Three phase three columns of amorphous alloy structure and performance analysis of dry type transfor

      Amorphous alloy dry type transformer is made of new type of magnetic material (amorphous alloy) new energy saving transformer core. Than the silicon steel sheet was used as core transformer no-load loss fell by more than 70%, no-load current fell by about 80%, energy saving effect is the ideal distribution transformer, especially suitable for rural power grids and developing regions such as load rate is low.

      Amorphous alloy epoxy pouring of dry type transformer winding and clamping device materials and ordinary epoxy pouring dry type transformer basic same, but the chosen core material has the very big difference, choose a known as a new high technology of amorphous alloy products. Amorphous alloy is a thickness of 0.03 mm or so thin magnetic materials. It is a percentage of the alloy material is made of super quenching technology (cooling speed is 107 ℃ / s), after cooling buoy, a strip of the chip. 

      Compared with the cold rolled silicon steel sheet, amorphous alloy material has the advantages of five aspects, but also have shortcomings in five aspects. These weaknesses to transformer design and manufacturing has brought many difficulties.

      Advantage is embodied in five aspects: (1) the isotropic soft magnetic materials; (2) the loss is very low, about 30% of the silicon steel sheet. (3) the high resistivity, which is about 3 times of the silicon steel sheet; (4) the subsequent process is convenient (subsequent processing magnetic) required to be able to get; (5) good manufacturing environmental protection.

      Drawback is that in five aspects: (1) the thickness is very thin, flat on the surface of the material is not ideal, core filling coefficient of about 0.86; (2) the hardness is greater than the silicon steel sheet, bring inconvenience to the cutting and processing; (3) must be annealing treatment; (4) after annealing material brittle; (5) the influence of mechanical stress on its performance is very big.

      As a result of amorphous alloy strip forming core section made of rectangular, winding is rectangle. In a yoke with fracture, open fracture suit winding, and then closed fracture. Core adopts the new outsourcing of three phase three column structure. Due to the flame retardant flame retardant, high reliability, free maintenance etc, and the dry type amorphous alloy transformer in the distribution market with broad prospects for development.

      Three pillars of amorphous alloy iron core shape as shown in figure 1. Core cross section multiplied by the coefficient of cross section is equal to the core, namely the S1 = k, S, S1 for effective cross section, S for cross section, k for laminated coefficient. Different products of amorphous alloy iron core suppliers, the k value is slightly different, because the filling coefficient of amorphous alloy iron core is low, usually take around 0.86 k values. Core section should consider when selecting control in 1.3 T magnetic flux density, and low in comparison with the core of silicon steel sheet, this is because the saturation flux density of amorphous alloy at 25 ℃ is only 1.55 T, and silicon steel sheet is 2.03 T, and amorphous alloy saturation after loss and fever is very serious, has the potential of sheet direction of magnetization. Core GF is equal to the weight in two boxes and a frame weight. Company development SCBH15-2000/10 product, flux density B = 1.153 T, 0.19 W/kg unit consumption.

       Three column core column is five core lighter in weight, 3-5% in the overall manufacturing costs less working hours, slightly bottom on the no-load loss. Three pillars of amorphous alloy transformer belongs to a new type design, and the five pillars of amorphous alloy transformer belongs to traditional pattern design.