">FLYBACK TRANSFORMER
power transformer toroidal transformer voltage transformer
The flyback circuit utilizes the "flyback" action of an inductor or
flyback transformer to convert the input voltage and current to the
desired output voltage and current. A modern flyback transformer and
circuit design can now permit use in excess of 300 watts of power, but
most applications are less than 50 watts. A flyback transformer first
saves energy received from the input power supply (charging portion of
a cycle) and then transfers energy (discharge portion of a cycle) to
the output, usually a storage capacitor with a load connected across
its terminals. A modern flyback transformer is operated at high
frequency hence gapped ferrite core materials are typically used.
You can find a flyback transformer in all sorts of screens and monitors
which require a cathode ray tube (CRT) including television screens and
computer monitors. The flyback transformer has many purposes - the
creation of the acceleration voltage for the CRT (typically 20-30kV),
and of many auxiliary voltages.
The most basic flyback transformer enables current to flow either
in its primary, or in its secondary but it cannot do both at the same
moment. A flyback transformer 's magnetic circuit reluctance is
normally much greater than for a regular transformer. This is due to
what is called an inductor that is a strategically calculated air gap
for storing energy.
The differences between a regular and flyback transformer are many but
that main one lies in the fact that a flyback transformer is that its
magnetic circuit is made to store energy as it works like a pure
inductor. On the other hand, a normal transformer was created to shift
energy from a primary source to a secondary one and to reduce stored
energy to a minimum.
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