Question

The voltage applied to the stator of a 3-phase induction motor is reduced from 100V to...

The voltage applied to the stator of a 3-phase induction motor is reduced from 100V to a 75V and then to a 50V. Draw the torque-speed characteristics of the motor with these values. The load torque is proportional to the speed squared.

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955...
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 3.0 A(rms) per phase at the rated voltage at a power factor of 0.81 (lagging). The stator resistance Rs = {r_s} ohms. At the rated operating speed,...
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...
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 Ω; r2=0.6258 Ω; 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...
400VLL 4 pole Y connected 50 Hz Induction machine has following impedances referred to stator X1=1,106...
400VLL 4 pole Y connected 50 Hz Induction machine has following impedances referred to stator X1=1,106 X2=0,464 R1=0,641 R2=0,332 Xm=26,3 Rc=50 A load is connected to the motor. Torque and speed characteristics of the load is given below. When the load is connected to the motor what will be the speed? n=28(T-50) - n is speed rpm T is the torque
7-     a 3 phase induction motor haring a synchronous speed is 1600 rpm. it draws a...
7-     a 3 phase induction motor haring a synchronous speed is 1600 rpm. it draws a current of 100Kw a from a 3-phase source. The copper losses and iron losses in the stator are 6KW if the motor runs at 1500 rpm, calculate the following A- The active power transom to the rotor B- The rotor I2R losses C- The mechanical power developed. D- The mechanical power delivered to the load, knowing that the windage and friction losses are equal...
A 230 volt, 60 Hz, 4 pole star connected, three phase induction motor operates at a...
A 230 volt, 60 Hz, 4 pole star connected, three phase induction motor operates at a full load speed of 1710 rpm. The power developed at this speed is 2 horse power. If the supply voltage fluctuates ±10%, determine the torque range of the motor.
Q4 (a) A 3-phase induction motor having a synchronous speed of 1200rpm draws 80kW from a...
Q4 (a) A 3-phase induction motor having a synchronous speed of 1200rpm draws 80kW from a 3-phase feeder. The copper losses and core losses in the stator amount to 5kW. If the motor runs at 1152rpm, calculate: (i) the rotor input power; (ii) the rotor copper losses; (iii) the gross mechanical power output; (iv) the net mechanical power with knowing that the windage and friction losses are 2kW; (v) the efficiency of the motor (b) Compare the brushed motor (DC...
A 37.3 kW, 3 phase, 4 pole, 50 Hz, induction motor has a full load efficiency...
A 37.3 kW, 3 phase, 4 pole, 50 Hz, induction motor has a full load efficiency of 85%. The friction and windage losses are one third of the no load losses and the copper loss equals the iron loss at full load. Find the full load speed. Stator resistance may be neglected. [Answer: 1401.3 rpm]
A 100 KW (OUT PUT), 3300V, 50 Hz, 3-Phase star connected induction motor has a synchronous...
A 100 KW (OUT PUT), 3300V, 50 Hz, 3-Phase star connected induction motor has a synchronous speed of 500 rpm. The full load slip is 1.8%and full load power factor 0.85. Stator copper loss=2440W. Iron loss=3500W. Rotational losses= 1200W. calculate : The rotor copper loss The line current The full load motor efficiency.
Q1). [36 marks in total] a) Explain why the number of poles (teeth) in the stator...
Q1). [36 marks in total] a) Explain why the number of poles (teeth) in the stator and rotor must not be equal for a stepper motor. [6 marks] b) Provide your recommendations for reduction of magnetic loss in an induction motor [6 marks] c) Explain that a single-phase winding induction motor cannot generate torque to start and run the rotor [6 marks] d) Explain the rotor of an induction motor cannot run at the same speed to that of stator...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT