阅读说明：本技术 一种新型的双定子异步起动永磁同步电机的铁芯结构 (Novel iron core structure of double-stator asynchronous starting permanent magnet synchronous motor ) 是由 陈虎威 赵勇 钱伟 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双定子异步起动永磁同步电机的铁芯结构,包括同轴设置的主定子、从定子以及设置在主定子与从定子之间的转子,主定子包括主定子冲片、定子主起动绕组,定子主起动绕组设置在主定子冲片的内环面,从定子包括从定子冲片、定子附加绕组,定子附加绕组绕设在从定子冲片的外环面上,转子包括转子冲片和均布在转子冲片环面上的若干转子磁钢槽组,转子冲片外环面上开设主起动鼠笼条安装孔,内环面上均布若干附加起动鼠笼条安装孔。该发明通过附加起动定子绕组提高电机起动性能以及平衡电机工况输出转矩,从而较大程度地提高电机起动性能和效率。(The invention discloses a novel iron core structure of a double-stator asynchronous starting permanent magnet synchronous motor, which comprises a main stator, a slave stator and a rotor, wherein the main stator, the slave stator and the rotor are coaxially arranged, the rotor is arranged between the main stator and the slave stator, the main stator comprises a main stator punching sheet and a stator main starting winding, the stator main starting winding is arranged on the inner ring surface of the main stator punching sheet, the slave stator comprises a slave stator punching sheet and a stator additional winding, the stator additional winding is wound on the outer ring surface of the slave stator punching sheet, the rotor comprises a rotor punching sheet and a plurality of rotor magnetic steel groove groups uniformly distributed on the ring surface of the rotor punching sheet, a main starting squirrel cage bar mounting hole is formed in the outer ring surface of the rotor punching sheet, and a plurality. The invention improves the starting performance of the motor and balances the working condition output torque of the motor by adding the starting stator winding, thereby greatly improving the starting performance and the efficiency of the motor.)

1. The utility model provides a novel two stator asynchronous starting PMSM's iron core structure which characterized in that: the stator comprises a main stator, a slave stator and a rotor, wherein the main stator and the slave stator are coaxially arranged, the rotor is arranged between the main stator and the slave stator, the main stator comprises a plurality of main stator punching sheets (1) and a plurality of stator main starting windings (2) which are mutually overlapped, the stator main starting windings (2) are arranged on the inner ring surface of the main stator punching sheets (1), the slave stator comprises a plurality of slave stator punching sheets (8) and stator additional windings (7) which are mutually overlapped, the stator additional windings (7) are wound on the outer ring surface of the slave stator punching sheets (8), the rotor comprises a plurality of rotor punching sheets (5) which are mutually overlapped and a plurality of rotor magnetic steel groove groups which are uniformly distributed on the ring surface of the rotor punching sheets (5), a main starting squirrel cage bar mounting hole (3) is formed on the outer ring surface of the rotor punching sheets (5), and a plurality of additional starting squirrel.

2. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: the rotor magnetic steel groove group is set as 8 groups arranged in an annular array on the ring surface of the rotor punching sheet (5).

3. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 2, wherein: the rotor magnetic steel slot group include 4 embedding slots that are W shape symmetrical arrangement, 1 rotor magnetic steel sheet (4) is embedded in each embedding slot, the contained angle between first magnetic steel sheet (41) and second magnetic steel sheet (42) is 65 °, the contained angle between second magnetic steel sheet (42) and third magnetic steel sheet (43) is 84 °, the contained angle of (44) is 65 ° between third magnetic steel sheet (43) and fourth magnetic steel sheet.

4. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 3, wherein: one ends of the first magnetic steel sheet (41) and the fourth magnetic steel sheet (44) close to the outer ring edge of the rotor punching sheet (5) are embedded outside a curve where the circle center of the main starting squirrel cage bar mounting hole (3) is located.

5. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 3, wherein: 8 main starting squirrel cage bar mounting holes (3) are uniformly distributed between the first magnetic steel sheet (41) and the fourth magnetic steel sheet (44), and the included angle formed by the two adjacent main starting squirrel cage bar mounting holes (3) and the circle center of the rotor punching sheet (5) is 5 degrees.

6. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 3, wherein: and 1 pull rod screw hole (9) of the fixing device is respectively formed between the first magnetic steel sheet (41) and the second magnetic steel sheet (42) and between the third magnetic steel sheet (43) and the fourth magnetic steel sheet (44).

7. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: the additional starting squirrel cage bar mounting holes (6) are annularly arranged on the inner ring surface of the rotor punching sheet (5) in an array of 45, and the included angle formed by the two adjacent additional starting squirrel cage bar mounting holes (6) and the circle center of the rotor punching sheet (5) is 8 degrees.

8. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: the rotor magnetic steel sheet (4) is N38EH magnetic steel and is embedded on the rotor punching sheet (5) through an installation die.

9. The new iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor as claimed in claim 1, wherein: the rotor punching sheet (5) and the stator punching sheet are made of silicon steel material with the mark number of 50W 470.

Technical Field

The invention relates to the technical field of asynchronous starting permanent magnet synchronous motors, in particular to an iron core structure of a double-stator asynchronous starting permanent magnet motor different from the current permanent magnet synchronous motor.

Background

In recent years, the living environment has been deteriorated due to the large amount of use of non-renewable resources by human beings. For example, according to the relevant air quality report.

The motor, which is an indispensable driving core component in heavy industry, largely determines the amount of energy used. Until now, a large number of asynchronous induction motors (with the rotating speed of 1500-3000 r/min) and gear boxes are still used as equipment driving systems in the field, so that the lower energy utilization rate and energy consumption are brought. Considering the prominent performance of the permanent magnet motor in various aspects, compared with the similar motor, the weight of the motor is only 1/10 of that of the common motor, and meanwhile, the speed increasing box and the linkage device are omitted, so that the energy saving rate is 30-40%. Therefore, the permanent magnet motor is used in industrial production as soon as possible, and is one of effective ways for promoting smooth realization of the aims of energy conservation and emission reduction. However, the starting performance and efficiency of the existing permanent magnet motor are still to be improved, so that the permanent magnet motor is improved and innovated based on the current theoretical knowledge and design technology of the permanent magnet motor, and a novel iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor is provided.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: based on the current permanent magnet motor theoretical knowledge and design technology, the permanent magnet motor is improved and innovated, a novel iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor is provided, the starting performance of the motor is improved and the working condition output torque of the motor is balanced by adding a starting stator winding, and therefore the starting performance and the starting efficiency of the motor are improved to a great extent.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a novel two stator asynchronous starting PMSM's iron core structure, includes the main stator of coaxial setting, follows the stator and sets up at main stator and the rotor from between the stator, main stator include a plurality of main stator lamination of coincide each other, stator main starting winding set up the interior anchor ring at main stator lamination, the stator include a plurality of stator lamination, the additional winding of stator from of coincide each other, the additional winding of stator around establishing on the outer anchor ring from the stator lamination, the rotor include a plurality of rotor magnet steel groove groups of rotor lamination and the equipartition on the rotor lamination anchor ring of a plurality of mutual coincide, set up main starting squirrel cage strip mounting hole on the rotor lamination outer anchor ring, a plurality of additional squirrel cage strip mounting holes of equipartition on the interior anchor ring.

Further, the rotor magnetic steel groove group is set to be 8 groups arranged in an annular array on the ring surface of the rotor punching sheet.

Furthermore, the rotor magnetic steel slot group comprises 4 embedding slots which are symmetrically arranged in a W shape, 1 rotor magnetic steel sheet is embedded in each embedding slot, the included angle between the first magnetic steel sheet and the second magnetic steel sheet is 65 degrees, the included angle between the second magnetic steel sheet and the third magnetic steel sheet is 84 degrees, and the included angle between the third magnetic steel sheet and the fourth magnetic steel sheet is 65 degrees.

Furthermore, one end of the first magnetic steel sheet and one end of the fourth magnetic steel sheet close to the edge of the outer ring of the rotor punching sheet are embedded outside a curve where the center of the main starting squirrel cage bar mounting hole is located.

Furthermore, 8 main starting squirrel cage bar mounting holes are uniformly distributed between the first magnetic steel sheet and the fourth magnetic steel sheet, and the included angle formed by the two adjacent main starting squirrel cage bar mounting holes and the circle center of the rotor punching sheet is 5 degrees.

Furthermore, 1 fixing device pull rod screw hole is respectively arranged between the first magnetic steel sheet and the second magnetic steel sheet, and between the third magnetic steel sheet and the fourth magnetic steel sheet.

Furthermore, the additional starting squirrel cage bar mounting holes are arranged on the inner ring surface of the rotor punching sheet in an annular array of 45, and the included angle formed by the two adjacent additional starting squirrel cage bar mounting holes and the circle center of the rotor punching sheet is 8 degrees.

Furthermore, the rotor magnetic steel sheet is N38EH magnetic steel and is embedded on the rotor punching sheet through a mounting die.

Further, the rotor punching sheet and the stator punching sheet are made of silicon steel material with the mark number of 50W 470.

The invention discloses a novel iron core structure of a double-stator asynchronous starting permanent magnet synchronous motor, which has the beneficial effects that: the rotor punching sheet and the stator punching sheet are made of silicon steel material with the mark of 50W470 and low cost, so that the manufacturing cost is saved; the additional starting squirrel cage bar is combined with the stator additional winding, so that the starting torque and the torque of a locked-rotor working condition in the starting process of the motor are improved; the double squirrel cage bars and the rotor magnetic steel structure increase the inductance of the cross shaft and reduce the magnetic leakage, thereby greatly improving the starting performance and the efficiency of the motor.

Drawings

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

FIG. 1 is a schematic cross-sectional view of the present invention;

in the figure: 1. the structure comprises a main stator punching sheet, 2 stator main starting windings, 3 main starting squirrel cage bar mounting holes, 4 rotor magnetic steel sheets, 41 first magnetic steel sheets, 42 second magnetic steel sheets, 43 third magnetic steel sheets, 44 fourth magnetic steel sheets, 5 rotor punching sheets, 6 additional starting squirrel cage bar mounting holes, 7 stator additional windings, 8 auxiliary stator punching sheets and 9 fixing device pull rod screw holes.

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.

As shown in fig. 1, the novel iron core structure of the double-stator asynchronous starting permanent magnet synchronous motor comprises a main stator, a slave stator and a rotor, wherein the main stator and the slave stator are coaxially arranged, the rotor is arranged between the main stator and the slave stator, the main stator comprises a plurality of mutually overlapped main stator punching sheets 1, the stator main starting winding 2 is arranged on the inner ring surface of the main stator punching sheet 1, the auxiliary stator comprises a plurality of mutually overlapped auxiliary stator punching sheets 8 and stator additional windings 7, the stator additional windings 7 are wound on the outer ring surface of the auxiliary stator punching sheets 8, the rotor comprises a plurality of mutually overlapped rotor punching sheets 5 and 8 groups of rotor magnetic steel groove groups uniformly distributed on the ring surface of the rotor punching sheets 5, the outer ring surface of the rotor punching sheets 5 is provided with a main starting squirrel cage bar mounting hole 3, the inner ring surface is uniformly provided with 45 additional starting squirrel cage bar mounting holes 6, and the included angle formed by the two adjacent additional starting squirrel cage bar mounting holes 6 and the circle center of the rotor punching sheets 5 is 8 degrees.

Each rotor magnetic steel slot group comprises 4 embedding slots which are symmetrically arranged in a W shape, 1 rotor magnetic steel sheet 4 is embedded in each embedding slot, the included angle between the first magnetic steel sheet 41 and the second magnetic steel sheet 42 is 65 degrees, the included angle between the second magnetic steel sheet 42 and the third magnetic steel sheet 43 is 84 degrees, and the included angle between the third magnetic steel sheet 43 and the fourth magnetic steel sheet 44 is 65 degrees; one ends of the first magnetic steel sheet 41 and the fourth magnetic steel sheet 44 close to the edge of the outer ring of the rotor punching sheet 5 are embedded outside a curve where the circle center of the main starting squirrel cage bar mounting hole 3 is located.

8 main starting squirrel cage bar mounting holes 3 are uniformly distributed between the first magnetic steel sheet 41 and the fourth magnetic steel sheet 44, the number of the main starting squirrel cage bar mounting holes is 64, and the included angle formed by the two adjacent main starting squirrel cage bar mounting holes 3 and the circle center of the rotor punching sheet 5 is 5 degrees; 1 fixing device pull rod screw hole 9 is respectively arranged between the first magnetic steel sheet 41 and the second magnetic steel sheet 42, and between the third magnetic steel sheet 43 and the fourth magnetic steel sheet 44.

The rotor punching sheet 5 and the stator punching sheet are made of silicon steel material with the mark number of 50W 470; the rotor magnetic steel sheet 4 is N38EH magnetic steel and is embedded on the rotor punching sheet 5 through an installation mould.

In the process of mounting the magnetic steel sheet, a special mounting die is adopted for embedding the magnetic steel sheet; meanwhile, if the demagnetization performance of the magnetic steel is reduced, a layer of thin copper sheet can be wound on the periphery of the rotor iron core. In the working process of the motor, if the starting performance requirement standard is not high, the electrified power supply of the additional winding of the stator can be disconnected; and conversely, loading the stator additional winding power supply. The locked-rotor condition is the same as the above on/off operation.

The invention provides a novel iron core structure of a double-stator asynchronous starting permanent magnet synchronous motor, which is based on the current permanent magnet motor theoretical knowledge and design technology, improves and innovates the permanent magnet motor, actually improves the starting performance of the motor and reduces the manufacturing cost of a motor driving system, and comprises double squirrel cage bars with higher starting performance and a rotor magnetic steel structure, thereby increasing the cross shaft inductance and reducing the magnetic leakage, and further improving the starting performance and the efficiency of the motor to a greater degree. Under the condition of reaching the standard of the high-efficiency motor, the motor can be widely applied to the fields of transportation, aerospace, chemical engineering and the like.

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.