| 摘要 |
PURPOSE:To reduce eddy current loss of a stator for an underwater motor by forming the part faced with the rotor of a case for containing the stator of steel fiber in an axial direction and of plastic reinforced with fiber having a resistivity larger than that of a steel in a circumferential direction. CONSTITUTION:A stator having a stator winding 4 and a stator core 5 is watertightly sealed with molding resin 6 in a case 1. The surface except the surface 3 opposed to a rotor of a case 1 is formed of steel by welding and bending. The surface 3 of the case 1 is formed axially of steel fiber mainly and circumferentially of plastic reinforced with fiber (carbon fiber or the like) having a resistivity larger than the steel mainly, and the bended part A of the case 1 to the steel part is bonded with an adhesive. In this manner, the axial thermal expansion coefficient is equal to that of the steel part to reduce the stress of the bonded part, and eddy current can be simultaneously reduced. |
