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Design of a Charge Drive for Reducing Hysteresis in a Piezoelectric Bimorph Actuator

机译:降低压电双压电晶片执行器中磁滞的电荷驱动器的设计

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This paper describes the design of a charge drive for reducing the hysteresis exhibited by a piezoelectric bimorph bender. Existing charge drive circuits cannot be directly applied to bimorph benders since they share a common electrode. In this paper, a new charge drive circuit and electrical configuration are implemented that allows commonly available piezoelectric bimorphs to be linearized. This circuit consists of four major components, including, a high voltage amplifier, a differential amplifier, a piezoelectric load, and a PI feedback controller. An isolation amplifier was used to achieve a differential amplifier with a high common-mode rejection ratio. The charge drive was tested by driving a series poled three layer bimorph bender. The experiment showed a significant improvement to the hysteresis of the bender when compared to a typical voltage drive. This paper has identified an alternative Feedback method to improve the ac hysteresis performance of a piezoelectric bender by using a charge drive.
机译:本文介绍了一种电荷驱动器的设计,该电荷驱动器用于减小压电双压电晶片弯曲器表现出的磁滞现象。现有的电荷驱动电路不能直接应用于双压电晶片弯曲机,因为它们共享一个公共电极。在本文中,实现了一种新的电荷驱动电路和电气配置,可以使常用的压电双压电晶片线性化。该电路由四个主要组件组成,包括高压放大器,差分放大器,压电负载和PI反馈控制器。使用隔离放大器来实现具有高共模抑制比的差分放大器。通过驱动串联极化的三层双压电晶片弯曲器测试电荷驱动器。与典型的电压驱动器相比,该实验表明,弯管机的磁滞得到了显着改善。本文确定了一种替代的反馈方法,该方法通过使用电荷驱动器来改善压电弯曲机的交流磁滞性能。

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