http://www.magnet.fsu.edu/education/tutorials/java/magneticshunt/index.html

I just learned about magnetic shunts, thanks to Wookie. Referring to the above website, I can see that you could probably get a zero and a max on the left side of the drawing but the right side would only make a parallel path. More convieient for fine tuning, but lacking a zero% or a 100%.

I'm wondering if anyone here has actually used magnetic shunts and could share their experience about practical applications.

Thank you,
#12

 

Haven't used one in a circuit. But have one, its in a "stick" welder. Instead of moving the output lead from one tap to another, like most "buzz boxes", my welder has a crank on it. The crank moves a lamination in and out of the core of the transformer. This in turn changes the output amps of the welder.

 

LVDTs or Linear Variable Differential Transformers use this principle. They are used in making very accurate linear measurements when attached to the proper circuitry.

http://en.wikipedia.org/wiki/Linear_variable_differential_transformer

Also, if you haven't seen it, here is a YouTube link..... http://www.youtube.com/watch?v=DBX1-POuJMw

 

LVDTs or Linear Variable Differential Transformers use this principle. They are used in making very accurate linear measurements when attached to the proper circuitry.

http://en.wikipedia.org/wiki/Linear_variable_differential_transformer

Also, if you haven't seen it, here is a YouTube link..... http://www.youtube.com/watch?v=DBX1-POuJMw

We used LVDTs on some Laser cutting machines where I used to work.
The metal was on a large roll, which was fed into the machine. The metal usually had some camber and the LVDT had a cam follower that would ride the edge of the metal. That in turn would offset the program parameters enough to keep the parts within specs. The laser was a Coherent General and the CNC controls were from Anorad, it was several years ago and don't know if either are still in business.

 

Brilliant!