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For the following two machines P...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronou...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at...
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...
A two-pole, 75kW, 440 V, 50 Hz, Y-connected, three-phase squirrel cage induction motor has the fo...
Please solve this question. Thank you.
A two-pole, 75kW, 440 V, 50 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters, in Ω/phase referred to the stator: R1-0.075, XI 0.17, xm-72, R2-0.065 and X-0.17. Its rated slip is 4%. Assume that the mechanical losses are 1 kW and the core losses are 1.1 kW. Compute: a. The rated input current b. The rated power factor. c. The pullout torque d. The induced and load torques at rated conditions....
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....
The three-phase wye-connected induction motor nameplate gives the following information: 400 V, 1755 rpm, 60 Hz....
The three-phase wye-connected induction motor nameplate gives the following information: 400 V, 1755 rpm, 60 Hz. Rotor speed at no-load is 1799 rpm. At rated voltage and frequency motor core losses are 400 W. At rated rotor speed, mechanical losses are 400 W. The available parameters of the motor conventional equivalent circuit (6-parameters IEEE model) are: R1 = 0.2 Ω, R’2 = 0.2 Ω, X1 = 0.5 Ω, X’2 = 0.2 Ω and Xφ = 20.0 Ω. In all calculations,...
Please show detailed work and write clearly. Thank you. 6. A four-pole squirrel-cage motor has the...
Please show detailed work and write clearly. Thank you.
6. A four-pole squirrel-cage motor has the following characteristics: Power input at a rated load is 5200 W with a power factor of 0.70. Rated speed is 1150 rpm. Resistance of each stator windings (there are three) is Rs-: 0.195 Ω. . The motor is supplied by a three-phase source with a line-to-line voltage of 460 V and a frequency of 50 Hz. The windings of the motor have a Y-connection....
Please show all steps with clear hand-writing. Final answers are provided in the bottom and must match with your answers...
Please show all steps with clear hand-writing. Final answers are
provided in the bottom and must match with your answers.
Consider a 7.5 kW, 2910 rpm three-phase 50Hz induction machine operating at rated voltage. (a) Calculate its synchronous speed in rpm and hence the rated slip speed in rpm. (b)The machine is running at no-load, calculate its operating speed in rpm (c) At what speed does rated output torque occur at? Calculate the rated output torque. (d) Calculate the rated...
can someome show me step by step on how todo problem 4? teachers hint: start with...
can someome show me step by step on how todo problem
4? teachers hint: start with V_ao (armature voltage operating
point), V_fo(field voltage operating point) steady state operatin
point. find I_ao, I_fo, with rated current. draw block diagram for
V_f snd V_a
4·The field current of a separately-excited motor is variable from zero to rated value. Derive the dynamic equations of the de motor, its block diagram, and the small-signal armature-current response for a simultancous voltage input to the field...
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...
A 3-phase, 460 V, 1740 rpm, 60 Hz, 4-pole wound-rotor induction motor has the following parameters...
A 3-phase, 460 V, 1740 rpm, 60 Hz, 4-pole wound-rotor induction motor has the following parameters per phase: R1 = 0.25 Ω, ' 2R = 0.2Ω, ' 1 2 X = X = 0.5Ω, 30 m X = Ω. The rotational losses are 1700 W. With the rotor terminals short-circuited, find: 1. at starting: • current when started direct on full voltage, • a torque 2. at full load: • slip • current • ratio of starting current to full-load...
Problem 5: For the following two machines P 2 MW, line-3300V: Machine 1: A round-rotor synchronous motor with a wound-rotor field has the following parameters: R is negligable.x,-457 Ω at a--2m50 rad/s Machine 2: A salient pole rotor is designed for the same stator yielding the following motor parameters. R is negligable .Х.: 1.3 ถ. X.. 457 at a-.. 2 50 rad /s Find a) Find the back-EMF voltage E, current I, and torque angle δ for both machines at...
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...
Please solve this question. Thank you.
A two-pole, 75kW, 440 V, 50 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters, in Ω/phase referred to the stator: R1-0.075, XI 0.17, xm-72, R2-0.065 and X-0.17. Its rated slip is 4%. Assume that the mechanical losses are 1 kW and the core losses are 1.1 kW. Compute: a. The rated input current b. The rated power factor. c. The pullout torque d. The induced and load torques at rated conditions....
Please show detailed work and write clearly. Thank you.
6. A four-pole squirrel-cage motor has the following characteristics: Power input at a rated load is 5200 W with a power factor of 0.70. Rated speed is 1150 rpm. Resistance of each stator windings (there are three) is Rs-: 0.195 Ω. . The motor is supplied by a three-phase source with a line-to-line voltage of 460 V and a frequency of 50 Hz. The windings of the motor have a Y-connection....
Please show all steps with clear hand-writing. Final answers are
provided in the bottom and must match with your answers.
Consider a 7.5 kW, 2910 rpm three-phase 50Hz induction machine operating at rated voltage. (a) Calculate its synchronous speed in rpm and hence the rated slip speed in rpm. (b)The machine is running at no-load, calculate its operating speed in rpm (c) At what speed does rated output torque occur at? Calculate the rated output torque. (d) Calculate the rated...
can someome show me step by step on how todo problem
4? teachers hint: start with V_ao (armature voltage operating
point), V_fo(field voltage operating point) steady state operatin
point. find I_ao, I_fo, with rated current. draw block diagram for
V_f snd V_a
4·The field current of a separately-excited motor is variable from zero to rated value. Derive the dynamic equations of the de motor, its block diagram, and the small-signal armature-current response for a simultancous voltage input to the field...
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...
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