FPGA-based variable modulation-indexed-SPWM generator architecture for constant-output-voltage inverter applications

DC-DC converters are playing an important role in designing of Electric Vehicles, integration of solar cells and other DC applications. Contemporary high power applications use multilevel converters that have multi stage outputs for integrating low voltage sources. Conventional DC-DC converters use single source and have complex structure while using for Hybrid Energy Systems. This paper proposes a multi-input, multi-output DC-DC converter to produce constant output voltage at different input voltage conditions. This topology is best suitable for hybrid power systems where the output voltage is variable due to environmental conditions. It reduces the requirement of magnetic components in the circuit and also reduces the switching losses. The proposed topology has two parts namely multi-input boost converter and level-balancing circuit. Boost converter increases the input voltage and Level Balancing Circuit produce Multi output. Equal values of capacitors are used in Level Balancing Circuit to ensure the constant output voltage at all output stages. The operating modes of each part are given and the design parameters of each part are calculated. Performance of the proposed topology is verified using MATLAB/Simulink simulation which shows the correctness of the analytical approach. Hardware is also presented to evaluate the simulation results.

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Low power constant output voltage RF-DC converter

2012 20th Telecommunications Forum (TELFOR) ◽

10.1109/telfor.2012.6419403 ◽

2012 ◽

Cited By ~ 1

Author(s):

Radivoje Djuric ◽

Mihajlo Bozovic

Keyword(s):

Low Power ◽

Output Voltage ◽

Constant Output

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Mathematical modeling and control of wind energy electric conversion system feeding standalone load

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i1.2.8989 ◽

2017 ◽

Vol 7 (1.2) ◽

pp. 47

Author(s):

N K Rayaguru ◽

N. Poornachandra Rao ◽

K. Navin Sam ◽

Sunil Kumar Thakur

Keyword(s):

Wind Energy ◽

State Space ◽

Output Voltage ◽

State Space Model ◽

Synchronous Generator ◽

Boost Converter ◽

Duty Ratio ◽

Space Model ◽

Conversion System ◽

Constant Output

In this paper, state space model of the complete Wind Energy Electric Conversion System (WEECS) comprising of wind turbine, Permanent Magnet Synchronous Generator (PMSG), uncontrolled rectifier, DC-DC boost converter, and SPWM inverter feeding a standalone load has been formulated. The derived state space model is then simulated using Matlab/Simulink to test the model. As the standalone three phase load connected to the inverter demands constant output voltage irrespective of intermittent wind pattern, a PI controller is used to control the duty ratio of DC-DC boost converter to maintain constant output voltage at the inverter end.

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Vertical Axis Wind Turbine Improvement using DC-DC Boost Converter

E3S Web of Conferences ◽

10.1051/e3sconf/202018800017 ◽

2020 ◽

Vol 188 ◽

pp. 00017

Author(s):

Khairunnisa Khairunnisa ◽

Syaiful Rachman ◽

Edi Yohanes ◽

Awan Uji Krismanto ◽

Jazuli Fadil ◽

...

Keyword(s):

Wind Speed ◽

Wind Turbine ◽

Output Voltage ◽

Vertical Axis ◽

Input Voltage ◽

Pi Controller ◽

Boost Converter ◽

Oxide Semiconductor ◽

Vertical Axis Wind Turbine ◽

Constant Output

Vertical axis wind turbine (VAWT) can be operated in any direction of wind speed, but it has low rotation. To improve the performance of VAWT in which low rotation, this paper presents a simple control strategy of VAWT using a DC-DC boost converter to tap constant voltage in a standalone application. The main objective of this research is to maintain a constant output voltage of converter despite variation input voltage affected by variable wind speed. A simple proportional-integral (PI) controller has been used for a DC-DC boost converter and tested in MATLAB-Simulink environment, with the closed-loop system of the converter maintain constant output voltage although the wind speed is kept changing. The PI controller obtains the feedback from the output voltage of the boost converter to produce the correct pulse width modulation (PWM) duty cycle and trigger the metal oxide semiconductor field effect transistor (MOSFET) following the reference voltage of the turbine. This system has suppressed the value of overshoot and increased the efficiency of wind turbines as 34 %.

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