Example 6–3. 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: R = 0.641 N X1 = 1.106 N R2 = 0.332 2 X, = 0.464 N XM = 26.3 N 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 percent at the rated voltage and rated frequency, find the motor's (b) Stator current

Example 6–3. 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: R = 0.641 N X1 = 1.106 N R2 = 0.332 2 X, = 0.464 N XM = 26.3 N 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 percent at the rated voltage and rated frequency, find the motor's (b) Stator current

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...

See similar textbooks

Similar questions

• Q5/ in a DC motor. List and describe the types of losses that occur
explain the phasor diagram of slip phase induction motor
choose
A 3 phase AC induction motor is operating at no load. What is the power factor? Group of answer choices A) leading B) lagging C) neither leading nor lagging
Question -9b
3.4 The rotor power output of 3-phase induction motor is 15 k. The rotor copper losses at a slip of 4% will be (a) 600 W (c) 650 W (b) 625 W (d) 700 W
10
A 20-pole, three-phase, star-connected alternator rotates at 300 rpm. The armature has 360 slots and 6 leads per slot. The width of the coils is 5/6 from the polar pass. If the maximum flux per pole, with sinusoidal distribution, is 0.086 Wb, what will be the values of the f.e.m.s. phase and line
A three-phase induction motor operates at a slip of 3% and has a rotor copper loss of 300W. The rotational loss is 1500W. Determine (a) the airgap power and (b) the power output.
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
Choose True (V) or false( x) for the following : 4) Reluctance is a measure of "opposition" the magnetic circuit offers to the flux. 5) The rated output power (transformer rating) can be used to determine the turns ratio of the transformer. 6) With the increase in speed of a series DC motor, Both back emf as well as line current increase. 7) When an induction motor is stationary, the stator and rotor windings form the equivalent of a transformer. 8) Increasing the load current for DC Self-excited generator Shunt-Wound Generator will increase the terminal voltage. 9) In lap windings there are as many paths in parallel and used to produce high current, low voltage output. 10) In 3-pahse induction motor, if the rotor speed increases, the rate at which the rotating magnetic field cuts the rotor bars is increasing.
The shunt field winding of a shunt generator has a resistance of 80ohms at 20 degrees Celsius. After several hours of continuous operation, the winding temperature rises to 50 degrees Celsius. How much is the winding resistance under this condition. Assume the resistance temperature coefficient of copper to be 0.004 ohm per degree at 0 degree Celsius. *