English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

In the context of a collaboration between the  Medical University of Vienna , the  Power Electronic Systems Laboratory  of  ETH Zurich , and  Charit&#x00E9; Berlin , the novel implantable total artificial heart (TAH)  ShuttlePump &#x00A0;is currently being developed. Its novel, low-complexity pumping concept requires a compact Linear-Rotary Actuator (LiRA). The Linear Actuator (LA) part was designed, realized, and experimentally verified in previous work, and it can provide a peak axial force of about 45&#x00A0;N with about 8&#x00A0;W of continuous power dissipation. This paper presents the details of the Rotary Actuator (RA) part. This has considerably lower output power requirements (about 100&#x00A0;mW) due to the low operating torque and angular speed (3.1&#x00A0;mNm and up to 300&#x00A0;rpm, respectively). However, the RA is highly constrained spatially, as it needs to be integrated very close to the previously realized LA. This forces a permanent magnet synchronous machine (PMSM) design with a rotor only partially equipped with PMs and stators covering only half of the total circumference, which introduces a considerable cogging component to the total torque. The proposed PMSM is hence optimized using Finite Element Methods (FEM) simulations to select a final design with low power losses and low cogging-induced angular speed ripple. The machine is realized as a hardware prototype, and the experimental measurements confirm that the proposed RA can meet the continuous torque requirement with 324&#x00A0;mW of power losses. The successful implementation of the RA (and LA) finally verifies the practical feasibility of the integrated LiRA and provides the basis for a comprehensive test of the complete  ShuttlePump &#x00A0;in a hydraulic test rig in the course of further research.

Spatially Highly-Constrained Auxiliary Rotary Actuator for a Novel Total Artificial Heart