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Permanent magnet rotor structure

A permanent magnet rotor, magnetic steel technology, applied in the shape/style/structure of the magnetic circuit, the rotating parts of the magnetic circuit, the magnetic circuit characterized by magnetic materials, etc., to achieve dynamic balance, ensure isotropy, improve The effect of resistance to demagnetization

Active Publication Date: 2017-12-12
GUIZHOU AEROSPACE LINQUAN MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a permanent magnet rotor structure, which solves the problem of pressure bearing force through sheath protection and interference fit design

Method used

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  • Permanent magnet rotor structure

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Embodiment Construction

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0024] like figure 1 As shown, a permanent magnet rotor structure, including a sheath 1, is characterized in that: the sheath 1 is provided with a magnetic steel 2, and the two sides of the magnetic steel 2 are respectively provided with a baffle 1 3 and a baffle 2 4 , the magnetic steel 2 and the sheath 1 are connected through an interference fit and glue coating; one side of the baffle plate 3 is provided with a rotating shaft 2 6, and one side of the baffle plate 2 4 is provided with a rotating shaft 5, and the shield The sleeve 1 and the rotating shaft 2 6 are integrated, and the rotating shaft 5 and the sheath 1 are welded to form an integral body.

[0025] The conical surfaces of the first rotating shaft 5 and the second rotating shaft 6 are provided with circumferentially symmetrical exhaust holes 7, which remove the air in...

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Abstract

The invention provides a permanent magnet rotor structure which comprises a sheath, wherein magnetic steel is arranged in the sheath; a first baffle plate and a second baffle plate are respectively arranged on the two sides of the magnetic steel; the magnetic steel is connected with the sheath in an interference fit and gumming manner; a second rotating shaft is arranged on one side of the first baffle plate; a first rotating shaft is arranged on one side of the second baffle plate; the sheath and the second rotating shaft are a whole; and the first rotating shaft and the sheath are welded to form a whole. The permanent magnet rotor structure improves the demagnetization resistance of a permanent magnet, reduces an influence of an armature reaction on the permanent magnet, can ensure radial isotropy of a rotor, facilitates dynamic balance of the rotor, and is applicable to a high-temperature high-speed generator with rotating speed greater than 72000r / min and with one pole pair.

Description

technical field [0001] The invention relates to a permanent magnet rotor structure, which belongs to the technical field of motors. Background technique [0002] High-speed permanent magnet synchronous generators have the advantages of small volume and weight, high power density, and high efficiency. Therefore, high-speed generators are research hotspots in the international electrotechnical field. The rotor is the core component of the high-speed permanent magnet motor. The permanent magnet of the rotor is usually made of sintered NdFeB or SmCo permanent magnet materials. This type of material can withstand a compressive stress of up to 1000MPa but cannot withstand a tensile stress greater than 82MPa. Therefore, protective measures are required. Sheath protection, the interference fit is adopted between the permanent magnet and the sheath, so as to apply pre-compressive stress to the permanent magnet and compensate the tensile stress generated by the centrifugal force durin...

Claims

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Application Information

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IPC IPC(8): H02K1/27H02K1/02
CPCH02K1/02H02K1/27H02K2213/03
Inventor 施道龙张登平卓亮邓波
Owner GUIZHOU AEROSPACE LINQUAN MOTOR CO LTD
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