• Title/Summary/Keyword: High frequency resonant inverter

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Three Phase Voltage Source Soft Switching Inverter with High Frequency Pulse Current Transformers

  • Inaba, Claudio Y.;Hiraki, Eiji;Nakaoka, Mutsuo
    • Journal of Power Electronics
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    • v.2 no.4
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    • pp.288-296
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    • 2002
  • In this paper, a high frequency transformer - assisted auxiliary active resonant commutated snubber (HFTA-ARCS) for voltage source soft switching pulse width modulated power conversion circuits is presented. A three phase voltage source type soft switching inverter incorporating HFTA-ARCS circuits in its three bridge legs can reduce current rating of auxiliary active power switches and has sensorless simplified control scheme which any specified boost current management is not required for soft switching. Its operation principle and digital control scheme are described and a practical design method of circuit parameters on this HFTA-ARCS circuit is also introduced on the basis of computer simulation. Moreover, this space voltage vector modulated soft switching inverter system with DSP-based digital control scheme Is discussed and its effectiveness is proved on the basis of performance evaluations. The operating performances of this inverter system are also compared with those of conventional three-phase hard switching inverter under practical conditions of specified parameters.

Series Resonant Full Bridge Inverter for Battery-fed Microwave Oven (배터리 구동 전자레인지를 위한 직렬 공진형 풀브릿지 인버터)

  • 鄭 龍 采;韓 盛 軫
    • The Transactions of the Korean Institute of Power Electronics
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    • v.7 no.2
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    • pp.165-170
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    • 2002
  • In order to solve the problem of system efficiency reduced on account of two stage power conversion, we propose a series resonant full bridge Inverter circuit for battery-fed microwave oven. This circuit has both a compact size and a light weight comparing with the conventional HVT(High Voltage Transformer) method. Also, it may be adjusted power levels of the microwave oven by a frequency control. In this paper, operational principles are explained in detail in order to understand the circuit operation. Also, a proto-type Inverter circuit with 1[kW] Power consumption is built and tested for verifying the operation.

A Study on the Optimization of Induction Heating System for Using Half-Bridge High-Frequency Series Resonant Inverter (Half-Bridge 고주파 직렬 공진형 인버터를 이용한 유도가열 시스템의 최적화에 관한 연구)

  • Kim, Chul-Ho;Shin, Dae-Cheul;Kwon, Hyuk-Min;Kim, Kee-Hwan;Kim, Yong-Ju
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.78-80
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    • 2005
  • This paper is described the stability and optimization according to each load of induction heating system for using half-bridge high-frequency series resonant inverter. Each metallic package is inserted into the ceramic type vessel with external working coil. This working coil is connected to the resonant inverter. It evaluates performance and stability of this system according to metallic package.

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A Study on Modeling of High-Frequency Leakage Currents in PWM Inverter Feeding an Induction Motor (유도전동기의 PWM제어와 누설 축전류 발생 모델링에 관한 연구)

  • 이재호;임경내;전진휘;박성준;김철우
    • Proceedings of the KIPE Conference
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    • 1998.07a
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    • pp.221-224
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    • 1998
  • A PWM inverter with an induction motor often has a problem with a high-frequency leakage current that flows through the distributed electrostatic capacitance from the motor windings to ground. This paper presents an equivalent circuit for high-frequency leakage currents in PWM inverter feeding an induction motor, which forms an LCR series resonant circuit.

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Power Conditioning System using LLC Resonant Inverter with Two Resonant Tanks (두개의 공진탱크회로를 갖는 LLC 공진 인버터 적용 PCS)

  • Yoon, Kwang-Ho;Chung, Bong-Gun;Lee, Kwang-Ho;Kim, Joo-Hoon;Kim, Eun-Soo;Choi, Joon-Young
    • The Transactions of the Korean Institute of Power Electronics
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    • v.15 no.6
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    • pp.477-486
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    • 2010
  • Recently, Power Conditioning System (PCS) tends to become more compact, and tends to require higher efficiency, and higher power density with better performance. To meet these requirements, a novel topology consisted of LLC resonant inverter with two resonant tanks for low power losses and Low Frequency (LF) cyclo-converter for sine wave filtering is proposed. The operating schemes are analyzed and described. A 400W proto product is built, tested and verified the performances by connecting the 110Vac 60Hz utility line.

Analysis Chatacteristics and Design of a Current-fed High Frequency inverter with Separated Resonant Capacitor (분할공진 콘덴서를 갖는 전류형 고주파 인버터의 특성해석과 설계)

  • 이봉섭;김동희
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.12 no.2
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    • pp.91-98
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    • 1998
  • The current-fed high frequency inverter with separated parallel resonant capacitor is presented in this paper. The analysis of the proposed circuit is generally described by using normalized parameter, and are evaluated characteristics of the circuit.In addition, this paper proves the propriety of theoretical analysis in terms of the experimental waveforms using the switching device MOSFET. In the future, the proposed inverter will expected that it can be practically used as the high frequency power source for induction heating etc.ng etc.

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A Study on the High Voltage CCPS Using a Resonant Frequency Tracking Type Series Resonant Inverter (공진주파수 추적형 직렬공진 인버터를 이용한 고전압 CCPS에 관한 연구)

  • Rho, Sung-Chan;Kim, Youn-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.19 no.7
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    • pp.107-112
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    • 2005
  • RThis paper presents a high voltage capacitor charging power supply(CCPS) using a series resonant inverter. The CCPS adopted a 45[kHz] IGBT series resonant inverter using PLL control and a high-efficiency, high-voltage transformer. The performance test of the CCPS was carried out with a 14 nF load capacitor at 100[kV] output voltage and 200[Hz] repetition rate. Peak power rate of 18.75[kJ/sec] and charging time of 4.5[mS].

Development of Induction Heated Hot Water Producer using Soft Switching PWM High Frequency Inverter

  • Fujita Kentarou;Moisseev Serguei;Gaimage Laknath;Chandhaket Sarawouth;Muraoka Hidekazu;Nakaoka Mutsuo
    • Proceedings of the KIPE Conference
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    • 2003.07b
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    • pp.491-494
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    • 2003
  • This paper presents a new conceptual electromagnetic induction eddy current-based stainless steel plate spiral type heater for heat exchanger or Dual Packs Heater in hot water producer, boiler steamer and super heated steamer, which is more suitable and acceptable for new generation consumer power applications. In addition, all active clamped edge resonant PWM high frequency inverter using trench gate IGBTs power module can operate under a principle oi zero voltage soft communication with PWM is developed and demonstrated for a high efficient Induction heated hot water producer and boiler in the consumer power applications. This consumer induction heater power appliance using active clamp soft switching PWM high frequency inverter is evaluated and discussed on the basis of the simulation and experimental results.

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Digital Power Control of LLC Resonant Inverter for Microwave Oven (전자레인지용 LLC 공진형 인버터의 디지털 출력 제어)

  • Kang, Kyelyong;Kim, Heung-Geun;Cha, Honnyong
    • The Transactions of the Korean Institute of Power Electronics
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    • v.22 no.5
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    • pp.457-462
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    • 2017
  • This paper proposes a digital power control of the LLC resonant half-bridge inverter for high power microwave oven application. Conventional half-bridge inverter for driving a microwave oven uses a hardware-based power control method which varies the frequency according to the AC source voltage. In this case, it is difficult to control the output power according to the variation of the load status of magnetron. The proposed power control consists of an instantaneous current generator and a current controller. Instantaneous current generator makes an instantaneous current reference from power command using input voltage information. Current controller controls input current which has an information of status of magnetron. The proposed power control does not require any compensation algorithm for the change of the load status of the magnetron and change of input voltage. The validity of the proposed method for the control of the change of input voltage and frequency is verified by both simulation and experiment.

Electromagnetic Indirect Induction Fluid Heating System using Series Resonant PWM Inverter and Its Performance Evaluations (직렬공진 PWM인버터를 이용한 전자간절유도가열 열유체 에너지시스템과 그 성능평가)

  • 김용주;김기환;신대철
    • The Transactions of the Korean Institute of Power Electronics
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    • v.7 no.1
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    • pp.48-54
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    • 2002
  • This paper is described the indirect induction heated boiler and induction heated hot air producer using the voltage-fed series resonant high-frequency inverter which can operate in the frequency range from 20 kHz to 50 kHz. A specially designed induction heater is composed of laminated stainless plates, which have many tiny holes and are interconnected by spot welding. This heater is inserted into the ceramic type vessel with external working coil. This working coil is connected to the inverter and turbulence fluid through this induction heater to moving fluid generates in the vessel. The operating performances of this unique appliance in next generation and its effectiveness are evaluated and discussed from a practical point of view.