1)TELL THE RELATIONSHIP BETWEEN STARTING TORQUE , STARTING CURRENT , SLIP , AND SPEED IN CASE...
1)TELL THE RELATIONSHIP BETWEEN STARTING TORQUE , STARTING CURRENT , SLIP , AND SPEED IN CASE OF INDUCTION MOTOR I MEAN THAT IF I AM GIVEN 2 QUANTITIES FROM THEM THEN HOW I CAN MAKE GRAPGH FROM THEM
2) WHAT IS SYNCHRONUS SPEED
3) WHAT IS NOMINAL TORQUE, BREAKDOWN TORQUE, PULL UP TORQUE
4) GIVE CHARACTERISTICS OF WOUND ROTOR INDUNTION MOTOR UNDER NO LOAD , LOAD AND ROTOR IS LOAD
Homework Answers
Add Answer to:
1)TELL THE RELATIONSHIP BETWEEN STARTING TORQUE , STARTING
CURRENT , SLIP , AND SPEED IN CASE...
I just want the answer for part D. So, I will give the answers to the rest of the questions to as...
I just want the answer for part D. So, I will give the answers
to the rest of the questions to assist in answering part d of the
question.
A) i) 244.2 A (ii) 0.408 lagging (iii) 183.8 Nm B) (i) 0.033
(ii) 42.8A (iii) 5.7 (iv)0.941 lagging (v) 162.8 Nm (vi) 87% C) (i)
Rth = 0.24 Xth = 0.49 X2 = 0.5 (ii) 0.196 (iii) 431.2 Nm
Hopefully, these answers will help
A 3-phase, Y-connected, 460V, 60Hz, 4-pole...
I want to solve this problem step by step. Thanks 3. (25 points) Induction Motor Torque Production. An induction motor has the torque vs. speed curve shown below. By changing the machine's i...
I want to solve this problem step by step. Thanks
3. (25 points) Induction Motor Torque Production. An induction motor has the torque vs. speed curve shown below. By changing the machine's inputs or its parameters, we can influence its behavior. For example, cutting its terminal voltage by half yields the changes illustrated below Peak Torque at same speed t (slip) fslip) load slip) of the Peak Torque Slightly reduced operating speed, but double the operating slip 200 -200 100...
3. (25 points) Induction Motor Torque Production. An induction motor has the torque vs. speed curve shown below. By changing the machine's inputs or its parameters, we can influence it...
3. (25 points) Induction Motor Torque Production. An induction motor has the torque vs. speed curve shown below. By changing the machine's inputs or its parameters, we can influence its behavior. For example, cutting its terminal voltage by half yields the changes illustrated below Peak Torque at same speed t(slip) % of the Peak Torque Floalslip) Slightly reduced operating speed, but double the operating slip 2001000 100 200 slip) % of the Starting Torque We can influence its torque production...
A wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a...
A wound rotor, induction motor has a rotor resistance of 0.6 ohms per phase and a rotor leakage reactance of 8 ohms . a) What is the operating speed (rpm) of this 2-pole induction motor fed from a 50 Hz supply if the slip is 5%? b) If maximum torque occurs when R2 = sX2, what is the slip at maximum torque? c) What resistance must be added to the rotor circuit to give maximum starting torque?
Name: 23. A 3-phase, 5000 hp, 6000 v,60 Hz, 12-pole wound-rotor induction motor has the 1, resistance between stator terminals-o12 Ω 2. resistance between rotor slip-rings-0.0073 Ω 3. windage and...
Name: 23. A 3-phase, 5000 hp, 6000 v,60 Hz, 12-pole wound-rotor induction motor has the 1, resistance between stator terminals-o12 Ω 2. resistance between rotor slip-rings-0.0073 Ω 3. windage and friction losses-51 kW following characteristics 4. iron losses in the stator-39 kW 5. locked rotor current at 6000 V-1800 A 6. active power to the stator with rotor locked 2207 kw Calculate under full-load voltage locked-rotor conditions a. Reactive power absorbed by the motor b. FR losses in the stator...
Electrical Machines
2) (a) Describe the principle of operation of 3-phase induction motor. [8 Marks](b) Explain slip as applied to three phase induction motor. [2 Marks]3) Derive an expression for the total armature torque of DC motor. [10 Marks]5) List the starting methods used in starting 3-phase induction motors and explain any two of these methods. [10 Marks]6) (a) A 60 kW, 400 V d.c. shunt motor has 4 poles a 2-circuit wave-connected armature winding with 450 conductors. The flux per pole...
A 2-pole, 20MW single phase induction machine used for driving a train has a slip of...
A 2-pole, 20MW single phase induction machine used for driving a train has a slip of 4.12%, when it is delivering 80% of its rated torque and 15.6MW. The rotor speed at the rated torque/power is 3415 rpm. (i) Determine the synchronous speed of the motor, under the above conditions, as well as the frequency required by the power electronics in the drive (ii) If the torque and synchronous speed were kept constant under the above conditions, calculate the load...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are R=0.100 Ry=0.070. X - 10.00 R = 250 X; -0.2100 X=0.21002 Praw=500 W P =0.5% of input at full load For a slip of 0.05, find (a) The line current (b) The induced voltage in the rotor (c) The stator power factor (d) The rotor power factor (e) The rotor frequency (f) The stator copper losses (g) The core loss (h)...
Please use exact methods and not approximations! 7.15. A three-phase, 460 V, 60 Hz, 1760 rpm, wound-rotor induction mot...
Please use exact methods and not approximations!
7.15. A three-phase, 460 V, 60 Hz, 1760 rpm, wound-rotor induction motor has the following equivalent circuit parameters Ri=0.25 ohm : R'= 0.2 ohm : Xi = 1.2 ohm : X2,= 1.1 ohm : 'Ku = 35 ohm The motor is connected to a 3ph, 460V, 60Hz supply and is star-connected. Use the simplified equivalent circuit. Initially the external rotor resistance is set to zero. (a) Calculate the speed (in rpm) at which...
A four-pole Y-connected, 415 V, 50 Hz, induction motor has phase equivalent circuit parameters of R1=...
A four-pole Y-connected, 415 V, 50 Hz, induction motor has phase equivalent circuit parameters of R1= 2 ohms. R2=2.2 ohms. X1=X2=4 ohms. X(motor)=90 ohms Under rated condition, the rotor slip is 6%. (i) What is the rotor speed and rotor electrical frequency under the rated conditions; (ii) Calculate the stator input current, power factor, and electromagnetic torque under these conditions; (iii) The machine is running at rated conditions and it is to be stopped by switching the two stator leads....
I just want the answer for part D. So, I will give the answers
to the rest of the questions to assist in answering part d of the
question.
A) i) 244.2 A (ii) 0.408 lagging (iii) 183.8 Nm B) (i) 0.033
(ii) 42.8A (iii) 5.7 (iv)0.941 lagging (v) 162.8 Nm (vi) 87% C) (i)
Rth = 0.24 Xth = 0.49 X2 = 0.5 (ii) 0.196 (iii) 431.2 Nm
Hopefully, these answers will help
A 3-phase, Y-connected, 460V, 60Hz, 4-pole...
I want to solve this problem step by step. Thanks
3. (25 points) Induction Motor Torque Production. An induction motor has the torque vs. speed curve shown below. By changing the machine's inputs or its parameters, we can influence its behavior. For example, cutting its terminal voltage by half yields the changes illustrated below Peak Torque at same speed t (slip) fslip) load slip) of the Peak Torque Slightly reduced operating speed, but double the operating slip 200 -200 100...
3. (25 points) Induction Motor Torque Production. An induction motor has the torque vs. speed curve shown below. By changing the machine's inputs or its parameters, we can influence its behavior. For example, cutting its terminal voltage by half yields the changes illustrated below Peak Torque at same speed t(slip) % of the Peak Torque Floalslip) Slightly reduced operating speed, but double the operating slip 2001000 100 200 slip) % of the Starting Torque We can influence its torque production...
Name: 23. A 3-phase, 5000 hp, 6000 v,60 Hz, 12-pole wound-rotor induction motor has the 1, resistance between stator terminals-o12 Ω 2. resistance between rotor slip-rings-0.0073 Ω 3. windage and friction losses-51 kW following characteristics 4. iron losses in the stator-39 kW 5. locked rotor current at 6000 V-1800 A 6. active power to the stator with rotor locked 2207 kw Calculate under full-load voltage locked-rotor conditions a. Reactive power absorbed by the motor b. FR losses in the stator...
5. A 208-V four-pole 60-Hz Y-connected wound-rotor induction motor is rated at 30 hp. Its equivalent circuit components are R=0.100 Ry=0.070. X - 10.00 R = 250 X; -0.2100 X=0.21002 Praw=500 W P =0.5% of input at full load For a slip of 0.05, find (a) The line current (b) The induced voltage in the rotor (c) The stator power factor (d) The rotor power factor (e) The rotor frequency (f) The stator copper losses (g) The core loss (h)...
Please use exact methods and not approximations!
7.15. A three-phase, 460 V, 60 Hz, 1760 rpm, wound-rotor induction motor has the following equivalent circuit parameters Ri=0.25 ohm : R'= 0.2 ohm : Xi = 1.2 ohm : X2,= 1.1 ohm : 'Ku = 35 ohm The motor is connected to a 3ph, 460V, 60Hz supply and is star-connected. Use the simplified equivalent circuit. Initially the external rotor resistance is set to zero. (a) Calculate the speed (in rpm) at which...
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