Patent ID: 6150750
Filing Date: 2000-11-21
Classification: H02N

Abstract:
A piezoelectric linear stepping motor comprising a housing having fixing units secured therein and a part movable relative to the housing, wherein the fixing units comprise at least two piezoelectric units, each piezoelectric unit comprising a shifting piezoelectric cell and a fixing piezoelectric cell separated from each other, from the housing and from a friction element by insulators, the fixing piezoelectric cells having a vector of polarization perpendicular to a longitudinal axis of the motor, and the shifting piezoelectric cells having a vector of polarization at an acute angle to the longitudinal axis of the motor, the piezoelectric units are disposed inside the housing one behind the other in a longitudinal plane, whereby the fixing cells sequentially engage and disengage the movable part, to grip the movable part, and whereby the shifting cells linearly shift the movable part.