A Bearingless Slice Motor with a Solid Iron Rotor for Disposable Centrifugal Blood Pump

Shinshi, Tadahiko; Yamamoto, Ryo; Nagira, Yoshiki; Asama, Junichi

doi:10.23919/ipec.2018.8507475

Cited by 9 publications

(1 citation statement)

References 7 publications

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“…However, the BELSMs always use more than five amplifiers to control suspension and rotation, and disposable rotors with permanent magnets (PMs), leading to high costs. Previously, a homopolar bearingless switched reluctance slice motor (BLSRM) with a PM-free rotor was proposed [1]. It achieves low disposable cost due to its pure-iron rotor.…”

Section: Introductionmentioning

confidence: 99%

A Heteropolar Bearingless Slice Motor with PM-free Rotor for Disposable Centrifugal Blood Pump

He¹,

Sugita²,

Shinshi³

2022

Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022)

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To achieve sufficient rotational torque and simple control of the levitated blood pump impeller, we develop a novel heteropolar 12/8 slot/pole bearingless slice motor with permanent magnets (PMs) free rotor. The bearingless motor adopts separated winding configurations, including three-phase motor windings (U, V, W) and two-phase suspension windings (a,b) in the heteropolar design. Due to the unique locations of the suspension windings on the yokes and the four-pole stationary biased flux, the radial force is produced regardless of the rotor angle, leading to a simple control diagram and the minimum number of amplifiers. Therefore, while being rotated, the rotor can be actively positioned in the radial directions with two independent controllers. We fabricate a prototype to prove the validity of the design. The bearingless slice motor reaches a rotational speed of 3,500 rpm without contact.

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Section: Introductionmentioning

confidence: 99%