CONTROLLED TESTING OF BELT TRANSMISSIONS AT DIFFERENT LOADS

The presented paper provides the alternative options for determining the condition of belt gear based on the testing and monitoring. In order to carry out experimental measurements, a newly developed device for testing, monitoring and diagnostics of belt drives was designed, as well as the possibility of determination of limit states by extreme loads. The designed measuring stand allows to determine the point of destruction of the belt for an extreme load. The process of the belt measurement was to set the predetermined input revolutions of the driving motor by means of the Altivar 71 (FM1) frequency inverter connected to the driving electric motor. The next step in defining the input parameters was to set the load on the driven electric motor. The load on the driven motor was achieved by the torsional moment set by means of the Altivar 71 (FM2) frequency inverter connected to the driven electric motor. In the paper, the analytical calculation is processed. The article mainly points to the innovation of the stand for testing belt transmissions.

ENERGIA RENOVÁVEL; UTILIZAÇÃO DE ENERGIA SOLAR PARA ACIONAMENTO DE TELHADO MÓVEL.

The present work aims to exemplify a renewable and sustainable energy source as such the energy from sunlight to drive mobile coverage as a clean source of energy that does not cause damage to the environment, taking advantage of solar energy as a source of heat and light being one of the most propitious and reliable energies in the world. With the installation of solar panels at the roof top of houses, industries and plantations, the energy captured by the photovoltaic solar panel is sent to the load controller that powers the battery and the frequency inverter energizes the motor , allowing the activation of the cover with the objective of bringing greater comfort and satisfaction of our final client, people who want to have comfort in relation to their roofs, taking advantage of more than nature has to offer us, not only in homes but also in areas of leisure and entertainment, sheds, plantations and many other places that needs a roof, with the purpose of taking advantage of the sunlight, also saving the electric energy by making people aware of a more sustainable and renewable country. It is worth mentioning that in case of rain-sensitive plantations with the mobile cover, it will not be necessary to move to totally enclosed sheds, but in sheds using a structure such as that of the moving roof

Extending the Input Voltage Range of Solar PV Inverters with Supercapacitor Energy Circulation

Cleaner and greener energy sources have proliferated on a worldwide basis, creating distributed energy systems. Given the unreliable nature of the renewable sources such as solar and wind, they are traditionally based on inverters interfaced with legacy AC grid systems. While efficiency, output waveform quality and other technical specifications of inverters keep improving gradually, only limited attention is given to widening the input range of inverters. This paper presents a new supercapacitor assisted (SCA) technique to widen the input range of an inverter without modifying the inverter itself. Developing a prototype version of a 24 V DC input capable supercapacitor-assisted wide input (SCASWI) inverter using a supercapacitor circulation front end and a commercial 12 V DC line frequency inverter is detailed in the article, explaining how the SCASWI inverter technique doubles the input voltage while maintaining the useful characteristics of the commercial inverter. The new technique has the added advantage of DC-UPS capability based on a long-life supercapacitor module.