A 400V, three phase, 50Hz, 4 pole induction motor is operating at a per unit slip...

A 400V, three phase, 50Hz, 4 pole induction motor is operating at a per unit slip of 40KW from the suppply. Under these conditions stator losses amount to 2.2 KW and rotational losses due to friction and windage amount to 1.4KW. Calculate the net horsepower and torque developed.

Expert Solution

Manojponduru answered 2 years ago

A 400V, 2 pole, 50 Hz, three-phase induction motor is drawing 60 A at 0.85 PF...

A 400V, 2 pole, 50 Hz, three-phase induction motor is drawing 60 A at 0.85 PF lagging. The stator copper losses are 2 kW, the stator core losses are 1.8 kW and rotor copper losses are 700 W. The friction and windage losses are 600 W, the stray loss 100 W, and rotor core loss 100 W. Find the following quantities: a. The air gap power. b. The developed mechanical power. c. The output power. d. The efficiency of the...

A 440 V 4-pole 3 phase 50 Hz slip ring induction motor has its stator winding...

A 440 V 4-pole 3 phase 50 Hz slip ring induction motor has its stator winding mesh connected and its rotor winding star connected. The standstill voltage measured between slip rings with the rotor open –circuited is 218 V. the stator resistance per phase is 0.6Ω and the stator reactance per phase is 3Ω. The rotor resistance per phase is 0.05Ω and the rotor reactance per phase is 0.25Ω. Calculate the maximum torque and the slip at which it occurs....

A4-pole,250V, 50Hz single phase induction motor has rotor frequency 2 Hz, in starting has following parameters:...

A4-pole,250V, 50Hz single phase induction motor has rotor frequency 2 Hz, in starting has following parameters: main winding Rm=2 Ω ,Xm=4 Ω and staring winding : Rs =4 Ω , XLS=2 Ω ,Xcs=8 Ω. Find : speed of motor, Im , IS, θm θs, α and p.f.

Tests were carried out on a three-phase 220 V, 50 Hz, 4-pole delta-connected induction motor. The...

Tests were carried out on a three-phase 220 V, 50 Hz, 4-pole delta-connected induction motor. The following results were obtained from open circuit (no-load) and short circuit tests. Open Circuit (no-load) Test Applied Stator Voltage VLine (V) Stator Line Current ILine (A) Total Input Power Pin (W) 240 9.6 536 220 7.2 420 200 5.4 352 180 4.3 304 160 3.5 276 140 3.0 248 120 2.5 224 Short Circuit (locked rotor) Test Applied Stator Voltage VLine (V) Stator Line...

A 6-pole and three-phase induction motor has synchronous speed of (1000) RPM. a) Find the no-load...

A 6-pole and three-phase induction motor has synchronous speed of (1000) RPM. a) Find the no-load and full-load operating speed of motor for the cases given, 1. 2.5Hz electrical frequency of rotor for no-load condition. 2. 6.3Hz electrical frequency of rotor for full-load condition. b) Find the speed regulation of motor by using parameters found above. c) Determine the electrical frequency of rotor under full-load condition so that speed regulation would be equal to 5%? (Electrical frequency of rotor for...

A 3 phase 460 V, 60 Hz, 4 pole, delta connected induction motor has the following...

A 3 phase 460 V, 60 Hz, 4 pole, delta connected induction motor has the following equivalent circuit parameters. Rs = 0.42 Ω, Rr = 0.23 Ω, Xs = Xr = 0.82 Ω. Xm = 22 Ω. The no load loss = 60 W and may be assumed constant. The rotor speed is 1750 rpm. Use the approximate equivalent circuit ( i.e. the Xm branch is at the very left of the circuit) determine the following a. the synchronous speed...

Question 5 The following test data was captured from a 15hp, 4-pole, 400V, Design A, Induction...

Question 5 The following test data was captured from a 15hp, 4-pole, 400V, Design A, Induction motor. The star-connected machine has a rated current of 50A. No-Load Test VT = 400V f = 50Hz IA = 12A Pin = 650W IB = 12.1A IC = 12.05A 16 DC Test V = 15V I = 50A Locked Rotor Test VT = 35V f = 15Hz IA = 50.1A Pin = 1850W IB = 49.5A IC = 48.75A 5.1 Calculate the parameters...

The parameters of a 3-phase, 4-pole, 50 Hz, Y-connected, wound-rotor induction motor are listed below. These...

The parameters of a 3-phase, 4-pole, 50 Hz, Y-connected, wound-rotor induction motor are listed below. These are the default values of the “Asynchronous Machine” model in MATLAB Simulink. r1=0.5968 ?; r2=0.6258 ?; L1=0.0003495 H; L2=0.005473 H; Lm=0.0354 H; Stator line voltage = 400 V rms. The motor for rotor speeds nm= 0 to 1500 rpm. X1= 0.1097 ohm, X2= 1.719 ohm , Xm= 11.12 ohm, RTH = 0.5853 , XTH = 0.1395 and VTH = 230.82 V. Suppose the motor...

A 3-phase 208V line-to-line), 4 pole 1746rpm induction motor is taking 45kVA at 0.9 power factor....

A 3-phase 208V line-to-line), 4 pole 1746rpm induction motor is taking 45kVA at 0.9 power factor. The total developed torque is 2000N-m and the rotational losses are 1.5kW. Determine the following: a) The rotor copper losses b) The overall efficiency c) The stator winding resistance (per-phase)

A 400 V,50 Hz, six-pole three-phase induction motor drives a constant load of 140 N.m. The...

A 400 V,50 Hz, six-pole three-phase induction motor drives a constant load of 140 N.m. The motor has the following parameters ?1=0.294 Ω ?1=1.39 ?? ??=41 ?? ?2′=0.156 Ω ?2′=0.74 ?? 1) Starting. Calculate the following: i) Motor starting current. ii) Motor starting torque. 2) Maximum operating point. Calculate the following: i) Slip at which maximum torque is developed. ii) Maximum torque developed. 3) Steady-state operation. Calculate the following: i) Motor slip. ii) Motor speed. iii) Motor current. iv) Motor...

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