• 전기학회논문지P
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• 제57권3호
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• pp.279-284
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• 2008

We have developed two absolute evaluation technology of inductor using current transformer (CT) comparator. One is the method that the reactance of inductor is obtained by analysing the equivalent circuit of CT with inductor connected to series at secondary terminal of CT. The other is the method that the reactance of inductor is obtained by comparing phase displacement of current flowing on inductor by using CT comparator. These technologies have the advantage to apply up to rated current and voltage of inductor. The method was applied to inductors under test in the range of $100 {\mu}H{\sim}1\;H$. The inductance of the inductor under test obtained in this study are consistent with those measured by LCR meter using the same inductor within an expanded uncertainty (k = 2) in the overall range of inductance.

• 전기학회논문지P
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• 제57권3호
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• pp.285-290
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• 2008

We have developed the absolute evaluation technique of capacitor and inductor by measuring the phase displacement as a function of resistance of employed resistors in voltage transformer(VT) comparator. The methods were applied to the capacitor with the range of 100 nF - $5{\mu}F$ and the inductor with the range of $100{\mu}H{\sim}1\;H$. The capacitance values of capacitor obtained using our method are consistent within the expanded uncertainty those obtained using capacitor bridge. The inductance values of inductor obtained using our method are also consistent within the expanded uncertainty those obtained using LCR meter.

• Journal of Magnetics
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• 제13권4호
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• pp.177-181
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• 2008

A very simple a.c. magnetic susceptometer for use in a helium closed cycle cryostat is reported in this paper. This simple setup has only a single bobbin-less copper coil, instead of the primary coil and two secondary coils typically used in mutual-inductance types. The single bobbin-less copper coil is directly mounted on the cryostat cold head. A sample is attached on the inside wall of the copper coil using a thermal contact material and its a.c. magnetic susceptibility is obtained from the measurement of the self-inductance of the sample coil using an LCR meter or an impedance analyzer. Experimental details are described and illustrative measurements on magnetic and superconducting materials as a function of temperature are included. The performances and limitations of this simple a.c. magnetic suceptometer are also discussed.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2006년도 춘계학술대회
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• pp.131-134
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• 2006

ITO/ polytetrafluorethylene (PTFE)/ Tris(8-hydroxyquinolinato Aluminum ($Alq_3$)/ Al 구조에서 정공 주입층 PTFE 의 두께 변화에 따른 유전특성은 HP 4284A precision LCR Meter 를 이용하여 주파수에 따른 임피던스와 위상각, 유전손실, 그리고 캐패시턴스를 측정하였다. 측정 결과 PTFE 의 두께가 증가할수록 임피던스 값은 증가하고, 위상각은 저주파수 영역에서는 두께가 증가할수록 감소하다가 고주파수 영역에서는 거의 같아지는 것을 확인하였다. 또한, 유전손실($tan{\delta}$)도 저주파수 영역에서는 정공 주입층이 증가할수록 감소하다가 고주파수 영역에서는 거의 같아졌고, 캐패시턴스는 PTFE 의 두께가 증가함에 따라 작아지고 주파수가 높아질수록 감소함을 확인하였다.

• 한국전기전자재료학회논문지
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• 제17권6호
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• pp.668-672
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• 2004

Upon Debye's dielectric relaxation theory, we tried simple determination method of trap level in organic EL materials. From dielectric measurements in the 20 Hz - 1 MHz frequency range and in the 150 K - 320K temperature range, the depth of traps in Alq$_3$ filled with remaining electrons was determinated. Comparing to other determination techniques like TSL, or TL, the apparatus all we need is just simple LCR meter, thermometer and cooling method(liquid nitrogen). The mean activation energy is about 0.20 eV. It is in good agreement with previous determinations by other techniques like TSL. This results consolidate the validity of Burrow's transport mechanism model. Further intensified experiment with UV light on the dielectric absorption(Photodipolair effect) was nevertheless disturbed by the photoconductivity component.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 하계학술대회 논문집
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• pp.211-213
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• 2007

The electrical parameters are used to calculate gains in the current regulator as well as to determine the reference currents of speed controller in various control strategies of Synchronous Reluctance Motors (SynRMs). Many methods of measuring or estimating the electrical parameters of SynRM have been proposed by other authors. But almost papers only measure or estimate in the limited conditions without fully considering the effects of inverter, connecting wire and magnetic saturation. The parameter results are usually different from the real system parameters. The drive performance, therefore, can not be good if using inaccurate parameters. In this paper, several methods used to measure the electrical parameters are introduced. The first method is LCR meter. And then, a method determining inductances by measuring AC current and voltage from AC power supply is presented. A new method with high reliability is proposed to measure the electrical parameters of SynRM. The experiment results verify the effectiveness of the new proposed method.

• E2M - 전기 전자와 첨단 소재
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• 제5권1호
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• pp.28-42
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• 1992

본 논문에서는 ZnO 바리스터의 유전특성에 대해 검토하였다. 25~75[.deg.C]의 온도에서 1[kHz]~13[MHz]의 부파수 범위에서 LCR meter와 computer로 구성된 측정장치를 사용하여 정전용량-주파수, 및 손실계수-주파수의 관계를 측정하였다. 수학적 해석 방법에 의해 복소유전율의 실험결과로 부터 3-4개의 Debye 피크를 추출할 수 있었다. 각 피크를 .alpha., .betha., .gamma. 및 .delta.라 할 때 활성화에너지는 각각 0.35-0.48, 0.62-0.99, 0.48 및 0.33-0.41[eV]이었고, 각 피크 중 .gamma.는 공핍층에 형성된 도너준위, .alpha. 및 .delta.는 결정립 계면준위, .betha.피크는 도너이온에 의한 것으로 추정된다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 학술대회 및 기술세미나 논문집 디스플레이 광소자
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• pp.52-53
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• 2006

ITO/ polytetrafluorethylene (PTFE)/ Tris(8-hydroxyquinolinato Aluminum ($Alq_3$)/ Al 구조에서 정공 수송층 PTFE의 두께 변화에 따른 유전특성은 HP 4284A precision LCR Meter를 이용하여 주파수에 따른 임피던스와 위상각, 유전손실, 그리고 커패시턴스를 측정하였다. 측정 결과 PTFE의 두께가 증가할수록 임피던스 값은 증가하고, 위상각은 저주파수 영역에서는 두께가 증가할수록 감소하다가 고주파수 영역에서는 거의 같아지는 것을 확인하였다. 또한, 유전손실도 저주파수 영역에서는 정공 수송층이 증가할수록 감소하다가 고주파수 영역에서는 거의 같아졌고, 커패시턴스는 PTFE의 두께가 증가함에 따라 작아지고 주파수가 높아질수록 감소함을 확인하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.107-108
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• 2005

Au and $Au/SiO_2$ nanoparticles(NPs) were synthesized by the colloidal method. The formation of Au and $Au/SiO_2$ NPs was confirmed using high resolution transmission electron microscopy (HRTEM). Synthesized solutions were deposited on Si wafer. The electrical properties of structures were measured using a semiconductor analyzer and a LCR meter. Capacitance versus voltage hysterisis curves showed the charge storage effect by Au and $Au/SiO_2$ NPs.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1524-1526
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• 2005

This paper describes the measurement and analysis of the basic line constants in PLC(Power Line Communication) in the residential building. An apartment is considered as one of the conventional residences to get the line constants in this paper and Agilent 4263B LCR Meter is used to measure the detailed values each area and the specific results and the averaged analysis data are shown in the tables. The measured results no different from the calculated values with using conventional formula due to the line arrangement neglected factors, complex permittivity, and etc. Also, this paper describes many kinds of lines and wiring figures of domestic construction. Finally, it is utilized with the analyzed line characteristics in frequency domain as a planning reference of PLC.