(a) A 30 kW, 90 V, DC shunt generator has armature resistance of 0.09 Q and field resistanceof 20 Q. Consider the DC machine principle of operation to determine the total armaturepower developed when the generator working as:(i)Generator delivering 30kW at its output terminals.(ii)Motor taking 30 kW from the input terminals.(b) A 280 V three-phase, 14hp, 4-pole 50 Hz induction motor is running at slip of 4.5%.consider the AC machine principle of operation and calculate:(i)The speed of the magnetic field in revolution per minute.(ii)The speed of the rotor in revolution per minute.(ii)The rotor frequency in Hertz.(iv)The shaft torque of the motor at rated load.

Since question (a) and (b) are not interlinked as per the guidelines of Bartleby we answer question…

(a) A 30 kW, 90 V, DC shunt generator has armature resistance of 0.09 Q and field resistance of 20 Q. Consider the DC machine principle of operation to determine the total armature power developed when the generator working as: (i) Generator delivering 30kW at its output terminals. (ii) Motor taking 30 kW from the input terminals.

(a) A 30 kW, 90 V, DC shunt generator has armature resistance of 0.09 Q and field resistance of 20 Q. Consider the DC machine principle of operation to determine the total armature power developed when the generator working as: (i) Generator delivering 30kW at its output terminals. (ii) Motor taking 30 kW from the input terminals.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

Question

(a) A 30 kW, 90 V, DC shunt generator has armature resistance of 0.09 Q and field resistance
of 20 Q. Consider the DC machine principle of operation to determine the total armature
power developed when the generator working as:
(i)
Generator delivering 30kW at its output terminals.
(ii)
Motor taking 30 kW from the input terminals.
(b) A 280 V three-phase, 14hp, 4-pole 50 Hz induction motor is running at slip of 4.5%.
consider the AC machine principle of operation and calculate:
(i)
The speed of the magnetic field in revolution per minute.
(ii)
The speed of the rotor in revolution per minute.
(ii)
The rotor frequency in Hertz.
(iv)
The shaft torque of the motor at rated load.

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