Electric motor is a machine that converts electrical energy into mechanical energy, they come in a variety of different types, based on application, power and size. examples are AC Motor, Brushed DC Motors, Brushless DC Motors, Synchronous motors, Stepper Motors. All are used in many application such as transport, heating and ventilation, industrial, positioning applications (motion-controlled), lasers and optics, image scanners, intelligent lighting, and, most recently, 3-D printers.