In this paper, a single-phase to three-phase converter is proposed to provide variable output voltage and frequency. The proposed topology employs only six IGBT switches, which form the front-end rectifier and the output inverter for the one step conversion from single-phase supply to output three-phase supply. The front-end rectifier permits bidirectional power flow and provides excellent regulation against fluctuations in source voltage. Moreover, it incorporates active input current shaping feature. An easy method to implement control strategy is proposed. This control strategy ensures nearly unity input power factor with sinusoidal input current over the operating range. Based on sensorless vector control technique, the proposed converter is used for the speed control of the three-phase induction motor. A low cost motor drive can be achieved using the proposed converter and control technique. Simulation and experimental results are carried out to analyse and explore the characteristics of the low cost drive system.
Buildings are the largest consumers of energy, accounting for nearly 40% of all energy used. Therefore, an effective method of reducing energy consumption is to create and design more efficient buildings. In this paper details of a sustainable and green building design for a small residential home are presented. This design is unique in that it is built to Passive house standards, and using shipping containers. The structure will use four 20 ft. (6.1 m) high and one 40 ft. (12.2 m) high cube containers, with the four 20 ft. (6.1 m) making up the main floor and the 40 ft. (12.2 m) forming the second floor. The size is a modest 820 sq. ft. (76.2 m2) designed for a family with one or two children.
The goal for the building is to be as self-sufficient as possible which makes it ideally suited to an ‘off-grid’ rural setting. However, it can be adapted to be ‘on-grid’ as well. Solar energy will provide all the electricity needs through a photovoltaic battery system, and warm water with a solar water heater. The site will be water neutral by utilising rainwater harvesting and on site waste water treatment. The results from energy modelling, using HOT2000, are presented, as well as an in-depth analysis on different insulation types and strategies. Finally, a cost estimate exercise is conducted and results compared to other passive houses and traditional code compliance buildings.
The world is running out of the oil and natural resources with each passing day. Most of the electricity around the world is generated using natural resources. E-governments are trying to move the electricity production from natural resources to hydro and solar generation. For the places such as in the Middle East and deserted areas in Sindh district of Pakistan, where water resources are low and solar is superlative for generating electrical energy. The objective of this research is to implement, model, design and simulate the Photovoltaic Solar Monitoring (PVSM) systems. The simulation for the system is implemented on LabVIEW software and tests are carried out for certain values of input. All the details, expected outcomes, problems, and results are part of this research.
The scope of this research is to obtain the results using real-time simulations performed in LabVIEW. The simulation performed in LabVIEW mimics the implementation of the advanced automation and control system technique Supervisory control and data acquisition (SCADA). The objective of this research work is to perform the essential simulation that is required to investigate current products for PV factors monitoring that influence solar panels efficiency. The goals are: to design and to develop a system for monitoring the PV solar systems using LabVIEW, to simulate the performance of PV solar system using the theoretical methods, to monitor system by means of LabVIEW and to show theoretical effects in the method of the curve of PV performance parameters. Implementing the interfacing technique at home level to monitor the local solar parameters helps in utilizing the solar generated energy in an efficient way. Analysis in LabVIEW helps in studying the parametric condition of the environment where solar is required to be installed.
Összefoglalás. Az elektronikusan tárolt információ biztonsága,
általánosabban véve a kiberbiztonság, az egyik legnagyobb kihívás a 21. században.
Folyamatosan jelennek meg újabb és újabb fenyegetések, melyekre innovatív és újszerű
megoldásokat kell adni. Ezek az innovatív megoldások mindenképpen magukkal hozzák az
olyan új típusú technológiák használatát az információbiztonságban, mint például a
Nagy Adatokból (Big Data) való építkezés és az erre épülő mesterséges intelligencia.
Ennek támogatása érdekében az Európai Unió a 2021 és 2027 közötti időszakban kiemelt
fontosságúnak tartja a kiberbiztonsági innovációkat. A tanulmány bemutatja a
kiberbiztonsági kompetenciahálózatok tervezetét, illetve ismerteti, hogy milyen
kutatás-fejlesztés-innovációs lehetőségek lesznek a következő évtizedben
Summary. Security of stored digital information and more generally,
cybersecurity is one of the biggest challenges of the 21st century. Besides the
negative effects of cybercrime, cyberespionage, or other state sponsored activities,
like cyberwarfare, our society and economy should face the exposure of
infocommunication systems all around us. At the dawn of 4th industrial revolution
when the whole world is going to be digitalized and will be surrounded by networked
digital devices in homes, cities and industry, new threats are constantly emerging
that need to be responded with new innovative solutions. These innovative solutions
should include the usage of big data and artificial intelligence built onto it. They
should also give a response for the inherited risks of legacy systems that can be
found in many critical information infrastructures. Meanwhile, they should protect
the digital privacy of citizens by not giving out unnecessary user data which is
contradictory with the need of big data and AI mentioned before.
Due to the emerging cybersecurity threats and the virtually non-existence of European
cybersecurity market, European Union gives high importance for cybersecurity
innovation and will support it between 2021 and 2027. In the proposed budget for this
period, approximately 3 billion of euros is expected to be spent to cybersecurity
related research. On the one hand, that fund may help European research institutes,
enterprises, and startups to appear on the global market, on the other hand this is
the only possible way to regain Europe’s digital independence from the United States
and China. In alignment with the European security policy, these innovative solutions
may also lead to reducing the amount of cybercrime, ensure the resilience of
continental critical information infrastructure and can help to establish strong
European cyberwarfare capabilities. As Ursula von der Leyden, president of the
European Commission said in her op-ed in February 2020, “The point is that Europe’s
digital transition must protect and empower citizens, businesses and society as a
whole. It has to deliver for people so that they feel the benefits of technology in
their lives. To make this happen, Europe needs to have its own digital capacities –
be it quantum computing, 5G, cybersecurity or artificial intelligence (AI). These are
some of the technologies we have identified as areas for strategic investment, for
which EU funding can draw in national and private sector funds.” The study presents
the draft of cybersecurity competence networks and describes what R&D&I
possibilities will be in Europe in the next decade.
Authors:Kristóf Roland Horváth and István Kistelegdi
-efficiency [ 14 ]. 3 The ‘reborn home’ project Composed from the most widely applied structures and materials in the 60s - 70s with a simple ashlar-shape and a saddle roof, it was conceived as a demonstrative residential retrofitting example of an energy
Authors:István Szűcs, Andrea Bauerné Gáthy, Angéla Soltész, and Laura Mihály-Karnai
can make ends meet, but we cannot save any 144 28.8 We life off our income and we can save money 188 37.6 We life off our income very well and we can save money 145 29.0 Place of residence during the study period At home 221 44.2 In a dormitory 112 22
based on this point as well. The distance between the scaled sheet and the laser unit was 2,000 [mm]. The robot arm was returned to its HOME position before every measurement. Table 3 shows the individual angles of each axis. Table 3. Axis angles at