ACES EE Single Phase Motor

A single phase induction motor employs ___ rotor

• wound

• squirrel cage

• either wound or squirrel cage

• none of these

Most of single phase induction motors are ___ pole machines

• 2

• 8

• 4

• 6

The starting winding of a single phase induction motor has ___ that of the main winding

• same number of poles as

• more poles than

• less poles than

• none of these

In a single phase induction motor, speed sensitive centrifugal switch is connected in ___ winding

• parallel with main

• series with main

• parallel with starting

• series with starting

The purpose of starting winding in a single phase induction motor is to

• reduce losses

• provide starting current

• produce rotating flux in conjunction with the main

• produce high starting power

The single phase shaded pole motor has

• higher power factor

• squirrel cage rotor

• wound rotor

• high starting torque

For the same rating, a dc series motor cost ___ single phase series motor

• less than

• more than

• about the same

• none of these

The least expensive fractional hp motor is

• capacitor start

• split phase

• shaded pole

• universal

A Capacitor-run single phase induction motor is essentially a

• Simulated 3 phase induction motor

• a single phase motor with power factor correction

• a single phase motor with starting winding

• a simulated two phase induction motor*

The starting torque of a capacitor start split phase induction motor is directly related to the angle-α between its two stator winding currents by the relation

• sin α

• cos α

• tan α

• sin α/2