| 摘要 |
The present invention combines bending mode mechanical (f<SUB>rm</SUB>) and electrical (f<SUB>re</SUB>) resonances, whereby a relatively good efficiency can be achieved within a relatively broad frequency range (Deltaf<SUB>3</SUB>). An electrical resonance (f<SUB>rc</SUB>) or mechanical resonance is designed to be situated in the same order of magnitude as another mechanical resonance (f<SUB>rm</SUB>), but separated therefrom. Preferably, the separation (Deltaf<SUB>2</SUB>) is smaller than 2f<SUB>1</SUB>/Q<SUB>1</SUB>, where f<SUB>1 </SUB>is the resonance frequency for the resonance having lowest quality value, and Q<SUB>1 </SUB>is the corresponding quality value of the mechanical resonance. An electromechanical motor comprising a driving element and electrical resonance circuit according to the above ideas may comprise a double bimorph driving element having one single actuating point influencing a body to be moved. The double bimorph driving element is excited in bending vibrations perpendicular to a main displacement direction, whereby both tangential and perpendicular motions are created by bending mode vibrations.
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