• Title/Summary/Keyword: circuit modeling

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

  • 이신영;손경주;최우신;이해영
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.12
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    • pp.1276-1282
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    • 2003
  • The SMT(Surface Mount Type) ferrite bead used to reduce the influx of power bus noise is modeled with parallel capacitor(C), series resistor(R) and series inductor(L). The simple equivalent circuit modeling doesn't agree with the measurement result. In this paper, we proposed the accurate equivalent circuit model of the ferrite bead at wide frequency range(50 MHz∼3 GHz) and analyzed the noise effect to the high speed IC(Integrate Circuit) with ferrite bead or not.

Transient Voltage Analysis of Low-Voltage Source Circuit inn Thermal Power Plant due to Grounding Potential Rise by Lightening (낙뢰침입에 의한 대지전위상승이 발전소 저압전원회로에 미치는 과전압 해석)

  • Yang, Byeong-Mo;Jeong, Jae-Kee;Min, Byeong-Wook;Lee, Jong-Seok
    • Proceedings of the KIEE Conference
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    • 1998.07e
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    • pp.1644-1646
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    • 1998
  • High-Smokestacks have been the symbol of the thermal power plant. Those cause the thermal power plant to be damaged by lightening for reaching several hundreds meter. In this paper, we investigated the accident of low-voltage source circuit due to grounding potential rise by lightening via high-smokestack in practically driving power plant, described examination into the cause and the impulse analysis. We analysed the transient voltage by EMTP(ElectroMagnetic Transient Program) via modeling the grounding system of power plant. This theoretical results coincided with practical accidental state. Therefore, it was verified that we could apply the grounding system of power plant and substation with the distribution-circuit analysis(EMTP).

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Dynamic Characteristics Test and Test Model Establish on Double Circuit for Protective Relay Test Using Real Time Digital Simulator (송전선보호계전기 시험을 위한 RTDS센서의 2회선 송전선로 Model구축 및 동특성시험)

  • Jung, Chang-Ho;Lee, Jae-Gyu;Yoon, Nam-Seon;Ahn, Bok-Shin;Kim, Sok-Il
    • Proceedings of the KIEE Conference
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    • 1997.07c
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    • pp.1038-1040
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    • 1997
  • This paper describes dynamic characteristics test of distance relay and current differential relay using Real Time Digital Simulator on double circuit transmission line. First, The double circuit T/L modeling on RTDS was proposed and the results from the proposed model were compared with those of PSS/E. This comparison shows the possibility of dynamic test using the RTDS. The relay included about 20 test items which are apt to include maloperation of protective relays in critical situations.

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A 90°-Bent Spur-Line Combined CRLH ZOR Bandpass Filter for the Channel of the UWB Communication System

  • Lee, Changhyeong;Kahng, Sungtek
    • Journal of Electrical Engineering and Technology
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    • v.13 no.2
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    • pp.928-935
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    • 2018
  • In this paper, a compact fully printable bandpass filter is suggested for a low-frequency channel 3.2 GHz ~ 3.7 GHz in the Ultra-Wideband (UWB) communication system. It is featured with a small geometry of $0.5{\lambda}_g/15$ and a low insertion loss despite using FR4 as a cheap substrate of a high dielectric loss. This is made possible by generating zeroth-order-resonance (ZOR) from one cell comprising two series resonances obviously separated from one shunt resonance as a third-order bandpass filter. Especially, the series resonance elements are combined with spur-lines bent by 90 degrees, which makes the port-impedance matched well and eliminates spurious hikes in the stopband, while the overall size remains almost unchanged. The design is carried out by setting up the equivalent circuit and the circuit simulation is checked by the full-wave EM analysis. The structure is manufactured and measured to show that the circuit modeling and EM simulation results agree with the measured data.

Simplified Modeling of Ring Resonators and Split Ring Resonators Using Magnetization

  • Jeon, Dongho;Lee, Bomson
    • Journal of electromagnetic engineering and science
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    • v.13 no.2
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    • pp.134-136
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    • 2013
  • This paper examines various aspects of the electromagnetic responses of the ring resonator located in the transverse electromagnetic cell. In addition, an equivalent circuit for the ring resonator is proposed and analyzed based on the electromagnetic phenomenon of the resonator. The equivalent circuit was simply modeled based on the concept of magnetization. A method for achieving a wider operating bandwidth of the negative permeability is provided. The ring resonator with its resonant frequency of 13.56 MHz was designed and its characteristics were examined in terms of S-parameters, effective permeability, loss rate, bandwidth, etc. The circuit and electromagnetic simulation results show an excellent agreement as well as that of theory.

Performance analysis and Design of self-excited Induction Generators considering output voltage (출력 특성을 고려한 단상 자기여자 유도 발전기의 특성 해석)

  • Kim, Cherl-Jin;Lee, Kwan-Yong;Cho, Young-Rae;Baek, Soo-Hyun
    • Proceedings of the KIEE Conference
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    • 2005.04a
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    • pp.76-79
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    • 2005
  • This paper describes the performance analysis and design of 1-phase self-excited induction generators. The minimum parallel capacitance of self-excited capacitor connected auxiliary winding and the series capacitance of regulating voltage capacitor connected main winding is proposed the suitable value using circuit equations of main and auxiliary winding. For the steady state analysis, the equivalent circuit of 1-phase induction generators is used as circuit modeling using the double-revolving field theory. The validity of designed generator system will be confirmed by experimental and computed results.

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Torque Analysis of Rotary Actuator Using Equvalent Magnetic Circuit method in combination with finite element method (등가자기회로법과 유한요소법을 이용한 액츄에이터의 토크특성 해석)

  • Kim, Young-Kyoun;Hong, Jung-Pyo;Kim, Je-Deok
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.605-607
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    • 2000
  • Although Equvalent Magnetic Circuit (EMC) method. Using lumped parameter and numerical analysis method are widely used for electric machine analysis. these are neither always accurate enough nor sometimes available to easily use. Moreover three dimensional finite element method (3D-FEM) is inherently unsuitable for electric machine performance evaluation due to its poor computational efficiency, such as too long calculation time and difficulty in modeling for analysis. In this paper, Nonlinear Equivalent Magnetic Circuit (NEMC) method in combination with 2D-FEM is proposed to analyze the electric machine requiring 3D-FEM, and this method applys to torque evaluation for rotary actuator of Electro Magnetic Electronic Controller Power Steering (EM-ECPS).

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Macromodel for Short Circuit Power and Propagation Delay Estimation of CMOS Circuits

  • Jung, Seung-Ho;Baek, Jong-Humn;Kim, Seok-Yoon
    • Proceedings of the IEEK Conference
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    • 2000.07b
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    • pp.1005-1008
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    • 2000
  • This paper presents a simple method to estimate short-circuit power dissipation and propagation delay for static CMOS logic circuits. Short-circuit current expression is derived by accurately interpolating peak points of actual current curves which is influenced by the gate-to-drain coupling capacitance. The macro model and its expressions estimating the delay of CMOS circuits, which is based on the current modeling expression, are also proposed after investigating the voltage waveforms at transistor output modes. It is shown through simulations that the proposed technique yields better accuracy than previous methods when signal transition time and/or load capacitance decreases, which is a characteristic of the present technological evolution.

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RE circuit simulation for high-power LDMOS modules

  • fujioka, Tooru;Matsunaga, Yoshikuni;Morikawa, Masatoshi;Yoshida, Isao
    • Proceedings of the IEEK Conference
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    • 2000.07b
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    • pp.1119-1122
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    • 2000
  • This paper describes on RF circuit simulation technique, especially on a RF modeling and a model extraction of a LDMOS(Lateral Diffused MOS) that has gate-width (Wg) dependence. Small-signal model parameters of the LDMOSs with various gate-widths extracted from S-parameter data are applied to make the relation between the RF performances and gate-width. It is proved that a source inductance (Ls) was not applicable to scaling rules. These extracted small-signal model parameters are also utilized to remove extrinsic elements in an extraction of a large-signal model (using HP Root MOSFET Model). Therefore, we can omit an additional measurement to extract extrinsic elements. When the large-signal model with Ls having the above gate-width dependence is applied to a high-power LDMOS module, the simulated performances (Output power, etc.) are in a good agreement with experimental results. It is proved that our extracted model and RF circuit simulation have a good accuracy.

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Equivalent Circuit Modeling of Underwater Acoustic Piezoelectric Transducer (수중 음향 압전 트랜스듀서의 등가 회로 모델링)

  • Joh, Chee-Young;Seo, Hee-Seon;Lee, Jung-Min
    • The Journal of the Acoustical Society of Korea
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    • v.15 no.4
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    • pp.77-82
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    • 1996
  • In this paper an identification method is presented to obtain the equivalent electric model of a sandwitch type piezoelectric transducer. Unknown parameters related to the equivalent circuit are identified by solving a nonlinear optimization problem which can minimize an error between the experimental and analytical admittances in air. The proposed method is applied to an example transducer. The validity of equivalent circuit model is demonstrated by the comparison between the experimental measurements and analytical calculations of transmitting voltage response(TVR) and receiving voltage response(RVS).

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