Search for dissertations about: "Torque"

Showing result 1 - 5 of 272 swedish dissertations containing the word Torque.

  1. 1. Torque and Angle Controlled Tightening of Bolted Joints

    University dissertation from Chalmers University of Technology

    Author : Göran Toth; Chalmers tekniska högskola.; Chalmers University of Technology.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Farkostteknik; Vehicle engineering; Bolted screwed joints; clevis; torque controlled tightening; torque and angle controlled tightening; turn-of-nut method; yield; snug torque; Monte-Carlo simulations; Taylor’s series expansions; plastic spring constant; plastic deformation; torque; final torque; preload; twisting; momentary elongation; permanent elongation; deformation factor; deformation parameters; spring characteristic; hexalobular; Torx; bearing surface pressure; friction diameter;

    Abstract : Reduced weight and fuel consumption, improved reliability and engine performance are the main requirements in the automotive industry of today. These requirements demand robust and optimized bolted joints, where a high amount of preload obtained by effective utilisation of the bolt is essential. READ MORE

  2. 2. Torque and angle controlled tightening over the yield point of a screw

    University dissertation from Chalmers University of Technology

    Author : Göran Toth; Chalmers tekniska högskola.; Chalmers University of Technology.; [2002]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bolted screwed joints; clevis; torque controlled tightening; torque and angle controlled tightening; turn-of-nut method; yield; snug torque; Monte-Carlo simulations; Taylor s series expansions; extreme-value method; plastic spring constant of the screw; plastic deformation; final torque; final preload; elastic angle; momentary elongation factor; permanent elongation factor;

    Abstract : .... READ MORE

  3. 3. Synchronous Reluctance Machine (SynRM) in Variable Speed Drives (VSD) Applications

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Reza Rajabi Moghaddam; KTH.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Synchronous Reluctance Machine SynRM ; Torque; Torque Ripple; Design; Optimization; FEM; Control; Standard Size; Measurement; Performance Comparison; Induction Machine IM ; Interior Permanent Magnet Machine IPM ; Variable Speed Drive VSD ; General Purpose GP ; Field Oriented Control FOC ; Direct Torque Control DTC ; Heat Run; Test; Thermal; Operation Diagram; Circle Diagram; TECHNOLOGY Electrical engineering; electronics and photonics Electrical engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektroteknik;

    Abstract : This thesis is comprehensively dedicated to the theoretical and experimental reevaluation of the Synchronous Reluctance Machine (SynRM). A simple approach to derive the SynRM main characteristics and behavior is followed. An introduction to an evaluation of the different control strategies in is given. READ MORE

  4. 4. Hydropower generator and power system interaction

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Johan Bladh; Uppsala universitet.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Amortisseur windings; applied voltage test; automatic voltage regulators; damper windings; damping torque; empirical modelling; equivalent circuits; excitation control; finite element method; hydropower generators; power system restoration; power system stability; synchronous machines; self excitation; shaft torque amplification; short circuit test; single machine infinite bus; slip test; standstill frequency response test; subsynchronous oscillations; synchronising torque; synchronous generators; torsional interaction.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : After decades of routine operation, the hydropower industry faces new challenges. Large-scale integration of other renewable sources of generation in the power system accentuates the role of hydropower as a regulating resource. READ MORE

  5. 5. Fabrication and Characterization of Nanocontact Spin-Torque Oscillators

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Sohrab Redjai Sani; KTH.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spin-torque oscillators; phase locking; spin wave; giant magnetoresistance; spin transfer torque; thin films.;

    Abstract : The manufacturing of nanocontact-based spin-torque oscillators (NC-STOs)has opened the door for spintronic devices to play a part as active microwaveelements. The NC-STO has the capability of converting a direct current intoa microwave signal, and vice versa, by utilizing the spin transfer torque (STT)in ferromagnetic multilayer systems. READ MORE