what is auto transformer

An auto transformer is a type of electrical transformer that has only one winding and utilizes a part of the winding as both the primary and secondary winding. This results in a more compact and lighter design compared to traditional transformers. Auto transformers are commonly used for voltage regulation, phase splitting, and impedance matching in various electrical systems. By providing a more cost-effective and efficient solution for voltage regulation, auto transformers offer significant advantages for applications in power transmission and distribution, as well as in industrial and commercial settings. They are also used in audio systems, where they can be employed to match the impedance of different audio components for improved sound quality. With their compact design and versatility, auto transformers play a crucial role in maintaining stable power supply and efficient energy transfer in a wide range of electrical and electronic systems.