| 摘要 |
PURPOSE:To constitute a power saving contactless mechanism by forming a levitation permanent magnet of laminated piezoelectric elements, through an operational gap with respect to a stator, at the opposite side from a stator for thrusting a mover through a thrust generating magnetic circuit. CONSTITUTION:A mover 24 is mounting a thrust generating magnetic circuit 29 comprising magnetic poles 25a-25d, a coil 26, a permanent magnet 27, and a yoke 28 and moves in the longitudinal direction of the stator 21. A gap G1 is detected 36 and controlled 37 then power amplification 38 is carried out and a laminated piezoelectric elements 34 are controlled. The piezoelectric elements 34 are fixed to the movable table 33 of a base 30 and a gap G2 is formed with respect to the stator 21 through a yoke 32 and a levitation permanent magnet 31. Linear guides 35 comprising two rows of ceramic balls are arranged at the opposite sides of the mover 24 such that they can be displaced freely only in the straight direction. By such arrangement, a contactless power saving mechanism requiring no lubrication can be formed. |
