Crosstalk in Electrical Connectors

2021 ◽  
Vol 3 (3) ◽  
pp. 54-59
Author(s):  
Van Tai NGUYEN ◽  
◽  
Vladimir Y. Kirillov ◽  
Keyword(s):  
Frequency Band ◽  
Electromagnetic Interference ◽  
Experimental Studies ◽  
Electrical System ◽  
Electrical Wire ◽  
Electrical Systems ◽  
Efficient Reduction ◽  
External Electromagnetic Fields ◽  
Resonance Nature ◽  
Electrical Connectors

Crosstalk electromagnetic interference occurs in on-board electrical wire bundles of aircraft electrical systems under the effect of external electromagnetic fields. Efficient reduction of crosstalk and elimination of their propagation paths in wire bundles can be achieved by shielding the conductors in the bundles and the bundles as a whole without breaks and discontinuities between the shields and housings of electrical connectors. The shielding of conductors in bundles does not eliminate the crosstalk completely, which can propagate through the contacts of electrical connectors. For estimating the influence of electrical connectors on the levels of crosstalk in electrical system circuits, their experimental studies should be carried out. In the course of these experimental studies, the interference voltage induced at the receptor contacts when voltage is applied to the source contacts in the specified frequency band is measured. The results from experimental studies of crosstalk for various types of electrical connectors in a specified frequency band make it possible to evaluate the resonance nature and levels of crosstalk interference levels depending on the relative position of the contacts and frequency.

High-voltage monitoring by the fiber-optic recirculating measuring system

2020 ◽  
pp. 38-44
Author(s):  
A. V. Polyakov ◽  
M. A. Ksenofontov
Keyword(s):  
Optical Fibers ◽  
High Voltage ◽  
Optical Sensors ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Electric Power Industry ◽  
Measuring System ◽  
Voltage Range ◽  
External Electromagnetic Fields ◽  
Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

Nanoelectromagnetic of the N-doped single wall carbon nanotube in the extremely high frequency band

Nanoscale ◽  
2017 ◽  
Vol 9 (37) ◽  
pp. 14192-14200 ◽  
Author(s):  
B. Aïssa ◽  
M. Nedil ◽  
J. Kroeger ◽  
M. I. Hossain ◽  
K. Mahmoud ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Frequency Band ◽  
Electromagnetic Interference ◽  
High Frequency ◽  
High Electrical Conductivity ◽  
High Frequency Band ◽  
High Demand ◽  
Extremely High Frequency ◽  
Minimal Thickness

Materials offering excellent mechanical flexibility, high electrical conductivity and electromagnetic interference (EMI) attenuation with minimal thickness are in high demand, particularly if they can be easily processed into films.

Experimental study of the possibilities of the production complex for diagnosing the operability of the electrical equipment system of cars

2020 ◽  
Keyword(s):  
Experimental Study ◽  
Experimental Studies ◽  
Electrical Equipment ◽  
Electrical System ◽  
Production Complex ◽  
Equipment System

The paper presents the results of experimental studies of the developed production complex for diagnosing the efficiency of electrical equipment of cars. Keywords automotive, automobile, diagnostics, electrical system

scholarly journals An Optimized HT-Based Method for the Analysis of Inter-Area Oscillations on Electrical Systems

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2935 ◽  
Author(s):  
Francesco Bonavolontà ◽  
Luigi Pio Di Noia ◽  
Davide Lauria ◽  
Annalisa Liccardo ◽  
Salvatore Tessitore
Keyword(s):  
Phasor Measurement Unit ◽  
Measurement Unit ◽  
Frequency Interval ◽  
Electrical System ◽  
Characteristic Parameters ◽  
Electrical Systems ◽  
Electromechanical Oscillations ◽  
Simulated Experiment ◽  
Novel Method ◽  
The Individual

The paper deals with a novel method to measure inter-area oscillations, i.e., electromechanical oscillations involving groups of generators geographically distant from one another and ranging within the frequency interval from 0.1 Hz up to 1 Hz. The estimation of the parameters characterizing inter-area oscillations is a crucial objective in order to take the necessary actions to avoid the instability of the transmission electrical system. The proposed approach is a signal-based method, which uses samples of electrical signals acquired by the phasor measurement unit (PMU) and processes them to extract the individual oscillations and, for each of them, determine their characteristic parameters such as frequency and damping. The method is based on Hilbert transformations, but it is optimized through further algorithms aiming at (i) improving the ability to separate different oscillatory components, even at frequencies very close to each other, (ii) enhancing the accuracy associated with the damping estimates of each oscillation, and (iii) increasing the robustness to the noise affecting the acquired signal. Results obtained in the presence of signals involving the composition of two oscillations, whose damping and frequency have been varied, are presented. Tests were conducted with signals either synthesized in simulated experiment or generated and acquired with actual laboratory instrumentation.

Suppressing Electromagnetic Interference in Switching Converters by Chaotic Duty Modulation

2017 ◽  
Author(s):  
Yuhong Song
Keyword(s):  
Frequency Band ◽  
Frequency Modulation ◽  
Electromagnetic Interference ◽  
Chaotic Signal ◽  
Industrial Applications ◽  
Switching Frequency ◽  
Switching Converters ◽  
Wide Frequency Band ◽  
Switching Converter ◽  
Driving Pulse

The switching converter generates serious electromagnetic interference (EMI), which impairs other devices‘ performance and harms human being’s health. As a way of chaos technique, chaotic modulation has been developed to suppress EMI of the switching converter by dispersing the energy into a wide frequency band and smoothing the peaks of the EMI spectrum. Unlike the well-studied chaotic frequency modulation, the chaotic duty modulation is concerned in this dissertation, which is just to change the duty of the transistor driving-pulse while maintains the fixed switching frequency. Chaotic duty modulation is realized by appending an external chaotic signal to the existing PWM module of the switching converter, which is practicable without the loss of the generality. It is thus verified that this proposal of using chaotic duty modulation in switching converters for EMI suppression is feasible and lays a foundation for industrial applications. ...

scholarly journals An Enhanced Methodology on Internet of Things with Cloud in Smart Electrical Systems

2019 ◽  
Vol 8 (3) ◽  
pp. 2295-2299
Keyword(s):  
Internet Of Things ◽  
Performance Management ◽  
Data Privacy ◽  
Homomorphic Encryption ◽  
Human Life ◽  
Vital Role ◽  
Electrical System ◽  
Privacy And Security ◽  
Security Issues ◽  
Electrical Systems

The smart management system plays a vital role in many domains and improves the reliability of protection and privacy of a system. Electrical systems have become a part in everyday human life. The next generation electrical systems will entirely depends on fully automated and smart control systems. In the present paper various mechanisms of cloud gateways and security issues are explored for smart management of an electrical system. The present survey work is reconnoitred with Internet of Things (IoT) in association with cloud. Cloud based IoT in smart electrical system provides potential enhancement of performance, management, and resilience of the smart system. However, the espousal of cloud based IoT system in smart electrical system to store and retrieve the data from cloud may increase risks in data privacy and security. Despite the different flaws in global integration of cloud with IoT through internet, various end-to-end security schemes are discussed to overcome these flaws. As a result in many of the applications easy IoT cloud gateway along with homomorphic encryption technique is set up to solve communication overheads and security issues.

scholarly journals Medical rehabilitation approaches in patients with implanted pacemaker

2020 ◽  
Vol 11 (1) ◽  
pp. 28-34
Author(s):  
Bakhram G. Iskenderov ◽  
Marina G. Ivanchukova ◽  
Natalya V. Berenshtejn
Keyword(s):  
Electromagnetic Interference ◽  
Cardiac Pacemaker ◽  
Cardiac Pacing ◽  
Rehabilitation Program ◽  
Social Adaptation ◽  
Medical Rehabilitation ◽  
Cardiac Pacemakers ◽  
Treatment Regimens ◽  
Rehabilitation Programs ◽  
External Electromagnetic Fields

In the following review article, the principles and approaches of medical rehabilitation in patients with implanted pacemakers are discussed. It was shown that total benefit results from cooperation among medical, physical and psychological components of rehabilitation program and optimisation of the mode and parameters of cardiac pacing. Social adaptation of the patients with implantable pacemakers is of paramount importance and should be directed on avoidance of external electromagnetic fields and their influence on pacemaker functions, which in turn may be life-threatening for patient and the staff as well. The indications to diagnostic and treatment regimens including physiotherapeutic procedures should be clearly defined in order to avoid potential influence of electromagnetic interference on cardiac pacemaker. The well-structured medical rehabilitation programs need to be organised in order to improve quality of life and patients survival with regard to growing tendency of implantation of cardiac pacemakers.

scholarly journals Cybersecurity of Microgrid: State-of-the-Art Review and Possible Directions of Future Research

2021 ◽  
Vol 11 (21) ◽  
pp. 9812
Author(s):  
Norziana Jamil ◽  
Qais Saif Qassim ◽  
Farah Aqilah Bohani ◽  
Muhamad Mansor ◽  
Vigna Kumaran Ramachandaramurthy
Keyword(s):  
Critical Infrastructure ◽  
State Of The Art ◽  
Advanced Technology ◽  
Future Research ◽  
Electrical System ◽  
Comprehensive Review ◽  
Electrical Systems ◽  
Wide Range ◽  
Future Work ◽  
The Impact

The infrastructure of and processes involved in a microgrid electrical system require advanced technology to facilitate connection among its various components in order to provide the intelligence and automation that can benefit users. As a consequence, the microgrid has vulnerabilities that can expose it to a wide range of attacks. If they are not adequately addressed, these vulnerabilities may have a destructive impact on a country’s critical infrastructure and economy. While the impact of exploiting vulnerabilities in them is understood, research on the cybersecurity of microgrids is inadequate. This paper provides a comprehensive review of microgrid cybersecurity. In particular, it (1) reviews the state-of-the-art microgrid electrical systems, communication protocols, standards, and vulnerabilities while highlighting prevalent solutions to cybersecurity-related issues in them; (2) provides recommendations to enhance the security of these systems by segregating layers of the microgrid, and (3) identifies the gap in research in the area, and suggests directions for future work to enhance the cybersecurity of microgrids.

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