| 摘要 |
PURPOSE:To reduce a loss generated in a lead conductor and eliminate local overheat in order to reduce a loss by employing the lead conductor which has an opening surrounded by a conductor and a cross section roughly formed into Y shape. CONSTITUTION:A lead conductor 1 has an opening 3 surrounded by a conductor and a cross section roughly formed into U shape. A spacing piece 4 is inserted into the opening at its one side. The conductor 1 is stuck to a metal sheet 5 so as to be used as the lead conductor of an inner winding 8. A loss produced by the axial flux generated in the gap between the foil windings can be reduced by reducing the conductor thickness (t). Moreover, a cooled area of the lead conductor is approximately doubled compared to a conductor with a rectangular cross section by utilizing the opening 2 surrounded by the conductor as a cooling oil path. With this constitution, the local overheat of the lead conductor is eliminated even if the sectional area of the conductor is approximately halved. |
