Miniaturization of a Magnetically Levitated Axial Flow Blood Pump

Cheng, Shanbao; Olles, Mark; Olsen, Don B.; Joyce, Lyle D.; Day, Steven W.

doi:10.1111/j.1525-1594.2010.01077.x

Cited by 17 publications

(24 citation statements)

References 13 publications

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“…The poles of stator and rotor permanent magnets are opposite to each other so that a closed magnetic bias flux loop that passes between the two PMs and through both the large and small iron of rotor and stator components is formed. The coils of the HMB are wound around the legs of the large stator iron and can augment or diminish this flux loop in the corresponding quadrant of the HMB in the radial directions [19][20]. …”

Section: Methodsmentioning

confidence: 99%

“…4, was used to empirically measure the forces generated by an HMB rotor on the components of an HMB stator. The MBTR, which is described in more detail elsewhere [20], used five high resolution linear stages (Newmark NLS4-25-16-1) to control the position of the rotor: two stages in the x axis direction, two in the y axis direction, and one in the z axis direction.…”

Section: Methodsmentioning

confidence: 99%

“…This study deals with the improvement of hybrid magnetic bearings (HMBs) within an axial flow blood pump, which is a left ventricular assist device and referred to as LEV-VAD, that has been previously developed [10] and whose cross section view is shown in Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of a hybrid magnetic bearing for a magnetically levitated blood pump via 3-D FEA

et al. 2011

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In order to improve the performance of a magnetically levitated (maglev) axial flow blood pump, three-dimensional (3-D) finite element analysis (FEA) was used to optimize the design of a hybrid magnetic bearing (HMB). Radial, axial, and current stiffness of multiple design variations of the HMB were calculated using a 3-D FEA package and verified by experimental results. As compared with the original design, the optimized HMB had twice the axial stiffness with the resulting increase of negative radial stiffness partially compensated for by increased current stiffness. Accordingly, the performance of the maglev axial flow blood pump with the optimized HMBs was improved: the maximum pump speed was increased from 6000 rpm to 9000 rpm (50%). The radial, axial and current stiffness of the HMB was found to be linear at nominal operational position from both 3-D FEA and empirical measurements. Stiffness values determined by FEA and empirical measurements agreed well with one another. The magnetic flux density distribution and flux loop of the HMB were also visualized via 3-D FEA which confirms the designers’ initial assumption about the function of this HMB.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Optimization of a hybrid magnetic bearing for a magnetically levitated blood pump via 3-D FEA

et al. 2011

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“…Shanbao Cheng et al. (52) of the Rochester Institute of Technology, Rochester NY, USA reported on a miniaturization process of a MagLev axial flow blood pump from a functional prototype to a pump suitable for animal trials. Through COMSOL three‐dimensional (3D) finite element analysis and experimental verification, the hybrid magnetic bearings of the pump have been miniaturized, the axial spacing between magnetic components has been reduced, and excess material in mechanical components of the pump was reduced.…”

Section: Cardiac Support and Blood Pumpsmentioning

confidence: 99%

Artificial Organs 2010: A Year in Review

Malchesky¹

2011

Artificial Organs

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In this Editor's Review, articles published in 2010 are organized by category and briefly summarized. As the official journal of The International Federation for Artificial Organs, The International Faculty for Artificial Organs, and the International Society for Rotary Blood Pumps, Artificial Organs continues in the original mission of its founders "to foster communications in the field of artificial organs on an international level."Artificial Organs continues to publish developments and clinical applications of artificial organ technologies in this broad and expanding field of organ Replacement, Recovery, and Regeneration from all over the world. We take this time also to express our gratitude to our authors for offering their work to this journal. We offer our very special thanks to our reviewers who give so generously of time and expertise to review, critique, and especially provide such meaningful suggestions to the author's work whether eventually accepted or rejected and especially to those whose native tongue is not English. Without these excellent and dedicated reviewers the quality expected from such a journal could not be possible. We also express our special thanks to our Publisher, Wiley-Blackwell, for their expert attention and support in the production and marketing of Artificial Organs. In this Editor's Review, that historically has been widely received by our readership, we aim to provide a brief reflection of the currently available worldwide knowledge that is intended to advance and better human life while providing insight for continued application of technologies and methods of organ Replacement, Recovery, and Regeneration. We look forward to recording further advances in the coming years.

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“…The general configuration of a blood pump can cause several problems, including heating, abrasion, and bacterial infections. A magnetically levitated (MagLev) motor for a blood pump was recently developed to achieve a smaller pump size, and to prevent heating and abrasion from the mechanical components, such as the shaft and bearings . In particular, most MagLev technologies for VADs have been used for magnetic bearings or suspension based on a magnetic coupling; a MagLev technology has been applied to Biomedicus BPX‐80 .…”

mentioning

confidence: 99%

Preliminary Validation of a New Magnetic Wireless Blood Pump

et al. 2013

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In general, a blood pump must be small, have a simple configuration, and have sufficient hydrodynamic performance. Herein, we introduce new mechanisms for a wireless blood pump that is small and simple and provides wireless and battery-free operation. To achieve wireless and battery-free operation, we implement magnetic torque and force control methods that use two external drivers: an external coil and a permanent magnet with a DC-motor, respectively. Power harvesting can be used to drive an electronic circuit for wireless monitoring (the observation of the pump conditions and temperature) without the use of an internal battery. The power harvesting will be used as a power source to drive other electronic devices, such as various biosensors with their driving circuits. To have both a compact size and sufficient pumping capability, the fully magnetic impeller has five stages and each stage includes four backward-curved blades. The pump has total and inner volumes of 20 and 9.8 cc, respectively, and weighs 52 g. The pump produces a flow rate of approximately 8 L/min at 80 mm Hg and the power generator produces 0.3 W of electrical power at 120 Ω. The pump also produces a minimum flow rate of 1.5 L/min and a pressure of 30 mm Hg for circulation at a maximum distance of 7.5 cm.

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Miniaturization of a Magnetically Levitated Axial Flow Blood Pump

Cited by 17 publications

References 13 publications

Optimization of a hybrid magnetic bearing for a magnetically levitated blood pump via 3-D FEA

Optimization of a hybrid magnetic bearing for a magnetically levitated blood pump via 3-D FEA

Artificial Organs 2010: A Year in Review

Preliminary Validation of a New Magnetic Wireless Blood Pump

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