Piezoelectric Actuators, Flextensional, Compliant Mechanisms

VF-90 Linear Piezo Amplifier

Description

DSM's VF-90 linear piezoelectric amplifier module provides functionality for driving piezoelectric (capacitive) loads in an extremely compact form factor.

The single channel module is designed into National Instruments' CompactRIO format for use in a CompactRIO and CompactDAQ chassis or for use outside of the chassis environment.

The VF-90 is powered by a 5.5V AC/DC adapter (provided by DSM with the VF-90). Low voltage analog input signals are amplified by the VF-90 with a gain of 40.

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Please review this suggested wiring arrangement to help you get started in exploring the use of the VF-90 piezo amplifier.

Operation/Performance

The VF-90 is configured at the factory for one of two output voltage ranges:

-30 to +150V
-30 to +200V

Electrical connections for power, input signal, and output voltage are made through the module's screw terminals. The VF-90 features over-current, over-temperature, and short-circuit protection as well as protection against over/under voltage conditions on the power line. The output voltage range of the VF-90 can exceed the rated voltage limits. If the input signal exceeds the prescribed input voltage range, the piezo load can be damaged.

Specifications and Highlights

Maximum Continuous Current: 90 mA
Maximum Peak Current: 90 mA
Dimensions (NI cRIO 9952 chassis): Approx. 3.5" x 4" x 0.9"
Amplifier bandwidth: > 5 kHz (-3 dB)
Electrical Noise on Output: ~2 mV,rms
Short circuit, over-current, and over-temperature protection
Input Power: 5.5 VDC (from an AC/DC adapter included with each VF-90 unit)
RoHS compliant, FCC and CE Compliant
NOTE: Under certain operating conditions, the VF- 90's power capabilities can exceed the maximum heat dissipation allowable by NI's CompactRIO and CompactDAQ specifications.

Custom Actuators and Drive Electronics

DSM has extensive experience in custom piezoelectric system design for specialized performance and/or environmental requirements. Please contact us regarding your specific needs.