Timeline for Electrical behavior of holding magnets when you pull them apart
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 9, 2015 at 1:06 | history | edited | Ed Krohne | CC BY-SA 3.0 |
added 1302 characters in body
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| Dec 21, 2014 at 5:17 | vote | accept | Ed Krohne | ||
| Dec 6, 2014 at 13:22 | comment | added | GR Tech | @EdKrohne Very application demand with foggy description. Definitely, there is a pricise answer after you clarify the question | |
| Dec 6, 2014 at 12:13 | comment | added | Ed Krohne | @GRTech these holding magnets are definitely used for electronic locks, sure. The strike plate is just a hunk of ferromagnetic material that the electromagnet can hold to. So yes, you can put the strike plate on your door, and the electromagnet on your doorframe, and create a lock that way. In that case, the strike plate is like the latch. | |
| Dec 6, 2014 at 12:11 | comment | added | Ed Krohne | Three totally different answers so far. I'll need to think on this. Clearly, the zener is the most conservative option. | |
| Dec 5, 2014 at 16:08 | comment | added | GR Tech | Strike plate is a kind of door-latch?? | |
| Dec 5, 2014 at 13:15 | answer | added | Andy aka | timeline score: 2 | |
| Dec 5, 2014 at 13:11 | answer | added | sweber | timeline score: 4 | |
| Dec 5, 2014 at 10:57 | comment | added | Nick Johnson | Work is done when you pull two stationary magnets apart too: the energy is in the form of increased potential energy between the two magnets. I don't think it's any different if one or both parts are electromagnets. | |
| Dec 5, 2014 at 10:13 | comment | added | Ed Krohne | catalog.apwcompany.com/viewitems/electromagnets/…? Here it is. Pass current through it, and it turns into a magnet which can hold to a strike plate (also linked on that page). They can be used to pick up and release anything with a strike plate mounted on it. | |
| Dec 5, 2014 at 10:01 | comment | added | diverger | Umm, English is not my native language, can you tell more detail about "holding magnet", or some links are just OK.:) | |
| Dec 5, 2014 at 9:50 | comment | added | Ed Krohne | Well, I believe I'd want a scope for that, and I've never used one. The one I'd be using would not be mine, and so I'd REALLY rather not damage it. How big are EMF kickbacks? I could start with a Megohm:Ohm voltage divider and work my way down, but I'm not even sure these voltages won't make the resistors fail short. I'm really out of my depth. I'd be happy to test and report back if I had some advice on a process. | |
| Dec 5, 2014 at 6:26 | history | tweeted | twitter.com/#!/StackElectronix/status/540754106470924288 | ||
| Dec 5, 2014 at 6:03 | comment | added | Roger Rowland | Good question, to which I don't know the answer, but have you tried measuring what happens? | |
| Dec 5, 2014 at 5:44 | history | asked | Ed Krohne | CC BY-SA 3.0 |