Single Phase Induction Motor Symbol

The slots are not made parallel to each other but are a little bit skewed as the skewing prevents magnetic locking of stator and rotor teeth and makes the working of induction motor more smooth and quieter.

Single phase induction motor symbol. Once started the auxiliary winding is optional. The word pulsating means that the field builds up in one. Single phase induction motors are not self starting without an auxiliary stator winding driven by an out of phase current of near 90. A pulsating magnetic field is produced when the stator winding of the single phase induction motor shown below is energised by a single phase supply.

There are other engines generators that produce electricity by exploiting the mechanical energy such as alternators and dynamos. This symbol represents a single phase ac synchronous motor. Single phase induction motors consist of two main parts. Construction of single phase induction motor.

The construction of these motors is more or less similar to a three phase squirrel cage induction motor. A single phase induction motor consists of a single phase winding which is mounted on the stator of the motor and a cage winding placed on the rotor. Equivalent circuit of a single phase induction motor the equivalent circuit of a single phase induction motor can be obtained by two methods named as the double revolving field theory and cross field theory. Firstly the equivalent circuit is developed on the basis of double revolving field theory when only its main winding is energized.

The auxiliary winding of a permanent split capacitor motor has a capacitor in series with it during starting and running. It is expressed by the percentage of synchronous speed. A single phase induction motor is similar to the three phase squirrel cage induction motor except there is single phase two windings instead of one three phase winding in 3 phase motors mounted on the stator and the cage winding rotor is placed inside the stator which freely rotates with the help of mounted bearings on the motor shaft. Shall have terminal markings as given in mg 1 2 66 for two phase single speed induction motors.

Synchronous motors initially starts as an induction motor but later achieves a synchronous speed which only depends on the input supply frequency. The slip in an induction motor is the difference between the main flux speed and their rotor speed. A combination of capital letters or symbols and an arabic numeral shall be used to indicate the character. The construction of the rotor of the single phase induction motor is similar to the squirrel cage three phase induction motor.

The stator is a stationary part and it has laminated construction which is made up of stampings. The main winding of a single phase motor is designated by t1 t2 t3 and t4 and the auxiliary winding by t5. The rotor is cylindrical and has slots all over its periphery.