| 摘要 |
PURPOSE:To prevent the production of a crack in the vicinity of a bonded part of a frame terminal board due to thermal elongation of an inner insulating cylinder by composing an outer frame of a stator and the board which is provided at each of both ends of the cylinder provided inside the outer frame of a stator of a thin metal plate. CONSTITUTION:One end 21 of a frame terminal board 2 having a short radial size is secured to each of both ends of a frame 1 which forms the outer frame of a stator, a flange 9 is formed at each of both ends of an inner insulating cylinder which is disposed inside the frame 1, a thin metal plate 10 made of a nonmagnetic metal having small elastic coefficient and large strength, e.g., a stainless steel plate or a titanium plate is arranged over the other end 22 of the board 1 and the flange 9, and clamped with bolts 11, 12 through gaskets 12, 14. A core or a magnetic shield and an armature coil are contained in the space which is formed of the frame 1, the board 2 and the cylinder 3, and coolant is sealed. Further, the size of the cylinder 3 is shortened to become the same length as the frame 1 at the thermal expansion time in operatiom. |
