Electric Motors

An electric motor is a device using electrical energy to produce mechanical energy, nearly always by the interaction of magnetic fields and current-carrying conductors. The reverse process, which uses mechanical energy to produce electrical energy, is accomplished by a generator or dynamo. Traction motors used on vehicles often perform both tasks. in principle, all electric motors may be operated by direct current from a battery in a portable device or motor vehicle, or from alternating current from a central electrical distributing grid.