2. A shunt motor connected to a 120 Vline runs at a speed of 1200 rpm whenthe armature current is 20 A. The0.05 0armature resistance is 0.05 Q.Assuming constant field flux, what isthe speed when the armature currentis 60 A?V, = 120 V

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2. A shunt motor connected to a 120 V line runs at a speed of 1200 rpm when the armature current is 20 A. The armature resistance is 0.05 Q. Assuming constant field flux, what is the speed when the armature current is 60 A? १०.05 n V, - 120 V

2. A shunt motor connected to a 120 V line runs at a speed of 1200 rpm when the armature current is 20 A. The armature resistance is 0.05 Q. Assuming constant field flux, what is the speed when the armature current is 60 A? १०.05 n V, - 120 V

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter5: Resistors

Section: Chapter Questions

Problem 1PA

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Concept explainers

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.

Question

2. A shunt motor connected to a 120 V
line runs at a speed of 1200 rpm when
the armature current is 20 A. The
0.05 0
armature resistance is 0.05 Q.
Assuming constant field flux, what is
the speed when the armature current
is 60 A?
V, = 120 V

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