Soft switching active-clamped dual-series resonant converter

Lin, Bor‐Ren; Yongsheng, Huang; Chen, J.J.

doi:10.1049/iet-pel.2009.0279

Cited by 15 publications

(4 citation statements)

References 8 publications

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“…To demonstrate the benefit of the proposed soft‐switching topology, Table 1 compares the power losses in the switches both for the hard‐switching and the soft‐switching circuits [24]. According to the analysis of the circuit operation and the designations, the specification of the selected components can be used to determine the losses of the main devices for hard‐switching and soft‐switching, respectively.…”

Section: Design Considerationsmentioning

confidence: 99%

Single‐phase ac to high‐voltage dc converter with soft‐switching and diode‐capacitor voltage multiplier

Young

Chen³

et al. 2014

IET Power Electronics

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This paper proposes a single-phase, soft-switching, high step-up ac-dc converter based on a diode-capacitor voltage multiplier (DCVM) with a power factor correction (PFC). By applying the PFC technology, the proposed converter promises a near-unity power factor and a low distortion line current, while providing an adjustable, high step-up dc voltage that the conventional DCVM circuits cannot achieve. To reduce the switching losses, an auxiliary circuit for implementing a soft commutation is added to the power stage of the proposed converter. For operating at a fixed switching frequency, both the main and the auxiliary switches in the power stage are turned off with the zero-current transmission (ZCT). The operating principle, the design considerations and the control strategy of the proposed converter all are detailed and investigated in this paper. A 1.2 kV/500 W laboratory prototype, which employs a commercial PFC IC UC3854 as a controller, is built for test, measurement and evaluation. Under the full-load conditions, the measured power factor, the total harmonic distortion of the line current and the system efficiency are 99.6, 4.86 and 94%, respectively. The experimental results demonstrate the validity of the proposed converter.

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Section: Design Considerationsmentioning

confidence: 99%

Single‐phase ac to high‐voltage dc converter with soft‐switching and diode‐capacitor voltage multiplier

Young

Chen³

et al. 2014

IET Power Electronics

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“…Isolated dc–dc converters are increasingly being used in the various fields, viz. power supplies for space applications, telecommunications, computers, battery chargers for electric vehicles, solid‐state/power‐electronic transformers, micro‐grids, high‐voltage DC and medium‐voltage DC grids, and so on, to provide the galvanic isolation and the desired voltage/current conversion ratios [1–8]. The eminent structures of the isolated dc–dc converters comprise of ac–dc and dc–ac converters along with a high‐frequency transformer.…”

Section: Introductionmentioning

confidence: 99%

Three‐winding transformer based asymmetrical dual active bridge converter

Jakka

Shukla

Demetriades³

2016

IET Power Electronics

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A three-winding transformer based asymmetrical dual active bridge (TWT-ADAB) isolated dc-dc converter is proposed in this study. The converter comprises of three stages: primary, isolation, and secondary. The primary stage consists of an H-bridge converter, the isolation stage consists of a three-winding transformer with one primary and two secondary windings, and the secondary stage consists of a bridge converter having three legs and six active switches. The load current is shared equally by the secondary windings of the transformer resulting in reduced currents through switches of the secondary converter. Therefore, the turn-off losses of these switches get reduced. Further, zero voltage switching turn-on can be achieved for all switches of the TWT-ADAB converter to reduce the switching losses. A detailed analysis of the modelling and control of the proposed TWT-ADAB converter is presented. The theoretical analysis is verified using the simulation and experimental results. These demonstrated results show that the proposed TWT-ADAB converter offers wider ranges of the output voltages and powers and higher efficiency as compared with the existing dual bridge isolated dc-dc converters. Therefore, it can be an eminent structure for high-power isolated dc-dc power conversion applications.

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“…However, some disadvantages prevent their popularity. Even the dual resonant circuit applications in [20], [21] produce a double output voltage, and two windings are required for the transformer which results in design complexity and a bottleneck for power density. The authors of [22] provide an ingenious method to achieve a high step-up through a resonant circuit.…”

Section: Introductionmentioning

confidence: 99%

High Step-up Active-Clamp Converter with an Input Current Doubler and a Symmetrical Switched-Capacitor Circuit

He¹,

Zeng²,

Li³

et al. 2015

Journal of Power Electronics

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A high step-up dc-dc converter is proposed for photovoltaic power systems in this paper. The proposed converter consists of an input current doubler, a symmetrical switched-capacitor doubler and an active-clamp circuit. The input current doubler minimizes the input current ripple. The symmetrical switched-capacitor doubler is composed of two symmetrical quasi-resonant switched-capacitor circuits, which share the leakage inductance of the transformer as a resonant inductor. The rectifier diodes (switched-capacitor circuit) are turned off at the zero current switching (ZCS) condition, so that the reverse-recovery problem of the diodes is removed. In addition, the symmetrical structure results in an output voltage ripple reduction because the voltage ripples of the charge/pump capacitors cancel each other out. Meanwhile, the voltage stress of the rectifier diodes is clamped at half of the output voltage. In addition, the active-clamp circuit clamps the voltage surges of the switches and recycles the energy of the transformer leakage inductance. Furthermore, pulse-width modulation plus phase angle shift (PPAS) is employed to control the output voltage. The operation principle of the converter is analyzed and experimental results obtained from a 400W prototype are presented to validate the performance of the proposed converter.

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Soft switching active-clamped dual-series resonant converter

Cited by 15 publications

References 8 publications

Single‐phase ac to high‐voltage dc converter with soft‐switching and diode‐capacitor voltage multiplier

Single‐phase ac to high‐voltage dc converter with soft‐switching and diode‐capacitor voltage multiplier

Three‐winding transformer based asymmetrical dual active bridge converter

High Step-up Active-Clamp Converter with an Input Current Doubler and a Symmetrical Switched-Capacitor Circuit

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