Ziółkowski, Eugeniusz
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Item type:Article, Access status: Open Access , An Analysis of Transient States in the Power Supply System of a Selected Industrial Robot(AGH University Press, 2025) Nowocień, Sebastian; Ziółkowski, EugeniuszIndustrial robots are controlled by dedicated controllers powered by a single-phase or three-phase power supply system. The main power parameters characterizing the power supply system of these robots are: nominal supply voltage (1-phase: 100–120 V, 200–240 V or 3-phase 200–575 V AC), frequency of the supply voltage (50 Hz or 60 Hz), the nominal power consumed by industrial robot. The dynamics of power consumption in the power supply system of the controlled robot can be studied by recording instan¬taneous values of voltages and currents in each phase of the power grid. In this article, results are presented for the measurements of mentioned instantaneous values for a chosen single-phase powered robot, taken by specialized recorder. The measurements obtained from the recorder allows the calculation of numerically various energetic values in the power supply system of the robot: peak-peak values, RMS values, coefficients of deformation and values of harmonic amplitudes (FFT), values of active, reactive and apparent power and the power coefficient (tg?). The analysis of the waveforms of the instantaneous values of voltage and current allows the determination of the occurrence of transient states during the work of robot axes and characterizing its duration and the range of value changes. The analyses conducted can be used to properly design the protection systems of the power supply system, the eventual selection of filters for higher harmonics, and to determine the effective power consumption of the studied robot. The analyses of the transient states which occurred during the work of the studied robot in this publication significantly expand the knowledge about the dynamics of power consumption and its possible impact on the quality of electricity in the power supply grid.Item type:Article, Access status: Open Access , An IT system for the remote burden optimization of foundry furnaces(AGH University of Science and Technology Press, 2021) Ziółkowski, EugeniuszThe burden calculations for foundry furnaces are one of the most important steps in preparing the production of liquid casting alloys. These calculations, due to the usually large number of input materials and chemical elements, are realized by numerical methods. These methods are implemented in some spreadsheets, universal mathematical programs or in specialized programs for foundry engineering. The paper describes a computerized system for remote calculations of optimal burden. The technological, economic, and organizational features of implementing IT system have been presented, also taking into account its safety of use.Item type:Book Chapter, Access status: Open Access , Wybrane sensory w mikroprocesorowym monitorowaniu parametrów środowiskowych powietrza(Wydawnictwa AGH, 2024) Faber, Jakub; Ziółkowski, EugeniuszThis article discusses the issue of air quality in the workplace and its impact on employees – their health, well-being, and productivity. It debates commonly encountered environmental parameters affecting air quality, sources of their formation, and the negative effects of exposure to them. Based on popular air pollutants found in the foundry industry, sensors and a microcontroller with satisfactory parameters were selected to construct a prototype microprocessor system for measuring environmental parameters. The system was assembled and appropriate programming actions were taken to finalize the adopted assumptions. Methods for reading parameters were presented, current measurements were conducted, and further possibilities for system modification were considered.Item type:Article, Access status: Open Access , Power consumption comparison of model vibratory unit in power supply system with and without inverter for frequency setting of 50 Hz(AGH University of Science and Technology Press, 2017) Ziółkowski, Eugeniusz; Skrzyński, MateuszThe article presents the instantaneous voltage and current values recorded in the power-supply system of a vibratory unit directly from the power grid or through an inverter for a frequency setting of 50 Hz. The obtained measurement data was used to perform digital signal processing algorithms, calculations of effective voltages, currents, power (active, reactive, and apparent), and power factor tgφ. The results of the calculations were used to compare the two power systems examined.