The Advantages and Disadvantages Of The Amorphous Alloy Dry Type Transformer

The supplies utilized to make the winding and clamping devices of the amorphous alloy dry type transformer is basically the same as these used in the frequent epoxy solid dry-type transformer. However, the supplies used to make the iron cores of both transformers are of great difference. The former one has adopted a new high-tech product called the amorphous alloy.

The amorphous alloy is a thin magnetic materials with a thickness of only about 0.03mm. It’s made by utilizing the ultra-fast cooling technology to cast the alloy material with a sure proportion into ribbon chips by way of the cooling float bowl. Compared with the cold-rolled silicon steel sheet, the amorphous alloy material has 5 advantages but also has 5 disadvantages, which carry many difficulties to the design and manufacture of all types of distribution transformers.

Five advantages:

(1) Isotropic soft magnetic materials;

(2) Low loss, about 30% of that of the silicon metal sheet;

(3) High electrical resistivity, about three times of that of the silicon steel sheet;

(4) Handy subsequent processing (subsequent processing can get the required magnetism);

(5) The manufacturing process is environmentally friendly.

5 disadvantages:

(1) It is extremely thin. The surface of the material shouldn’t be ideally smooth, and the filling coefficient of the iron core is about 0.86;

(2) Its hardness is much higher than that of the silicon metal sheet, which brings inconvenience to reducing and processing;

(three) It should receive annealing treatment;

(four) The material is fragile after annealing;

(5) Mechanical stress has an amazing influence on its performance.

Advantages of Amorphous Metal Transformers (AMT) Lower no-load loss. Because the no-load loss is decrease, the temperature rise of transformer is lower. Better harmonic wave tolerances. Potential for decrease total price of ownership.

Its high permeability adds to its supreme combination for use in high frequency transformers and adjustable inductors. In actual fact, the high magnetic permeability alongside with with a low electrical conductivity of ferrites helps within the prevention of eddy currents.

The cores of standard transformers consist of stacks of laminations which can be made from silicon metal with an almost uniform crystalline structure (CRGO). In transformers with amorphous cores, a ribbon of metal is wound to form the core.

As the scores are elevated stepped or multi-stepped cores are wantred, which improve mechanical stability, reduce the size of mean turn and end in copper savings besides rising efficiency and improving regulation.