• Title/Summary/Keyword: 차동모드

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Differential mode noise modeling and verification of single phase inverter for BESS (BESS용 단상 인버터의 차동모드 노이즈 모델링 및 검증)

  • Kim, Woojung;Cha, Hanju
    • Proceedings of the KIPE Conference
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    • 2019.07a
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    • pp.224-226
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    • 2019
  • 본 논문은 BESS용 단상 인버터의 입력에 영향을 미치는 차동모드 노이즈에 대한 모델링을 제안하였으며, 이를 시뮬레이션으로 구현하였다. 이 방법은 적절한 노이즈원과 전달 임피던스 경로를 통해 구현되고, 단상 인버터의 개발 초기 단계에서 EMI 설계 과정을 최적화하여 개발 비용을 줄이는데 도움이 될 수 있다. 노이즈원 전류는 단상 인버터의 IGBT 스위칭에 대하여 모델링하였고, 차동모드 등가 회로를 통해 임피던스 경로를 해석하여 이 두 값의 곱으로 입력에 영향을 주는 차동 모드의 노이즈 전압을 도출하였다. 차동모드 노이즈의 모델링을 시뮬레이션과 실험의 비교를 통해 검증하였다.

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A Variable Leakage Inductance Common-Mode Choke (누설인덕턴스 가변형 공통모드 초크코일)

  • Baek, Mi-Ran;Kim, Hee-Seung;Won, Jae-Sun;Ju, Jae-Chul;Oh, Dong-Sung;Han, Sang-Kyoo;Hong, Sung-Soo
    • Proceedings of the KIPE Conference
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    • 2011.07a
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    • pp.402-403
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    • 2011
  • EMI 필터 설계 시 주로 사용되는 공통모드 초크의 경우 자화 인덕턴스로부터 공통모드 노이즈 감쇠를, 누설 인덕턴스로부터 차동모드 노이즈 감쇠를 기대할 수 있다. 이때, 누설인덕턴스가 너무 클 경우 차동모드 노이즈 감쇠에는 우수하지만, 전기/전자제품이 슬림화됨에 따라 공통모드 초크의 누설 자속과 전원공급기를 덮고 있는 금속덮개 사이에 자계 간섭에 의한 진동/소음문제가 발생될 수 있다. 본 논문에서는 누설자속을 조절할 수 있는 공통모드 초크의 코어형상 및 권선기법을 제안한다. 제안된 방법은 진동 및 소음을 제어할 수 있는 장점을 지니고 있다.

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Design of Single-Inductor Dual-Output Boost-Boost DC-DC Converter with Dual Feedback Loop Based on Relative Sawtooth Generator (Dead-time을 갖는 톱니파 발생기를 이용한 이중 피드백 루프 기반 단일 인덕터 이중 출력 승압형 변압기 설계)

  • Yun, Dam;Kim, Dong-Young;Lee, Kang-Yoon
    • Journal of IKEEE
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    • v.18 no.2
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    • pp.220-227
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    • 2014
  • This paper presents a control method of Single-Inductor Dual-Output DC-DC Converter using Common mode feedback and differential feedback loops. To generate duty used for differential mode feedback loop, this paper propose relative sawtooth circuit using current divider circuit which makes ramp signal with variable dead-time. Two outputs of the Single-Inductor Dual-Output DC-DC Converter are specified for 2.8 V and 4.2 V with input voltage 2.5 V. The maximum conversion efficiency of designed SIDO DC-DC Converter is 95% at total output power of 539mW. Cross regulations of Boost1 and Boost2 are 3.57% and 4% each, when increasing twice times output current.

Common-Mode Suppression Balanced Filter based on Composite Right/Left-Handed Transmission Line (CRLH 전송선로를 이용한 공통 모드 억압 평형 필터)

  • Kim, Young;Yun, Jeong-Ho;Yoon, Young-Chul
    • Journal of Advanced Navigation Technology
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    • v.15 no.4
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    • pp.571-577
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    • 2011
  • This paper presents a novel balanced filter design based on a metamaterial structure applicable to differential-mode excitation. The metamaterial structure is based on a unit-cell which under a differential-mode excitation behaves like composite right/left-handed(CRLH) metamaterial with filter characteristics. In contrast, the metamaterial unit-cell is below cut-off under a common-mode excitation. Experimental results are used to verify the proposed metamaterial's differential-mode characteristics. The metamaterial is fabricated with a balanced filter design resulting in an operating frequency range of 960~1000 MHz with a insertion loss of 4.1 dB.

Method for High-Frequency Modeling of Common-Mode Choke (공통모드 초크의 간단한 고주파 모델링 기법)

  • Jung, Hyeonjong;Yoon, Seok;Kim, Yuseon;Bae, Seok;Lim, Yeongseog
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.12
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    • pp.964-973
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    • 2017
  • In this paper, we analyze the effects of parasitic components of common-mode choke on the common mode and differential mode in a wide band, and we propose a simple method for high-frequency modeling. Common mode and differential mode 2-port networks were configured and the S-parameters in each mode were measured using a network analyzer. Equivalent circuit elements were extracted from the measured results to model a high-frequency equivalent circuit, and the validity was verified by comparing the measured S-parameters with the simulation results.

Design and Fabrication of Broad-Band EMC Filter for Power Line (전원선에서의 광대역 EMC 필터의 설계 및 제작)

  • Kim, Dong-Il;Ku, Dong-Woo;Yang, Eun-Jung;Kim, Do-Yearn;Yea, Byeong-Dok
    • Journal of Navigation and Port Research
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    • v.26 no.5
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    • pp.525-528
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    • 2002
  • The proposed EMC filter composed with feed-through capacitors and ferrite beads of high permeability was prepared which satisfy the EMC standard for a wide-band noise signal in the frequence of 10 MHz to 1.5 GHz in power supply line. The optimum structure of ferrite bead was found by calculating the load effect of ferrite beads. As a result, the filter showed excellent differential- and common-mode noises filtering characteristics above 30dB in the frequency band from 10 MHz to 1.5 GHz. The immunity characteristics are improved more than 10 to 30 dB over the frequency band from DC to 1.8GHz.

EMI filter의 감쇄 성능 예측을 위한 소자의 공통 및 차동 모드 모델링 기법

  • Kim, Hui-Seung;Baek, Mi-Ran;Won, Do-Hyeon;Hong, Seong-Su;No, Jeong-Uk;Han, Sang-Gyu;Won, Jae-Seon;O, Dong-Seong
    • Proceedings of the KIPE Conference
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    • 2010.07a
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    • pp.464-465
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    • 2010
  • EMI 감쇄성능의 정확한 예측을 위해서는 EMI 필터에 사용되는 소자에 대한 명확한 공통 및 차동 모드 임피던스 모델 정보가 필요하다. 하지만 기존의 전도성 EMI 감쇄성능 예측 방식은 이러한 모델의 부재로 인해 고주파수에서 예측 값과 실험 결과에 큰 오차가 발생하는 문제점이 있다. 이를 해결하기 위해 본 논문에서는 일반적으로 사용되는 EMI 필터의 소자를 전도성 전파 규제 범위에서 모델링하고 이를 이용하여 공통 및 차동모드 임피던스로 다시 모델링한다. 실험 결과 EMI 감쇄성능을 1MHz 이하의 영역에서만 예측할 수 있었던 기존 방식과 비교해 제안 방식은 10MHz 영역까지 예측할 수 있는 장점이 있다. 최종적으로 임피던스 분석기를 이용한 측정 결과와 모의실험 결과를 제시하여 제안 방식의 타당성 및 유용성을 검증한다.

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Dual-Mode Balanced Filter in Symmetric Composite Right/Left-Handed Transmission Line Structure (CRLH 전송선로 대칭구조의 이중모드 평형 필터)

  • Kim, Young;Sim, Seok-Hyun;Yoon, Young-Chul
    • Journal of Advanced Navigation Technology
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    • v.17 no.2
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    • pp.196-201
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    • 2013
  • In this paper, a dual-mode balanced filter with symmetric coupled composite right/left-handed transmission line is introduced. Unlike the other symmetric structure, this configuration has the ability to operate under both common- and differential-mode excitation. These properties are achievable through providing physical short circuit by means of ground vias at the center of each unit-cell along the symmetry plane of the structure. Because the CRLH unit-cells are operated under both common- and differential-mode excitation, we implemented a balanced filter using these properties. To validity these features, a five-cell four port coupled CRLH-TL is simulated, fabricated and measured and the obtained performances agree with the simulation results under both common- and differential-mode excitation.

Satellite Battery Cell Voltage Monitor System Using a Conventional Differential Amplifier (종래의 차동증폭기를 사용한 인공위성 배터리 셀 전압 감시 시스템)

  • Koo, Ja-Chun;Choi, Jae-Dong;Choi, Seong-Bong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.2
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    • pp.113-118
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    • 2005
  • This paper shows a satellite battery cell voltage monitor system to make differential voltage measurements when one or both measurement points are beyond voltage range allowed by a conventional differential amplifier. This system is particularly useful for monitoring the individual cell voltage of series-connected cells that constitute a rechargeable satellite battery in which some cell voltages must be measured in the presence of high common mode voltage.

A Method for Reducing the Residual Voltage of Hybrid SPD Circuit Using Choke Coil (초크코일을 이용한 SPD 조합회로의 잔류전압 저감기법)

  • Cho, Sung-Chul;Eom, Ju-Hong;Lee, Tae-Hyung
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.21 no.8
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    • pp.96-101
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    • 2007
  • Gas Discharge Tubes (GDTs) are widely used as surge protectors for communication applications due to their small internal capacitance. In these days, however, they are mostly used in combined configurations, because the sparkover voltage required to initiate the discharge process in the GDTs and the time taken for arc formation process can be large enough to damage to sensitive circuits. For GDTs with a considerably high initial residual voltage, we should limit the peak voltage using a TVS or filter. We made a hybrid SPD circuits of common-mode type and differential-mode type with the filter using common-mode choke. Also, we applied lightning impulse voltage and ring wave voltage which frequency bandwidth are different each other and verified the characteristics of hybrid SPD circuits according to waveshapes. We describe how the applied SPDs operate in protection process steps with the actual data obtained from the residual voltage measurement at each step. The experiment results show that the surge voltage reduction with the choke coil is more effective in differential-mode circuit than in common-mode circuit.