An asymmetric light-weight permanent magnet synchronous motor

Abstract

This utility model discloses an asymmetric lightweight permanent magnet synchronous motor, including a rotor core, a motor shaft, a stator, a housing, a front cover, and a rear cover. The rotor core includes a first silicon steel sheet, a second-to-last silicon steel sheet, and a final silicon steel sheet arranged from front to rear. Each of the first to second-to-last silicon steel sheets is annular and has a magnetic slot. The rotor core is mounted on the motor shaft. The front cover is mounted on the front face of the housing, and the rear cover is mounted on the rear face of the housing. The motor shaft is rotatably mounted between the front and rear covers. A balance disc is mounted on the front shaft. The final silicon steel sheet is an annular silicon steel sheet without magnetic slots, and balancing mud is bonded to its outer end face. This utility model reduces the weight of the motor, simplifies the installation process, lowers production costs, and provides a fast motor response speed.

Description

Technical Field

[0001] This utility model relates to a permanent magnet synchronous motor, and more particularly to an asymmetric lightweight permanent magnet synchronous motor, belonging to the field of motor technology. Background Technology

[0002] An existing permanent magnet synchronous motor includes a rotor core, a motor shaft, a stator, a housing, a front end cover, and a rear end cover. The rotor core is composed of multiple stacked silicon steel sheets, including a first silicon steel sheet and a last silicon steel sheet arranged from front to rear. Each silicon steel sheet from the first to the last is annular and has a magnetic slot, in which magnets are inserted. The stator is mounted on the housing, the rotor core is mounted on the motor shaft, the front end cover is mounted on the front face of the housing, and the rear end cover is mounted on the rear face of the housing. The motor shaft is rotatably mounted between the front end cover and the rear end cover. A first balancing disc is mounted on the front shaft, and a second balancing disc is mounted on the rear shaft. The second balancing disc on the rear shaft serves two purposes: dynamic balancing and preventing the magnets from being ejected from the magnetic slots under centrifugal force.

[0003] However, the existing permanent magnet synchronous motor has the following four disadvantages in production and use: (1) Installing a second balance disc on the rear shaft of the motor increases the weight of the motor; (2) The installation of the second balance disc is added during installation, which makes the process complicated; (3) The second balance disc needs to be processed during processing, which increases the production cost; (4) The motor response speed is slow during use. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an asymmetric lightweight permanent magnet synchronous motor that can reduce the weight of the motor, simplify the installation process, reduce the production cost, and has a fast motor response speed.

[0005] To solve the above-mentioned technical problems, this utility model adopts an asymmetric lightweight permanent magnet synchronous motor, including a rotor core, a motor shaft, a stator, a housing, a front end cover, and a rear end cover. The rotor core is made of multiple stacked silicon steel sheets, including a first silicon steel sheet, a second-to-last silicon steel sheet, and a final silicon steel sheet arranged from front to rear. Each of the first to second-to-last silicon steel sheets is annular and has a magnetic groove. The stator is mounted on the housing, the rotor core is mounted on the motor shaft, the front end cover is mounted on the front face of the housing, and the rear end cover is mounted on the rear face of the housing. The motor shaft is rotatably mounted between the front end cover and the rear end cover. A balance disc is mounted on the front shaft of the motor shaft. The final silicon steel sheet is an annular silicon steel sheet without magnetic grooves, and balancing mud is bonded to the outer end face of the final silicon steel sheet.

[0006] In this invention, each silicon steel sheet from the first to the last silicon steel sheet has a through hole, and bolts are inserted into the through holes to fasten each silicon steel sheet into an integral iron core.

[0007] In this invention, the thickness of each silicon steel sheet from the first to the last is 0.5 to 0.8 mm.

[0008] By adopting the above structure, this utility model has the following beneficial effects:

[0009] The last silicon steel sheet of the rotor core in this invention is a circular annular silicon steel sheet without magnet slots, and balancing mud is bonded to its outer end face. This structure has two advantages: First, the last silicon steel sheet lacks magnet slots, meaning it is simply a solid circular sheet. The absence of magnet slots prevents magnets from being ejected from the slots under centrifugal force, thus improving the motor's safety performance and ensuring long-term stable and reliable operation. Second, this invention eliminates the need for a second balancing disc, directly bonding the balancing mud to the outer end face of the last silicon steel sheet to achieve dynamic balancing. This not only reduces the motor's weight and simplifies the installation of the second balancing disc, lowering production costs, but also results in a faster motor response during use.

[0010] This utility model has a simple structure, is easy to implement, and is convenient to promote and apply. Attached Figure Description

[0011] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0012] Figure 1This is a schematic diagram of an asymmetric lightweight permanent magnet synchronous motor according to the present invention. The housing, front cover and rear cover are not shown in the figure.

[0013] Figure 2 This is a schematic diagram of an installation structure for the housing, front cover, and rear cover of this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of each silicon steel sheet from the first silicon steel sheet to the second-to-last silicon steel sheet in this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of the last silicon steel sheet in this utility model. Detailed Implementation

[0016] See Figures 1 to 4 The diagram illustrates an asymmetric lightweight permanent magnet synchronous motor, comprising a rotor core 1, a motor shaft 2, a stator, a housing 3, a front end cover 4, and a rear end cover 5 (the stator is not shown in the diagram). The rotor core 1 is composed of multiple stacked silicon steel sheets, including a first silicon steel sheet 1a, a second silicon steel sheet 1b, and a last silicon steel sheet 1c arranged from front to rear. Each of the silicon steel sheets 1a to 1b is annular and has a magnet slot 1-1, into which a magnet (not shown in the diagram) is inserted. The stator is fixedly mounted on the housing 3. The rotor core 1 is mounted on the motor shaft 2 via a key block 9 and a keyway structure. The front end cover 4 is mounted on the front end face of the housing 3 via screws. The rear end cover 5 is mounted on the rear end face of the housing 3 via screws. The motor shaft 2 is rotatably mounted between the front end cover 4 and the rear end cover 5 via bearings. A balance disc 6 is mounted on the front shaft of the motor shaft 2. The balance disc 6 is located between the front end cover 4 and the first silicon steel sheet 1a. The last silicon steel sheet 1c is an annular silicon steel sheet without a magnetic groove 1-1. Balance mud 7 is bonded to the outer end face of the last silicon steel sheet 1c.

[0017] In this utility model, such as Figure 3 , 4 As shown, each of the first silicon steel sheet 1a to the last silicon steel sheet 1c has a through hole 8. Bolts are inserted into the through holes 8 to fasten each silicon steel sheet into an integral iron core. Bolts are not shown in the figure.

[0018] In this invention, the thickness of each silicon steel sheet from the first silicon steel sheet 1a to the last silicon steel sheet 1c is preferably 0.5 to 0.8 mm.

[0019] After trial use, this utility model has a simple structure, reduces the weight of the motor, simplifies the installation process of the second balance disc, and reduces production costs. During use, the motor has a fast response speed and has achieved good practical results.

Claims

1. An asymmetric lightweight permanent magnet synchronous motor, comprising a rotor core (1), a motor shaft (2), a stator, a housing (3), a front end cover (4), and a rear end cover (5); the rotor core (1) is formed by stacking multiple silicon steel sheets, the rotor core (1) comprising a first silicon steel sheet (1a), a second silicon steel sheet (1b), and a last silicon steel sheet (1c) arranged from front to rear, wherein each silicon steel sheet from the first silicon steel sheet (1a) to the second silicon steel sheet (1b) is of the following shape: The motor shaft (2) is annular and has magnetic slots (1-1) on each side. The stator is mounted on the housing (3), the rotor core (1) is mounted on the motor shaft (2), the front end cover (4) is mounted on the front end face of the housing (3), the rear end cover (5) is mounted on the rear end face of the housing (3), and the motor shaft (2) is rotatably mounted between the front end cover (4) and the rear end cover (5). A balance disc (6) is mounted on the front shaft of the motor shaft (2). The motor shaft (2) is characterized by the following features: The last silicon steel sheet (1c) is an annular silicon steel sheet without a magnetic groove (1-1), and a balancing mud (7) is bonded to the outer end face of the last silicon steel sheet (1c).

2. The asymmetric lightweight permanent magnet synchronous motor according to claim 1, characterized in that: Each silicon steel sheet from the first silicon steel sheet (1a) to the last silicon steel sheet (1c) has a through hole (8), and bolts are inserted into the through holes (8) to fasten each silicon steel sheet into an integral iron core.

3. The asymmetric lightweight permanent magnet synchronous motor according to claim 1 or 2, characterized in that: The thickness of each silicon steel sheet from the first silicon steel sheet (1a) to the last silicon steel sheet (1c) is 0.5 to 0.8 mm.

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