Physik Instrumente’s E-482 power amplifier and controller outputs 6A peak current for high-voltage piezo actuators.
For applications, such as material testing for quality control purposes or highly dynamic control of valves in test stands, PI has introduced the E-482 high-power piezo amplifier and controller.
The 19-inch bench-top amplifier is especially designed for the operation of piezo actuators with high electrical capacitance, such as the PICA piezo actuator series P-225 and P-235.
This class D switching amplifier modulates the pulse width of the control signal and thus controls the piezo output voltage.
When the piezo actuator is discharged, a patented circuitry for energy recovery stores the returning energy in a capacitor and makes it reusable for the next charging cycle.
The E-482 achieves high efficiency with peak currents of up to 6 A and average currents of up to 2 A. In comparison with analog amplifiers, this type of energy recovery allows energy savings of up to 80%.
Furthermore, the amplifier does not heat up as much and thus influences the actual application less. The output voltage range of 0 to 1050 V can be set to bipolar on request.
The power amplifier allows easy installation of the E-509 sensor- / servo-controller module for closed-loop operation.