Results 261 to 270 of about 531,568 (306)
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Zero-current zero-voltage switching for on-load tap changers
5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010), 2010We present a new on-load tap changer (OLTC) design that provides the traditional advantages of the semiconductor-assisted OLTC over the classic, mechanical OLTC. The design provides zero-current, zero-voltage operation of both diverter switches at all times, eliminating contact wear due to arcing.
D.J. Rogers, T.C. Green
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A zero-voltage zero-current soft switching DC/DC converter
Frontiers of Electrical and Electronic Engineering in China, 2006A novel three-level zero-voltage zero-current switching (ZVZCS) DC/DC converter is proposed in this paper. A tapped-inductor is used to replace the normal output filter inductor, so that the circulating current in the zero-state can be reset to zero. The reset voltage and the reset time can be set conveniently just by simply changing the winding ratio ...
Zheng-shi Wang +3 more
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A new zero-current-switching bridgeless PFC
2010 1st Power Electronic & Drive Systems & Technologies Conference (PEDSTC), 2010This paper presents a new ZCS single phase bridgeless PFC which uses an auxiliary circuit for achieving zero current switching conditions for all switches of conventional bridgeless PFC. The input current is controlled by a peak current controller and output voltage is controlled with a limited band pi controller.
M. Ramezani, S. M. Madani
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Novel zero-current-switching (ZCS) PWM converters
IEE Proceedings - Electric Power Applications, 2005A new family of zero-current-switching (ZCS) pulse-width-modulated (PWM) converters which uses a new ZCS PWM switch cell is presented in this paper. The main switch and auxiliary switch operate at zero-current-switching turn on and turn off, and the all passive semiconductor devices in the ZCS-PWM converter operate at zero-voltage-switching (ZVS) turn ...
C.-M. Wang, H.-J. Chiu, D.-R. Chen
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IEEE Transactions on Industrial Electronics, 2004
A new family of zero-current-switching (ZCS) pulsewidth-modulated (PWM) converters using a new ZCS-PWM auxiliary circuit is presented in this paper. The main switch and auxiliary switch operate at zero-current-switching turn on and turn off, and the all passive semiconductor devices in the ZCS-PWM converters operate at zero-voltage-switching (ZVS) turn
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A new family of zero-current-switching (ZCS) pulsewidth-modulated (PWM) converters using a new ZCS-PWM auxiliary circuit is presented in this paper. The main switch and auxiliary switch operate at zero-current-switching turn on and turn off, and the all passive semiconductor devices in the ZCS-PWM converters operate at zero-voltage-switching (ZVS) turn
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Zero-current-switching PWM dc/dc converters
38th Midwest Symposium on Circuits and Systems. Proceedings, 2002An existing idea for a ZCS quasi-resonant converter was extended to generate families of zero-current-switching PWM dc/dc converters. The converter output voltage is regulated by controlling turn on of the auxiliary switch while both main and auxiliary switches maintain the ZCS and/or ZVS condition during the constant frequency operation.
E.R.C. da Silva +2 more
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Active-Clamped Zero-Current Switching Current-Fed Half-Bridge Converter
IEEE Transactions on Power Electronics, 2020This article presents an auxiliary circuit for the current-fed half-bridge (CFHB) converter, aiming to clamp the high voltage spikes across the main switches caused by the energy stored in the leakage inductance of the transformer. This circuit also provides zero-current switching (ZCS) to the main switches at turn- off . Moreover, the rectifier diodes
Cassiano Ferro Moraes +4 more
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Zero Current Synchronization of Opening Switch Contacts
IEEE Transactions on Components, Hybrids, and Manufacturing Technology, 1986Thermostatic controls switching ac loads at 220 V, 50 Hz consist of a slowly moving thermally activated prime mover operating randomly on a small snap-action switch. An experimental study on the opening characteristic of the snap-action switch has shown that the point on the current wave at which contact separation occurs becomes nonrandom on its ...
P. White, D. Mapps, G. Rossi
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Zero current switching Type Class DE rectifier
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012This paper introduces a zero current switching (ZCS) type Class DE rectifier, along with design procedure, simulation and experimental results. The feature of ZCS type Class DE rectifier is that the diodes maintain ZCS and zero current derivative switching (ZCDS), therefore, switching losses and switching noise are reduced.
Tsukasa Misawa +2 more
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A zero voltage and zero current switching three level DC/DC converter
APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058), 2002This paper presents a novel zero voltage and zero current switching (ZVZCS) three-Level (TL) DC/DC power converter. This converter overcomes the drawbacks presented by the conventional zero voltage switching (ZVS) three-level converter, such as high circulating energy, severe parasitic ringing on the rectifier diodes, and limited ZVS load range for the
F. Canales, P. Barbosa, F.C. Lee
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