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High-speed motor rotor based on segmented magnets and variable-section shaft

A high-speed motor and variable cross-section technology, which is applied to the rotating parts of the magnetic circuit, the shape/style/structure of the magnetic circuit, etc., which can solve the difficulty in ensuring the coaxiality of the rotor runout accuracy, the deformation and fracture of the permanent magnet, and the extremely high requirements for assembly tooling. High problems, to achieve the effect of good rigidity, high positioning accuracy and convenient assembly

Active Publication Date: 2020-01-07
鸣志电器(太仓)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the glue fails, the key A is loose and thrown out, causing the motor to fail
The most serious problem of this type of patent is that it is difficult to guarantee the runout accuracy of the rotor after the parts are assembled and the coaxiality of each part, and the requirements for the assembly tooling are extremely high.
Under high-speed conditions, the permanent magnet may be deformed, broken and broken

Method used

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  • High-speed motor rotor based on segmented magnets and variable-section shaft
  • High-speed motor rotor based on segmented magnets and variable-section shaft
  • High-speed motor rotor based on segmented magnets and variable-section shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figure 4 and 5 As shown, the high-speed motor rotor based on segmented magnets and variable-section shafts includes three segments of magnets 1, 3, and 4 and a stepped shaft 2. The stepped shaft 2 is inserted into each segment of magnets 1, 3, and 4 in sequence, and each segment of magnets The steel is provided with a matching shaft hole corresponding to the stepped shaft 2, and the thick end of the stepped shaft 2 is used as the output shaft end. The stepped shaft 2 is fixed to each section of magnetic steel by glue, and the adjacent magnetic steels are not adhered to each other.

[0031] From Figure 7 It can be seen that the through-shaft structure adopts a piece of magnetic steel, and the shaft section of the shaft section mated with the optical shaft is subjected to the same torque and load T, and the shaft diameter of the entire shaft section is required to be the same as the place where the bending moment is the largest (the bearing support of the dang...

Embodiment 2

[0034] Such as Figure 8 As shown, the rotor of the present invention includes a section of magnetic steel and a stepped shaft, and the rest are the same as in Embodiment 1.

Embodiment 3

[0036] Such as Figure 9 As shown, the rotor of the present invention includes two sections of magnetic steel and a stepped shaft, and the rest are the same as in Embodiment 1.

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Abstract

The invention relates to a high-speed motor rotor based on segmented magnetic steel and a variable cross-section shaft. The rotor includes at least one segment of magnetic steel and the variable cross-section shaft. The variable cross-section shaft is sequentially inserted into each segment of magnetic steel. An aperture of each segment of magnetic steel is the same with a shaft diameter of a corresponding shaft segment of the variable cross-section shaft. A large end of the variable cross-section shaft is used as an output shaft end. Compared to a rotor in the prior art, the high-speed motor rotor has the advantages of high rotor positioning precision, high strength and great rigidity and the like.

Description

technical field [0001] The invention relates to a high-speed motor rotor, in particular to a high-speed motor rotor based on segmented magnetic steel and a variable-section shaft. Background technique [0002] Now the motor rotor generally adopts the through-shaft structure, such as figure 1 shown. In this structure, the magnetic steel b is directly bonded on the optical axis a, which has the characteristics of simple part process, convenient assembly, high precision, high strength and good rigidity. However, when the rated torque of the small motor is large and the outer diameter of the magnetic steel is small, the rotor is required to have a large shaft diameter. If the shaft diameter is too large, the space ratio of the permanent magnet will be small, the space utilization rate will not be high, and the electromagnetic efficiency will decrease. In addition, in order to be able to provide sufficient electromagnetic torque, the axial length of the permanent magnet must be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/22
Inventor 金万兵聂慧凡唐斌松何欣雍玉芳
Owner 鸣志电器(太仓)有限公司
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