Sökning: "damper winding"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden damper winding.
1. Measurement and modelling of unbalanced magnetic pull in hydropower generators
Sammanfattning : 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. LÄS MER
2. Electromagnetic Analysis of Hydroelectric Generators
Sammanfattning : Hydropower maintains its position as the most important source of renewable electric energy in the world. The efficiency of large hydropower plants is unsurpassed, and after more than hundred years of development, the technology is mature and highly reliable. LÄS MER
3. Hydropower generator and power system interaction
Sammanfattning : 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. LÄS MER
4. An experimental generator test setup for hydropower research and model verification
Sammanfattning : This licentiate thesis describes the design and construction of a synchronous generator test setup. Some initial measurements are also presented. A twelve pole synchronous generator has been built from a synchronous motor. LÄS MER
5. Improving the functionality of synchronous machines using power electronics
Sammanfattning : With the advent of modern power electronics there is reason to explore what can be achieved when it is applied to a mature technology like synchronous machines. In this text several concepts will be presented on how it is possible to control forces and how to get better performance out of synchronous machines by using power electronics. LÄS MER