CN212163119U - High-efficiency low-voltage three-phase asynchronous motor - Google Patents
High-efficiency low-voltage three-phase asynchronous motor Download PDFInfo
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- CN212163119U CN212163119U CN202020050305.4U CN202020050305U CN212163119U CN 212163119 U CN212163119 U CN 212163119U CN 202020050305 U CN202020050305 U CN 202020050305U CN 212163119 U CN212163119 U CN 212163119U
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Abstract
The utility model discloses a high-efficiency low-voltage three-phase asynchronous motor, which comprises a cast iron machine base, a winding stator, a finished rotor, a front end cover component, a rear end cover component, a front bearing component, a rear bearing component, an outer fan and an outer fan cover; the cast iron machine base is used for installing the winding stator, the finished rotor is arranged in the winding stator, the end cover assembly and the bearing assembly are used for supporting the finished rotor, the outer fan is arranged on the shaft, and the outer fan is positioned in the outer fan cover at the tail of the shaft; the ultra-high-efficiency low-voltage three-phase asynchronous motor is based on a new cast iron base, the radial height of a stator slot shape is increased under the condition that the magnetic density of an iron core yoke part of a stator is not increased by increasing the outer diameter size of a stator punching sheet of the existing motor, so that the purposes of increasing the area of the stator slot shape, improving the load capacity of a motor line and reducing copper loss are achieved, and meanwhile, a low-loss silicon steel sheet is adopted to further reduce the iron loss of the motor; the energy efficiency grade reaches or exceeds the IE4 energy efficiency and the like and standard through the reduction of copper loss and iron loss.
Description
Technical Field
The utility model relates to a technical field is made to the motor, specifically is a high-efficient low pressure three-phase asynchronous motor.
Background
The three-phase asynchronous motor is one kind of induction motor, and is one kind of motor powered by 380V three-phase AC power source (120 deg phase difference), and is called three-phase asynchronous motor because the rotating magnetic fields of the rotor and the stator rotate in the same direction and at different rotation speeds and have slip ratio. A three-phase asynchronous motor is a type of induction motor in which, after a stator is energized with a current, a part of the magnetic flux passes through a short-circuit ring and induces a current therein. The current in the short-circuit ring blocks the change of the magnetic flux, so that the magnetic fluxes generated by the short-circuit ring part and the short-circuit ring part are out of phase, and a rotating magnetic field is formed. After the power is switched on and started, the rotor winding induces electromotive force and current due to relative motion between the rotor winding and the magnetic field, namely, the rotating magnetic field and the rotor have relative rotating speed and interact with the magnetic field to generate electromagnetic torque, so that the rotor rotates, and energy conversion is realized. When three-phase stator windings (with an electrical angle of 120 degrees difference) of the motor are electrified with three-phase symmetrical alternating current, a rotating magnetic field is generated and cuts the rotor windings, so that induced current is generated in the rotor windings (the rotor windings are closed paths), current-carrying rotor conductors generate electromagnetic force under the action of the stator rotating magnetic field, so that electromagnetic torque is formed on a rotating shaft of the motor, the motor is driven to rotate, and the rotating direction of the motor is the same as the rotating direction of the rotating magnetic field; when a conductor cuts a magnetic line of force in a magnetic field, an induced current is generated in the conductor, and the name of an induction motor comes from the induced current. The combined action of the induced current and the magnetic field applies a driving force to the motor rotor.
The loss of the motor mainly comprises copper loss and iron loss, and the efficiency value of the motor can be obviously improved by effectively reducing the copper loss and the iron loss. The groove-shaped area of the stator is increased, and the electromagnetic wire with larger wire diameter is used, so that the copper loss can be effectively reduced; under the same magnetic density, the core loss can be obviously reduced by adopting the high-performance silicon steel sheet.
The existing low-voltage three-phase asynchronous motor has the defects that the stator punching size is small in the radial direction, the iron loss of a stator punching material and a rotor punching material is high under the unit condition, and the IE4 energy efficiency grade standard cannot be met.
For the reasons, it is necessary to limit the improvement of the efficiency level of the motor for the reason of the stator punching structure and the material of the existing low-voltage three-phase asynchronous motor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-efficient low pressure three-phase asynchronous motor to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a high-efficiency low-voltage three-phase asynchronous motor comprises a cast iron base, a wound stator, a finished rotor, a front end cover assembly, a rear end cover assembly, a front bearing assembly, a rear bearing assembly, an outer fan and an outer fan cover; the cast iron machine base is used for installing a wound stator, the finished rotor is arranged in the wound stator, rear end cover assemblies are fixedly arranged on two sides of the finished rotor respectively, a front bearing assembly is arranged between each rear end cover assembly and the corresponding front end cover assembly, and a rear bearing assembly is further arranged on the other side of each rear end cover assembly; the front end cover assembly, the rear end cover assembly, the front bearing assembly and the rear bearing assembly are used for supporting a finished rotor, and the outer fan is located in the outer fan cover.
Preferably, the stator core of the winding stator is formed by laminating a plurality of stator punching sheets.
Preferably, the stator punching sheet is made of high-performance low-loss silicon steel sheets.
Preferably, the loss of the stator punching sheet with the center height of 100 mm to 160 mm of the three-phase asynchronous motor under 1 Tesla and 50 Hz is 6W/kg; the loss of a stator lamination with a motor center height of 180 mm to 355 mm at 1 tesla and 50 hz is 4.7 w/kg.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses structural design is novel, and super high-efficient low pressure three-phase asynchronous motor is based on new cast iron frame, through increasing current motor stator punching sheet external diameter size, makes it increase the radial height of stator cell type under the condition that does not increase stator core yoke portion magnetic density to reach the purpose that increases stator cell type area, improves motor line load capacity, reduces the copper loss, adopts low-loss silicon steel sheet to further reduce motor iron loss simultaneously; the energy efficiency grade reaches or exceeds the IE4 energy efficiency and the like and standard through the reduction of copper loss and iron loss.
Drawings
Fig. 1 is a schematic sectional structure diagram of a super-high-efficiency low-voltage three-phase asynchronous motor.
Fig. 2 is a schematic structural diagram of a stator punching sheet.
In the figure: 1. a cast iron stand; 2. a wound stator; 3. a finished rotor; 4. a front end cap assembly; 5. a rear end cap assembly; 6. a front bearing assembly; 7. a rear bearing assembly; 8 outer fan, 9, outer fan housing.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a high-efficiency low-voltage three-phase asynchronous motor comprises a cast iron machine base 1, a wound stator 2, a finished rotor 3, a front end cover assembly 4, a rear end cover assembly 5, a front bearing assembly 6, a rear bearing assembly 7, an outer fan 8 and an outer fan cover 9; the cast iron machine base 1 is used for installing a wound stator 2, the finished rotor 3 is arranged in the wound stator 2, rear end cover assemblies 5 are fixedly arranged on two sides of the finished rotor 3 respectively, a front bearing assembly 6 is arranged between the rear end cover assemblies 5 and a front end cover assembly 4, and a rear bearing assembly 7 is further arranged on the other side of the rear end cover assembly 5; the front end cover assembly 4, the rear end cover assembly 5, the front bearing assembly 6 and the rear bearing assembly 7 are used for supporting the finished rotor 3, and the outer fan 8 is positioned in an outer fan cover 9.
The stator core of the winding stator is formed by laminating a plurality of stator punching sheets; according to different center heights and pole numbers, the outer diameter D1, the inner diameter D2 and the number of slots of the stator punching sheet are shown in the following table:
in the utility model, the stator punching sheet is made of high-performance low-loss silicon steel sheet; the loss of a stator punching sheet with the center height of 100 mm to 160 mm of the three-phase asynchronous motor under 1 Tesla and 50 Hz is 6W/kg; the loss of a stator lamination with a motor center height of 180 mm to 355 mm at 1 tesla and 50 hz is 4.7 w/kg.
A250 ten million, 4 utmost point, 50 Hz super high efficiency low pressure three-phase asynchronous motor which characterized in that: the cast iron frame is used for installing the winding stator, the finished rotor is arranged in the winding stator, the front end cover assembly, the rear end cover assembly, the front bearing assembly and the rear bearing assembly are used for supporting the finished rotor, and the outer fan is located in the outer fan cover. The outer diameter of the motor power stator punching sheet is increased to 600 mm, the inner diameter is 395 mm, 72 stator slots are formed, and the area of a single slot can reach 384.13 square mm. Because of the increase of the slot type area, each turn of winding can be formed by winding 16 electromagnetic wires with the square millimeter of 1.32, and the copper loss of the motor is effectively reduced. The stator punching sheet is made of 1 Tesla silicon steel sheet with loss of 4.7W/kg at 50 Hz, and the total iron loss can be reduced by about 20%. The final actual test efficiency is 96.7%, and the IE4 energy efficiency requirement is completely met.
To sum up, the utility model discloses structural design is novel, and super high-efficient low pressure three-phase asynchronous motor is based on new cast iron frame, through increasing current motor stator lamination external diameter size, makes it increase the radial height of stator cell type under the condition that stator core yoke portion magnetic density is not increased to reach the purpose that increases stator cell type area, improves motor line load capacity, reduces the copper loss, adopts low-loss silicon steel sheet to further reduce motor iron loss simultaneously; the energy efficiency grade reaches or exceeds the IE4 energy efficiency and the like and standard through the reduction of copper loss and iron loss.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A high-efficiency low-voltage three-phase asynchronous motor is characterized in that: the motor comprises a cast iron base (1), a winding stator (2), a finished rotor (3), a front end cover assembly (4), a rear end cover assembly (5), a front bearing assembly (6), a rear bearing assembly (7), an outer fan (8) and an outer fan cover (9); the cast iron machine base (1) is used for installing a wound stator (2), the finished rotor (3) is arranged in the wound stator (2), rear end cover assemblies (5) are fixedly arranged on two sides of the finished rotor (3) respectively, a front bearing assembly (6) is arranged between each rear end cover assembly (5) and each front end cover assembly (4), and a rear bearing assembly (7) is further arranged on the other side of each rear end cover assembly (5); the front end cover assembly (4), the rear end cover assembly (5), the front bearing assembly (6) and the rear bearing assembly (7) are used for supporting a finished product rotor (3), and the outer fan (8) is located in the outer fan cover (9).
2. A high efficiency, low voltage, three phase asynchronous motor according to claim 1, characterized in that: and a stator core of the winding stator (2) is formed by laminating a plurality of stator punching sheets.
3. A high efficiency, low voltage, three phase asynchronous motor according to claim 2, characterized in that: the stator punching sheet is made of high-performance low-loss silicon steel sheets.
4. A high efficiency, low voltage, three phase asynchronous motor according to claim 1, characterized in that: the loss of the stator punching sheet with the center height of 100 mm to 160 mm of the three-phase asynchronous motor under 1 Tesla and 50 Hz is 6W/kg; the loss of a stator lamination with a motor center height of 180 mm to 355 mm at 1 tesla and 50 hz is 4.7 w/kg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050305.4U CN212163119U (en) | 2020-01-10 | 2020-01-10 | High-efficiency low-voltage three-phase asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050305.4U CN212163119U (en) | 2020-01-10 | 2020-01-10 | High-efficiency low-voltage three-phase asynchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN212163119U true CN212163119U (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020050305.4U Active CN212163119U (en) | 2020-01-10 | 2020-01-10 | High-efficiency low-voltage three-phase asynchronous motor |
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| Country | Link |
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| CN (1) | CN212163119U (en) |
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2020
- 2020-01-10 CN CN202020050305.4U patent/CN212163119U/en active Active
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