What Is Autotransformer And Explain How Current Flows In Windings Presentation

Introduction to Autotransformer
An autotransformer is a type of electrical transformer that consists of a single winding. It differs from a conventional transformer as it has a common portion for both primary and secondary windings. Autotransformers are used to step up or step down voltage levels in electrical systems.	Image Source
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Construction of Autotransformer
Autotransformers have three terminals: one common terminal and two additional terminals. The common portion of the winding acts as both the primary and secondary winding. The additional terminals are connected to different points along the winding to achieve the desired voltage ratio.	Image Source
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Voltage and Current Flow in Autotransformer
The primary voltage is applied across the common terminal and one of the additional terminals. The secondary voltage is obtained between the common terminal and the other additional terminal. The voltage ratio is determined by the ratio of the number of turns between the common terminal and each additional terminal.	Image Source
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Current Flow in Autotransformer
The primary current flows through the winding from the common terminal to the additional terminal. Part of the primary current also flows through the common portion of the winding, providing the required current for the secondary winding. The secondary current flows through the common portion of the winding in the opposite direction to the primary current.	Image Source
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Advantages of Autotransformers
Autotransformers are more efficient compared to conventional transformers as they have fewer windings. They are compact and lightweight, making them suitable for applications where space is limited. Autotransformers provide a smooth and continuous voltage regulation due to the variable voltage ratio.	Image Source
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Disadvantages of Autotransformers
Autotransformers do not provide electrical isolation between the primary and secondary windings. Faults in the winding can lead to a direct short circuit between the primary and secondary sides. The voltage across the common terminal and one of the additional terminals is limited to the voltage rating of the winding.	Image Source
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Applications of Autotransformers
Autotransformers are commonly used in power distribution systems to step up or step down voltage levels. They are also used in variable voltage regulators, where a continuously adjustable output voltage is required. Autotransformers are used in electronic devices and appliances to adapt the voltage levels to match the requirements.	Image Source
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Summary
Autotransformers have a single winding with a common portion for both primary and secondary windings. Voltage ratio is achieved by connecting the additional terminals to different points along the winding. Current flows through the winding from the common terminal to the additional terminal for both primary and secondary windings.	Image Source
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Questions and Answers
Open the floor for any questions or clarifications regarding autotransformers and current flow in windings. Your second bullet Your third bullet	Image Source
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References (download PPTX file for details)
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