P11021: Reducing VAD electronic package size


Project Summary Project Information

The current left-ventricle assist device (LVAD) system is centered around a custom, levitating impeller blood pump for use in human patients with cardiac disease to boost blood flow. The main unique feature of the blood pump is its ability to magnetically levitate the impeller within the pump's housing, drastically reducing friction losses and increasing pump lifetime.

The purpose of the project is to miniaturize the system such that it can be scaled to more portable configurations, eventually for use in human patients. As a life-critical system, it must be highly reliable and safe. Since this system is still in development, our end-user is both the human patients as well as the physicians and engineers involved in its further development. To this end, our system will provide low-level access to the control system including the ability to re-program and re-configure.

The current pump consists of the magnetic levitation coils, a three phase motor to spin the impeller, and several hall-effect sensors to sense the position of the front and back of the impeller. To keep the pump levitating, the force applied by the magnetic coils are constantly readjusted to compensate for positional error.

The control system is consists of a microcontroller connected to analog-to-digital converters for the hall effect sensors and motor control circuitry for the coils and the 3-phase motor. This microcontroller must be powerful enough to handle the control algorithm which keeps the pump levitating and rotating. Power is provided from a battery pack on the outside of the body. The entire external assembly needs to be robust to water splashes, drops from approximately hip level to floor, and regular human movement.

Project Name
Reducing VAD electronic package size
Project Number
Project Family
Biomedical Device Development
Assistive Devices and Bioengineering
Start Term
2010-1 Fall
End Term
2010-2 Winter
Faculty Guide
Edward Hanzlik
Primary Customer
Dr. Steven Day
Project Members
Andrew Hoag (CE)
Juan Jackson (EE)
Smiha Sayal (IE)
Zachery Shivers (EE)
Nicole Varble (ME)
Jason Walzer (ME)
P11021 Team Photo

P11021 Team Photo

Public Team Files & Documents


http://edge.rit.edu/content/P11021/public/images/web.png Staffing Requirements

http://edge.rit.edu/content/P11021/public/images/web.png Team Values and Norms

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Concept Level Design

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http://edge.rit.edu/content/P11021/public/images/excel.gif System Concept Selection

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System Level Design
Electrical Mechanical Software

http://edge.rit.edu/content/P11021/public/images/excel.gif Microcontroller Selection

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http://edge.rit.edu/content/P11021/public/images/excel.gif Bill of Materials

http://edge.rit.edu/content/P11021/public/images/word.gif Electronics Testing Procedures

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Enclosure Inventor files

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http://edge.rit.edu/content/P11021/public/images/word.gif IP Codes

Water Ingress Test Results

http://edge.rit.edu/content/P11021/public/images/pdf.gif Software Development Plan/Software Design Document (v1.1)

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http://edge.rit.edu/content/P11021/public/images/pdf.gif Software Testing

http://edge.rit.edu/content/P11021/public/images/web.png 3rd Party Libraries and Tools

http://edge.rit.edu/content/P11021/public/images/web.png Controller Source

http://edge.rit.edu/content/P11021/public/images/web.png Client Source

Private Team Files & Documents

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http://edge.rit.edu/content/P11021/public/images/web.png Order form archive