• 제목/요약/키워드: Pulse Transformer

검색결과 259건 처리시간 0.029초

고 에너지 밀도 펄스 변압기 설계 (Design of A High Energy Density Pulse Transformer)

  • 남상훈;박성수;하기만
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 E
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    • pp.2186-2188
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    • 1999
  • A high frequency and energy density pulse transformer is a critical component of a high voltage power supply in a traveling wave tube (TWT) amplifier system. In this paper, processes of design, manufacturing, and test of the transformer are discussed. Primary voltage of the transformer is 240 V. The transformer secondary have two outputs which are 4100 V (Helix) and 2050 V (Collector). Total output power is 860 W. Normal operating frequency of the transformer is 10 kHz. In high energy density pulse transformers, temperature rise is a main problem during its operation. From our study, it was found that resonant current due to leakage inductance and stray capacitance was the main cause of temperature rise. This happens because of the inherently high turn-ratio in high voltage transformers. Solutions to reduce stray components are presented.

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고압 펄스 성형라인 충전을 위한 공심형 고압 펄스트랜스의 제작과 동작 특성 (Fabrication and Operation Testing of an Air-cored Pulse Transformer for Charging a High Voltage Pulse Forming Line)

  • 진윤식;김영배;김종수;류홍제;조주현;임근희;임수원
    • 전기학회논문지
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    • 제59권5호
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    • pp.939-944
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    • 2010
  • A high voltage air-cored helical strip/wire type pulse transformer has been fabricated for charging of a high voltage pulse forming line. As a primary coil, copper strip of 25mm width was wound helically around a MC nylon cylinder. For a secondary coil, copper enameled wire of 1mm diameter was wound around conical cylinder in order to provide insulation between two windings. The coupling coefficient of 0.53 was obtained when two coils were combined coaxially in the insulation oil filled chamber. Voltage gain and energy transfer efficiency were investigated by varying the parameters of primary and secondary circuit. Test results shows that the voltage gain increases up to 17 with increasing the primary capacitance up to 200nF. And highest energy transfer efficiency of 44% was obtained when the dual resonant operation condition was nearly satisfied. The pulse transformer developed in this study can be used for charging the middle conductor of a Blumlein pulse forming line.

EMP 방호성능 시험용 통합형 E1 펄스 발생장치 분석 및 성능 개선 (Analysis and Performance Improvement of Integrated E1 Pulse Generator for EMP Protection Performance Test)

  • 김영진;강호재;정영경;윤동기;박용배
    • 한국전자파학회논문지
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    • 제29권6호
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    • pp.415-423
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    • 2018
  • 본 논문에서는 HEMP(High-altitude Electromagnetic Pulse)와 같은 외부전자파 환경에 노출된 EMP 방호시설에 연결된 전송선로에 유기된 HEMP 위협에 대한 전도성 방호 성능 평가를 위한 E1 펄스에 대해 연구한다. 기존 E1 펄스 발생장치는 Marx Generator 고전압 승압 방식을 사용하지만, 본 연구에서는 광대역 출력전압(30~350 kV) 가변이 용이한 Tesla Transformer 방식을 사용한다. E1 펄스 발생장치의 구성 요소인 제어기, 전원장치, 고전압 승압장치, 펄스성형장치도 각각 분석한다. Tesla Transformer를 이용한 E1 펄스는 시뮬레이션을 통해 성능을 예측하고, 실제 개발된 장비를 이용하여 결과를 검증한다.

산업용 선형가속기 시스템 적용을 위한 30-MW 클라이스트론용 고 평균전력 펄스 트랜스포머의 설계 (Design of High Average Power Pulse Transformer for 30-MW Klystron of L-Band Linac Application)

  • 장성덕;손윤규;권세진;오종석;;;문성익;김상호;조무현;남궁원
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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    • pp.1550-1551
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    • 2006
  • An L-band linear accelerator system for e-beam sterilization is under design for bio-technology application. The klystron-modulator system as RF microwave source has an important role as major components to offer the system reliability for long time steady state operation. A PFN line type pulse generator with a peak power of 71.5-MW, $7{\mu}s$, 285 pps is required to drive a high-power klystron. The high power pulse transformer has a function of transferring pulse energy from a pulsed power source to a high power load. The pulse transformer producing a pulse with a peak voltage of 275 kV is required to produce 30-MW peak and 60 kW average RF output power at the frequency of 1.3-GHz. We have designed the high power pulse transformer with 1:13 step-up ratio. The peak and average power capability is 71.5-MW (275 kV, 260 A at load side with $7{\mu}s$ pulse width) and 130 kW, respectively. In this paper, we present a system overview and initial design results of the high power pulse transformer.

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L-band 30-MW 클라이스트론용 고출력 펄스트랜스포머의 파라미터 평가 (Parameter Evaluation of High-Power Pulse Transformer for L-Band 30-MW Klystron)

  • 장성덕;손윤규;권세진;오종석;김상훈;양해룡;문성익;권봉환;조무현;남궁원
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 제38회 하계학술대회
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    • pp.1079-1081
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    • 2007
  • An L-band Linear Accelerator System for E-beam sterilization is under construction for bio-technology application. The klystron-modulator system as an RF microwave source has an important role as major components to offer the system reliability for long time steady-state operations. A PFN line type pulse generator with a peak power of 71.5-MW, $7\;{\mu}s$, 285 pps is required to drive a high-power klystron. The high power pulse transformer has a function of transferring pulse energy from a pulsed power source to a high power load. The pulse transformer producing a pulse with a peak voltage of 275 kV is required to produce 30-MW peak and 60 kW average RF output power at the frequency of 1.3-GHz. We have designed the high power pulse transformer with 1:13 step-up ratio. The peak and average power capability is 71.5-MW (275 kV, 260 A at load side with $7\;{\mu}s$ pulse width) and 130 kW, respectively. In this paper, we present measurements and its analysis on the design parameters, and an initial test result as well as a design concept on the high-power pulse transformer.

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12 펄스 인버터에서 결합변압기를 이용한 고조파 제거기법 (Harmonic Elimination Method of Using Coupling Transformer in Twelve Pulse Inverter)

  • 정창용;이영운;최규형;오태규
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1996년도 하계학술대회 논문집 A
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    • pp.613-615
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    • 1996
  • Harmonic elimination method of using coupling transformer in twelve pulse inverter is presented for high power application. This method is using coupling transformer and PWM(pulse width modulation) switching and voltage source inverter. The object of proposed harmonic elimination method is obtained inverter output of low THD(Total Harmonic Distortion). The simulation results confirm the proposed harmonic elimination method.

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펄스 변압기를 이용한 비접지 MOSFET의 게이트 구동 회로 설계 (Design of the gate drive circuit for floating MOSFET using the pulse transformer)

  • 박종연;이봉진
    • 산업기술연구
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    • 제27권B호
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    • pp.15-20
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    • 2007
  • This paper presents the new design method for the gate driver circuit of the floating MOSFET by using the pulse transformer. Each parameters of the proposed circuit are delivered by the numerical calculation method. By considering inner characteristics of MOSFET, the gate driver makes to increase the efficiency of the power conversion and decrease operating heat. Computer simulations and to experimental results for a Buck Converter are presented in order to validate the proposed method.

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Investigation of Rise Time and Overshoot in Pulse Transformers with Different Topologies for Electromagnetic Trigger of SCRs

  • Lv, Gang;Zeng, Dihui;Zhou, Tong
    • Journal of Power Electronics
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    • 제18권3호
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    • pp.902-909
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    • 2018
  • This study investigates the influences of different core parameters on the dynamic performances, such as rise time and overshoot, in pulse transformers for the triggering circuit of SCRs. First, a simplified transformer equivalent circuit, which emerges from a standard transformer equivalent circuit, is developed to analyze the step response. Second, the relations between the dynamic performances and the parasitic parameters are calculated by the simplified equivalent circuit. Third, the variations of rise time and overshoot, which are vital to the stability of triggering SCRs, with different core parameters, such as mechanic dimensions and topologies, are comprehensively investigated by analyzing the parasitic parameters. Finally, prototype transformers are fabricated to experimentally validate the analysis. The presented method can practically instruct the design of a pulse transformer for triggering SCRs.

누설변압기 1차측의 스위칭 제어에 의한 펄스형 $CO_2$레이저에 관한 연구 (A Study on the Pulsed $CO_2$ Laser by the Switching Control of Leakage Transformer Primary)

  • 정현주;이동훈;김희제
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제49권9호
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    • pp.541-545
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    • 2000
  • We propose a pulsed $CO_2$laser below 30W by the AC(60Hz) switching control of leakage transformer primary which has some advantages of cost and size compared to a typical pulsed power supply. Pulse repetition rate is adjusted from 5 Hz to 60 to Hz control laser output. In this laser a low voltage open loop control for high voltage pulse discharge circuit is employed to aviod the Hv sampling or switching and high voltage leakage transformer is used to convert low voltage pulse rectified from AC to high voltage one. A ZCS(Zero Crossing Switch) circuit and a PIC(programble one-chip microprocessor are used to control gate signal of SCR precisely. The pulse repetition rate is limited by 60Hz due to the frequency of AC line and a high leadkage inductance. The maximum laser output was about 23 W at pulse repetition rate of 60Hz total gas mixture of $CO_2$ : $N_2$ : He=1: 9: 15 and total pressure of 18 Torr

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IGBT 직렬구동에 의한 60KV 펄스 전원장치 개발 (Development of 60KV Pulsed Power Supply using IGBT Stacks)

  • Ryoo, Hong-Je;Kim, Jong-Soo;Rim, Geun-Hie;Goussev, G.I.;Sytykh, D.
    • 전기학회논문지
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    • 제56권1호
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    • pp.88-99
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    • 2007
  • In this paper, a novel new pulse power generator based on IGBT stacks is proposed for pulse power application. Because it can generate up to 60kV pulse output voltage without any step- up transformer or pulse forming network, it has advantages of fast rising time, easiness of pulse width variation and rectangular pulse shape. Proposed scheme consists of series connected 9 power stages to generate maximum 60kV output pulse and one series resonant power inverter to charge DC capacitor voltage. Each power stages are configured as 8 series connected power cells and each power cell generates up to 850VDC pulse. Finally pulse output voltage is applied using total 72 series connected IGBTs. To reduce component for gate power supply, a simple and robust gate drive circuit is proposed. For gating signal synchronization, full bridge invertor and pulse transformer generates on-off signals of IGBT gating with gate power simultaneously and it has very good characteristics of short circuit protection.