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Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronou...
Please show the whole details in a clear way . For the following two machines P...
Please show the whole details in a clear way .
For the following two machines P 2 MW, Vine 3300V Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable,x,-. 4.57 Ω at ae-: 2π50 rad /s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable, Xd-1.3 ถ. Xq-4.57 Ω at ae 2n50 rad /s Find a) Find the back-EMF voltage E,...
please solve the multiple choices [17-18-19-20] (a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical in...
please solve the multiple choices [17-18-19-20]
(a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical input power are adjusted so that the machine delivers 15 k W at 0.9 lagging power factor. Is it a generator or motor? Draw the per- phase equivalent circuit of machine. (c) Determine the excitation voltage and the power angle (degree) Problem 1. (10 Points) A 3-phase, 20 kVA, 460...
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)...
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....
A 3-phase round rotor synchronous motor has a per phase terminal voltage of 480 V. This...
A 3-phase round rotor synchronous motor has a per phase terminal voltage of 480 V. This machine has a synchronous resistance and reactance of 0.25 ohm and 3.8 ohms, respectively. The excitation and field voltage of this machine is equal to 457 V and 150 V, respectively. The machine is operating at a torque angle of -8° and its field current equal to 3 A. With total rotational losses equal to 700 W, determine the following: a. Input Real and...
15. Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine gi...
Example 6C:
15. Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine given in Example 6C for operation as a motor when connected to an electric source of (a) 120 Hz with twice rated voltage, (b) 60 Hz with rated voltage, (c) 30 Hz with one-half rated voltage, and (d) 6 Hz with 10 percent rated voltage. Example 6C. The parameters for the equivalent circuit shown in Fig. 6.8-1 may be calculated by using electromagnetie...
please provide full solution for 3b and 3c ii） 3b) Induction Machine Analysis (9 marks ]...
please provide full solution for 3b and 3c ii）
3b) Induction Machine Analysis (9 marks ] A 415 V, 50 Hz, 1420 rpm, three-phase, star-connected induction machine has the following equivalent-circuit parameters (referred to the stator winding where appropriate): stator resistance R -0.52, rotor resistance R'-0.622 stator leakage reactance X1 = 1.2.2, rotor leakage reactance X' = 1.30 magnetising reactance XM-802, core loss resistance Re - 2400 In your calculations you should use the simplified equivalent circuit. i) The machine...
Question 5 (Svnchronous machines) a. A synchronous generator connected to an infinite grid has its frequency and terminal b. A six-pole, Y-connected three-phase synchronous machine rated 208 V (line-...
Question 5 (Svnchronous machines) a. A synchronous generator connected to an infinite grid has its frequency and terminal b. A six-pole, Y-connected three-phase synchronous machine rated 208 V (line-to- voltage fixed. What is the effect of increasing the excitation current in this case? line), 5500 VA has a synchronous reactance of 8 2 per phase at rated terminal voltage. It is operating as a generator connected to an infinite grid Determine the excitation voltage and the power angle if the...
2. A 208V, two pole, 60 Hz, y connected wound rotor induction motor is rated at...
2. A 208V, two pole, 60 Hz, y connected wound rotor induction motor is rated at 15hp. Its equivalent circuit parameters are R:-0.200, R:-0.120, X.-X-0.410, X-150. The rotational losses are 430W. The motor drives a mechanical load with a slip of 5 percent. By using simplified equivalent circuit calculate; (30 pts) a) The motor speed in revolutions per minute and radians per second. b) The line current c) The stator copper losses. d) The air gap power. e) The power...
3c) Induction Machine Analysis [ 8 marks ] A 415 V, 50 Hz, 1450 rpm, three-phase,...
3c) Induction Machine Analysis [ 8 marks ] A 415 V, 50 Hz, 1450 rpm, three-phase, star-connected induction machine has the following equivalent circuit parameters (referred to the stator winding where appropriate) stator resistance R 0.3 ohms, rotor resistance R2 0.2 ohms stator leakage reactance X 2 ohms, rotor leakage reactance X2' 2 ohms magnetising reactance XM 50 ohms, core loss resistance Rc 200 ohms In your calculations, you should use = the simplified equivalent circuit i) Find the number...
Please show the whole details in a clear way .
For the following two machines P 2 MW, Vine 3300V Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable,x,-. 4.57 Ω at ae-: 2π50 rad /s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable, Xd-1.3 ถ. Xq-4.57 Ω at ae 2n50 rad /s Find a) Find the back-EMF voltage E,...
please solve the multiple choices [17-18-19-20]
(a) What kind of rotor construction is used in this machine? Cylindrical or salient pole rotor? Why? (b) The field current and the mechanical input power are adjusted so that the machine delivers 15 k W at 0.9 lagging power factor. Is it a generator or motor? Draw the per- phase equivalent circuit of machine. (c) Determine the excitation voltage and the power angle (degree) Problem 1. (10 Points) A 3-phase, 20 kVA, 460...
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)...
A 3-phase round rotor synchronous motor has a per phase terminal voltage of 480 V. This machine has a synchronous resistance and reactance of 0.25 ohm and 3.8 ohms, respectively. The excitation and field voltage of this machine is equal to 457 V and 150 V, respectively. The machine is operating at a torque angle of -8° and its field current equal to 3 A. With total rotational losses equal to 700 W, determine the following: a. Input Real and...
Example 6C:
15. Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine given in Example 6C for operation as a motor when connected to an electric source of (a) 120 Hz with twice rated voltage, (b) 60 Hz with rated voltage, (c) 30 Hz with one-half rated voltage, and (d) 6 Hz with 10 percent rated voltage. Example 6C. The parameters for the equivalent circuit shown in Fig. 6.8-1 may be calculated by using electromagnetie...
please provide full solution for 3b and 3c ii）
3b) Induction Machine Analysis (9 marks ] A 415 V, 50 Hz, 1420 rpm, three-phase, star-connected induction machine has the following equivalent-circuit parameters (referred to the stator winding where appropriate): stator resistance R -0.52, rotor resistance R'-0.622 stator leakage reactance X1 = 1.2.2, rotor leakage reactance X' = 1.30 magnetising reactance XM-802, core loss resistance Re - 2400 In your calculations you should use the simplified equivalent circuit. i) The machine...
Question 5 (Svnchronous machines) a. A synchronous generator connected to an infinite grid has its frequency and terminal b. A six-pole, Y-connected three-phase synchronous machine rated 208 V (line-to- voltage fixed. What is the effect of increasing the excitation current in this case? line), 5500 VA has a synchronous reactance of 8 2 per phase at rated terminal voltage. It is operating as a generator connected to an infinite grid Determine the excitation voltage and the power angle if the...
2. A 208V, two pole, 60 Hz, y connected wound rotor induction motor is rated at 15hp. Its equivalent circuit parameters are R:-0.200, R:-0.120, X.-X-0.410, X-150. The rotational losses are 430W. The motor drives a mechanical load with a slip of 5 percent. By using simplified equivalent circuit calculate; (30 pts) a) The motor speed in revolutions per minute and radians per second. b) The line current c) The stator copper losses. d) The air gap power. e) The power...
3c) Induction Machine Analysis [ 8 marks ] A 415 V, 50 Hz, 1450 rpm, three-phase, star-connected induction machine has the following equivalent circuit parameters (referred to the stator winding where appropriate) stator resistance R 0.3 ohms, rotor resistance R2 0.2 ohms stator leakage reactance X 2 ohms, rotor leakage reactance X2' 2 ohms magnetising reactance XM 50 ohms, core loss resistance Rc 200 ohms In your calculations, you should use = the simplified equivalent circuit i) Find the number...
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