Design and Analysis of a Bearingless Permanent-Magnet Motor for Axial Blood Pump Applications

Wang, Fangqun; Zhu, Yongchun; Wang, Hao; Zhao, Dong

doi:10.1109/access.2019.2959633

Cited by 12 publications

(6 citation statements)

References 18 publications

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“…From Figures 12,15,16, and 17, it can be concluded that the resultant radial force is about zero when the rotor is at the center, while the radial force is unsymmetrical. The resultant have high values when the rotor is displaced.…”

Section: Resultsmentioning

confidence: 95%

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Eccentricity Effect on Radial Forces of Bearingless BLDC Motor: Study and Analysis

Yousif¹,

Mohammed²,

Ali³

2022

ETJ

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Section: Resultsmentioning

confidence: 95%

“…Figure 6 shows the 2-D FE model with a flux density plot. The motor is analyzed under underrated working conditions [15].…”

Section: Bldc Machine Modelmentioning

confidence: 99%

Eccentricity Effect on Radial Forces of Bearingless BLDC Motor: Study and Analysis

Yousif¹,

Mohammed²,

Ali³

2022

ETJ

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“…In the state -of-the-art VADs, there are two types of noncontact bearings: hydrodynamic bearings (Wang et al, 2020;Magari andHijikata, Journal of Advanced Mechanical Design, Systems, andManufacturing, Vol.16, No.3 (2022) Yamane et al, 2007) and active magnetic bearings (Greatrex et al, 2010;Habermann and Liard, 1980;Komori and Yamane, 2001;Osa et al, 2015;Weißbacher et al, 2010). In a hydrodynamic bearing system, the impeller is suspended by fluid forces generated in thin blood films between the impeller and pump housing (Fukushima et al, 2018;Aaronson et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Proposition of a passive levitation system utilizing thrust and magnetic force for a ventricular assist device

Magari

Hijikata

2022

JAMDSM

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For circulation support in patients with heart disease, a miniaturized implantable ventricular assist device (VAD) is required. However, several issues such as hemolysis and miniaturization need to be addressed. The objective of this study is to develop a passive levitation system for an impeller with a large gap without active control. The large gap prevents blood damage, and passive levitation contributes to the miniaturization of the VAD. In this study, a new passive levitation system utilizing thrust and magnetic force is proposed. The thrust generated by the rotation of the impeller changes depending on the interaction between the housing geometry and impeller position, even with a large gap. Considering this characteristic, the impeller was levitated by balancing the magnetic force generated by the permanent magnets and the thrust in the axial direction. The movements in the radial and angular directions are passively supported by the restoring force and torque generated by the permanent magnets. The thrust was calculated using computational fluid dynamics, and the pump was designed such that the thrust changes according to the axial displacement of the impeller. The magnetic force generated by the permanent magnets was calculated using finite-element method 3D magnetic field analysis. In addition, the required current density flowing into the coil to rotate the impeller is calculated. The levitation of the impeller was confirmed by combining the results of the analyses. The results show that the motor torque should be improved. In conclusion, this study demonstrates the feasibility of a novel levitation system for implantable miniaturized VADs.

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“…M UCH attention is currently given to FSPMSMs to equip a variety of applications covering a wide range of power, from medical actuators and household appliances till wind turbines, going through electric and hybrid vehicles [1]- [5]. The great interest in FSPMSMs is motivated by [6]- [11]: (i) their low copper losses, (ii) their reduced cogging torque, (iii) their wide flux weakening range, and (iv) and their high fault tolerance capability thanks to their low mutual inductance.…”

Section: Introductionmentioning

confidence: 99%

Fractional-Slot PMSMs With One Coil Parallel Branches Made Phases—Part I: Investigation Study

et al. 2021

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This work proposes an approach to design fractional-slot permanent magnet synchronous machines (FSPMSMs) equipped with phases made up of one coil parallel branches. These machines exhibit attractive potentialities, especially their enhanced open-circuit fault tolerance capability. Beyond their intrinsic fault tolerance, an open-circuit affecting the targeted topologies leads to a torque step-down limited to the one developed by the concerned coil rather than the torque produced by the total phase in FSPMSMs equipped with phases made up of series-connected coils. Furthermore, these topologies are suitably-adapted to low-voltage power supply that makes them viable candidates in automotive applications. This potentiality is by far vital in battery electric vehicles with the risk of electrocution in case of accident totally-eradicated thanks to the reduction of the DC bus voltage. Part 1 of the developed work is aimed at a star of slots-based identification and topological characterization of the FSPMSMs enabling the arrangement of the armature phases according to one coil parallel branches. The study distinguishes the topologies with odd and even number of phases, arranged in single-and double-layer slots. A case study is treated using a 2D finite element analysis and validated by experiments.INDEX TERMS Fractional-slot permanent magnet synchronous machines, phases arranged in one coil parallel branches, start of slots approach, odd and even number of phases, single-and double-layer slots.

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Design and Analysis of a Bearingless Permanent-Magnet Motor for Axial Blood Pump Applications

Cited by 12 publications

References 18 publications

Eccentricity Effect on Radial Forces of Bearingless BLDC Motor: Study and Analysis

Eccentricity Effect on Radial Forces of Bearingless BLDC Motor: Study and Analysis

Proposition of a passive levitation system utilizing thrust and magnetic force for a ventricular assist device

Fractional-Slot PMSMs With One Coil Parallel Branches Made Phases—Part I: Investigation Study

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