Single phase induction motors

provide mechanical balance

improve power factor and provide better speed regulation

prevent hunting in the motor

eliminate armature reaction

Capacitor run motor

Shaded pole motor

Hysteresis motor

Schrage motor

Universal motor

Repulsion motor

as well as

Reluctance motor

It cannot be reversed, ordinarily

It requires no D.

field excitation for its operation C. It is nothing else but a single-phase, salient pole synchronous-induction motor

Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor

95% to 99%

80% to 90%

50% to 75%

5% to 35%

reduce the effects of armature reaction

increase the torque

series motor compensating winding is employed to A. reduce the effects of armature reaction B. increase the torque C. reduce sparking at the brushes

none of the above

Repulsion induction motor

Repulsion motor

Repulsion start induction run motor

None of the above

It is extremely sensitive to fluctuations in supply voltage

Its high starting torque is due to its high rotor hysteresis loss

It is extremely quiet in operation

It accelerates from rest to full-speed almost instantaneously

voltage rating

dielectric medium

polarity marking

definite value

from main pole to shaded pole

from shaded pole to main pole

either of the above depending on voltage

either of the above depending on power factor