KR20130051221A - Ferrite core for electronic components - Google Patents

Ferrite core for electronic components Download PDF

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KR20130051221A
KR20130051221A KR1020110116442A KR20110116442A KR20130051221A KR 20130051221 A KR20130051221 A KR 20130051221A KR 1020110116442 A KR1020110116442 A KR 1020110116442A KR 20110116442 A KR20110116442 A KR 20110116442A KR 20130051221 A KR20130051221 A KR 20130051221A
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core
ferrite core
ferrite
electronic component
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황득규
전용
이기양
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현대모비스 주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/086—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together sintered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores

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  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)

Abstract

PURPOSE: A ferrite core for an electronic component is provided to implement the miniaturization of a product by reducing the core loss without increasing the size of the ferrite core. CONSTITUTION: The composition of the main materials of a ferrite powder is Fe2O3 70.0~70.6wt%, MnO 22.4~23.0wt%, and ZnO 7.7~6.5wt%, respectively. An addition element added to the main materials is CaO 400~600ppm, and Co3O4 200~400ppm, respectively. The CaO acts as an oxidant in the sintering. The Co3O4 reduces the core loss in the sintering. The core loss value per unit volume of the ferrite core for the electronic component is measured as less than 350kW/m^3 in 25°C, less than 310kW/m^3 in 60°C, less than 290kW/m^3 in 100°C, and less than 350kW/m^3 in 120°C.

Description

전자부품용 페라이트 코어{Ferrite core for electronic Components}Ferrite core for electronic components

본 발명은 전자부품용 페라이트 코어에 관한 것으로, 차량용 저전압DC-DC컨버터와 같은 전원공급부 등에 적용되는 저손실을 위한 전자부품용 페라이트 코어에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ferrite core for electronic components, and more particularly, to a ferrite core for electronic components for low loss applied to a power supply unit such as a low voltage DC-DC converter for a vehicle.

종래 가전제품 및 통신기기에 사용되는 전자부품용 페라이트 코어는 Fe2O3를 주성분으로 하는 산화물계 자성재료인 페라이트 소재를 압축 및 열처리 소결하여 제조되는 소자이다.BACKGROUND ART [0002] A ferrite core for electronic components used in home appliances and communication devices is a device manufactured by compressing and heat-sintering a ferrite material, which is an oxide-based magnetic material containing Fe 2 O 3 as a main component.

이와 같은 종래 페라이트 코어는 변압기 및 인덕터용 자성코어, 즉 Cu 코일의 전류변화에 의해 발생된 자기력선의 통로인 자심 역할을 한다.Such a conventional ferrite core serves as a magnetic core which is a passage of magnetic force lines generated by a current change of a magnetic core for a transformer and an inductor, that is, a Cu coil.

최근 하이브리드자동차(HEV) 및 전기자동차(EV)의 차종개발이 확대되면서, 전원공급장치의 저전압DC-DC컨버터의 메인변압기 및 출력인덕터 등에 적용되는 페라이트 코어의 전기적 특성을 차량의 동작조건에 적합하게 개선하고자 하는 노력이 진행되고 있다.With the recent development of hybrid vehicle (HEV) and EV (EV) models, the electrical characteristics of ferrite cores applied to the main transformer and output inductor of low voltage DC-DC converter of power supply are suitable for the operating conditions of the vehicle. Efforts are being made to improve.

페라이트 코어는 페라이트 소재를 압축 및 소결하여 제조되고, 차량용 저전압 DC-DC컨버터용(Low voltage DC-DC converter) 메인변압기, 출력 인덕터에 사용되는 자성코어 즉, Cu 코일의 전류변화에 의해 발생된 자기력선의 통로(자심) 역할을 한다. 페라이트 소재는 Fe2O3를 주성분으로 하는 산화물계 자성재료이다.Ferrite cores are manufactured by compressing and sintering ferrite materials, and magnetic field lines generated by current changes in the magnetic cores, namely, Cu coils, used in main transformers and output inductors for low voltage DC-DC converters for vehicles. It acts as a passage of self. The ferrite material is an oxide-based magnetic material mainly containing Fe 2 O 3 .

그러나, 가전 및 통신기기에 주로 사용되는 페라이트 코어는 코어의 온도변화에 따른 코어 손실값이 상대적으로 큰 값을 가지므로, 이를 상대적으로 고온 환경에서 동작하는 차량용 저전압 DC-DC컨버터에 적용하는 경우 발열에 의한 성능저하 문제가 발생될 수 있다.However, ferrite cores, which are mainly used in home appliances and communication devices, have a relatively large core loss value due to temperature change of the core, and thus heat generation when applied to a low voltage DC-DC converter for a vehicle operating in a relatively high temperature environment. The performance degradation problem may occur.

이를 해결하는 방법으로 페라이트 코어의 사이즈를 확대하는 방법을 고려할 수 있으나, 이것은 컴팩트한 설계 요구에 부합하지 않은 단점을 가진다.As a solution to this problem, a method of enlarging the size of the ferrite core may be considered, but this does not meet the compact design requirements.

KR 10-2003-0016171, 2003. 02. 26, 페이지 2KR 10-2003-0016171, 2003. 02. 26, page 2

본 발명의 목적은 하이브리드자동차(HEV) 또는 전기자동차(EV)와 같은 차량의 저전압 DC-DC컨버터의 변압기/인덕터용 자성코어에 적합하도록, 페라이트 코어의 사이즈의 증대 없이 종래에 비해 코어 손실값이 상대적으로 감소된 전자부품용 페라이트 코어를 제공하는 것이다.It is an object of the present invention to fit a magnetic core for transformers / inductors of low voltage DC-DC converters in a vehicle such as a hybrid vehicle (HEV) or an electric vehicle (EV). It is to provide a relatively reduced ferrite core for electronic components.

상기 목적을 달성하기 위한 본 발명은 페라이트 분말이 소결되어 제조된 전자부품용 페라이트 코어에 관한 것으로, 본 전자부품용 페라이트 코어의 상기 페라이트 분말은 주재료의 조성이 각각 Fe2O3 70.0~70.6 wt%, MnO 22.4~23.0 wt%, ZnO 7.7~6.5 wt% 이고, 상기 주재료에 첨가되는 첨가원소가 각각 CaO 400~600 ppm, Co3O4 200~400 ppm 인 것을 특징으로 한다.The present invention for achieving the above object relates to a ferrite core for an electronic component manufactured by sintering ferrite powder, the ferrite powder of the ferrite core for the electronic component is a composition of the main material of Fe 2 O 3 70.0 ~ 70.6 wt% , MnO 22.4 ~ 23.0 wt%, ZnO 7.7 ~ 6.5 wt%, the additive elements added to the main material is characterized in that the CaO 400 ~ 600 ppm, Co 3 O 4 200 ~ 400 ppm, respectively.

상기 전자부품용 페라이트 코어의 단위체적당 코어 손실값은, 주파수(f)가 100 kH, 자속밀도(B)가 200mT의 측정조건에서, 25℃에서 350 kW/m3이하, 60℃에서 310 kW/ m3이하, 100℃에서 290 kW/m3이하, 120℃에서 350 kW/m3이하로 측정될 수 있다.The core loss value per unit volume of the ferrite core for electronic components is 350 kW / m 3 or less at 25 ° C. and 310 kW / at 60 ° C. under the measurement conditions of frequency f of 100 kH and magnetic flux density B of 200 mT. m 3 or less, 290 kW / m 3 or less at 100 ° C., 350 kW / m 3 or less at 120 ° C.

상기 CaO는 소결시 산화제역할을 하고, 상기 Co3O4는 소결시 코어 손실값을 작게하는 역할을 할 수 있다.The CaO acts as an oxidizer during sintering, and the Co 3 O 4 may serve to reduce the core loss value during sintering.

상기 전자부품용 페라이트 코어는 차량용 저전압DC-DC컨버터에 적용되는 변압기 또는 인덕터용 자성코어로 이용될 수 있다. The ferrite core for the electronic component may be used as a magnetic core for a transformer or an inductor applied to a low voltage DC-DC converter for a vehicle.

이와 같이 본 발명에 따른 전자부품용 페라이트 코어는 종래의 페라이트 코어에 비해 코어 손실값이 작아 전류에 의한 발열 손실이 감소하므로 보다 안정적인 동작을 구현할 수 있다.As described above, the ferrite core for an electronic component according to the present invention has a smaller core loss value than the conventional ferrite core, thereby reducing heat generation caused by current, thereby achieving more stable operation.

또한, 본 발명에 따른 전자부품용 페라이트 코어는, 페라이트 코어의 사이즈를 크게 하지 않으면서 코어 손실을 감소함으로써 제품의 소형화에 기여할 수 있다.In addition, the ferrite core for an electronic component according to the present invention can contribute to miniaturization of a product by reducing core loss without increasing the size of the ferrite core.

도 1은 본 발명의 일 실시예에 따른 전자부품용 페라이트 코어의 조성비를 나타내는 그래프이다.
도 2는 본 발명의 일 실시예에 따른 전자부품용 페라이트 코어의 시제품 사진이다.1 is a graph showing a composition ratio of a ferrite core for an electronic component according to an embodiment of the present invention.
2 is a prototype photograph of a ferrite core for an electronic component according to an embodiment of the present invention.

이하 첨부된 도면들을 참조하여 본 발명의 일 실시예에 따른 전자부품용 페라이트 코어에 대하여 구체적으로 설명한다.Hereinafter, a ferrite core for an electronic component according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 전자부품용 페라이트 코어의 조성비를 나타내는 그래프이고, 도 2는 본 발명의 일 실시예에 따른 전자부품용 페라이트 코어의 시제품 사진이다.1 is a graph showing the composition ratio of a ferrite core for an electronic component according to an embodiment of the present invention, Figure 2 is a prototype photograph of a ferrite core for an electronic component according to an embodiment of the present invention.

본 실시예에 따른 전자부품용 페라이트 코어(10)는 페라이트 분말이 소결되어 제조된다. 페라이트 분말은, 도 1에 나타난 바와 같이, 페라이트 분말은 주재료의 조성이 각각 Fe2O3 70.0~70.6 wt%, MnO 22.4~23.0 wt%, ZnO 7.7~6.5 wt% 이다.The ferrite core 10 for electronic components according to the present embodiment is manufactured by sintering ferrite powder. Ferrite powder, as shown in Figure 1, the ferrite powder has a composition of the main material of Fe 2 O 3 70.0-70.6 wt%, MnO 22.4-23.0 wt%, ZnO 7.7-6.5 wt%, respectively.

그리고 이 주재료에 첨가되는 첨가원소는 각각 CaO 400~600 ppm, Co3O4 200~400 ppm으로, 소결시 CaO는 산화제역할을 하고, Co3O4는 코어 손실값을 작게 하는 역할을 한다.The additive elements added to the main material are CaO 400-600 ppm and Co 3 O 4 200-400 ppm, respectively, and CaO acts as an oxidant during sintering, and Co 3 O 4 plays a role of reducing core loss.

이와 같이 본 실시예에 따른 조성을 가진 페라이트 분말에 의해 제조된 전자부품용 페라이트 코어(10)는 아래 표 1에 나타난 바와 같이 종래 가전제품 및 통신기기에 사용되는 페라이트 코어에 비해 코어 손실값이 작을 뿐만 아니라 온도의 변화에 따른 코어 손실값의 변화도 작다.As described above, the ferrite core 10 for electronic components manufactured by the ferrite powder having the composition according to the present embodiment has a smaller core loss value than the ferrite core used in conventional home appliances and communication devices, as shown in Table 1 below. In addition, the change of the core loss value with the change of temperature is small.

온도(℃)Temperature (℃) 코어 손실(kW/ m3)Core loss (kW / m 3 ) 종래소재Conventional material 본 실시예에 따른
페라이트 코어(10)According to this embodiment
Ferrite Cores (10) 2525 670670 350350 6060 470470 310310 100100 370370 290290 120120 400400 350350

표 1의 나타난 결과값은 "IWATSU사 B-H analyzer, 모델명: SY-8232)"와 같은 측정장비에 의해 측정된 것으로, 자속밀도(B)가 200 mT, 주파수(f)가 100 kHz 인 측정조건에서 단위 체적당 코어 손실값에 해당한다.The results shown in Table 1 were measured by a measuring instrument such as "IWATSU BH analyzer, model name: SY-8232)". In the measurement conditions with magnetic flux density (B) of 200 mT and frequency (f) of 100 kHz Corresponds to the core loss per unit volume.

표 1에 나타난 바와 같이 본 실시예에 따른 전자부품용 페라이트 코어(10)의 코어 손실값은 25℃에서 350 kW/m3이하, 60℃에서 310 kW/m3이하, 100℃에서 290 kW/m3이하, 120℃에서 350 kW/m3 이하이다.As shown in Table 1, the core loss value of the ferrite core 10 for electronic components according to the present embodiment is 350 kW / m 3 or less at 25 ° C., 310 kW / m 3 or less at 60 ° C., and 290 kW / at 100 ° C. m 3 or less and 350 kW / m 3 or less at 120 degreeC.

이와 같이 본 실시예에 따른 전자부품용 페라이트 코어(10)는 종래의 페라이트 코어에 비해 코어 손실값이 작아 전류에 의한 발열 손실이 감소하므로 보다 안정적인 동작을 구현할 수 있다.As described above, the ferrite core 10 for an electronic component according to the present embodiment has a smaller core loss value than that of the conventional ferrite core, thereby reducing heat generation caused by current, thereby achieving a more stable operation.

또한, 본 실시예 따른 전자부품용 페라이트 코어(10)는, 코어의 사이즈를 크게 하지 않으면서 코어 손실을 감소함으로써 제품의 소형화에 기여할 수 있다.In addition, the ferrite core 10 for an electronic component according to the present embodiment can contribute to miniaturization of a product by reducing core loss without increasing the size of the core.

10: 전자부품용 페라이트 코어10: Ferrite Core for Electronic Components

Claims (4)

페라이트 분말이 소결되어 제조된 전자부품용 페라이트 코어에 있어서,
상기 페라이트 분말은 주재료의 조성이 각각 Fe2O3 70.0~70.6 wt%, MnO 22.4~23.0 wt%, ZnO 7.7~6.5 wt% 이고, 상기 주재료에 첨가되는 첨가원소가 각각 CaO 400~600 ppm, Co3O4 200~400 ppm 인 것을 특징으로 하는 전자부품용 페라이트 코어.In a ferrite core for an electronic component manufactured by sintering ferrite powder,
The ferrite powder has a composition of Fe 2 O 3 70.0-70.6 wt%, MnO 22.4-23.0 wt%, ZnO 7.7-6.5 wt%, respectively, and the additive elements added to the main material are CaO 400-600 ppm, Co, respectively. 3 O 4 A ferrite core for electronic components, characterized in that from 200 to 400 ppm. 제1항에 있어서,
주파수(f)가 100 kH, 자속밀도(B)가 200mT의 측정조건에서, 상기 전자부품용 페라이트 코어의 단위체적당 코어 손실값은, 25℃에서 350 kW/m3이하, 60℃에서 310 kW/m3이하, 100℃에서 290 kW/m3이하, 120℃에서 350 kW/m3이하로 측정되는 것을 특징으로 하는 전자부품용 페라이트 코어.The method of claim 1,
Under measurement conditions of a frequency f of 100 kH and a magnetic flux density B of 200 mT, the core loss value per unit volume of the ferrite core for an electronic component is 350 kW / m 3 or less at 25 ° C and 310 kW / at 60 ° C. m 3 or less, at 100 ℃ 290 kW / m 3 or less, the ferrite core for an electronic component, characterized in that measured at 120 ℃ to below 350 kW / m 3. 제1항에 있어서,
소결시 상기 CaO는 산화제역할을 하고, 상기 Co3O4는 코어 손실값을 작게하는 역할을 하는 것을 특징으로 하는 전자부품용 페라이트 코어.The method of claim 1,
The sintered CaO acts as an oxidant, and Co 3 O 4 serves to reduce the core loss value. 제1항에 있어서,
상기 전자부품용 페라이트 코어는 차량용 저전압DC-DC컨버터에 적용되는 변압기 또는 인덕터용 자성코어로 이용되는 것을 특징으로 하는 전자부품용 페라이트 코어.The method of claim 1,
The ferrite core for an electronic component is a ferrite core for an electronic component, characterized in that used as a magnetic core for a transformer or an inductor applied to a low voltage DC-DC converter for a vehicle.
KR1020110116442A 2011-11-09 2011-11-09 Ferrite core for electronic components KR20130051221A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102101715B1 (en) 2019-09-23 2020-04-20 한국단자공업 주식회사 Ferraite core module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102101715B1 (en) 2019-09-23 2020-04-20 한국단자공업 주식회사 Ferraite core module

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