|
In the process of making high-frequency transformers, winding is inevitable. Today, Xiaobian says its winding process. Among them are (material confirmation, winding method, precautions, lead essentials)
1. Material confirmation
1, 1 bobbin specification confirmation
1, 2 When the unused pin has to be cut, it should be cut off before the wire is wound, in case the wire is cut or the wrong foot is cut when the wire is cut off, and the wrong foot can be avoided when winding. .
1, 3 confirm that Bobbin is complete, no damage and cracks
1, 4 Insert Bobbin correctly into the fixture, generally marked as 1 foot (beveled by pin 1). If the drawing is not indicated, then 1 foot is facing the machine.
1, 5 must be wrapped in acetic acid cloth according to the requirements of the engineering drawings, close to the sides of Bobbin, and then wrap the line on the specified Pin (or first hook line) and start winding, in principle, the winding should be specified Winding within the range.
2, winding method
According to the requirements of high-frequency transformers, the way of winding can be roughly divided into the following
2, 1 layer of close winding: wiring only occupies one layer, there is a gap between the tight line and the line, neat winding
2, 2 Equal winding: Winding at equal intervals within the winding range, the interval error can be accepted within 20%.
2, 3 multi-layer dense winding, can not be wound in one winding layer, must be wound to the second layer or more than two layers, some winding methods are divided into three cases a, arbitrary winding: neatly arranged to a certain extent, to reach the most In the upper layer, the wiring is disordered and uneven, which is the roughest winding method in the winding. b. The whole column is closely wound: almost all the wirings are neatly arranged, but there are a number of wirings that are disorderly (about 30% of the total, and about 5% of the number of turns) c. Completely arranged and wounded: winding to the uppermost layer It is disorderly, and the windings are arranged neatly. This is the most difficult winding method in the winding.
2, 4 positioning winding: wiring is specified in a fixed position, generally divided into five kinds of cases (closely winding around the specified point, evenly winding the specified point winding, densely winding the specified side winding, dense winding, dense winding specified Side winding)
2, 5 and wrap: two or more WIREs are equally rounded around the same set of lines, each of which is parallel winding, can not be crossed, this winding method can be roughly divided into four cases (the same group and around, different groups or the same group and around , multiple groups and around, different groups or the same group double and wrap)
3, note:
3, 1 When the winding and ending lines are on the same side of Bobbin, a traverse tape must be attached for isolation before the end line is returned.
3, 2 When the access line is in the groove of Bobbin, in principle, the line is made by one line and one groove. If there are multiple sets of the same pin, the same groove or adjacent groove can be used, only in soldering and casing. Be careful to avoid short circuits.
3, 3 When winding, it is necessary to evenly and completely round the Bobbin winding area. Except when there is a special regulation on the engineering drawing, the drawing is subject to the drawing.
3, 4 When the transformer has a Teflon casing and there is a folding line, the Teflon casing to be added to the inlet and outlet lines must be flush with the Bobbin groove, and the wire should be taken out from the Bobbin groove to prevent the casing from being too long. Tear off the line. However, if the Pin is wrapped horizontally, the sleeve should be flush with the Bobbin edge.
3, 5 When the acetate cloth is added as the barrier wall tape in the transformer, the wall strip must be close to the two sides of the model. When the line package is too fat and the leakage inductance is too high, it is required that the overlap of the acetate cloth above 2TS should not exceed 5MM. The acetate cloth wrapped in a circle only needs to pack 0.9T, leaving a gap to facilitate the good penetration of the water into the bottom layer. The width of the acetate cloth is related to the safety requirements of the transformer. The width of the VED winding is 3.2mm. Both sides of the package are added with TUBE. :pin end 6mm/4.8mm/4.4mm/4mm.Top end 3mm/2.4mm/2.2mm/2mm When the TUBE winding is not required, the copper wire cannot be on the wall. If there is a casing, the casing must extend into the wall. 3mm or more
4, lead essentials
4.1 Flying lead
4.1.1 Lead wire and length shall be controlled according to the requirements of engineering drawings. If stranded wire is required, the length shall be reserved for 10%.
4.1.2 The casing must be deeper than the retaining wall by more than 3mm
The above is the high-frequency transformer winding process, have you learned?
|