Results 51 to 60 of about 1,285 (202)

Fiabilidad y validez del cuestionario SAPF y del pictograma de Stunkard en población mayor española

, 2021
Resumen Fundamento: El objetivo de este estudio fue identificar la fiabilidad y validez del cuestionario SAPF y del pictograma de Stunkard para conocer la forma física autopercibida y el grado de insatisfacción corporal en un grupo de personas mayores ...
Varela,S, Martínez-Aldao,D, Ayán Pérez,C, Sanchez-Lastra,MA, Diz,JC   +4 more
core   +1 more source

Self tunning filter for three levels four legs shunt active power filter with fuzzy logic controller

Acta Polytechnica, 2021
The low harmonic distortion and reduced switching losses are the advantages of using the multilevel inverter. For this purpose, the three-level inverter is used in this paper as a three-phase four-leg shunt active power filter (SAPF). The SAPF is used to
Dahmane Djendaoui, Amar Benaissa, Boualaga Rabhi, Laid Zellouma   +3 more
doaj   +1 more source

Real‐Time Implementation of Unknown Input Observer‐Based State and Unknown Disturbance Estimation for Series Active Filters

International Journal of Circuit Theory and Applications, Volume 53, Issue 7, Page 3970-3992, July 2025.
For the series active filter (SAF), a combined controller and observer scheme is proposed. Two controllers—state feedback (SFB) and linear quadratic regulator (LQR)—along with state observers, including the Luenberger observer (LO), proportional–integral observer (PIO), and unknown input observer (UIO), have been designed.
Nagulapati Kiran, I. E. S. Naidu
wiley   +1 more source

Improving power quality with the use of a new method of serial active power filter (SAPF) control [PDF]

, 2017
The quality of electric energy has currently become a widely discussed issue. The operation of appliances with nonlinear power consumption and with harmonic distorted current leads to voltage drops on network impedance, which in turn leads to power ...
Roman Hrbac, Kolář, Václav, Hrbáč, Roman, Mlčák, Tomáš, Tomas Mlcak, Vaclav Kolar   +5 more
core   +1 more source

An Efficient Multi‐Core DSP Power Management Controller

Engineering Reports, Volume 7, Issue 4, April 2025.
This work proposes a power management controller for multi‐core DSP architectures, specifically designed for FT‐xDSP. The primary contributions include a clamp request control unit to ensure system stability during asynchronous resets, and a configurable state transition counter that optimizes clock transitions.
Jian Huang, Huili Wang, Guohui Gong, Lei Wang, Xiaowen Chen   +4 more
wiley   +1 more source

Robust control of shunt active power filter using interval type-2 fuzzy logic controller for power quality improvement [PDF]

, 2017
Dobro je poznato da se usporedno aktivni filtar snage (SAPF - Shunt Active Power Filter) uvelike koristi za smanjenje harmonijske distorzije i kompenzaciju reaktivne snage u elektroenergetskim sustavima. Regulator napona sabirnice istosmjerne struje SAPF-
Kececioglu, O. Fatih, Sekkeli, Mustafa, Acikgoz, Hakan, O. Fatih Kececioglu, Mustafa Sekkeli, Gani, Ahmet, Mustafa Tekin, Hakan Acikgoz, Tekin, Mustafa, Ahmet Gani   +9 more
core   +1 more source

Impacts of Nonlinear Loads on the Power Quality of Solar Microgrids and Proposed Mitigation Strategies

Energy Science &Engineering, Volume 13, Issue 4, Page 1960-1982, April 2025.
Nonlinear loads in solar microgrids introduce power quality issues such as harmonics, voltage distortions, and reduced system efficiency. These disturbances negatively impact the stability and performance of microgrid components, leading to increased losses and potential equipment damage.
Exaud Tweve, Baraka Kichonge, Thomas Kivevele   +2 more
wiley   +1 more source

Shunt Active Power Filter with Three Level Inverter using Hysteresis Current Controllers [PDF]

E3S Web of Conferences
This document introduces a Shunt Active Power Filter (SAPF) for three-phase three-wire systems, utilizing a Cascaded H Bridge Multilevel Inverter. The Hysteresis Current Control technique provides numerous benefits, including simplicity, minimal current ...
Raghutu Ramakrishna, Manoj Vasupalli, Kumar Yegireddy Narendra   +2 more
doaj   +1 more source

PZS‐Net: Incorporating of Frame Sequence and Multi‐Scale Priors for Prostate Zonal Segmentation in Transrectal Ultrasound

Advanced Intelligent Systems, Volume 7, Issue 1, January 2025.
A deep‐learning‐based segmentation method that aimed to segment prostate zones in transrectal ultrasound videos shows results similar to the labels annotated by expert urologists in a prospectively acquired test database. The method is demonstrated to significantly improve prostate zonal segmentation compared with popular segmentation methods.
Jianguo Ju, Qian Zhang, Pengfei Xu, Tiange Liu, Cheng Li, Ziyu Guan   +5 more
wiley   +1 more source

Model Predictive Current Control for Low-Cost Shunt Active Power Filter

CSEE Journal of Power and Energy Systems
Performance of a three-phase shunt active power filter (SAPF) relies on the capability of the controller to track the reference current. Therefore, designing an accurate current controller is crucial to guarantee satisfactory SAPF operation.
Ali A. Abdel-Aziz, Mohamed A. Elgenedy, Barry W. Williams   +2 more
doaj   +1 more source