Application of a novel battery charger system to new developed piezoelectric actuator for high speed micropositioning motion

This paper presents the implementation of developed stacked piezoelectric actuators (PZT) via a novel developed direct current digital battery charger device (DBCD). Battery charger system is developed for powering PZT and utilized for micro precision motion actuation. This power system without conventional transformer is constructed without the use of conventional coil and the use of high-frequency switching power design. Emphasis placed here is on controlling and data acquisitioning the characteristics of PZT via the developed technique of high speed, voltage-feedback-loop power amplifier. Voltage is digitally commanded to PZT in real time compensation by circuitry design. Because precise displacement of PZT is useful in micro positioning under the consideration of external load, the motion of PZT is controlled by supplied voltage in parallel with an additional capacitance in this study. The developed integrated PZT system illustrates to be very attractive and practical for future advanced piezoelectric motion control technique.