Images
|
Description: The 17 PCW series of high-performance piezoelectric controllers has been designed to operate open-loop piezoelectric actuators, as incorporated in various precision nanopositioning assemblies. These three-channel-amplifier controllers are designed for static and dynamic applications when remote or programmed control is required with high stability and precision. The Melles Griot piezoelectric actuators are capacitive in nature. Consequently, special design considerations are necessary to ensure high linearity, low noise, and high-frequency response. Since these piezoelectrics present a wholly reactive load to the drivers, the factor limiting the frequency response is the available output current.
Each amplifier channel has a choice of inverting (DIFFerence) and noninverting (SUM) inputs to allow for convenient inclusion into closed-loop control systems. The 0- to 10-Vdc input signal drives the output from 0 to 75 Vdc. Each channel has an independent summing dc offset with a manual front-panel potentiometer knob that is used to bias the output. If the sum of the bias voltage and the input exceeds 10 V, the input is clipped to 10 Vdc. Operating the piezos in a push-pull manner is achieved by offsetting the dc bias voltage to a midrange value and modulating the input voltage accordingly.
Users can continuously monitor the status of each of the three channels by viewing separate front-panel LCD displays. Additionally, 0- to 10-Vdc analog outputs (representing the 0- to 75-Vdc outputs) are available at three BNC sockets on the rear panel. Positioning resolution is a direct function of the noise produced by the driver or controller. Careful design of these amplifiers to lower the noise levels has minimized the noise-equivalent motions. Controller stability has also been enhanced by optimizing the open-loop bandwidth in the 0- to 10-kHz range, the electromechanical response region of the basic piezo stacks. The controllers are provided with two folding front feet to enable operation in a horizontal position or tilted up at approximately 7 degrees.
This unit has the following specifications:
Output Voltage: 3 channels, 0–75 Vdc, SMC screw connectors
Voltage Stability: 100 ppm over 24 hours
Noise: < 3 mV
Output Current: 0 - 75 mA per channel
Bandwidth: DC - 1 kHz
Display: 3.5 digit LCD, each channel
Output Monitor: 0 - 10 Vdc rear-panel BNC, each channel
IEEE-488 Interface
Feedback: No
|
Interested In Purchasing This Item? Call Us Toll Free (888)449-7653 or email us.
Email This Listing to a Friend
|
