A 400 V, 50 Hz, 6-pole, 940 rpm, star connected induction motor has the following parameters: stator and rotor resistanc

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A 400 V 50 Hz 6 Pole 940 Rpm Star Connected Induction Motor Has The Following Parameters Stator And Rotor Resistanc 1 (58.25 KiB) Viewed 42 times

A 400 V, 50 Hz, 6-pole, 940 rpm, star connected induction motor has the following parameters: stator and rotor resistances are 1.25 each, and stator and rotor leakage reactance are 2 each (magnetising reactance can be neglected). The motor is controlled by simultaneous stator voltage and frequency variation. Voltage boost is not used and the motor is controlled using V/f = constant law. The motor is supplied from a three-phase voltage source inverter c) Assume that the voltage boost of 25 V (phase voltage) is used. Calculate new value of the phase voltage that would be applied in this case for the operating frequency of 25 Hz. Repeat part b) with this new voltage applied. [6 marks] Phase voltage: Number V Starting current ratio: Number