CN211089419U - Core Structure of a Novel Double Stator Asynchronous Start Permanent Magnet Synchronous Motor - Google Patents

Abstract

The utility model discloses a novel iron core structure of a dual-stator asynchronous start permanent magnet synchronous motor, which comprises a main stator, a slave stator and a rotor arranged between the main stator and the slave stator coaxially arranged. The main stator includes a main stator. Punching, 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 includes the secondary stator punching sheet and the stator additional winding, and the stator additional winding is wound on the outer ring surface of the secondary stator punching sheet , The rotor includes rotor punching pieces and several rotor magnetic steel groove groups evenly distributed on the ring surface of the rotor punching piece. The outer ring surface of the rotor punching piece is provided with installation holes for the main starting squirrel cage bars, and the inner ring surface is evenly distributed with several additional starting squirrels. Cage bar mounting holes. The utility model improves the starting performance of the motor and balances the output torque of the motor under working conditions by adding a starting stator winding, thereby greatly improving the starting performance and efficiency of the motor.

Description

Core Structure of a Novel Double Stator Asynchronous Start Permanent Magnet Synchronous Motor

technical field

The utility model relates to the technical field of an asynchronous start permanent magnet synchronous motor, in particular to an iron core structure of a double stator asynchronous start permanent magnet motor which is different from the current permanent magnet synchronous motor.

Background technique

In recent years, the extensive application of non-renewable resources by humans has led to the continuous deterioration of the living environment. For example, according to relevant air quality reports, Beijing's air pollutants contain 73.5% hydrocarbons, 63.4% carbon monoxide, 65% lead and 46% nitrogen oxides, causing severe haze.

As an indispensable driving core component in heavy industry, the motor largely determines the amount of energy used. Among them, up to now, asynchronous induction motors (with a speed of 1500-3000 r/min) and gearboxes are still widely used in this field as equipment drive systems, which brings lower energy utilization rate and energy consumption. Considering the outstanding performance of permanent magnet motor technology in many aspects, compared with similar motors, the weight of this type of motor is only 1/10 of that of ordinary motors, and at the same time, the speed-increasing box and linkage device are omitted, which can achieve an energy saving rate of 30% to 40%. Therefore, the use of permanent magnet motors in industrial production as soon as possible is one of the effective ways to promote the smooth realization of energy saving and emission reduction goals. However, the existing permanent magnet motor still needs to be improved in terms of improving the starting performance and efficiency of the motor. Therefore, the present application improves and innovates the permanent magnet motor based on the current theoretical knowledge and design technology of the permanent magnet motor, and proposes a new type of double permanent magnet motor. The iron core structure of the stator asynchronous start permanent magnet synchronous motor.

Utility model content

The technical problem to be solved by the utility model is: based on the current theoretical knowledge and design technology of the permanent magnet motor, the permanent magnet motor is improved and innovated, and a new type of iron core structure of the double-stator asynchronous start permanent magnet synchronous motor is proposed. The additional starting stator winding improves the starting performance of the motor and balances the output torque of the motor under working conditions, thereby greatly improving the starting performance and efficiency of the motor.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a novel iron core structure of a dual-stator asynchronous start permanent magnet synchronous motor, comprising a main stator and a slave stator arranged coaxially, and a main stator and a slave stator arranged between the main stator and the slave stator. The main stator includes a number of superimposed main stator punches and a stator main start winding, the stator main start winding is arranged on the inner ring surface of the main stator punch, and the slave stator includes several The secondary stator punching sheets and the stator additional windings are superimposed on each other, and the stator additional windings are wound on the outer ring surface of the secondary stator punching sheets. There are several rotor magnetic steel groove groups on the ring surface of the punching piece. The outer ring surface of the rotor punching piece is provided with the main starting squirrel cage bar mounting holes, and the inner ring surface is evenly distributed with several additional starting squirrel cage bar mounting holes.

Further, the rotor magnetic steel groove groups are set as 8 groups arranged in an annular array on the annular surface of the rotor punching piece.

Further, the rotor magnetic steel slot group includes 4 embedded grooves symmetrically arranged in a W shape, and each embedded groove is embedded with one rotor magnetic steel sheet, the first magnetic steel sheet and the second magnetic steel sheet. The angle between them is 65°, the angle between the second magnet sheet and the third magnet sheet is 84°, and the angle between the third magnet sheet and the fourth magnet sheet is 65°.

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

Further, 8 main starting squirrel cage bar mounting holes are evenly distributed between the first magnetic steel sheet and the fourth magnetic steel sheet, and the clamping holes formed by the adjacent two main starting squirrel cage bar mounting holes and the center of the rotor punching sheet The angle is 5°.

Further, a fixing device pull rod screw hole is respectively opened between the first magnetic steel sheet, the second magnetic steel sheet, and the third magnetic steel sheet and the fourth magnetic steel sheet.

Further, the annular array of the installation holes for the additional starting squirrel cage bars is arranged on the inner ring surface of the rotor punching piece, a total of 45, and the angle formed between the installation holes of the two adjacent additional starting squirrel cage bars and the center of the rotor punching piece is: 8°.

Further, the rotor magnetic steel sheet is N38EH magnetic steel, and is inlaid on the rotor punching sheet through an installation die.

Further, the rotor punching sheet and the stator punching sheet are made of silicon steel material with a grade of 50W470.

The novel iron core structure of the double-stator asynchronous start permanent magnet synchronous motor of the utility model has the beneficial effects that the low-cost silicon steel material of the grade of 50W470 is selected for the rotor punching sheet and the stator punching sheet, which saves the manufacturing cost; The additional starting squirrel cage bars are combined with the additional stator windings to improve the starting torque during the starting process of the motor and the torque under locked-rotor conditions; the double squirrel cage bars and rotor magnetic steel structure increase the horizontal axis inductance and reduce the magnetic flux leakage, thereby Maximize motor starting performance and efficiency.

Description of drawings

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the sectional structure schematic diagram of the present utility model;

In the picture: 1. Main stator punching piece, 2. Stator main starting winding, 3. Main starting squirrel cage bar mounting hole, 4. Rotor magnet steel sheet, 41. First magnet steel sheet, 42. Second magnet steel sheet, 43. The third magnet sheet, 44. The fourth magnet sheet, 5. Rotor punching sheet, 6. Additional starting squirrel cage bar mounting hole, 7. Additional stator winding, 8. Punching sheet from stator, 9. Fixing device pull rod screw holes.

Detailed ways

The present utility model will now be described in further detail in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

As shown in Figure 1, a new type of core structure of a dual-stator asynchronous start permanent magnet synchronous motor includes a coaxially arranged main stator, a slave stator and a rotor arranged between the main stator and the slave stator. The main stator includes several The main stator punching sheet 1 and the stator main starting winding 2 are superimposed on each other. The stator main starting winding 2 is arranged on the inner ring surface of the main stator punching sheet 1. The secondary stator includes a number of superimposed secondary stator punching sheets 8 and additional stator windings. 7. The stator additional winding 7 is wound on the outer ring surface of the stator punch 8. The rotor includes a number of mutually superimposed rotor punches 5 and 8 sets of rotor magnetic steel slot groups that are evenly distributed on the ring surface of the rotor punch 5. , There are main starting squirrel cage bar mounting holes 3 on the outer ring surface of rotor punch 5, and 45 additional starting squirrel cage bar mounting holes 6 are evenly distributed on the inner ring surface. The included angle formed by the center of the sheet 5 is 8°.

Each rotor magnetic steel slot group includes 4 embedded grooves arranged symmetrically in a W shape, and one rotor magnetic steel sheet 4 is embedded in each embedded groove. The first magnetic steel sheet 41 and the second magnetic steel sheet 42 are between The included angle is 65°, the included angle between the second magnetic steel sheet 42 and the third magnetic steel sheet 43 is 84°, and the included angle between the third magnetic steel sheet 43 and the fourth magnetic steel sheet 44 is 65°; One end of the magnetic steel sheet 41 and the fourth magnetic steel sheet 44 close to the edge of the outer ring of the rotor punching piece 5 is embedded outside the curve where the center of the installation hole 3 of the main starting squirrel cage bar is located.

There are 8 main starting squirrel cage bar mounting holes 3 evenly distributed between the first magnetic steel sheet 41 and the fourth magnetic steel sheet 44, 64 in total. The formed angle is 5°; a fixing device pull rod screw hole 9 is respectively opened between the first magnetic steel sheet 41 and the second magnetic steel sheet 42 , 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 a grade of 50W470; the rotor magnetic steel sheet 4 is N38EH magnetic steel, and is embedded on the rotor punching sheet 5 through the installation die.

During the installation of the magnetic steel sheet, a special installation mold is used to inlay the magnetic steel sheet; at the same time, if the demagnetization performance of the magnetic steel is reduced, a thin copper skin can be wound around the rotor core. During the working process of the motor, if the starting performance requirements are not high, the energizing power supply of the additional stator winding can be disconnected; otherwise, the additional winding power supply of the stator can be loaded. In locked rotor condition, it is also the same as the above power-on and power-off operations.

Based on the current theoretical knowledge and design technology of the permanent magnet motor, the utility model improves and innovates the permanent magnet motor, thereby improving the starting performance of the motor and reducing the manufacturing cost of the motor drive system, and proposes a novel dual-stator asynchronous starting permanent magnet The iron core structure of the synchronous motor, which includes double squirrel cage bars and rotor magnetic steel structure with high starting performance, increases the inductance of the transverse axis and reduces the leakage flux, thereby greatly improving the starting performance and efficiency of the motor. Under the condition of reaching the high-efficiency motor standard, it can be widely used in transportation, aerospace, chemical industry and other fields.

Taking the above ideal embodiment according to the present invention as inspiration, through the above description, relevant staff can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present utility model is not limited to the content in the description, and its technical scope must be determined according to the scope of the claims.

Claims (9)

1. the iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor, is characterized in that: comprise the main stator that is coaxially arranged, from the stator and the rotor that is arranged between the main stator and the slave stator, the main The stator comprises a plurality of mutually superimposed main stator punching sheets (1), a stator main starting winding (2), and the stator main starting winding (2) is arranged on the inner annular surface of the main stator punching sheet (1). The slave stator includes a plurality of superimposed slave stator sheets (8) and additional stator windings (7). The rotor includes a number of mutually superimposed rotor punching pieces (5) and a number of rotor magnetic steel groove groups evenly distributed on the annular surface of the rotor punching piece (5). bar mounting holes (3), and several additional starting squirrel cage bar mounting holes (6) are evenly distributed on the inner ring surface. 2. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 1, characterized in that: the rotor magnetic steel groove group is set as an annular ring on the annular surface of the rotor punch (5) 8 groups of array arrangement. 3. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 2, wherein the rotor magnetic steel slot group comprises 4 embedded slots arranged symmetrically in a W shape , each embedded slot is embedded with a rotor magnetic steel sheet (4), the angle between the first magnetic steel sheet (41) and the second magnetic steel sheet (42) is 65°, and the second magnetic steel sheet ( 42) The included angle between the third magnetic steel sheet (43) and the third magnetic steel sheet (43) is 84°, and the included angle between the third magnetic steel sheet (43) and the fourth magnetic steel sheet (44) is 65°. 4. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 3, characterized in that: the first magnetic steel sheet (41) and the fourth magnetic steel sheet (44) The end close to the edge of the outer ring of the rotor punching piece (5) is embedded outside the curve where the center of the installation hole (3) of the main starting squirrel cage bar is located. 5. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 3, characterized in that: the first magnetic steel sheet (41) and the fourth magnetic steel sheet (44) Eight main starting squirrel cage bar mounting holes (3) are evenly distributed between them, and the included angle formed by two adjacent main starting squirrel cage bar mounting holes (3) and the center of the rotor punching piece (5) is 5°. 6. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 3, characterized in that: the first magnetic steel sheet (41) and the second magnetic steel sheet (42) and a fixing device pull rod screw hole (9) is respectively opened between the third magnetic steel sheet (43) and the fourth magnetic steel sheet (44). 7. The iron core structure of a novel dual-stator asynchronous starting permanent magnet synchronous motor according to claim 1, characterized in that: said additional starting squirrel cage bar mounting holes (6) are arranged in an annular array on the rotor punching sheet On the inner ring surface of (5), there are 45 in total, and the angle formed between the two adjacent additional starting squirrel cage bar mounting holes (6) and the center of the rotor punch (5) is 8°. 8. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 3, characterized in that: the rotor magnetic steel sheet (4) is N38EH magnetic steel, and is inlaid by an installation die on the rotor die (5). 9. The iron core structure of a novel dual-stator asynchronous start permanent magnet synchronous motor according to claim 1, characterized in that: the rotor punching sheet (5) and the stator punching sheet are made of silicon steel material with a trade mark of 50W470 .

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