| 摘要 |
<p>A linear stepping motor adapted to be rapidly displaced between, and accurately and stably positioned in, successive quiescent positions. The stepping motor comprises a stationary section including at least three energizing elements (1-1...1-10) located in one row in the direction of displacement of the motor and at least one pole shoe (2-1...2-11) of ferromagnetic material is arranged between successive energizing windings (3). The dimensions of the successive energizing elements (1-1...1-10), as viewed in the direction of displacement of the motor, are equal and the successive energizing windings (3) are so formed that the magnetic field lines (3',3'') thereof are substantially parallel to the direction of displacement of the motor. The motor further comprises a movable section having a bottom surface facing a top surface of the stationary section and at said bottom surface including at least two armature elements (6, 6') of a ferromagnetic material. The armature elements (6, 6') are arranged on a material having a low magnetic permeability, and the dimension of each of the armature elements (6, 6'), as viewed in the direction of displacement of the motor, is essentially equal to the distance between the pole shoes (2-1...2-11) bordering one energizing winding (3). The motor further comprises means (7, 7', 8, 8') for supporting and guiding the movable section relatively to the stationary section with an air gap between the armature elements (6, 6') and the top surface of the stationary section.</p> |
