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5H25.20 - Magnetic Suspension

5H25.20 - Magnetic Suspension

Title5H25.20 - Magnetic Suspension

​Demonstrate that magnetic forces can suspend an object. Demonstrate a feedback controlled system. Demonstrate Active suspension/levitation.

Assembly Instructions

​Obtain the 15VDC 1A power supply, the generative designed stand and wooden base, 1" NdFeB cylindrical magnet, empty Campbell's Tomato soup can,  two banana cables, and a camera with backplane.  Plug the power supply into the wall and connect two banana cables to the power input on the side of the clear acrylic box housing th electronic control circuit. Place the camera viewing the assembly from the side, with a backplane behind the assembly.

Setup Time5
Operation Time5
Preview Time5
Operation Instructions

​Turn on the power supply, and gently lift the magnet or soupcan/magnet into place.

Demo on DimeNo
PIRA 200No
Export Instructions (if different)
HazardsNone, Magnets - Strong Magnets Present

​Active suspension or levitation can be created using an electromagnetic coil and feedback system. In this demo, an electromagnet is controlled by a hall effect sensor which flips the polarity of the electromagnetic ~300-400 times per second. The coil is driven by a half-bridge motor driver with input from a fan driver and hall effect sensor. This is a demonstration of active suspension, where as a superconductor or graphite displays passive suspension or levitation involving no active controls and are material properties alone.  

Category5 Electricity and Magnetism
Subcategory5H - Magnetic Fields and Forces
KeywordsElectromagnet, feedback, systems, magnet, suspension, levitation, active levitation, active suspension, hall effect
Construction Information
The support stand was created by using Autodesk's Fusion360 Generative Design software and 3-d printed here on UM campus. Generative Design uses computers to iteratively evolve structures  that are highly optimized and is referred to as organic geometry resembling what is found in nature by process of evolution.
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5C10.10 - Examples of Capacitors
5C10.20 - Effect of a Dielectric and Spacing on a Capacitor
5C10.u1 - Potential voltage rise in a parallel plate capacitor
5C10.u2 - Variable Parallel Plate Capacitor
Magnetic Suspension Apparatus
banana cable
power supply - 15VDC, 1A
camera - color