Self-sensing of Dielectric Elastomer Actuators Using High Frequency AC Signal

Author(s):  
Masahiro HIBI ◽  
Akio YAMAMOTO ◽  
Kazumasa BABA ◽  
Hiromitsu TAKEUCHI
Author(s):  
Ardi Wiranata ◽  
Makoto Kanno ◽  
Naoki Chiya ◽  
Hozuma Okabe ◽  
Tatsuhiro Horii ◽  
...  

Abstract To increase safety and reduce the electric circuit cost, Dielectric elastomer actuators (DEAs) must operate below the kV range. The simplest strategy to reduce the voltage operation is to decrease the dielectric elastomer membrane thickness. This research aims to demonstrate DEAs with a nanometric uniform thickness that can operate at a low voltage (below 70 V) and a high frequency. We use the roll-to-roll process to fabricate a 600-nm-thick stretchable PDMS (polydimethylsiloxane) nanosheet and a 200-nm-thick conductive nanosheet. These nanosheet-DEAs are tested in high-frequency operations of DC voltage below 70 V and in a frequency range of 1–30 kHz.


Author(s):  
C. Vidhya ◽  
V. Ravikumar ◽  
S. Muralidha

: The objective of this paper is to implement an ac link universal power converter controlled BLDC motor for medical applications. The ac link universal power converter is a soft switched high frequency ac link converter, created using the parallel combination of an inductor and a capacitor. The parallel ac link converter handle the ac voltages and currents with low reactive ratings at the link and offers improved power factor, low power consumption, more efficiency and less weight on comparison with the traditional dc link converter. Because of the high throughput, BLDC motors are preferred widely medical applications. A modulation technique called Space Vector Pulse Width Modulation (SVPWM) is used to generate the three phase power for the BLDC motors from the input DC supply. To validate the proposed system, simulations are performed in MATLAB – Simulink and an experimental prototype is constructed to supplement the simulation results.


Author(s):  
Fredi Z. Ferrigolo ◽  
Diego B. Ramos ◽  
Jeferson M. Correa ◽  
Felix A. Farret ◽  
Luciano P. Lima

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