Application Cases

Piezoelectric ceramic actuators are a type of micro-displacement device that has developed in recent years. They are characterized by their small size, high thrust, high displacement resolution and accuracy, and fast response speed. The ATA-P series power amplifiers are ideal power amplifiers that can amplify AC and DC signals. The maximum output power can reach 1300 Wp, which is capable of driving piezoelectric ceramic plates, stacked piezoelectric ceramics, open-loop packaged piezoelectric ceramics, and nano-positioning worktables, among other piezoelectric actuation products. The voltage gain is numerically adjustable, and commonly used settings can be saved with a single button press, providing convenient and simple operational choices. They can be used in conjunction with mainstream signal generators to achieve signal amplification.

Experiment Name: Closed-Loop Control of Micro-Displacement Based on Piezoelectric Stacks

Experiment Principle: When an external electric field is applied to a piezoelectric ceramic, it causes the positive and negative charge centers within the material to shift relative to each other, resulting in polarization and mechanical deformation. By changing the voltage applied across the piezoelectric ceramic, the internal electric field strength can be altered, thereby changing the output displacement of the piezoelectric ceramic to achieve high displacement resolution. Therefore, they are relatively ideal micro-displacement devices in many applications.

Experiment Block Diagram:

Experiment Process: The power amplifier is used to amplify the small signals from the data acquisition card to drive the piezoelectric stack. Since the piezoelectric stack itself has a small displacement, a displacement amplification mechanism is designed to achieve a large stroke displacement. An inductive displacement sensor is then used to measure the displacement, which is converted into an electrical signal and fed back to the data acquisition card to achieve closed-loop control.

Experiment Results: The experiment successfully completed the hysteresis nonlinearity compensation for the micro-displacement movement of the piezoelectric stack. This solution offers high tracking and positioning accuracy, fast response speed, and strong anti-interference capability.

Application Directions: Optical control, mechanical industry

Application Scenarios: Lens tilting, precision machining, fiber stretching, piezoelectric dispensing valve

Product Recommendation: ATA-P Series Power Amplifiers

Figure: Specifications of the ATA-P Series Power Amplifiers