Autotransformer

Product Brief:

An autotransformer is a special transformer in which both the output and input share a set of coils. The boost and drop of pressure are achieved with different taps. The voltage of the taps that are less than the common coil decreases. The voltage of the taps that are more than the common coil increases.

2. In fact, the principle is the same as that of a regular transformer, except that its primary coil is its secondary coil. In a general transformer, the left primary coil generates voltage in the right secondary coil through electromagnetic induction. In an autotransformer, it influences itself.

An autotransformer is a transformer with only one winding. When used as a step-down transformer, a portion of the winding turns are drawn out as the secondary winding. When used as a step-up transformer, the external voltage is only applied to a certain number of turns of the winding. Generally, the part of the winding that belongs to both the primary and secondary windings is called the common winding, and the rest is called the series winding. Compared with ordinary transformers of the same capacity, autotransformers not only have a smaller size but also higher efficiency. Moreover, the larger the capacity of the transformer, the higher the voltage. This advantage becomes even more prominent. Therefore, with the development of the power system, the improvement of voltage levels and the increase of transmission capacity, autotransformers have been widely used due to their large capacity, low loss and low cost.