Results 21 to 30 of about 20,654 (228)

Time-Based High-Pass, Low-Pass, Shelf, and Notch Filters

open access: yesElektronika ir Elektrotechnika, 2023
This paper presents formulations for time-based first-order and second-order high-pass, shelf, and notch filters. These formulations are an extension to the existing literature where low-pass filters are already developed using a multiphase controlled ...
Nicolai J. Dahl   +2 more
doaj   +1 more source

Design and Implementation of High Frequency and Low-Power Phase-locked Loop

open access: yesU.Porto Journal of Engineering, 2021
Phase-locked loop (PLL) operates at a high frequency and due to the increased switching rate of the circuits, the power consumption is high. Designing a PLL which consumes less power without compromising the frequency of operation is essential.
Premananda B. S.   +3 more
doaj   +1 more source

Modeling and Robust Control of a Grid Connected Direct Driven PMSG Wind Turbine By ADRC

open access: yesAdvances in Electrical and Electronic Engineering, 2018
In this paper, we present the modeling and control of a grid connected Variable Speed Wind Energy Conversion System (VS-WECS) based on a Direct Driven Permanent Magnet Synchronous Generator (DD-PMSG).
Imad Aboudrar   +3 more
doaj   +1 more source

An advanced hybrid pre-filtering/in-loop-filtering based PLL under adverse grid conditions

open access: yesEngineering Science and Technology, an International Journal, 2021
The amplitude, frequency and phase angle of the grid voltage are essential three components to ensure synchronization for grid interactive inverters.
Fehmi Sevilmiş, Hulusi Karaca
doaj   +1 more source

Modeling and frequency characteristic analysis of DSOGI-PLL in dq reference frame

open access: yesEnergy Reports, 2021
Dual second-order generalized integrator phase-locked loop (DSOGI-PLL) is widely used in grid-connected system for grid synchronization because of its simple implementation and good filtering capability.
Yongxin Zhang   +5 more
doaj   +1 more source

Influence of PLL on synthetic inertia of DFIG wind turbine in droop controlled microgrids

open access: yesThe Journal of Engineering, 2019
Islanded microgrids allow for a continuous supply of customers even when there is an outage in the bulk power system. The frequency control and stability in microgrids is an ongoing field of research.
Simon Eberlein, Krzysztof Rudion
doaj   +1 more source

Hydrophilic Natural Polylysine as Drug Nanocarrier for Preparation of Helical Delivery System

open access: yesPharmaceutics, 2022
Polypeptide materials have clear secondary structure and biodegradability, which can be further modified and functionalized, so that they can be employed as therapeutic agents in clinical applications. PEGylation of polylysine (PEG-PLL) is a kind of safe
Bo Yu   +4 more
doaj   +1 more source

Low Power 24 GHz ad hoc Networking System Based on TDOA for Indoor Localization

open access: yesISPRS International Journal of Geo-Information, 2013
This paper introduces the key elements of a novel low-power, high precision localization system based on Time-Difference-of-Arrival (TDOA) distance measurements. The combination of multiple localizable sensor nodes, leads to an ad hoc network.
Melanie Jung   +3 more
doaj   +1 more source

Integral‐type half‐tangent phase‐locked loop for more electric aircraft grids

open access: yesIET Power Electronics, 2023
In this paper, an integral‐type half‐tangent phase‐locked loop (IHTan‐PLL) is proposed for the varying‐frequency AC grids of more electric aircraft (MEA).
Yiyun Zhao   +5 more
doaj   +1 more source

Sensorless control for surface mounted PM machine with a high inertial load

open access: yesCES Transactions on Electrical Machines and Systems, 2018
PM machine or Permanent magnet synchronous motor (PMSM) is a nonlinear system with multivariable couplings. To achieve the sensorless control of a PMSM with high inertial load, a modified current observer, using PI regulator instead of sliding mode ...
Qidong Li   +4 more
doaj   +1 more source

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