Three-dimensional laminated iron core yoke column equal-flux-density structure and method

Abstract

The invention discloses a three-dimensional laminated iron core yoke column equal flux density structure and method. The structure comprises a three-frame iron core, an upper yoke, a lower yoke and acore column. According to a selected transformer capacity sheet type, the sheet type of the upper yoke part and the lower yoke part of each frame of the three-frame iron core is widened, and the number of iron core laminations of the yoke parts of the iron core is increased; the sectional area of the lower yoke of the iron core is increased. The method comprises the following steps that: the sheettypes of the upper and lower yoke parts of each frame of the three-frame iron core are widened, so that yoke flux density can be decreased; the widths of the upper yoke pieces of the iron cores at all levels are gradually adjusted according to an actual proportion parameter 1.153; iron core foot pads are installed at the grounding parts of the lower iron yokes of the iron cores, so that the sectional area of the iron yokes is increased, and therefore, the levelness and flatness of the lower end faces of the iron yokes are guaranteed; at least one of the two ends of each joint position of ironcore columns and the iron yokes is of a unilateral oblique angle and right angle combined structure. According to the three-dimensional laminated iron core yoke column equal flux density structure and method of the invention, the flux density selection of a transformer is equivalent to the equal-flux-density selection of the column yokes; and a no-load loss value generated by each part of the yoke columns does not need to be calculated separately during no-load loss value calculation, and therefore, the complexity of no-load loss calculation is reduced.

Description

technical field [0001] The invention relates to an iron core structure, in particular to a magnetic density structure and method such as a three-dimensional stacked iron core yoke column. Background technique [0002] The three-dimensional stacked iron core is an improved structure of the three-dimensional wound iron core, which can reduce the technical performance requirements in the product manufacturing process under the premise of satisfying all the performances of the three-dimensional wound iron core. The three-dimensional laminated iron core is completely symmetrical in space, and it is easier to guarantee various electromagnetic parameters than the planar laminated iron core products. This kind of iron core has the characteristics of material saving and energy saving, symmetrical three-phase magnetic circuit, small exciting current, low no-load loss, small harmonic and low noise. [0003] Such as figure 1 , 2 As shown in the analysis of the magnetic circuit of the...

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Problems solved by technology

[0006] In view of the three-dimensional stacked iron core structure in the prior art that strictly limits the selection of transformer magnetic density, resulting in the closing current exceeding the rated no-load current and causing damage to the transformer, the problem to be solved by the present invention is to provide a method that can reduce the space Complicated calculation of load loss, three-dimensional laminated iron core yoke columns and other magnetic density structures and methods to ensure the short-circuit resistance of the product

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