Single Phase Induction Motor

We utilize the single-phase power program more widely than 3 phase system for domestic purposes, commercial purposes plus some extent in industrial uses. Because, the single-phase system is more economical than a three-phase program and the energy requirement in most of the homes, shops, offices are little, which can be easily met by a single phase system.

The single phase AC motors are further classified as:

One phase induction motors or asynchronous motors.

Single phase synchronous motors.

Commutator motors.

The squirrel cage rotor includes aluminum, brass or speed reducer copper bars. These aluminium or copper bars are called rotor conductors and placed in the slot machine games on the periphery of the rotor. The copper or aluminium rings permanently brief the rotor conductors called the end rings.

To provide mechanical power, these rotor conductors are braced to the end ring and therefore form a complete closed circuit resembling a cage and therefore got its name since squirrel cage induction motor. As end rings completely short the bars, the rotor electrical resistance is very small and it is not possible to add external resistance as the bars get completely shorted. The absence of slip ring and brushes make the construction of single phase induction motor very easy and robust.