主权项 |
1. A method of providing cooling ducts in a coil of a transformer, the coil including a first coil segment and a second coil segment, method comprising the steps of:
a) providing a first mold for the first coil segment, b) winding conductor sheeting around the mold to form a plurality of conductor layers, c) during the winding, placing spacers between certain of the conductor layers, d) placing segmented cooling ducts in channels created by the spacers, e) providing a second mold for the second coil segment, f) performing steps b) though e) to provide the second coil segment with spacers and cooling ducts, g) electrically connecting the first and second coil segments together so as to define a space between the coil segments, h) inserting cooling ducts into a cavities defined by the spacers in each of the first and second coil segments so as to define pairs of adjacent cooling ducts, i) for each pair of cooling ducts, connecting an end of a cooling duct disposed in the first coil segment with an adjacent end of a cooling duct disposed in the second coil segment, and j) removing the spacers. |