Browsing NTNU Open by Author "Evestedt, Fredrik"
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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 ...