The working principle of autotransformer

An autotransformer is the output and input share a set of coils of special transformers boost and buck with different tap to achieve. Fewer parts than a shared coil tap voltage is reduced. Than the more common part of the coil tap voltage rises 2 in fact, the same principles and commonmcb circuit breaker, but his primary coil is its `` `secondary coil of the transformer is generally left a primary coil through electromagnetic induction, so that the right side of the secondary coil generates a voltage `` autotransformer is affect their own `` three electric meter is only one winding of the transformer, when used as a step-down transformer, extracted from a part of the winding turns as the secondary winding; when used as a step-up transformer is used, the applied voltage is only applied to the winding - part turns on. Usually belong to that part of the primary and Voltage stabilizer is called the common winding, and the remaining part is called the series winding, with the capacity of self-coupling transformer and ordinary transformer, not only small size, and high efficiency, and the greater the capacity of the transformer, The higher the voltage. This advantage will become even more prominent. So with the development of the power system, voltage levels to improve and increase the transmission capacity, self-coupling transformer because of its large capacity, low loss, low cost and widely used.