--- On Sat, 8/8/09, Horace Heffner <[email protected]> wrote: > This is a bit of a surprise. I would have thought > with that much current it would have had at least some sign > of working. I guess there is probably more inherent > friction.
It could be. Didn't feel like there was any more difficulty in spinning the shaft/flywheel than with the ball bearing version, but that could change when current is applied. Arcing over greater surface area (cylinder-to-race versus sphere-to-race)? > Just to be sure the parts were all magnetic it might be > worthwhile to check them with a magnet. If you don't > have a magnet small enough, then a cut off flat head nail > stuck to a good magnet can make for a handy tester. Do have some small NIB magnets. All parts of the bearing are magnetic, including the cage and rollers. Same as the ball bearings. > Thanks for doing that experiment. It is further > confirmation that the source of torque for the Marinov Ball > Bearing Motor is hysteresis, and that there really is > nothing "Marinov" about it. No problem. If I was healthier, I would do more experimentation, but after working 8 hours as a mechanic, I tend to come home extremely fatigued and in great pain. A bummer that there are many around me who are able bodied, but whose life ambition is to play video games. Such is life. I still find the motor interesting, because everyone wrote it off as a thermal thing. This seems, as you suspect, to be magnetic, albeit in a different way than expected. It also dumbfounds people I show it to, so that's a nice plus. :) If I find brass bearings, I will get some and try them. One of my close friends is a machinist. He might have a way of finding out. --Kyle
