Rotor structure of a double-layer sheathed permanent magnet motor

A permanent magnet motor, rotor structure technology, applied in the magnetic circuit shape/style/structure, motor, magnetic circuit rotating parts and other directions, can solve the problems of low utilization rate and low strength of permanent magnet materials, and avoid high temperature loss of magnetism , good stability, light weight effect

Active Publication Date: 2022-06-03
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a double-sheathed permanent magnet motor rotor structure to solve the problems of low strength and low utilization rate of permanent magnet materials in the existing rotor structure

Method used

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  • Rotor structure of a double-layer sheathed permanent magnet motor
  • Rotor structure of a double-layer sheathed permanent magnet motor
  • Rotor structure of a double-layer sheathed permanent magnet motor

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Embodiment 1

[0029] Embodiment 1: as figure 1 The rotor structure of a double-sheathed permanent magnet motor shown includes a first mandrel 1 , a second mandrel 2 , a permanent magnet unit 3 and a third mandrel 4 . The material of the first mandrel 1 and the second mandrel 2 is non-magnetic alloy steel and the outer surface is plated with tin bronze. The non-magnetic material can weaken the transmission path of magnetic flux leakage, reduce magnetic flux leakage, and improve motor performance; tin Bronze is used to reduce wind friction loss, thereby reducing heat generation and limiting rotor temperature rise. The material of the third mandrel 4 is a magnetic permeable alloy material, and the material of the permanent magnet unit 3 is a samarium cobalt permanent magnet material with a small temperature coefficient and a high working temperature.

[0030] like figure 2 , 3 As shown, the first mandrel 1 is a stepped shaft structure, including a first end 11 and an inner sheath 12 integr...

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Abstract

The present invention relates to the technical field of motors, in particular to a double-sheathed permanent magnet motor rotor structure, which includes a first mandrel, a second mandrel, a third mandrel and a plurality of permanent magnet units. One end of the first mandrel is opened There are a first tank body and a second tank body, the second tank body is located on the outside of the first tank body, a plurality of reinforcing ribs are evenly distributed in the second tank body along the axial direction, and the multiple reinforcing ribs divide the second tank body into multiple A sub-slot body, the permanent magnet unit is embedded in the sub-slot body; at least a part of the second mandrel is sheathed on the outer wall of the first mandrel, and a third slot is opened on the end of the second mandrel close to the first mandrel; The two ends of the three mandrels respectively abut against the bottoms of the first tank body and the third tank body. The double-sheathed permanent magnet motor rotor structure proposed by the invention solves the problems of low strength and low utilization rate of permanent magnet materials in the existing rotor structure.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a double-sheathed permanent magnet motor rotor structure. Background technique [0002] In recent years, the continuous development of power electronics technology and the continuous improvement of high-frequency power supply technology for motors have greatly improved the feasibility of the successful application of ultra-high-speed motors. The speed of ultra-high-speed motors can reach tens of thousands or even hundreds of thousands of revolutions per minute. Due to the use of permanent magnet rotor structure, the internal structure of the motor is very compact, and its size is much smaller than that of medium and low-speed motors of the same power. This makes ultra-high-speed The motor has extremely high power density, and at the same time it also has the advantages of high efficiency and good dynamic performance. Therefore, ultra-high-speed motors have broad application prosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/2706H02K1/28H02K7/00
CPCH02K1/2706H02K1/28H02K7/003Y02T10/64
Inventor 彭学院黄海洋李佐良冯健美张兆君
Owner XI AN JIAOTONG UNIV
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