Demagnetizing Coil - Circuit design | Eng-Tips
2002年2月4日 · Plugging in a coil salvaged from a monitor without this posistor in series is going to result in a very hot coil in a very short time. However, if you do use the posistor, the amount of demagnetizing will likely be too weak or too short to do the job well. Get hold of a proper technician's TV degaussing coil.
Degausing/Demagnetizer Coil Driver Design - Eng-Tips
2003年8月24日 · However Due to the Inductance of the coil an AC power line frequency I cannot get a high enoungh AC current in the coil to reach sufficent magnetic field strength required. Some professional demagnetizer's use a "Ringing Circuit" to achieve this demagnetizing function - but I do not know how to go about making this circuit - any idea's ?
why the high speed steel (M2/M42) can attract steel lile a ... - Eng …
2007年2月1日 · A whole bunch of small machined parts can be run through the demagnetizing coil on a belt, but each little part is almost certain to be at a different position and orientation. That might matter to the final magnetic field. If it matters at all.
demagnetizing and remagentizing a servo motor - Eng-Tips
2004年8月27日 · Particularly for rare-earth magnet types that you might find in a modern brushless-dc motor (samarium-cobalt or neodymium-iron-boron) and to a lesser extent ferrite types, the magnetizing force required is very high and requires a current pulse magnetizer with a specially designed fixture (magnetizing coil).
Demagnetizing Unit - Electric power & transmission & distribution
2010年2月4日 · OK, that dependes on how you define 'single phase'. Assuming again ('scuse me Jeff) that it is a device with two terminals that are connected to two phases and run from 480+ V it seems to me that he coil part of it draws more current than it is expected to and that the 70 kvar capacitor doesn't compensate as it should.
High Powered Demagnetizer - Electrical Engineering general
2007年6月23日 · If there's just a coil, it would probably work better at 240V. At least it might work better until it got so hot that it melted itself down. Many of them have a PTC in series to limit the current. Rich, you might have more success if you Google "degaussing" rather than "demagnetizing".
choking off magnetic permanent magnetic 'pull' with …
2009年6月3日 · Think of (loosely) a guitar pickup...permanent magnet on the bottom, a coil with a steel core. This results in a 'throw' (for want of a better word) of magnetic field from the top of the pickup. What I want to do is augment & retard that magnetic 'throw' by way of running an AC current through the coil.
Need To Demagnetize Production Machine - Eng-Tips
2002年10月28日 · demag is a rough thing for one useing non magnetic mounts, bushings, and housings will reduce the effect of the motors magnets on the frame of you equipment. degaussing on monitors for computers are done with a simple circular coil as odd as it may sound a monitor degausser might just do the trick tho it involves running that coil over the surface of the affected areas of the equipment.The ...
Pemanent Magnets - a bit confused about BH curves 4 - Eng-Tips
2005年3月27日 · The trick to use a permanent magnet as though it is a magneto motive force similar to an iron inside the coil amper-turns is to put the axes in the Hc point. Thereby moving the B-H curve of the magnet to the first quadrant.
Demagnetizing Transformer Cores - Electric power ... - Eng-Tips
2013年6月3日 · It must be demagnetizing. The Dc current required to demagnetize the core is 1.414 times the RMS value of rated excitation current which will be less than 0.5 % of rated full load current. RE: Demagnetizing Transformer Cores