Sökning: "Windings"
Visar resultat 16 - 20 av 60 avhandlingar innehållade ordet Windings.
16. On Fault Detection, Diagnosis and Monitoring for Induction Motors
Sammanfattning : 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. LÄS MER
17. Simulation and Design of a Radial-Radial Four-Quadrant Transducer for Hybrid Electric Vehicles
Sammanfattning : This report is my licentiate thesis at the Royal Instituteof Technology, (KTH) in Stockholm. The work was done at thedepartment of Electrical Engineering, division of ElectricalMachines and Power Electronic.An internal combustion engine (ICE) in a conventionalvehicle operates rarely at optimum efficiency. LÄS MER
18. Electromagnetic Modelling of Power Transformers with DC Magnetization
Sammanfattning : DC currents that flow through the ground can be injected to the star windings of power transformers from their grounded neutral points and close their path with transmission lines. The geomagnetically induced currents (GICs) and AC/DC convertors of high voltage direct current (HVDC) systems are the sources of such DC currents. LÄS MER
19. Analysis and Control Aspects of Brushless Induction Machines with Rotating Power Electronic Converters
Sammanfattning : This thesis deals with the steady-state, dynamic and control aspects of new type of brushless configuration of a doubly-fed induction machine in which the slip rings and carbon brushes are replaced by rotating power electronics and a rotating exciter. The aim is to study the stability of this novel configuration of the generator under mechanical and grid disturbances for wind power applications. LÄS MER
20. A lumped element transformer model including core losses and winding impedances
Sammanfattning : 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. LÄS MER