Homework Answers
rotor frequency of the induction motor is depends on the slip of the rotor
fr = slip * supply frequency
rotor reactance = 2* pi* fr* rotor inductance
Xr
slip of the rotor (option C)
induced emf in rotor
slip of the rotor
so the motor produces more torque and the speed of the motor increases due to Lenz law
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What effect does slip have on the rotor? O a. No effect. b. It allows the...
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?
help!!!! What is the rated velocity and mechanical output power of the rotor? Velocity_1500 Power =...
help!!!!
What is the rated velocity and mechanical output power of the rotor? Velocity_1500 Power = h. r/min 186.4 3. Calculate the rotor slip velocity (in r/min) from procedures 6, 8, 9, 10 and 11. (slip velocity synchronous velocity slip (6) = slip (9) slip (11)-- rotor velocity). (5) r/min slip (8)- r/min r/min slip (10) r/min r/min 6. Couple the DC motor/generator to the wound-rotor motor with the timing belt. Turn on the power supply, Keep the variable output...
b) What effect does a tariff have on gross profit if the company does not...
b) What effect does a tariff have on gross profit if the company does not raise selling prices in response to the tariff? c) What if the company raises selling prices to the full tariff along to the customer (how will it impact gross profit)?
Asynchronous slip-ring motor with 50 Hz frequency, 380/220 V with full load values Pn = 50...
Asynchronous slip-ring motor with 50 Hz frequency, 380/220 V with full load values Pn = 50 HP, nn = 987 rpm, per phase; - rotor circuit resistance 0.2 ohm, - the stationary reactance is 0.5 ohm, - the loadability coefficient is 2.1 and - the number of pole pairs is 8. a)Calculate the motor's full load torque, tipping torque and idle speed and number of revolutions under maximum load. b)To give the motor a maximum torque, calculate the resistance value...
QUESTION 18 What effect does uncertainty have on your estimate of the social discount rate? O...
QUESTION 18 What effect does uncertainty have on your estimate of the social discount rate? O No effect O Increases it O Reduces it O It depends on the type of uncertainty
Utility function is ? = x + 2y. (a) Does ‘income effect’ exist? (b) Does ‘substitution...
Utility function is ? = x + 2y. (a) Does ‘income effect’ exist? (b) Does ‘substitution effect’ exist? Now utility function changes to ? = min[?, ?]. (c) Does ‘income effect’ exist? (d) Does ‘substitution effect’ exist?
a. what effect would have the blockade of voltage gated Na+ channels? b. what effect would...
a. what effect would have the blockade of voltage gated Na+ channels? b. what effect would have the opening of chemically-gated Cl- channels? c. what effect does voltage and chemically gated have in common? d. what final effect do you expect to see when either local or general anesthetics are administered?
f the concentration of a substance is tripled, what effect does it have on the rate...
f the concentration of a substance is tripled, what effect does it have on the rate if the order with respect to that reactant is (a) 0, (b) 1, (c) 2, (d) 3, and (e) ? 7. The following data were collected for the volume of O, produced in the decomposition of H,0, Time (s)ml On 0.0 0.0 45.0 2.0 88.0 3.9 131.0 5.8 Calculate the average rate of reaction for each time interval.
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...
What effect does decreasing automation have on a company? Select One A. Decreases variable costs b...
What effect does decreasing automation have on a company? Select One A. Decreases variable costs by increasing the amount of production capacity B. Decreases variable costs by decreasing the amount of workers needed C. Decreases variable costs by increasing plant utilization D. Both B and C E. None of the above
help!!!!
What is the rated velocity and mechanical output power of the rotor? Velocity_1500 Power = h. r/min 186.4 3. Calculate the rotor slip velocity (in r/min) from procedures 6, 8, 9, 10 and 11. (slip velocity synchronous velocity slip (6) = slip (9) slip (11)-- rotor velocity). (5) r/min slip (8)- r/min r/min slip (10) r/min r/min 6. Couple the DC motor/generator to the wound-rotor motor with the timing belt. Turn on the power supply, Keep the variable output...
QUESTION 18 What effect does uncertainty have on your estimate of the social discount rate? O No effect O Increases it O Reduces it O It depends on the type of uncertainty
f the concentration of a substance is tripled, what effect does it have on the rate if the order with respect to that reactant is (a) 0, (b) 1, (c) 2, (d) 3, and (e) ? 7. The following data were collected for the volume of O, produced in the decomposition of H,0, Time (s)ml On 0.0 0.0 45.0 2.0 88.0 3.9 131.0 5.8 Calculate the average rate of reaction for each time interval.
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...
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