The advantage of transformers is that they allow us to have multiple windings on the primary or secondary side. A transformer with multiple windings is generally called a multiple winding transformer.
The working principle of a multi-winding transformer is no different from that of an ordinary transformer. The calculation of primary and secondary voltage, current, and turns ratio are the same. The difference this time is that we need to pay special attention to the voltage polarity of each coil winding. The point convention indicates the positive (or negative) of the winding. When we connect them When together.
A multi-winding transformer also called a multi-coil or multi-winding transformer contains more than one primary coil or more than one secondary coil on a common laminated core(three-phase voltage regulator). They can be single-phase transformers or three-phase transformers (multi-winding, multi-phase transformers), with the same operation.
Multiple winding transformers can also be used to provide step-up, step-down, or a combination of both between the individual windings. In fact, multiple winding transformers can have multiple secondary windings on the same core, and each secondary winding provides a different voltage or current level output.
Multiple winding transformers have many uses in electrical and electronic circuits. They can be used to provide different secondary voltages to different loads. Combine their windings in series or parallel to provide higher voltage or current, or make their secondary windings in series to create a center-tapped transformer.