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This paper is devoted to a detailed experimentally based analysis of applicability of vector network analyzers for measuring impedance of surface mount inductors with and without DC bias. The measurements are made using custom-made bias tees and a test fixture with an ordinary vector network analyzer. The main attention in the analysis is focused on measurement accuracy of an impedance of surface...
The purpose of this paper is to address current issues in industrial robotics applications and to address also the current trends occurring in the industry regarding smaller mobile units in factory and external manufacturing processes relating to the battery powering of robotics devices. Specifically, we shall concentrate the efforts herein on “Mobile Industrial Robotics”. The paper touches briefly...
Mutual couplings between EMI filter components are of key concern when designing EMI filters for EMI attenuation in high frequency range. To reduce the parasitic couplings and improve EMI attenuation conductive shields can be placed between the components. This paper presents modeling and measurements of EMI filters with copper shields placed between the filter components. 3D electromagnetic field...
Modeling of differential mode EMI filter is presented in this paper. 3D electromagnetic field modeling software CST MWS is used as a simulation tool. EMI filter consisting of two capacitors and two inductors is modeled considering parasitic mutual couplings between EMI filter components. Modeling is performed for different positions of capacitors and inductors on both single-sided and double-sided...
This paper deals with modeling of differential mode Il-type EMI power filter using 3D electromagnetic field modeling software CST MWS. Two scenarios are considered: inductor is positioned in parallel or perpendicular to capacitors. Capacitor distance and PCB track layout is changed to verify software modeling precision and capabilities. Measurement and modeling results are in good agreement.
This paper deals with modeling of mutual couplings between passive EMI filter components: inductors and capacitors positioned on printed circuit board. 3D electromagnetic software CST MWS is used for the modeling. Three scenarios are considered: mutual couplings between two capacitors, mutual couplings between two inductors and mutual couplings between inductor and capacitor. Modeling results are...
This paper is devoted to EMI filter inductor modeling and mutual coupling modeling between two inductors positioned on PCB. 3D inductor models are developed and modeled in CST MWS. Comparison of inductors mutual coupling measurement and modeling results show that transfer coefficients can be predicted accurately. CST MWS has been used also to predict effective mutual coupling reduction techniques.
In this paper modeling of EMI filter capacitors and modeling of mutual couplings between them is presented. The modeling has been done using 3D electromagnetic software CST MWS. Three capacitor models have been proposed and verified experimentally. All proposed models during verification have shown that their performance is high enough to enable PCB mounted capacitor modeling and mutual inductance...
Intelligent “street lighting”, along with its immense energy saving potential, relies upon many factors, not least, the importance of maintaining useable levels of light for both vehicles and pedestrian traffic. One element in the establishment of such a regime is the development of sensory equipment capable of vehicle and human detection with a negligible degree of error. The paper proposes a hybrid...
The extension of mobility opportunities foreseen in Erasmus plus from European to the international education community has to be supported by standards in the similar study programs. The best practice of curricula voluntary standardization gained during Tempus project implementation in EU and non-EU countries consortia is described. The benefits from extension of novel voluntary standardization approach...
Critical infrastructure's (CI) (electricity, heat, water, information and communication technology networks) security, stability and reliability are closely related to the interaction phenomenon. Due to the increasing amount of data transferred, increases dependence on telecommunications and internet services, the data integrity and security is becoming a very important aspect for the utility services...
The upgrading of the DH system through installing wireless sensor networks (WSN) - a technology by which to monitor and control quality operation of the DH system - will lead to more effective use of thermal energy, enabling also the provision of quality customer services, as the data concerning the status of the existing networks is available in a timely manner, and in the stated amounts. Over the...
Intelligent LED dimmer demand in lighting market is increasing due to energy saving potential, environment protection as well as great possibility of control and management of lighting systems. An internet web browser controlled LED lighting systems is developed and described in the article. The 1st is radio-wave and internet implementation between LED light source (lamp) and control point. The 2nd...
Creation of good knowledge is based on practical exercise combined with theory learning. Studies in electrical engineering require many different laboratory exercises, traditionally carried out within the premises of university, where students can practice only several hours per week or even less. Such limited possibilities stipulate longer course durations and reduce knowledge creation quality. Possibility...
This paper presents simulation and experimental results of a quasi-Z-source inverter (qZSI) based bi-directional DC/DC converter for supercapacitor (SC) interfacing. The bidirectional capability provides both the charging and discharging of the SC. During the charging mode the converter operates as a conventional VSI performing the voltage buck function, but during the discharging mode the converter...
Nowadays, there is a growing need to develop appropriate methods to acquire, process and interpret large amounts of data in real time to assist the decision making process for optimal drinking water distribution systems management. The presented wireless AMR methodology, which was piloted in Talsi city, is designed as warning systems to prompt the appropriate response to eliminate or mitigate leaks,...
The article describes public transport co-modality for sustainable development of a public transport system. New strategies are needed to make the city public transport more efficient, more accessible and more sustainable. There are some concepts described in the article. The concepts are illustrated with practical examples - how it is possible to increase the capacity of infrastructure and what has...
Objective of this paper is to design a structure of a safety control system for electric vehicles' circuits, drives and brakes. The authors review analysis methods used to detect electrical circuits, engines and brakes failures during its operation while outside the technical service environment. The authors examine the algorithms used in artificial immune systems to review possibility to apply them...
The present work considers issues about optimization of the tooth zone of homopolar inductor generator with non-overlapping concentrated coils. The recommendations for the choice of optimal parameters of the tooth zone are made on the basis of the analysis of magnetic field in the machine's cross-section. The results of the experiment data of the inductor generator's test sample with the power of...
The self sufficient power supply and production on district level are analyzed. The possibilities to use alternative energy production nearby energy consumption in rural regions with industrials are described. The control procedures for power supply consumption on district level are developed. The example for Latvia condition is described.
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