scholarly journals A Renewable Energy Fed Non-Isolated Inverse Output Voltage DC-DC Converter with Broad Range of Conversion

2019 ◽  
Vol 8 (5S3) ◽  
pp. 160-163
Keyword(s):  
Renewable Energy ◽  
Theoretical Analysis ◽  
Output Voltage ◽  
Conversion Ratio ◽  
Negative Voltage ◽  
Wide Range ◽  
Negative Output

Renewable Energy fed non-isolated negative output Converter with dc-dc conversion is proposed which employed for various applications. In industrial purposes only few converters are available for wide conversion ratio, the proposed design has come up with wide range negative voltage load applications. The proposed converter is analyzed and design for continuous condition mode. For verification of theoretical analysis, the proposed converter is simulated using PSIM 9.0.

scholarly journals Energy and noise characteristics of a SEPIC buck-boost converter with unipolar and bipolar output

2021 ◽  
Vol 9 (4) ◽  
pp. 9-19
Author(s):  
V. P. Babenko ◽  
V. K. Bityukov
Keyword(s):  
Output Voltage ◽  
Circuit Simulation ◽  
Spectral Characteristics ◽  
Magnetic Coupling ◽  
Input Voltage ◽  
Boost Converter ◽  
Practical Implementation ◽  
Noise Characteristics ◽  
Wide Range ◽  
Negative Output

Some advantages of the SEPIC buck-boost converter makes it stand out from other configurations. It makes possible to obtain from a unipolar input voltage both unipolar and bipolar output voltage with a good symmetry between positive and negative output voltages. It also provides efficient performance as well as circuit simplicity in unipolar and bipolar topology owing to the use of a single switch which can be operated by available integrated controllers of boost converters. The article considers the topologies of a SEPIC buck-boost converter built according to the traditional scheme (with two inductors) and according to the scheme on magnetically coupled chokes. To analyze the processes and factors affecting the converter operation efficiency, a circuit simulation has been done using the Electronics Workbench. The results of the investigation of a pulsed DC converter of input voltage to unipolar or bipolar output voltage using SEPIC buck-boost topology are presented. The circuit simulation enables to specify the switching process characteristics, to estimate the ripple level of the input current and its spectral characteristics, and to develop recommendations concerning the choice of parameters of converters elements and generation of control signals. Based on the simulation results, the load, control, and noise characteristics of the converter are obtained. The level of symmetry of positive and negative output voltage is investigated for the converter on discrete and magnetically coupled chokes. The assessment of the effect of leakage inductance on converters with magnetic coupling of inductive elements is given. Examples of practical implementation of converters built according to the SEPIC topology are shown. It is found that the resistance of the choke windings, which is less than 0.5 Ohm, has practically no effect on the efficiency of the converter, retaining the factor of about 0.9 in a wide range of load currents, while the main source of conversion losses is a passive diode switch. Synchronous converter circuits of a number of manufacturers are more efficient, but require more complex controllers for active switches with elements for protection against through currents.

scholarly journals A Novel Step-Up Converter with an Ultrahigh Voltage Conversion Ratio

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2693
Author(s):  
Faqiang Wang ◽  
Herbert Iu ◽  
Jing Li
Keyword(s):  
Theoretical Analysis ◽  
Output Voltage ◽  
Common Ground ◽  
Input Voltage ◽  
Conversion Ratio ◽  
Abrupt Changes ◽  
Capacitor Voltage ◽  
Power Switches ◽  
Voltage Conversion ◽  
Averaged Model

A new step-up converter with an ultrahigh voltage conversion ratio is proposed in this paper. Two power switches of such a converter, which conduct synchronically, and its output voltage, which has common ground and common polarity with its input voltage, lead to the simple control circuit. No abrupt changes in the capacitor voltage and the inductor current of the proposed step-up converter mean that it does not suffer from infinite capacitor current and inductor voltage. Two input inductors with different values can still allow the proposed step-up converter to work appropriately. An averaged model of the proposed step-up converter was built and one could see that it was still fourth-order even with its five storage elements. Some theoretical derivations, theoretical analysis, Saber simulations, and circuit experiments are provided to validate the effectiveness of the proposed step-up converter.

scholarly journals Aquila Optimization Based Harmonic Elimination in a Modified H-Bridge Inverter

2022 ◽  
Vol 14 (2) ◽  
pp. 929
Author(s):  
Md Reyaz Hussan ◽  
Mohammad Irfan Sarwar ◽  
Adil Sarwar ◽  
Mohd Tariq ◽  
Shafiq Ahmad ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Simulation Model ◽  
Smart Grids ◽  
Output Voltage ◽  
Input Voltage ◽  
High Quality ◽  
Matlab Simulink ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Wide Range

Multilevel inverters (MLIs) are capable of producing high-quality output voltage and handling large amounts of power. This reduces the size of the filter while also simplifying the circuitry. As a result, they have a wide range of applications in industries, particularly in smart grids. The input voltage boosting feature is required to use the MLI with renewable energy. Moreover, many components are required to get higher output voltage levels that add weight and cost to the circuit. Numerous MLI topologies have been identified to minimize the losses, device count, and device ratings. A seven-level modified H-bridge inverter with a reduced component count, and reduced THD is presented in this paper. Two DC sources with six IGBTs have been used to generate a seven-level output voltage, and the Aquila Optimizer (AO) has been implemented to get the regulated output. MATLAB/Simulink environment has been used for designing the simulation model. Furthermore, the simulation result has been validated in the laboratory on a hardware setup using the DSP-TMS320F28335 Launchpad. With the reduced number of switching devices as well as the dc supply, the size of the inverter is compacted and becomes more economical.

scholarly journals Metabolic engineering in woody plants: challenges, advances, and opportunities

aBIOTECH ◽  
2021 ◽  
Author(s):  
Shu Yu ◽  
Cody S. Bekkering ◽  
Li Tian
Keyword(s):  
Renewable Energy ◽  
Metabolic Engineering ◽  
Ecosystem Services ◽  
Plant Transformation ◽  
Woody Plants ◽  
Woody Plant ◽  
High Biomass ◽  
Generation Times ◽  
Wide Range ◽  
Biochemical Diversity

AbstractWoody plant species represent an invaluable reserve of biochemical diversity to which metabolic engineering can be applied to satisfy the need for commodity and specialty chemicals, pharmaceuticals, and renewable energy. Woody plants are particularly promising for this application due to their low input needs, high biomass, and immeasurable ecosystem services. However, existing challenges have hindered their widespread adoption in metabolic engineering efforts, such as long generation times, large and highly heterozygous genomes, and difficulties in transformation and regeneration. Recent advances in omics approaches, systems biology modeling, and plant transformation and regeneration methods provide effective approaches in overcoming these outstanding challenges. Promises brought by developments in this space are steadily opening the door to widespread metabolic engineering of woody plants to meet the global need for a wide range of sustainably sourced chemicals and materials.

scholarly journals Optimising the AR Engraved Structure on Light-Guide Facets for a Wide Range of Wavelengths

Optics ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 25-42
Author(s):  
Ioseph Gurwich ◽  
Yakov Greenberg ◽  
Kobi Harush ◽  
Yarden Tzabari
Keyword(s):  
Theoretical Analysis ◽  
Light Guide ◽  
Spectral Band ◽  
Angular Range ◽  
The Past ◽  
Input And Output ◽  
Wide Range ◽  
The Given ◽  
Theoretical Results ◽  
Shape And Size

The present study is aimed at designing anti-reflective (AR) engraving on the input–output surfaces of a rectangular light-guide. We estimate AR efficiency, by the transmittance level in the angular range, determined by the light-guide. Using nano-engraving, we achieve a uniform high transmission over a wide range of wavelengths. In the past, we used smoothed conical pins or indentations on the faces of light-guide crystal as the engraved structure. Here, we widen the class of pins under consideration, following the physical model developed in the previous paper. We analyze the smoothed pyramidal pins with different base shapes. The possible effect of randomization of the pins parameters is also examined. The results obtained demonstrate optimized engraved structure with parameters depending on the required spectral range and facet format. The predicted level of transmittance is close to 99%, and its flatness (estimated by the standard deviation) in the required wavelengths range is 0.2%. The theoretical analysis and numerical calculations indicate that the obtained results demonstrate the best transmission (reflection) we can expect for a facet with the given shape and size for the required spectral band. The approach is equally useful for any other form and of the facet. We also discuss a simple way of comparing experimental and theoretical results for a light-guide with the designed input and output features. In this study, as well as in our previous work, we restrict ourselves to rectangular facets. We also consider the limitations on maximal transmission produced by the size and shape of the light-guide facets. The theoretical analysis is performed for an infinite structure and serves as an upper bound on the transmittance for smaller-size apertures.

Biodiesel Renewable Energy and Transportation Consumption

2021 ◽  
Vol 12 (1) ◽  
pp. 77-77
Author(s):  
Suppanunta Romprasert ◽  
Korakot Kataboonyaruk ◽  
Natthacha Tangnititham ◽  
Tanyaluk Suwanthaijaroen ◽  
Maytavee Soonthornwattanachai ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Environmental Sustainability ◽  
Swot Analysis ◽  
Development Theory ◽  
Pm 2.5 ◽  
Quality Practices ◽  
Current Consumption ◽  
Wide Range ◽  
The Government ◽  
Set Up

Paper focuses on the renewable energy in Thailand. Objective is to compare risk on renewable energy and transportation consumption on biodiesel. It is using SWOT analysis and sustainable development theory as the tools. Besides, collecting data via questionnaire to investigate behaviors of people in having the ideas relating to biodiesel. The 52 responses from survey launching have returned. According to the results, the current consumption of biodiesel is still low because insufficient is on awareness of the consumers' trusts about biodiesel. Moreover, government's policy is not in good quality control. Biodiesel price has not been confirmed or set up in a clear standard that shows confidence in biodiesel to consumers. Remains adherence to diesel as it has been used for a longer period of time. Therefore, the risk of renewable energy in biodiesel is a relatively high risk. At the same time, in terms of environmental sustainability development, research results show that the use of biodiesel can help reducing air pollution at either PM 2.5 or global warming. Also, it would distribute an income to palm farmers. The results can be implemented for making improvements and suggesting recommendations to the government. A strengthening policy on renewable energy security and implement strategies is for solving various energy problems. With the concept of supporting research and development, it can create a wide range of knowledges, and the production of biodiesel as renewable energy. There should control the price structure, and the well quality practices to be fairly suitable in the nearly future. Keywords: Biodiesel, Consumption, Renewable Energy, Risk, Transportation

DEVELOPMENT OF CONSTRUCTION OF THREE-INPUT GENERATING INSTALLATIONS ON BASED OF RENEWABLE ENERGY SOURCES

2018 ◽  
Author(s):  
Я.М. КАШИН ◽  
Л.Е. КОПЕЛЕВИЧ ◽  
А.В. САМОРОДОВ ◽  
Ч. ПЭН
Keyword(s):  
Renewable Energy ◽  
Kinetic Energy ◽  
Total Energy ◽  
Thermal Energy ◽  
Output Voltage ◽  
Renewable Energy Sources ◽  
Electrical Energy ◽  
Energy Sources ◽  
Voltage Regulator ◽  
The Sun

Описаны конструктивные особенности трехвходовой аксиальной генераторной установки (ТАГУ), преобразующей кинетическую энергию ветра и световую энергию солнца и суммирующей механическую, световую и тепловую энергию с одновременным преобразованием полученной суммарной энергии в электрическую. Показаны преимущества ТАГУ перед двухвходовыми генераторными установками. Дополнительное включение стабилизатора напряжения в схему ТАГУ позволило расширить область применения стабилизированной трехвходовой аксиальной генераторной установки за счет стабилизации ее выходного напряжения. The design features of the three-input axial generating installation (TAGI), which converts the kinetic energy of wind and light energy of the sun and sums the mechanical, light and thermal energy with the simultaneous conversion of the total energy into electrical energy, are described. The benefits of TAGI in front of the two-input generating installation shown. The additional introduction of a voltage regulator into the TAGI scheme allowed to expand the scope of the stabilized three-input axial generating installation by stabilizing its output voltage.

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