Sökning: "winding"
Visar resultat 1 - 5 av 104 avhandlingar innehållade ordet winding.
1. Localization, supersymmetric gauge theories and toric geometry
Sammanfattning : 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. LÄS MER
2. Voltage Transients in the Field Winding of Salient Pole Wound Synchronous Machines : Implications from fast switching power electronics
Sammanfattning : Wound Field Synchronous Generators provide more than 95% of the electricity need worldwide. Their primacy in electricity production is due to ease of voltage regulation, performed by simply adjusting the direct current intensity in their rotor winding. LÄS MER
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
Sammanfattning : 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. LÄS MER
4. Partial Discharges in Large Rotating Machines - Continuous On-line Monitoring and Localisation, Based on a New Developed Technique (InTech)
Sammanfattning : Partial discharges (PD) that originate from dielectrically defective parts of the insulation system result in its degradation, which may ultimately lead to a failure of high voltage apparatus. This has resulted in development of numerous PD measuring techniques. One of the most widespread applications of PD measurement is in rotating machines. LÄS MER
5. Den raka och den krokiga vägen : om genus, ingenjörer och teknikkarriärer
Sammanfattning : Abstract The purpose of this doctoral thesis is to shed light on, explain, and problematize women’s and men’s paths both to and within the profession of engineer. Computer and mechanical engineers are in focus and the overarching issues that this thesis attempts to answer are: How can women’s and men’s paths to the profession of engineer be explained and what has governed/motivated their choice of education? How do women’s and men’s career patterns look in professional life, and how can these patterns be explained? This study is based on a social-constructivistic approach, entailing a focus on how choices of education and profession have been negotiated through social and cultural practices, norms, and values. LÄS MER