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A 'tap' is a connection made part-way along the length of a transformer's winding. In the case of a standard North American distribution transformer, the 240-V secondary winding is centre tapped and earthed, providing both a 240-V (across the entire secondary) and a pair of 120-V (between each end, and the centre tap) supplies to a building.
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What is the difference between an ordinary transformer and a center-tapped transformer?
An ordinary transformer has two input/output terminals but a center tapped transformer has 2 input and 3 output terminals. One is taken from the center for a ground connection. This causes it to get 50% of the actual value. And ordinary transformer contains 2 windings. An autotransformer has one.
What is a multiple secondary transformer and why is it used?
One example would be for a vacuum tube, which uses two secondaries: one of low voltage to heat the filament, one of high voltage to cause thermionic emission.AnswerYou are probably referring to a multiple-tapped secondary, rather than a multiple-secondary (which implies several secondary windings). Multiple-tapped secondaries are used whenever you want a range of different secondary voltages -as per the example in the first answer.
Why transformer does not rotate when its secondary is connected to bearing?
How do you connect the transformer's secondary to the bearings.
How does a buck-boost transformer work?
A Buck Boost transformer is an auto transformer with a small primary to secondary voltage difference. It effectively adds or subtracts a few windings to the secondary to increase or decrease voltage. Here is an example: Say I have a 110 v and want 120 v; I have an auto transformer with 120 windings, tapped at 110 and 120. If I connect the 110 connection to my incoming 110v line, the voltage at the 120 tap will be 120v.
Why am you losing half the voltage when rectifying secondary side of center-tapped transformer to DC via two 1n4007 diodes?
I think the answer is: if you input voltage to a grounded center-tapped secondary transformer winding, only 1/2 the voltage is applied to each rectifier at a time (sine wave), therefore the rectified voltage measured would be 1/2 that of the total voltage. The peak voltage would be 1.4 x RMS. Hope this helps.
