Title
Projektovanje i optimizacija električnih kontakata i termičkih prekidača : doktorska disertacija
Creator
Prijić, Aneta
Copyright date
2007
Object Links
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Autorstvo 3.0 Srbija (CC BY 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
Other responsibilities
mentor
Pešić, Biljana
Academic Expertise
Tehničko-tehnološke nauke
University
Univerzitet u Nišu
Faculty
Elektronski fakultet
Publisher
Niš : [A. Prijić],
Format
PDF/A 150 (listova)
description
"Ova doktorska disertacija je realizovana u okviru projekata 'Istraživanje i razvoj tehnologija proizvodnje električnih kontakata' i 'Razvoj tehnologije proizvodnje termičkih prekidača', finansiranih od strane Ministarstva za nauku i zaštitu životne sredine Republike Srbije"--> list [2]
Umnoženo za odbranu.
Univerzitet u Nišu, Elektronski fakultet., 2007.
Bibliografija: listovi 141-150.
Abstract (en)
This Dissertation deals with the design and optimization of two kinds of metal based switching devices: i) riveted electrical contacts which are studied in the first part, and ii) S-type thermal cutoffs which are considered in the second part.
Theoretical basis of electric contacts' design given in Chapter 1 is employed for contact material selection, proper set of contacts' geometry and dimension values and minimal contact force determination. Contacts of solid and clad types with rounded head are considered within two supporting structures. 3-D simulation of mechanical, electrical and thermal characteristics of selected contacts is steady state regime is performed and obtained results are presented in Chapter 2. Simulations are carried out in coupled domains by direct method. Special emphasis is given on dependencies of operating temperature and maximum equivalent stress in contacts under various working conditions. On the basis of the obtained results, optimization of riveted electric contacts is realized by appropriate selection of contact material, determination of geometry and dimensions of contacts and definition of rated current values. Optimization was conducted by functional, economic, ecological and reliability points of view. Possibilities of mounting the contacts in specific switching devices with predefined rated currents, as well as number of switching cycles before the failure are ore outlined. Analyzed dependencies and optimization results are described in detail in Chapter 3.
Authors Key words
Prekidači
Subject
621
Type
Elektronska teza
Abstract (en)
This Dissertation deals with the design and optimization of two kinds of metal based switching devices: i) riveted electrical contacts which are studied in the first part, and ii) S-type thermal cutoffs which are considered in the second part.
Theoretical basis of electric contacts' design given in Chapter 1 is employed for contact material selection, proper set of contacts' geometry and dimension values and minimal contact force determination. Contacts of solid and clad types with rounded head are considered within two supporting structures. 3-D simulation of mechanical, electrical and thermal characteristics of selected contacts is steady state regime is performed and obtained results are presented in Chapter 2. Simulations are carried out in coupled domains by direct method. Special emphasis is given on dependencies of operating temperature and maximum equivalent stress in contacts under various working conditions. On the basis of the obtained results, optimization of riveted electric contacts is realized by appropriate selection of contact material, determination of geometry and dimensions of contacts and definition of rated current values. Optimization was conducted by functional, economic, ecological and reliability points of view. Possibilities of mounting the contacts in specific switching devices with predefined rated currents, as well as number of switching cycles before the failure are ore outlined. Analyzed dependencies and optimization results are described in detail in Chapter 3.
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