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1
Content available Analiza procesów iskrzenia w maszynach komutatorowych prądu stałego w oparciu o matematyczne wskaźniki iskrzenia
100%
Zieliński W.
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tom Nr 77
177-180
EN
The paper presents mathematical apparatus in the form of indicators that makes possible to describe sparking processes forming at the moving contact of brush bridges with commutator bars at the 'oncoming' and 'leaving' sides in direct-current commutating machines. The formulated mathematical dependences make possible to observe and analyze sparking distribution of each single commutator bar in the course of a whole measuring cycle or during an arbitrarily selected revolution or a few successive revolutions of the commutator within the measuring cycle. Boundary values of the proposed sparking indicators have also been given.
2
Content available Diagnostyka procesów iskrzeniowych komutatorowych maszyn prądu stałego w czasie rzeczywistym
100%
Zieliński W.
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tom Nr 77
181-184
EN
A new method of commutation diagnosing based on the investigation of processes that appear at the junction between a brush and a commutator, as well as the results of the investigation are presented in the present article. Additional sparking was observed when disordering the commutation poles. Simultaneously, based on the author's original method, real-time research was conducted with the use of a brushes' sparking analyser connected to a computer system. The numeric research results were presented in the form of two cases' characteristics, the former being the case of non-sparking commutation area immaterially exceeded, the latter- of so-called commutation fire on the commutator's circuit formed by the sparks.
3
Content available Koncepcja systemu ekspertowego monitorowania i diagnostyki elektrycznych maszyn komutatorowych prądu stałego
100%
Zieliński W.
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tom Nr 80
189-191
EN
The paper presents a concept of realization of an expert system for monitoring and diagnostics of electric direct current commutator machines. A perceptron regulator of the current of commutation poles is sometimes incapable of eliminating or reducing the sparking of brushes. This may be due to mechanical or other additional factors, which were not taken into consideration in the process of instruction of the artificial neural network ANN described in the previous paper. That is why the application of a damage detector will allow to control states of emergency or machine failures and to inform the system operator or shut down.
4
Content available Zastosowanie sztucznych sieci neuronowych do redukcji stopnia iskrzenia w elektrycznych maszynach komutatorowych prądu stałego
100%
Zieliński W.
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tom Nr 80
185-187
EN
The paper presents a possible application of the capabilities of methods and techniques of ANN artificial intelligence for diagnostics of sparking processes in electric direct current commutator machines. Hitherto applied methods of diagnostics, usually based on the visual observation of sparking, depend on the expert's knowledge and experience. The expert interprets current data obtained from observation. The drawback of this approach lies in its dependence on the expert's knowledge and experience, which makes the data difficult to use for further processing. That is why, apart from improving methods, it is necessary to find a way to objectify the sparking processes in the detection and assessment of damage as well as reduction of the level of sparking of brushes.
5
Baza danych ośrodków nowoczesnych technologii.
51%
Trznadel M. , Kubiak G. , Zieliński W.
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tom nr 6
12-18
6
Content available remote Synteza nowych czwartorzędowych soli amoniowych do organofilizacji nanokompozytowych napełniaczy polimerowych
51%
Zieliński W. , Piasecki A. , Pigłowski J.
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tom Vol. 60, nr 7-8
VIII-VIII
7
Content available Wykorzystanie metody pośredniej do określania momentu krytycznego silnika indukcyjnego
51%
Zieliński W. G. , Zielińska M. J. , Zieliński W.
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tom Nr 80
151-154
EN
Pull-out torque and the corresponding pull-out slip of induction motors is determined, with a fair degree of accuracy, by measurements in the short-circuit and idle-running states. This refers to motors without the skin effect in the cage bar or those in which the phenomenon has been omitted. The paper compares analytical methods for determining pull-out torque based on the method of equivalent graphs and a simplified Kloss formula. The analysis was carried out for two induction motors: squirrel cage and slip ring. Pull-out slip and torque diagrams were used. An advantage of this method is the fact that determination of pull-out torque does not require the knowledge of pull-out slip.
8
Content available “Interactive Power Devices for Efficiency in Automotive with Increased Reliability and Safety” – the European Project Concerning the Main Automotive and Transport Application Domains
26%
Kadlec J. , Kuchta R. , Novotny R. , Hajduga A. , Sekrecki M. , Roszczyk P. , Dybowski J. , Kalbarczyk J. , Zieliński W. , Bańbura P. , Burliński R.
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tom Vol. 69, no. 3
31--64
EN
The overall objective of the IDEAS project is to develop advanced packaging for power supply components and new generation memory systems applicable to Electric and ICE propelled vehicles, with paying attention to considering also the aspects that have not been addressed yet in the running ENIAC and ARTEMIS Automotive projects. A major challenge related to electronic devices in the automotive applications is the reliability of power supply systems which must be capable to assure the functionality of subsystems in all operating conditions, inclusive of ageing. The control systems, which rely on multicore microcontrollers and complex software architectures, require increasingly stringent constraints from the memory devices which need to be designed for very high bandwidth, speed and reliability. In the following thesis, a few aspects of the IDEAS project will be presented: a review of important factors that affect the reliability and life-cycle endurance of NAND flash memories, multispeed gear application in electric drives and its influence on the energy efficiency. The problem of electromagnetic compatibility of electronic devices will also be dealt with in the paper
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