Engineering, 06.05.2021 02:10, Lujfl

A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955 rpm and rated torque of 35 Nm. This motor drives a load with a torque characteristic that increases linearly with speed such that it equals the load torque at the rated speed. It draws a current of 3.8 A(rms) per phase at the rated voltage at a power factor of 0.85 (lagging). The stator resistance Rs = 1.9 ohms. At the rated operating speed, calculate the frequency (fbraking) of the phase voltage (Va, braking) needed produce a regenerative braking torque that is 1.4 times the rated torque in magnitude.

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 03.07.2019 15:10, breannaasmith1122

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

Answers: 1

continue

Engineering, 03.07.2019 23:20, abbz13

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

Answers: 3

continue

Engineering, 04.07.2019 18:10, lillygrl100

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Answers: 3

continue

Engineering, 04.07.2019 18:20, rhussein6452

Wiy doeres rere okhn a pump whon working betwon the same pressure range?

Answers: 2

continue

Do you know the correct answer?

A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955 rpm and rated t...