Active magnetic bearing system for blood pump

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

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604131, 4174231, 4174237, A61M 3700

Patent

active

061266388

ABSTRACT:
An implantable rotary blood pump including a rotor mounted for rotation within a pump housing. The rotor has a shaft portion and an impeller carried by the shaft portion. A rotor motor is provided, with the motor including a plurality of permanent magnets carried by the impeller and motor stators on opposite sides of the impeller. The motor is operable to transmit torque and also to provide an axial magnetic force that acts as an axial bearing.

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C. Peter Cho et al.; Eddy Current Loss Calculation in the Permanent Magnet of a Large Horse Power Axial-Field Motor; Jun. 14, 1994; Proceedings, Twenty-third Annual Symposium, Incremental Motion Control Systems & Devices, pp. 245-253.
C. Peter Cho et al.; Cogging Torque Reduction, Axial Force Variation, and Output Torque Effect of a High-Power-Density, Axial Field, Brushless, Permanent Magnet Motor; Jun. 6, 1995; Proceedings, Twenty-fourth Annual Symposium, Incremental Motion Control Systems & Devices, pp. 297-307.
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