| 摘要 |
<P>PROBLEM TO BE SOLVED: To prolong the lifetime of a vibration wave motor by preventing eccentric wear of the frictional material of an elastic body resulting from unevenness of a progressive vibration wave. <P>SOLUTION: A plurality of cycle voltages having different phases are applied individually to a plurality of divided and polarized elements constituting an electro-mechanical energy conversion element (piezoelectric element 105). <P>COPYRIGHT: (C)2004,JPO&NCIPI |
