IEEE Trans Ultrason Ferroelectr Freq Control. 2022 Jan;69(1):299-308. doi: 10.1109/TUFFC.2021.3109594. Epub 2021 Dec 31.
To explore a noncontact drive solution for linear piezoelectric actuators, a novel type of noncontact linear piezoelectric actuator modulated by the electromagnetic field is proposed. The proposed actuator employs electromagnetic force to modulate and transfer the locomotion between the stator and the runner. The drive scheme reduces the wear and friction between the stator and the runner and can control the coupling force by the electric system. Here, the design pattern and working principles are described. The amplification ratio equation of the flexible amplification mechanism is established, and the calculation method of the dynamic electromagnetic force is illustrated. For assessing the validity and measure the output characteristics of the proposed actuator, a prototype is fabricated to measure the output speeds, the stepping distances, and the output forces. The experimental results show the actuator with the driving frequency of 1 Hz, the electromagnetic modulation voltage of 4 V, and the piezoelectric driving voltage of 100 V can continuously output a stall load force of about 0.15 N and speed of 0.33 mm/s.
为了探索线性压电执行器的非接触式驱动解决方案，提出了一种新型的基于电磁场调制的非接触式线性压电执行器。该执行器采用电磁力来调制和传递定子和动子之间的运动。该驱动方案减少了定子和动子之间的磨损和摩擦，并可以通过电控系统来控制耦合力。文中描述了设计模式和工作原理。建立了柔性放大机构的放大比方程，并阐述了动态电磁力的计算方法。为了评估所提出的执行器的有效性并测量其输出特性，制作了一个原型机来测量输出速度、步距和输出力。实验结果表明，在驱动频率为 1 Hz、电磁调制电压为 4 V 和压电驱动电压为 100 V 的情况下，该执行器可以连续输出约 0.15 N 的静载力和 0.33 mm/s 的速度。
