A Novel Method of Stabilizing the Vibration Velocity at the End of Piezoelectric Transducers

The vibration velocity at the end of a piezoelectric transducer is difficult to be stabilized. This paper theoretically analyzes the relationship of its admittance and frequency, and the main reasons of over voltage and over current caused by the traditional current-based stabilizing vibration velocity method. In light of the above, the authors present a novel method, which takes advantages over the traditional one in terms of the time and the amplitude of the overshoot voltage or current. Accordingly. the transducer and its generator can be effectively protected.