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CSAP02

CSAP02

Products in this category
  • CSAP01
  • CSAP02
  • CSAP03
  • CSAP04

The Noliac shear plate actuators are characterized by providing a large stroke for a very compact design. The shear plate CSAP02 measures 5x5x0.5 mm and provides a free stroke of 1.5 μm and a capacitance of 830 pF.

Specifications Drawings Mount and connect Wires
Specifications
Attributes
Value
Tolerance
Length
5 mm
+/-0.10 mm
Width
5 mm
+/-0.10 mm
Height
0.5 mm
+/-0.05 mm
Chamfers
0.5 x 45° mm
Operating voltage, max.
± 320 V
Free stroke, from -Vmax to +Vmax
1.5 µm
+/- 15%
Capacitance
0.83 nF
+/- 15%
Maximum operating temperature
200 °C
Material
Unloaded resonance frequency
1750.00 kHz
Electrodes
Au on Ni, plated
Remarks
Stroke measured under up to 3,5Mpa axial load without loss of performance,
Drawings
Noliac - Your Piezo Partner
Mount and connect

Mounting

Shear plate actuators present electrodes on top and bottom surfaces. They may be mounted either by mechanical clamping or gluing.

In case of clamping, axial stress on shear plate actuators must be controlled. Too low pressure can lead to slippage whereas too high pressure can damage the ceramic. With the appropriate contact surface and in the case of low shear force, a pressure of 1 to 3 MPa can be recommended.

If clamping is used, the stiffness of the loading mechanism in the actuation direction shall be as low as possible in order not to hinder the movement of the actuator.

The force must be applied on the full surface of the actuator in order to ensure a good load distribution. In particular when applying the pressure, the contact surfaces have to be sufficiently flat or compliant.

It can be necessary to insulate the contact surfaces from the rest of the structure. This can be achieved by adding inactive ceramic plates in the structure, or polyimide film insulator.

If glued, it is important to ensure a very thin glue line between the shear plate actuators and the substrate. This is generally ensured by using low viscosity glue. A pressure, e.g. 2-3 MPA, should be applied during the curing process.

Epoxy glues are well suited for gluing piezoceramics however several alternatives exist.

Electrical connection

External electrodes

Since shear plate actuators can be used with bipolar symmetrical electrical supply, both electrodes are identical. The direction of operation is indicated by the chamfers.

Sign convention: A positive voltage on one electrode leads to a relative displacement of this electrode towards the chamfered edge.

Electrical connection to the external electrodes can be achieved by mechanical contacts, soldering, gluing with electrically conductive glues or wire bonding.

Mechanical connections

Mechanical connections can be arranged by e.g. copper springs contacted to the external electrodes. Shear plate actuators are provided with gold plated electrodes for optimal electrical contact and to avoid oxidation of the electrodes. For demanding applications, it might be necessary to have both contacts gold plated.

Wires

Shear actuators are typically delivered without wires, as the preferred connection method is a mechanical contact to the gold-plated electrodes. We currently have these options:

Noliac - Your Piezo Partner

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Performance Dimensions
Value
Max operating voltage / V
Min
Min free stroke / µm
Min
Min estimated blocking force / N
Min
Min
Max
Length or outer diameter / mm
Min
Max
Width or inner diameter / mm
Min
Max
Max height / mm
Max
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  • Plate stacks
  • Ring actuators
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  • Ring benders
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  • Shear stacks
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  • Damage tolerant stacks
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