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Unformatted text preview: 385L - Laboratory 3 - Introduction to Power Supplies Abstract This lab introduces proper operation of diodes for rectification of an AC signal and filtering of those signals. It also provides understanding of the secondary voltage output of a transformer and the use of solid state voltage regulators. Background According to Wikipedia, a transformer is a device that transfers electrical energy from one circuit to another through inductively coupled electrical conductors. A varying current in one circuit generates a similarly varying magnetic field; in turn, this magnetic field induces a changing voltage in the other circuit. When resistance is added to the second circuit, current is forced to flow in the transformer, and energy is transferred from one circuit to the other. The ratio of the induced voltage, V S , to the primary voltage, V P , is related to the ratio of the number of turns in each by the following formula: By making a transformer with more turns in the secondary coil than in the primary, the alternating...
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- Spring '08