Q18. A 320 V series motor takes 80 A and runs at 1080 rev/min at full load. The armature resistance is 0.2 Q and the series winding resistance is 0.05 Q. Assuming the flux is proportional to the field current, calculate the speed when developing full-load torque, but with a 0.15 N diverter in parallel with the field winding.

Q18. A 320 V series motor takes 80 A and runs at 1080 rev/min at full load. The armature resistance is 0.2 Q and the series winding resistance is 0.05 Q. Assuming the flux is proportional to the field current, calculate the speed when developing full-load torque, but with a 0.15 N diverter in parallel with the field winding.

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

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

Question

Q18. A 320 V series motor takes 80 A and runs at 1080
rev/min at full load. The armature resistance is 0.2 Q and
the series winding resistance is 0.05 Q. Assuming the flux
is proportional to the field current, calculate the speed when
developing full-load torque, but with a 0.15 Q diverter in
parallel with the field winding.

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