Classification of transformer core

Commonly used transformer core are generally made with silicon steel sheet. Silicon steel is a kind of containing silicon ( Silicon is also called silicon) 8%. Made transformer silicon steel core, because itself is a kind of silicon steel permeability ability very strong magnetic materials, in the current coil, it can produce larger magnetic induction intensity, which can make the volume of a transformer. Core is mainly composed of iron core ontology, fasteners and insulating parts: (1) core ontology, magnetic conductor, made of the electrical steel piece. (2) fasteners, clamp, screw, glass tie belt, just tie belt and block, etc. (3) of the clip and insulation insulation, insulation pipe and insulation pads, ground lug and shoes, etc. The transformer core can be divided into ( 1) Shell and core type iron core: the core medium a winding part is called the 'column', not only set of winding up the role of magnetic circuit part is called 'yokes of iron. All core surrounded the winding is called a shell; Every winding around the column called core type. Shell and core type have distinguishing feature each, but the iron core is determined by the transformer manufacturing technology have great difference, once selected with a certain structure is difficult to produce a kind of structure. In our country mostly transformer core adopts pile core type. ( 2) Core: single-phase and three-phase single-phase core has a single fold two pillar type iron core. Yoke type four pillars near the core of single-phase single, single phase double column type folding iron core, single-phase radiant folding iron core, a total of five kinds of; Three-phase core has three phase column type core stack, next to the three-phase yoke type column five core, three-phase double box type folding iron core, three-phase reactor folding iron core is a total of four. ( 3) Vertical and plane type: the heart of a vertical column and iron yoke is not in a plane, a radiant and involute type, symmetrical type, due to the magnetic flux distribution is evener, can reduce the damage of consumption; Flat heart column and an iron yoke on the same plane, high mechanical strength, good manufacturability. ( 4) Fold the core and core: generally are folded iron core, the iron core is piled up. More in the form of roll core. Involute column and iron yoke iron core heart between the air gap is bigger, affect the no-load current, so the capacity can't be too small; But due to the magnetic flux leakage vertically into iron chip plane, affect the additional loss, so shoulds not be too wide, which can't be too much capacity.
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