Ring transformer winding coil method:
1, the first winding primary winding, take and the original wire diameter similar to the high quality and high strength enameled wire, double line and winding in the "work" shaped wire shuttle, the number of laps to meet the requirements of the cut.
2, the double wire head with double-sided adhesive on the outer circumference of the ring-shaped core, so that the wire shuttle in the ring-shaped core of the inner hole through the winding.
3, a layer of coil winding, brush a layer of insulating varnish (conducive to the positioning of the wire turns and insulation), and wrapped in cellophane, and then winding the second layer of coil.
4, the head and tail of the two coils are connected to make the series, the other two wires are welded with soft leather wire lead, and insulation. Add a layer of interlayer insulating paper on the primary group and then wind the secondary group, the winding method is the same as the primary winding method.
5, winding coil winding, you can follow the "first dismantled after winding, after dismantling the first winding" rule will be the secondary winding back in turn. Winding does not need to count the number of turns. As long as the enameled wire as tight as possible around the good, and a turn by turn row winding, not cross each other, in general, the original removal of the enameled wire winding light, the number of turns should be almost the same as the original number of turns or only 1 ~ 3 turns less.
Note that each winding needs to be well insulated. After all the winding, the toroidal transformer will be put into the constant temperature box baking for a period of time, and then the whole toroidal transformer for insulation tape wrapping. Finally, the toroidal transformer for drying dipping paint treatment, toroidal transformer is made .
The toroidal transformer is a large type of electronic transformer, has been widely used in home appliances and other electronic equipment with high technical requirements, its main use is as a power transformer and isolation transformer. Toroidal transformer in foreign countries has a complete series, widely used in computers, medical equipment, telecommunications, instruments and lighting and other aspects. China in the past decade toroidal transformer from scratch, so far has formed a considerable production scale, in addition to meet domestic demand, but also a large number of exports.
Electrical efficiency high iron core without air gap, stacking factor can be as high as 95% or more. Vibration noise is small iron core without air gap can reduce the noise of the core induction vibration, winding uniform tightly wrapped around the annular core, effectively reducing the magnetostriction caused by the "hum" sound.
Low operating temperature due to iron loss can be done 1.1W/kg, iron loss is very small, low temperature rise of the core, the winding in the lower temperature of the core on the heat dissipation situation is good, so the transformer temperature rise is low. Easy to install toroidal transformer has only one mounting screw in the center, especially easy to quickly install and remove in electronic equipment.