Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology
An oil-immersed transformer and manufacturing process technology, applied in the direction of coil manufacturing, etc., can solve the problems of increasing terminal insulation manufacturing process, thin insulation between cable paper layers, foil puncture, etc., and achieve good mechanical strength and strong short-circuit resistance , the effect of improving reliability
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[0026] DMD prepreg cloth with a thickness of 0.25mm is used as interlayer insulation for low-voltage foil winding coils. DMD prepreg cloth rolls are customized according to design drawings (width = coil height - 2mm), and the width of DMD prepreg cloth is 10mm longer than the coil foil material. -20mm, it is wound together with the foil on the foil winding machine. After the coil is wound, it is tightly wound with half a layer of DMD prepreg tape and a good fixture is placed in the oven. The temperature is gradually raised to 155° and baked for 5-8 hours. Afterwards the DMD prepreg and foil are cured into a fully foil-wound steel body structure.
[0027] This process cancels the insulation of the use end, and after the coil is wound, it is molded and cured so that the DMD prepreg and the foil are cured into one, so that the coil not only has strong mechanical strength and short-circuit resistance, but also reduces the hidden danger of interlayer insulation damage , and the end...
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