scispace - formally typeset
Search or ask a question
Institution

Vignan University

EducationGuntur, Andhra Pradesh, India
About: Vignan University is a education organization based out in Guntur, Andhra Pradesh, India. It is known for research contribution in the topics: Control theory & CMOS. The organization has 1138 authors who have published 1381 publications receiving 7798 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: This paper presents the design and development of a fuzzy peak current controlled (FPCC) single-stage single-phase nonisolated AC/DC high-power factor LED drive and the control action is initially derived from a group of rules written in accordance with experience and intuitive reasoning.
Abstract: This paper presents the design and development of a fuzzy peak current controlled (FPCC) single-stage single-phase nonisolated AC/DC high-power factor LED drive. The proposed controller includes a fuzzy logic controller (FLC) in the loop voltage and a peak current controller in the loop current for an integrated nonisolated LED driver to attain a high-power factor (PF). The proposed control avoids complexities related to nonlinearities of the converter. The control action is initially derived from a group of rules written in accordance with experience and intuitive reasoning. The proposed technique is realized using a DSP processor (TI-TMS320F2812), which is capable of executing a high number of instructions in one cycle. A 70 W, 350 mA LED driver operating with an input of 90 V-230 V, 50 Hz was designed and implemented using MATLAB/Simulink. The results of the driver are in accordance with international regulations. The steady-state and transient responses are validated experimentally.

2 citations

Book ChapterDOI
01 Jan 2019
TL;DR: The data presented in this review presents knowledge on secondary metabolites isolated from algae in marine habitats, coral and sponge-associated endophytic fungi with a special emphasis on secondary metabolite production.
Abstract: The marine environment is endowed with novel and rich sources of structural and functional metabolites that have prospective biomedical applications. Several marine plants, algae, and invertebrates are known to have a huge number of fungal endophytes. Until now, only a few marine-derived fungal endophytes have been identified as producers of bioactive secondary metabolites compared to the inhabitants of higher plants. These fungal endophytes were recently documented to produce a plethora of signature molecules for exploitation in industry, agriculture, and medicine. Endophytic fungi associated with marine hosts are acquiring increasing importance as promising sources of structural and biological natural products. This review presents knowledge on secondary metabolites isolated from algae in marine habitats, coral and sponge-associated endophytic fungi with a special emphasis on secondary metabolite production. The data presented in this review presents knowledge on secondary metabolites isolated from algae in marine habitats, coral and sponge-associated endophytic fungi.

2 citations

Journal ArticleDOI
04 Feb 2021
TL;DR: In this article, the authors established some coincidence point results for f-nondecreasing self-mapping satisfying certain rational type contractions in the frame work of a metric space endowed with partial order.
Abstract: The purpose of this paper is to establish some coincidence point results for f-nondecreasing self-mapping satisfying certain rational type contractions in the frame work of a metric space endowed with partial order. Some consequences of the main result are given by involving integral type contractions in the space. Some examples are illustrated to support our results. Further, as an application we prove the existence of a unique solution of integral equation by the method of upper and lower solutions.

2 citations

Journal ArticleDOI
TL;DR: In this article, the microwave assisted synthesis of inorganic nanostructured materials and their composites has received great interest due to their potential applications in different fields of science and technology.
Abstract: We present an overview of microwave-assisted synthesis methods to develop inorganic nanostructured materials, which have received great interest due to their potential applications in different fields of science and technology. The current trend for the adoption of eco-friendly synthesis methods for the preparation of nanomaterials has presented a challenge to develop synthetic methods that offer significant reduction in reaction time, lower energy consumption, and less use of toxic chemicals. The microwave (MW) assisted synthesis route can play the role of a potential green synthesis approach to preparing inorganic nanostructured materials and their composites. In addition, the MW assisted route provides uniform heating throughout the reaction mixture and minimizes the non-uniform temperature profile, which results in the formation of uniform small nanomaterials. This review discusses the basic principles of MW synthesis to understand the MW heating mechanism. In addition, we discuss recent progress on the development of inorganic nanostructures in liquid phase by MW synthesis technique. Finally, we present the application of microwave synthesized nanomaterials in the development of battery technology, followed by safety features and future aspects of MW synthesis.

2 citations

Proceedings ArticleDOI
01 Jan 2016
TL;DR: In this paper, a control system which is based on neuro fuzzy is proposed to improve the low voltage ride and also voltage profile until the converter retrieves the normal operation of Doubly fed induction generator.
Abstract: Doubly Fed Induction Generator is especially used as wind power generators. This paper presents a control system which is based on neuro fuzzy because conventional PI controller based system does not operate satisfactorily as the operating point change. The proposed controller allows regulation in the active and reactive power efficiency. In this it takes the inputs as slip frequency, reactive power and active power to produce the voltage equal to cascaded arrangement speed. The proposed controller improves the low voltage ride and also voltage profile until the converter retrieves the normal operation. . As the wind turbine of speed is variable time to time. This causes fluctuations in the output of Doubly fed induction generator and also affects the active & reactive power. If the reactive power changes then the power factor will also be affected. Unlike existed controller, in this the reactive power along with wind turbine speed is considered as inputs to the controller to maintain better power factor. The proposed model is implemented in Matlab/simulink. The percentage THD of the voltage profiles is reduced

2 citations


Authors
Network Information
Related Institutions (5)
National Institute of Technology, Kurukshetra
5.1K papers, 53.9K citations

76% related

Amrita Vishwa Vidyapeetham
11K papers, 76.1K citations

76% related

National Institute of Technology, Rourkela
10.7K papers, 150.1K citations

75% related

SRM University
11.7K papers, 103.7K citations

75% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202322
202231
2021352
2020254
2019250
2018159