6 phase comparison to a 3 phase machine

Discussion in 'Automotive Electronics' started by Petros.Alexakis, Mar 10, 2016.

  1. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
    8
    0
    Hi I am new to the forum. If we have a permanent magnet motor that is 1kw in power if the motor is 3 phase will require P=3*Vφ*Ιφ and when it is a 6 phase motor will it need P=6*Vφ*Ιφ? I know it is silly but I am strugling

    Thanks
     
  2. tcmtech

    Well-Known Member

    Nov 4, 2013
    2,032
    1,622
    I don't understand your question?

    What are you trying to do?
     
  3. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
    8
    0
    Design an inverter. And i want to decide the current rating of the devices I am going to use. If by increasing the phases I decrease the current it will be very helpfull
     
  4. tcmtech

    Well-Known Member

    Nov 4, 2013
    2,032
    1,622
    All you will be doing is dividing up the total load by more devices and using more wire to connect everything to the motor so how does that factor into your concept?
     
  5. Petros.Alexakis

    Thread Starter New Member

    Mar 10, 2016
    8
    0
    Device current is really important because I need a motor that rquires a lot of current. If I can reduce the ammount of current my devices see it is really important
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,500
    2,366
    How is the motor commutated? Does it have any commutation devices?
    Max.
     
  7. tranzz4md

    Member

    Apr 10, 2015
    139
    27
    An alternating current, polyphase, permanent magnet motor, eh? And you're firing it off a DC buss, and trying to make it a 6-phase motor and matching inverter, to minimize "device current".

    And it's an automotive application, (and want that to be evident) because you're keeping this in our automotive forum.

    At this point you're claiming or imagineing 380A rms @36v /phase and cant figure out how much 48V DC you'll be drawing off that buss.

    Well, I'm anxious to see these answers too. This PM ACmotor thing sure sounds unusual, but I dont get away from the old class B 3-phase workhorses very often anymore.
     
    Last edited: Jun 26, 2016
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,500
    2,366
    PM 3ph AC motors and/or BLDC are fairly common now, Fischer-Paykel for washing machines and ECM motors in HVAC systems, and of course servo's have been 3 ph AC and BLDC for some time now.
    All P.M.
    Not to forget the R.C. crowd also.
    Max.
     
Loading...