A 150kW, 3000V, 50Hz, 6-pole star-connected induction motor has a star-connected slip-ring rotor with a transformation...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A 150kW, 3000V, 50Hz, 6-pole star-connected induction motor has a star-connected slip-ring rotor with a transformation ratio of 3.6 (stator/rotor). The rotor resistance is 0.102/phase and its per phase leakage inductance is 3.61 mH. The stator impedance may be neglected. Find (i) the starting current and torque on rated voltage with short- circuited slip-rings, and (ii) the necessary external resistance to reduce the rated voltage starting current to 30A and the corresponding starting torque. A 150kW, 3000V, 50Hz, 6-pole star-connected induction motor has a star-connected slip-ring rotor with a transformation ratio of 3.6 (stator/rotor). The rotor resistance is 0.102/phase and its per phase leakage inductance is 3.61 mH. The stator impedance may be neglected. Find (i) the starting current and torque on rated voltage with short- circuited slip-rings, and (ii) the necessary external resistance to reduce the rated voltage starting current to 30A and the corresponding starting torque.
Expert Answer:
Related Book For
Posted Date:
Students also viewed these electrical engineering questions
-
A 400 V, 3 phase, 50Hz, Star connected Induction motor gave the following test results. No load Test : 400V 8.5A 1,100 W Blocked rotor test : 180V 45A 5,799 W Calculate the line current & power...
-
A dc motor with its rotor and field coils connected in series has an internal resistance of 3.2.n. When the motor is running at full load on a 120-V line, the emf in the rotor is 105 V. (a) What is...
-
A 3 phase ,60 Hz,220 V,5 Hp,6 pole, delta connected wound rotor induction motor has the following per phase parameters referred to the stator : r1=0.545 & r2=0.541 & Xeq=1.68 The full load slip is...
-
Use the information in Figure to answer the following questions: a. What is the six-month forward rate for the Japanese yen in yen per U.S. dollar? Is the yen selling at a premium or a discount?...
-
Taylor Corp. is growing quickly. Dividends are expected to grow at a 30 percent rate for the next three years, with the growth rate falling off to a constant 6 percent thereafter. If the required...
-
Go back to question 2 in Chapter 3. Suppose the marginal cost of producing this item is constant at $5 per item. What is the socially efficient rate of output? Data From Question 2 in Chapter 3 Below...
-
An automobile would be classified as what type of product? a. Convenience b. Shopping c. Specialty d. Unsought
-
What level of total sales must P&G capture at the new price levels to maintain the same level of total contribution before the price reduction (that is, total contribution = $15.4 billion, which is...
-
Presupuesto de Efectivo CASO: Loblaw Manufacturing le ha pedido que cree un presupuesto en efectivo para determinar sus necesidades de financiamiento para el periodo de junio a octubre. Usted ha...
-
There is a database that contains a website's traffic data over a period of 30 days. The first table contains users' information including the user type (user, crawler, admin). The second table...
-
You are the management accountant of Verstappen Ltd and have been asked to evaluate two projects the company is considering. Verstappen Ltd currently has a cost of capital of 9% and at the end of...
-
According to clinical research, nearly one-half of the care provided in the United States falls short of recommended treatment protocols. Discuss how imperfect and asymmetric information contribute...
-
If traditional FFS leads to demand inducement, what constrains the HMO from underproviding care?
-
Suppose that the licensure requirements for health care providers were eliminated. Use supply-and-demand analysis to predict what may happen to the price and quantity of health care services. Are...
-
If there were no subsidies for medical education, would enrollments be larger or smaller? Would the return to medical education be larger or smaller? If physician education was not subsidized, would...
-
Some argue that wide disparities in utilization rates across racial and ethnic groups are indicative of discrimination (see Box 9.3). Use indifference curve analysis to explain why it may be diffi...
-
If a company has $100 in inventories, a current ratio of 0.8, and a quick ratio of 0.4, what is the company's net working capital?
-
On January 1, 2018, Khalid Ltd., which follows IAS 17, entered into an eight-year lease agreement for three dryers. Annual lease payments for the equipment are $28,500 at the beginning of each lease...
-
A loudspeaker is made of a magnetic core of infinite permeability and circular symmetry, as shown in figures a and b. The air-gap length g is much less than the radius r0 of the central core. The...
-
A three-phase Y-connected ac machine is initially operating under balanced three-phase conditions when one of the phase windings becomes open-circuited. Because there is no neutral connection on the...
-
A full-wave diode rectifier is fed from a 50-Hz, 220-V rms source whose series inductance is 12 mH. It drives a load with a resistance 8.4 which is sufficiently inductive that the load current can be...
-
Cruz Manufacturing Ltds sales slumped badly in 2019. For the first time in its history, it operated at a loss. The companys income statement showed the following results from selling 600 000 units of...
-
The following are emails from various students to Dr. Destiny Sands, who is a professor in the English Department. These students are wondering if Dr. Sands would let them register for her...
-
What are some flawed assumptions about workplace communication? What is the reality for each myth?
Study smarter with the SolutionInn App