Search for dissertations about: "Free induction"

Showing result 1 - 5 of 1136 swedish dissertations containing the words Free induction.

  1. 1. Induction bearings

    University dissertation from Stockholm : Elektrotekniska system

    Author : Torbjörn A. Lembke; KTH.; [2003]
    Keywords : ;

    Abstract : A self stabilizing homopolar induction bearing withintegrated touch down bearings has been developed forhigh-speed applications like flywheels, small gas turbines andcompact vacuum cleaners.Stability is achieved without any control electronics thanksto stabilizing eddy currents induced by permanent magnets. READ MORE

  2. 2. Modeling of induction stirred ladles

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Mayur Pal; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; induction ladle; electromagnetic; Lorentz forces; magnetic stirrer; magnetic diffusion; Navier-Stokes; FEM;

    Abstract : Over the years numerous computational fluid dynamics models have been developed in order to study the fluid flow in gas and induction stirred ladles. These models are used to gain insight in the industrial processes used in ladle treatment of steel. A unified model of an induction stirred Ladle in two and three dimensions is presented. READ MORE

  3. 3. Magnetic Fields and Induced Power in the Induction Heating of Aluminium Billets

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Mark William Kennedy; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Induction; heating; billets; coils; magnetic fields;

    Abstract : Induction heating is a common industrial process used for the reheating of billets before extrusion or forging. In this work the influence of the coil and work piece geometry, the effect of the electrical properties of the work piece, and the coil current and frequency, on the magnetic flux density and resulting work piece heating rates were studied. READ MORE

  4. 4. On Fault Detection, Diagnosis and Monitoring for Induction Motors

    University dissertation from Luleå tekniska universitet

    Author : Mohammed Obaid Mustafa; Luleå tekniska universitet.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Model based fault detection and diagnosis; Model free fault detection; Set Membership Identification SMI ; Uncertainty Bounds Violation Method; Model based Support Vector Classification; Linear and Nonlinear Classification; Minimum Volume Ellipsoid method; Broken Rotor Bars; Faults of Induction Motors; Three phase induction motor; Information technology - Automatic control; Informationsteknik - Reglerteknik; Reglerteknik; Control Engineering;

    Abstract : In this thesis, multiple methods and different approaches have been established and evaluated successfully, in order to detect and diagnose the faults of induction motors (IMs). The aim of this thesis is to present novel fault detection and isolation methods for the case of induction machines that would have the merit to be implemented online and being characterized by specific novel capabilities, when compared with the existing techniques. READ MORE

  5. 5. Thermal Modelling of Small Cage Induction Motors

    University dissertation from Chalmers University of Technology

    Author : Gunnar Kylander; Chalmers tekniska högskola.; Chalmers University of Technology.; [1995]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; thermal network; thermal model; induction motor; TEFC; losses;

    Abstract : The loadability of electric machines is above all determined by temperature limits. In this work, thermal network models, suitable for totally enclosed fan cooled (TEFC) induction motors, are used to predict the machine temperatures. READ MORE