Advanced search

Showing result 1 - 5 of 20 swedish dissertations matching the above criteria.

2. 1. Partial discharges detected by stator slot couplers

   Author : Jörgen Blennow; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PD; statistical analysis; attentuation; on-line; SSC; partial discharges; stator slot couplers; frequency spectrum; state estimation; pulse shape; stator winding model; distortion;

   Abstract : .... READ MORE

4. 2. Condition Monitoring of Stator Windings with a Networked Electric Drive

   Author : Giovanni Zanuso; Viktória Fodor; Luca Peretti; Antonio Griffo; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industry 4.0; condition monitoring; multi-drive systems; EtherCAT; CAN; stator interturn faults; stator insulation; accelerated aging.; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Electric drives are widely used in industry, where they are also part of the plant communication architecture. This architecture is challenged by the Industry 4.0 initiative that aims to make the devices in industrial plants more interconnected and with additional functionalities. READ MORE

5. 3. Measurement and modelling of unbalanced magnetic pull in hydropower generators

   Author : Mattias Wallin; Urban Lundin; Antero Arkkio; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Damper winding; eddy currents; field winding short circuit; finite element method; hydropower generator; parallel circuits; rotor eccentricity; salient poles; synchronous generators; synchronous machines; UMP; unbalanced magnetic pull.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Abstract : Hydropower research is often perceived to be an old and exhausted field of study but with ageing equipment and the need for more intermittent operation caused by an increased share of other renewable energy sources new challenges lie ahead.The main focus of this dissertation are the electromagnetic forces resulting from nonuniform air gap flux, whether it be caused by rotor eccentricity or a faulty field winding. READ MORE

6. 4. Robotized Production Methods for Special Electric Machines

   Author : Erik Hultman; Mats Leijon; Jörg Franke; Uppsala universitet; []
   Keywords : Industrial robotics; Assembly automation; Large-scale production; Cable winding; Linear generator; Wave energy converter; Wave power; Engineering education; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Abstract : A research project on renewable energy conversion from ocean waves to electricity was started at the Division of Electricity at Uppsala University (UU) in 2001. The Wave Energy Converter (WEC) unit developed in this project is intended to be used in large offshore WEC farms and has therefore been designed with large-scale production in mind. READ MORE

7. 5. Design, Modelling and Control of Electrical Machines - With Applications to Iron-powder Machines and Acoustic Noise

   Author : David Martinez; Industriell elektroteknik och automation; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; BEM; induction machine; noise prediction; vector control; acoustic noise; HEV; series magnetization; leakage reduction; thermal model; FEM; MEC; claw-poles; SMC; slip-ring-less machine; sound intensity measurements; vibration; Electrical engineering; Elektroteknik;

   Abstract : This thesis consists of two parts, the first dealing with the design of iron-powder synchronous machines, and the second with the analysis and prediction of the acoustic noise in electrical machines. In Part I, a 1.6 kW electrically magnetized claw-pole machine with magnetically conducting end-plates has been analyzed and a prototype tested. READ MORE