Recent content by Jet Boer

Thanks Jim, I will definitely try a similar experiment to try different core configurations and materials. So far I have gathered to following from this thread and other research I have been doing. I am basing this summary on a DC magnetic field. Magnetic circuit size If I want to make the...

In that article I mentioned (link: http://doras.dcu.ie/15062/1/Design_of_magneto-rheological__MR__valve-24-04-2008.pdf) look at page 4. That is the layout and geometry I am using for my experiment. I am also working with fluid pressures 5 times higher than that (approx 10 MPa). It needs to be...

Ok, I sort of understand now what you are saying about particle size. Here is the dilemma though, I am only trying to build a prototype system and unfortunately I have some nasty geometry involved so using powdered iron that is baked in a ceramic matrix is not possible for me. I need a solid...

I do agree with that, but because I am working with fluids and need a leak free device I will first try to look at other possibilities. There will definitely some unavoidable latency due to a bandwidth limit. Ok, I sort of get what you are saying, but Magneto-Rheological (MR) fluid is not a...

Ok, the way I understand it is that the skin effect is most significant with an alternating current source. I am however using direct current (DC), so if my understanding of the concept is correct, then the skin effect does not really apply in my situation. I am merely applying a step voltage...

Hopefully more people will pick on this thread. Thanks anyway. :)

I had the same idea, I am just not sure what is valid. For example, I can calculate the reluctance of the circuit (which has units 1/Henry), but is the total inductance of the circuit just as simple as inverting the total reluctance of the circuit? My strong point is mechanical systems, this is...

This one is for people working with electromagnets (more specific, DC) etc. I have a few questions that I am struggling with: I am quite comfortable with the concept of the response time (time constant) of a coil in free space, μ0 =4π x 10-7 . The thing I am struggling with is the response time...

Thanks.

Thanks for explaining the graph, I have this graph of my regulator [URL="[PLAIN]http://www.igs.org.za/high-pressure-regulators.html"][/PLAIN] [URL="[PLAIN]http://www.igs.org.za/images/high-pressure/304_Graph.jpgl"],[/PLAIN] but couldn't understand it properly. It is the first regulator range...

Q Goest & Averagesupernova, thanks for the reply, but I got to an answer as well. Q Goest: Yes the "droop" is something that I will keep in mind, but if the effects are minimal, that won't be my major concern.(Tell me if you think I am wrong) I think the problem is that I approached the...

No, the regulator is well within its specified input and output range. We also thought that regulator was faulty, and tried another regulator, but the pressure drop still occurred.

I have recently been experimenting with pressure to generate a mass flow and discovered something really bewildering. First let me explain the procedure. I use large stainless steel tanks filled to about 3/4 with water so there is a large enough capacity. I then pressurize the system with...