Here, a new family of non-isolated step-up/down and step-up switched-capacitor (SC)-based DC-DC converters are proposed possessing many advantages as lower voltage stress on capacitors and higher voltage gain compared to previously introduced DC-DC converters. The proposed converter structures have multiple capacitors which are based on principles of DC-DC SC converters. Therefore, the amount of power transfer from the input to the output is higher in the proposed converters. Generally, the proposed converters are more suitable for industrial applications, especially for generating highvoltage gains in lower duty-cycles. For proving the analysis, comprehensive comparisons and precise experiments have been performed which show remarkable performance of the proposed converter topologies.

Summary This article proposes a new Zeta‐based switched‐capacitor (SC) dc‐dc converter, which has many advantages such as increased voltage gain, decreased duty‐cycle, lower voltage stress on components such as its capacitors and input switch, and increased output power over traditional dc‐dc converter structures. In traditional converters such as Zeta converter, there is only one coupling capacitor, which works as a medium for transferring the power between input and the output. However, in the proposed Zeta‐based converter, there are multiple coupling capacitors, which are used based on dc‐dc SC converter principles. By using these switched coupling capacitors, the mentioned advantages are obtained for the proposed structure, which in turn make this converter more applicable for industrial applications. The analysis has been validated by comprehensive and precise comparisons and experimental results.

Summary This paper presents a new family of extendible hybrid and nonhybrid step‐up/‐down switched capacitor DC‐DC converter structures benefiting from numerous advantages like lower voltage stress on switched capacitors, fewer power components like switches, and higher voltage gain compared with other converters. In the proposed family, it is aimed to use diodes rather than switches, since they are simpler, cheaper, and smaller than switches, which in turn makes the proposed converters cost‐, weight‐, and size‐effective structures. Also, because of the existence of multiple switched capacitors, more power can be transferred from the input source to the load (output) in the proposed topologies. In general, the proposed hybrid and nonhybrid structures are more suitable for a vast variety of industrial applications like regulating output voltage of renewable energy sources, specifically in high power ratings and high voltage gains. For validating the proposed ideas, thorough comparisons and experiments are presented.

In many modern applications such as renewable energy sources (RESs), DC-DC step-up converters can be used to regulate the input variable and/or low voltage to achieve the desired characteristics such as amplitude and ripples at the output voltage. This article proposes a new transformer-less step-up DC-DC converter which, compared to previously presented converter topologies in the same class, can provide a higher variable voltage conversion ratio besides benefits such as decreased voltage stress on the switched-capacitors and power switches. Since the proposed topology is expandable, it can generate much higher voltage conversion ratios with lower, non-extreme duty-cycles which can be provided by a simple and cheap control circuit. The aforementioned advantages make the converter a suitable candidate for numerous industrial applications such as RES applications. Besides the voltage regulation applications, the proposed converter can be employed to extract the maximum power from RESs such as photovoltaic panels. To prove the converter performance, comprehensive comparisons and experiments are performed.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Summary This paper presents a new step‐up switched‐capacitor (SC) DC‐DC converter which has many advantages such as reduction in investment cost, control complexity, number of components, voltage stress on components, and size over traditional topologies. In the proposed structure, power switches are reduced in number which in turn leads to the merits mentioned earlier and makes the converter more suitable for industrial applications. Furthermore, a previously introduced zero‐current switching (ZCS) method is used here which provides soft switching for the devices. There is also a reduction in the number of required inductors to achieve ZCS due to the decreased number of switches in the proposed converter. The proposed converter is validated by comprehensive simulation results in MATLAB Simulink environment and also precise experimental results which show the acceptable performance of the proposed topology.