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Assessment of the design of the new solution sliding contact in electrical machines
Záhejský, Petr ; Mach, Martin (referee) ; Veselka, František (advisor)
The thesis is devoted to assessing the concept of a new solution to the sliding contact in electrical machines. The work is focused mainly on the issue of collector engines, which are almost exclusively used in electric hand tools. Much of the work is devoted to angle grinders, which are usually used in extreme conditions and demands for seamless operation are enormous. In order partial insight into the problems in the introduction are studied phenomena acting on the sliding contact, wear and durability. Then further materials and diagnostic methods for increasing the transfer efficiency brush - commutator brush - ring. The following sections of this thesis is also considered a proposal innovated brush along with the practical verification and evaluation of the suitability of the use of innovative sliding contact.
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Problems revisions electric machine with a slip device, including an additional device
Ščepka, Ondrej ; Hájek, Vítězslav (referee) ; Veselka, František (advisor)
This Bachelor's thesis describes an issues of an revisions on electric engine equipped with brush. Electric engines with brushing are described in the first part. In the second one is focused on the introduction with necessary standards for performing of revisions of the electric equipment and on the clarification of terms used during the revisions of the electric equipment. The work continues with more detailed description of brushing contact in the electric engine and with the description of its parts. In the next part I have become more familiar with the electric engine that will be inspected. The final part of thesis contains sequence of measurements. I registered and handled recorded measured values mandatory for the issuing of revision report.
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Design of a measuring device for the study of sliding contact
Havliš, Petr ; Hájek, Vítězslav (referee) ; Veselka, František (advisor)
Subject master´s thesis is design of a measuring device for the study of sliding contact. It including description sliding contact, its importance and application possibilities. Specification of examination possibilities of sliding contact, indicate the possibilities of evaluating the measured results. Design a stationary measuring device for long-term tests of the sliding contact and verify its the basic system concept. Master´s thesis including too elektronic make graphes with courses quantity on real machine.
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INNOVATION ANGLE GRINDER
Záhejský, Petr ; Janda, Marcel (referee) ; Veselka, František (advisor)
This thesis deals with the innovation of angle grinder and with upgrades of operating parameters, particularly the sliding contact. We count the angle grinders among electric hand tools, which are usually used in hard conditions. In the first time the non-functional examples of angle grinders were studied and their defects and the samples of dust were analysed. The aim of the other parts of this thesis was to measure the basic parameters of angle grinders, mainly the behavior of the comutator lamination. The following part is focused on application of teflon into the sliding contact, summarizes the behavior of the sliding contact with the presence of teflon, and describes the basic properties of teflon. The conclusion describes the practical application of teflon on the sliding contact, which is supported by long-term tests.
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Sliding contact in electrical machine
Bernard, Ivo ; Skalka, Miroslav (referee) ; Veselka, František (advisor)
The work deals with the sliding contact of electrical machines. The work is focused on individual components of sliding contact and the evaluation qualitative criterions of certain components of sliding contact. In the final section is presented a comparative method that has been designed for large machines. In this work we used this method on a small machine.
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Automotive Electric Motors Analysis and Innovation
Špaček, Ladislav ; Grmela, Petr (referee) ; Hájek, Vítězslav (advisor)
Direct current motors and stepping motors are very often used for electric drives in cars. The most frequent representatives of direct current motors are electric starter and wind- screen wiper motor. Stepping motors are very often used for electric regulating of outsides driving mirrors and seats. This study is focused on innovation and DC permanent magnet motor. The disadvanage of direct current motors is so called „sliding contact“. A possible compensation of direct current motor are EC (electronically commutator) motors that do not need sliding contact for their work.
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Problems revisions electric machine with a slip device, including an additional device
Ščepka, Ondrej ; Hájek, Vítězslav (referee) ; Veselka, František (advisor)
This Bachelor's thesis describes an issues of an revisions on electric engine equipped with brush. Electric engines with brushing are described in the first part. In the second one is focused on the introduction with necessary standards for performing of revisions of the electric equipment and on the clarification of terms used during the revisions of the electric equipment. The work continues with more detailed description of brushing contact in the electric engine and with the description of its parts. In the next part I have become more familiar with the electric engine that will be inspected. The final part of thesis contains sequence of measurements. I registered and handled recorded measured values mandatory for the issuing of revision report.
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