szaxx, In case you are not already familiar.... Please research the difference between 'passive' and 'active' magnetic bearings. The ones you have described, with the controls, fall under active magnetic bearings. This is technology used today in the specialized machining and other industries. Passive magnetic bearings (no controls or required extra energy) are uncommon but also used today. Here is a link to one of my favorite designs: http://www.magnetal.se/ . They use a hybrid that employs the use of homo-polar discs to aid in stability and loading capabilities. I am interested in your thoughts about the use of high-voltage to design a magnetic bearing
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