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A high power density permanent magnet motor rotor structure and a motor using it

A high power density, permanent magnet motor technology, applied in the direction of magnetic circuit shape/style/structure, synchronous motor with stationary armature and rotating magnet, magnetic circuit rotating parts, etc., can solve the problem that the efficiency of the motor cannot be fully improved, The performance of the excitation magnetic steel cannot be fully utilized, and the power density of the motor is limited.

Active Publication Date: 2018-06-01
FORTIOR TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes the performance of the excitation magnetic steel unable to be fully utilized, the power density of the motor is limited, and the efficiency of the motor cannot be fully improved

Method used

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  • A high power density permanent magnet motor rotor structure and a motor using it
  • A high power density permanent magnet motor rotor structure and a motor using it
  • A high power density permanent magnet motor rotor structure and a motor using it

Examples

Experimental program
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Effect test

Embodiment 1

[0035] refer to Figure 5 , 6 As shown, the present invention discloses a high power density motor rotor structure, which includes a rotor casing 1, a rotor excitation magnetic steel 2, and a magnetic wedge 5, wherein:

[0036] The magnetic wedges 3 are made of ferromagnetic materials, which are set as a group, and are respectively arranged in the gaps between the N pole and the S pole of the rotor exciting magnetic steel 2 . In specific implementation, the magnetic wedges 5 can be made of ferromagnetic materials such as electrical steel. In addition, the magnetic wedges 5 are of a split type and formed one by one. After the magnetic wedge 5 is made of a ferromagnetic material such as electrical steel, its mechanical strength is very high, and the size can be precisely controlled. Therefore, after the magnetic wedge 5 made of ferromagnetic material is installed on the rotor, The rotor exciting magnetic steel 2 can also be supported to enhance the mechanical strength of the r...

Embodiment 2

[0042] refer to Figure 10 As shown, it is a schematic structural diagram of the second embodiment of the permanent magnet synchronous motor of the present invention. Compared with the first embodiment, the difference lies in:

[0043] In this embodiment, the magnetic wedge 5 includes a ring 51 and a set of vertical rods 52 arranged on the ring 51. In this embodiment, the vertical rod 52 and the ring 51 are integrally formed. The rod 52 is located in the gap between the N pole and the S pole of the rotor field magnet 2 .

[0044] The integrated design enables better control of assembly precision and more convenient assembly. And better strengthen the mechanical strength of the rotor.

Embodiment 3

[0046] refer to Figure 11 As shown, it is a schematic structural diagram of the third embodiment of the permanent magnet synchronous motor of the present invention. Compared with the first embodiment, the difference lies in:

[0047] In this embodiment, the magnetic wedge 5 is formed into a cylindrical body, and a groove 53 for accommodating the rotor exciting magnetic steel 2 is uniformly provided on the cylindrical wall of the cylindrical body. When in use, the rotor excitation magnetic steel 2 is evenly installed in the slot 53 , and the rods 52 between each slot 53 are located in the gap between the N pole and the S pole of the rotor excitation magnetic steel 2 . The structure of the magnetic wedge 5 not only enhances the thickness of the rotor yoke in the gap between the N pole and the S pole of the rotor excitation magnetic steel 2 of the rotor casing 1, but also strengthens the rotor casing 1 and the rotor excitation magnetic steel 2. The thickness of the contact loca...

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Abstract

The invention discloses a permanent magnet motor rotor structure with high power density and a motor with the same. The rotor structure comprises a rotor shell, rotor excitation magnetic steels and magnetic wedges, wherein the magnetic wedges are arranged in gaps between N poles and S poles of the rotor excitation magnetic steels. The magnetic wedges have high mechanical strength and the sizes of the magnetic wedges also can be very precise under machining control, so that the magnetic wedges also have a supporting effect on the rotor excitation magnetic steels after being mounted on a rotor, and the mechanical strength of the rotor is enhanced. Furthermore, the thickness of a magnet yoke part between every two rotor excitation magnetic steels is increased so that a magnetic saturation phenomenon is remitted, and a magnetic field capability generated by the rotor excitation magnetic steels is enhanced.

Description

technical field [0001] The invention relates to the technical field of motor rotors, in particular to a permanent magnet motor rotor structure with high power density and a motor using the same. Background technique [0002] Motor refers to an electromagnetic device that realizes electromechanical energy conversion according to the laws of electromagnetism. Permanent Magnet Synchronous Motors (PMSM) are playing an increasingly important role in modern industrial and household products due to their high power density and motor efficiency. In order to improve the power density of the motor, the magnetic steel of the rotor needs to be made of high magnetic energy permanent magnet materials such as NdFeB. The magnetic saturation phenomenon of the rotor core of the motor is also more obvious. [0003] exist figure 1 , 2 The basic structure of a permanent magnet synchronous motor (PMSM) with an outer rotor is shown, which includes a rotor casing 1', a rotor field magnet 2', a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K21/02H02K21/12
CPCH02K1/2773H02K1/28H02K21/222
Inventor 毕磊
Owner FORTIOR TECH SHENZHEN
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