A Three-Level DC–DC Converter With Wide-Input Voltage Operations for Ship-Electric-Power-Distribution Systems

Song, Byeong-Mun; McDowell, R.; Bushnell, A.; Ennis, J.B.

doi:10.1109/tps.2004.835485

Cited by 81 publications

(30 citation statements)

References 9 publications

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“…However, power switches should suffer the input voltage due to the full-bridge structure. High input DC/DC converters have been developed for ship electric power distribution systems [5], three-phase AC/DC converters and the traction systems for light trains [6]- [7]. Three-level DC/DC converters [8]- [10] with low voltage and current stresses were presented to reduce the voltage stress on active switches.…”

Section: Introductionmentioning

confidence: 99%

Medium Voltage Resonant Converter with Balanced Input Capacitor Voltages and Output Diode Currents

Lin¹,

Du²

2015

Journal of Power Electronics

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This paper presents a 1.92 kW resonant converter for medium voltage applications that uses low voltage stress MOSFETs (500V) to achieve zero voltage switching (ZVS) turn-on. In the proposed converter, four MOSFETs are connected in series to limit the voltage stress of the power switches at half of the input voltage. In addition, three resonant circuits are adopted to share the load current and to reduce the current stress of the passive components. Furthermore, the transformer primary and secondary windings are connected in series to balance the output diode currents for medium power applications. Split capacitors are adopted in each resonant circuit to reduce the current stress of the resonant capacitors. Two balance capacitors are also used to automatically balance the input capacitor voltage in every switching cycle. Based on the circuit characteristics of the resonant converter, the MOSFETs are turned on under ZVS. If the switching frequency is less than the series resonant frequency, the rectifier diodes can be turned off under zero current switching (ZCS). Experimental results from a prototype with a 750-800 V input and a 48V/40A output are provided to verify the theoretical analysis and the effectiveness of the proposed converter.

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Section: Introductionmentioning

confidence: 99%

Medium Voltage Resonant Converter with Balanced Input Capacitor Voltages and Output Diode Currents

Lin¹,

Du²

2015

Journal of Power Electronics

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“…Three-level converters or inverters have been proposed for high voltage applications such as high speed railway electrical systems [1], three-phase high power factor correction converters, ship electric power distribution systems [2], reactive power compensators [3]- [5] and AC motor systems [6]- [8]. Three-level converters/inverters [3]- [8] with a neutral-point diode clamp, a capacitor clamp or series H-bridge topologies have been proposed and developed to decrease the voltage stress of power devices and to increase the switching frequency.…”

Section: Introductionmentioning

confidence: 99%

A ZVS Resonant Converter with Balanced Flying Capacitors

Lin¹,

Chen²

2015

Journal of Power Electronics

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This paper presents a new resonant converter to achieve the soft switching of power devices. Two full-bridge converters are connected in series to clamp the voltage stress of power switches at V in /2. Thus, power MOSFETs with a 500V voltage rating can be used for 800V input voltage applications. Two flying capacitors are connected on the AC side of the two full-bridge converters to automatically balance the two split input capacitor voltages in every switching cycle. Two resonant tanks are used in the proposed converter to share the load current and to reduce the current stress of the passive and active components. If the switching frequency is less than the series resonant frequency of the resonant tanks, the power MOSFETs can be turned on under zero voltage switching, and the rectifier diodes can be turned off under zero current switching. The switching losses on the power MOSFETs are reduced and the reverse recovery loss is improved. Experiments with a 1.5kW prototype are provided to demonstrate the performance of the proposed converter.

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“…Power converters for medium or high power applications have been proposed and applied for many industry applications, such as fuel-cell power system [1], charge system [2] and ship power system [3]. For three-phase AC/DC power conversion systems, the front stage is a power factor corrector (PFC) and the second stage a DC/DC converter.…”

Section: Introductionmentioning

confidence: 99%

Analysis of an Interleaved Resonant Converter for High Voltage and High Current Applications

Lin¹,

Chen²

2014

Journal of Electrical Engineering and Technology

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-This paper presents an interleaved resonant converter to reduce the voltage stress of power MOSFETs and achieve high circuit efficiency. Two half-bridge converters are connected in series at high voltage side to limit MOSFETs at V in /2 voltage stress. Flying capacitor is used between two series half-bridge converters to balance two input capacitor voltages in each switching cycle. Variable switching frequency scheme is used to control the output voltage. The resonant circuit is operated at the inductive load. Thus, the input current of the resonant circuit is lagging to the fundamental input voltage. Power MOSFETs can be turn on under zero voltage switching. Two resonant circuits are connected in parallel to reduce the current stress of transformer windings and rectifier diodes at low voltage side. Interleaved pulse-width modulation is adopted to decrease the output ripple current. Finally, experiments are presented to demonstrate the performance of the proposed converter.

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A Three-Level DC–DC Converter With Wide-Input Voltage Operations for Ship-Electric-Power-Distribution Systems

Cited by 81 publications

References 9 publications

Medium Voltage Resonant Converter with Balanced Input Capacitor Voltages and Output Diode Currents

Medium Voltage Resonant Converter with Balanced Input Capacitor Voltages and Output Diode Currents

A ZVS Resonant Converter with Balanced Flying Capacitors

Analysis of an Interleaved Resonant Converter for High Voltage and High Current Applications

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