| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin mold coil and a mold transformer having excellent long term reliability in which void defects remain little in a mold material.SOLUTION: A resin mold coil 1 includes a cylindrical core 2 formed of an insulating protective film, a coil formed by winding a conductor 3 around the outer periphery of the core 2 so as to form a plurality of layers, a cylindrical interlayer insulation material 4 interposed between respective layers of the coil, and a mold material 5 covering the periphery of the conductor 3. The mold material 5 is a cured resin formed by curing liquid thermally-curable resin thermally. The interlayer insulation material 4 is composed of an insulating sheet formed cylindrically, and insulates between respective layers of the coil. Between the conductor 3 and the interlayer insulation material 4 adjacent in the axial direction, an a void having an almost triangular cross section at right angle to the continuous direction is formed as continuing spirally along the conductor 3 so as to be surrounded by the conductor 3 and the interlayer insulation material 4. The interlayer insulation material 4 has a plurality of through holes for injecting the liquid thermally-curable resin into the void. |
