Recent content by Axe199

so according to this standard they are checking and including in the THD up to the 40th harmonic i am asking in general , either it's the mains voltage or inverter ouput or line current to some motor

i am learning about harmonic analyzers and i have a couple of questions concerning them that need some sort of practical experience to answer them ( and i have none :) ) : 1-can harmonic analyzer analyze up to any harmonic? or is there a maximum ? if there is no maximum what's the highest...

are those active power filters?

i was doing a research on active power filters and i read about Iref ( the cancelation waveform) extraction algorithm, and they are using complicated algorithms like FFT or DFT in frequency domain or the park transform and clark transform in time domain, i was wondering, why isn't there any...

hi, THANKS VERY MUCH for all the very useful replies. I talked to my professor about this and he made two good points: " the fact that you have an engineering degree doesn't mean you can't make mistakes, a complex design will often have design mistakes and some time these mistakes won't be...

hi, i don't know if this qualifies as a question or not, but this is something i can't really understand. i am an engineering undergrad, when we are learning about the pros and cons of different method of doing anything , for example maximum power point tracking in PV systems, we discussed a...

i was desigining a simple ( simple as in no MPPT) PV-pump standalone system, and we decided on using an AC-pump, so while i was searching for inverters i noticed the remarkable difference in price ranges, so i started to read about the difference between the two, so far the disadvantages of the...

i am having a hard time understanding why do we place the brushes on the Magnetic neutral axis, the textbook simply says, because this is where the current reversal takes place, is the point where emf from different meet is the same as the point of current reversal?

ok thanks

maybe, but if this was the case he would've mention it, and why ignore the sides but not the tip? the sides are also considered in the proof but ignored in every single question specially when using efficiency

i think i got the one dimensional thing, but i don't get it why the sides are ignored, i mean every single textbook is doing the same thing , and when i asked my professor he simply said " because it's one dimensional " and then he called me stupid :D but anyway, aren't the sides exposed area...

So, i was studying some fin design in a heat transfer course , and then came the part where the efficiency is to be calculated, then i noticed that when he calculated the surface area and the sides of a rectangular fin weren't included, so i searched and i found out that it was neglected...

So i am making a simple demonstration of ideal gas law using a cylinder piston system, heating the system so the piston is pushed up, i wanted to calculate the heat transferred into the system, will it be Cp(Tf-Ti) or Cp(Tf-Ti)+ work done by the system ?

I was solving some examples and one of the examples states that pressure is a qualitative property, i searched a lot on the internet but i didn't find any explanation , i didn't even find any proof that this is true.

well, as far as i know, now material scientist and engineers are 2 distinct things.