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Three-dimensional volume compared with the performance of the laminated iron core transformer iron core transformer

by:Transmart     2021-01-14
Three-dimensional volume compared with the performance of the laminated iron core transformer iron core transformer - 2019 03 - 30 15:05:37 three-dimensional volume core compared with laminated iron core, there are three obvious improvement in the structure: laminated improvement for winding; Plane arrangement improvement for solid core column arrangement; Core column cross section shape by ladder shape to the polygon. This makes the three-dimensional volume compared with laminated iron core transformer iron core transformer has five advantages. 1, save material, reduce the cost of the three-dimensional volume than laminated iron core transformer iron core transformer saving material reason is determined by the unique structure of three-dimensional volume core. Three stereo volume core magnetic circuit significantly shorter than the average length of laminated iron core. So the three-dimensional volume core weight lighter than laminated iron core weight obviously, so to save material, reduce the cost. In the same column cross-sectional area, the same high window size, the same core column center distance cases, three dimensional wound core weight 20% lighter than the stack core, the three-dimensional wound core than save 20% silicon steel strip, fold the core core material cost 20% lower. Stereo coil core silicon steel strip when processed into trapezoid strip, suit cut method is used to open, so the cutting without waste, do not waste material. And laminated iron core need Angle of attack in the manufacturing process of silicon steel sheet, rushed down the Angle of material become a waste, cause about 4% of material waste. Three-dimensional volume core core column section assumes the polygon, sectional filling coefficient can reach 0. 95-0. 96, and the laminated core core column section is stepped, sectional filling coefficient is 0. 89-0. 925, under the condition of same cross section, the three-dimensional volume of the core winding turns length by an average of 2% ~ 3%, thus can save 2% ~ 3% copper. 2, improve performance, reduce the loss of the three-dimensional volume than laminated iron core transformer iron core transformer to improve performance, reduce the loss of reason, is by the three-dimensional volume is determined by the structure of the core. Concrete has two aspects: ( 1) Due to the weight of the three-dimensional volume core lighter than laminated iron core is obvious, in the same unit of silicon steel sheet loss and construction process, the three-dimensional volume low no-load loss of iron core is clearly, good performance. The following relation: P0 = P0 & middot; G· K type P0 & ndash; — — No-load loss; p0— — — Loss of silicon steel sheet unit; G— — — Core weight; K— — — Technological factor ( 2) Due to the three-dimensional volume core after annealing treatment, in the process of manufacturing process coefficient is 1. 05 ~ 1. 1 and the laminated core is generally not in the process of manufacturing annealing treatment, process coefficient is 1. 2 to 1. 4. In the same silicon steel belt material, the same core column cross-sectional area, the same high window size, the same core column center distance, three-dimensional volume than laminated iron core transformer iron core transformer no-load loss fell about 30%, 70% ~ 80% drop in no-load current. 3, to reduce the noise laminated iron core is made up of a certain shape silicon steel sheet folding according to certain rule. Between silicon steel sheet is not quite close together, when you are working under the effect of electromagnetic force, vibration, noise is larger. And the three-dimensional volume core is composed of several kinds of trapezoid strip winding in turn, more closely between silicon steel belt, work, little vibration, low noise. Three-dimensional volume than laminated iron core transformer iron core transformer noise low noise 7 ~ 10 db. 4, three-phase balance due to the three laminated iron core transformer core column are arranged plane, such making that the three core columns do not match the length of the magnetic circuit, the magnetic circuit of intermediate core column length is short, two side column magnetic circuit length is longer than the average length of the magnetic circuit in the column by more than 20%, resulting in a greater difference between three core column no-load current, no-load current of stele is small, the no-load current of two side column is larger, three-phase imbalance. Three-dimensional folding iron core of the three core column are arranged an equilateral triangle, the length of the magnetic circuit of the three core column completely consistent, and short, three core column equals the no-load current, three-phase equilibrium.
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