1.0INTRODUCTIONAn electric motor converts electrical energy into mechanical energy. Most electric motors operate through interacting magnetic fields and current-carrying conductors to generate force, although a few use electrostatic forces. The reverse process, producing electrical energy from mechanical energy, is done by generators such as an alternator or a dynamo. Many types of electric motors can be run as generators, and vice versa. For example a starter/generator for a gas turbine, or traction motors used on vehicles, often perform both tasks.Electric motors are found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives. They may be powered by direct current (e.g., a battery powered portable device or motor vehicle), or by alternating current from a central electrical distribution grid. The smallest motors may be found in electric wristwatches. Medium-size motors of highly standardized dimensions and characteristics provide convenient mechanical power for industrial uses. The very largest electric motors are used for propulsion of large ships, and for such purposes as pipeline compressors, with ratings in the millions of watts. Electric motors may be classified by the source of electric power, by their internal construction, by their application, or by the type of motion they give.The physical principle of production of mechanical force by the interactions of an electric current and a magnetic field was known as early as 1821. Electric motors of increasing efficiency were constructed throughout the 19th century, but commercial exploitation of electric motors on a large scale required efficient electrical generators and electrical distribution networks.Some devices, such as magnetic solenoids and loudspeakers, although they generate some mechanical power, are not generally referred to as electric motors, and are usually termed actuators and transducers, respectively.2.0OBJECTIVEi.To identify AC and DC motor.ii.To differentiate the components in AC and DC motor.iii.To identify the advantages and disadvantages of both AC and DC motor.Page 1of 13
3.0LITERATURE REVIEWThere are lots of motor that use in electrical system but the most commonly motor that used in electrical system are alternating current or AC and direct current or DC. Basically, the reference of these two motor are refer to the how the electrical current transferred through and from the motor. Based on the name, it is known that these two motor have different function and uses. As for DC motors, it is come in two general types which are brushes and brushless while AC motors also come in two different types. They can be a synchronous motor or induction motor. Below are the details information regarding AC and DC motors.