Novel amorphous magnetic powder core and preparation method thereof

A magnetic powder core and amorphous technology, applied in the field of new amorphous magnetic powder core and its preparation, can solve the problems of unbalanced efficiency, increased reactive power consumption, damage to switching devices, etc., to achieve reduced efficiency, increased reactive power consumption, Effect of Reducing Switching Loss

Active Publication Date: 2017-03-22
JIANGXI AITE MAGNETS +1
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  • Application Information

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Problems solved by technology

[0003] There are two main problems in the existing switching power supply: one is that the efficiency cannot be balanced under different loads; the electrical equipment will not run at full load at the rated power for 24 hours, and it will be in standby state for part of the time
Second, the active PFC in the intermittent working mode or the alternating large current on the inductive load will cause the switching device to be easily damaged, the switching loss will increase, the reactive power consumption will increase, and the efficiency of the whole machine will be reduced.

Method used

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  • Novel amorphous magnetic powder core and preparation method thereof

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preparation example Construction

[0022] A novel amorphous magnetic powder core of the present invention is made by mixing amorphous alloy powder particles with metal soft tape materials, and its preparation method steps are as follows:

[0023] 1) Pretreatment of amorphous alloy powder particles, first dehumidify the amorphous alloy powder particles with a particle size of -100 to -500 mesh, and mix the dehumidified amorphous alloy powder particles with an insulating coating agent to control the insulating coating The amount of the coating agent added is 0.5%-8% of the mass of the amorphous alloy powder particles, the mixing treatment temperature is controlled at 20-130°C, and the mixing treatment time is 5-80 minutes, which is the pretreatment of the amorphous alloy powder particles;

[0024] 2) Heat treatment of flexible metal tapes, immersing a metal strip with a thickness of 15-500 microns in a sodium silicate or potassium silicate solution with a mass concentration of 1-20Wt%, and then at a temperature of...

Embodiment 1

[0034]1) Soak 150-mesh amorphous alloy powder with a weight of 23.5 grams in a dehumidifier for 10 minutes for dehumidification treatment. The dehumidifier is a mixture of 1% Wt phosphoric acid + 1 Wt % sodium silicate solution in mass concentration liquid, and then baked at 100°C for 20 minutes; 2) Iron-based nanocrystals with a thickness of 25 microns, national standard 1k107, metal winding cores, namely metal strips, with a size of OD23mm*ID20mm*HT6.5mm, Soak in sodium silicate diluted 30 times for 5 minutes, and then bake at 200°C for 50 minutes; 3) Put 12g of treated amorphous alloy powder into the cavity of OD26.9mm*ID14.7mm*HT11.2mm middle. 4) Put the metal winding magnetic core prepared in the second step into the mold cavity. 5) Then put the remaining 11.5 amorphous alloy powder into it. 6) The pressure reaches 21T / cm 2 Keep it for 10 seconds, and eject the mold; 7) Heat the pressure-molded magnetic core to 200°C under the condition of vacuum degree of 0.08Pa, and ...

Embodiment 2

[0035] Embodiment 2 The specific embodiment of this implementation is the same as Embodiment 1 and the above description except for the following description.

[0036] 1) Put 250-mesh amorphous alloy powder with a weight of 40 grams into a desiccant solution consisting of 0.8 g of tetraethyl orthosilicate and 0.8 g of zinc stearate, that is, the desiccant is composed of 0.8 g of orthosilicon A mixed solution of ethyl acetate and 0.8 g of zinc stearate. Soak and heat to 80°C for 20 minutes; 2) Wind the iron-nickel alloy strip (national standard 1j79) with a thickness of 50 microns around the magnetic core (the size is OD30mm*ID24mm*HT10mm), and dilute it 10 times with The final sodium silicate solution, that is, a sodium silicate solution with a mass concentration of 1%, was soaked for 5 minutes, and then baked at 300°C for 30 minutes. 3) Put 20g of treated amorphous alloy powder into the mold cavity of OD40mm*ID15mm*HT14mm. 4) Put the metal winding magnetic core prepared in ...

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Abstract

The invention discloses a preparation method of novel amorphous magnetic powder core. Amorphous alloy powder particles are used as a raw material. The preparation method is characterized by comprising the following steps of 1) pre-processing the amorphous alloy powder particles; 2) performing thermal treatment on a metal soft magnetic strip; 3) preparing a first product of the amorphous magnetic powder core; 4) preparing a processed product of the amorphous magnetic powder core; and 5) preparing the novel amorphous magnetic powder core. The preparation method is used for preparing the magnetic core; and compared with an existing method for preparing the magnetic core, the preparation method has the advantages that the transient loss of a large current is reduced, transient impedance is improved, effects of instantaneous on / off of the large current and soft landing are achieved, power utilization equipment is protected, and a power factor of a power supply is improved.

Description

technical field [0001] The invention relates to a magnetic core and a preparation method thereof, in particular to a novel amorphous magnetic powder core and a preparation method thereof. Background technique [0002] Switching power supply is an inseparable electrical equipment in our daily life. Such as PFC power factor correction for switching power supplies in the field of materials engineering and electronics, magnetic devices, etc. From household lighting, air conditioners, TVs, computer power supplies, etc. to office printing copiers, etc. With the increasing shortage of energy at home and abroad, the problem of environmental pollution is becoming more and more serious, the requirements for energy saving and consumption reduction of electrical equipment are getting higher and higher, and the requirements for the efficiency of power supply are also getting higher and higher. [0003] There are two main problems in the existing switching power supply: one is that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153
CPCH01F1/15316H01F1/15341
Inventor 毛圣华皮金斌张勉团
Owner JIANGXI AITE MAGNETS
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