How to Single phase inducton motor work:details with classification|electricaltechguru

Single phase induction motor

In single phase motor motor cannot be self start with one phase that's why we need to gaenerate another phase which is different in angle of  minimum 90०.so the the different arrangements are there by which we can run these motor by doing its self start.so different type are as follows.

Related post: Three phase induction motor

Types of single phase inducton motor

1. Split phase Induction motor.
2. Capacitor start Induction motor.
3. Capacitor start capacitor run Induction motor.
4. Shaded pole Induction motor.

1.Split phase Induction motor

In split phase induction motor,two winding are there.one winding inductive in nature and another is resistive in nature.

Working principle:

When we supply to the these motor main winding (inductive) creats one types of magnetic flux.and the same auxillary winding create a another flux which is having some angle between main winding fluX and resistive winding.
In resistance split phase motor the phase difference between main winding and auxillary winding is about 50 to 60 degree.
According to Faraday's law of electromagnetic induction these fluxes link with rotor winding and rotor creats its own fluxes.which link with stator winding flux and force on rotor exerted and rotor start to rotate with a one direction according to lenzs law.

2.capacitor start inducton motor

In capacitor start motor main winding and auxillary winding are there.main winding connected to mains supply directly and auxillary winding connected to mains with putting capacitor in series.

Capacitor create a 90 degree phase displacement.

Working principle:

When we supply to the these motor main winding (inductive) creats one types of magnetic flux.and the same auxillary winding create a another fluxes which is having some angle with about 90 degree phase difference  with mains.
That's why two phases are created, field theory is getting fulfill here and that's why rotor starts rotating.

Related post:Working principle of transformer

3.Capacitor start capacitor run inducton motor

In this type same as a capacitor start motor,o ly difference is that here two capacitor used.running capacitor is used with

Starting capacitor is used in this type, Which is increased motor starting torque of motor

Working principle:

When we supply to the these motor main winding (inductive) creats one types of rotating flux.and the same auxillary winding create a another fluxes which is having some angle with 90 degree with mains.
That's why two phases are created due to capacitor, field revolution theory is getting fulfill here and that's why rotor starts rotating.

4.shaded pole Induction motor

In this type of motor salient pole stator is used which is main pole divided into two,main pole is divided into two poles one main and others shaded part on which copper shaded ring is mounted,the shaded ring use is short circuit ed that will decide the direction of shaded pole Induction motor. these motor is used copper shaded ring that's why  called shaded pole Induction motor.
Rotor of shaded pole Induction motor is squerrel cage rotor.

Working principle:

When we energies the main winding main pole flux produce, also copper shaded ring produced its own flux.this is additive to main fluxes.the phase difference between main pole and shaded ring is about 40 to 50 degree. Thes fluxes link with rotor and rotor produce its flux according to Faraday's law of electromagnetic induction.and rotor is forced to move to one direction.

Remember: direction of shaded pole Induction motor is from unshaded to shaded region.