| 摘要 |
Various types of motor and generator use an electro-active device 11 comprising an electro-active structure in the form of a continuous electro-active member 12 curving in a helix around a minor axis 13 which is in itself curved for example in a helix around a major axis 14. The continuous member 12 has a bender construction of a plurality of layers 21 and 22 including at least one layer of electro-active material so that it bends, on activation, around the minor axis 13. Concomitantly with the bending, the electro-active structure twist around the minor axis. Concomitantly with that twisting, relative displacement of the ends 16 of the device 11 occurs due to the combination of the twisting around the minor axis 13 and the fact that the minor axis 13 is curved. |
