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Composite soft magnetic powder magnetic conducting material for slot wedge of electric machine and preparation thereof

A technology of magnetic conductive material and motor slot wedge, applied in the direction of inorganic material magnetism, electrical components, electromechanical devices, etc., can solve the problems of motor eddy current loss rise, shedding and cracking, low mechanical properties, etc., to reduce additional losses and eddy currents Loss, effect of high mechanical properties

Inactive Publication Date: 2007-04-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low mechanical properties make it difficult to process these two types of magnetic materials. They often fall off and crack after being applied to motors, which greatly limits their application.
The low insulation performance makes these two types of magnetic materials in motor applications cause the eddy current loss of the motor to increase significantly
Although the additional loss of the motor is reduced, the efficiency is still improved, but this is based on the premise of sacrificing the eddy current loss of the motor

Method used

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  • Composite soft magnetic powder magnetic conducting material for slot wedge of electric machine and preparation thereof
  • Composite soft magnetic powder magnetic conducting material for slot wedge of electric machine and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment makes carbonyl iron powder / MnZn ferrite soft magnetic composite powder to prepare the magnetic material, and the process steps are as follows:

[0017] (1) Ingredients: glass fiber 30%; soft magnetic composite powder 20% (MnZn ferrite powder: Fe powder = 4: 1); epoxy resin 50%. The above percentages are volume percentages. The glass fiber is added in the form of glass cloth, and the resin is fully impregnated on the glass cloth.

[0018] (2) Lamination: Divide the evenly mixed composite soft magnetic powder according to the number of glass cloth layers, and then place the uniformly distributed composite powder on the glass cloth to obtain a prepress. The pre-press material is overlapped layer by layer to obtain the structure shown in Fig. 2 .

[0019] (3) Hot pressing: Put the laminated prepress into the template for hot pressing, so that the resin melts and flows to bond the composite magnetic powder and fiber. The hot pressing temperature is the cur...

Embodiment 2

[0023] This embodiment makes the magnetic permeable material prepared by FeSiAl / MnZn ferrite soft magnetic composite powder, and the process steps are as follows:

[0024] (1) Ingredients: glass fiber 25%; soft magnetic composite powder 25% (MnZn ferrite powder: FeSiAl powder = 3: 2); epoxy resin 50%. The above percentages are volume percentages. The glass fiber is added in the form of glass cloth, and the resin is fully impregnated on the glass cloth.

[0025] (2) Lamination: Divide the evenly mixed composite soft magnetic powder according to the number of glass cloth layers, and then place the uniformly distributed composite powder on the glass cloth to obtain a prepress. The pre-press material is overlapped layer by layer to obtain the structure shown in Fig. 2 .

[0026] (3) Hot pressing: Put the laminated prepress into the template for hot pressing, so that the resin melts and flows to bond the composite magnetic powder and fiber. The hot pressing temperature is the cu...

Embodiment 3

[0030] In this embodiment, the magnetic conductive material prepared by reduced iron powder / MnZn ferrite soft magnetic composite powder is prepared, and the process steps are as follows:

[0031] (1) Ingredients: glass fiber 20%; soft magnetic composite powder 20% (MnZn ferrite powder: reduced Fe powder=1:4); epoxy resin 60%. The above percentages are volume percentages. The glass fiber is added in the form of glass cloth, and the resin is fully impregnated on the glass cloth.

[0032](2) Lamination: Divide the evenly mixed composite soft magnetic powder according to the number of glass cloth layers, and then place the uniformly distributed composite powder on the glass cloth to obtain a prepress. The pre-press material is overlapped layer by layer to obtain the structure shown in Fig. 2 .

[0033] (3) Hot pressing: Put the laminated prepress into the template for hot pressing, so that the resin melts and flows to bond the composite magnetic powder and fiber. The hot pressi...

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Abstract

The invention relates to a dynamo using slot wedge using compound soft magnetic powder magnetic conductance material. The powder is the compound soft magnetic powder compounded from MnZn ferrite powder and reduced iron powder or carbonyl iron dust. The radio is 10-90wt% high resistivity magnetic powder, and 10-90wt% high magnetic permeability magnetic powder. Adding certain quantity glass fiber into compounded magnetic powder layer, separating structure would be formed. The invention could decrease supplementary load loss of dynamo, as well as eddy current loss, and improve efficiency of dynamo.

Description

technical field [0001] The invention belongs to the field of soft magnetic materials, in particular to a composite soft magnetic powder magnetic conduction material for motor slot wedges. Background technique [0002] As we all know, the total loss of the motor is composed of copper loss, iron loss, mechanical loss and additional loss. Among them, the iron loss is mainly composed of hysteresis loss and eddy current loss, and the additional loss is composed of pulse vibration loss and surface loss. At present, domestic and foreign motor research and development institutions are looking for ways to reduce motor loss and improve motor efficiency from the perspective of motor structure and motor materials. From the perspective of motor materials, the most effective method is to use magnetic slot wedges made of magnetically permeable materials to replace the insulating slot wedges in the original motor stator slot structure, and use the magnetic permeabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/20H02K3/493
Inventor 刘颖李军许自贵涂铭旌
Owner SICHUAN UNIV
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