Sinusoidal ac voltage are available from a variety of sources. The most common source is the typical home outlet, which provides an ac voltage that originates at a power plant. Most power plants are fueled by water power ,oil, gas or nuclear fusion.
In each case ,an ac generator as shown is the primary component in the energy -conversation process. The power to the shaft developed by one of the energy source listed turns a rotor inside a set of windings housed in the stator and induces a voltage across the windings of the stator , as define by faraday's law:
e=ndfai/dt
Through power proper design of the generator a sinusoidal ac voltage is developed that can be transformed to higher levels for distribution through the power lines to the consumer. For isolated locations where power lines have not been installed ,portable ac generators are available that run on gasoline. As in the larger power plants however an ac generator is an integral part of thedesign.
in an effort to conserve our natural resources and reduce pollution wind power, solar energy and fuel cells are receiving increasing interest from various districts of the world that have such energy sources available in level and duration that make the conversation process viable. The turning propellers of the wind power station are connected directly to the shaft of an ac generator to provide the ac voltage described above. Through the light energy absorbed in the from of photons , solar cells can generate dc voltages.
No comments:
Post a Comment