Experimental Studies of Equivalent Circuit for Operating-mode Piezoelectric Transducer
Lei Han · Piezoelectrics and Acoustooptics · 2006
The direct digital synthesizer(DDS) is used to sweep frequency for a sandwich piezoelectric transducer two admittance circles of the transducer about two different resonance frequencies is measured.With admittance circle fitting to experiment data,equivalent circuit parameters can be obtained.The result shows,under different vibration mode,equivalent parallel capacitance and resistance are not constant value.There is negative damp effect in transducer system at the operating mode.