| 摘要 |
PURPOSE:To interrupt circulating currents by forming an insulating layer around the coil conductor of the looped cast coil, shaping a conductive layer with not less than one divided section on the outer circumference of the insulating layer and connecting the conductive layer to the coil conductor and a lead wire. CONSTITUTION:A glass fiber reinforced plastic layer (an FRP layer) 2 at the outside of a coil conductor 1 wound and bundled, a conductive layer 4 forming an electric field shield at the outside of the FRP layer 2 and a cast resin layer 5 are formed successively. The conductive layer 4 is divided on its midway by separating sections 10, 11. Respective conductive layer 4 is connected electrically to the coil conductor 1 by connecting sections 12, 13 in the vicinity of leads. Accordingly, the circulating currents resulting from electromagnetic induction action are divided by the separating sections 10, 11 and do not flow by dividing the conductive layer 4 shaped to the coil conductor 1. |
