This is called the “center tap” and this thing allows the transformer to provide two separate output voltages which are equal in magnitude, but opposite in polarity to each other.
The wire is adjusted such that it falls in the exact middle point of the secondary winding and is thus at zero volts, forming the neutral point for the winding. When an additional wire is connected across the exact middle point of the secondary winding of a transformer, it is called a center tapped transformer. In this way an alternating current also flows through the two halves of the secondary winding of the transformer and flows to the external circuit. The internal process is the same, which is when an alternating current is supplied to the primary winding of the transformer it creates a magnetic flux in the core, and when the secondary winding is brought near, an alternating magnetic flux is also induced in the secondary winding as the flux flows through the ferromagnetic iron core and changes its direction with each and every cycle of the alternating current. The difference lies in just the fact that its secondary winding is divided into two parts, so two individual voltages can be acquired across the two line ends. Don’t forget you can send your own articles, works, reviews or tutorials just send us a mail! Working Principle of a Centre Tapped TransformerĪ Centre Tapped transformer works in more or less the same way as a usual transformer.
Here’s the 6th part Nasir’s tutorial on transformers.
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