MAPPING YOUR MIND 2.4 Applications Electricity in use Electric motors Main uses Components Residential Stator Industrial Rotor Transportation Armature Commercial Types of electric motors Process In buildings Main elements Utility pole Service pole/cable Cut-out device Main fuse Meter Hot/live wire Neutral wire With earth wire Current is applied to rotor AC motors Asynchronous Speed of rotor lower than rotating magnetic field Types Single-phase Three-phase Wire becomes magnet Magnet rotates between permanent magnet Rotation creates torque Torque spins shaft Mechanical energy is created Types Lighting Synchronous Speed of rotor same as rotating magnetic field DC motors Types Brushed Brushless Stepper motor DC motor Needs a commutator May need brushes or electronic circuits High starting torque Controllable speed and precision AC motor Current automatically reverses Constant speed Types of bulbs Incandescent Halogen Compact Fluorescent Lightbulbs LED OLED