Simply a DC Motor is a device which convert electrical energy into mechanical energy. A DC motor is a mechanically commutative electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore the current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees, which generates the maximum torque.
DC motors have a rotating armature winding (winding in which a voltage is induced) but non-rotating armature magnetic field and a static field winding (winding that produce the main magnetic flux) or permanent magnet. Different connections of the field and armature winding provide different inherent speed/torque regulation characteristics. Its operation is based on simple electromagnetism. A current-carrying conductor generates a magnetic field, when this is then placed in an external magnetic field,it will experience a force proportional to the current in the conductor, and to the strength of the external magnetic field. Now using the same principle lets see how to make a simple DC Motor using household Items.
- Insulated Copper Wire
- Round Magnet
- Safety Pins
- Electrician Tape
Step 1: Use insulated copper wire to make coil as shown in figure. it must be made in such a way that two ends of wire can be used as two terminals.
Step 2: Use electrician tape to bind safety pins in both sides of battery.
Step 3: Now place coil as shown in figure. We must ensure that current is passing through the coil. For the working of motor current must pass through coil.
Step 4: Now place the magnet just below the coil and your motor will start working (watch video to see working).