| 摘要 |
930,965. Electric motors; core constructions. FUJI TSUSHINKI SEIZO KABUSHIKI KAISHA. June 6, 1961 [June 6, 1960], No. 20453/61. Class 35. A stepping motor including a set of stator poles and a set of rotor poles is characterized in that the poles of one set comprise a first part and a second part having a greater circumferential width than the first part axially displaced with respect to it and in that the second set of poles have the same circumferential width as the narrower part of the first set. As described, the rotor poles of a motor, Figs. 3, 4, are uniform in cross-section, and the stator poles have a narrow part A1 (B1) and a wider part A2 (B2) giving a stepped cross-section, Fig. 3 (a). The poles A are energized by a coil 4 and the poles B by a coil 3, alternate energization of the coil stopping the motor. The stopping position after each impulse is determined by the narrow part of the pole and the direction of rotation by the wider part. In a modification where rotation in either direction is required, the stator poles are formed with three sections A1, A2, A3, Fig. 7 (a), and the rotor is angularly displaceable, Fig. 8 (not shown), so that the rotor poles lie either under A1, A2 or under A2, A3. |
