A 480V, 50 Hz, 6-pole, 3-phase, delta-connected AC induction motor has the following parameters:R1 = 0.4 Ω, R2 = 0.2 Ω, Χ1 = 0.3 Ω, Χ2 = 0.8 Ω, Xm = 26 Ω.Assume that the rotational losses are 1199 W. The motor drives a mechanical load at a speed of970 rpm. Calculate the line current (in Amps).jXjX₂

Answered: Image /qna-images/answer/4f032fd0-165b-4138-9a6e-ff5948d1f771.jpg

A 480V, 50 Hz, 6-pole, 3-phase, delta-connected AC induction motor has the following parameter R₁ = 0.4 S2, R₂ = 0.2 , X₁ = 0.3 , X₂ = 0.8 , Xm = 26 Q. Assume that the rotational losses are 1199 W. The motor drives a mechanical load at a speed of 970 rpm. Calculate the line current (in Amps). jX, V₁ jX₂

A 480V, 50 Hz, 6-pole, 3-phase, delta-connected AC induction motor has the following parameter R₁ = 0.4 S2, R₂ = 0.2 , X₁ = 0.3 , X₂ = 0.8 , Xm = 26 Q. Assume that the rotational losses are 1199 W. The motor drives a mechanical load at a speed of 970 rpm. Calculate the line current (in Amps). jX, V₁ jX₂

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...

See similar textbooks

Similar questions

A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is the horsepower output of the motor?
Induction motors and welding transformers require magnetizing current, which causes a. lagging power factor. b. leading power factor. c. unity power factor. d. zero power factor.
A four-pole induction motor drives a load at 2575 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. ▾ Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit ▾ Part B Value μÀ Submit I= Value Provide Feedback ^ Request Answer If the dc-to-ac converter has a power efficiency of 85 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. 4 Ò Request Answer Units ? Units ?
The rotor of a 3-phase, 60 Hz, 4-pole induction motor takes 118 kW at 3Hz. The motor has stator copped loss of 2.95 kW, a mechanical loss of 2kW and a stator core loss of 1.7 kW. Solve for the motor efficiency
8. A 3-phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is ............ (i) 20 W (iii) 500 W (ii) 980 W (iv) 200 W
The rotor of a 220 –V 60 Hz, 4-pole induction motor has a power input of 80kW is observed that the rotor emf makes 90 cycles per minute. Calculate the rotor copper loss. (a). 2kW (b). 5kW (c). 3kW (d). 4kW
A four-pole induction motor drives a load at 2478 rpm. This is to be accomplished by using an electronic converter to convert a 400-V dc source into a set of three-phase ac voltages. Part A Find the frequency required for the ac voltages assuming that the slip is 4 percent. The load requires 2 hp. Express your answer to three significant figures and include the appropriate units. f= Submit Part B Value I = HA Request Answer Submit If the dc-to-ac converter has a power efficiency of 90 percent and the motor has a power efficiency of 80 percent, estimate the current taken from the dc source. Express your answer to three significant figures and include the appropriate units. HÅ Value Units Request Answer ? Units ?
The speed of an induction motor fed from a 3-phase and 50 Hz source is 1440 rpm, so which of the following is the number of poles of the motor?a)2b)4C)6d)8f) 12
In a three-phase induction motor the maximum torque occurs at 20% slip and the equivalent resistance of the secondary is 0.04Ω per phase. Find the equivalent load resistance and the load voltage and the load current. Output power is 20 kW.
If a 4-pole induction motor has a synchro- nous speed of 1500 r.p.m., then, supply fre- quency is (1) 50 Hz 60 Hz (iii) (ii) 25 Hz (iv) none of the above
What will be the operating power factor of a 3-phase induction motor, whose ratings are 230 V, 50 Hz, 120 hp, and 4-poles? Motor is operating at rated conditions with an efficiency of 92% and draws a line current of 260 A. The core loss and stator copper losses are 1710 W and 2830 W respectively. (a) 0.85 (c) 0.93 (b) 0.90 (d) 0.80
A 460 V, 25 hp, 60 Hz, wye-connected, four-pole induction motor has the following impedances in ohms per phase referred to the stator circuit: R1=0.641W, R2=0.332W, X1-1.106W, X2=0.464W, Xm=26.3W The total rotational losses are 1100 W and are assumed to be constant. Core losses are grouped with rotational losses. For a rotor slip of 2.2% at rated voltage and frequency, find the following motor quantities: a) Speed, b) Stator current, c) Power factor, d) Pd and Pout. e) td and tload f) Efficiency