Unlike electromagnetic actuators, Dielectric Elastomer Actuators (DEAs) can exert a static holding force without consuming a significant amount of power. This is because DEAs are electrostatic actuators where the electric charges exert a Maxwell stress. A charged DEA stores its electrical energy as potential energy, in a similar way to a capacitor. To remove or reduce the Maxwell stress, the stored charge with its associated electrical energy must be removed. Current DEA driver electronics simply dispose of this stored electrical energy. If this energy can be recovered, the efficiency of DEAs would improve greatly. We present a simple and efficient way of re-using this stored energy by directly transferring the energy stored in one DEA to another. An energy transfer efficiency of approximately 85% has been achieved.

Date Published: 3 April 2012
PDF: 7 pages
Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 834015 (3 April 2012); doi: 10.1117/12.915472

Published in SPIE Proceedings Vol. 8340:
Electroactive Polymer Actuators and Devices (EAPAD) 2012
Yoseph Bar-Cohen, Editor(s)