Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Dariusz Cholewa"'
Autor:
Dariusz Cholewa, Piotr Drozdowski
Publikováno v:
Energies, Vol 17, Iss 4, p 790 (2024)
This paper presents a voltage control system for multiphase squirrel-cage induction generators operating at a high variability of speed and variable load. Field-oriented vector control was used with a change in the sequence of the stator phase curren
Externí odkaz:
https://doaj.org/article/b986d87c68c04a2195403a7536a10186
Autor:
Piotr Drozdowski, Dariusz Cholewa
Publikováno v:
Energies, Vol 14, Iss 21, p 7080 (2021)
The subject of this publication is a method of controlling the DC voltage of a PWM rectifier supplied by a multiphase cage induction generator with the number of stator phases greater than three operating in a wide range of driving speeds. Voltage re
Externí odkaz:
https://doaj.org/article/4d07b937b5bd41a991b26f3bb9695847
Publikováno v:
Energies, Vol 14, Iss 16, p 5160 (2021)
Hybrid hydro energy systems are usually analysed with pumped hydro storage systems, which can facilitate energy accumulation from other sources. Despite the lack of water storage, run-of-the-river hydropower plants are also attractive for hybrid syst
Externí odkaz:
https://doaj.org/article/90520c58127c42739795fa94b963a72f
Publikováno v:
2019 15th Selected Issues of Electrical Engineering and Electronics (WZEE).
Transistors of voltage source inverters are switched without losses when their currents or voltages are close to zero when the transistors are switched. This condition can be fulfilled by means of certain resonant processes, whose durations are compa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::592d2add9b54ddbdea230b1a2000b353
https://doi.org/10.1109/wzee48932.2019.8979969
https://doi.org/10.1109/wzee48932.2019.8979969
Autor:
Dariusz Cholewa, Piotr Drozdowski
Publikováno v:
2019 15th Selected Issues of Electrical Engineering and Electronics (WZEE).
The paper presents tests of fault tolerance of a regulated drive with a multi-phase squirrel-cage induction motor. The drive was controlled using variable frequency with switching the output voltage sequence of the inverter. The damages were mainly c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa3e67a96ad308b71e8c1c8e7d67eacd
https://doi.org/10.1109/wzee48932.2019.8979746
https://doi.org/10.1109/wzee48932.2019.8979746
Publikováno v:
2018 14th Selected Issues of Electrical Engineering and Electronics (WZEE).
Insulated Gate Bipolar Transistors are ones of basic switching elements in voltage source inverters with medium and high power rating. The switching losses in these transistors can be significantly reduced using different methods which allow to switc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::491e1f494e50dcdaba872132e45efcca
https://doi.org/10.1109/wzee.2018.8748960
https://doi.org/10.1109/wzee.2018.8748960
Autor:
Dariusz Cholewa, Piotr Drozdowski
Publikováno v:
2018 14th Selected Issues of Electrical Engineering and Electronics (WZEE).
The subject of the article is a computer model of a multi-phase squirrel cage induction motor with a stator number phases greater than 3. This model is written in the Matlab / Simulink language and is presented graphically in the form of a multi-term
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f13f0d3d2988d5d0e6f45b04fd197e8
https://doi.org/10.1109/wzee.2018.8749007
https://doi.org/10.1109/wzee.2018.8749007
Autor:
Dariusz Cholewa, Piotr Drozdowski
Publikováno v:
2018 International Symposium on Electrical Machines (SME).
The nine-phase induction motor operating at a variable frequency was presented in the paper. The control method was supplemented with the additional possibility based on the supplied voltages sequence switching of the 9-phase supply system made of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40a3e2f97bc98d6d367e93de9b86fb38
https://doi.org/10.1109/isem.2018.8442620
https://doi.org/10.1109/isem.2018.8442620
Publikováno v:
2018 International Symposium on Electrical Machines (SME).
The paper deals with problems concerning cooperation between a cage induction motor with a voltage source inverter which is equipped in a soft switching system. It was assumed that the induction motor operates with a certain vector control method. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f910e72ecbb6b5a5fcf755b1b08ef6ce
https://doi.org/10.1109/isem.2018.8442764
https://doi.org/10.1109/isem.2018.8442764
Publikováno v:
Wiadomosci lekarskie (Warsaw, Poland : 1960). 59(5-6)
The aim of the study were the comparison of a course of delivery and the baby's condition between family delivery and traditional mode of labour, and the analysis of factors influencing the choice for a particular delivery option.retrospective analys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::daad213f05ebee6d68fdf6749c927d63
https://pubmed.ncbi.nlm.nih.gov/17017474
https://pubmed.ncbi.nlm.nih.gov/17017474