DC curent on a 6 phase system

Discussion in 'Automotive Electronics' started by Petros.Alexakis, Jun 8, 2016.

  1. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
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    Hi all

    A quick question. If the phase current on a 6 phase system is 380A rms what is the the DC current?
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    RMS is a way of stating AC currents in equivalence with a DC current

    An AC RMS current of any amperage has the same POWER as the same DC voltage at that current.
     
  3. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
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    Maybe I stated the question in a wrong way. I have a 6 phase inverter with a phase current of 380A rms of 537A peak if you prefer. I am wondering how to calculate the current on the DC side of the inverter
     
  4. tcmtech

    Well-Known Member

    Nov 4, 2013
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    And how does this relate to automotive? o_O
     
  5. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
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    Answering the question will help the calculation?
     
  6. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    Sounds like homework to me.
     
  7. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    Knowing the percent efficiency of the inverter will tell you the output power if input power is known.
    Ex: 90% efficiency with 1000 watts input power gives 900 watts output power.
     
  8. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    What is the voltage and the current of the output? What is the input voltage?

    Why not post the whole question as you received it?
     
  9. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
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    Is attitude part of the forum or the answer? No mate it's not homework. The DC voltage is 48 volts and the AC voltage is 38 Volts
     
  10. tcmtech

    Well-Known Member

    Nov 4, 2013
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    Only when the question comes across as vague and questionable plus possibly not in the most appropriate section of the forum. :oops:
     
    shortbus likes this.
  11. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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    So, I understand you have six phases, each at 38v and 380 amperes.

    You want to know the input DC current from a 48 volt source.

    Correct?
     
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