Senior Design 2004/5: Group 10
Permanent Magnetic Return Torque Micro Bearing
John Anderson
Scott Kruse
Jacob Reese
Jared Smith
Cherrod Williams
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The outter shell and inner rotor of our prototype was constructed using Fused Deposition Modeling ( FDM) with ABS plastic. This rapid prototyping method allows for easy creation of 3-D models.
The magnets used in our design have a parallelogram cross-section (as aeen above). This geometry is hard to acchieve, not to mention the extra difficulty of cutting magnetic material. We decided to use small powerful magnets that could be place in a resin mold to model the design's magnetic material. Two small Grade 38 Neodymium magnets were placed in each mold. The correct relationship between magnetic material and magnet size was found using Buckingham's Pi Theorem in order to validate our scaled design.
Once all the pieces of the prototype were created assembly could begin. In the above picture, Cherrod is holding the inner rotor and Jacob has to outter shell. The pieces were painted and put together to yield our final prototype.
