List of Articles Voltage gain

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  1 - A Novel Transformerless DC–DC Converters With High Step-Up Voltage Gain And Low Voltage Stress On The Switch
  hossein ajdarfaeghi Mohammadreza Banaei
  In this paper, a single switch transformerless high step up dc-dc converter with low voltage stress on the switch is proposed. In the proposed converter only one switch is used which makes the control scheme simple as well as reducing the switching power loss. The volta More

  In this paper, a single switch transformerless high step up dc-dc converter with low voltage stress on the switch is proposed. In the proposed converter only one switch is used which makes the control scheme simple as well as reducing the switching power loss. The voltage gain of the proposed converter is higher than the conventional boost converter and buck boost converter and Proposed converter works in wide rang than conventional converters. The proposed converter has low voltage stress on the switch which makes reducing the switching power loss. The proposed converter can be operated in the continuous conduction mode (CCM) and the discontinuous conduction mode (DCM). In this paper, different operation modes of the proposed converter, calculation of the voltage gain, the currents that flow through the components, efficiency and capacitors voltage ripple are presented. To verify the operation of the proposed converter, simulation results via PSCAD software and experimental results are provided. Manuscript profile
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  2 - Overview of DC-DC Non-Insulated Boost Converters (Structure and Improvement of Main Parameters)
  Omid Sharifiyana Majid Dehghani Ghazanfar Shahgholian Sayyed Mohamad Mehdi Mirtalaee Masoud Jabbari
  Abstract: The production of clean electricity is one of the most basic human needs today. Therefore, the use of power plants that use renewable and environmentally friendly fuels (new energy) as their base fuel, has been highly appreciated. However, the output voltage l More

  Abstract: The production of clean electricity is one of the most basic human needs today. Therefore, the use of power plants that use renewable and environmentally friendly fuels (new energy) as their base fuel, has been highly appreciated. However, the output voltage level of local power plants based on new energies is as low as the input voltage of the next floors (inverters, etc.). Therefore, researchers have tried to solve this defect by using DC / DC boost converters. The structures related to these converters are different based on the designer's expectations such as voltage gain, output power, efficiency, input voltage specifications, etc. Boost converters are responsible for increasing the DC voltage by switching and storing energy in their inductor. But the same simple structure can be created with the help of new tricks such as using magnetic coupling, adding passive incremental circuits to the converter structure, creating more complete structures by using several active switches and even combining several structures together to the desired point in terms of voltage gain. On the other hand, with soft switching methods (resonance, snubber, etc.), the efficiency of boost converters is in the acceptable range. In this paper, the types of power plants based on new energy and then boost converters, which are the most basic elements of a power plant based on new energy, it is categorized in terms of incremental structures and applied methods for optimizing these converters, especially in terms of reducing losses and increasing efficiency. Manuscript profile
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  3 - A New Topology for Switched Capacitor Multilevel Inverter Based on H-Bridge Submodules
  Majid Hosseinpour Erfan Panahlou Ali Seifi Abdolmajid Dejamkhooy
  Reducing the number of voltage sources and the power electronics components while obtaining voltage boosting in the output voltage are the key parameters in the research area of the multilevel inverter design. A lesser number of components would ensure lesser cost while More

  Reducing the number of voltage sources and the power electronics components while obtaining voltage boosting in the output voltage are the key parameters in the research area of the multilevel inverter design. A lesser number of components would ensure lesser cost while higher boosting ability increases its application potential. In this paper, a new H-bridge based single-source switched capa­citor multilevel inverter structure is introduced. The proposed structure including two K-type units (KTU) can produce nineteen voltage levels with a voltage boosting of 1.5 times the input voltage. This converter consists of fourteen switches, two diodes, one voltage source and five capacitors with self-balancing capability. A comprehensive comparative comparison with the recent presented topologies have been carried out to investigate the performance of proposed structure. The main features of the proposed structure are utilizing single DC voltage source, self-balancing of the capacitors the capability of the input voltage, reducing the power electronics components in terms of voltage level count, and thus reducing the overall cost. The simulation results in the Matlab/simulink environment and the experimental laboratory results are provided to verify the satisfactory operation of the propo­sed topology. Manuscript profile
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  4 - Design and Analysis of a New Structure for Non-Isolated DC-DC Boost Converters
  Massoud Emamdad Ehsan Akbari Shima Karbasi Abbas Zare Ghaleh Seyyedi
  Following the scarcity of non-renewable resources such as oil, gas and coal, more research is focused on the issue of high energy consumption and society's dependence on fossil fuels. The use of renewable energy and the development of microgrids can be necessary to redu More

  Following the scarcity of non-renewable resources such as oil, gas and coal, more research is focused on the issue of high energy consumption and society's dependence on fossil fuels. The use of renewable energy and the development of microgrids can be necessary to reduce dependence on fossil fuels. Photovoltaic systems play a key role in microgrids as a source of renewable energy supply. In these systems, the output voltage of the cell is usually much lower than the voltage required by the DC bus, and as the output current increases, the amount of this voltage decreases significantly. Therefore, the presence of a step-up DC-DC converter with a wide input voltage range is necessary to connect the low-voltage cell source and the high-voltage DC bus connected to the inverter. In this paper, a new structure is presented for non-insulated DC-DC boost converters based on voltage lift technique. The proposed converter has a proper voltage gain at output and an acceptable voltage stress on switch and diodes in comparison with recent references. The proposed converter has a switch with easier control and high reliability due to the input source common point and the output load of the converter. Analysis of the voltage stress as well as selection of suitable elements along with converter analysis in continuous mode are performed and calculation validity is confirmed by presented laboratory results. Manuscript profile
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  5 - Design and Implementation of Soft Switching Three-port High Step-Up DC-DC Converter for Solar Energy Applications
  Somaye Gashtasebi Fariborz Haghighatdar Fesharaki Seyed Mohammad Mehdi Mirtalaei
  In recent few decades, due to various reasons, including energy crisis and environmental problems, renewable energy sources such as wind energy, solar systems and fuel cells have received much attention. Solar or photovoltaic systems are one of the most widely used rene More

  In recent few decades, due to various reasons, including energy crisis and environmental problems, renewable energy sources such as wind energy, solar systems and fuel cells have received much attention. Solar or photovoltaic systems are one of the most widely used renewable energy sources that have a low output voltage. For this reason, research on dc-dc converters has increased in recent years. In this paper, a non-isolated high voltage gain converter with three input-output ports is proposed. This converter provides two separate paths for power flow from each input source to the output load. In order to reduce the number of converter components, some components play multiple roles. Therefore, the energy storage device (battery) will charge with the same components used to transfer the power to the load. In this converter, to increase the voltage gain, the coupled inductor technique is used. Moreover, to reduce the leakage inductance as well as achieving the soft switching condition, two active clamps are used. Since the voltage across the switches is limited, the switches can be used with low voltage stress and thus low conduction losses. In this converter, the ripple of the input current will reduce by adding an inductor at its input. This has a significant impact on the performance and the lifespan of the solar cells. The various operational modes of the converter are discussed and the designing considerations are presented. A prototype of the proposed converter is simulated to supply a 130 W, 330 V load with a switching frequency of 50 kHz, in OrCAD software. Finally, a laboratory sample is implemented and the theoretical analysis are validated by the practical results.  Manuscript profile
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  6 - Design and Implementation of a High Step-Up Boost-Sepic Hybrid Converter with Soft Switching
  Sayyed Mohammad Mehdi Mirtalaei Mahnaz Mohtaj Hamid Reza Karami
  In this paper a compound boost- sepic converter with soft switching for high voltage application is proposed. One of the advantages of this converter is that, the main switch is turned on under the ZCS condition without need to any auxiliary switch so we have lower swit More

  In this paper a compound boost- sepic converter with soft switching for high voltage application is proposed. One of the advantages of this converter is that, the main switch is turned on under the ZCS condition without need to any auxiliary switch so we have lower switching loss. In order to increase the voltage gain in this topology, a boost converter used in series with the output stage of sepic converter, therefore the output voltage of boost converter added to the output voltage of sepic converter and the voltage gain has been increased. Also a coupled inductor has been used in the boost converter topology which leads to a further increase in the voltage gain of the converter. In order to evaluate the operation of the proposed converter, simulation results and analysis of converter operational modes are presented. In addition, experimental results are presented for a typical boost-sepic converter. These results verify the proper operation of proposed converter.  Manuscript profile