阅读说明：本技术 一种新型的异步起动永磁同步电机转子冲片结构 (Novel rotor punching sheet structure of asynchronous starting permanent magnet synchronous motor ) 是由 钱伟 陈虎威 赵勇 于 2019-08-05 设计创作，主要内容包括：本发明公开了一种新型的异步起动永磁同步电机转子冲片结构,包括转子铁芯冲片、设置在转子铁芯冲片上的鼠笼条和转子磁钢,鼠笼条为双层鼠笼条,由两个相互连通的安装孔组成,并在转子铁芯冲片外边缘处开设插口,插口与安装孔相连通,转子铁芯冲片环面上设置倒V形的磁钢槽型组,磁钢槽型上设置容置转子磁钢的腔体,转子铁芯冲片环面上开设螺杆孔,转子铁芯冲片内边缘开设多个内层凹槽,调整电机的气隙磁密波形,降低电机噪声和振动。该电机转子冲片结构在实现电机具备良好的起动性能和输出性能情况下,还能够降低电机噪声和振动。(The invention discloses a novel rotor punching structure of an asynchronous starting permanent magnet synchronous motor, which comprises a rotor iron core punching sheet, a squirrel cage bar and rotor magnetic steel, wherein the squirrel cage bar and the rotor magnetic steel are arranged on the rotor iron core punching sheet, the squirrel cage bar is a double-layer squirrel cage bar and consists of two mutually communicated mounting holes, a socket is arranged at the outer edge of the rotor iron core punching sheet and is communicated with the mounting holes, an inverted V-shaped magnetic steel groove type group is arranged on the ring surface of the rotor iron core punching sheet, a cavity for containing the rotor magnetic steel is arranged on the magnetic steel groove type, a screw hole is arranged on the ring surface of the rotor iron core punching sheet, a plurality of inner-layer grooves are arranged at the inner edge of. The motor rotor punching structure can reduce the noise and vibration of the motor under the condition that the motor has good starting performance and output performance.)

1. The utility model provides a novel asynchronous starting PMSM rotor punching structure, characterized by: comprises a rotor iron core punching sheet (1), a squirrel cage bar (2) arranged on the rotor iron core punching sheet (1) and rotor magnetic steel (4), the squirrel-cage bars (2) are arranged on the outer ring surface of the rotor core punching sheet (1), the squirrel-cage bars (2) are double-layer squirrel-cage bars and are composed of two mutually communicated mounting holes, a socket (23) is arranged at the outer edge of the rotor iron core punching sheet (1), the socket (23) is communicated with the mounting hole, a magnetic steel groove group is arranged on the ring surface of the rotor iron core punching sheet (1) for mounting rotor magnetic steel (4), the magnetic steel groove group consists of two magnetic steel groove types (3) which are arranged in an inverted V shape, an outer convex part is arranged in the length direction of the magnetic steel groove type (3) to form a cavity (32) for accommodating the rotor magnetic steel (4), at least two screw holes (6) are arranged on the ring surface of the rotor iron core punching sheet (1), the inner edge of the rotor core punching sheet (1) is provided with a plurality of inner-layer grooves (5).

2. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor according to claim 1, characterized in that the squirrel cage bars (2) are arranged on the outer annular surface of the rotor core punching (1) in an annular array, and the pitch angle α is 8 degrees and is 45 in total.

3. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, characterized in that: the squirrel cage bar (2) mounting hole be the circular port, the diameter is 10mm, first circular port (21) center-to-center distance of piece (1) is 220mm, second circular port (22) center-to-center distance of piece (1) is 236 mm.

4. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor is characterized in that the unfolding angle β of the two magnetic steel groove types (3) is 135 degrees, a magnetic isolation bridge (31) is arranged between the two magnetic steel groove types (3), and the width of the magnetic isolation bridge (31) is 2 mm.

5. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, characterized in that: the magnetic steel groove group annular array is arranged on the inner ring surface of the rotor core punching sheet (1), the number of the magnetic steel groove group annular array is 8, each magnetic steel groove type (3) is provided with 1 cavity (32), and 1 rotor magnetic steel (4) is embedded in each cavity (32).

6. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 5, characterized in that: and fillers are paved between the cavity (32) and the rotor magnetic steel (4) so as to improve the stability of the rotor magnetic steel (4).

7. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 6, characterized in that: the filler is high-temperature resistant insulating fiber.

8. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, characterized in that: and the screw holes (6) are uniformly distributed on the ring surface of the rotor core punching sheet (1) in 4.

9. The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor as claimed in claim 1, characterized in that: inner layer recess (5) establish to the arc, annular array arranges the inward flange at rotor core towards piece (1), quantity is 8, and arc radius is 20mm, and arc angle theta is 100.

Technical Field

The invention relates to the technical field of asynchronous starting permanent magnet synchronous motors, in particular to a novel rotor punching structure of an asynchronous starting permanent magnet synchronous motor.

Background

With the rapid development of socioeconomic, the demand of electricity in the whole society shows explosive increase, for example, compared with 2016, the electricity consumption in 2017 nationwide is 63077 hundred million kilowatt hours, and the electricity consumption is increased by 6.6% on a par; in 2018, the total electricity consumption in China is 68449 hundred million kilowatt-hours. Compared with the condition that the electricity consumption of the resident side accounts for 36.6 percent of the electricity consumption of the whole society, the proportion of the industrial electricity consumption in China is up to more than 65 percent, but researches show that the electricity utilization efficiency in the field is lower and the electricity is seriously wasted, for example, the electricity consumption in the form of heat occupies 3 to 8 percent of the electricity consumption. Thus, the limited energy supply leads to the increasingly prominent regional energy supply contradiction.

The continuous perfection of the current motor production and manufacturing technology improves the output performance of a motor driving system to a great extent, saves partial energy supply and relieves the energy demand load in the industrial field. Due to the characteristics of high body height efficiency and high power density, the rare earth permanent magnet synchronous motor has attracted extensive attention and research of motor research developers. Up to now, due to the continuous updating and development of technology and the increasing requirements on the performance of the motor, asynchronous starting permanent magnet synchronous motors have appeared. The asynchronous starting permanent magnet synchronous motor is a novel energy-saving high-efficiency motor, is different from a common motor, on one hand, a rotor is provided with a permanent magnet, the structure is simple, and the asynchronous starting permanent magnet synchronous motor has higher motor performance under the same condition; on the other hand, different from a speed-regulating permanent magnet synchronous motor, the squirrel cage bar is arranged on the rotor, the self-starting capability is realized under a certain condition, and the motor has the advantages of stronger operation stability, higher efficiency, lower cost and the like, and can meet the ever-increasing market demand. However, the air gap flux density has a great relationship with the operation performance of the motor, and the generated harmonic waves greatly and seriously affect the performance of the motor under the normal operation condition of the common asynchronous permanent magnet synchronous motor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: based on the problems and the defects of the prior art, a novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor is designed, so that the motor has good starting performance and output performance, and the noise and vibration of the motor can be reduced.

The technical scheme adopted by the invention for solving the technical problems is as follows: a novel rotor punching structure of an asynchronous starting permanent magnet synchronous motor comprises a rotor core punching sheet, a squirrel cage bar and rotor magnetic steel, wherein the squirrel cage bar and the rotor magnetic steel are arranged on the rotor core punching sheet, the squirrel cage bar is arranged on the outer ring surface of the rotor core punching sheet, the squirrel cage bar is a double-layer squirrel cage bar, the output of a larger starting rotating speed is realized, the squirrel cage bar is composed of two mutually communicated mounting holes, a socket is arranged at the outer edge of the rotor core punching sheet, the socket is communicated with the mounting holes, a magnetic steel groove group is arranged on the ring surface of the rotor core punching sheet and used for mounting the rotor magnetic steel, the magnetic steel groove group is composed of two magnetic steel groove types which are arranged in an inverted V shape, an outer convex part is arranged in the length direction of the magnetic steel groove type to form a cavity for holding the rotor magnetic steel, at least, a plurality of inner layer grooves are formed in the inner edge of the rotor core stamped sheet, the air gap flux density waveform of the motor is adjusted, and noise and vibration of the motor are reduced.

Furthermore, the squirrel cage bar annular array is arranged on the outer ring surface of the rotor core stamped sheet, and the pitch angle is 8 degrees and is 45 in total.

Furthermore, the mounting holes of the squirrel cage bars are circular holes, the diameter of each circular hole is 10mm, the distance from the center of each first circular hole to the center of each rotor core stamped piece is 220mm, and the distance from the center of each second circular hole to the center of each rotor core stamped piece is 236 mm.

Further, two the angle of expansion of the magnetic steel groove type be 135 degrees, set up the magnetic bridge that separates between two magnetic steel groove types, the width that separates the magnetic bridge is 2mm, guarantees that the motor well exports torque performance and lower magnetic leakage phenomenon.

Furthermore, the magnetic steel groove group annular array is arranged on the inner ring surface of the rotor core punching sheet, the number of the magnetic steel groove group annular array is 8, each magnetic steel groove is provided with 1 cavity, and 1 rotor magnetic steel is embedded in each cavity.

Furthermore, fillers are paved between the cavity and the rotor magnetic steel to improve the stability of the rotor magnetic steel.

Further, the filler is high-temperature-resistant insulating fiber.

Furthermore, the screw holes are set to be 4 uniformly distributed on the ring surface of the rotor core punching sheet.

Further, the inner layer grooves are arc-shaped, the annular arrays are arranged on the inner edge of the rotor core stamped sheet, the number of the inner layer grooves is 8, the arc radius is 20mm, and the arc angle is 100 degrees.

The novel rotor punching structure of the asynchronous starting permanent magnet synchronous motor has the advantages that firstly, the rotor double-squirrel-cage structure realizes larger starting rotating speed output and improves starting performance; secondly, the V-shaped rotor magnetic steel groove structure improves the performance of the motor under the rated working condition and realizes synchronous rotating speed by combining with a motor stator winding; the magnetic isolation bridge between the groove types ensures good output torque performance and lower magnetic flux leakage of the motor; thirdly, the rotor inner layer groove structure improves the harmonic wave in the air gap, so that the air gap waveform is similar to a sine wave type under the working condition, and the noise and vibration of the motor are reduced; in addition, high-temperature resistant insulating fibers are attached to the notches of the magnetic steel sheets as fillers, so that the stability of the magnetic steel sheets is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a schematic structural view of a magnetic steel slot group;

in the figure, 1, a rotor core punching sheet, 2, a squirrel cage bar, 21, a first circular hole, 22, a second circular hole, 23, a socket, 3, a magnetic steel groove type, 31, a magnetic isolation bridge, 32, a cavity, 4, rotor magnetic steel, 5, an inner layer groove and 6, a screw hole are arranged.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The structure is as shown in figure 1, the structure comprises a rotor core punching sheet 1, a squirrel cage bar 2 and a rotor magnetic steel punching sheet 4 which are arranged on the rotor core punching sheet 1, the rotor core punching sheet 1 adopts a mark of 50W470 material, the squirrel cage bar 2 annular array is arranged on the outer ring surface of the rotor core 1, a pitch angle α is 8 degrees, 45 pieces are totally adopted, the squirrel cage bar 2 is a double-layer rotor punching sheet, the larger starting rotating speed output is realized, as shown in figure 2, the structure is formed by a first circular hole 21 and a second circular hole 22 which are mutually communicated, the diameter of the first circular hole 21 is 10mm, the first circular hole 21 is fixedly connected with a circular hole 32, the central distance of the first circular hole 21 is equal to the central distance of the circular hole 32 of a circular hole 2, the central distance of the circular hole 32 of the circular hole 21 is adjusted, the central distance of the circular hole 32 is equal to the central distance of the circular hole 2, the circular hole 32 of the circular hole 32, the circular hole 32 is equal to the circular hole 1, the circular hole 32 is formed by the circular hole 2, the circular hole 32 is formed by the circular hole 32, the circular hole 32 is formed by the circular hole 2 is formed by the circular hole 32, the circular hole 32 is formed by the circular hole 32, the circular hole 2, the circular hole 32 is formed by the circular hole 32, the circular hole 32 is formed by the circular hole 2, the circular hole 2 is formed by the circular hole 2.

The invention is mainly used in a three-phase asynchronous starting permanent magnet synchronous motor for wind power generation, realizes the conversion of wind energy of renewable energy into electric energy, improves the energy utilization rate and reduces the dependence of people on thermal power generation. The motor rotor has wide application prospect in a plurality of fields such as transportation, aerospace and the like, and is one of the research directions in the manufacture of high-efficiency motors in recent years.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.