Search Results 1-20 of 95

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  • Design Challenges of SiC Devices for Low- and Medium-Voltage DC-DC Converters

    Engelmann Georges , Sewergin Alexander , Neubert Markus , Doncker Rik W. De

    … Besides their high temperature capability and low conduction losses, they provide superior switching characteristics. … This paper emphasizes the design challenges of SiC devices in the low- and medium-voltage ranges arising from their fast switching speeds. … First, detailed measurement results on the switching characteristics of 1200 V SiC devices and the different leakage inductances are presented. …

    IEEJ Journal of Industry Applications 8(3), 505-511, 2019

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  • Isolated AC/DC Converter Using Soft-Switching Technique  [in Japanese]

    Suzuki Kazuma , Isozaki Junpei , Kitagawa Wataru , Takeshita Takaharu

    … This paper presents a high-frequency isolated AC/DC converter using the soft-switching technique. … In order to reduce the switching loss, soft switching at every commutation of the matrix converter and AC/DC converter is achieved. …

    IEEJ Transactions on Industry Applications 136(8), 540-548, 2016

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  • The condition for success of softswitching with LLC converter  [in Japanese]

    Urayama Dai , Hirachi Katsuya

    … The switching of LLC converter becomes hard switching at the time of overload. … In this study, we elucidated the mechanism of hard switching and the current path. … The reason of hard switching is the commutation of magnetizing current to the secondary side. … In this way, it becomes possible to judge the success or failure of soft switching from the circuit constants. …

    Journal of the Japan Institute of Power Electronics 41(0), 25-33, 2015

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  • Improvement of Power Conversion Efficiency of Soft-Switching Inverter in Range of Low Output Power by Adjustable Dead Time Control  [in Japanese]

    HOSHI Nobukazu , MATSUI Ayaka

    … The power conversion efficiency of soft-switching inverter can be improved by using loss-less snubber commutation; … As a solution to this problem, adjustable dead time control that involves adjusting the dead time in a loss-less snubber commutation according to the magnitude of output current has been proposed. …

    IEEJ Transactions on Industry Applications 131(5), 679-684, 2011-05-01

    J-STAGE  References (7) Cited by (5)

  • Practical Evaluations of a Novel Asymmetrical ZCS-PWM DC-DC Converter with High-Frequency Transformer-Link  [in Japanese]

    MISHIMA Tomokazu , HIRAKI Eiji , NAKAOKA Mutsuo

    … This paper presents a novel Zero Current Switching (ZCS)-PWM controlled half-bridge DC-DC converter with High-Frequency (HF)-link. … The newly-proposed soft switching DC-DC converter consists of a multi-resonant half-bridge HF-isolated inverter controlled by an asymmetrical PWM scheme and a center-tapped diode rectifier with a choke input filter. …

    IEEJ Transactions on Industry Applications 130(5), 605-613, 2010-05-01

    J-STAGE  References (14)

  • A Novel Half-Bridge Asymmetrical ZCS-PWM DC-DC Converter with High Frequency-Link

    MISHIMA Tomokazu , HIRAKI Eiji , TANAKA Toshihiko , NAKAOKA Mutsuo

    … A novel zero current soft-switching (ZCS)-PWM cell-assisted half-bridge DC-DC converter topology with a high frequency link is proposed in this paper. … In order to attain the wide range of ZCS-PWM operation in the primary-side HF inverter, an active edge resonant snubber cell composed by a switched capacitor and a lossless inductor is adopted in the half-bridge leg, providing ZCS commutation for a wide range of output power. …

    IEEJ Transactions on Industry Applications 128(4), 388-395, 2008-04-01

    J-STAGE  References (7) Cited by (4)

  • A Novel Phase-Shifted PWM Zero-Vblatge Zero-Current Switching Three-Level DC-DC Converter with Circulating Current Reduction Scheme

    Mishima Tomokazu , Morimoto Keiki , Nakaoka Mutsuo

    … A novel soft-switching Three-Level (TL) DC-DC converter with phase-shift PWM scheme is presented in this paper. … This converter performs Zero Voltage and Zero Current Soft-Switching commutation (ZVZCS) with assist of the tapped inductor output filter in the secondary-side rectifier of the High-Frequency (HF) transformer. …

    Journal of the Japan Institute of Power Electronics 34(0), 111-119, 2008

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  • Soft-Switching PWM-SEPP High-Frequency Inverter with Single ZCS Cell for IH Cooking Heater

    Miura Yuta , Atsushi Fujita , Omori Hideki , Hiraki Eiji , Nakaoka Mutsuo

    … In this paper, multi-resonant zero current soft switching (ZCS) -PWM single ended push pull (SEPP) high frequency inverter is newly demonstrated for consumer induction heating (IH) appliances. … The proposed inverter circuit has a novel ZCS cell consisting of high side main switch with lossless inductor snubber and active edge-resonant commutation cell (AERCC). …

    Journal of the Japan Institute of Power Electronics 34(0), 103-110, 2008

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  • DC-DC Converter using Half-Bridge Soft Switching PWM Inverter for Arc Welder  [in Japanese]

    MORIMOTO Keiki , DOI Toshimitsu , MANABE Haruhiko , LEE Hyun-Woo , NAKAOKA Mutsuo

    … This paper presents a new circuit topology of dc bus line side active resonant snubber assisted voltage source high frequency link soft switching PWM half-bridge inverter type dc-dc power converter for arc welder. … The proposed power converter is composed of a typical voltage source-fed half-bridge high frequency PWM inverter with a high frequency transformer link in addition to two dc bus line side power semiconductor switching devices for PWM control scheme and two capacitive lossless snubbers. …

    The Journal of the Institute of Electrical Installation Engineers of Japan 27(8), 669-678, 2007-08-10

    J-STAGE  References (13)

  • The State-of-The Art Technology of Consumer Induction Heating Applied Power Appliances

    Guo Bin , Shinichiro Sumiyoshi , Okude Takaaki , Omori Hideki

    … The bridge arm side link passive capacitive snubbers in parallel with each and AC load side linked active edge inductive snubber-assisted series load resonant soft switching inverter with a phase shifted PWM control scheme is evaluated and discussed on the basis of the simulation and experimental results. …

    Journal of the Japan Institute of Power Electronics 33(0), 62-70, 2007

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  • A Novel Prototype of Active Auxiliary Edge-Resonant Snubber-assisted ZCS-PWM DC-DC Converter-Evaluation on Operation Characteristics

    Mishima Tomokazu , Hiraki Eiji , Nakaoka Mutsuo

    … A novel prototype of a soft-switching PWM DC-DC converter is presented in this paper. … This converter consists of a half-bridge circuit assisted with an active edge resonant snubber for Zero Current Soft-switching (ZCS) commutation, and a current doubles rectifier linked with a high-frequency transformer. …

    Journal of the Japan Institute of Power Electronics 33(0), 157-163, 2007

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  • Latest Development of A Novel Half Bridge Soft Switching PWM Inverter-Fed DC-DC Converter for Arc Welding Machines

    Doi Toshimitsu , Morimoto Keiki , Manabe Haruhiko , Mishima Tomokazu , Nakaoka Mutsuo

    … This paper presents a new DC-DC converter circuit topology using voltage source-fed soft-switching PWM high frequency inverter with half-bridge configuration. … This type of DC-DC converter circuit has two semiconductor switching devices in series with high and low DC buslines, two lossless snubbing capacitors in parallel with two connected additional diode components. …

    Journal of the Japan Institute of Power Electronics 33(0), 141-149, 2007

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  • Advanced High Power DC-DC Converter using A Novel Type Voltage Source Full-Bridge Soft-Switching PWM Inverter with High Frequency Transformer Link for Arc Welding Applications  [in Japanese]

    MORIMOTO Keiki , DOI Toshimitsu , MANABE Haruhiko , AHMED Tarek , HIRAKI Eiji , LEE Hyun-Woo , NAKAOKA Mutsuo

    … This paper presents a new circuit topology of full-bridge soft-switching PWM inverter linked DC-DC power converter composed of conventional full-bridge high frequency PWM inverter with high frequency transformer and an active quasi-resonant snubber consisting of an additional power switching device in series with DC busline and a lossless capacitor in parallel with DC busline. …

    IEEJ Transactions on Industry Applications 126(3), 237-247, 2006-03-01

    J-STAGE  References (14) Cited by (2)

  • A Novel Soft-Switching PWM HB DC-DC Converter with DC Rail High and Low Side Active Edge Resonant Snubbers Assisted by High Frequency Transformer Parasitic Components

    AHMED Nabil A. , FATHY Khairy , MORIMOTO Keiki , HIRAKI Eiji , LEE Hyun Woo , NAKAOKA Mutsuo

    … This paper presents a new circuit topology of active edge resonant snubbers assisted half-bridge soft switching PWM inverter type dc-dc high power converter for DC bus feeding power plants. … The proposed dc-dc power converter is composed of typical voltage source fed half-bridge high frequency PWM inverter with a high frequency transformer planar link in addition to do busline side power semiconductor switching devices for PWM control scheme and parallel capacitive lossless snubbers. …

    IEICE technical report 105(601), 133-137, 2006-02-16

    References (10)

  • Characteristic Evaluations of Three-Phase AC-AC Direct Converter with PFC Function  [in Japanese]

    NAKAO Masahiro , HIRAKI Eiji , TANAKA Toshihiko , NAKAOKA Mutsuo

    … This paper presents a soft switching duty factor controlled AC-AC direct conversion circuit for high frequency Induction Heated applications, which have unity power factor and sinewave line current shaping functions. …

    IEICE technical report 105(601), 127-132, 2006-02-16

    References (5) Cited by (2)

  • Bi-directional Three-phase Current-Source PWM Inverter Introducing Zero-Current Soft-Switching Technique  [in Japanese]

    KINJYO Tatsuto , SENJYU Tomonobu , URASAKI Naomitsu , FUJITA Hideki

    … Although power semiconductor devices such as IGBTs and GTOs have been widely used for high power industrial applications, turn-off losses of those devices due to the current tail characteristics dominate their total switching losses. …

    IEEJ Transactions on Power and Energy 125(12), 1288-1297, 2005-12-01

    J-STAGE  References (12) Cited by (2)

  • Active Voltage Clamped Quasi-Resonant PWM High Frequency AC Power Frequency Converter using Bidirectional Power Switches  [in Japanese]

    SUGIMURA Hisayuki , FATHEY Khiry , LEE Hyun Woo , NAKAOKA Mutsuo

    … This paper presents a utility frequency AC to high frequency AC direct power frequency conversion pulse modulated conditioning circuit using bidirectional power switches, which can efficiently operate under a principle of active zero voltage clamped soft commutation for consumer induction heating (IH) fixing roller for copy machine and printer. … Its operating principle is described using switching mode equivalent circuits. …

    Technical report of IEICE. Energy engineering in electronics and communications 105(269), 13-18, 2005-09-09

    Cited by (2)

  • A ZVS PWM Inverter with Active Voltage Clamping Technique Using Only a Single Auxiliary Switch

    MEZAROBA Marcello , MARTINS Denizar Cruz , BARBI Ivo

    … Conduction and switching losses are reduced due to implementation of the simple active snubber circuit, that provides ZVS conditions for all switches, including the auxiliary one. …

    IEEJ Transactions on Industry Applications 125(8), 767-773, 2005-08-01

    J-STAGE  References (16)

  • High Frequency Multi-Resonant PWM Controlled Power Frequency Converter using One Chip Reverse Blocking IGBTs based Bidirectional Switch  [in Japanese]

    SUGIMURA Hisayuki , MOHAMAD EID Ahmad , LEE Hyun-Woo , NAKAOKA Mutsuo

    電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術 105(197), 73-78, 2005-07-14

    References (2)

  • Development of Advanced High Power DC-DC Converter using Soft-Switching PWM Inverter with High Frequency Transformer Link for Low Voltage and Large Current Output Applications  [in Japanese]

    Doi Toshimitsu , Morimoto Keiki , Manabe Haruhiko , Lee Hyun Woo , Nakaoka Mutsuo

    … This paper presents a new circuit topology of voltage source full-bridge type soft-switching PWM inverter linked DC-DC converter composed of conventional voltage-fed full-bridge PWM inverter, leakage inductance based high frequency transformer with center tapped secondary winding, an additional power semiconductor switching device in series with DC busline and a lossless snubbing quasi-resonant capacitor in parallel with DC busline in input converter side of full-bridge inverter circuit. …

    Technical report of IEICE. Energy engineering in electronics and communications 105(197), 79-84, 2005-07-14

    References (9)

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