PEFI 2.20
AC Circuits
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All generators
based at the fact that a current will be introduced when a wire
moved through an electric field.
Depending of the construction of
the generator will eighter an AC or a DC voltage be procuced.
Applets with AC generators:
(Click at the figure for link to Applet)
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Last updated:
09-08-12 |
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More examples
here |
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Why
is AC important? (PEFI page 81) |
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By
sending AC through a Transformer is it possible to
transform the Voltage up and Down.
A
Sinus Voltage will come out of the transformer as a
"new" Sinus Voltage.
Note! - The Circuit Simulator a
little weak at this point and hence will it be possible
to Transform DC as well.
Click
at the figure and study the principles behind our high
Voltage power distrubution system.
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What's behind the AC
outlett in the Wall. |
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The
Power systems in Europe based at 3 Phases of 230V RMS
each.
Please note the maximum value of
the Voltage acually Vmax * sqrt(2) = 220 * 1.414 = 311
Volt
Whats
the Voltage between two Phases ?
If
you connect a symmetric load to the Three phases, how
much current will the flow throug the Null wire?
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What's behind the AC outlett in the Wall. |
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When
a Resistor connected to an AC Voltage will the Current
and the Voltage be proportional (Follow Ohm's law I =
U/R) and hence will the Current and the Voltage be in
Phase.
When a Capacitor (without charge)
connected to an AC Voltage will the Current be at its
maximum when the Voltage at its minimum - Hence the
Current 90 deg before the Voltage.
The
opposite true for an Inductor.
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AC
and Resistors, RMS Voltage and Current - PEFI 2.21 |
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