Comments on: More perpetual motion - with video this time! http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/ the blog that is not dansdata.com Wed, 16 May 2012 22:43:10 +0000 http://wordpress.org/?v=1.5.1-alpha by: evilspoons http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/#comment-2069 Mon, 11 Feb 2008 05:04:02 +0000 http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/#comment-2069 I've taken a university-level course on AC and DC motors, magnetic circuits, and the like, and I am certain that some basic circuit analysis would show why this experiment is completely pointless. Essentially, he's moving (some of) the back EMF to a different location, but due to the whole equal-and-opposite-reaction thing, it's extremely doubtful it can be made to do any *useful* work (i.e. increase efficiency). I don't remember enough specifics (the inner workings of electric motors are an extraordinarily dry subject in my mind) but the one thing I do recall is we *always* took measurements that would allow us to calculate efficiency and I don't see anything here to do that, thus making the whole exercise completely pointless. Call me back if a manufacturer picks up this guy's idea, but I don't think they're going to. I've taken a university-level course on AC and DC motors, magnetic circuits, and the like, and I am certain that some basic circuit analysis would show why this experiment is completely pointless. Essentially, he's moving (some of) the back EMF to a different location, but due to the whole equal-and-opposite-reaction thing, it's extremely doubtful it can be made to do any *useful* work (i.e. increase efficiency).

I don't remember enough specifics (the inner workings of electric motors are an extraordinarily dry subject in my mind) but the one thing I do recall is we *always* took measurements that would allow us to calculate efficiency and I don't see anything here to do that, thus making the whole exercise completely pointless. Call me back if a manufacturer picks up this guy's idea, but I don't think they're going to.

]]> by: JG http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/#comment-2061 Sat, 09 Feb 2008 10:29:50 +0000 http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/#comment-2061 From my fairly rusty understanding of electric motors, its been a while, I'm fairly sure this is a load of codswallop, I don't think back EMF will do what he wants it to be doing From my fairly rusty understanding of electric motors, its been a while, I'm fairly sure this is a load of codswallop, I don't think back EMF will do what he wants it to be doing

]]> by: Ziggyinc http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/#comment-2057 Fri, 08 Feb 2008 18:02:14 +0000 http://dansdata.blogsome.com/2008/02/08/more-perpetual-motion-with-video-this-time/#comment-2057 I noticed that he doesn't even mention the word Current, nor with his overly elaborate setup seem to be monitoring current at all. I noticed that he doesn't even mention the word Current, nor with his overly elaborate setup seem to be monitoring current at all.

]]>