A study on permanent magnet topologies for hybrid bearings for medical drives applied in Ventricular Assist Devices

• Autorzy: Pohlmann A. , Hameyer K.
• Języki publikacji: EN

Abstrakty

EN

In industrialized countries cardiovascular diseases are the major cause of death. The last clinical therapy option for some patients, suffering from terminal heart diseases, is donor heart transplantation. As the available number of donor organs is decreasing, many patients die while waiting for a transplant. For this reason Ventricular Assist Devices (VADs), which can mechanically support the human heart to achieve a sufficient perfusion of the body, are under development. For an implantable VAD, design constraints have to be deduced from the physiological conditions in the human body. In case of a VAD drive, these constraints are for example dimensions, electric losses, which might result in an overheating of blood, and a long durability. Therefore a hybrid permanent magnet hydrodynamic bearing is designed in this paper, which works passively and contactless. Based on Finite Element simulations of magnetic fields, various permanent magnet topologies are studied in terms of axial forces and stiffness.

Słowa kluczowe

EN

ventricular assist device; VAD; finite element method; FEM; magnetic bearings

PL

urządzenie wspomagające komorę; metoda elementów skończonych; łożysko magnetyczne

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2011
• Tom: Vol. 60, nr 3
• Strony: 371--380
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Pohlmann A.

autor

Hameyer K.

• Institute of Electrical Machines, RWTH Aachen University, Schinkelstrasse 4, D-52056 Aachen, Germany,

Bibliografia

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• [3] Thoratec Cooperation, http://www.thoratec.com/, accessed May (2011).
• [4] Miura H., Arai S., Kakubari Y. et al., Improvement of the transcutaneous energy transmission system utilizing ferrite cored coils for artificial hearts. IEEE J MAG 42(10): 3578-3580 (2006).
• [5] Hoshi H., Shinshi T., Takatani S., Third-generation blood pumps with mechanical noncontact magnetic bearings. The 13th Congress of the International Society for Rotary Blood Pumps, ISRBP, Tokyo (2011).
• [6] Pohlmann A., Lessmann M., Finocchiaro T. et al., Numerical computation can safe life: FEM simulations for the development of artificial hearts. The 14th International Conference on Electromagnetic Field Computation, CEFC, Chicago, USA, May (2010).
• [7] Samuel Earnshaw, On the nature of the molecular forces which regulate the constitution of the luminiferous ether. Transactions of the Cambridge Philosophical Society 7: 97-112 (1842).