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盧采均 嶺南大學校 工業技術硏究所 1975 연구보고 Vol.3 No.1
A new set of topological formulas is presented, which is valid for networks which may contain all the four types of dependent generators. The application of the formulas requires the listing of tree pairs and evalution of their signs. In contrast with some prior work, The graphs of ideal components, such as ideal transformers and operational amplifiers, are obtained without complicated derivations. Futhermore, in the presence of these components, no special rules are required, nor are redundant terms generated during the analysis.
盧采均 嶺南大學校 工業技術硏究所 1981 연구보고 Vol.9 No.1
This paper presents a calculation method for voltage oscillations in transformer windings during impulse test is presented. This method takes into account the electrostatic and electromagnetic combinations of windings, and therefore, permits a precise analysis of voltage response in the windings to which an impulse voltage is applied and of the transferred voltage in other windings to which an impulse voltage is not applied directly. The necessary multi-winding equivalent network is made up by adding inductance and capacitance between winding. Different methods of solution are discussed.
盧采均 嶺南大學校 工業技術硏究所 1981 연구보고 Vol.9 No.1
A mothod to obtain linearity in the mechanical characteristics of two-phase asynchronous motors, which consist in putting negative impedances of proper value into both stator phases of motor, is described. It is shown that this way achives a high degree of linearity in the Characteristics in a large velocity range, thus making this type of motor similar, from this point of view, to D.C motors. Particular advantages concerning the dynamic working and the efficiency are also obtained. This method is particularly fit for producing high power acturators.
이상호,이봉섭,정도영,황계호,남승식,노채균 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.2
This paper describes a DC-DC converter connected two unit inverters, a half-bridge high frequency resonant inverters, at the input with parallel. It estimated characteristics such as the average power, the average output voltage etc, for the design of the device with the normalized parameter values. Also, This paper confirms a rightfulness of circuit analysis by comparing a simulation and experimental results of proposal converter. The proposed paper certified that the theoretical waveforms are equal to the experimental waveforms. In the future, it is expected that proposal converter can be applicated for the system of fixed DCvoltage source.
金光一,丁元榮,盧采均 慶一大學校 1992 論文集 Vol.8 No.1
This paper described a study on the series resonant type DC-DC converter. A complete DC-DC converter analysis of the half-bridge H·F Voltage resonant converter is presented. Continuity and discontinuity of the operation mode divided into two classes in this circuit. Output voltage, current and power obtained to the circuit analysis.
E급 스위칭 Mode DC-DC Converter에 관한 연구
남승식,김동희,노채균 嶺南大學校 工業技術硏究所 1992 연구보고 Vol.20 No.1
This paper proposes a DC-DC Converter of high frequency inverter control type of E class switching mode to reduce switching loss by constructing a resonance type DC-DC Converter. The steady state characteristics of the proposed circuit is analyzed by mormalized parameters. In addition, the characteristics of proposed DC-DC converter of E class switching mode is evaluated by describing the characteristics frequency, load, switching voltage and current. Based on the characteristic values, a method of circuit design is proposed. A constant output is controlled by PWM and PFM-TRC method using power MOSFET. By means of experiment, the proposed theory is proved and the results show that it can be used for practical purposes.
커패시터 공진전압을 이용한 하프 브릿지 고주파 인버터의 특성해석에 관한 연구
김동희,김도선,김종해,노채균 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.2
This paper presents operating characteristics of the main conversion considering half-bridge high frequency resonant inverter using capacitor Resonant voltage to the object of research. The analysis of the proposed circuit describes generally by using normalized parameter, and basic operating principle and driving characteristics have been evaluated as to switching frequency and load parameter. Several features are considered, this paper suggests some fundamental data for designing the main power conversion circuit. To prove rightfulness for characteristics analysis of proposed inverter, it is confirmed that this paper are nearly, equal to circuit analysis by comparison theoretical and experimental waveforms results of proposal inverter using Power-MOSFET of switching devices. In the future, design technique proposed in this paper can be applied to several areas such as induction heating, power supply of DC-DC converter, UPS etc.
노채균,김동희,심광열 嶺南大學校 工業技術硏究所 1994 工業技術硏究所論文集 Vol.22 No.1
This paper proposes the high frequency inverter with resonant capacitor sepration. As state parameters of the proposed inverter were nomalized, the characteristics of the steady state and transient state were described ordinarily and quantitatively. The characteristics according to partial rate of resonant condenser were presented as a useful data for a circuit design. The proposed inverter turned out realizable in practical application because of design data of circuit based on characteristic values obtained through characteristic evaluations.
單相 싸이클로콘버터에 依한 誘導電動機의 速度制御에 관한 硏究
盧采均,金圭哲,李鍾浩 嶺南大學校 工業技術硏究所 1986 연구보고 Vol.14 No.1
This paper describes a study on the induction motor speed control using single-phase to single-phase cycloconverter. The results abtained from this study are as follows. 1) Synchronize type cycloconverter could eliminate asymmetry of voltage and ripple of torque. 2) A satisfactory result was obtained at 10, 12, 15, 20 and 30Hz when flux constant was controlled. 3) A more study is expected on decrease of maximum torque when voltage constant frequency variable method.