46. A 60 Hp. 230 volt shunt motor has a shunt field resistance of 38.3 ohm and an armature resistance of 0.04 ohm. The resistance in the starter is 0.66 ohm. Calculate the armature current at the instant it is started. (Assume 3 volt brush drop) a. 328.571 A c. 314.286 A b. 324.286 A d. 341. 286 A

46. A 60 Hp. 230 volt shunt motor has a shunt field resistance of 38.3 ohm and an armature resistance of 0.04 ohm. The resistance in the starter is 0.66 ohm. Calculate the armature current at the instant it is started. (Assume 3 volt brush drop) a. 328.571 A c. 314.286 A b. 324.286 A d. 341. 286 A

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter43: About Dc Motors

Section: Chapter Questions

Problem 1SQ

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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

Solve properly. thanks

46. A 60 Hp. 230 volt shunt motor has a shunt field resistance of 38.3 ohm and an
armature resistance of 0.04 ohm. The resistance in the starter is 0.66 ohm. Calculate
the armature current at the instant it is started. (Assume 3 volt brush drop)
c. 314.286 A
a. 328.571 A
b. 324.286 A
d. 341. 286 A

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