A 220 V three phase motor takes 21,437 W at 0.71 lagging power factor. What is the line curent?I= P/43 VL * P.P/43*= 79.23L-56.25 ACL-7923 AIL-137.24 ACL-45.74 A

For 3 phase,P3ϕ=3 VL IL cosϕ IL =P3ϕ3 VL cosϕ For 1 phase,P1ϕ= VL IL cosϕ IL =P1ϕ VL cosϕ

Answered: A 220 V three phase motor takes 21,437…

A 220 V three phase motor takes 21,437 W at 0.71 lagging power factor. What is the ine curent? 1=P/43 VL* P. ⒸL-56.25 A CL-7923 A L-137.24 A CL-45.74 A * = 79.23

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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Concept explainers

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.

Question

A 220 V three phase motor takes 21,437 W at 0.71 lagging power factor. What is the line curent?
I= P/43 VL * P.
P/43*
= 79.23
L-56.25 A
CL-7923 A
IL-137.24 A
CL-45.74 A

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