FLYBACK TRANSFORMER |
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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. |
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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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