Re: electromagnet OPENING a door
- From: Jasen Betts <jasen@xxxxxxxxxxxxxxxxxx>
- Date: Sat, 03 Dec 2005 07:21:12 -0000
On 2005-12-01, Sammy Taylor <sammytaylor@xxxxxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> I'm building a small safe with an electronic strike (i.e., latch). When a
> timer activates,
> the strike releases. I want the door to pop open, and using a spring is
> awkward. I thought a simple electromagnet might work. Can somebody suggest a
> geometry.
>
> Cheap strong electromagnets seem to be of the U-shaped variety. Can I use
> one
> of these and a permanent magnet to repel each other?
yes if you can get a magnet with the correct configuration and of the
correct strength, too weak and the electromagnet will attract it, too strong
and it will stick to the electromagnet
(I can't use two
> permanent magnets because the pre-load on the strike can be enough to
> prevent it from opening.)
here's some other ideas. use the the electromagnet to hold the door shut
while you trigger the strike, and then release it and let the spring open
the door.
use a push-type solenoid to nudge the door open when you trigger the
strike
replace the strike with one with a stronger solenoid, or replace the
solenoid etc...
Use a central locking actuator to operate the latch or to nudge the door.
hmm, thinking automotive, don't some vehicles have electricly opened fuel
flaps?
Bye.
Jasen
.
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- electromagnet OPENING a door
- From: Sammy Taylor
- electromagnet OPENING a door
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