Transformer Amorphous Alloy and Silicon Steel Sheet Advantages and Disadvantages
(5) from electrical performance. In order to reduce the shearing amount of the core piece, the core of the whole product is composed of four separate core frames, and each phase winding is set on the two separate walls of the magnetic circuit. The magnetic flux in each box in addition to the fundamental flux, there are three harmonic flux exists, a winding in the two volumes of the core frame, the third harmonic flux in the opposite phase, the value of equal , So that the third harmonic flux vector in each set of windings is zero. Such as the primary side of the D connection, there are three harmonic current loop, when the induced secondary side of the voltage waveform, there will be no third harmonic voltage components
?(3) Amorphous alloys are very sensitive to mechanical stress. Structural design, we must avoid the use of the core as the main bearing structure of the traditional design.
??(4) In order to obtain excellent low loss characteristics, the amorphous alloy core sheet must be annealed.
The use of magnetic properties of the protruding amorphous alloy, used to make the core material of the transformer, and ultimately get a very low loss value. But it has many features that must be ensured and considered in design and manufacturing. The main body is the following aspects:
??(1) amorphous alloy sheet material hardness is very high, with conventional tools is difficult to cut, so the design should consider reducing the amount of shear.
??(2) amorphous alloy monolithic thickness is very thin, the material surface is not very flat, then the core fill factor is low.
Amorphous alloy made of iron core transformer, which than the silicon steel sheet for the core transformer no-load loss (when the transformer secondary open circuit, measured in the primary power loss) decreased by 80%, no-load current (transformer times Class open circuit, the primary still have a certain current, this part of the current known as no-load current) decreased by about 85%, is the energy-saving effect of the ideal distribution transformer, especially for rural power grids and developing regions such as low load The place.
