Test Controller Design, Implementation, and Performance for a Magnetic Suspension Continuous Flow Ventricular Assist Device
A new continuous flow ventricular assist device using full magnetic suspension has been designed, constructed, and tested. The magnetic suspension centers the centrifugal pump impeller within the clearance passages in the pump, thus avoiding any form of contact. The noncontact operation is designed...
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Published in | Artificial organs Vol. 23; no. 8; pp. 785 - 791 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Boston, USA
Blackwell Science Inc
01.08.1999
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Subjects | |
Online Access | Get full text |
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Summary: | A new continuous flow ventricular assist device using full magnetic suspension has been designed, constructed, and tested. The magnetic suspension centers the centrifugal pump impeller within the clearance passages in the pump, thus avoiding any form of contact. The noncontact operation is designed to give very high expected mechanical reliability, large clearances, low hemolysis, and a relatively small size compared to current pulsatile devices. A unique configuration of magnetic actuators on the inlet side and exit sides of the impeller provides full 5 axis control and suspension of the impeller. The bearing system is divided into segments which allow for 3 displacement axes and 2 angular control axes. The controller chosen for the first suspension tests consists of a decentralized set of 5 proportional integral derivative (PID) controllers. This document describes both the controller and an overview of some results pertaining to the magnetic bearing performance. The pump has been successfully operated in both water and blood under design conditions suitable for use as a ventricular assist device. |
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Bibliography: | ark:/67375/WNG-ZNT48SQ7-2 istex:6537ED29B2065F462626218975CDD3F9C5EDED0B ArticleID:AOR6424 Presented in part at the 6th Congress of the International Society for Rotary Blood Pumps, July 25–27, 1998, in Park City, Utah, U.S.A. |
ISSN: | 0160-564X 1525-1594 |
DOI: | 10.1046/j.1525-1594.1999.06424.x |