What Is the Working Principle of an Auto Transformer? A Quick Overview
 
  Few devices are as important as the autotransformer when it comes to efficient and compact voltage regulation. Unlike traditional two-winding transformers, an autotransformer uses a single, continuous winding to transfer electrical energy between circuits. This design makes it lighter, smaller, and often more economical—a crucial factor in industries where space and cost matter.  In this article, we’ll break down the working principle of an auto transformer , explore its key features, and understand why it's a preferred choice in many electrical applications.   What Is an Auto Transformer?  An auto transformer is a type of electrical transformer with only one winding. This winding acts simultaneously as both the primary and the secondary winding. Part of the winding is common to both sides, which makes it different from a conventional transformer where primary and secondary are separate.  Auto transformers are widely used for applications like:    Voltage regulation    Start...
 
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