A high-efficiency DC-DC converter for high voltage DC input aeronautical static inverter
12 Dec 2005-pp 121-125
TL;DR: In this paper, the authors proposed a high-efficiency DC-DC converter for high voltage DC input aeronautical static inverter, which is composed of dual two-transistor forward DCDC converter (TTFC) coupled with a single high frequency transformer.
Abstract: This paper proposes a high-efficiency DC-DC converter for high voltage DC input aeronautical static inverter. The proposed converter is composed of dual two-transistor forward DC-DC converter (TTFC), coupled with a single high frequency transformer. The converter operates at a fixed duty cycle ratio near unity. Zero-voltage-switching (ZVS) of the switches are realized with function of transformer leakage inductances and the parasitic capacitances of the switches. There is no voltage oscillation and voltage spike on the secondary rectifier diodes because of output filter capacitor's clamping. Operation principle, output characteristics and ZVS condition of the proposed converter are analyzed. Experimental results obtained from a 270 V input 2 kW 100 kHz prototype are presented. The measured efficiency is 95.93% at full load.
Citations
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01 Nov 2010
TL;DR: In this article, a zero-voltage switching (ZVS) interleaved two-switch forward (ITSF) converter employing a phase-shift control is proposed, which reduces the output filter size.
Abstract: In this paper, a zero-voltage switching (ZVS) interleaved two-switch forward (ITSF) converter employing a phase-shift control is proposed. Since the proposed converter is based on a two-switch forward (TSF) topology, it has no chance to be a short circuit causing device failure. Furthermore, the interleaving operation of two TSF converters reduces the output filter size. In addition, by applying the phase-shift control on the common clamping diode structure at the primary side, all primary switches can be turned on under ZVS conditions. The operational principle, theoretical analysis, and design consideration are presented. To confirm the performance of the proposed circuit, experimental results from a 480 W, 100 kHz, and 400 V to 48 V prototype are presented.
9 citations
Cites background from "A high-efficiency DC-DC converter f..."
...The TSF converter presented in [8] can operate under zero-voltage-switching (ZVS) conditions....
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01 Oct 2016
TL;DR: In this paper, a new control method for three-phase-bridge inverter with improved neutral forming transformer (INFT) is presented, where the controlling PWM signal is obtained by combining the switching point preset PWM and unipolar SPWM, and the fundamental and harmonic content of the controlling signal are analyzed.
Abstract: A new control method for three-phase-bridge inverter with improved neutral forming transformer (INFT) is presented in this paper. The controlling PWM signal is obtained by combining the switching point preset PWM and unipolar SPWM, and the fundamental and harmonic content of the controlling signal are analyzed. By analysis of the relationship of phasor voltage of neutral forming transformer, an improved neutral forming transformer with a boost function is proposed. Based on the strategies previously mentioned, the topologies and design methods of three-phase aviation inverter with high DC voltage input is given. The simulation and experimental results have confirmed the validity of the design methods.
5 citations
Cites background from "A high-efficiency DC-DC converter f..."
...Due to the adoption of the two level transformation, the efficiency of the whole machine is low, usually in 90%, and the system structure is very complicated, and the reliability is low [1]~[4]....
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15 Jun 2015
TL;DR: In this article, a new push-pull converter with features of soft switching and anti-shoot-through capability is proposed for aerospace applications by embedding LLC resonant tank at the secondary side, which achieves zerovoltage switching for MOSFETs and zero-current switching for Diodes.
Abstract: A new push-pull converter with features of soft switching and anti-shoot-through capability is proposed for aerospace applications. By embedding LLC resonant tank at the secondary side, the zero-voltage switching for MOSFETs and zero-current switching for Diodes can be achieved. Based on the fundamental harmonic approximation analysis, the operation principle of the proposed converter is analyzed, which is similar to the traditional LLC converters. A 500W prototype was built to verify the merits of the proposed converter. Experimental results show that all the power devices can be operated under soft-switching conditions, while achieving high conversion efficiency and high reliability.
1 citations
Cites methods from "A high-efficiency DC-DC converter f..."
...In line with this thinking, in this paper, a LLC resonant tank is embedded to the secondary side of the traditional dual-switch push-pull converter (DSPPC) in [12,13] to realize soft switching for the MOSFETs and Diodes, as shown in Fig....
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01 Jun 2019
TL;DR: In this paper, the authors proposed an interleaved two-switch forward (ITF) converter which employs a phase shift control to improve the reliability and power density of the converter.
Abstract: This paper presents the design of an interleaved two-switch forward (ITF)converter which employs a phase-shift control. It features high reliability and high power density. All the primary switches can be turned on in a zero-voltage switching (ZVS) method with the function of transformer resonance inductances and capacitance of MOSFETs. Only one transformer is used in the converter to improve the utilization rate of transformer core and power density of this converter. There is less duty cycle loss in second wingding than conventional ITF circuit because the primary currents always remain positive. Finally the operation and performance of the proposed converter is implemented in a 100kHZ, 400V/48V, 1kW prototype in this paper.
References
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TL;DR: The fundamental issues faced in the aircraft electrical power systems are addressed in this paper, where a brief description of the conventional and advanced aircraft power system architectures, their disadvantages, opportunities for improvement, future electric loads, role of power electronics, and present trends in aircraft power systems research is given, followed by a brief outline of projected future advancements.
Abstract: The fundamental issues faced in the aircraft electrical power systems are addressed. A brief description of the conventional and advanced aircraft power system architectures, their disadvantages, opportunities for improvement, future electric loads, role of power electronics, and present trends in aircraft power system research is given, followed by a brief outline of projected future advancements.
390 citations
27 Jul 1999
TL;DR: An improved two-transistor forward converter is proposed, developed by paralleling an active damp circuit at the primary side of the transformer of the two- transistors forward converter to damp the voltage across power switches, to demagnetize the transformer and to achieve zero-voltage-turn-on of the power switches.
Abstract: An improved two-transistor forward converter, an active damp two-transistor forward converter, has been proposed in this paper. It is developed by paralleling an active damp circuit at the primary side of the transformer of the two-transistor forward converter to damp the voltage across power switches, to demagnetize the transformer and to achieve zero-voltage-turn-on of the power switches. Complete analysis and simulation of the converter are performed, from which some important results are obtained and given.
40 citations
"A high-efficiency DC-DC converter f..." refers background in this paper
...However this topology has the drawback of hard switching and single quadrant operation of the high frequency transformer [3]-[7]....
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30 May 1999
TL;DR: Stability analysis of a baseline power system architecture for modern aircraft, using bifurcation analysis to identify the type, multiplicity and stability of system trajectories, is addressed.
Abstract: Stability analysis of a baseline power system architecture for modern aircraft is addressed. Power electronic converters are widely used in modern aircraft power distribution systems. Due to their inherent nonlinear characteristics, instabilities may arise while integrating individual subsystems together. Bifurcation analysis is used to identify the type, multiplicity and stability of system trajectories. The complete bifurcation diagram for the baseline power system is drawn. The dependence of the parameter values on the bifurcation behavior of the baseline system is presented.
19 citations
06 Feb 2000
TL;DR: In this article, a novel ZVT interleaving two-transistor forward converter (ZVT-TTFC) is presented, in which the main switches can be turned on and off in zero voltage conditions, and auxiliary switch can be turn on in zero current conditions.
Abstract: Two-transistor forward converter (TTFC) has more advantageous than single-transistor forward converter and more reliable than full-bridge or half-bridge converter. An interleaving two-transistor converter can increase power converter capacity. A novel ZVT interleaving two-transistor forward converter is presented in this paper. In this interleaving TTFC, the main switches can be turned on and off in zero voltage conditions, and auxiliary switches can be turn on and off in zero current conditions. The operating principle of the proposed ZVT interleaving TTFC is investigated. Methods to determine the resonance capacitor and to determine the turn-on lead time of the auxiliary switch are discussed. Finally, simulation and experimental results are presented which verify the validity of the proposed ZVT interleaving TTFC.
15 citations
"A high-efficiency DC-DC converter f..." refers methods in this paper
...In [8], a novel ZVT interleaving TTFC is presented by adding two auxiliary switches, two diodes and a resonance capacitor....
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17 Jun 2001
TL;DR: In this paper, the authors present a family of single-ended power converters that, adequately designed and commanded, can perform ZVS turnoff and turnon with a value near to zero, namely quasi-ZVS (QZVS) at main switches.
Abstract: This paper presents a family of single-ended power converters that, adequately designed and commanded, can perform ZVS turn-off and turn-on with a value near to zero namely quasi-ZVS (QZVS) at main switches. The auxiliary circuit presents low reactive energy and is composed of one inductor, one diode and one switch, which operate with ZCS. To demonstrate the feasibility of the proposed technique, it is applied to a two switch forward converter. It is not necessary the use of a third winding in the transformer nor auxiliary voltage sources to achieve soft switching. The implementation is possible due to the use of an appropriate command, different than is used conventionally in two switch forward converters. Complete analysis of the operation stages, as well as the design procedures for the correct operation of the converter are presented. Experimental results obtained from a prototype of 250W/48V@100kHz demonstrate the feasibility of this active auxiliary commutation circuit (AACC) applied to two switch forward converters. Furthermore, a new concept of switching is introduced, where the main switches commutate with QZVS.
14 citations