Micromechatronics, Inc. (MMech)

www.mmech.com - Ph: 814-861-5688

NDR6881 - Dual Channel, Laboratory Driver for Piezoelectric Actuators

Piezo Drivers

NDR6881-Imag

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Features

  • High current
  • High power
  • Power recovering
  • Wide frequency range
  • Two separate channels
  • Floating output
  • Galvanic separation of output from other circuitry

Purpose

The NDR6881 is the dual channel driving unit used for static and dynamic supply of large piezoelectric actuators having capacity up to 200uF. The NDR 6881 is primarily designed as a standalone laboratory desktop unit. It is used for driving or positioning or (in common sense for operating only the piezoelectric actuators/stacks of various types. The device is not designed for use with loads having high energetic losses. The device also cannot be used with piezoelectric actuators having positive energetic balance in long term meaning (energy harvesting).

Description

The device is a source of single polarity voltage. Its value is proportional to input signal. The NDR6881 consists of two main blocks – the preamplifier and the high voltage stage. The input stage is galvanically separate from the output high voltage part. Signal ground of the BNC connector is connected to device casing. Amplifier outputs are floating. One of its wires could be optionally grounded externally.

Electrical Parameters

Parameter
Unit
Value
Number of channels

2
Supply Voltage
V
230V/50 Hz or
115V/60 Hz
Supply Current
W
Max. 110
Output voltage amplitude and load current (RMS)
V
0 - 150
A
3.5
Peak Current
A
10
Power losses actuator covered by the driver
W
80 For all the amplifier
Low Frequency Limit
Hz
0 (DC coupled, but galvanically isolated)
High Frequency Limit (at -3dB)
kHz
6 Full stroke
20 Small signals
Frequency filter
Hz
100
Output voltage linearity
%
5
Output noise
mV
302 RMS, at 50 µF load
Maximum capacitive load
µF
200
Input Voltage range
V
0 to 10 or 10 - 0
Input impedance
kOhm
10
Input connector
BNC
Output connection
+/- terminal and 4 way Amphenol type 62IP
Maximum voltage between input and output part
V
500
Dimension
mm
382 x 270 x 160
Mass
kg
7.9
Temperature range
°C
+5 to +45