Mr. Kun Sun Profile

Kun Sun

Student at Soochow Univ

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Proceedings Article | 23 January 2017 Paper

Dynamic characteristics and mechatronics model for maglev blood pump

Kun Sun, Chen Chen

Proceedings Volume 10322, 1032244 (2017) https://doi.org/10.1117/12.2265531

KEYWORDS: Blood, Fluid dynamics, Actuators, Magnetism, Electromagnetism, Mechatronics, Water, Control systems, Analytical research, Systems modeling

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Magnetic bearing system(MBs) has been developed in the new-generation blood pump due to its low power consumption, low blood trauma and high durability. However, MBs for a blood pump were almost influenced by a series of factors such as hemodynamics, rotation speeds and actuator response in working fluids, compared with those applied in other industrial fields. In this study, the dynamic characteristics of MBs in fluid environments, including the influence of the pumping fluid and rotation of the impeller on the radial dynamic model were investigated by measuring the frequency response to sinusoidal excitation upon coils, and the response of radial displacement during a raise in the speed. The excitation tests were conducted under conditions in which the blood pump was levitated in air and water and with or without rotation. The experimental and simulated results indicate that rotations of the impeller affected the characteristics of MBs in water apparently, and the vibration in water was decreased, compared with that in air due to the hydraulic force. During the start-up and rotation, the actuator failed to operate fully and timely, and the voltage supplied can be chosen under the consideration of the rotor displacement and consumption.

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