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Encapsulated multi-layer actuators with improved heat dissipation

20 April 2014

PI Ceramic now offers encapsulated actuators with improved heat dissipation properties. A casting compound that does not impair the actuator displacement replaces the inert gas in the hollow space between the metal bellows and piezo actuator.

Additional cooling of the stainless steel casing - using compressed air or water, for example - can support heat dissipation from the dynamically operating actuator.

This enables working frequencies to be achieved that are ten times higher than with an actuator without casting compound (the P-885.95 can be run at 3.5kHz over the full travel range of 36µm, for example).

These multi-layer piezo actuators are available in sizes Ø 11.2mm × 40.5 mm for 30µm travel, and Ø 11.2 mm × 22.5mm for 14µm travel.

Higher forces can be achieved with a version measuring Ø 18.6 mm × 22.5mm providing a minimal displacement to 14µm. For these dimensions, the actuators with casting compound are available at short notice. 

The actuators can be manufactured in other sizes to order.


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