• 제목/요약/키워드: Electrical characteristic

검색결과 4,875건 처리시간 0.031초

공진특성을 이용한 DC-DC Converter에 관한 연구 (A stusdy on DC-DC Converter using characteristic of series resonance)

  • 노채균;김성철;배진호;신동삼
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1990년도 하계학술대회 논문집
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    • pp.383-386
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    • 1990
  • This paper concerns a DC-DC converter using the characteristic of series resonance. Operation principle of the system described by the proposed equation is illustrated. Characteristics of steady state of the system which is essential to system design is evaluated for frequency and pulse width characteristic using dimensionless parameter. The proposed circuit based in constant voltage control uses the Pulse Width Modulation - Time Ratio Control method.

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초음파 전달특성과 신경망을 이용한 효과적인 부분방전 위치 추정 (Effective Location Estimation of Partial Discharge Using Ultrasonic Signal's Propagation Characteristic and Neural Network)

  • 서인철;김재철;전영재;김영노
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 하계학술대회 논문집 A
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    • pp.467-469
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    • 2001
  • This paper presents an efficient location estimation methodology for a partial discharge(PD) source in the power transformer. The methodology previously proposed is not suitable for locating a PD source because the ultrasonic signal with medium attenuated through the inner structure. In general, the propagation characteristic of ultrasonic signal with medium is different. Therefore, using this propagation characteristic, we can detect the location of PD source. In this paper, the proposal algorithm finds the PD source using three sensors attached to one side of the transformer without attenuation of the ultrasonic signal and applying the neural network based geometrical method. The proposed methodology demonstrates the effectiveness and validity on an experimental transformer.

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유한요소법과 등가회로 해석의 결합에 의한 콘덴서 구동형 단상유도전동기의 특성해석 (Characteristic Analysis of Capacitor-Run Single Phase Inuction Motor by Equivalent Circuit Coupled with Finite Element Method)

  • 남혁;하경호;강규홍;홍정표;정승규
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.837-839
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    • 2000
  • Capacitor-run single induction motors have the unbalanced elliptic rotating magnetic field so that it is difficult to analyze the characteristic and calculate the accurate slot leakage reactance of the rotor with the closed slot by using the lumped parameter. In this paper, the characteristic is analyzed by the symmetrical coordinate method in terms of the lumped parameter coupled with the numerical analysis. The secondary parameters are calculated by the one slot pitch boundary condition applying to Finite Element Method (FEM). The analysis results are compared with experimental ones.

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전력 TFT 소자의 제작과 전기적인 특성 (Fabrication of Power TFT Devices and Electrical Characteristics)

  • 이우선;정용호;김남오
    • 한국전기전자재료학회논문지
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    • 제11권10호
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    • pp.790-795
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    • 1998
  • Fabrication of inverted staggered power TFT devices and electrical characteristic were investigated. 16 fingers with drain and source electrode of TFT and 100V output voltage were designed successfully. It is observed that as $V_g$ increased, $I_d$ increase exponentially. Because of localized deep states of a-Si, $I_d$ shows irregular variation at low voltage. Output and transfer characteristic showed the same as typical variation. But electrical characteristic strongly depend on the channel length and thickness of silicon nitride and amorphous silicon.

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3D EMCN을 이용한 양측식 가동 코일형 LDM의 특성 해석 (Characteristic Analysis of Linear DC motor by Using 3 Dimensional Equivalent Magnetic Circuit Network)

  • 염상부;하경호;홍정표;김규탁
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.876-878
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    • 2000
  • In this paper, the characteristic of the Linear DC motor(LDM) are analyzed by using 3 Dimensional Equivalent Magnetic Circuit Network (3D EMCN), the movement of mover substitutes for the movement of magnetization in permanent magnet expressed by Fourier series, thrust characteristic analysis is performed and the appropriateness of analysed result is verified by comparing with the results of 2 Dimensional Finite Element Method (2D FEM) and experiment.

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해석적 방법을 이용한 양측식 선형 영구자석 발전기의 특성해석 (Characteristic Analysis of Double sided Permanent Magnet Linear Generator by using Analytical Method)

  • 강한빛;최장영;김경환;홍기용
    • 전기학회논문지
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    • 제63권5호
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    • pp.652-659
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    • 2014
  • This paper deals with characteristic analysis of double sided permanent magnet linear generator using analytical method. We derived magnetic field solutions produced by permanent magnet and armature reaction based on the 2D polar coordinate and magnetic vector potential. based on the derived magnetic field solutions, Induced voltage is obtained when arbitrary sinusoidal input condition. In addition, electrical parameters such as back-EMF constant, resistance, and inductance are obtained. Finally, generating performance characteristic at the rated load and various load is examined by using equivalent circuit.

프라이자흐 모델이 결합된 유한요소법을 이용한 슬롯수, 권선법에 따른 동기형 릴럭턴스전동기의 특성해석 (Characteristic Analysis of Synchronous Reluctance Motor Related to Slot Numbers and winding using Coupled Preisach Model & FEM)

  • 변찬근;장영진;이미정;이중호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 하계학술대회 논문집 B
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    • pp.1012-1014
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    • 2003
  • This paper deals with the characteristic Analysis of synchronous reluctance motors (SynRMs) using coupled Preisach modeling & FEM. The focus of this paper is the characteristic Analysis relative to Inductances and losses on the basis of stator slot number, winding in SynRMs. The coupled Finite Elements Analysis (FEA) & Preisach model has been used to evaluate the nonlinear solution. Comparisons arc given with characteristics of normal distributed winding SynRM and those according to stator slot number, winding in concentrated winding SynRM, respectively.

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Design of Current-Type Readout Integrated Circuit for 160 × 120 Pixel Array Applications

  • Jung, Eun-Sik;Bae, Young-Seok;Sung, Man-Young
    • Journal of Electrical Engineering and Technology
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    • 제7권2호
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    • pp.221-224
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    • 2012
  • We propose a Readout Integrated Circuit (ROIC), which applies a fixed current bias sensing method to the input stage in order to simplify the circuit structure and the infrared sensor characteristic control. For the sample-and-hold stage to display and control a signal detected by the infrared sensor using a two-dimensional (2D) focal plane array, a differential delta sampling (DDS) circuit is proposed, which effectively removes the FPN. In addition, the output characteristic is improved to have wider bandwidth and higher gain by applying a two-stage variable gain amplifier (VGA). The output characteristic of the proposed device was 23.91 mV/$^{\circ}C$, and the linearity error rate was less than 0.22%. After checking the performance of the ROIC using HSPICE simulation, the chip was manufactured and measured using the SMIC 0.35 um standard CMOS process to confirm that the simulation results from the actual design are in good agreement with the measurement results.

ZVS를 이용한 자제식 고주파 인버어터의 특성해석 (Characteristic analysis of sol f-tuning controlled high frequency inverter using ZVS)

  • 배기훈;심광열;김동희;노채균
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1993년도 하계학술대회 논문집 B
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    • pp.701-703
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    • 1993
  • This paper describes characteristic analysis of high frequency inverter using zero voltage switching(ZVS) which is one of the methods to reduce switching loss. This study is generally described by introducing normalized control variables. Moreover, many characteristics of analysis results offer importanat data for circuit design. In addition, the result of its characteristic analysis is compared with that from PSpice's simulation.

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슬롯 수에 따른 100MW급 권선형 동기발전기 발전특성 및 운전특성 비교 (Operation and Generation Characteristic of 100MW-Class Wound Rotor Synchronous Generator According to Number of Slots)

  • 김창우;박요한;최장영
    • 전기학회논문지
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    • 제68권4호
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    • pp.523-531
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    • 2019
  • This paper deals with a wound-field synchronous machines(WFSM), with an electromagnet on its salient rotor, as an alternative to a permanent magnet in the rotor. We then examine the power performance characteristics, loss characteristics, V-curves and large short-circuit ratios for a large-scale synchronous generator, considering the leading and lagging operations, based on the finite-element method. We predict the performance of a 100MVA-class generator based on the operating range for a constant short-circuit ratio. At the last, We compared with the electromagnetic characteristics of three model according to number of slots.