Interesting Facts I Bet You Never Knew About Piezo Rings

                     Interesting Facts I Bet You Never Knew About piezo rings

35Khz piezoelectric ring

P5 material piezoceramic rings

piezo ring bimorph

When the pre-pressure of 35Khz piezoelectric ring is small, the contact area of the stator is small, the contact point is concentrated on the peak point of the stator, and the contact area is all the driving area. As the pre-pressure increases, the contact area between the stator and rotor becomes larger, the piezoelectric ring for ultrasonic welding also becomes larger, the tangential transmission capability of the interface is continuously increased, and the area of the sliding friction is increased, so that the energy dissipation rate becomes large. As the pre-pressure continues to change, the contact area has a blocking area that blocks the movement of the rotor. 

Therefore, as the pre-pressure increases, the startup time of piezoceramic rings piezo accelerometer increases . The stator bending curvature has effect on the motor has a great influence on the load characteristics of the motor. When the stator inner-outer diameter ratio Y>0.40 (small curvature) and the inner-outer diameter ratio y<0.40 (large curvature), There is a gap between the experimental results. The experiment has an outer diameter of 60 mm, an inner diameter of 45 mm, and an inner-to-outer diameter ratio for P5 material piezoceramic rings is about 0.75>0.40. Therefore, the effect of the curvature effect can be ignored. 

The fatal weakness of the ultrasonic motor is that the temperature rise is serious, it will cause the thermal deformation of the motor body structure, the phenomenon of degumming softening between the piezoelectric ceramic and the stator, resulting in the shear resistance, and the output of the piezoelectric ceramic can not be well It is transmitted to the stator, which in turn affects the vibration output of the stator. It is 22Khz piezoceramic rings for ultrasonic motor . It can be seen that as the time increases, the surface temperature of the motor rapidly rises and it stabilizes after reaching a certain temperature. The temperature of the motor rises very fast,Within 20 minutes, the surface temperature of the piezo ring bimorph can reach more than 40°C, and the surface temperature stabilizes at about 48°C after 80 minutes. TRUM. The surface temperature of the piezoelectric ring transducer rises slowly, the surface temperature reaches 25°C or more after 20 minutes, and it completely stabilizes at 35°C at 40°C. The theoretical simulation results are consistent with the actual results.