Applications Fans Blowers Machine tools (drill) Appliances (blender, food processor) Wristwatches Disk drives Pumps Etc.

How it works Simply put, an electric motor converts electrical energy into mechanical energy (work) They operate through interacting magnetic fields and current-carrying conductors to produce a force (This might sound familiar)

Parts of a Permanent-magnet motor Battery Magnet Brush Armature

Brushed DC motor Oscillating current in wound rotor Split-ring commutator Wound or permanent magnet stator Limitations – friction as brushes press against communtator – sparks can cause shorting through adjacent sections (limits max speed, as melting of the commutator may occur)

LHR for the motor principle

Time to motor Motors are easy to make, so let’s try! Check out the following simple designs and try to identify the parts Make sure the force on your coil agrees with LHR