• 제목/요약/키워드: High frequency inverter

검색결과 810건 처리시간 0.027초

PWM 인버터-유도전동기 구동시스템의 전도노이즈 예측에 관한 연구 (A Study on Prediction of Conducted EMI In PWM inverter fed Induction Motor Drive System)

  • 이진환;안정준;원충연;김영석;최세완
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1999년도 전력전자학술대회 논문집
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    • pp.367-372
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    • 1999
  • In this paper, an inverter fed induction motor drive system is analyed in order to predict the conducted interference. High frequency model for inverter, motor and system parasitic components are proposed. High frequency component allows time and frequency domain analysis to be performed with standard PSpice tool. The overall high frequency component and model are verified by comparing simulation and experimental result.

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근거리 무선전력 전송용 2MHz 공진형 class Φ2 인버터 (The Resonant class Φ2 Inverter for short range magnetic resonant wireless power transfer system)

  • 양해열;김창선
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2012년도 전력전자학술대회 논문집
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    • pp.447-448
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    • 2012
  • With wireless power transfer the of ECR device the designed with a high-frequency and high frequency AC power to the device that may enter the high-frequency switching inverter to be possible. In this paper, is designed to 2MHz switching frequency by using ECR device capable of 2MHz Class ${\Phi}_2$ inverter was designed as a wireless power transmission.

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3kW 멀티스트링 태양광 인버터 설계 및 시뮬레이션 (3kW multi-string photovoltaic inverter design and simulation)

  • 이종인;유병규;유권종;김흥근
    • 한국태양에너지학회:학술대회논문집
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    • 한국태양에너지학회 2009년도 추계학술발표대회 논문집
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    • pp.371-376
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    • 2009
  • The Power Conditioning System is Power Transfer System which make array DC current to the Grid sinusoidal current. These are Low Frequency Transformer Inverter Type, High Frequency Transformer Inverter Type and Transformer-less Type. Low Frequency Transformer Type has a Excellent Isolation property, but doesn't have competitiveness in Size and Cost. Also High Frequency Transformer Type has a good Isolation property but there are many steps in Power transfer Switching. Nowadays, Transformer-less Type inverter change a transformer to DC/DC Converter which is small and cost effective. In this paper shown the DC/DC Converter Transformer-less Type multi-string inverter design and simulation. The Control Algorithm will be introduced and Simulation was accomplished.

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광역 주파수 전류원형 인버터 (Wide Frequency Current Source Inverter)

  • 전성즙;조규형
    • 대한전기학회논문지
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    • 제43권6호
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    • pp.927-935
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    • 1994
  • Detailed analysis of the commutation circuit of the proposed wide-frequency current source inverter is given. In this inverter a spike-limit circuit and a precommutation circuit are used. The spike-limit circuit is intended to limit spike voltage which is arising during commutation time in a current source inverter, and the precommutation circuit to reuse the energy which flows from main inverter to spike-limit circuit during commutation time to aid commutation. Thus voltage stress of main thyristor is minimized. Since this inverter can be made up of thyristors for phase control, it has some advantage in high voltage and high power application.

5[kW]급 풀-브릿지 고주파 공진형 인버터를 이용한 고효율 유도가열 히터 개발 (Development a High-Efficiency Induction Heating Heater using a 5[kW] Class Full-Bridge High Frequency Resonant Inverter)

  • 권혁민;신대철
    • 전력전자학회논문지
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    • 제10권5호
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    • pp.481-487
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    • 2005
  • 제안한 유도가열 시스템은 증류탑 장치에 사용되는 특수충진체에 의한 열교환기술과 IH(Induction-Heating)전자유도가열용의 특수한 고주파 전력회로 기술을 응용한 차세대 가열방식이다. 특히 일체의 연소과정이 없다는 점에서 작업환경의 개선이 가능하며 본 기술은 IGBT대응의 고주파 인버터를 사용하여 상용교류로부터 수[kHz]의 고주파 교류를 발생시킬 수 있다. 본 논문에서는 절연체 용기 내에 특수 스텐레스 발열체부하를 수납하여 용기 외부의 고주파 공진형 인버터 접속의 워킹코일로부터 비접촉 상태로 전자유도 와전류를 구조체에 흘림으로서 발열하게 되는 새로운 유체가열방식을 제안한다. 그리고 5[kW]급 풀-브릿지 공진형 인버터 시스템과 공진부하의 동작해석, 특성분석 및 본 시스템을 이용한 고효율 스팀 발생장치의 개발과 시스템의 응용에 대해 논하였다.

고주파 공진형 인버터식 X선 발생장치의 설계 (Design of High Frequency Resonant Inverter Type X-Ray Generator)

  • 이성길;박수강;백형래;정수복
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제51권1호
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    • pp.34-39
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    • 2002
  • Most X-ray generator had been used do rectifier type transformer high tension generator which is supplied in a clinical diagnosis. But it is difficult to miniaturize and become light weight. Also, because the ripple rate of tube voltage is high, X-ray generating efficiency is very low. Therefore, it is supplied gradually from abroad being developed high tension generator for inverter type X-ray generator which use semi-conductor switching element for electric power that have high speed switching ability to solved these problem. But, semi-conductor element of big capacity are used by X-ray tube's big consumption power and diffusion is difficult in the small size hospital because production cost is ascending by doing digital control through DSP and product price becomes expensive. Therefore, in this paper, design and manufactured CR type voltage divider for feedback control of tube voltage of high frequency resonance type inverter and high tension transformer for high frequency to apply economical diffusion type X-ray generator which have wide output voltage and load extent. It is Proved do X-ray generator and stability of X-ray tube's output characteristics through an experiment.

전류형 GTO Inverter와 그 기본특성 (New Current-fed GTO Inverter and Its Basic Characteristics)

  • 임달호;;이종하
    • 대한전기학회논문지
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    • 제36권1호
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    • pp.3-8
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    • 1987
  • The conventional autosequentially commutated current-fed inverter (ASCI) is widely employed with the induction motor drives for speed control. Howener, this inverter has a limit of high power and high frequency indution motor drives. One of the limitations is to be found in the commutation capacitors in the main circuit of this inverter. A new current-fed gate turn-off thyristor (GTO) inverter is developed. This inverter is composed of the main GTO bridge configuration and the improved energy rebound circuit (ERC)without the commutation capacitor. This inverter works stable at high frequency from light load to heavy one. The improved ERC is used not only to rebound the load reactive power to the dc link, but also to return the power in the load to the ac source. The new GTO inverter circuit and the characteristics of the inverter induction motor drives are explained and analyzed.

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공진형 고주파 인버터에서의 공진주파수 추적을 위한 PLL 기법 (PLL Technique for Resonant Frequency Trancking in High Frequency Resonant Inverters)

  • 김학성
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2000년도 전력전자학술대회 논문집
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    • pp.368-371
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    • 2000
  • The PLL(Phase-Locked Loop) techniques re employed to make the switching frequency of a resonant inverter follow the resonant frequency which may vary due to the load variations during operation. The conventional design guide of PLL is not suitable in these case since the inverter characteristics are not considered. In this paper the phase characteristics of a resonant inverter is analysed and added to the closed loop. And the design of PLL with digital phase detector is illustrated for the output frequency to track the resonant frequency of the inverter.

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Zero Voltage Switching Boost H-Bridge AC Power Converter for Induction Heating Cooker

  • Kwon, Soon-Kurl;Saha, Bishwajit
    • 조명전기설비학회논문지
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    • 제21권4호
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    • pp.19-27
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    • 2007
  • This paper presents a novel soft-switching PWM utility frequency AC to high frequency AC power conversion circuit incorporating boost H-bridge inverter topology, which is more suitable and acceptable for cost effective consumer induction heating applications. The operating principle and the operation modes are presented using the switch mode equivalent circuits and the operating voltage and current waveforms. The performances of this high-frequency inverter using the latest IGBTs are illustrated, which includes high frequency power regulation and actual efficiency characteristics based on zero voltage soft-switching(ZVS) operation ranges, and the power dissipation as compared with those of the conventional type high frequency inverter. In addition, a dual mode control scheme of this high frequency inverter based on asymmetrical pulse width modulation(PWM) and pulse density modulation(PDM) control scheme is discussed in this paper in order to extend the soft switching operation ranges and to improve the power conversion efficiency at the low power settings. The power converter practical effectiveness is substantially proved based on experimental results from practical design example.

PLL을 이용한 공진부하 MOSFET 인버어터의 주파수 추종제어계 (Frequency Follow-up Control System of Resonant Load MOSFET Inverter using PLL)

  • Kim, Joon-Hong;Joong-Hwan kim
    • 대한전기학회논문지
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    • 제35권7호
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    • pp.272-277
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    • 1986
  • The system that follows to the resonance frequency of high frequency MOSFET inverter and varies according to the changes of load characteristics is proposed. Also we suggested a method how to select the resonant load type between series and parallel circuit for a given inverter type. It leads to the conclusion that in the case of high impedance loads, parallel resonant circuits are preferable, on the other hand, for low impedance loads, series resonant circuits are more preferable. For frequency tracking, a PLL circuit is used as main control element to detect the phase difference of current and voltage of load. The realized apparatus composed of control circuit and voltage type full-bridged MOSFET elements as main parts of inverter. A stable frequency follow-up characteristics are obtained for 1.2MHz, 1.5KW high frequency output and power is always supplied to the load with unity power factor.

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