• 제목, 요약, 키워드: ferrite inductor

검색결과 47건 처리시간 0.051초

Optimized Design of Low Voltage High Current Ferrite Planar Inductor for 10 MHz On-chip Power Module

  • Bae, Seok;Hong, Yang-Ki;Lee, Jae-Jin;Abo, Gavin;Jalli, Jeevan;Lyle, Andrew;Han, Hong-Mei;Donohoe, Gregory W.
    • Journal of Magnetics
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    • v.13 no.2
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    • pp.37-42
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    • 2008
  • In this paper, design parameters of high Q (> 50), high current inductor for on-chip power module were optimized by 4 Xs 3 Ys DOE (Design of Experiment). Coil spacing, coil thickness, ferrite thickness, and permeability were assigned to Xs, and inductance (L) and Q factor at 10 MHz, and resonance frequency ($f_r$) were determined Ys. Effects of each X on the Ys were demonstrated and explained using known inductor theory. Multiple response optimizations were accomplished by three derived regression equations on the Ys. As a result, L of 125 nH, Q factor of 197.5, and $f_r$ of 316.3 MHz were obtained with coil space of $127\;{\mu}m$, Cu thickness of $67.8\;{\mu}m$, ferrite thickness of $130.3\;{\mu}m$, and permeability 156.5. Loss tan ${\delta}=0$ was assumed for the estimation. Accordingly, Q factor of about 60 is expected at tan ${\delta}=0.02$.

NiZn 페라이트를 내장한 LTCC 인덕터 및 응용 (An LTCC Inductor Embedding NiZn Ferrite and Its Application)

  • 원유준;김희준
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • v.55 no.10
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    • pp.534-539
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    • 2006
  • An integrated inductor using the low-temperature co-fired ceramics(LTCC) technology for low-power electronics was fabricated. In the inductor NiZn ferrite sheet$({\mu}_r=230)$, was embedded to increase inductance. The inductor has Ag spiral coil with 14 turns$(7turns{\times}2layers)$, a dimension of 0.6mm in width, 10um in thickness, and 0.15mm pitch. To evaluate the inductance, including the parasitic resistance, the fabricated inductor was calculated and measured. It was confirmed that calculated values were very close to the measured values. Finally as an application of the LTCC integrated inductor to low power electronic circuits, a LTCC boost DC/DC converter with 1W output power and up to 0.5MHz switching frequency using the inductor fabricated was developed.

PCB기판에 임베디드 된 페라이트 필름 인덕터 (Embedded Ferrite Film Inductor in PCB Substrate)

  • 배석;마노 야스히코
    • 한국자기학회지
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    • v.15 no.1
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    • pp.30-36
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    • 2005
  • 최근 20년 동안 스핀 스프레이 방법으로 제조된 페라이트 필름이 갖는 여러 가지 우수한 점들이 보고되어 왔다. 기존의 벌크 페라이트 재료와 달리 고주파 특성이 우수하며, $100^{\circ}C$ 이하에서 저온 공정이 가능한 점이 그것이다. 따라서 상기의 방법을 이용하여 micro DC-DC 컨버터용 Ni-Zn 페라이트 인턱터를 제조하였으며, 기판재료는 폴리이미드를 사용하였고, 라미네이션과 비아홀 가공, 도금 공정을 이용하여 임베디드 형태를 완성하였다. 또한 Ni-Zn ferrite는 절연체이므로 다른 절연층을 형성하지 않았다. 제조된 Ni-Zn ferrite 는 약 0.61 T의 포화자화, 약 110의 실수 투자율을 보였고, 인덕터의 특성은 스파이럴 16턴 디자인의 경우 5 MHz에서 1.52 H에 Q-factor 24.3, 정격전류 863 mA였다.

NiZn 페라이트를 내장한 LTCC 인덕터 개발 및 응용 (An LTCC Inductor Embedding NiZn Ferrite and Its Application)

  • 원유준;김희준
    • 대한전기학회:학술대회논문집
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    • pp.939-940
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    • 2006
  • An integrated inductor using the low-temperature co-fired ceramics(LTCC ) technology for low-power electronics was fabricated. In the inductor NiZn ferrite sheet(${\mu}_r=230$), was embedded to increase inductance. The inductor has Ag spiral coil with 14 turns($7turns{\times}2layers$), a dimension of 0.6mm in width, 10um in thickness, and 0.15mm pitch. To evaluate the inductance, including the parasitic resistance, the fabricated inductor was calculated and measured. It was confirmed that calculated values were very close to the measured values. Finally as an application of the LTCC integrated inductor to low power electronic circuits, a LTCC buck DC/DC converter with 1W output power and up to 0.5MHz switching frequency using the inductor fabricated was develop.

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광대역 페라이트 비드 모델을 이용한 IC 전원단의 잡음해석 (Power Bus Noise Analysis on IC using Wide-Band Ferrite Bead Model)

  • 이신영;손경주;최우신;이해영
    • 한국전자파학회논문지
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    • v.14 no.12
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    • pp.1276-1282
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    • 2003
  • SMT 타입의 페라이트 비드(ferrite bead)는 전원단에서 발생되는 잡음(noise)이 회로 소자로 유입되는 것을 막기 위해 사용되는 소자로 병렬 캐패시터(capacitor)와 직렬 인덕터(inductor) 및 저항(resistor)을 이용하여 등가 모델화된다. 이와 같은 간단한 페라이트 비드의 등가 모델은 광대역 범위에서 측정 결과와 일치하지 않는다. 본 논문에서는 광대 역(50 MHz∼3 GHz)에서 정확한 페라이트 비드의 모델을 제시하고 페라이트 비드가 있을 때와 없을 때 전원단 잡음의 회로 소자에 미치는 영향을 고찰하였다.

Inductor Design Method of DCM Interleaved PFC Circuit for 6.6-kW On-board Charger

  • You, Bong-Gi;Lee, Byoung-Kuk;Kim, Dong-Hee
    • Journal of Electrical Engineering and Technology
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    • v.12 no.6
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    • pp.2247-2255
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    • 2017
  • Because the on-board charger (OBC) is installed in electric vehicles (EVs), high power density is regarded as a key technology. Among components of the OBC, inductors occupy more than 30% of the total volume. Thus, it is important to reduce the volume and the weight of inductors while maintaining thermal stability. Discontinuous conduction mode (DCM) can satisfy these requirements; however, only a few studies have adopted the DCM operation for OBCs because of the large inductor current ripple. In this paper, a design process is proposed for application of the DCM operation to OBCs. In order to analyze the inductor losses accurately, a numerical formula for the inductor current ripple is deduced based on a detailed analysis. Two inductors are fabricated using several ferrite cores and powder cores taking into consideration the inductor size, inductor losses, and temperature rise. In order to verify the analysis and design process, experimental results are presented that show that the designed inductors satisfy the requirements of the OBCs.

칩인덕터용 NiCuZn-ferrites 나노 분말합성 및 하소 온도에 따른 특성 변화 (Synthesis of Nano-sized NiCuZn-ferrites for Chip Inductor and Properties with Calcination Temperature)

  • 허은광;김정식
    • 한국세라믹학회지
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    • v.40 no.1
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    • pp.31-36
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    • 2003
  • 본 연구에서는 칩 인덕터용 코어 소재로 사용되는 NiCuZn-ferrite를 공침법을 이용하여 나노크기의 초미세 분말로 합성하고, 합성된 NiCuZn-ferrite의 하소 온도에 따른 저온소결 특성 및 전자기적 특성에 관하여 고찰하였다. 조성은 (N $i_{0.4-X}$C $u_{x}$Z $n_{0.6}$)$_{1+w}$(F $e_2$ $O_4$)$_{1-w}$에서 x 값을 0.2, w 값은 0.03으로 고정하였고, 하소는 30$0^{\circ}C$에서 7$50^{\circ}C$의 온도범위에서 진행하였다. 하소 후 90$0^{\circ}C$에서 소결한 시편의 특성을 측정한 결과, 공침법으로 합성한 NiCuZn-ferrite는 90$0^{\circ}C$의 저온에서 소결밀도 4.90g/㎤, 초기투자율 164, Q-factor 72임을 확인하였다. 또한, NiCuZn-ferrite의 미세구조는 하소온도가 증가함에 따라 입자가 커지고 불균일한 상태가 되며, 초기투자율 등의 ferrites의 전자기적 특성이 저하되었다.되었다.

제조 공정 Parameter에 따른 NiCuZn Ferrite의 투자율과 $Q_{max}$ 주파수 변화 (The Variation of Permeability and$Q_{max}$ Frequency with Processing Parameters in NiCuZn Ferrites)

  • 신재영;박지호;박진채;한종수;송병무
    • 한국자기학회지
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    • v.7 no.1
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    • pp.19-24
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    • 1997
  • 적층형 chip inductor 소재인 NiCuZn ferrite의 제조 공정 조건 및 조성을 선정하였다. NiCuZn ferrite의 NiO 함량이 증가할 수록 저온 소결에 필요한 Fe$_{2}$O$_{3}$ 결핍량은 점차 증가하였고, NiO 함량과 Co$_{3}$O$_{4}$ 첨가량을 변화하여 투자율을 12 ~ 562 범위에서 제어할 수 있었다. NiCuZn ferrite의 투자율이 562에서 60으로 변화함에 따라서 Q$_{max}$ 주파수는 3 MHz에서 50 MHz 범위로 제어할 수 있었다. 이때 Q$_{max}$ 주파수(Y)와 투자율(X)은 log Y = 4.2-1.4 log X의 상관관계를 나타내었다.

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Phase Shift Full Bridge Converter for Sever Power using a New Separated Leakage Inductor Winding (SLW) Method

  • Cho, Kyu-Min;Kim, Young-Do;Cho, In-Ho;Moon, Gun-Woo
    • 전력전자학회:학술대회논문집
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    • pp.517-519
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    • 2008
  • A new transformer winding method is proposed in this paper. Generally, PWM ZVS topologies use a leakage inductor to achieve ZVS operation. However, the leakage inductance of the transformer is not often enough to meet ZVS condition. Therefore, an additional leakage inductor is necessary, which causes large core loss because high input voltage is applied to the additional leakage inductor during a short commutation period. In this paper, a new separated leakage inductor winding (SLW) method is proposed. With the proposed winding method, a leakage inductor and a transformer can be combined in one ferrite core. Therefore, size and core loss of the additional leakage inductor can be reduced. Experimental results demonstrate that the proposed winding method can achieve a significant efficiency improvement in a 1210.8W (12V, 100.9A) prototype converter.

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