| 摘要 |
The present invention relates to a linear motor. In one embodiment of the present invention, the linear motor comprises a first member incorporating a plurality of armature modules, a second member incorporating a plurality of permanent magnet modules, and a supporting piece; and each of the armature modules has at least 4 projecting poles which project towards the second member from a ring-shaped magnetic body, and wound on each of the projecting poles there are coils through which currents of the same phase flow; disposed in each of the permanent magnet modules there are the same number of permanent magnets as the number of projecting poles comprised in the armature modules; an electrical power source having a predetermined phase difference is applied to each of the armature modules so as to generate thrust due to a forward-travel magnetic field, in units regarded as comprising S armature modules disposed in the direction of forward-travel and P permanent magnet modules, where p is a multiple of 2; and either the first member or the second member constitutes a static element which can be secured to the supporting piece such that the other member, which constitutes a movable element, moves due to the generated thrust. Consequently, it is possible to provide a motor which overcomes the problems which occur due to magnetic attraction and which is easy to assemble and highly efficient. |
