The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The development of electric vehicles (EV) necessitates the search for new solutions for configuring powertrain systems to increase reliability and efficiency. The modularity of power supplies, converters, and electrical machines is one such solution. Among modular electric machines, dual three-phase (DTP) motors are the most common in high-power drives. To simplify low and medium power drives for...
This paper raises the problem of regulatory limitation in port-controlled Hamiltonian energy-shaping control system (PCH ESCS). For this solution, it is proposed to use regulatory actions on directly uncontrollable loops, which can be formed during synthesis and always are discarded due to impossible implementation, by transmitting these actions through controllable loops in two different ways: first...
This article presents an autonomous wind turbine, in which take place the generation and accumulation of two types of energy — electricity and heat, which are needed in the home of an individual consumer. Such combine heat-power wind turbine except of functionality extensions has simple and effective system for optimal control. Efficient generation of electricity is carrying out by means of a passive...
The article presents a comparison by computer simulation the work of dual-rotor vertical axis wind turbine (VAWT) with three types of mechanical transmissions: rigid with the bevel gearbox, semi-rigid with the differential, and soft gearless with the double rotor synchronous generator with permanent magnets. The results of the study have shown the advantages and disadvantages of dual-rotor VAWTs with...
Automated LabVIEW-controlled setup for precise measurements of refractive indices of crystalline materials is described. Results of the test measurements on selected crystals are discussed.
In the paper the structure of the electromechanical system containing a rolling mill and a roller table is presented. A two-mass system is under consideration. The second type Lagrange's equation is used in order to formulate the equations of the abovementioned drive system including the electrical motor of a rolling mill and the electrical motors of a roller table as well as the mechanical system...
The article presents general dependencies for the design of the load torque of a hot-rolling mill stand with respect to the rolling parameters. For the analysis of the electromechanical system a computer-aided model of an induction asynchronous motor taking into account iron losses has been developed. A simplified version of the mathematical model of rolling for a single mill stand has been assumed...
The task of reducing the energy loss is especially important for alternative electricity generation systems from renewable sources. In electromechanical systems with variable angular speed of permanent-magnet synchronous generator (PMSG), the harmonic components of generator voltages and currents in transient and steady state have impact on energy efficiency. This paper compares the energy performance...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.