|
The E-480 high-power amplifier/controller is specifically designed to drive high-capacitance piezo actuators (e.g. the P-056.90P, p. see link). The E-480 is based on a novel design combining pulse width modulation and energy-recovery. Instead of dissipating the reactive power in the heat sinks, it is recovered so that only the active power used by the piezo actuator has to be supplied. During discharge of the actuator, the energy not used is returned and reused to supply the amplifier.
The E-480 can output and sink a peak current of 2000 mA and features a temperature sensor input and controller circuit to shut down the amplifier if the PZT exceeds a maximum temperature threshold.
With its high peak power rating of 2000 W, the E-480 is not recommended for operating smaller piezo actuators. It is equipped with a special 8-pin socket. The wiring of the mating connector determines voltage range seen by the actuator. One pin carries the variable output, which always runs between -500 and +500 V relative to ground. The other pins offer controlled, fixed voltages of -500, -250, 0, +250, and +500 V. The piezo actuator is connected so as to see to the desired potential difference. This design allows bipolar operation, or operation of two actuators in a bridge.
The E-480 can be operated in two ways:
I. Open-Loop Manual Control (power-supply mode):
Output voltage can be set by a high-resolution, 10-turn, DC-offset potentiometer.
II. Open-Loop External Control (amplifier mode):
Output voltage is controlled by an analog signal at the BNC Control Input ranging over a maximum of 10 V. The amplifier output on pin 1 then is determined by the signal on Control IN in conjunction with the gain factor of -100 (optionally +100), the DC-offset potentiometer position and the wiring of the Feed lines.
Upgrades
The E-480.00 allows installation of 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:
III. Closed-Loop (position control mode) Manual Control:
Displacement of the PZT can be set by a 10-turn, DC-offset potentiometer in the range of zero to nominal displacement.
IV. Closed-Loop External Control:
Displacement of the PZT is controlled by the analog signal at Control IN. A unipolar system would be typically set up so that 10 V corresponds to maximum nominal displacement and 0 V corresponds to 0 displacement. The DC-offset potentiometer, which adds 0 to 10 V to Control IN, can be used to shift the input voltage range if desired.
|
|
Notes
Important calibration information: please read details on p. see link.
|
PDF Catalog Datasheet
