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mikeleslie 15-01-2013 02:22

R32 and the use of Electrical solenoid actuators
 
R32
....Electrical solenoid actuators, no greater than 1 in. stroke and rated electrical input power no greater than 10 watts (W) continuous duty at 12 volts (VDC)...

Didn't have a need last year, and can't seem to find any posts discussing it, so does this mean I can stop retrofitting FP motors into (older, like from the 1990's GM trucks) standard GM door lock actuators?, or other power door lock actuators for that matter

They seem to fit the criteria, less than an inch stroke, 10w (probably)? I'm sure a Delphi would have real details. Or am I just wishing here.

Tristan Lall 15-01-2013 02:50

Re: R32 and the use of Electrical solenoid actuators
 
Quote:

Originally Posted by mikeleslie (Post 1215612)
Didn't have a need last year, and can't seem to find any posts discussing it, so does this mean I can stop retrofitting FP motors into (older, like from the 1990's GM trucks) standard GM door lock actuators?, or other power door lock actuators for that matter

They seem to fit the criteria, less than an inch stroke, 10w (probably)? I'm sure a Delphi would have real details. Or am I just wishing here.

Don't use the Fisher-Price motors in any application, since they're not legal in 2013. (There are several can motors from BaneBots and AndyMark that are legal, which superficially resemble the Fisher-Price motors.)

As for electric door lock actuators with motors in them, they don't fall under the solenoid rule, so their stroke and power rating are immaterial. (It's a solenoid actuator rule, not an electric linear actuator rule.)

rsisk 15-01-2013 08:38

Re: R32 and the use of Electrical solenoid actuators
 
Quote:

Originally Posted by Tristan Lall (Post 1215622)
...a solenoid actuator rule, not an electric linear actuator rule...


What is the difference between these two things?

mikeleslie 15-01-2013 17:07

Re: R32 and the use of Electrical solenoid actuators
 
So basically if it has a field coil and doesn't rotate then it qualifies. Like a striker on a doorbell or a small starter solenoid? or am i missing something.

PAR_WIG1350 15-01-2013 19:56

Re: R32 and the use of Electrical solenoid actuators
 
Everybody, this is a solenoid.

A solenoid actuator uses one of these to move something (the "armature") through its center. Typically the armature is either magnetic or ferrous (so that it will react to the field created by the coil.

Here is a good cross-sectional image of one (in this case it is used as a valve actuator, not unlike the pneumatic solenoids we use).

Most of the solenoids here are similar to the ones the rule is referring to.

I hope this helps someone.:)

Al Skierkiewicz 15-01-2013 20:47

Re: R32 and the use of Electrical solenoid actuators
 
Solenoids that fit the rule can be found at McMaster Carr.

Tristan Lall 15-01-2013 20:48

Re: R32 and the use of Electrical solenoid actuators
 
Quote:

Originally Posted by rsisk (Post 1215669)
What is the difference between these two things?

The door lock actuators described above are an electric motor hooked to a lead screw and/or reduction gears (like this). The solenoid actuators (like the ones Alan linked) don't have motors inside.

Quote:

Originally Posted by mikeleslie (Post 1215970)
So basically if it has a field coil and doesn't rotate then it qualifies. Like a striker on a doorbell or a small starter solenoid? or am i missing something.

We've argued about this definition in the past. My impression is that a solenoid actuator necessarily implies a proper solenoid (i.e. an energized coil that produces a substantially uniform magnetic field in the space along the length of its internal axis, with a plunger that moves along that axis, through that space, as a result of the electrical current supplied to the coil); others have suggested that a less restrictive definition satisfies the rule. In my opinion, a conventional electric bell is not a solenoid actuator.


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