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Piezo Actuators

Monolithic Multilayer PZT Actuators

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leftp.inc

E-471.00 Configuration example: E-471.00 HVPZT amplifier, with optional E-509.S1 PZT servo-controller (strain gauges) and E-516.i3 20-bit DAC interface/display.


E-420.00 HVPZT amplifier module


E-472.00 HVPZT amplifier


E-420, E-470, E-471, E-472, frequency response with various PZT loads. Values shown are capacitance in nF, measured in actual PZT.

High-Power, Modular High-Voltage Driver Amplifier / Controller: E-470 E-471 E-472 E-420

The E-470 series high-power high-voltage amplifier / controllers are specifically designed to drive high-capacitance PZT actuators. They are based on the E-420 amplifier module, which can output and sink a peak current of 500 mA and an average current of 100 mA in a voltage range of -3 to -1100 V (positive or bipolar range, jumper selectable). OEM, 19" rackmount, bench-top, and two-channel versions are available, some with servo-control module and display (see Ordering Information for standard combinations).

Standard versions can be operated in two ways:

I. Manual operation:
The output voltage can be set by a 10-turn, DC-offset potentiometer in the range of -3 to -1000 Volts

II. External operation:
Output voltage is controlled by an analog signal applied to the BNC input, ranging from 0 to 11 Volts. Multiplying by the gain factor of -100, an output voltage range of -3 to -1100 Volts results. The DC-offset potentiometer adds a DC bias to the input, allowing continuous shifting of the input range between 0 V to +10 V and -10 V to 0V (see link).

See graph for frequency response with selected HVPZTs.

Upgrades
The E-471.00 version allows installation several upgrade options for enhanced versatility (see Ordering Information). Two additional modes are possible with versions having the E-509 Sensor & Servo-Controller Module upgrade:

I. Manual Closed-Loop Operation:
Displacement of the PZTs can be set by a 10-turn DC-offset potentiometer in the range of zero to nominal displacement.

II. External Closed-Loop Operation:
Displacement of the PZT is controlled by an analog signal in the range of 0 to +10 V, applied to the BNC input. The controller is calibrated in such a way that 10 V corresponds to maximum nominal displacement and 0V corresponds to 0 displacement. The DC-offset potentiometer can be used to add an offset voltage of 0 to 10 V to the input signal.

Piezo Driver