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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Analýza a inovace elektrických motorků pro automobily / Automotive Electric Motors Analysis and Innovation

Špaček, Ladislav January 2011 (has links)
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.
12

Analýza a inovace elektrických motorků pro automobily / Automotive Electric Motors Analysis and Innovation

Vala, Tomáš January 2012 (has links)
Electric drives used in automotive industry are often based on standard DC motor as it is widely recognised as mature and reliable technology. The most common applications of DC motors in automotive industry are starters and wind screen wiper motors. Aim of this thesis is to provide design overview of typical automotive DC motor therefore main parts and features of the machine will be described in detail. Main disadvantage of DC motor is „sliding contact“ between commutator and carbon brushes which introduces source of electromagnetic disturbance and requires regular maintenance. Within this project different aspects of DC motor design and innovation are expected to be tackled including examples of loss calculation.
13

Zvýšení produktivity a kvality vybraných vyráběných dílů / On the increase of productivity and quality of selected manufactured parts

Siclon, Léonard January 2011 (has links)
This document is about the work conducted during four months in the company Poclain Hydraulics. The aim was to improve the productivity of the turning operation on the cams MK04, in a factory environment but with the support of a laboratory. Was also in mind to improve the quality of the part and diminish or eliminate the unbroken chips. In that purpose the trajectories have been analyzed and modified, the cutting conditions studied and adapted, some tool changed, etc. The final result was an improvement of productivity to 140%, an amelioration of the chip breaking and of the part’s quality, leading to significant savings on the process.
14

Analýza a inovace elektrických motorků pro automobily / Automotive Electric Motors Analysis and Innovation

Nejedlý, Vladislav January 2010 (has links)
In this thesis analysis and inovation of electric machines for cars is discused. There are described principles of basics DC and AC electric machines. In detail this thesis deals with small electric machines used in cars. At least, electro motor for wiper is investigated and possibilities of its inovation in different ways are also mantioned.

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