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High-permeability and low-loss magnetic powder core

A high-permeability, low-loss technology, applied in the field of magnetic powder cores, to achieve the effect of improving permeability, excellent overall performance, and enhancing permeability

Inactive Publication Date: 2015-07-22
ANHUI HUALIN MAGNETIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of using the excellent soft magnetic properties of the magnetic powder core, it is necessary to strictly ensure that the loss value of the magnetic core is low. However, in the prior art, the magnetic powder core is still insufficient in low loss, and can continue to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the above proportions, the present embodiment 1 prepares the high permeability and low loss magnetic powder core according to the following steps:

[0021] S1: Sieve the magnetic powder through 100-mesh, 150-mesh, 200-mesh, 250-mesh, 320-mesh, and 500-mesh powder sieves in turn, and take 5% of the magnetic powder that passes through the 100-mesh powder sieve and does not pass through the 150-mesh powder sieve according to the weight fraction , 6% of the magnetic powder that passed the 150-mesh powder sieve and did not pass the 200-mesh powder sieve, 49% passed the 200-mesh powder sieve and did not pass the 250-mesh powder sieve, 25% passed the 250-mesh powder sieve and did not pass the 320-mesh powder sieve Magnetic powder, 10% of the magnetic powder that passed through the 320-mesh powder sieve and did not pass through the 500-mesh powder sieve, and 5% of the magnetic powder that passed through the 500-mesh powder sieve were mixed to obtain the mixed magnet...

Embodiment 2

[0026] According to the above proportions, the second embodiment of this example prepares the high permeability and low loss magnetic powder core according to the following steps:

[0027] S1: Sieve the magnetic powder through 100-mesh, 150-mesh, 200-mesh, 250-mesh, 320-mesh, and 500-mesh powder sieves in turn, and take 7% of the magnetic powder that passed through the 100-mesh powder sieve and failed to pass through the 150-mesh powder sieve according to the weight fraction , 4% of the magnetic powder passed through the 150-mesh powder sieve and failed to pass the 200-mesh powder sieve, 47% passed the 200-mesh powder sieve and failed to pass the 250-mesh powder sieve, 27% passed the 250-mesh powder sieve and failed to pass the 320-mesh powder sieve Magnetic powder, 12% of the magnetic powder that passed through a 320 mesh powder sieve and did not pass through a 500 mesh powder sieve, and 3% of the magnetic powder that passed through a 500 mesh powder sieve were mixed to obtain...

Embodiment 3

[0032] According to the above proportions, the third embodiment of the present invention prepared the high permeability and low loss magnetic powder core according to the following steps:

[0033] S1: Sieve the magnetic powder through 100 mesh, 150 mesh, 200 mesh, 250 mesh, 320 mesh, and 500 mesh powder sieves in turn, and take 6% of the magnetic powder that passes the 100 mesh powder sieve and does not pass the 150 mesh powder sieve according to the weight fraction , 5% of the magnetic powder passed through the 150-mesh powder sieve and failed to pass through the 200-mesh powder sieve, 48% passed through the 200-mesh powder sieve and failed to pass through the 250-mesh powder sieve, 26% passed through the 250-mesh powder sieve and failed to pass through the 320-mesh powder sieve Magnetic powder, 11% of the magnetic powder that passed through a 320 mesh powder sieve and did not pass through a 500 mesh powder sieve, and 4% of the magnetic powder that passed through a 500 mesh po...

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PUM

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Abstract

The invention discloses a high-permeability and low-loss magnetic powder core. Magnetic powder used by the high-permeability and low-loss magnetic powder core comprises Si, Fe, Cu, NB and B, wherein the mass ratio of Si to Fe is 9:98, the mole ratio of Fe to NB is 49:2, the mass ratio of NB to B is 31:11, and the mole ratio of Cu to B is 1:9. According to the formula, the preparation method for the high-permeability and low-loss magnetic powder core comprises the following steps of screening, passivation treatment, insulation coating treatment, compression moulding forming, powder core crystallization and stress-relief treatment; according to the powder core crystallization and stress-relief treatment, obtained green blanks are placed at the temperature from 520 DEG C to 540 DEG C and kept at the temperature for 60 min-70 min, a longitudinal magnetic field is exerted at the heat preservation stage to obtain the high-permeability and low-loss magnetic powder core.

Description

technical field [0001] The invention belongs to the technical field of magnetic powder cores, in particular to a magnetic powder core with high magnetic permeability and low loss. Background technique [0002] With the development of the economy, the requirements for high frequency, miniaturization and anti-electromagnetic interference of the inverter circuit are getting higher and higher. Metal magnetic powder core is a kind of soft magnetic material manufactured on the basis of powder metallurgy technology. Its advantages in magnetic properties make it widely used in many occasions. Compared with tape wound and laminated soft magnetic cores, magnetic powder cores have the advantages of constant magnetic permeability and soft magnetic properties, and have been widely used in the field of power electronics. In the case of using the excellent soft magnetic properties of the magnetic powder core, it is necessary to strictly ensure that the loss value of the magnetic core is l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F1/06B22F1/02B22F3/03
Inventor 沈宏江
Owner ANHUI HUALIN MAGNETIC TECH