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Immediate!! An induction motor has the following parameters. Determine the maximum transient torque that can occur...

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Physics

Immediate!! An induction motor has the following parameters.

Determine the maximum transient torque that can occur when the100 hp motor is plug reversed (sudden reversal of the excitationphase rotation). Assume the machine is running in the steady statewith rated load prior to the plugging and that the load torque isconstant over the interval of interest. Also assume that all threephases disconnect and connect simultaneously and that the timebetween opening and closing can be varied. Compare the simulationresults with an approximate solution using the trapped rotor fluxmodel.

460 V (lin-to-line), 100 HP, 60 Hz, 4-pole, r s =r r =0.0425ohm, L s =L r =23.33 mH, L m =22.57 mH, J=2 kg-m 2 Rated slip: s R=0.0177, rated stator current I R =109.5 A, rated power factor:0.88.

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