Query: High step-up dc–dc converter based on modified active switched-inductor and switched-capacitor cells

Candidate papers:

abstract: A new high gain step up dc dc converter based on modified active switched inductor (MASL) and switched capacitor (SC) is proposed in this study. The proposed converter is based on the classical boost topology, in which the inductor is changed by the proposed MASL cell. This new cell allows the addition of more than two switched inductors (SLs) to the classical boost topology, which is the most significant limitation of conventional active SL. Additionally, in the proposed converter, the output capacitor is replaced by an SC cell, increasing still more the voltage gain of it, which can be higher than 20 without using transformers or coupled inductors, and with lower voltage stress on the semiconductors and high efficiency. The principle of operation, theoretical static and dynamic analysis, design methodology and comparison with other non isolated topologies present in the literature are approached in this study. The performance of the proposed converter is validated by interesting experimental results obtained from a 200 W prototype with an input voltage of 20 V, an output voltage of 400 600 V, switched frequency at 50 kHz and peak efficiency of 95%
author_names: Jessika Melo de Andrade

Roberto Francisco Coelho

Telles Brunelli Lazzarin
title: High step up dc dc converter based on modified active switched inductor and switched capacitor cells
year: 2020

abstract: In this paper, a high step up dc dc converter is proposed. The main feature of the proposed converter is its flexibility in developing and achieving different high voltage gains. This converter comprises of inductor capacitor cells and with a higher number of cells, voltage gain increases. The proposed converter's operation principle is based on charging in parallel and discharging in series paths. Operation analysis and voltage gain and voltage stresses of semiconductors are calculated and contrasted with other converters to illustrate the prominent attributes of the proposed converter. Simulation results, which have been implemented via PSCAD EMTDC, are presented to validate the performance of this converter.
author_names: Sama Salehi

Neda Zahedi

Reza Kheirollahi

Ebrahim Babaei
title: Ultra High Step up DC DC Converter Based on Switched Inductor Capacitor Cells
venue: 2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)
year: 2019

abstract: In this paper, a novel high step up dc/dc converter is presented for renewable energy applications. The suggested structure consists of a coupled inductor and two voltage multiplier cells, in order to obtain high step up voltage gain. In addition, two capacitors are charged during the switch off period, using the energy stored in the coupled inductor which increases the voltage transfer gain. The energy stored in the leakage inductance is recycled with the use of a passive clamp circuit. The voltage stress on the main power switch is also reduced in the proposed topology. Therefore, a main power switch with low resistance RDS (ON) can be used to reduce the conduction losses. The operation principle and the steady state analyses are discussed thoroughly. To verify the performance of the presented converter, a 300 W laboratory prototype circuit is implemented. The results validate the theoretical analyses and the practicability of the presented high step up converter.
author_names: Ali Ajami

Hossein Ardi

Amir Farakhor
title: A Novel High Step up DC/DC Converter Based on Integrating Coupled Inductor and Switched Capacitor Techniques for Renewable Energy Applications
venue: IEEE Transactions on Power Electronics
year: 2015

abstract: For a variety of renewable energy applications, large number of dc dc converters can be used. Here a high step up dc dc converter using a integrated coupled inductor and switched capacitor is proposed. The converter acheives high voltage gain with the help of an inductor which is coupled type and two voltage multiplier cells. When the switch is off the two capacitors are charged using the energy in the inductor which is coupled type, leading to an increase in the voltage gain. Recycling of the energy in the leakage inductance by the passive clamp circuit leads to decrease in the switching stresses.
author_names: M Vinduja

Aswin T Surendran

M Madhu
title: A high step up DC DC converter based on integrated coupled inductor and switched capacitor
venue: 2018 International Conference on Power, Signals, Control and Computation (EPSCICON)
year: 2018

abstract: This paper proposes a high voltage gain dc/dc converter with coupled inductor cells and switched capacitor for renewable energy applications. It includes coupled inductor, switched capacitor and voltage multiplier cell. Switched capacitor charged during off period by using the energy stored in the coupled inductor. This will increase the performance of the converter. The operation principle and steady state analyses are discussed thoroughly. Simulation is done with 40V input voltage, 300W output power and 400V output voltage using MATLAB.
author_names: Josie Baby

Della David
title: CLOSED LOOP CONTROL OF HIGH STEP UP DC/DC CONVERTER BASED ON COUPLED INDUCTOR AND SWITCHED CAPACITOR
year: 2015

abstract: Nowadays, with the high power demand in industries, the need for high step up converters has been a crucial part of interest. Power conservation is an essential aspect of innovation leading to improving the voltage gain of conventional converters such as boost, Cuk and SEPIC. Boosting techniques including voltage multiplier (VM) cells, voltage lift capacitors, coupled inductors, switched capacitor/inductor, etc. are used to enhance the conventional converters to meet high voltage requirements of various applications. This paper proposes a new high voltage gain DC DC converter using a coupled inductor and VM cell. The operation of the converter is based on charging the capacitor using a single MOSFET switch and adding it in series with the source to the load. Besides, a passive clamp circuit which is comprised of capacitor and diode has been selected over the active clamp to reduce the voltage stress on the MOSFET switch, which helps to improve the voltage gain of the converter. The turns ratio of the coupled inductor is chosen appropriately to get the required voltage gain. Reduction in voltage stress results in selecting MOSFET with small on state resistance R ds on which offers less conduction loss and high efficiency of the converter. The proposed converter is modeled, analyzed and simulated using PLECS simulation software. The results are experimentally verified by developing 150 W experimental prototype.
author_names: Manoharan Premkumar

C Kumar

A Anbarasan

Ravichandran Sowmya
title: A novel non isolated high step up DC DC boost converter using single switch for renewable energy systems
year: 2020

abstract: This study proposes a series of high step up DC/DC converters based on the coupled inductor and switched capacitors. The priority of the switched capacitor connection methods of the converters is presented by their contributions to the voltage gain so that the converters can be selected optimally according to the gain demand. For this converter, the voltage gain can be adjusted by both of the turns ratios of the coupled inductor and the number of switched capacitor units. It makes it possible to further improve the voltage gain when the turns ratio of the coupled inductor is rather high. Moreover, the introduction of switched capacitors can reduce the voltage stress of power components. In this study, the operating principle and performance characteristics of the converters are analysed. Also, a 300 W prototype is set up for verification. The experimental results demonstrate the effect of the theoretical analysis and superiority of the converter.
author_names: Jie Ding

Shi Wei Zhao

Huajie Yin

Ping Qin

Guanbao Zeng
title: High step up DC/DC converters based on coupled inductor and switched capacitors
year: 2020

abstract: This paper presents renewable energy system which consists of low voltage sources like fuel cells and photovoltaic (PV) cells. Thus the high step up dc dc converters are used to produce high step up gain. Theoretically the boost converter can provide the high voltage gain at large duty cycle. But in practice the voltage gain is reduced, due to losses in utilized components like rectifier diode, power switch, inductor and capacitor. Hence the converter using coupled inductor technique was introduced. However, the leakage inductor cause voltage transients on main switch and also reduce the conversion efficiency. To mitigate the voltage stress on the main switch due to voltage spike/transients, the coupled inductor with active clamp circuit based converters are introduced. In this work, a high step up dc dc converter with lossless passive clamp circuit is proposed to reduce stress on the main switch and also to recycle the energy of the leakage inductor. The proposed topology consists of two diodes and two capacitors on the secondary side of the coupled inductor to achieve the high voltage gain. The proposed topology will be analysed in PSIM model in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) of operation and the boundary condition between CCM and DCM will be presented.
author_names: A Suganya

M Sudhakaran
title: Performance analysis of high step up DC DC converter for photovoltaic (PV) system
venue: 2015 International Conference on Circuits, Power and Computing Technologies [ICCPCT 2015]
year: 2015

abstract: High step up voltage gain dc/dc converters are widely used in renewable energy power generation, uninterruptible power system, etc. In order to avoid the influence of leakage inductor in coupled inductors based converters, switched inductor boost converter (SL boost) switched capacitor boost converter (SC boost) and active network converter (ANC) have been developed. With the transition in series and parallel connection of the inductors and capacitors, high step up voltage conversion ratio can be achieved. This paper discusses the characteristics of the switched inductor and switched capacitor cell; makes some comparisons between the ANC and boost converter. Based on the aforementioned analysis, this paper proposed the multicell switched inductor/ switched capacitor combined active network converters (MSL/SC ANC) The proposed converters combine the advantages of SL/SC unit and active network structure. Compared with previous high step up converters, the novel converter provides a higher voltage conversion ratio with a lower voltage/current stress on the power devices, moreover, the structure of proposed SL/SC ANC is very flexible, which means the quantity of SL and SC cells can be adjusted according to required voltage gain. A 20 times gain prototype is designed as an example to show the design procedure. Theoretical analysis and experimental results are presented to demonstrate the feature of the proposed converter.
author_names: Yu Tang

Ting Wang

Dongjin Fu
title: Multicell Switched Inductor/Switched Capacitor Combined Active Network Converters
venue: IEEE Transactions on Power Electronics
year: 2015

abstract: High step up voltage gain DC/DC converters are widely used in renewable energy power generation, uninterruptible power system, etc. In order to avoid the influence of leakage inductor in coupled inductors based converters, switched inductor Boost converter (SL Boost) switched capacitor Boost converter (SC Boost) and active network converter (ANC) have been developed. With the transition in series and parallel connection of the inductors and capacitors, high step up voltage conversion ratio can be achieved. This paper discusses the characteristics of the switched inductor (SL) and switched capacitor (SC) cell and makes some comparisons between the ANC and Boost converter. Based on the above analysis, this paper proposed the multicell switched inductor/switched capacitor combined active network converters (MSL/SC ANC) The proposed converters combine the advantages of SL/SC unit and active network structure. Compared with previous high step up converters, the novel converter provides a higher voltage conversion ratio with a lower voltage/current stress on the power devices. Moreover, the structure of proposed SL/SC ANC is very flexible, which means the quantity of SL and SC cells can be adjusted according to required voltage gain. A 20 times voltage gain prototype is designed as an example to show the design procedure. Theoretical analysis and experimental results are presented to demonstrate the feature of the proposed converter.
author_names: Yaohua He

Yu Tang

Ting Wang

Dongjin Fu
title: Switched inductor/switched capacitor active network converters
venue: 2014 9th IEEE Conference on Industrial Electronics and Applications
year: 2014