The motor

The motor in the hair dryer is a direct current motor. The motor consists of a stator and a rotor and has the following principle of working:
- Contradictory poles attract each other
- Identical poles reject each other
That resulted in a rotating movement

We also need a AC-DC converter to convert a alternating current to a direct current. That happens with a bridge rectifier, which consists of 4 diodes.

The current always flows in only one direction through the resistor

     

           

                                                                    Alternating current

                                                              

Direct current