Results 261 to 270 of about 532,990 (304)
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Three-phase sinusoidal current rectifier with zero-current switching
IEEE Transactions on Power Electronics, 1995This paper presents the application of zero-current switching in a three-phase rectification scheme with nearly sinusoidal line currents. The principle of third harmonic current circulation is used to reduce the distortion in the line currents. Zero-current switching is accomplished with the use of only two switches.
M. Rastogi, N. Mohan, C.P. Henze
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Zero-voltage switching in switched current circuits
Proceedings of IEEE International Symposium on Circuits and Systems - ISCAS '94, 2002Traditionally the accuracy of switched-current circuits has been much lower than that of switched-capacitor circuits. To address this problem, an accurate high-speed switched-current sample-and-hold technique based on zero-voltage switching is presented.
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Proceedings of 1994 Power Electronics Specialist Conference - PESC'94, 2002
A high power IGBT tester, based on the typical clamped inductive load circuit and incorporating zero-voltage-transition and zero-current-transition soft-switching schemes, has been developed. Both turn-on losses, including the losses associated with reverse recovery of the clamp (free-wheeling) diode, and turn-off losses are measured and compared for ...
null Konrong Wang +3 more
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A high power IGBT tester, based on the typical clamped inductive load circuit and incorporating zero-voltage-transition and zero-current-transition soft-switching schemes, has been developed. Both turn-on losses, including the losses associated with reverse recovery of the clamp (free-wheeling) diode, and turn-off losses are measured and compared for ...
null Konrong Wang +3 more
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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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