Recent content by xhatemx

Try COMSOL Multiphysics

I've been looking for a simulation program for the same purpose for quite some time .. Thanks for the links, hope anyone works

I totally agree but they have their reasons. The system here runs in a very different way than yours. Moreover, as a developing country we don't really have those faculty with nuclear experience. The only other possible solution was hiring foreign faculty which is not acceptable also. It's...

Thank you MATLABdude. Very helpful. I didn't want to bother you with the reason why I'm obliged to pursue a Nuclear Engineering route, but here it is: My University has a plan to initiate a Nuclear Engineering department in 4 years. They have selected fresh graduates from Electric & Mechanical...

I'm sorry if posting this breaks any of the forum rules but I need to take a decision soon.

I'm a fresh graduate with a BSc degree in Electric Power & Machines. However, my MSc thesis should be nuclear related due to some issues with my university. What do you think a proper field of research in Nuclear Engineering where I could use my BSc electric power background ? It worth...

Thanks i'll try that ... Its frustrating never thought a PI controller would be that complex

skeptic2 thanks again for your help .. its very useful so far sorry for the late reply; i stopped working on the project for a while and paid attention to the exams. Anyway, Whats the purpose of the diode ? .. Is it for limiting the current ?

@ TheAnalogKid83 The current signal is actually a voltage drop across a very small resistance (voltage signal corresponding to the passing current). Also as i mentioned before i know nothing about this motor except its rated V, I and rpm. No manuals or datasheet. Actually this motor has been in...

Thanks for your reply skeptic2 Just a fixed ramp speed varying from 0 to 10v corresponding to 0 to rated rpm (which is 1500 rpm). Actually I've implemented the speed control loop and it worked fine. Still the problem is with the red box in the pic and also i think i will have to re-adjust the...

C'mon guys any help is mostly appreciated

Good day everyone I'm implementing a speed controller for a DC motor 220 v 2.7 A 1500 rpm. I've already made and tested the firing circuit and the motor works fine in an open loop. Now big problem the parameters of the motor are unknown and impossible to find. No time for mechanical...

simply you construct the table and you will find for this example that after certain iteration the numbers in a certain column will be the same or of accuracy better than that required by the question. this is when you stop . .

this is better : http://science.howstuffworks.com/question603.htm

check this : http://en.wikipedia.org/wiki/Resonance_frequency and for simplicity , i think that it is the frequency for a certain circuit that makes X(L) = X(c) , ie resonance frequency = 1/(LC)^0.5 . not sure