scholarly journals Modified Cascaded Z-Source High Step-Up Boost Converter

2020 ◽  
Author(s):  
Navid Salehi ◽  
Herminio Martinez-Garcia ◽  
Guillermo Velasco-Quesada
Keyword(s):  
High Voltage ◽  
Boost Converter ◽  
Experimental Results ◽  
Input Current ◽  
Voltage Gain ◽  
Low Input ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Photovoltaic Applications ◽  
Current Ripple

To improve the voltage gain of step-up converters, cascaded technique is considered as a possible solution in this paper. By considering the concept of cascading two Z-source networks in a conventional boost converter, the converter takes the advantages of both impedance source and cascaded converters. However, by applying some modifications, the proposed converter provides high voltage gain while the voltage stress of switch and diodes are still low. Moreover, the low input current ripple of the converter makes it absolutely appropriate for photovoltaic applications in order to expand the lifetime of PV panels. After analyzing the operation principles of the proposed converter, simulation and experimental results of a 100W prototype are presented to verify the proposed converter performance.

scholarly journals Modified Cascaded Z-Source High Step-Up Boost Converter

Electronics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1932
Author(s):  
Navid Salehi ◽  
Herminio Martínez-García ◽  
Guillermo Velasco-Quesada
Keyword(s):  
High Voltage ◽  
Boost Converter ◽  
Experimental Results ◽  
Input Current ◽  
Voltage Gain ◽  
Low Input ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Photovoltaic Applications ◽  
Current Ripple

To improve the voltage gain of step-up converters, the cascaded technique is considered as a possible solution in this paper. By considering the concept of cascading two Z-source networks in a conventional boost converter, the proposed topology takes the advantages of both impedance source and cascaded converters. By applying some modifications, the proposed converter provides high voltage gain while the voltage stress of the switch and diodes is still low. Moreover, the low input current ripple of the converter makes it absolutely appropriate for photovoltaic applications in expanding the lifetime of PV panels. After analyzing the operation principles of the proposed converter, we present the simulation and experimental results of a 100 W prototype to verify the proposed converter performance.

Soft-Switching Boost Half-Bridge Converter with High Voltage Gain and Low Input Current Ripple

2012 ◽  
Vol 424-425 ◽  
pp. 1093-1096
Author(s):  
Hyun Lark Do
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Soft Switching ◽  
Input Current ◽  
Voltage Gain ◽  
Switching Loss ◽  
Switching Operation ◽  
Low Input ◽  
High Voltage Gain ◽  
Current Ripple

A soft-switching boost half-bridge converter with high voltage gain and low input current ripple is proposed in this paper. In the proposed converter, a coupled inductor is used at the boost converter stage to reduce the input current ripple. The half-bridge converter stage provides soft-switching operation and high voltage gain. Also, the reverse-recovery problem of output diodes is significantly alleviated by utilizing the leakage inductance of the transformer. Due to the soft-switching operation of all switching devices, the switching loss is significantly reduced and the high efficiency is obtained. The feasibility and performance of the proposed converter were verified on an experimental prototype

High Voltage Gain Quasi-Switched Boost Inverters With Low Input Current Ripple

2019 ◽  
Vol 15 (9) ◽  
pp. 4857-4866 ◽  
Author(s):  
Minh-Khai Nguyen ◽  
Truong-Duy Duong ◽  
Young-Cheol Lim ◽  
Joon-Ho Choi
Keyword(s):  
High Voltage ◽  
Input Current ◽  
Voltage Gain ◽  
Low Input ◽  
High Voltage Gain ◽  
Current Ripple

scholarly journals Voltage Multiplier Cell-Based Quasi-Switched Boost Inverter with Low Input Current Ripple

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 227 ◽  
Author(s):  
Minh-Khai Nguyen ◽  
Youn-Ok Choi
Keyword(s):  
High Voltage ◽  
Pulse Width Modulation ◽  
Input Current ◽  
Voltage Gain ◽  
Design Guideline ◽  
Voltage Multiplier ◽  
High Voltage Gain ◽  
High Modulation ◽  
Voltage Stress ◽  
Current Ripple

A novel single-phase single-stage voltage multiplier cell-based quasi-switched boost inverter (VMC-qSBI) is proposed in this paper. By adding the voltage multiplier cell to the qSBI, the proposed VMC-qSBI has the following merits; a decreased voltage stress on an additional switch, a high voltage gain, a continuous input current, shoot through immunity, and a high modulation index. A new pulse-width modulation (PWM) control strategy is presented for the proposed inverter to reduce the input current ripple. To improve the voltage gain of the proposed inverter, an extension is addressed by adding the VMCs. The operating principle, steady-state analysis, and impedance parameter design guideline of the proposed inverter are presented. A comparison between the proposed inverter and other impedance source-based high-voltage gain inverters is shown. Simulation and experimental results are provided to confirm the theoretical analysis.

A Voltage Multiplier Based High Voltage Gain Transformerless Buck–Boost DC–DC Converter

2018 ◽  
Vol 27 (12) ◽  
pp. 1850188 ◽  
Author(s):  
Hossein Ajdar Faeghi Bonab ◽  
Mohamad Reza Banaei ◽  
Navid Taghizadegan Kalantari
Keyword(s):  
High Voltage ◽  
Boost Converter ◽  
Voltage Gain ◽  
Power Switch ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Converter Topology ◽  
Mathematical Analyses ◽  
State Resistance ◽  
Switch Voltage

In this paper, a new transformerless buck–boost converter is introduced. The proposed converter voltage gain is higher that of the conventional buck–boost converter. In the presented converter, only one power switch is used. The switch voltage stress is low, therefore, the low on-state resistance of the power switch can be selected to decrease losses of the switch. The presented converter topology is simple, hence the control of the converter will be simple. The mathematical analyses and principle of the proposed converter are explained. The validity of the proposed converter is confirmed by the experimental results.

scholarly journals High Gain DC-DC Converter Integrating Dickson Charge Pump with Coupled Inductor Technique

2021 ◽  
Vol 7 (6) ◽  
pp. 272-277
Author(s):  
P. Nithin and Dr. R. Rajeswari
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
High Gain ◽  
Voltage Gain ◽  
Power Switch ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Input Side ◽  
State Resistance ◽  
Current Ripple

In this paper, a novel high voltage gain DC-DC converter based on coupled inductor and voltage multiplier technique is proposed. The benefits of the proposed converter are ultra-high voltage gain, low voltage stress across the power switch and very low input current ripple by employing a low current ripple structure (LCR) at the input side. A low on state resistance (RDS(on)) of the power switch can be employed since the voltage stress is a maximum of 25% of the output voltage and the conduction losses of the switch is also reduced. Design of a 1.9kW, 48V at the low voltage side and 430V at the high voltage side is done and verified by simulation. Simulation results show an efficiency of over 93% when operating in continuous conduction mode (CCM).

scholarly journals A Transformer less Buck-Boost Converter with Single Switch

2020 ◽  
Vol 9 (12) ◽  
pp. 355-358
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Boost Converter ◽  
Voltage Gain ◽  
Improve Efficiency ◽  
Conduction Loss ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Active Switch

This paper introduces a modern, transformerless buck-boost dc-dc converter. In this topology, one active switch is used. The proposed buck-boost converter voltage gain is higher compared to the conventional buck-boost converter. With a moderate duty cycle, high voltage gain can be reached. The switch's voltage stress is minimal. As a consequence, the power switch's conduction loss is relatively low to improve efficiency. The converter is simple, hence it will be easy to control the proposed converter.

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