![]() The voltage at this point will be less than the input AC mains voltage by 24 volts.Measure the voltage across the free ends of the two windings.Apply AC mains voltage to this connection and to the free end of the primary winding.Take the help of the diagram and connect the lower end of the primary winding to the upper end of the secondary winding to form an auto transformer.The procedure of conversion is as follows: Interesting things start to happen when one end of the primary winding is connected to one of the two ends of the secondary winding as shown in the diagram. As in the case of any other transformer, it will consist of a primary input and a secondary step down winding. As it should be able to handle power up to 100 watts, a 5 ampere current rating becomes imperative. Understanding Auto Transformers through this simple ExperimentĪn ordinary 0-24 volts/ 5 amps transformer, can easily be converted into an auto transformer. In more sophisticated auto transformers the output voltage can be varied continuously, right from zero to much higher voltages than the input supply voltage. These outputs may be arranged in steps, starting from voltages less than the input AC mains voltage and ending with voltages higher than the input voltages. What are Auto Transformersīasically, auto transformers consist of a long single winding over an iron core with a single input and multiple outputs. These devices can be effectively used to step-up or step-down our AC mains voltage manually whenever required. In this article we will learn how to design an autotransformer through simple manipulations of ordinary transformers and get them converted into auto transformers. We have studied how an AC mains voltage applied to the primary winding of a transformer is magnetically induced to its secondary winding. We have already received some good knowledge regarding transformers in a couple of previous articles here in Bright Hub. ![]()
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