• Title/Summary/Keyword: LC Resonant

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New Energy Recovery Concept for AC PDP Sustaining Driver Using Current Injection Method (CIM)

  • Lee, Jun-Young;Kim, Jin-Sung;So, Myeong-Seop;Cho, Bo-Hyung
    • Journal of Power Electronics
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    • v.2 no.3
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    • pp.189-198
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    • 2002
  • New concept of energy recovery for plasma display panel (PDP) Is proposed. Different from conventional LC resonant sustaining drivers, the current built up before inverting the polarity of the panel electrodes is utilized to change the panel Polarity together with energy Previously charged in Panel capacitance. This operation Provides zero -voltage-switching of switches and reduction of EMI by rejecting the surge current when the sustain switches are turned on. The build-up current helps to reduce transition time of panel polarity and may produce more stable light waveforms. This method shows a desirable characteristic that the circuit loss is similar to that of series resonant type energy recovery circuit which is very effective method.

A Study on the Development of an Electronic Ballast for 70W Ceramic Discharge Metal Halide Lamps (70W 세라믹 방전관 메탈할라이드 램프용 전자식 안정기 개발에 관한 연구)

  • 김일권;길경석;이성근;김진모
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2002.05a
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    • pp.301-304
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    • 2002
  • This paper describes a design and fabrication of an electronic ballast for 70[W]ceramic discharge metal halide lamps. The proposed ballast is composed of a rectifier, an active PFC, a half-bridge inverter, a LC resonant circuit and a controller. The design also includes a specially designed time circuit which provides reignition of the lamp. Running frequency of the ballast is set at 45[KHz]to avoid acoustic-resonance and flicker. from the test results, input power factor and efficiency of the ballast were estimated 91[%] and 97.7[%], respectively.

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A Study On High Power Factor Sine Pulse Type Power Supply For Atmospheric Pressure Plasma Cleaning System with 3-Phase PFC Boost Converter (3상 PFC 부스트 컨버터를 채용한 상압플라즈마 세정기용 고역률 정형파 펄스 출력형 전원장치에 관한 연구)

  • Han, Hee-Min;Kim, Min-Young;Seo, Kwang-Duk;Kim, Joohn-Sheok
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.1
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    • pp.72-81
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    • 2009
  • This paper presents quasi-resonant type high power factor ac power supply for atmospheric pressure plasma cleaning system adopting three phase PFC boost converter and it's control method. The presented ac power supply consists of single phase H-bridge inverter, step-up transformer for generating high voltage and three phase PFC boost converter for high power factor on source utility. Unlikely to the traditional LC resonant converter, the propose one has an inductor inside only. A single resonant takes place through the inside inductor and the capacitor from the plasma load modeled into two series capacitor and one resistance. The quasi-resonant can be achieved by cutting the switching signal when the load current decrease to zero. To obtain power control ability, the propose converter controlled by two control schemes. One is the changing output pulse period scheme in the manner of PFM(Pulse Frequency Modulation) control. On the other, to provide more higher power to load, the DC rail voltage is directly controlled by the 3-phase PFC boost converter. The significant merits of the proposed converter are the uniform power providing capability for high quality plasma generation and low reactive power in AC and DC side. The proposed work is verified through digital simulation and experimental implementation.

LCL Resonant Compensation of Movable ICPT Systems with a Multi-load

  • Hua, Jie;Wang, Hui-Zhen;Zhao, Yao;Zou, Ai-Long
    • Journal of Power Electronics
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    • v.15 no.6
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    • pp.1654-1663
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    • 2015
  • Compared to LC resonance, LCL resonance has distinct advantages such as a large resonant capability, low voltage and current stresses of the power device, constant voltage or current output characteristics, and fault-tolerance capability. Thus, LCL resonant compensation is employed for a movable Inductive Contactless Power Transfer (ICPT) system with a multi-load in this paper, which achieves constant current output characteristics. Peculiarly, the primary side adopts a much larger compensation inductor than the primary leakage inductor to lower the reactive power, reduce the input current ripple, generate a large current in the primary side, and realize soft-switching. Furthermore, this paper proposes an approximate resonant point for large inductor-ratio LCL resonant compensation through fundamental wave analysis. In addition, the PWM control strategy is used for this system to achieve constant current output characteristics. Finally, an experimental platform is built, whose secondary E-Type coils can ride and move on a primary rail. Simulations and experiments are conducted to verify the effectiveness and accuracy of both the theory and the design method.

The PWM Controlled Cycloconverter with a Resonant Circuit for a Induction Heating (LC공진회로를 이용한 유도가열용 PWM 제어형 사이클로콘버터)

  • Kim, Young-Seok;Kim, Hyun-Jung
    • Proceedings of the KIEE Conference
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    • 1991.11a
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    • pp.214-218
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    • 1991
  • This paper presents a PWM controlled cycloconverter with a DC resonant circuit for Induction heating. This cycloconverter converts commercial frequency power to high frequency power directly. So conversion efficiency improved. Controlling a input reactive power regardless of load power, it has sinusoidal input current waveforms as well as a input. displacement factor at 1.

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A Study on the PWM Controlled Cycloconverter with a Resonant Circuit for Induction Heating (공진회로를 이용한 유도가열용 PWM 제어형 사이크로콘버터에 관한 연구)

  • Kim, Young-Seok;Kim, Jin-Soo
    • Proceedings of the KIEE Conference
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    • 1990.11a
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    • pp.283-286
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    • 1990
  • This paper presents a PWM controlled cycloconverter with a LC resonant circuit for induction heating. This cycloconverter converts commercial frequency power to high frequency power directly. So conversion efficiency improved. Controlling a input reactive power regardless of load power, it has sinusoidal input current waveforms as well as a input displacement factor at 1.

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Single-phase Resonant Inverter using SiC Power Modules for a Compact High-Voltage Capacitive Coupled Plasma Power Supply

  • Tu, Vo Nguyen Qui;Choi, Hyunchul;Kim, Youngwoo;Lee, Changhee;Yoo, Hyoyol
    • Proceedings of the KIPE Conference
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    • 2014.11a
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    • pp.85-86
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    • 2014
  • The paper presents a power supply of atmospheric-pressure plasma reactor based on SiC (Silicon Carbide) MOSFET resonant inverter. Thanks to the capacitive characteristic of capacitive coupling plasma reactor type, the LC series resonant inverter had been applied to take advantages of this topology with the implementation of SiC MOSFET power modules as switching power devices. Designation of gate driver for SiC MOSFET had been introduced by this paper. The 5kVp, 5kW power supply had also been verified by experimental results.

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Deadbeat control of Hybrid Active Power filter using Distrubance-observer (외란관측기를 사용한 복합형능동전력필터의 Deadbeat 제어에 관한 연구)

  • 조광승
    • Proceedings of the KIPE Conference
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    • 2000.07a
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    • pp.123-126
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    • 2000
  • When LC filter is connected parallel to the Active Power Filter a problem of the resonance between the Active Power Filter(AF) and LC filte often arises. in this paper Deadbeat control of Hybrid Active Power Filter using Disturbance-observer is introduced to solve this problem. By the estimation of the harmonics disturbance using proposed disturbance observer the compensation characteristics of the AF is improved and the resonant current is suppressed. The validity of proposed disturbance observer is verified from simulation results using PSIM

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A Telemetry Silicon Pressure Sensor of LC Resonance Type (LC공진을 이용한 원격측정용 압력센서의 제작 및 실험)

  • Kim, Hak-Jin;Kim, Soon-Young;Yang, Sang-Sik
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1872-1874
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    • 2001
  • This paper presents an implantable telemetry LC resonance-type pressure sensor to measure the cerebral ventricle pressure. The sensor consists of an inductor and a capacitor. The LC resonant circuit consists of the sensor and an external antenna coil that are coupled magnetically. The resonance frequency of the circuit decreases as the applied pressure increases the capacitance of the sensor. The sensor is designed in consideration of the biocompatibility and long lifetime for continuous monitoring of the ventricle pressure. The sensor is simple to fabricate and small in comparison with others reported previously. The inductor is fabricated by electroplating and the variable capacitor is constructed with a flexible p+ diaphragm. Also, the deflection of the diaphragm, the variation of the capacitance and the resonance frequency are analyzed and calculated.

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Design of the High Efficiency Bidirectional Converter for DC Distributed Power System (직류 배전 시스템을 위한 고효율 양방향 컨버터의 설계)

  • Tran, Duc-Hung;Choi, Woojin
    • Proceedings of the KIPE Conference
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    • 2016.11a
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    • pp.5-6
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    • 2016
  • This paper introduces a high efficiency bidirectional resonant converter using an additional LC auxiliary circuit for dcdistribution applications. The LC auxiliary circuit operates as a variable inductor and the additional LC circuit helps to increase the effective magnetizing inductance, thereby reducing the turn-off and primary circulating current. A 5 kW bidirectional converter for dc-distribution system is implemented to verify the validity of the proposed method. The experimental results show the high efficiency characteristics of the proposed converter over the wide range of load in both direction of power flow. The maximum efficiency of the proposed system was 98.1 % at 3 kW.

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