Search for dissertations about: "a. winding"

Showing result 1 - 5 of 92 swedish dissertations containing the words a. winding.

  2. 1. Localization, supersymmetric gauge theories and toric geometry

    Author : Jacob Winding; Maxim Zabzine; Sara Pasquetti; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Supersymmetry; gauge theory; localization; toric geometry; Theoretical Physics; Teoretisk fysik;

    Abstract : Gauge theories is one of the most pervasive and important subject of modern theoretical physics, and there are still many things about them we do not understand. In particular dealing with strongly coupled theories where normal perturbative techniques do not apply is a fundamental open problem. READ MORE

  4. 2. The long and winding road : A life course approach to retirement behaviour

    Author : Johan Örestig; Mikael Stattin; Björn Halleröd; Daniel Larsson; Staffan Marklund; Umeå universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Retirement Ageing Life course Well-being Work; sociologi; Sociology;

    Abstract : Background: This thesis explores the retirement behaviour of older people approaching retirement decisions. The research questions in focus deal with the attitudes toward work, the retirement preferences and the subjective well-being of the "youngest old", i.e. people aged 55–64. READ MORE

  5. 3. Run-Up Transient Analysis for Salient Pole Wound Field Synchronous Motors : Field winding and power electronics implications for a smoother and cooler asynchronous start

    Author : Roberto Felicetti; Urban Lundin; Andreas Binder; Uppsala universitet; []
    Keywords : apparent resistance; cable modeling; current control; transmission line model; eddy currents; field winding; frequency analysis response; Fourier Transform; impedance mismatch; main inductance; overvoltage; parasitic capacitance; partial discharge; quality factor; ringing; slew rate; stray inductance; voltage gradient; winding resonance frequency; asynchronous start; run-up; torque ripple; reluctance torque; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Abstract : Salient Pole Wound Field Synchronous Machines have better efficiency at full load than asynchronous machines of the same capability. Moreover, where asynchronous machines need inherently to draw a magnetizing current from the grid, Salient Pole Wound Field Synchronous Machines can work efficiently at unity power factor. READ MORE

  6. 4. A lumped element transformer model including core losses and winding impedances

    Author : David Ribbenfjärd; Göran Engdahl; Arvid Broddefalk; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; power transformer; hysteresis; dynamic hysteresis; eddy currents; excess eddy currents; leakage flux; winding model; core model; magnetic measurements; magnetic materials; Electrical engineering; Elektroteknik;

    Abstract : In order to design a power transformer it is important to understand its internal electromagnetic behaviour. That can be obtained by measurements on physical transformers, analytical expressions and computer simulations. READ MORE

  7. 5. A walk into the digital world : a long and winding road

    Author : Kent Fridell; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Radiology departments are changing rapidly due to the implementation of digital image management and PACS (Picture Archiving and Communication Systems). When new information and communication technologies are implemented, there are organizational effects. READ MORE