Results 111 to 120 of about 992 (139)

A novel passive lossless snubber for high power multilevel inverters

APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335), 2003
A novel passive lossless snubber circuit for multilevel inverters is proposed in the paper. The topology of it is simple and requires no extra control. In order to reduce the high voltage stress on power switches of multilevel inverters with the proposed snubber circuit, an improved snubber circuit is presented by adding separate low-power DC sources ...
null Hongyang Wu, null Yan Deng, null Rongxiang Zhao, null Xiangning He   +3 more
openaire   +1 more source

Active-Clamp Forward Converter With Lossless-Snubber on Secondary-Side

IEEE Transactions on Power Electronics, 2019
This paper proposes a novel active-clamp forward converter (ACFC) with a lossless-snubber on the secondary-side, which combines a resonant capacitor and a clamping diode with an output inductor in parallel. The conventional ACFC achieves zero-voltage-switching on switches of the primary-side during dead time for reducing the switching loss and voltage ...
Jing-Yuan Lin, Sih-Yi Lee, Chung-Yi Ting, Fu-Ciao Syu   +3 more
openaire   +2 more sources

An improved lossless passive snubber cell for PFC boost converter

2013 3rd International Conference on Electric Power and Energy Conversion Systems, 2013
An improved lossless passive snubber cell for power factor correction (PFC) boost converter is proposed. All of the semiconductor devices in the boost converter are operated under soft switching condition. The switch operates at zero current switching (ZCS) turn on and zero voltage switching (ZVS) turn off.
Yesilyurt, Huseyin, BODUR, Hacı, Ozel, Hatice   +2 more
openaire   +2 more sources

A novel passive lossless soft-switching snubber for PWM inverters

2009 Chinese Control and Decision Conference, 2009
This paper presents a novel passive lossless snubber circuit for pulse-width modulation (PWM) inverters to achieve soft-switching purposes without an extra switch and additional control circuitry. This novel passive lossless soft-switching snubber employs an inductor/capacitor snubber circuit for each switching device in an inverter to achieve passive ...
null Wang Qiang, null Zhang Huaguang, null Chu Enhui, null Hou Limin   +3 more
openaire   +1 more source

Passive lossless snubber for CCM PFC based on magnetic coupling

2011 International Conference on Electrical Machines and Systems, 2011
Boost converter is the most popular topology in power factor corrector (PFC), which contains a switch and a diode. However the reverse recovery characteristic of silicon material diode enlarges the turning-on power losses of switch. In this paper, a novel passive lossless snubber based on magnetic coupling is proposed for continuous conduction mode ...
Qinglin Zhao, Jianyong Zhang, Chuang Zhao   +2 more
openaire   +1 more source

A novel four-level PFC circuit with passive lossless snubber

2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004
For high power and/or high voltage applications, in order to reduce the voltage of switches and the size of the inductor, and to improve converter efficiency and power density, the single-phase four-level power factor correction converter is presented in the paper, its operation principle and control method are analyzed in detail. A 2 KW four-level PFC
null Hongyan Wang, null Lifeng Chen, null Hong Jiang, null Xiangning He   +3 more
openaire   +1 more source

Analysis and measurements on a PWM DC-DC converter with lossless snubbers

Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting, 2002
Analysis and measurements are used to demonstrate the advantages and disadvantages of a promising DC-DC power converter topology with lossless snubbers. With the snubbers the total transistor and diode losses are shown to be much less than in hard switching when the load current is large, and equal to or less than in hard switching when the load ...
G.J. Torvetjonn, A. Petterteig, T.M. Undeland   +2 more
openaire   +1 more source

A lossless snubber for DC/DC converters and its application in PFC

Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435), 2002
A passive lossless snubber is proposed in this paper to reduce switching losses and EMI noise by restricting di/dt and dv/dt of the switching device. As an example, a boost convertor with the lossless snubber is presented to illustrate the operation principle and theoretical analysis in details.
null Xuezhi Wu, null Xinmin Jin, null Lipei Huang, null Guang Feng   +3 more
openaire   +1 more source

A push-pull voltage source inverter with lossless snubber circuits

Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475), 1999
This paper proposes a push-pull voltage source inverter with lossless snubbers. The output voltage waveform of the inverter can be modulated as either square wave or SPWM. The energy stored in the leakage inductor of the transformer can be fed back to the DC supply through the snubber circuits when main switching devices change their states.
C.Y. Liu, J.G. Zhu, V.S. Ramsden
openaire   +1 more source

A passive lossless snubber cell with minimum stress and wide soft-switching range

2009 IEEE Energy Conversion Congress and Exposition, 2009
A passive lossless snubber cell and its dual structure for reducing the switching loss of a range of switching converters are presented. The proposed snubber cell has several advantages over existing snubbering techniques. First, it provides zero-current-switching (ZCS) and zero-voltage-switching (ZVS) conditions for turning on and off, respectively ...
River T H Li, Henry Shu-hung Chung
openaire   +1 more source