The total rotor copper loss of a 3-phase, 208V (line-to-line), 60Hz, six-pole inductionmotor is 300W, with the rotor copper resistance = 0.1192 (per phase). The motor drives amechanical load, and the torque (TL) required for the load varies approximately linearlywith the speed that is given by: T₁ = 0.4@m+30 [Nm]. If the turns ratio between thestator and rotor windings is 1, determine the slip for the above condition, and the speed ofthe mechanical load.

Given,Frequency, f = 60 HzNumber of poles, p = 6 The synchronous speed in RPM,…

Answered: The total rotor copper loss of a…

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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The rotor of an 8-pole, 50-Hz, 3-phase induction motor has a resistance of 0.2 Q/phase and runs at 720 r.p.m. If the load torque remains unchanged. Calculate the additional rotor resistance that will reduce this speed by 10% [0.8 2] (City & Guilds, London)
4) A 40-kW induction motor, with a lagging power factor of 0.76 is supplied by a 120-Vrms, 60-Hz sinusoidal voltage source. Find the capacitance needed in parallel with the motor to raise the power factor to 0.9 lagging
Kindly solve what is ask with complete solution so that I can understand. I want a handwritten solution. Thank you very much poi!.
The star-connected rotor of an induction motor has a standstill impedance of (0.4 + j4) ohm per phase and the rheostat impedance per phase is (6 + j2) ohm. The motor has induced emf of 80V between slip-rings at standstill when connected to its normal supply voltage. Find (a) rotor current at standstill with the rheostat in the circuit (b) when the slip-rings are shor circuited and the motor is running with a slip of 3%.
A DC motor is initially at rest and is then connected to a 12V battery. The motor has aresistance of 2 Ohms and an inductance of 0.5 Henrys. The motor has a torque constant of0.1 Nm/A and a back EMF constant of 0.1 V/(rad/s). Determine the current through themotor as a function of time, and the time it takes for the motor to reach 90% of its finalsteady-state speed.
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.
A three-phase induction motor has: n-1500 rpm, nm-1440 rpm, the input power of the motor is Pin = 37.5 kW, if the no-load losses (i.e. stator core losses Pscl & core losses Pa) are equal 1.5 kW. Then the rotor core losses is: 1.44 [kW] 1.50 [kW] 3.56 [kW] 4.56 [kW]
The synchronous reactance of a cylindrical rotor machine is unity. The machine is connected to an infinite bus bar through an equivalent reactance of half of its synchronous reactance. For a maximum power output of 1.3 p.u. delivered at 1.02 p.u. voltage, find E. While the field is undisturbed, find the value of the current if the real power output is reduced to 0.65.p.u.
Q5)A- A 3-phase Induction motor has an efficiency of 0.91 when it delivers an Output power of 22KW. At this load,the stator copper losses equals the rotor copper losses and the total copper losses equals the no- load losses the mechanical losses are one-fourth the no-load losses Find the slip write equations with drawing power flow Diagram ? B-Define the following: (i)Regulation (ii) Slip (iii)Core and shell Transformer (iv)PM motor
An open-circuit voltage of 480 V appears across the slip-rings of a wound-rotor induction motor when the rotor is locked. The stator has 8 poles and is excited by 60 Hz source. If the rotor is driven by a variable-speed dc motor, calculate the open-circuit voltage and frequency across the slip rings if the dc motor turns a. At 500 r/min, in the same direction as the rotating field b. At 600 r/min, in the same direction as the rotating field c. At 1800 r/min, opposite to the rotating field
6) The speed of a d.c. motor can be controlled by varying its flux per pole or resistance of armature circuit. 7) If the impedance triangles of two transformers operating in parallel are not identical in shape and size, the two transformers will run with different power factors. 8) In a DC motor, unidirectional torque is produced with the help of brushes and commutator. 9) The ordinary efficiency of a given transformer is maximum when it runs at half full-load. 10) The series field of a short-shunt d.c. generator is excited by shunt currents. 11) The speed of a d.c. motor can be controlled by varying its flux per pole or resistance of armature circuit. 12) The primary and secondary windings of an ordinary 2-winding transformer always have separate magnetic circuits. 13) A 60 Kw DC four- pole generator has a lap winding if rotated in citrine speed that generate 520 volts, the current flowing in each armature conductors is 22.5A . 14) The function of The Armature is to rectify the…
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