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Magnetic steel, motor rotor and axial magnetic field motor

A technology of motor rotor and magnetic steel, applied in the direction of magnetic circuit rotating parts, circuits, magnets, etc., can solve problems such as large heat generation and affecting the working efficiency of the motor

Pending Publication Date: 2021-01-26
ZHEJIANG PANGOOD POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the size of the motor continues to increase, the internal reluctance of the NdFeB magnets begins to become prominent, and the large internal resistance of the NdFeB magnets will affect the working efficiency of the motor, and at the same time, there will be greater heat generation

Method used

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  • Magnetic steel, motor rotor and axial magnetic field motor
  • Magnetic steel, motor rotor and axial magnetic field motor
  • Magnetic steel, motor rotor and axial magnetic field motor

Examples

Experimental program
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Effect test

Embodiment 1

[0038] In Embodiment 1, the magnetic steel includes a three-layer structure, that is, the magnetic steel includes two magnetic layers 2 and a magnetic permeable layer group 3 sandwiched between the two magnetic layers 2, such as figure 1shown. Specifically, the material of the magnet layer 2 is NdFeB, and the magnetically permeable layer group 3 (that is, the magnetically permeable material layer) is specifically a silicon steel sheet. For the boron layer, the magnetic permeability of NdFeB is much smaller than that of the magnetic material layer. The relative magnetic permeability of silicon steel sheet is 7000-10000, and the relative magnetic permeability of NdFeB is 1. Among them, the relative magnetic permeability refers to the ratio of the magnetic permeability of a certain substance to the vacuum magnetic permeability, and the vacuum magnetic permeability is 4×3.14×10^(-7).

[0039] The thickness of the magnetic permeable layer group 3 in this scheme is 1 / 4 of the tota...

Embodiment 2

[0041] In this embodiment, the magnetic steel is still designed as a three-layer structure, including two layers of NdFeB materials and a layer of magnetically permeable material in the middle, wherein the magnetically permeable material is a silicon steel sheet, and the thickness of the rotor disk (ie, the thickness of the magnetic steel) is 12mm , the thickness of the front and rear two NdFeB materials is the same, the difference between embodiment 2 and embodiment 1 is: the thickness of each layer of NdFeB material is 4mm, the thickness of the magnetic material layer is 4mm, and the thickness of the magnetic material layer is 4mm. 1 / 3 of the total thickness, at this time, the relative internal resistance of the magnetic steel is 0.667R0. The simulation test data shows that the effective value of the motor line current is 110A, the motor torque is 160.5N·m, and the motor efficiency is 96.10%.

Embodiment 3

[0043] In this embodiment, the magnetic steel is still designed as a three-layer structure, including two layers of NdFeB materials and a layer of magnetically permeable material in the middle, wherein the magnetically permeable material is a silicon steel sheet, and the thickness of the rotor disc (that is, the thickness of the magnetic steel) is 12mm, the thickness of the front and back two pieces of NdFeB material is the same, the difference between embodiment 3 and embodiment 1 is: the thickness of each layer of NdFeB material is 4.2mm, the thickness of the magnetic material layer is 3.6mm, and the thickness of the magnetic material layer is 3 / 10 of the total thickness of the steel, at this time, the relative internal resistance of the magnetic steel is 0.7R0. The simulation test data shows that the effective value of the motor line current is 110A, the motor torque is 163.7N·m, and the motor efficiency is 96.22%.

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Abstract

The invention discloses magnetic steel, which comprises a magnetic conductive layer group and magnet layers clamped at two sides of the magnetic conductive layer group, and the relative permeability of the magnetic conductive layer group is greater than that of the magnet layers. Compared with the prior art, according to the scheme, the thickness of the magnet layer is reduced, and the magnetic conductive layer group with relatively high magnetic conductivity is added, so that the internal magnetic resistance of the whole magnetic steel can be greatly reduced on the premise of ensuring the original magnetic field intensity of the magnetic steel, the relatively high working efficiency of the motor is kept, the scheme can also effectively reduce the use amount of magnet materials, can improve the utilization rate of magnetic steel materials, and further can reduce the manufacturing cost of the motor. The invention further discloses a motor rotor comprising the magnetic steel and an axialmagnetic field motor.

Description

technical field [0001] The invention relates to the technical field of motor design, in particular to a magnetic steel, a motor rotor and an axial magnetic field motor. Background technique [0002] The axial field motor is composed of a stator and a rotor, wherein the stator is provided with a winding, and the rotor is provided with a magnetic steel, which is arranged opposite to the winding to interact with each other. When designing a high-torque axial field motor, it is necessary to provide a larger rotor disk to provide greater magnetic force. Therefore, the effective outer diameter of the motor also needs to be increased in design. When the design of the rotor disk is increased, the thickness of the rotor disk also needs to be increased accordingly to maintain the required rigidity of the rotor disk. When the thickness of the rotor disk is increased, the thickness of the magnetic steel also needs to be increased in order to ensure the gap between the magnetic steel an...

Claims

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Application Information

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IPC IPC(8): H02K1/06H02K1/27H02K1/28H01F7/02
CPCH01F7/0273H02K1/06H02K1/27H02K1/28
Inventor 何俊明王一奇章小林赵鹏
Owner ZHEJIANG PANGOOD POWER TECH CO LTD
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