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Gerhard Fiedler wrote:

>Hello all,
>
>I'm looking into moving a lever with a solenoid. It's around 5 Nm torque
>and I need to move it 30 degree from a center position in both directions.
>It comes back to the center position through its own spring force. My
>thought was to use two solenoids and a lever of around 3 cm. That would
>give a throw of 17 mm in each direction and a force of 150 N. It seems
>that's something a solenoid can do. Needs to be for 12 V.
>
>However, I didn't yet find a manufacturer of such solenoids in the USA.
>Does anybody know some places I can start asking? The only one I found so
>far is Kendrion http://www.kendrionmt.com/ , but they are in Europe.
>
>I'm also looking into using starter solenoid coils. They probably only need
>a steel rod added to them that they can pull. That may work.
>
>The other question is how to switch such solenoids. From the Kendrion site
>and the solenoid data sheets I found there, I imagine that it may take up
>to 60 A to get the force I need. This doesn't seem impossible to switch
>with MOSFETs or IGBTs, but I wonder how you get that current to and from
>the transistor. A 10 A trace is already large. We don't really need a high
>duty cycle, so maybe that works out, temperature-rise-wise. I was just
>wondering... are there any special tricks to it? Even connecting the thick
>wire to a circuit board seems tricky.
>
>Thanks for any pointers,
>Gerhard
>  
>
You might want to look into the solenoids for electric door locks on cars.



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