Dielectric elastomer pumps are becoming increasingly important for fluid transportation applications, but their efficiency and control remain key challenges. This study presents a novel approach to overcome them. The proposed design utilizes the concept of resonance optimization - an effective method of enhancing the performance of dielectric elastomer pumps by exploiting their inherent resonant frequencies. The mechanical design is systematically chosen so that the resonance of the system matches the operating frequency of the pump. If a corresponding electric field is applied, this significantly increases the efficiency of the pump by amplifying the resonance.
The demonstrator shows how the systematic selection of mechanical design elements - including pump chamber, pump diaphragm geometry, base mechanism and the design of the dielectric elastomer - in combination with resonance optimization and self-developed electronics leads to an optimized pump. This is capable of efficiently handling various load forces and aims to achieve an absolute pressure of 400 mBar.
Dielectric elastomers (DEs) are characterized by exceptional properties such as high-frequency operation, high energy efficiency and the flexible adaptation of their geometry to specific applications. By utilizing these features, this innovative approach opens up new possibilities for fluid transport technologies and makes it an ideal candidate for the development of new fluid transport technologies.
(Photo: © Oliver Dietze)