Magnetically levitated motor for rotary blood pumps

Area of Science:

• Biomedical Engineering
• Mechanical Engineering

Background:

• Noncontact rotary pumps are crucial for artificial heart applications, offering high efficiency and preventing thrombus formation.
• Magnetic bearings are widely used in these pumps to support rotors, but require complex control and separate driving motors.

Purpose of the Study:

• To introduce two novel types of levitated motors that integrate rotary motor and magnetic bearing functions.
• To present these motors as compact, efficient solutions for artificial blood pumps, replacing traditional contact components.

Main Methods:

• Development and theoretical analysis of radial and axial type levitated motors.
• Experimental validation of the proposed motor designs for artificial blood pump applications.

Main Results:

• The radial type levitated motor offers a compact design with 2-degree-of-freedom control (x and y directions).
• The axial type levitated motor provides 1-degree-of-freedom control (z direction).
• Experimental tests demonstrated the motors' functionality and suitability for rotary blood pumps.

Conclusions:

• Levitated motors integrating rotary motor and magnetic bearing functions show significant potential for advanced artificial blood pump designs.
• These integrated designs offer advantages in size reduction and component simplification for noncontact rotary pumps.