FOUR DECIMAL PLACES
THANK YOU IN ADVANCE
- Please Solve The Question Below Accordingly Give Answers In Four Decimal Places Thank You In Advance 1 (72.44 KiB) Viewed 18 times
PLEASE SOLVE THE QUESTION BELOW ACCORDINGLY, GIVE ANSWERS IN FOUR DECIMAL PLACES THANK YOU IN ADVANCE
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PLEASE SOLVE THE QUESTION BELOW ACCORDINGLY, GIVE ANSWERS IN FOUR DECIMAL PLACES THANK YOU IN ADVANCE
PLEASE SOLVE THE QUESTION BELOW ACCORDINGLY, GIVE ANSWERS IN
FOUR DECIMAL PLACES
THANK YOU IN ADVANCE
A 400 V, 50 Hz, 6-pole, 940 rpm, star connected induction motor has the following parameters: stator and rotor resistances are 1.35 2 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. a) The motor operates at 35 Hz. Calculate the ratio of the maximum torque at this frequency with respect to the one at rated frequency, for both motoring and generation. For the motoring case the ratio is: For the generation case the ratio is: b) For the same 35 Hz operating frequency, calculate ratio of the starting current at this frequency with respect to the starting current at rated frequency. Starting current ratio is: c) Assume that the voltage boost of 50 V (phase voltage) is used. Calculate new value of the phase voltage that would be applied in this case for the operating frequency of 35 Hz. Repeat part b) with this new voltage applied. Phase voltage: V Starting current ratio:
FOUR DECIMAL PLACES
THANK YOU IN ADVANCE
A 400 V, 50 Hz, 6-pole, 940 rpm, star connected induction motor has the following parameters: stator and rotor resistances are 1.35 2 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. a) The motor operates at 35 Hz. Calculate the ratio of the maximum torque at this frequency with respect to the one at rated frequency, for both motoring and generation. For the motoring case the ratio is: For the generation case the ratio is: b) For the same 35 Hz operating frequency, calculate ratio of the starting current at this frequency with respect to the starting current at rated frequency. Starting current ratio is: c) Assume that the voltage boost of 50 V (phase voltage) is used. Calculate new value of the phase voltage that would be applied in this case for the operating frequency of 35 Hz. Repeat part b) with this new voltage applied. Phase voltage: V Starting current ratio:
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