• Title/Summary/Keyword: Soft-switched

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Soft-switching Current Source Inverter for Interconnection of Solar Cell with Power System (태양전지의 개통연계를 위한 소프트스위칭 전류원 인버터)

  • Choy, Young-Do;Park, Sang-Ho;Kim, Hee-Joong;Han, Byung-Moon
    • Proceedings of the KIEE Conference
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    • 2000.11b
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    • pp.345-347
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    • 2000
  • This paper proses a soft-switching current-source inverter with a switched-capacitor module. The system operation was analyzed by a theoretical approach with equivalent circuits and verified by a computer simulation and experiment. The proposed system could be effectively applied for the power converter of photovoltaic power generation interconnected with the power system.

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Quasi Resonant DC Link Inverter with a Simple Auxiliary Circuit

  • Amini, Mohammad Reza;Farzanehfard, Hosein
    • Journal of Power Electronics
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    • v.11 no.1
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    • pp.10-15
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    • 2011
  • In this paper, a new soft switching three phase inverter with a quasi-resonant dc-link is presented. The proposed inverter has a dc-link switch and an auxiliary switch. The inverter switches are turned on and off under zero voltage switching condition and all auxiliary circuit switches and diodes are also soft switched. The control utilizes PWM and the auxiliary switch does not require an isolated gate drive circuit. In this paper, the operation analysis and design considerations of the proposed soft switching inverter are discussed. The presented experimental results of a realized prototype confirm the theoretical analysis.

Soft Switching Three Phase Inverter with Two Auxiliary Switches

  • Mahdavi, Mohammad;Amini, Mohammad Reza;Emrani, Amin;Farzanehfa, Hosein
    • Journal of Power Electronics
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    • v.11 no.6
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    • pp.787-792
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    • 2011
  • In this paper, a new three phase soft switching inverter is presented. All of the semiconductor elements of this converter are soft switched. Employing only two auxiliary switches as DC-link switches and a simple control circuit are the advantages of the proposed inverter. The analytical equations and operating modes of the presented inverter are explained in details. The design considerations are presented and the experimental results verify the theoretical analysis.

A New High Power Factor ZVT-ZCT AC-DC Boost Converter

  • Ting, Naim Suleyman
    • Journal of Electrical Engineering and Technology
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    • v.13 no.4
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    • pp.1539-1548
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    • 2018
  • This paper introduces a new soft switched AC-DC boost converter with power factor correction (PFC). In the introduced converter, all devices are turned on and off under soft switching (SS). The main switch is turned on under zero voltage transition (ZVT) and turned off under zero current transition (ZCT). The main diode is turned on under zero voltage switching (ZVS) and turned off under zero current switching (ZCS). Meanwhile, there is not any current or voltage stress on the main devices. Besides, the auxiliary switch is turned on under ZCS and turned off under ZVS. The detailed theoretical analysis of the converter is presented, and also theoretical analysis is verified by a prototype with 100 kHz and 500 W. Also, the proposed converter has 99.8% power factor and 97.5% total efficiency at soft switching operation.

A 360Hz DC Ripple-Voltage Suppression Scheme in Three-Phase Soft-Switched Buck Converter (360Hz DC 리플-전압 감소기법을 사용한 3-Phase Soft-Switched Buck Converter)

  • Choi, Ju-Yeop;Ko, Jong-Jin;Song, Joong-Ho;Choy, Ick;Jeong, Seung-Gi
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.12
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    • pp.813-820
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    • 2000
  • A technique to suppress the low frequency ripple voltage of the DC output in three phase buck diode converter is presented in this paper. The proposed pulse frequency modulation methods and duty ratio modulation methods are employed to regulate the output voltage of the buck diode converter and guarantee zero-current-switching(ZCS) of the switch over the wide load range. The proposed control methods used in this paper provide generally good performance such as low THD of the input line current and unity power factor. In addition, control methods can be effectively used to suppress the low frequency ripple voltage appeared in the dc output voltage. The harmonic injection technique illustrates its validity and effectiveness through the simulations and experiments.

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Converter for Switched reluctance Motor Applied Soft Switching Mode by Partial Resonant Mothod (부분공진 소프트 수위칭기법을 적용한 스윗치드 리럭턴스 모터의 구공회로)

  • Kim, J.S.;Lee, B.D.;Kim, S.D.;Jung, G.H.;Kang, U.J.;Koh, H.S.;Lee, S.H.;Lee, H.W.
    • Proceedings of the KIEE Conference
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    • 1998.07f
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    • pp.2103-2105
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    • 1998
  • Switched Reluctance Motor is simple structure which used Accel/Decel application field because of cheap cost and High efficiency. For driving this motor, it is essential to need position sensor and driving converter. so, many topology and sensor have been studied untill now. Asymmetric Bridge Converter which has been known for the best control and efficiency is used chopping to control current of motor coil according to changing of motor speed. But this is embossed as a fault because it come to bring switching loss due to rapid switching frequency. In this paper, I applied to Soft Switching Mode by Partial Resonant Method to compensate these fault and to show the usabilityness of low switching device.

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New Soft-Switching Current Source Inverter for Photovoltaic Power System

  • Han Byung-Moon;Kim Hee-Joong;Baek Seung-Taek
    • Proceedings of the KIPE Conference
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    • 2001.10a
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    • pp.644-649
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    • 2001
  • This paper proposes a soft-switching current -source inverter for photovoltaic power system, which has an H-type switched-capacitor module composed of two semiconductor switches, two diodes, and an L-C resonant circuit. The operation of proposed system was analyzed by a theoretical approach with equivalent circuits and verified by computer simulations with SPICE and experimental works with a hardware prototype. The proposed system could be effectively applied for the power converter of photovoltaic power system interconnected with the power system.

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A Family of Zero Current and Zero Voltage Switching Bidirectional DC-DC Converter with Soft Switched Auxiliary Circuit (소프트 스위칭 방식의 보조 회로를 갖는 영전류 및 영전압 스위칭 양방향 DC-DC 컨버터)

  • Lee, Il-Ho;Kim, Jun-Gu;Kim, Jae-Hyung;Won, Chung-Yuen;Jung, Yong-Chae
    • Proceedings of the KIPE Conference
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    • 2011.07a
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    • pp.438-439
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    • 2011
  • In this paper, soft switching bidirectional DC-DC converter is proposed. The proposed topology is added two auxiliary switches, two resonant capacitors and one resonant inductor to convectional bidirectional DC-DC converter. Therefore, this proposed topology can reduce switching loss of each power switch by ZVS (Zero Voltage Switching) and ZCS (Zero Current Switching). We have performed mode analysis, simulation and experiment for the proposed topology.

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Soft-switching Current Source Inverter for Photovoltaic Power System (태양광 발전시스템을 위한 소프트스위칭 전류원 인버터)

  • Kim, Hee-Joong;Baek, Seung-Taek;Han, Byung-Moon
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.50 no.8
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    • pp.402-407
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    • 2001
  • This paper proposes a soft-switching current source inverter for photovoltaic power system, which has an H-type switched-capacitor module composed of two semiconductor switches, two diodes , and an L-C resonant circuit. The operation of proposed system was analyzed by a theoretical approach with equivalent circuits and verified by computer simulations with SPICE. The feasibility of hardware implementation was verified by experimental works with a prototype. The proposed system could by effectively applied for the photovoltaic power system with high efficiency.

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New Soft-Switching Current Source Inverter for a Photovoltaic Power System

  • Han, Byung-Moon;Kim, Hee-Jung;Baek, Seung-Taek
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.3B no.1
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    • pp.37-43
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    • 2003
  • This paper proposes a soft-switching current source inverter for a photovoltaic power system. The proposed inverter has an H-type switched-capacitor module composed of two semiconductor switches, two diodes, and an LC resonant circuit. The operation of the proposed system was analyzed by a theoretical approach with equivalent circuits and was verified by computer simulations with SPICE and experimental implementation with a hardware prototype. The proposed system could be effectively applied for the power converter of photovoltaic power system interconnected with the AC power system.