Results 21 to 30 of about 38,832 (252)

Eco-efficiency of passive solar heating [PDF]

E3S Web of Conferences, 2019
The article presents calculations of the energy efficiency of direct solar heating and sunspace, located on the building facades of various orientations, in the climatic conditions of the southern coast of Crimea.
Klevets Ksenia, Dvoretsky Alexander, Spiridonov Alexander   +2 more
doaj   +1 more source

On the Design of a Diaphragm Valve for Aerostatic Bearings [PDF]

E3S Web of Conferences, 2020
Because of their almost zero friction, cleanness and long life, aerostatic bearings are commonly used in many applications where high precision of positioning is required, e.g.
Lentini Luigi, Colombo Federico, Trivella Andrea, Raparelli Terenziano, Viktorov Vladimir   +4 more
doaj   +1 more source

The Design of Hybrid Active Power Filter based on Harmonics Detection and Its Simulation Research

Chemical Engineering Transactions, 2016
This paper puts forward a design method of hybrid active power filter which is based on harmonics detection and identifying. Firstly the paper analyzes damage and causes of the harmonics, then several solutions to harmonics problems are devoted to ...
Z.Y. Ma
doaj   +1 more source

Passive‐compensation clamp‐on two‐stage current transformer for online calibration

IET Science, Measurement & Technology, 2021
Digital measurement equipment such as electronic transformers enable real‐time functional control and monitoring systems to be built in power grids to accommodate the large‐scale access of distributed renewable energy to the grid.
Haoliang Hu, Yan Xu, Xiong Wu, Fuchang Lin, Xia Xiao, Min Lei   +5 more
doaj   +1 more source

New trends in active filters for improving power quality

, 1996
Since their basic compensation principles were proposed around 1970, active filters have been studied by many researchers and engineers aiming to put them into practical applications.
H. Akagi, Akagi, Hirofumi
core   +1 more source

Adaptive Minimum-Entropy Hybrid Compensation for Compound Faults of Non-Gaussian Stochastic Systems

IEEE Access, 2019
This study investigated minimum-entropy hybrid fault-tolerant control (FTC) theory for non-Gaussian stochastic systems with compound faults. After fuzzy linearization for the singular systems, the output probability density function (PDF) is generated by
Kaiyu Hu, Fuyang Chen, Zian Cheng, Changyun Wen   +3 more
doaj   +1 more source

Research on the Steam Valve Joystick Loading System and its Control Strategy

IEEE Access, 2020
In this paper, an idea about the hydraulic loading device is proposed to simulate the working mechanical environment of the steam valve joystick. The simulation based on the mathematical model of active and passive loading system is utilized to reveal ...
Bing Zhang, Hua Huang, Jiamin Cai, Ziliang Jiang, Pengfei Qian   +4 more
doaj   +1 more source

Compensation of Budeanu’s Reactive and Complemented Reactive Currents in Extended Budeanu Theory in 3-Phase 4-Wire Systems Powered by Symmetrical Nonsinusoidal Voltage Source

Energies
The result of continuous efforts in the development of power theory, Budeanu’s power theory was successfully extended. The mathematical description that has been proposed is based on another concept, namely the Currents’ Physical Components (CPC) theory.
Zbigniew Sołjan, Tomasz Popławski, Marek Kurkowski, Maciej Zajkowski   +3 more
doaj   +1 more source

New Topology of a Hybrid, Three-Phase, Four-Wire Shunt Active Power Filter

Energies, 2023
With a view to reducing harmonic content in electrical power systems, and, consequently, improving power quality level, filters and other harmonic compensation devices are widely used.
Stefani Freitas, Luis Carlos Oliveira, Priscila Oliveira, Bruno Exposto, José Gabriel Pinto, Joao L. Afonso   +5 more
doaj   +1 more source

The diagram of passive compensation system.

, 2015
The diagram of passive compensation system.
Yang Tang (152970), Qingyou Liu (771690), Chong Xie (771692), Chongjun Huang (771691)   +3 more
core   +1 more source