per phase to beis the power factoAns [0.82,0.707 lag]A 150 kW, 3000 V, 50 Ha 6-pole, star-connected induction motor has a star-connected slip ringQ3/rotor with a transformation ratio of 3.6 (stator/rotor). The rotor resistance is 0.1 Q per phase and itsper phase leakage inductance is 3.61 mH. The stator impedance may be neglected. Find thestarting torque on rated voltage with short-circuited slip rings.Ans [513 N mlanQ4/ The rote-

Answered: Image /qna-images/answer/c9c7a655-12f3-4bd7-b204-817de788dbf0.jpg

Ans [0.82,0.707 lag] 3000 V, 50 Ha 6-pole, star-connected induction motor has a star-connected slip ring A 150 kW, rotor with a transformation ratio of 3.6 (stator/rotor). The rotor resistance is 0.1 2 per phase and its per phase leakage inductance is 3.61 mH. The stator impedance may be neglected. Find the starting torque on rated voltage with short-circuited slip rings. Ans (513 N Q4/ The rote-

Ans [0.82,0.707 lag] 3000 V, 50 Ha 6-pole, star-connected induction motor has a star-connected slip ring A 150 kW, rotor with a transformation ratio of 3.6 (stator/rotor). The rotor resistance is 0.1 2 per phase and its per phase leakage inductance is 3.61 mH. The stator impedance may be neglected. Find the starting torque on rated voltage with short-circuited slip rings. Ans (513 N Q4/ The rote-

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A 3-phase, 115-V induction motor has the following constants: R1 = 0.070, R2' =0.08 N, X1=0.40 and X2' =0.20. At what values are for one phase the value of the gross power output?. only at which slip the gross power output will be maximum and
Which of the following can be said about the power factor of an induction motor?a) power factor is 1 regardless of loadB) only under heavy load the power factor is smallC) only under light load the power factor is smalld) power factor is small under rated load alonee) less than three factors under both light and heavy load
A 460-V, 25-hp, 60-Hz, four pole, Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R₁ = 0.641Ω R₂ = 0.3320 X₁ = 1.106Ω X₂ = 0.464Ω RM = 26.3Ω The total rotational losses are 1100 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 2.2 % at the rated voltage and rated frequency, find the motor's a) Speed d) Pconv and Pout b) Stator current e) Tind and Tload c) Power factor f) Efficiency Activate
The use of a series capacitor with the auxiliary windings of a single-phase induction motor permits: * The obtaintion a 90-degrees phase angle between currents in the main and auxiliary windings. The garantee a relatively high starting torque all above
What are the principle characteristics of DC series motor and DC compound motor, and what are its uses? Explain the Difference between Single Phase & Three Phase transformers with a Comparison Chart. What conditions are necessary for paralleling two synchronous generators?
A three-phase induction motor used for a commercial application in Oman 50HZ runs at 584 rpm at no load and at 546 rpm at full load. a) How many poles do this motor have? b) What is the percentage slip at full load? c) The frequency of the rotor currents when slip is 7 % d) The frequency of the rotor currents at standstill.
(Qld) A three-phase 20-pole induction motor is rated at 800 V, 50 Hz. What is the synchronous speed of this machine if the voltage at its terminals is reduced to 400 V (a) 150 rpm, (b) 300 rpm, (c) 600 rpm, (d) 3000 rpm
Three phase slip ring induction motor gives a reading of 65 V across slip rings when at rest with normal stator voltage applied. The rotor is star connected and has an impedance of (0.8 + j6) ohm per phase. Find the rotor current when the machine is (i) at standstill with the slip rings joined to a star-connected starter with a phase impedance of (4+j3) ohms and (ii) running normally with a 5% slip.
A three-phase, two-pole, 35 hp, 480 V, 60 Hz, Y-connected induction motor has the following constants in ohms per phase referred to the stator: R = 0.322N R2 = 0.196 Q X1 = 0.6752 X2 = 0.510Q Xm = 12.52 The total rotational losses are 1850 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 3% at the rated voltage and rated frequency, determine the following: (a) The speed in rpm and in rad/s power factor (d) The developed power and output power (e) The developed torque and output torque (f) The efficiency. (b) The stator current (c) The
In a 3-phase, 4-pole induction motor, The power crossing the air gap of a 60 Hz is 42.6 kW, and the power converted from electrical to mechanical form in the motor is 39.6 kW. If the total mechanical losses are 1000 W, find the load torque of this motor? Select one: O a. None O b. Tload = 208.4 N.m. O c. Tjoad = 232.6 N.m. O d. Tjoad = 220.3 N.m. Clear my choice
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