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  1. J

    inverter output

    Ok thank you I'm reading them;):)
  2. J

    inverter output

    It's me that I can't see why it is a line to line. Doesn't matter, my problem
  3. J

    inverter output

    yes of course. I was saying in another post that looking at univ. handouts I frequently saw the alternate square output voltage doing -Vdc to Vdc (rectangular not sine but anyway alternating). If this i strue I have an alternate ranging from -550 to 550. What is it now this? A line voltage or a...
  4. J

    inverter output

    Ok but it seems to me that now 400VAC rms is now each line and not line to line and this because, in reality, what is it totally unclear to me is the voltage reference for the output. This happens also because when I watch at tutarials or university handouts published on the net it seems to me...
  5. J

    inverter output

    Given a 3phase inverter let's say 400vac rms line to line (means 230VAC rms each line referred to neutral of generator). After the 6 diodes converter stage there is a about 550VDC (approx -275VDC to +275VDC) after the condenser which straighten the humps. This is because the non-rms phases range...
  6. J

    Power factor correction

    Not only she, Jim Morrison, Jimi Hendrix and all the other of that kind
  7. J

    Power factor correction

    Ok in fact I was searching for a very intuitive explanation before formulas as you remember. Sometimes I have seen very nice gif around that in my opinion are very helpful. One I remember I lked very much is that of the thermic engine with valves, pistons, ... moving like in the reality...
  8. J

    Power factor correction

    Ok you correct the phase and then mathematically V*I is at its topmost. This is the method and it works. I know (ar at least I am convinced of this) what is the phase shift and from the physics why this happens with devices like capacitors and inductors. That is not my problem. My problem is...
  9. J

    Power factor correction

    You got the point. I used a not appropriate language but it is not the word (or the way people commonly understand complex concepts as you say) . So now I don't speak of electrons, I speak of how energy flows. MWO helped me but I still have some doubts. I try to explain. I start from an...
  10. J

    Power factor correction

    yes ok, (I am supposed to have understood what is it the power factor) but real question is why if i add a further load (of the reactive type) and apparently adding a further burden to the source I obtain that, instead, some relief is given the source? As you say I read in the past the example...
  11. J

    Power factor correction

    Hi To correct power factor and consequently reduce the amunt of current the source has to provide for the active power (true work we want) and the reactive power. The way is to add impedances to the circuit to the load impedances. The added ones are again of the reactive type. Formulas...
  12. J

    3 phases inverter output current

    My question is more like this : when it is said that current output is of example 99 amp this means that, in case of 3 phase output, in each line current is 99 amp or 33 amp (99/3)?
  13. J

    3 phases inverter output current

    This is in general, when speaking of the output current of a 3 phases inverter we are speaking of one line current or of the sum of three lines currents? Or other? Example we have a three phase load (motor) in star connection. Let's say no neutral connected. The switching stage produces three...
  14. J

    BLDC motor Ld and Lq

    The gave me Ld and Lq different one from the other and they said it is a non salient
  15. J

    BLDC motor Ld and Lq

    No, they gave me both so i dont know how to use them
  16. J

    BLDC motor Ld and Lq

    Hi I have now to deal with the control of a BLDC. This subject is totally new for me. I received from the motor manufacturer the data sheet with a Ld and a Lq inductance in mH. So in order to have the inductive reactance of the stator windings how do I put together Ld and Lq inductance to get...
  17. J

    Indexing

    Hi I'm using Studio 5000 from Rockwell. There is the possibility to do for loops and I normally do it using arrays. Now I need to make a loop doing something with array elements but I need also to use an index that again is an array. Example main_array[index[0]] but syntax is not accepted and...
  18. J

    Inverters and Vector Control

    Hope the subject is right for this category. What does it mean "vectorial control" speaking of inverters and control of electric motors. I mean how does this control can work together with frequency/speed control based on a system of switches which govern amplitude and frequency of the...
  19. J

    Paralleling Generators

    Very well. Thank you very much. Best regards, Roberto
  20. J

    Paralleling Generators

    Then, can we say that when two generator are paralleled and load is purely resistive, if excitation field increases in one of the two it could be considered like if the other was decreasing its excitation (this because the reference is the output voltage)?. And so is it becoming a reactive...
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