The Applications of an Auto Transformer - Ningbo Wanji Electronics Science & Technology Co., Ltd.

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The Applications of an Auto Transformer

An auto transformer is an electrical transformer with only one winding.

Auto transformer without make the primary and secondary winding insulated from each other also have applications. Auto transformeris characterized with small size, less materials consumption, highefficiency and other advantages. Common communication (manual rotation)voltage regulator, home regulator within a small transformer, thethree-phase motor starting auto transformers decompression, etc., areall examples of the application of the auto transformer.

The auto transformer prefix refers to the singlecoil rather than any automatic mechanism. In an auto transformerportions of the same winding act as both the primary and secondarywindings.

Auto transformers are frequently used in powerapplications, for example 138 kV to 66 kV for transmission. Anotherapplication of the auto transformer is in industry to adapt machinerybuilt (for example) for 480 V supplies to operate on a 600 V supply.They are also often used for providing conversions between the twocommon domestic mains voltage bands in the world (100-130 and 200-250).The links between the UK 400 kV and 275 kV super grid networks arenormally three phase auto transformers with taps at the common neutralend.

In audio applications, tapped auto transformers are used to adaptspeakers to constant-voltage audio distribution systems, and forimpedance matching such as between a low-impedance microphone and ahigh-impedance amplifier input.

The above is the brief introduction of the auto transformers, maybe there are any other usages of it need to be found

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