World of Electric generators      

Applied Physics

Niko Puhakka

Matti Levo

3.12.2014

First electric generator

In short, in the presence of an electromagnetic field a current can move a wire and a wire movement can generate a current.

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• Direct current

• homopolar generator

• MDH generator

• Alternating current

• induction generator

• linear alternator generator

• variable speed constant frequency generators

Equivalent circuit

An equivalent circuit of a generator and load is shown in the diagram below. The generator is represented by an abstract generator consisting of an ideal voltage source and a internal resistance. The generator's Vg and Rg parameters can be determined by measuring the winding resistance, and measuring the open-circuit and loaded voltage for a defined current load.

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Picture 1: Equivalent circuit of generator

Where do you use generators?

You use them in the process to transform different forms of energy in to electrical energy. Basically every power plant has a generator for converting the form of energy.

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Picture 3: General layout of electricity network: how the power plants are connected to the electric power grid.

How do light and matter interact when considering generators?

Understanding the meaning of light:

Light interacts with matter in 4 ways: emission, absorption, transmission and reflection or scattering.The interaction between light and matter determines the appearance of everything around us.

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Picture 4: How light and matter interact in basic dynamo generator

Solar power and light

Good example about how light and matter interact in our case is the solar power generator. Solar (or photovoltaic) cells convert the sun’s energy into electricity. Whether they’re adorning your calculator or orbiting our planet on satellites, they rely on the the photoelectric effect: the ability of matter to emit electrons when a light is shone on it.

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