Patent ID: 7157830

Claim:
Electromechanical motor system comprising: a motor assembly having electromechanical driving element; said electromechanical driving element being arranged to actuate in both tangential and perpendicular direction on a body to be moved by use of essentially only bending modes; and a drive control connected to said electromechanical driving element; said electromechanical driving element having at least a first mechanical bending mode resonance and a second mechanical bending mode resonance, each of which having an associated resonance frequency; said first mechanical bending mode resonance frequency having a value in the same order of magnitude as said second mechanical bending mode resonance frequency; said first mechanical bending mode resonance frequency being separated from said second mechanical bending mode resonance frequency with a frequency separation smaller than 2f r1 /Q 1 , Q 1 being the lowest quality value among quality values of said first mechanical bending mode resonance and said second mechanical bending mode resonance, respectively, f r1 being a resonance frequency of the resonance having the quality value of Q 1 ; said first mechanical bending mode having a stroke direction parallel to a stroke direction of said second bending mode; said electromechanical driving element being supported by pivot supports, allowing ends of said electromechanical driving element to move; said driving element having only one single actuating portion for interacting with said body to be moved; and said driving element having a main extension essentially parallel to a main displacement direction of said body to be moved.