A split phase induction motor is rated at 0.25 hp ,1725 rpm ,120 V ,60 Hz, when the rotor is locked a test at reduced voltage on the main and auxiliary windings yields the following results Auxiliary winding winding Main Parameters Applied voltage in volt Current in Ampere 23 23 4 1.5 Power in watt 60 30 Find • Phase angle between auxiliary current and phase current. • Locked rotor current and power factor at line voltage 120 V. 1- For main winding: P=IVcos0, 0=49.60 Z=V/I=5.75<49.60 For aux. winding 0=29.60

A split phase induction motor is rated at 0.25 hp ,1725 rpm ,120 V ,60 Hz, when the rotor is locked a test at reduced voltage on the main and auxiliary windings yields the following results Auxiliary winding winding Main Parameters Applied voltage in volt Current in Ampere 23 23 4 1.5 Power in watt 60 30 Find • Phase angle between auxiliary current and phase current. • Locked rotor current and power factor at line voltage 120 V. 1- For main winding: P=IVcos0, 0=49.60 Z=V/I=5.75<49.60 For aux. winding 0=29.60

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

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.

Question

single phase machines

A split phase induction motor is rated at 0.25 hp ,1725 rpm ,120 V ,60
Hz, when the rotor is locked a test at reduced voltage on the main and
auxiliary windings yields the following results
Auxiliary
winding winding
Main
Parameters
Applied voltage in volt
Current in Ampere
23
23
4
1.5
Power in watt
60
30
Find
• Phase angle between auxiliary current and phase current.
• Locked rotor current and power factor at line voltage 120 V.
1- For main winding:
P=IVcos0, 0=49.60
Z=V/I=5.75<49.60
For aux. winding
0=29.60

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