I need the answer as soon as possible (b) A three-phase, four-pole, 415-V, 50-Hz induction generator rated at 15-hp, isdriven by a turbine at 1518 rpm. The equivalent machine parameters (in 2) are:R1 = 0.20, R2 = 0.24, Rfe = 317, X1 = 1.20, X2 = 1.29 and XM = 42. Determinethe active power delivered by the induction generator.

Since various parameters are provided to us, we will simply draw the equivalent circuit as done for…

Answered: (b) A three-phase, four-pole, 415-V,…

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 armature winding resistance of a long shunt connected DC generator is 0.4ohm, the resistances of the shunt and serial field windings are 125 ohms and 0.1 ohms, respectively. While the generator supplies 8KW of power to the load it feeds, which is the voltage it produces since the output voltage is 250V?
A short-shunt generator supplies 220A at 260V. The armature resistance is 0.15Ω, shunt field resistance is 50Ω, and the series field resistance is 0.2Ω. If the SPL amounts to 4% of the total power output, determine the efficiency (in %).
A DC shunt generator has a full load output of 10kW at a terminal voltage of 240V. The armature and the shunt field winding resistances are 0.6 and 160 ohms respectively. The sum of the mechanical and core-losses is 500W. calculate the power required in kW at the driving shaft at full-load, and the corresponding efficiency and voltage regulation
The armature of a 6-pole separately excited dc generator is triplex wave wound with 534 conductors. This machine delivers power to the load at 200Vwhile being driven at 900 rpm. At this load, the armature circuit dissipates 640W. If the flux per pole of this generator is 180- mWb, determine the kW rating of the load served. Assume a total brush contact drop of 2 V.
A 3-phase induction motor, 440-V, 50-Hz, 6-pole, delta-connected has the following equivalent-circuit parameters at normal frequency:R1.2 ohm, R'2=0.18 ohm, X1= x'2=0.58 ohm, all per phase values. The machine is subjected in service to an occasional fall of 40% in both voltage and frequency. What total mechanical load torque is it safe to drive so that the machine just does not stall under these conditions? When operating at normal voltage and frequency, calculate the speed when delivering this torque and the power developed. Calculate also the speed at which maximum torque occurs. If V and f were both halved, what would be the increase in starting torque from the normal direct-on-line start at rated voltage and frequency? If now the machine is run up to speed from a variable-voltage, variable-frequency supply, calculate the required terminal voltage and frequency to give the 'safe' torque calculated above: (i) at starting, (ii) at 500 rev/min. Repeat (d) for the machine to develop a…
The full load slip of a 4-pole, 60Hz, 440V (line-to-line) three phase induction motor is 0.05. (i). What is the speed of the rotating stating? What is the frequency (in Hz) of the rotor current? (ii). When the output power of the motor is 90 hp at a speed of 1732 rmp, rotational losses (which include frictional and core losses) are 10,100W, while copper losses for both the rotor and stator total 3700W. Determine the motor efficiency and line current, assuming the motor has a 0.8pf lagging under the conditions.
A three phase, 4 pole, 3300 V, 50 Hz, star connected Induction motor, has identical primary and referred secondary impedance of value 3+j9 Ohm per phase. Using the approximate circuit, calculate: A. The full load torque at rated slip of 5%. B. The maximum torque at normal voltage and frequency.
Q2. For a 10 kW, 380V, three-phase, four-pole, 1200 r/min, delta-connected induction motor. Adopt a specific magnetic loading of 0.4712 Wb/m2 and a specific electric loading of 23000 ampere-conductors per metre. The motor has a full-load efficiency of 85% and a full-load power factor of 0.8. A square pole design may be assumed and the stator leakage impedance voltage drop may be ignored. Assume also that the winding is full-pitched and uniformly wound. To calculate the following design parameters (a) The approximate outer diameter and length of the rotor core (b) the air gap length of the motor (c) the turns per phase (d) the number of conductors per slot, if 3 slots per pole per phase are chosen
The equivalent circuit parameters of a 230-V, 1-phase, 6-pole, 60-Hz induction motor are: R1 = R2’ =10ohm, X1 = X2’ = 10ohm, and Xm = 100ohm. At a slip of 5%, calculate the developed torque and The input power to the motor at 230V, while running on no-load, is 31.4 W at 1.2 A. What is the approximate efficiency of the motor at 5% slip?
Three-phase 460-hp, 415 V, 4-pole, 50 Hz induction motor is operating at overvoltage of 480 V and reduced load of 80% of the rated value and draws a line current of 624.06A. The losses at these operating conditions are as follows: The stator conductor loss is 12.6kW, the rotor conductor loss is 10.4kW, the core loss is 11.00kW; and rotational losses is 4.129 kW. Sketch the power flow diagram, enter the known values, and determine (a) rotor speed (b) shaft output torque (c) developed mechanical torque in Nm. (d) input power to the stator; (f) the input power factor. Do only part (a), (b) & (c)
Three-phase induction motor, 460 V 50 Hz, 4 poles, 50 hp with Delta, operating at 3.8% slip rated torque when receives Line Voltage 460 V, 50 Hz The parameters of the equivalent circuit per phase are as follows.R1 = 0.33, X1 = X2 = 0.42 and Xm = 30 Ohm / phase.Answer the following questions by neglecting the mechanical losses, Core losses and Stray load losses.A) Value of the rotor resistance R2 B) Maximum torque and rated speed C) line current and starting torque of motor
(a).i. Describe the construction of a DC generator.ii.Describe the principle of opeartion of a three phase induction motor.b) Explain the power angle characteristics curve of a synchronous machine. c) A shunt generator delivers 450A at 230 V and theresistance of the shunt field and armature are 50Ω and 0.03Ωrespectively. Calculate the generated e.m.f.?

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(b) A three-phase, four-pole, 415-V, 50-Hz induction generator rated at 15-hp, is driven by a turbine at 1518 rpm. The equivalent machine parameters (in 2) are: RI = 0.20, R2 = 0.24, Rfe = 317, X1 = 1.20, X2 = 1.29 and XM = 42. Determine %3D the active power delivered by the induction generator.