Electric Machines (E ...

Electric machines is an important device in modern life that can convert either mechanical energy to electrical energy or electrical energy to mechanical energy. When such a device is used to covert mechanical energy to electrical energy, it is called a generator. When it converts electrical energy to mechanical energy, it is called motor. Since any given electrical machine can convert power in either direction, any machine can be used as either a generator or a motor. Almost all practical motors and generators convert energy from one form to another through the action of a
magnetic field. The transformer is an electrical device that is closely related to electrical machines. It converts ac electrical energy at one voltage level to ac electrical energy at another voltage level.