河北铁芯厂

变压器非晶合金结构特点

Characteristics of amorphous alloy structure of transformer

利用导磁性能突出的非晶合金，来用作制造变压器的铁芯材料，最终能获得很低的损耗值。但它具有许多特性，在设计和制造中是必须保证和考虑的。主要体体现以下几个方面：

The amorphous alloy with high magnetic conductivity is used as the iron core material for the transformer, and the loss value can be obtained at the end. But it has many characteristics, which must be guaranteed and considered in the design and manufacture. The main body embodies the following aspects:

(1)非晶合金单片厚度极薄，材料表面也不是很平坦，则铁芯填充系数较低。

(1) the thickness of the amorphous alloy is extremely thin, and the surface of the material is not very flat, and the core filling coefficient is low.

(2)非晶合金片材料的硬度很高，用常规工具是难以剪切的，所以设计时应考虑减少剪切量。

(2) the hardness of amorphous alloy sheet material is very high, it is difficult to cut with conventional tools, so it should be considered to reduce the shear amount in the design.

(3)为了获得优良的低损耗特性，非晶合金铁芯片必须进行退火处理。

(3) in order to obtain excellent low loss characteristics, the amorphous alloy iron chips must be annealed.

(4)从电气性能上。为了减少铁芯片的剪切量，整台产品的铁芯由四个单独的铁心框并列组成，并且每相绕组是套在磁路独立的两框上。每个框内的磁通除基波磁通外，还有三次谐波磁通的存在，一个绕组中的两个卷铁芯框内，其三次谐波磁通正好在相位上相反，数值上相等，因此，每一组绕组内的三次谐波磁通向量和为零。如一次侧是D接法，有三次谐波电流的回路，当在感应出的二次侧电压波形上，就不会有三次谐波电压的分量。

(4) from the electrical performance. In order to reduce the cutting amount of the iron chip, the core of the whole product is composed of four separate core frames, and each phase winding is set on the two independent magnetic circuit. The flux within each frame in addition to the three fundamental magnetic flux, and the harmonic magnetic flux exists, a winding of the two roll core box, third harmonic flux is opposite in phase, value equal, therefore, each set of windings in the three harmonic flux vector and zero. If one side is D connection, there are three harmonic current circuits, and there will be no three harmonic voltage components when the two side voltage waves are induced.

(5)非晶合金对机械应力非常敏感。结构设计时，必须避免采用以铁芯作为主承重结构件的传统设计方案。

(5) amorphous alloy is very sensitive to mechanical stress. When the structure is designed, it is necessary to avoid the traditional design scheme with iron core as the main load-bearing structure.

根据上面分析，三相非晶合金配电变压器最合理的结构为：铁芯，由四个单独铁芯框在同一平面内组成三相五柱式，必须经退火处理，并带有交叉铁轭接缝，截面形状呈长方形。绕组，为长方形截面，可单独绕制成型的，双层或多层矩形层式。油箱，为全密封免维护的波纹结构。

According to the above analysis, the most reasonable structure of the three-phase amorphous alloy distribution transformer is: the iron core is made up of four single core frames in the same plane, which is composed of three phases and five columns. It must be annealed and intersected with a cross yoke, and the section shape is rectangular. Winding, which is a rectangular section, can be formed separately, double or multi layer rectangular layer. The tank is a fully sealed and maintenance free corrugated structure.