Autotransformers are a type of electrical transformers that use a single winding, rather than separate primary and secondary windings, to transfer electrical energy between different voltage levels. Unlike conventional transformers, autotransformers have only one winding, which is divided into two or more sections by tap connections. This allows the autotransformer to transfer electrical energy from one voltage level to another with a high degree of efficiency and cost-effectiveness.
Autotransformers are commonly used in electrical power transmission and distribution systems, where they serve a variety of purposes, including voltage regulation, impedance matching, interconnecting different voltage systems, power factor correction, and harmonic mitigation.
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