1704 Driving of Piezoelectric Actuator Using Variable Capacitor
Details
A new open-loop driving method of piezoelectric actuator is proposed which is characterized by using variable capacitor. The actuator and the variable capacitor is connected m series and a constant voltage is applied to this connection. The charge of the actuator is controlled by adjusting the value of the variable capacitor. In the experiment, the variable capacitor is realized by switching the connections of several prepared capacitors. The Experimental results demonstrate that hysteresis is rather small in the proposed driving system.
