A 120-V shunt DC motor has armature resistance RA=0.2Ω and and field resistance RF=60Ω . The rated full load current is 42 A. Calculate the following: Design a starting circuit for the DC motor that will limit maximum starting current to 150% of rated armature current. 1. Find number of stage in the starting cicuit 2. Find EA at the end of each stage 3. Find the resistance of each stage

A 120-V shunt DC motor has armature resistance RA=0.2Ω and and field resistance RF=60Ω . The rated full load current is 42 A. Calculate the following: Design a starting circuit for the DC motor that will limit maximum starting current to 150% of rated armature current. 1. Find number of stage in the starting cicuit 2. Find EA at the end of each stage 3. Find the resistance of each stage

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter8: Basic Electric Motors

Section: Chapter Questions

Problem 28RQ: What are the advantages and disadvantages of using the following types of motors? shaded-pole...

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