Blar i NTNU Open på forfatter "Lundin, Urban"
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Start of a synchronous motor using rotor field polarity inversion and rotor back-emf sensing
Lundin, Urban; Evestedt, Fredrik; Abrahamsson, Johan; Pérez, José; Fregelius, Martin; Nøland, Jonas Kristiansen (Chapter, 2020)Synchronous motors are hard to line start due to torque pulsations at zero rotor speed and low starting torque when started using induced current in a damper squirrel cage. By inverting the rotor pole polarity at appropriate ... -
Time Domain Signature Analysis of Synchronous Generator under Broken Damper Bar Fault
Ehya, Hossein; Nysveen, Arne; Nilssen, Robert; Lundin, Urban (Chapter, 2019)Fault detection of electrical machines can avoid unplanned outage of the electricity generation at a power plant. Research related to a different type of faults in the synchronous generator, the broken damper bar (BDB) ... -
Unified Reduced Model for a Dual Control Scheme of the High-Speed Response Brushless Excitation System of Synchronous Generators
Nøland, Jonas Kristiansen; Alves, Erick Fernando; Pardini, Atila; Lundin, Urban (Journal article; Peer reviewed, 2019)Developments of the high-speed response brushless excitation systems (HSRBESs) are ongoing in the power industry. This is because the transient response of the excitation system (ES) is a key performance indicator for the ...