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Renjini, G.
- Sepic Boost Converter with High Voltage Gain
Authors
1 Department of Electrical and Electronics, Jyothi Engineering College, Cheruthuruthy, Thrissur, IN
Source
Automation and Autonomous Systems, Vol 8, No 9 (2016), Pagination: 252-256Abstract
The paper presents a high gain dc-dc converter which is derived from a traditional SEPIC (Single-Ended Primary-Inductor) converter. The distributed generation based system with renewable energy resources have rapidly developed in recent years. These distributed generation systems are powered by sources such as fuel cell, Photovoltaic (PV) systems and batteries. This consists of two conversion stages, in the first stage the low level voltage from the PV cell is converted to high level voltage by using a dc-dc converter. In the second stage the high level dc voltage is converted into AC voltage by using inverter. The electrical energy demand requirements can be achieved by increasing the gain of the converter. The proposed converter high gain achieved by replacing the coupled inductor instead of inductor in the basic sepic converter. Further increase of gain is achieved by using charge pump capacitor cell. The main advantage of the sepic converter is continuous input current, which can be helpful in accurate PowerPoint tracking of solar cell The inductorless regenerative snubber that reduces switching losses and helps to attain soft switching (zero voltage and zero current switching) conditions.
Keywords
Sepic Conveter, Pv Cell, Coupled Inductor, Charge Pump Capacitor Cell, Snubber.
- Closed Loop Control of Soft Switched Single Switch Isolated Step Up DC-DC Converter
Authors
1 Department of Electrical and Electronics, Jyothi Engineering College, Cheruthuruthy, Thrissur, Kerala, IN
Source
Automation and Autonomous Systems, Vol 8, No 9 (2016), Pagination: 257-261Abstract
The high switching frequencies in power converters increases the switching losses, and electromagnetic interferences. These losses can be overcome by employing soft switching techniques. The paper introduces a soft switched single switch isolated DC-DC Converter where Switching losses, current and voltage stress can be reduced. The presented converter can be Zero current Switching (ZCS) turn on and Zero-Voltage Switching (ZVS) turn off of diodes and switches, regardless of load variation. The simulation of the circuit with 12V input, 100V/0.1A output is validated using MATLAB.