| 摘要 |
PURPOSE:To reduce the generation of an eddy current due to the excitation of an inclined magnetic field coil, by forming a winding core from a nonmetal and providing a cut part to a flange. CONSTITUTION:A coil 12 is directly wound around a winding core 17 formed of an insulating mateial such as FRP. A flange is a metal disc but has a cut part 19 at a part thereof and electically disconnected. Further, a groove 18a is provided to the flange 18 in the side faced to the coil 12 and the end part of the winding core 17 is inlaid with said groove 18a to secure the strength of the flange 18 while preventing the deformation thereof. A connection plate 20 has a projection provided to the inside thereof while said projection is inlaid with the cut part 19 to prevent the deformation of the flange 18 and made of a non- magnetic metal having electric resistance higher than that of an insulating material of flange material and fixed to the flange 18 by a connection screw 2. When a magnet is small and light, the connection plate 20 and the connection screw 21 may not be used. |
