i)The heating and cooling time constants of an electric motor are 100 and 150 minutes respectively....

 

Transcribed Image Text:

i)The heating and cooling time constants of an electric motor are 100 and 150 minutes respectively. The rating of the motor is 125kW. What load motor can deliver for 20 minutes if this is followed by a shutdown period long enough for it to cool? Assume a = 0.4. ii) What do you mean by steady state stability of electric drive? Explain it. [3] [3] i)The heating and cooling time constants of an electric motor are 100 and 150 minutes respectively. The rating of the motor is 125kW. What load motor can deliver for 20 minutes if this is followed by a shutdown period long enough for it to cool? Assume a = 0.4. ii) What do you mean by steady state stability of electric drive? Explain it. [3] [3]

Answer rating: 100% (QA)

Solutions Step 1 2 i Load Calculation for Electric Motor Given Heating time constant h 100 minutes Cooling time constant c 150 minutes Motor rating 125kW Duty cycle T120 minutes Shutdown period T2 for ... View the full answer