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A 120-V shunt DC motor has armature resistance R,=0.2N and and field resistance Rp=602 . The rated full load current is 42 A. Calculate the following: (A) Calculate the following 1. The starting current if the motor is directly connected across the 120V supply. Express the current as a percentage of the full load value. 2. The value of the external resistance to be connected in series with armature circuit to limit starting current to 150% of the full load current.

A 120-V shunt DC motor has armature resistance R,=0.2N and and field resistance Rp=602 . The rated full load current is 42 A. Calculate the following: (A) Calculate the following 1. The starting current if the motor is directly connected across the 120V supply. Express the current as a percentage of the full load value. 2. The value of the external resistance to be connected in series with armature circuit to limit starting current to 150% of the full load current.

Introductory Circuit Analysis (13th Edition)
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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4. A 120-V shunt DC motor has armature resistance R,=0.2N and and field resistance Rp=602 . The rated full load current is 42 A. Calculate the following: (A) Calculate the following 1. The starting current if the motor is directly connected across the 120V supply. Express the current as a percentage of the full load value. 2. The value of the external resistance to be connected in series with armature circuit to limit starting current to 150% of the full load current.
Transcribed Image Text:4. A 120-V shunt DC motor has armature resistance R,=0.2N and and field resistance Rp=602 . The rated full load current is 42 A. Calculate the following: (A) Calculate the following 1. The starting current if the motor is directly connected across the 120V supply. Express the current as a percentage of the full load value. 2. The value of the external resistance to be connected in series with armature circuit to limit starting current to 150% of the full load current.
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