Indirect Field Orientation Control of Induction Machine with Detuning Effect
Engineering and Technology Journal,
2008, Volume 26, Issue 2, Pages 265-277
AbstractField orientation control (FOC) methods of an induction machine achieve
decoupled torque and flux dynamics leading to independent control of torque and
flux as for separately excited DC motor, but they are sensitive to motor parameter
variations. The has present work selects the indirect field orientation control
(IFOC) as an effective method for eliminating the coupling effect. The results
show how well the drive performance has been improved by this control strategy.
However, to which extent the control strategy can perform the decoupling relies on
the accuracy of the slip frequency calculation. Unfortunately, the slip frequency
depends on the rotor time constant that varies continuously according to the
operational conditions and, then, the coupling effect may again arise.
This paper investigates the improvement in the performance of the
induction machine dynamics as the IFOC technique is utilized, also, it
investigatesthe degradation in dynamic performance when the rotor resistance is
deviated from its nominal value.
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