Compared analysis of lspm sm and squirrel-cage motor exploitation with variable rotational speed

In this paper, the steady-states operation of a line start permanent magnet synchronous motor (LSPMSM) and a squirrel-cage motor have been compared. The stator of a Sg 100L-4B type, 3 kW induction motor, was used in both structures. The squirrel cage in the rotor of the LSPMSM is made from copper. The influence of the frequency change of the supply voltage on the motor’s efficiency and current as well as the power factor has been examined

Use of cross-compiling in the programming of an intelligent device for measuring electrical quantities

A device for voltage and direct current measurement, built by coupling a Raspberry Pi microcomputer with an Arduino series microcontroller is presented in this paper. The structure of the device is presented and the method of implementing proprietary programs for both devices is described. A touch screen of the device allows the user to decide on the measurement mode (automatic or manual) and on the method of archiving and visualizing the effects of measurements. The application uses the so-called cross-compiling, thanks to which it is possible to effectively couple such different platforms as Raspberry Pi and Arduino

Low-budget intelligent air purifier suitable for small public spaces

W artykule przedstawiono koncepcję oraz zrealizowany, funkcjonalny model fizyczny mobilnego oczyszczacza powietrza przeznaczonego dla niedużych pomieszczeń użyteczności publicznej lub mieszkań. Oczyszczacz jest konstrukcją zwartą, sterowaną mikrokontrolerem serii Arduino UNO. Model wyposażony jest w zestaw sensorów pozwalających określić zawartość zanieczyszczeń typu PM2,5 i PM10. Po przekroczeniu przyjętego, w oprogramowaniu progu, układ automatycznie rozpoczyna proces filtrowania powietrza. Pomiarowi podlegają: zawartość zanieczyszczeń stałych, wilgotność i temperatura powietrza oraz spadek ciśnienia na wbudowanych filtrach. Oczyszczacz pochłania zarówno zanieczyszczenia stałe jak też redukuje zanieczyszczenia lotne organiczne. Układ został wyposażony w ekran informujący użytkownika o parametrach powietrza i stanie zanieczyszczenia filtra typu HEPA.The article presents the concept and implemented, functional physical model of a mobile air purifier for small public spaces or apartments. The purifier is a compact, controlled microcontroller of the Arduino UNO series. The model is equipped with a set of sensors allowing to determine the content of PM2.5 contaminants and PM10. After exceeding the adopted threshold in the software, the system automatically starts the process of air filtering. The following factors are measured: solid contamination content, humidity and air temperature as well as pressure drop on built-in filters. The purifier absorbs both solid pollutants as well as reduces volatile organic pollutants. The system has been quipped with a screen informing the user about air parameters and the state of the HEPA filter contamination