I want to make a set up for micro-edm machine in which workpiece will vibrate with the help of PZT actuator. I want to understand how power amplifier connected with it? And also, how can i create different frequency and amplitude of vibration. I have heard function generator does this, but how?
Power amplifier converts a low-voltage signal (for example, 0-10V) to the piezoactuator actuation voltage (-20 to 150V). You may consider buying something like MX-200 piezodriver (power amplifier).
For actuating piezoactuator at different frequencies and amplitudes, you just need to provide the corresponding signal at the power amplifier input (amplitude within 0-10V and the desired frequency). Hope this helps!
PZT actuators can be actuated using a voltage amplifier or a charge amplifier. Charge amplifier will reduce the hysteresis of the PZT. Chose the amplifier based on your piezo specifications and voltage ratings.
Normally a PZT actuator has a very high bandwidth >20kHz, therefore creating different frequencies is possible below the bandwidth of the actuator. You can use any real time interface(eg. simulink real time with dSpace/ speedgoat IO boards) to generate your frequency signals and feed into the amplifier.
I used a Speedgoat IO104 FPGA with simulink real time to generate signals.
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