Electrodynamics of Axial-Flow Rotary Blood Pumps

Igor V. Nesterenko; Alexander A. Pugovkin; Steffen Leonhardt; Marian Walter; Patrick Borchers; Aleksandr Markov; Jamshid H. Karimov; Sergey V. Selishchev; Dmitry V. Telyshev

doi:10.1109/ACCESS.2021.3133803

IEEE Access (Jan 2021)

Electrodynamics of Axial-Flow Rotary Blood Pumps

Igor V. Nesterenko,
Alexander A. Pugovkin,
Steffen Leonhardt,
Marian Walter,
Patrick Borchers,
Aleksandr Markov,
Jamshid H. Karimov,
Sergey V. Selishchev,
Dmitry V. Telyshev

Affiliations

Igor V. Nesterenko: ORCiD; Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, Russia
Alexander A. Pugovkin: ORCiD; Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, Russia
Steffen Leonhardt: ORCiD; Medical Information Technology, Helmholtz Institute of Biomedical Engineering, RWTH Aachen University, Aachen, Germany
Marian Walter: ORCiD; Medical Information Technology, Helmholtz Institute of Biomedical Engineering, RWTH Aachen University, Aachen, Germany
Patrick Borchers: Medical Information Technology, Helmholtz Institute of Biomedical Engineering, RWTH Aachen University, Aachen, Germany
Aleksandr Markov: ORCiD; Institute for Bionic Technologies and Engineering, I. M. Sechenov First Moscow State Medical University, Moscow, Russia
Jamshid H. Karimov: Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
Sergey V. Selishchev: Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, Russia
Dmitry V. Telyshev: ORCiD; Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, Moscow, Russia

DOI: https://doi.org/10.1109/ACCESS.2021.3133803
Journal volume & issue: Vol. 9
pp. 164700 – 164711

Abstract

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In this work, electric machine of implantable rotary blood pumps (RBPs) of axial-flow type was theoretically investigated. Electromagnetic coupling of rotor and stator in axial-flow RBPs was described with the Maxwell’s equations of the classical electrodynamics given quasi-magnetostatic approximation of electromagnetic field in the simplified model consisting of permanent magnet and conductive loop rotating in free space with one spatial degree of freedom. Additionally, relative field error, created by the neglect of geometric deviations introduced through manufacturing tolerances, was estimated for a typical axial-flow RBP. Upper limit of error introduced by the simplifications was estimated less than 0.2 %, leading to the finite accuracy of the description and clearly determining the influence on the control signal. Based on the presented description and additional engineering considerations, the electric machine of axial-flow RBPs was defined as a three-phase non-salient pole synchronous machine with a permanent magnet rotor. Two key features were shown: a) unlike the conventional electric motors, signal of back electromotive force tends to be a sinusoidal waveform in any construction of axial-flow RBP with significant non-magnetic gap; b) the optimal waveform of control signal in this case is sinusoidal. Initial design and control parameters of the electric machine in axial-flow RBPs can be accurately determined with presented theoretical description. Based on the description, control system of an axial-flow RBP with the optimal waveform of control signal can be developed.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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