For this purpose, 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 metal bellow and piezo actuator.
An additional cooling of the stainless-steel casing, e.g. with compressed air or water, can support to dissipate the heat generated by the dynamically operating actuator. This allows to achieve working frequencies that are ten times higher than with an actuator without casting compound, for example, up to 3.5kHz with the P-885.95 over the full travel range of 36µm.
PI Ceramic produces the encapsulated multilayer piezo actuators in the sizes Ø 11.2mm × 40.5mm for 30µm travel and Ø 11.2mm × 22.5mm for 14µm travel. Higher forces can be achieved with a version measuring Ø 18.6mm × 22.5mm providing a minimal displacement to 14µm. For these dimensions, the actuators with casting compound are available at short notice.
On request, the encapsulated PICMA® stack multilayer piezo actuators can be manufactured in other sizes.