| 摘要 |
<p>The invention concerns a step motor with two magnetic induction coils (9, 10) and a rotor (1) consisting of a permanent magnet with n poles, the magnetic yoke consisting of two parallel planar plates (2, 3) linked by two spacers (7, 8) around which said coils (9, 10) are arranged, two coaxial orifices (13, 14) provided in said plates (2, 3) defining a space with cylindrical appearance wherein the rotor (1) is placed, each plate (2, 3) including teeth (5, 6) oriented substantially perpendicular to its plane, in the direction of the other plate (3, 2), arranged at the periphery of the orifices (13, 14) through which the rotor (1) passes, the teeth (5, 6) coming from the two plates (2, 3) interlocking with each other to form a cage wherein the rotor is housed (1). The invention is characterised in that one of the plates (3) comprises n/2 teeth, whereas the second one (2) comprises only n/2-1 teeth, the magnetic circuits associated with each coil (9, 10) comprising likewise n/2 and n/2-1 teeth respectively.</p> |
