Ceramic motor
AssigneeNanomotion Ltd.
InventorJona Zumeris
Life of this patent
Estimating the term…
Abstract
A micromotor for moving a body including at least one rectangular piezoelectric plate having long and short edges and first and second faces, electrodes attached to the first and second faces and a ceramic spacer attached to the center of a first one of the edges and operative to be pressed against the body. A resilient force is applied to the center of a second edge opposite the first edge, whereby the ceramic spacer is pressed against the body. At least some of the electrodes are electrified by either an AC or an asymmetric unipolar pulsed voltage.
Claims38
A micromotor for moving a body comprising:
- at least two rectangular piezoelectric plates, said plates having different hardnesses, each plate having:
- long and short edges and first and second faces;
- electrodes attached to the first and second faces;
- and
- a ceramic spacer attached to the center of a first one of the edges and operative to be pressed against the body;
- means for applying resilient force to the center of a second edge opposite the first edge, whereby the ceramic spacer is pressed against the body;
- and
- means for electrifying at least some of the electrodes.
A micromotor for moving a body comprising:
- at least one rectangular piezoelectric plate having long and short edges and first and second faces and having a plurality of electrodes attached to the first face and at least one electrode attached to the second face;
- means for resiliently urging one of the edges or one or more extensions of the edge against the body;
- and
- means for electrifying at least some of the plurality of electrodes with unipolar pulsed excitation, wherein not all of said plurality of electrodes are electrified simultaneously with the same excitation.
A micromotor for moving a body comprising:
- at least one rectangular piezoelectric plate having long and short edges and first and second faces and having electrodes attached to the first and second faces;
- means for resiliently urging one of the edges or one or more extensions of the edge against the body;
- and
- means for selectively electrifying at least some of the electrodes with unipolar pulsed excitation or AC excitation.
A micromotor for moving a body comprising:
- at least one rectangular piezoelectric plate having long and short edges and first and second faces and having a plurality of electrodes attached to the first face and at least one electrode attached to the second face;
- and
- a power supply which supplies a triangular pulsed voltage between at least one of the electrodes attached to the first face and an electrode attached to the second face, wherein not all of said plurality of electrodes are electrified simultaneously with the same voltage.
A micromotor for moving a body comprising:
- at least one rectangular piezoelectric plate having long and short edges and first and second faces and having a plurality of electrodes attached to the first face and at least one electrode attached to the second face;
- and
- a power supply which supplies a unipolar pulsed voltage between at least one of the electrodes attached to the first face and an electrode attached to the second face, wherein not all of said plurality of electrodes are electrified simultaneously with the same voltage.
A micromotor for moving a body comprising:
- at least one rectangular piezoelectric plate having:
- long and short edges and first and second faces;
- an electrode attached to each quadrant of the first face;
- an electrode attached to the second face;
- a ceramic spacer attached to the center of a first one of the edges and operative to be pressed against the body;
- means for applying resilient force to the center of a second edge opposite the first edge, whereby the ceramic spacer is pressed against the body;
- and
- a power supply which electrifies a pair of electrodes situated respectively on two diagonally located quadrants on the first face with an excitation voltage without exciting the electrodes in the other quadrants.
Dependencies are inferred from the claim text.