Analysis and Design of the Ladder Resonant Switched-Capacitor Converters for Regulated Output Voltage Applications

Li, Shouxiang; Xiangli, Kang; Zheng, Yifei; Smedley, K.M.

doi:10.1109/tie.2017.2694356

Cited by 46 publications

(16 citation statements)

References 23 publications

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“…The output voltage is boosted in higher voltage level when the number of the capacitors connected in series is increased. For the Ladder switched capacitor topology [25,26], it combine with two groups of capacitors . This topology can attain different voltage gains.…”

Section: Switched Capacitormentioning

confidence: 99%

Design, Analysis and Implementation of the Tapped-Inductor Boost Current Converter on Current Based System

Leung

Cheng

2021

Energies

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Power converters play a crucial role in renewable energy systems. Most well-known power conversion topologies are voltage mode, not current mode. Current mode converters are more appropriate for renewable energy systems such as photovoltaic systems since solar panels are typical current sources. The vast usage of battery as energy storage is also a current sink for constant current mode charging. Utilizing current mode converters should be more straightforward and judicious. In this study, a new topology for the tapped-inductor power conversion circuit family is introduced. The proposed topology has been investigated thoroughly based on theories, simulations and experiments. The boost version is examined as an example to downstate the performance. A detailed comparison with the conventional boost current converter is conducted in this paper.

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Section: Switched Capacitormentioning

confidence: 99%

Design, Analysis and Implementation of the Tapped-Inductor Boost Current Converter on Current Based System

Leung

Cheng

2021

Energies

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“…The variable voltage gain of the SC converter, with fractional precision, is presented in [29]. References [30]- [34] present converters and methods for continuous voltage gain regulation which is achieved by the variation of switching frequency. In the particular case of a ladder converter, presented in [30], the switching frequency adjustment helps to obtain a smoothly regulated voltage gain cofactor in the range from 1 to 3.…”

Section: Introductionmentioning

confidence: 99%

DC-DC High Voltage Gain Switched Capacitor Converter With Multilevel Output Voltage and Zero-Voltage Switching

Folmer

Stala

2021

IEEE Access

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This paper presents the concept and results of a novel resonant DC-DC converter which achieves high voltage gain at a low number of utilized switches, low voltage stress on transistors, ZVS and ZCS operation, high efficiency and variable voltage gain. The converter uses resonant switched-capacitors (SC) circuits with five switches which allows it to reach a six-fold voltage gain. By the application of adequate switching patterns, seven levels of voltage adjustment can be achieved. The basic operation mode of the converter is at zero current switching (ZCS) but a part of the existing transitions can be switched-on at a zero drain-source voltage. Zero voltage switching (ZVS) allows for a reduction of Coss losses and a decrease in disturbances of voltages and currents. In the proposed converter, voltage stress on switches are noticeably lower than the output voltage which is beneficial from viewpoint the cost reduction and switching quality improvement. The converter output stage consists of two series connected capacitors which allows for a supply of 3-level NPC inverters. Resonant inductors, used in the proposed topology, store very low amount of energy and their volume is significantly lower than in case of chokes typically used in switch-mode converters. Qualities of the converter such as low switch count, efficiency, ZCS and ZVS operation as well as voltage gain variation are demonstrated in this paper. Furthermore, an impact of MOSFET transistors type on the efficiency of the converter is investigated. The design based on low Coss superjunction (SJ) MOSFETs is compared with the implementation where R ds(on) of switches is minimized. Due to low voltage stress, application of Schottky rectifiers is also demonstrated in the converter. The concept of the topology and switching patterns is verified by the results of analysis, simulations and experiments.INDEX TERMS Boost converters, DC-DC converters, high voltage gain converter, switched-capacitor circuit.

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“…The output voltage regulation is an essential feature of power converters; however, some SC-based topologies operate with a fixed voltage ratio. In [29] and [30], the output voltage change of the SC converter is possible, but only in the step mode. However, continuous voltage control can be achieved using an adequate topology and switching method, which has been demonstrated in [23]- [25], [27]- [28], and [31].…”

Section: Introductionmentioning

confidence: 99%

High-Gain Switched-Capacitor DC-DC Converter With Low Count of Switches and Low Voltage Stress of Switches

et al. 2021

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This paper presents a novel concept of a high-voltage-gain DC-DC converter. The converter is made up of switched capacitors and passive resonant branches. A significant reduction in the count of switches and low voltage stress on the switches is achieved in this proposed converter topology, in comparison to that of a classical SC series-parallel converter. It is essential from the cost, volume, and efficiency of the converter standpoint. The reduction in the count of switches is threefold. The highest voltage stress on the switches depends on the output voltage and is decreased in the proposed converter as well, as the output voltage is divided into two series-connected capacitors. The presented results demonstrate the operation of the converter with the use of resonant branches, its switching strategies, voltage stresses of switches, efficiency, voltage gain, and output voltage regulation as well as the zero-voltage switching (ZVS) operation. The paper also presents novel issues related to analytical loss modeling, extended concepts of topology, converter start-up, and operation during transient states. The demonstrated concept of the converter, the analytical discussion and its design, as well as the experimental setup and results clearly demonstrate the optimization achievements.INDEX TERMS Boost converters, DC-DC converters, High voltage gain converter, Switched-capacitor converter.

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Analysis and Design of the Ladder Resonant Switched-Capacitor Converters for Regulated Output Voltage Applications

Cited by 46 publications

References 23 publications

Design, Analysis and Implementation of the Tapped-Inductor Boost Current Converter on Current Based System

Design, Analysis and Implementation of the Tapped-Inductor Boost Current Converter on Current Based System

DC-DC High Voltage Gain Switched Capacitor Converter With Multilevel Output Voltage and Zero-Voltage Switching

High-Gain Switched-Capacitor DC-DC Converter With Low Count of Switches and Low Voltage Stress of Switches

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