| 摘要 |
PURPOSE:To facilitate measurement by replacing a deflection amount of a corrugated leaf spring with the other measuring amount. CONSTITUTION:In two streaks of upper and lower armature coils 2 housed in a slot 1a of an iron core 1, a spacer piece 3 is interposed mutually between the coils, and spacer pieces 4a, 4b are interposed on the side surface of the coil, while a corrugated leaf spring 16 is interposed, in a manner with its both sides interposed by wedge lower liners 14a, 14b, between 15 and the coil 2. The corrugated leaf spring 16, when the wedge 15 is driven into a wedge groove 1b of the slot 1a, is given a predetermined deflection, and a spring system is constituted such that both ends in the width direction of the wedge 15 are attached to the core and supported at two points and resiliently supported with a predetermined spring constant for the coil 2. By providing the non-linear characteristic in the characteristic of the spring 16, when a deflection amount is set to a value close to the maximum deflection value, deterioration of the deflection amount due to the aging of the dimension in the insulation coating or the like of the coil 2 is accurately obtained by measuring the natural frequency of the wedge 15. |
