Novel zero-voltage-transition PWM converters

Hua, Guichao; Leu, Ching-Shan; Lee, F.C.

doi:10.1109/pesc.1992.254691

Cited by 384 publications

(155 citation statements)

References 11 publications

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“…To achieve the high efficiency boost converter used in the FCEV application, a resonant scheme ZVT (Zero Voltage Transition) converter (1) shown in Fig. 1(a) seems attractive.…”

Section: Feasibility Of Active Switch Soft Switching Topologymentioning

confidence: 99%

8 kW QRAS Chopper using SiC Schottky Diode

2006

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Keywords: silicon carbide schottky barrier diode, peak recovery current I RRM , reverse recovery time t rr , DC-DC converter, soft switching This paper describes a study targeting a 100 kW power range converter to the fuel cell electric vehicle (FCEV). The proposed power converter offers the solutions in both high-power and high-efficiency applications. The power supply consists of new topologies based on Quasi-resonant Regenerating Active Snubber (QRAS) and new devices "SiC schottky diodes", which are already on the market as the next generation of power devices substituted for Si semiconductor devices approaching the theoretical limits of the Si material. The configuration and the performance of 8 kW one-tenth-prototype SiC-QRAS are followed by this report on the successful test evaluation results.In this paper 8 kW prototype-model using IGBTs was made as shown in Fig. 1. We parallel four SiC schottky diodes to increase the current capability to 40 A and assembled it as the output diode D 5 . We tested it and evaluated the effect in the improvement of the efficiency by two fields: new circuit topology and new devices. 98.5% SiC-QRAS was comparatively evaluated from a point of view of the principal difference of the reverse recovery performance. The prototype SiC-QRAS was tested and compared with the conventional Si-QRAS. The output power of 8 kW with the efficiency of about 98.5% was obtained. Fig. 3 shows the result of SiC and Si loss breakdown (measured). Total loss reduction P LM , measured by means of VOAC7413 Iwatsu digital multi-meters, 2011 Yokogawa DC Ammeters and 2215. Yokogawa shunts, is 77 W (= 210 − 133). On the other hand total loss reduction P LP , measured by means of a DA1855A Lecroy high precision differential amplifier, a DXC100A Lecroy probe and WAVEPRO950 Lecroy digital oscilloscope, is 65.5 W (= 257.1 − 191.6). So loss reduction rate proved about 1% in each case. This time we confirmed that SiC-SBD reduced the dynamic power losses drastically and it had been achieved by means of new circuit topology QRAS. Atsuo Kawamura * * Member This paper describes a study targeting a 100 kW power range converter to the fuel cell electric vehicle (FCEV). The proposed power converter offers the solutions in both high-power and high-efficiency applications. The power supply consists of new topologies based on Quasi-resonant Regenerating Active Snubber (QRAS) and new devices "SiC schottky diodes", which are already on the market as the next generation of power devices substituted for Si semiconductor devices approaching the theoretical limits of the Si material. The configuration and the performance of 8 kW one-tenth-prototype SiC-QRAS are followed by this report on the successful test evaluation results.

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“…To achieve the high efficiency boost converter used in the FCEV application, a resonant scheme ZVT (Zero Voltage Transition) converter (1) shown in Fig. 1(a) seems attractive.…”

Section: Feasibility Of Active Switch Soft Switching Topologymentioning

confidence: 99%

8 kW QRAS Chopper using SiC Schottky Diode

2006

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“…With the power system development, high-capacity battery batteries pack more and more widely applied [3]. In view of this, this article has designed a new DSP-based intelligent high-capacity battery discharging device that feedback energy.…”

Section: Introductionmentioning

confidence: 99%

Analysis on large-capacity storage battery discharge of intelligent energy-feedback device

Liu¹,

Song²,

Zhou³

2016

Proceedings of the 2016 International Forum on Management, Education and Information Technology Application

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Abstract-The reliability of DC operating power is largely decided by the storage battery in power system. In order to satisfy large-capacity storage battery discharge demand and requirements for energy-saving and emission-reduction, a new intelligent battery discharging device that can feedback energy was designed. The device is introduced in details including the circuit structure, parameters design and control methods in this paper. The experimental results indicate that the device has a good discharge performance, small discharge ripples, good stability and reliability, convenient and visual monitoring, and a good engineering application value.

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“…High switching frequency operation, however, results in higher switching losses, increased electromagnetic interference (EMI), and reduced converter efficiency. Numerous soft-switching techniques have been proposed to correct these problems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Almost all these techniques achieve soft switching condition in the main switch using an active auxiliary circuit.…”

Section: Introductionmentioning

confidence: 99%

“…For improving these problems, various forms of softswitching techniques for forward converter have been proposed [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Analysis, Design and Implementation of an Improved ZVZCS-PWM Forward converter

Soltanzadeh¹,

Dehghani²,

Khalilian³

2014

Journal of Electrical Engineering and Technology

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-In this paper an Improved Zero Voltage Zero Current Pulse Width Modulation Forward converter which employs a simple resonance snubber circuit is introduced. A simple snubber circuit consists of a capacitor, an inductor and two diodes. In proposed converter, switch Q1 operates at ZCS turn-on, and ZVS turn-off conditions and all-passive semiconductor devices operate at ZVZCS turn-on and turn-off state. The proposed converter is analyzed and various operating modes of the ZVZCS-PWM forward converter are discussed. Analysis and design considerations are presented and the prototype experimental results of a 100w (40 V/2.5A) proposed converter operating at 30 KHz switching frequency confirm the validity of theoretical analysis.

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Novel zero-voltage-transition PWM converters

Cited by 384 publications

References 11 publications

8 kW QRAS Chopper using SiC Schottky Diode

8 kW QRAS Chopper using SiC Schottky Diode

Analysis on large-capacity storage battery discharge of intelligent energy-feedback device

Analysis, Design and Implementation of an Improved ZVZCS-PWM Forward converter

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