Thanks for the comments! I've posted a little more info in another post.
This is to do about one cycle per second. It will spend most of the time
resting at one end of the travel or the other (and still have to supply
the force, though the force will decay over the wait time). A motor and
leadscrew is also being considered, but a voicecoil would be simpler, if
it works. The existing system (not voice coil or lead screw) power
consumption is about 60W, but I'd like to reduce that, if possible.

THANKS for the comments!

Harold


>> Anyone have experience with voicecoil actuators? I have an application
>> where one might be useful. We're looking at a maximum displacement of
>> about 50mm and a force of 22 Newtons (about 5 pounds). Using a normal
>> solenoid (non-magnetized slug), it appears we need about 4,700
>> ampere-turns to do this (100mm coil length, 30mm coil diameter). It
>> SEEMS
>> that it would be better to use a permanent magnet instead of a
>> non-magnetized slug. I'd expect the force to be proportional to the
>> product of the two fields. But, anyone here have experience with these
>> types of actuators? Any comments?
>>
>> THANKS!
>>
>> Harold
>>
>
> A little more info would be nice. Required actuation speed, duty cycle,
> system power limitations, actuation frequency, physical size limitations,
> etc.
>
> I don't have any experience using perm magnets vs. steel, but have you
> considered geartrain/leadscrew options? Also be aware of automotive
> starter
> solenoids, about 1.5 inches dia x 4 inches long, inch or so of stroke and
> about 10 lbs force.
>
> -Denny
>
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