Burgas Free University Academic Research Repository
Академично научно хранилище на Бургаския свободен университет
Communities in DSpace
Select a community to browse its collections.
Recent Submissions
ИНТЕГРИРАНА СИСТЕМА ЗА УПРАВЛЕНИЕ НА ЗДРАВЕТО И БЕЗОПАСНОСТТА ПРИ РАБОТА В МИННАТА ИНДУСТРИЯ
(Бургаски Свободен Университет, 2025) Долчинков, Радостин
The mineral and raw materials industry is by default a labor-intensive industry and in these conditions the proper development and management of human capital is one of the main factors for the prosperity of companies in the industry. Throughout Europe, in the last few decades, workplace safety and personnel health have been viewed through the prism of a higher level of comfort and uncompromising security with regard to the human factor. With the development of technologies, an increasing share refers to the remote control of machines at a high level of danger to the life and health of workers. The EC's categorical opinion is that collective protective measures and the fight against hazards at their sources are fundamental principles of prevention. The quality of working conditions is tracked as a significant increase in labor productivity and therefore the economic growth of companies and is one of the most important prerequisites for the satisfaction of workers. This leads to higher levels of employment, prosperity of regions, a higher standard of mining communities.
СЪЩНОСТ НА ТЯГОВИЯ ИНВЕРТОР И НЕГОВОТО ЗНАЧЕНИЕ ЗА ЕЛЕКТРИЧЕСКИТЕ ПРЕВОЗНИ СРЕДСТВА - ЧАСТ 2
(Бургаски Свободен Университет, 2025) Марева, Даниела
The use of advanced technologies and solutions in the semiconductor industry allows automakers to reduce the cost of electric vehicles, extend range, improve comfort, and offer more electric motor options with a scalable approach. New innovations in microcontrollers, integrated power transistor drivers and key converters can significantly improve electric vehicle parameters such as battery cost, power density and efficiency, as well as offer additional safety features.
СЪЩНОСТ НА ТЯГОВИЯ ИНВЕРТОР И НЕГОВОТО ЗНАЧЕНИЕ ЗА ЕЛЕКТРИЧЕСКИТЕ ПРЕВОЗНИ СРЕДСТВА - ЧАСТ 1
(Бургаски Свободен Университет, 2025) Марева, Даниела
Engineers and designers of electric and hybrid vehicles are faced with the important question of how to adequately configure the necessary powertrain components to achieve the required performance and operational goals. The main technical parameters of an electric vehicle (EV) are its battery and electric traction motor. But the link between them is a third equally important element - the power inverter. This inverter converts the high-voltage direct current from the battery into alternating current, usually three-phase, for the needs of the electric motor. This so-called traction inverter affects several parameters: the speed and torque of the traction motor. The efficiency of the inverter is also essential, influencing the power, the thermal dissipation of the inverter and the maximum range of the electric vehicle.
AN APPROACH OF ENERGY GRID BALANCE BY V2G TEHCNOLOGY
(Бургаски Свободен Университет, 2025) Kostadinov, Todor
The large amount of renewable energy sources share in the modern power grids affects the ability to maintaining grid stability and reliability due to their variable nature. On the other hand, the increasing amount of battery electric vehicles offers the ability to balance the power grid. To obtain efficient control communication between EV and the grid is required. Vehicle-to-Grid (V2G) technology offers a solution by enabling bidirectional energy flow between electric vehicles and the power grid. This paper presents an approach of energy system balance by V2G. By using EVs as dynamic energy storage units, V2G can support peak load reduction, frequency regulation, and voltage stabilization, enhancing the flexibility of the energy infrastructure.
DESIGN OF A HYBRID SOLAR SYSTEM
(Бургаски Свободен Университет, 2025) Kostadinov, Todor; Bakalov, Ivelin
The increasing demand on independent energy sources moves the scale of solar systems from large industrial solar farms providing to medium size farms suitable for businesses and small household-based systems. In contrast to the large solar fields providing hundreds of megawatts, the medium and small ones vary from several to several hundred kilowatts and do not have to meet industrial requirements. The lowered price of solar equipment allows designing a solar system that meets the custom needs of the users. To design such system a knowledge of the specifics of the solar systems is of the highest importance. This paper aims to present a design approach to build custom solar system, provide seamless operation 24/7.