Results 191 to 200 of about 11,901 (212)

Kříž zv. královny Dagmar

2021
At the end of the 17th century, a small enameled cross was discovered in one of the royal graves in Saint Bendt's church in Danish Ringsted. According to the record of the administrator of the Danish Royal Treasury, the cross was found in the grave of the Danish Queen Dagmar - the daughter of the King of Bohemia, Ottokar I (+1230).
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A new ZC-ZVS forward converter

Proceedings of Applied Power Electronics Conference. APEC '96, 2002
This paper presents a steady-state analysis with complete characterization of ZCS-ZVS forward power converter operation. The nondissipative snubber associated with a forward power converter provides the soft commutation switching. The proposed approach allows building a converter with high frequency operation.
A.A. Pereira, E.A.A. Coelho, V.J. Farias, L.C. de Freitas, J.B. Vieira   +4 more
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Newly Designed ZVS Multi-Input Converter

IEEE Transactions on Industrial Electronics, 2011
A newly designed zero-voltage-switching (ZVS) multi-input converter is proposed in this paper. The converter can boost the different voltages of two power sources to a stable output voltage. An auxiliary circuit is employed for achieving turn-on ZVS of all switches in the proposed converter.
Rong-Jong Wai, Chung-You Lin, Jun-Jie Liaw, Yung-Ruei Chang   +3 more
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A buck ZC-ZVS PWM converter

Proceedings of 1994 Power Electronics Specialist Conference - PESC'94, 2002
This paper presents a buck DC to DC power converter, whose features are zero voltage and zero current switching, operation at constant frequency, regulation by pulse width modulation and low RMS current stresses on active devices. The main goal of this topology when compared with the classical ZVS-PWM one is the ability to work with a wide load range ...
H.L. Hey, L. Matias, J.B. Viera
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A simple clamped ZVS PWM converter

Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,, 2002
A buck derived power converter which accomplishes clamped zero voltage switching at both turn on and turn off transitions while maintaining low core and conduction losses is described. The converter provides output isolation and can be simply extended to multi-output applications and other-than-buck topologies.
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Optimized EPS Control to Achieve Full Load Range ZVS With Seamless Transition for Dual Active Bridge Converters

IEEE transactions on industrial electronics (1982. Print), 2021
Guo Xu, Liting Li, Xiaoying Chen, Yonglu Liu, Yao Sun, M. Su   +5 more
semanticscholar   +1 more source

A Hybrid Control Strategy of LCC-S Compensated WPT System for Wide Output Voltage and ZVS Range With Minimized Reactive Current

IEEE transactions on industrial electronics (1982. Print), 2021
Xiaoqiang Wang, Jianping Xu, Minrui Leng, Hongbo Ma, Shuze He   +4 more
semanticscholar   +1 more source

Asymmetric Half-Bridge ZVS-PWM Converter

2018
The aim of this chapter is to provide the reader with knowledge about the asymmetric half-bridge zero voltage switching, pulse width modulation, converter (A-HB-ZVS-PWM). After the presentation of the power converter topology, the qualitative analysis is done, which includes the description of operation, topological states for each time interval and ...
Ivo Barbi, Fabiana Pöttker
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A Hybrid Mode Control Strategy for LCC–LCC- Compensated WPT System With Wide ZVS Operation

IEEE transactions on power electronics, 2022
Na Fu, Junjun Deng, Zhenpo Wang, Wenbo Wang, Shuo Wang   +4 more
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An Asymmetrical DAB Converter Modulation and Control Systems to Extend the ZVS Range and Improve Efficiency

IEEE transactions on power electronics, 2022
Morteza Mahdavifard, Neda Mazloum, Faizah Zahin, Amin KhakparvarYazdi, Alireza Abasian, S. A. Khajehoddin   +5 more
semanticscholar   +1 more source