• 제목/요약/키워드: Coupled inductor

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다층 구조를 갖는 LTCC기술에서 나선형 인덕터로 인한 혼신 해석 (Crosstalk Analysis of the Spiral Inductor in LTCC)

  • 김성남;김경철;조현민;한치전;양형국;이해영
    • 한국전자파학회:학술대회논문집
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    • 한국전자파학회 2003년도 종합학술발표회 논문집 Vol.13 No.1
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    • pp.260-264
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    • 2003
  • It is possible to design the high performance, integration and low cost radio frequency components by using LTCC(Low Temperature Cofired Ceramic) technology. But there is a critical point to design the spiral inductor because of crosstalk effects. of the crosstalk effect of the spiral inductor are investigated using full-wave analysis of the FEM(Finite Element Method) in this paper. The results show that input power of the spiral inductor are coupled from 0.1% to 10% above 3GHz. Therefore, we should consider the crosstalk effects when we design the LTCC.

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A New Three Winding Coupled Inductor-Assisted High Frequency Boost Chopper Type DC-DC Power Converter with a High Voltage Conversion Ratio

  • Ahmed Tarek;Nagai Shinichiro;Hiraki Eiji;Nakaoka Mutsuo
    • Journal of Power Electronics
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    • 제5권2호
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    • pp.99-103
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    • 2005
  • In this paper, a novel circuit topology of a three-winding coupling inductor-assisting a high-frequency PWM boost chopper type DC-DC power converter with a high boost voltage conversion ratio and low switch voltage stress is proposed for the new energy interfaced DC power conditioner in solar photovoltaic and fuel cell generation systems. The operating principle in a steady state is described by using its equivalent circuits under the practical condition of energy processing of a lossless capacitive snubber. The newly-proposed power MOSFET boost chopper type DC-DC power converter with the three-winding coupled inductor type transformer and a single lossless capacitor snubber is built and tested for an output power of 500W. Utilizing the lower voltage and internal resistance power MOSFET switch in the proposed PWM boost chopper type DC-DC power converter can reduce the conduction losses of the active power switch compared to the conventional model. Therefore, the total actual power conversion efficiency under a condition of the nominal rated output power is estimated to be 81.1 %, which is 3.7% higher than the conventional PWM boost chopper DC power conversion circuit topology.

결합 인덕터를 갖는 플라잉-커패시터 모듈러 멀티레벨 컨버터 (Flying-Capacitor Modular Multilevel Converters with Coupled Inductors)

  • 리덕중;이동춘
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2018년도 전력전자학술대회
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    • pp.288-289
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    • 2018
  • In this paper, the coupled inductor scheme instead of noncoupled inductors is suggested to reduce the dimension, weight and cost of the magnetic core. The simulation results have verified the effectiveness of the flying-capacitor MMC with coupled inductors and its control method for medium-voltage induction motor drives at low-speed operation.

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A New HID Lamp Ballast using Internal LC Resonance and Coupled Inductor Filter

  • Cho Byoung-Chol;Moon Sung-Jin;Lee In-Kyu;Cho B.H.
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
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    • pp.737-740
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    • 2001
  • This paper proposes a new ballast that is ignited by internal LC resonance of buck converter. In order to cancel the steady state current ripple, the proposed ballast utilizes the coupled inductor filter which minimizes the size and weight of the ballast. The operation mode of the proposed ballast is analyzed and the performance of the new ballast is verified by the experimental results from a HOW prototype ballast for metal halide discharge (MHD) lamp.

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A Magnetically Coupled AC/DC Boost Converter with Low Reverse Recovery and Conduction Losses

  • Kim, Ju-Young;Park, Ki-Bum;Moon, Gun-Woo;Youn, Myung-Joong
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2008년도 하계학술대회 논문집
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    • pp.391-393
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    • 2008
  • A modified boost converter with magnetic coupling is presented to reduce the reverse recovery loss while maintaining low conduction loss of the rectifiers. By utilizing a coupled inductor and a set of diodes, the current passing the boost rectifier is transferred to an auxiliary loop before turn-off, allowing low di/dt for reduced recovery loss. Moreover, the boost inductor is brought inside the bridge rectifier to reduce conduction loss by decreasing the number of conducting diodes during switch turn-off. Experimental results of a 500W prototype are provided to verify the increase in efficiency and validity of the proposed converter.

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2차측 결합 인덕터를 이용한 ZVZCS Three Level DC/DC 컨버터에 관한 연구 (A Study on the Zero-Voltage and Zero-Current-Switching Three Level DC/DC Converter using Secondary Coupled Inductor)

  • 배진용;김용;백수현;김필수;이은영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.200-204
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    • 2001
  • A ZVZCS(Zero Voltage and Zero Current Switching) Three Level DC/DC Converter is presented to secondary auxiliary circuit. The new converter presented in this paper used a phase shift control with a flying capacitor in the primary side to achieve ZVS for the outer switch. A secondary auxiliary circuit, which consists of one small capacitor two small diode and one coupled inductor is added in the secondary to provides ZVZCS conditions to primary switches, ZVS for outer switches and ZCS for inner switches. Many advantages including simple circuit topology high efficiency, and low cost make the new converter attractive for high power applications. The principle of operation, feature and design considerations are illustrated and verified through the experiment with a 1kW 50kHz IGBT based experimental circuit.

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Dead Angle Reduction of Single-Stage PFC Using Controllable Coupled Inductors

  • Tavassol, Mohammad Mehdi;Farzanehfard, Hosein;Adib, Ehsan
    • Journal of Power Electronics
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    • 제15권1호
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    • pp.78-85
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    • 2015
  • This paper presents a new structure of single-stage flyback power factor correction (PFC) converter with a controllable coupled negative magnetic feedback (NMF) winding. NMF winding is used to reduce the bulk capacitor voltage at high line voltages and light loads. However, it would cause line current distortion at zero crossing condition. In the proposed circuit, a series winding is used with NMF inductor to eliminate the NMF inductor at low line voltages. As a result, the dead angle of the input current, near zero voltage crossing, is eliminated and the power factor is increased. The presented experimental results of the proposed PFC converter confirm the integrity of the new idea and the theoretical analysis.

2차측 보조회로를 이용한 ZVZCS Three-Level 컨버터에 관한 연구 (A study on the ZVZCS(Zero-Voltage and Zero-Current-Switching) Three-Level converter using the secondary auxiliary circuit)

  • 김동원;김용;배진용;이은영;이규훈
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2009년도 춘계학술대회 논문집 에너지변화시스템부문
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    • pp.161-164
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    • 2009
  • This paper presents the ZVZCS(Zero Voltage and Zero-Current-Switching) Three-Level converter using the secondary coupled inductor and auxiliary capacitor. The converter with phase-shift control is proposed to reduce the circulating loss in primary and the voltage stress in secondary side. Using a coupled winding of the output inductor, two auxiliary capacitors are generated to reset the primary current at circulating interval.

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Coupled Inductor를 이용한 계통연계형 인버터 병렬운전 (Parallel Operation of Grid-Connected Inverters Using Coupled Inductor)

  • 신동설;이종필;이경준;유동욱;김희제
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2012년도 전력전자학술대회 논문집
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    • pp.488-489
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    • 2012
  • 본 논문은 계통연계형 인버터의 병렬 운전 시 생기는 문제점을 해결하기 위한 방안으로 커플링된 필터 인덕터를 제안한다. 이 방식은 필터 인덕터의 전류 리플의 감소효과와 함께 인터리빙 기법을 적용하여 커플링된 필터 인덕터의 출력 전류 리플 또한 감소시킨다. 인덕터 전류의 리플 감소를 통해서 인덕터의 코어손실 감소 효과는 물론이고, 필터 인덕터의 커플링을 통해서 두 개의 인덕터가 하나로 합쳐짐에 따라 그 부피 또한 감소시킬 수 있으며, 병렬 운전하는 인버터간 순환전류 또한 저감되는 효과가 있다. 10kW 시제품을 통해 제안된 방식 우수성을 검증하였다.

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A Novel Switched-Capacitor Based High Step-Up DC/DC Converter for Renewable Energy System Applications

  • Radmand, Fereshteh;Jalili, Aref
    • Journal of Power Electronics
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    • 제17권6호
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    • pp.1402-1412
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    • 2017
  • This paper presents a new high step-up dc/dc converter for renewable energy systems in which a high voltage gain is provided by using a coupled inductor. The operation of the proposed converter is based on a charging capacitor with a single power switch in its structure. A passive clamp circuit composed of capacitors and diodes is employed in the proposed converter for lowering the voltage stress on the power switch as well as increasing the voltage gain of the converter. Since the voltage stress is low in the provided topology, a switch with a small ON-state resistance can be used. As a result, the losses are decreased and the efficiency is increased. The operating principle and steady-states analyses are discussed in detail. To confirm the viability and accurate performance of the proposed high step-up dc-dc converter, several simulation and experimental results obtained through PSCAD/EMTDC software and a built prototype are provided.