Piezoelectric quasi-resonant motor based on the acoustic standing wave includes a resonator in combination

摘要

As well as having a surface portion and a second opposing first piezoelectric device comprises a piezoelectric resonator body 3 having a surface portion of the third and fourth opposed. Electrodes 4a pairs of the electrodes 8 of one common, are arranged along the longitudinal axis of the first surface portion 14 at least the first, the device, and 4b provided on the surface portion 15 of the second further I include the. The apparatus contact element 5 is arranged on the contact locations along the surface portion 17 and the fourth surface 16 of the die 3, the vertical axis of the first addition, it is aligned between a pair of excitation electrodes of each I include the. In the device-specific resonant frequency of the order equal to the first order along the natural resonant frequency of the primary along the longitudinal axis of the second (ν1), the longitudinal axis of the first piezoelectric resonator body, (ν2) has a door, the percent difference between the natural resonant frequency of the (ν1) natural resonant frequency of the (ν2) is less than 20% and greater than 0%. [Selection] Figure Figure 1