Oil Immersed Transformer Rectification Method

We may have heard about the concept of a rectifier circuit. The ability of this circuit is to convert an AC circuit into a form of DC power. In oil-immersed transformers, rectification is usually required to complete the output of direct current. In this process, the rectifier bridge is essential. The current advantage of half-wave rectification is that the circuit is simple and only one rectifier is used. The disadvantage is that the output DC voltage is low, the ripple is large, and because the DC flows through the secondary winding of the transformer, the ratio of the volt-ampere value of the rectifier transformer to the DC power is large.

The ripple factor of the full-wave rectifier circuit is lower than that of the half-wave rectifier, the ratio of the volt-ampere value to the DC power of the oil-immersed transformer is smaller than that of the half-wave, and the DC magnetization is basically negligible. The disadvantage is that the secondary of the oil-immersed transformer needs to add a center tap, and the utilization factor of the oil-immersed transformer is not as high as that of the single-phase bridge circuit. The transformer of the bridge rectifier circuit is simple to manufacture and has a high utilization factor. The reverse voltage of the rectifier tube is half lower than that of the full-wave circuit, and there is no DC magnetization. The disadvantage is that a large number of rectifier elements are used. Bridge rectifier circuits are the most widely used and the most common in rectifier circuits.