(1) Convenient transportation and installation. The autotransformer is smaller in size and lighter than the double-winding transformer of the same capacity, so the footprint is also smaller.
(2) Less loss and high efficiency. At the same current and flux density, the copper loss and iron loss of the autotransformer are reduced compared to the two-winding transformer, so the benefit is high.
(3) Improve the ultimate manufacturing capacity of the transformer. The limit manufacturing capacity is limited by the transportation conditions. Under the same transportation conditions, the autotransformer capacity can be made larger than the double winding transformer under the same transportation conditions.
(4) Low consumables and low cost. The amount of silicon steel sheet and copper wire used in the transformer is related to the rated current and induced potential of the winding, and also to the capacity. The capacity of the autotransformer winding is reduced, the consumed material is also reduced, and the cost is also low.
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