Actuator module having a multi-layer actuator arranged in a housing and a continuously extremely low leakage current at the actuator surface

US9478726B2 · kind B2 · utility

Assignee

• CERAMTEC GMBH · DE

Inventors

• Reiner Bindig · Bindlach, DE
• Hans-Jürgen Schreiner · Lauf an der Pegnitz, DE

Key dates

• Filing date: Jan 10, 2013
• Grant date: Oct 25, 2016
• Expiry date: Apr 15, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/50

Abstract

The invention relates to actuator module (22) having a piezoceramic multilayer actuator (1) arranged in a casing (23). In order to avoid an increase in conductivity and hence rising leakage current at the actuator surface even after a long period of use, the invention proposes that the casing (23) is hermetically sealed, and a chamber (24) is arranged between the multilayer actuator (1) and the casing (23), which chamber is entirely or partially filled with a medium (21) that chemically transforms and/or binds water.