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    • 2. 发明授权
    • Traveling-wave piezoelectric motor
    • 行波压电电机
    • US5726519A
    • 1998-03-10
    • US770134
    • 1996-12-19
    • Paul GonnardLionel Petit
    • Paul GonnardLionel Petit
    • H02N2/00H01L41/09H02N2/10H01L41/08
    • H02N2/163
    • Traveling-wave piezoelectric motor comprising at least one stator (1), two groups of piezoelectric elements consisting of ceramic rods (5) polarized independently of one another, arranged perpendicularly to the stator and excited by an alternating current with a phase shift of .pi./2 between the groups so as to generate a deformation in the form of a traveling wave on the surface of the stator (1), and at least one rotor (2, 3) in the form of a disk. The stator is in the form of a wheel consisting of a peripheral annulus over which the piezoelectric elements are distributed, of a central hub and of linking arms intended to transmit an axial pressure exerted on the hub to the annulus. It is thus possible to compress the rods with a much greater force than that applied to the rotor. This prestress has the effect of limiting the spread in the resonant frequencies.
    • 行波压电电动机包括至少一个定子(1),由彼此极化彼此极化的陶瓷棒(5)组成的两组压电元件,垂直于定子并且被具有π/ 2,以便在定子(1)的表面上产生行波形式的变形,以及至少一个盘形式的转子(2,3)。 定子是轮毂的形式,该轮由中心毂的压电元件分布在其上的外围环形空间和旨在将轮毂上施加的轴向压力传递到环的连接臂组成。 因此可以以比施加到转子的力大得多的力来压缩杆。 这种预应力具有限制共振频率扩展的作用。