High Gain Single Switch DC-DC Converter Based on Switched Capacitor Cells

2020 ◽  
Vol 29 (12) ◽  
pp. 2050188
Author(s):  
G. Indira Kishore ◽  
Ramesh Kumar Tripathi
Keyword(s):  
High Gain ◽  
Switching Frequency ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
Active Components ◽  
Snubber Circuit ◽  
High Switching Frequency ◽  
Voltage Stress ◽  
Active Switch ◽  
Voltage Spike

With photovoltaic or fuel cell as a source, the high voltage required at DC bus as input for inverter can be obtained by high gain DC-DC converters. This can be achieved by implementing switched capacitor (SC) cells. Switched capacitors have the ability to produce high static gain and at the same time, they limit the voltage stress across the components. This paper proposes a high static gain, single switch DC converter based on the SC cells to develop high gain. These cells not only boost the voltage gain but also reduce the voltage stress at the active components. This converter also features a single active switch, low input ripple current through the inductor, absence of snubber circuit as the proposed converter does not assist the voltage spike across the active switch. The proposed converter allows high switching frequency and therefore results in a smaller size. The voltage gain can be increased further by adding the switched cells. In this paper, the operation in CCM, DCM, and design of components for the proposed converter is discussed. The MATLAB/SIMLINK and hardware-based studies for the proposed converters have been discussed to validate the specified features.

scholarly journals Two-Switch High Gain Non-Isolated Cuk Converter

2020 ◽  
Vol 10 (5) ◽  
pp. 6362-6367
Author(s):  
Y. Almalaq ◽  
M. Matin
Keyword(s):  
Duty Cycle ◽  
Output Voltage ◽  
Input Voltage ◽  
High Gain ◽  
Switching Frequency ◽  
Voltage Gain ◽  
Cuk Converter ◽  
Voltage Stress ◽  
Key Aspects ◽  
Conduction Mode

This paper introduces a two-switch high gain non-isolated Cuk converter which can be used as a high gain DC-DC converter in renewable energy, such as photovoltaic and fuel cell, applications because their output is low. As the conventional, the proposed Cuk converter provides negative output voltage but with a higher voltage in magnitude. The main advantage of the proposed converter is having lower voltage stress with the ability to maintain a higher voltage gain. By combining a switched-inductor and a switched-capacitor into the conventional Cuk converter, the proposed Cuk converter has the ability to reach 13 times the input voltage for a duty cycle D of 0.75. Also, by attaching more switched-inductors to the proposed Cuk converter, more voltage gain can be achieved. A complete theoretical analysis of the Continuous Conduction Mode (CCM) of the proposed Cuk converter is presented and the key aspects of the circuit design have been derived. Also, a comparison in terms of voltage gain and voltage stress between the proposed Cuk converter and Cuk converters using other techniques is presented. The proposed Cuk converter has been designed for 100W rated power, -152V output voltage, 50kHz switching frequency, and 75% duty cycle. The presented converter is simulated in Matlab/Simulink and the results are discussed.

scholarly journals Active Switched Capacitor Network in High Gain DC-DC Converter with PI Controller

2020 ◽  
Vol 9 (5) ◽  
pp. 969-973
Keyword(s):  
Comparative Analysis ◽  
Output Voltage ◽  
Input Voltage ◽  
High Gain ◽  
Pi Controller ◽  
Performance Comparison ◽  
Switched Capacitor ◽  
Voltage Gain ◽  
Voltage Stress ◽  
Base Network

In this paper, PI controller in the active switched capacitor network is employed to achieve robust control under disturbance by maintaining sustained output voltage for varying input voltage. Active switched capacitor in the high gain DC–DC circuit efficiently increases voltage gain due to the combination of LC network with minimum duty cycle. The proposed circuit is the modification of typical high gain DC converter and modified network is simple in structure due to reduce in number of switch components and the voltage stress on the capacitor, diodes and across switches are reduced compared to base network. This paper presents the design, operation and analysis of the modified topology and the performance comparison with base converter is presented. Simulation is carried out using MATLAB software for the proposed system with and without PI controller and variation in the output voltage between both the circuits is tabulated and comparative analysis is discussed.

scholarly journals High-Gain Switched-Capacitor DC-DC Converter with Low Count of Switches and Low Voltage Stress of Switches

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Robert Stala ◽  
Maciej Chojowski ◽  
Zbigniew Waradzyn ◽  
Andrzej Mondzik ◽  
Szymon Folmer ◽  
...  
Keyword(s):  
Low Voltage ◽  
High Gain ◽  
Switched Capacitor ◽  
Voltage Stress

scholarly journals High Gain and Reduced Switch Stress DC-DC Converter Topology for PV System

2018 ◽  
Vol 7 (04) ◽  
pp. 23808-23816
Author(s):  
C. Srideepa ◽  
S.Sathish Kumar ◽  
R. Nagarajan
Keyword(s):  
High Gain ◽  
Photovoltaic System ◽  
Voltage Gain ◽  
Pv System ◽  
Power Switch ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Converter Topology ◽  
State Resistance ◽  
Two Hybrid

This paper presents a new high step-up isolated DC-DC converter topology for photovoltaic system. The suggested configuration provides a converter with high voltage gain and reduced switch stress by using three coupled inductor with two hybrid voltage multiplier cell. The operation of the proposed converter is based on a charging capacitor with a single switch in its structure. A passive clamp circuit composed of capacitors and diodes is employed in the converter structure for lowering the voltage stress on the power switch as well as increasing the voltage gain of the converter. Since the voltage stress is low in the provided topology, a switch with a small ON-state resistance can be used. As a result, the losses are decreased and the efficiency is increased. The design of DC-DC boost converter is also discussed in detail. Simulation of DC-DC converter is performed in MATLAB/Simulink and the result are verified

Non-Isolated High Step Up in Voltage DC–DC Converter Topology for Renewable Applications

2020 ◽  
pp. 2150093
Author(s):  
Pavan Prakash Gupta ◽  
G. Indira Kishore ◽  
Ramesh Kumar Tripathi
Keyword(s):  
High Voltage ◽  
Switching Frequency ◽  
Resistive Load ◽  
Voltage Gain ◽  
Boost Converters ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Power Switches ◽  
Converter Topologies ◽  
Converter Topology

In the class of the boost converters, the conventional DC–DC boost converters are in common practice but their limited boost capabilities at higher duty ratios are one of the concerns. The isolated and non-isolated step-up DC–DC converters are one of the remedies of the above issue. The presence of switched inductor and switched capacitors in the circuit of non-isolated configuration can provide considerable step-up in voltage at the output, and also facilitate lower voltage stress on components. In this paper, work has been done to propose three non-isolated high-voltage gain DC–DC boost converter topologies. Along with the high voltage gain, the topologies also have lesser voltage stress across the active power switches and diodes used in topologies. The proposed topologies are suitable for low dc input levels like renewable sources, microgrid and grid-connected applications. A Matlab/Simulink 2017a environment is utilized to derive, design and simulate the proposed topologies for a 100-W load operation. The basic topology is also realized in hardware as a prototype circuit with 100-W resistive load, operated at 50[Formula: see text]kHz switching frequency.

Impact of Parasitic Capacitor to the GaN HEMT Devices

2015 ◽  
Vol 764-765 ◽  
pp. 515-520
Author(s):  
Chia Lin Chen ◽  
Chih Huan Fang ◽  
Yuan Chao Niu ◽  
Yaow Ming Chen
Keyword(s):  
High Power ◽  
Electron Mobility ◽  
High Electron Mobility Transistor ◽  
Switching Frequency ◽  
High Electron ◽  
High Electron Mobility ◽  
Gan Hemt ◽  
High Switching Frequency ◽  
Voltage Spike ◽  
The Impact

The objective of this paper is to evaluate the impact of the parasitic capacitor to the Gallium-Nitride (GaN) based high-electron-mobility transistor (HEMT). Because of the high switching frequency operation, the parasitic inductor has caught a lot of attention when the GaN HEMT is applied in the high power applications. However, the impact of parasitic capacitor to the GaN HEMT is not discussed in literatures. A prototype circuit is built and tested to evaluate the impacts of parasitic capacitor to the GaN HEMT performance. The results show that the parasitic capacitor can induce voltage spike and damage the GaN HEMT.

scholarly journals A Novel Step-Up Power Converter Configuration for Solar Energy Application

2019 ◽  
Vol 25 (3) ◽  
pp. 50-55 ◽  
Author(s):  
Davood Ghaderi ◽  
Gokay Bayrak
Keyword(s):  
Renewable Energy ◽  
Duty Cycle ◽  
Renewable Energy Sources ◽  
High Gain ◽  
Power Converter ◽  
Boost Converter ◽  
Energy Sources ◽  
Switching Frequency ◽  
Voltage Gain ◽  
First Choice

Renewable Energy Sources (RES) including full cells, wind turbines, and photovoltaic panels, widely are spreading. Among all the renewable energy sources, solar power generation system tops the list. The first choice is the boost converter when the voltage step-up is the issue. But the most important subject is applying an efficient structure with high gain, cheap and quick controller circuit. Our proposed cascaded boost converter is one of such converters which consists of several cheap components such as diode, inductor, capacitor and power switch, which has same switching frequency and phase shift in comparison with conventional boost converters. In comparison with the classic cascaded boost converter, the voltage gain for the proposed structure is very high and by forming a preamplifier layer, for a duty cycle of 80 % by adding only two diodes, one inductor, and one capacitor for the second block, voltage gain is increased by 5 times compared to the classic boost converter. The proposed method provides the increased output voltage along with the duty cycle. The projected strategy has been verified with the help of Matlab/Simulink. Also, a hardware implementation of the proposed converter has been done around 200 W by applying a Jiangyin HR-200W-24V type solar panel.

scholarly journals 4-level capacitor-clamped boost converter with hard-switching and soft-switching implementations

2019 ◽  
Vol 10 (1) ◽  
pp. 288
Author(s):  
A.N. Kasiran ◽  
Asmarashid Ponniran ◽  
A.A. Bakar ◽  
M.H. Yatim
Keyword(s):  
Pulse Width Modulation ◽  
Boost Converter ◽  
Soft Switching ◽  
Switching Frequency ◽  
Switching Loss ◽  
Snubber Circuit ◽  
High Switching Frequency ◽  
Parameters Analysis ◽  
Very High ◽  
Current Ripple

This paper presents parameters analysis of 4-level capacitor-clamped boost converter with hard-switching and soft-switching implementation. Principally, by considering the selected circuit structure of the 4-level capacitor-clamped boost converter and appropriate pulse width modulation (PWM) switching strategy, the overall converter volume able to be reduced. Specifically, phase-shifted of 120° of each switching signal is applied in the 4-level capacitor-clamped boost converter in order to increase the inductor current ripple frequency, thus the charging and discharging times of the inductor is reduced. Besides, volume of converters is greatly reduced if very high switching frequency is considered. However, it causes increasing of semiconductor losses and consequently the converter efficiency is affected. The results show that the efficiency of 2-level conventional boost converter and 4-level capacitor-clamped boost converter are 98.59% and 97.67%, respectively in hard-switching technique, and 99.31% and 98.15%, respectively in soft-switching technique. Therefore, by applying soft-switching technique, switching loss of the semiconductor devices is greatly minimized although high switching frequency is applied. In this study, passive lossless snubber circuit is selected for the soft-switching implementation in the 4-level capacitor-clamped boost converter. Based on the simulation results, the switching loss is approximately eliminated by applying soft-switching technique compared to the hard-switching technique implementation.

scholarly journals Design of New High Step-Up DC-DC Converter Topology for Solar PV Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Shanthi Thangavelu ◽  
Prabha Umapathy
Keyword(s):  
Low Voltage ◽  
High Gain ◽  
Performance Comparison ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Solar Pv ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Converter Topologies ◽  
Converter Topology

A new topology for high step-up nonisolated DC-DC converter for solar PV applications is presented in this paper. The proposed high-voltage gain converter topology has many advantages like low-voltage stress on the switches, high gain with low duty ratio, and a continuous input current. The analytical waveforms of the proposed converter are presented in continuous and discontinuous modes of operation. Voltage stress analysis is conducted. The voltage gain and efficiency of the converter in presence of parasitic elements are also derived. Performance comparison of the proposed high-gain converter topology with the recently reported high-gain converter topologies is presented. Validation of theoretical analysis is done through the test results obtained from the simulation of the proposed converter. For the maximum duty ratio of 80%, the output voltage of 670 V is observed, and the voltage gain obtained is 14. Comparison of theoretical and simulation results is presented which validates the performance of the proposed converter.

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