PIEZOELECTRIC SOLID STATE MOTOR STACK

摘要

A piezoelectric solid state motor stack (200) having a plurality of piezoelectric disks (210, 208, 206, 202) interleaved with a plurality of electrodes (204), with at least one first piezoelectric disk (210) of a first thickness sandwiched between at least two second piezoelectric disks (208) of a second thickness, the second thickness being different from the first thickness. The structure includes at least two electrodes (204), each electrode being interleaved with at least two of the plurality of disks, such that each electrode is in contact with a surface of at least one of the plurality of disks. The electrodes are connected to and biased by a source of electrical potential to produce an axial displacement between opposite end surfaces of the stack. The stack may include four different disk thicknesses, with the thickest disks (202) sandwiching decreasingly thinner disks (206, 208, 210) and further electrodes. The order and thickness of the disks may be symmetric about a center axis perpendicular to the longitudinal axis of the stack.