel belt according to an embodiment of the present utility model;

fig. 11 is a schematic diagram of a stamping state of a rotor block iron core of a linear embedded rotor iron core on a silicon steel sheet steel belt according to an embodiment of the present utility model;

fig. 12 is a schematic diagram of a stamping state of a rotor block iron core of a V-shaped embedded rotor iron core on a silicon steel sheet steel belt according to an embodiment of the present utility model;

in the figure, 1, rotor core, 11, surface-mounted rotor core, 111, magnet steel fixing lug, 12, straight embedded rotor core, 121, straight through hole, 13, V-shaped embedded rotor core, 131, V-shaped through hole, 101, rotor block core, 102, installation department, 2, magnet steel, 3, steel bushing.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

Example 1

The embodiment provides a permanent magnet synchronous motor rotor structure, including rotor core 1 and magnet steel 2, permanent magnet synchronous motor rotor structure still includes steel bushing 3, and rotor core 1 includes a plurality of rotor section iron cores 101 of distributing along the circumference, and each rotor section iron core 101 is the same structure, and each rotor section iron core 101 all is equipped with the installation department 102 with magnet steel 2 matched with, and each rotor section iron core 101 distributes along the circumference and forms annular structure, and the outside at annular structure is established to the steel bushing 3 cover.

The rotor iron core 1 is divided into the plurality of rotor segmented iron cores 101 with the same structure, the rotor segmented iron cores 101 can be directly processed on the silicon steel sheet steel belt during processing, the rotor segmented iron cores 101 can be mutually embedded through inclined planes, the waste material area on the silicon steel sheet steel belt is small, the material utilization rate of the silicon steel sheet is high, and the cost of the rotor iron core 1 is saved.

In addition, as the rotor segmented iron core 101 with smaller units is adopted, the die opening difficulty is reduced, and the die cost is also low;

the single rotor module is smaller, so that batch and automatic production (magnetic steel pasting or magnetic steel inserting) of factories is facilitated; the rotor module is prepared and supplied according to the task amount of the whole production line, so that the material stacking area and space of a production site are reduced, and the 5S management on the site is facilitated.

The rotor segmented core 101 is an equipartition structure of the rotor core 1, the mounting portion 102 is located in the rotor segmented core 101 and symmetrically distributed around a central axis of the rotor segmented core 101, and the shape of the rotor segmented core 101 is preferably the smallest repeating unit of the whole rotor core 1.

The steel sleeve 3 is matched with the shape and the size of the outermost side surface of the whole rotor segmented iron core 101 combined into an annular structure, and the annular structure formed by the steel sleeve 3 and the rotor segmented iron core 101 is directly sleeved, or further adhered to each other, or further welded to each other, and the like, so that the whole connection is realized.

The rotor structure suitable for the scheme can be various existing symmetrical rotor core structures, including surface-mounted rotor structures (including but not limited to surface protruding structures, surface embedded structures and the like), embedded rotor structures (including but not limited to u-type rotor structures, v-type rotor structures, w-type rotor structures and the like).

Three rotor structures of the permanent magnet synchronous motor are correspondingly provided for the rotor cores with three structural forms.

1. As shown in fig. 7, the rotor core 1 is a surface-mounted rotor core 11, a plurality of magnetic steel fixing protrusions 111 are uniformly provided on the outer side of the surface-mounted rotor core 11, and the separation line of two adjacent rotor block cores 101 is the center line of the magnetic steel fixing protrusions 111, and the center line passes through the center of the original surface-mounted rotor core 11.

The assembling process of the rotor block iron core 101 corresponding to the surface-mounted rotor iron core 11 includes: firstly, magnetic steel 2 is attached to each rotor block iron core 101, then each rotor block iron core 101 is sequentially arranged to form a circular ring structure, and the outermost side is sleeved into a steel sleeve 3 for fixation, so that the whole assembly is completed.

As shown in fig. 10, the stamping distribution of the rotor block iron cores 101 corresponding to the surface-mounted rotor iron cores 11 on the silicon steel sheet steel belt is that the side surfaces of two adjacent surface-mounted rotor iron cores 11 are mutually connected and are exchanged from end to end in position, and the adjacent surface-mounted rotor iron cores are integrally arranged in a straight line shape.

2. As shown in fig. 8, the rotor core 1 is a linear embedded rotor core 12, the linear embedded rotor core 12 is uniformly provided with a plurality of linear through holes 121, and the separation line of two adjacent rotor block cores 101 is the center line between two adjacent linear through holes 121, and the center line passes through the center of the original linear embedded rotor core 12.

The assembling process of the rotor block core 101 corresponding to the in-line type embedded rotor core 12 includes: firstly, magnetic steel 2 is inserted into each rotor block iron core 101, then each rotor block iron core 101 is sequentially arranged to form a circular ring structure, and the outermost side is sleeved into a steel sleeve 3 for fixation, so that the whole assembly is completed.

As shown in fig. 11, the stamping distribution of the rotor block cores 101 corresponding to the in-line type embedded rotor cores 12 on the silicon steel sheet steel belt is that the side surfaces of two adjacent in-line type embedded rotor cores 12 are mutually connected and are exchanged from end to end in position, and are distributed in a straight line shape as a whole.

3. As shown in fig. 9, the rotor core 1 is a V-shaped embedded rotor core 13, the V-shaped embedded rotor core 13 is uniformly provided with a plurality of V-shaped through holes 131, and the separation line of two adjacent rotor block cores 101 is the center line between two adjacent V-shaped through holes 131, which passes through the center of the original V-shaped embedded rotor core 13.

The assembling process of the rotor block iron core 101 corresponding to the V-shaped embedded rotor iron core 13 includes: firstly, magnetic steel 2 is inserted into each rotor block iron core 101, then each rotor block iron core 101 is sequentially arranged to form a circular ring structure, and the outermost side is sleeved into a steel sleeve 3 for fixation, so that the whole assembly is completed.

As shown in fig. 12, the V-shaped embedded rotor cores 13 are arranged in a straight line on the whole by punching the rotor block cores 101 corresponding to the V-shaped embedded rotor cores 13 on the silicon steel sheet steel belt, the sides of two adjacent V-shaped embedded rotor cores 13 are mutually connected and exchanged from end to end in position, and only a small amount of silicon steel sheets on the upper and lower sides are wasted in the punching arrangement.

The embodiment also provides a permanent magnet synchronous motor, including rotor structure, this rotor structure includes rotor core 1 and magnet steel 2, rotor structure still includes steel bushing 3, rotor core 1 includes a plurality of rotor section iron cores 101 of distributing along the circumference, each rotor section iron core 101 is the same structure, each rotor section iron core 101 all is equipped with the installation department 102 with magnet steel 2 matched with, each rotor section iron core 101 distributes along the circumference and forms annular structure, steel bushing 3 cover are established in annular structure's outside.

The details and advantages of the rotor structure in the permanent magnet synchronous motor can be found in embodiment 1, and will not be described herein.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (10)

1. The utility model provides a permanent magnet synchronous motor rotor structure, includes rotor core (1) and magnet steel (2), its characterized in that, permanent magnet synchronous motor rotor structure still includes steel bushing (3), rotor core (1) are including a plurality of rotor piecemeal iron cores (101) that distribute along the circumference, each rotor piecemeal iron core (101) are the same structure, each rotor piecemeal iron core (101) all be equipped with magnet steel (2) matched with installation department (102), each rotor piecemeal iron core (101) are along circumference distribution formation loop configuration, steel bushing (3) cover are established the outside of loop configuration.

2. A rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that the rotor segment core (101) is a uniform structure of the rotor core (1).

3. A rotor structure of a permanent magnet synchronous motor according to claim 2, characterized in that the rotor segment core (101) is shaped as a minimal repeating unit of the overall rotor core (1).

4. A rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that the mounting portion (102) is located in the rotor block core (101) and symmetrically distributed with respect to a central axis of the rotor block core (101).

5. The rotor structure of a permanent magnet synchronous motor according to claim 1, wherein the rotor core (1) is a surface-mounted rotor core (11), a plurality of magnetic steel fixing protrusions (111) are uniformly arranged on the outer side of the surface-mounted rotor core (11), and a separation line of two adjacent rotor block cores (101) is a center line of the magnetic steel fixing protrusions (111).

6. The rotor structure of a permanent magnet synchronous motor according to claim 1, wherein the rotor core (1) is a linear embedded rotor core (12), the linear embedded rotor core (12) is uniformly provided with a plurality of linear through holes (121), and the separation line of two adjacent rotor block cores (101) is a center line between two adjacent linear through holes (121).

7. The rotor structure of a permanent magnet synchronous motor according to claim 1, wherein the rotor core (1) is a V-shaped embedded rotor core (13), the V-shaped embedded rotor core (13) is uniformly provided with a plurality of V-shaped through holes (131), and a separation line of two adjacent rotor block cores (101) is a center line between the two adjacent V-shaped through holes (131).

8. A rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that the steel jacket (3) is glued or welded to the ring structure.

9. The utility model provides a PMSM, includes rotor structure, this rotor structure includes rotor core (1) and magnet steel (2), its characterized in that, rotor structure still includes steel bushing (3), rotor core (1) are including a plurality of rotor piecemeal iron cores (101) that distribute along the circumference, each rotor piecemeal iron core (101) are the same structure, each rotor piecemeal iron core (101) all be equipped with magnet steel (2) matched with installation department (102), each rotor piecemeal iron core (101) are along circumference distribution formation annular structure, steel bushing (3) cover are established the outside of annular structure.

10. A permanent magnet synchronous motor according to claim 9, characterized in that the rotor segment core (101) is shaped as a minimal repeating unit of the overall rotor core (1).