Chowdhury & Georgakis, P.C.
Methods and apparatuses for elimination of torque pulsation in doubly fed induction generators using the field reconstruction method
Methods and apparatuses for substantially eliminating torque pulsation in a doubly fed induction machine are disclosed. An example method comprises: measuring a stator current of the doubly fed induction machine, measuring a rotor current of the doubly fed induction machine, calculating a total magnetic flux density in an airgap of the doubly fed induction machine, calculating a tangential force density, calculating an electromagnetic torque, repeating the calculation of the electromagnetic torque over one electrical cycle to estimate a torque pulsation, determining a new rotor current that substantially eliminates the torque pulsation by referencing a set of optimal rotor currents in a look-up table, and changing the rotor current in response to the determination. Other embodiments are described and claimed.
Board of Regents, The University of Texas System
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Babak Morgan M. Wei Wei-Jen
Fahimi Kiani Wang Lee