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Magnetic material for light emitting diode (LED) illumination control circuit

A technology of LED lighting and magnetic materials, applied in the direction of magnetic materials, circuits, magnetic objects, etc.

Active Publication Date: 2013-03-20
SHANDONG ZHONGRUI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, due to the above materials, although the saturation flux density is high at 100°C, the initial permeability is still relatively high due to the high power consumption of the core. Low, thus affecting the use of this ferrite material in more occasions, to be precise, it cannot be applied to small-sized, high-power LED drive power supplies (in order to reduce the size of the power supply, the circuit operating frequency is higher, and to transmit larger Power, choke coils and transformers work in a state of high magnetic flux density, and at the same time there is a large current passing through the choke coil)

Method used

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  • Magnetic material for light emitting diode (LED) illumination control circuit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: formula (mol ratio) by main component: Fe 2 o 3 : 59.8mol%, ZnO: 10.8mol%, MnO: 31mol%, weigh Fe 2 o 3 , Mn 3 o 4 and ZnO. Put it into a sand mill pre-added with deionized water for grinding, the water content of the slurry is 40%, and the sanding time is 0.5 hours. After the slurry is sprayed and granulated once, it is pre-fired with an electric heating rotary kiln at 850 degrees. Then the calcined material is put into a sand mill with deionized water in advance for secondary sand milling, the water content of the slurry is 30%, and relative to the main component content in the sand milling process, K 2 CO 3: 0.03wt%, Y 2 o 3 : 0.05wt%, CaO: 0.08wt%, SiO 2 : 0.015wt%, in addition, also added MgO: 0.1wt%, V 2 o 5 : 0.035wt%, CoO: 0.25wt%, the sanding time is 1.5 hours, and the average grain size of sanding is controlled to be 1.1±0.3 μm. Finally, secondary spraying is carried out to obtain MnZn ferrite particle powder. Take the pellets and pre...

Embodiment 2

[0044] Embodiment 2: formula (mol ratio) by main component: Fe 2 o 3 : 60.5mol%, ZnO: 10.5mol%, MnO: 29.0mol%, weigh Fe 2 o 3 , Mn 3 o 4 and ZnO. Put it into a sand mill pre-added with deionized water for grinding, the water content of the slurry is 40%, and the sanding time is 0.5 hours. After the slurry is sprayed and granulated once, it is pre-fired with an electric heating rotary kiln at 880 degrees. Then the calcined material is put into a sand mill with deionized water in advance for secondary sand milling, the water content of the slurry is 30%, and relative to the main component content in the sand milling process, K 2 CO 3 : 0.12wt%, Y 2 o 3 : 0.03wt%, CaO: 0.10wt%, SiO 2 : 0.01wt%, in addition, Nb is also added 2 o 5 : 0.03wt%, ZrO 2 : 0.02wt%, CoO: 0.25wt%, in addition, also added, the sanding time was 1.5 hours, and the average particle size of the sanding was controlled to be 1.1±0.3 μm. Finally, secondary spraying is carried out to obtain MnZn ferrit...

Embodiment 3

[0047] Embodiment 3: formula (mol ratio) by main component: Fe 2 o 3 : 61.5mol%, ZnO: 11.5mol%, MnO: 27.0mol%, weigh Fe 2 o 3 , Mn 3 o 4 and ZnO. Put it into a sand mill pre-added with deionized water for grinding, the water content of the slurry is 40%, and the sanding time is 0.5 hours. After the slurry is sprayed and granulated once, it is pre-fired with an electric heating rotary kiln at 900 degrees. Then the calcined material is put into a sand mill with deionized water in advance for secondary sand milling, the water content of the slurry is 30%, and relative to the main component content in the sand milling process, K 2 CO 3 : 0.04wt%, Y 2 o 3 : 0.10wt%, CaO: 0.15wt%, SiO 2 : 0.035wt%, in addition, also added MgO: 0.30wt%, V 2 o 5 : 0.05wt%, ZrO 2 : 0.04wt%, the sanding time is 1.5 hours, and the average grain size of the controlled sanding is 1.1±0.3 μm. Finally, secondary spraying is carried out to obtain MnZn ferrite particle powder. Take the pellets an...

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Abstract

The MnZn ferrite material comprises principal components and auxiliary components. The principal components contain Fe2O3 59.5~61.8mol%, ZnO 9~12mol% and balance MnO. The auxiliary components comprise K2CO3, Y2O3, CaO and SiO2. Said auxiliary components may further comprise two or more components selected from MgO, V2O5, CoO, Nb2O5 and ZrO2.The content of auxiliary components relative to the total amount of principal components are as follows: K2CO3 0.01~0.15wt%, Y2O3 0.008~0.10wt%, CaO 0.01~0.25wt%, SiO2 0.005~0.055wt%, MgO 0.005~0.50wt%, V2O5 0.005~0.06wt%, CoO 0.01~0.50wt%, Nb2O5 0.005~0.08wt%, ZrO2 0.005~0.055wt%. Said ferrite material has permeability of 1500±25% at 25?, saturated magnetic flux density of more than 500mT at 100?, power consumption of less than 620mW / cm3 at 100? and 100KHz×200mT.

Description

technical field [0001] The invention relates to a magnetic material for an LED lighting control circuit and a preparation method thereof. Background technique [0002] LED lighting needs to work under DC conditions, so a driving power supply is required, and in the design of various control circuits (also known as driving circuits), choke coils are usually used, which are magnetic cores made of magnetic materials and Composed of coils wrapped around it. The choke coil is a key component of the drive circuit, and its performance directly determines whether the LED lighting can work normally. [0003] As the choke coil of the drive circuit, its working circuit often contains both AC and DC components. Sometimes the LED drive power supply is installed in the lamp, and its ambient operating temperature is relatively high, sometimes reaching 100°C or even higher. In order to ensure that the LED can work normally, it is required that the choke coil of the driving circuit should ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36C04B35/26C04B35/64
CPCC04B2235/3239C04B2235/3206C04B2235/3201C04B35/6263C04B35/2658C04B2235/664C04B2235/6584C04B35/62695C04B35/62685C04B2235/3262C04B2235/3418H01F1/344C04B2235/3284C04B2235/3208C04B2235/5481C04B2235/3251C04B2235/72C04B2235/6565C04B2235/6562C04B2235/604C04B2235/3263C04B35/6262C04B2235/5436C04B2235/3225H01F1/36C04B2235/3275C04B2235/3244
Inventor 陆明岳
Owner SHANDONG ZHONGRUI ELECTRONICS