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3-phase to 1-phase converter for Roadster HPC

Discussion in 'Europe' started by widodh, Apr 24, 2012.

  1. widodh

    widodh Model S R231 EU

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    I got this e-mail last week from a Belgian company ( Naeyaert Solar bvba ) that has developed a 3-phase to 1-phase converter.

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    With this you should be able to install a HPC with 90A's in Europe for a Roadster.

    The Model S will do 3-phase natively which is much better in terms of efficiency, but if this could work for the Roadsters out there, that's great!
     
  2. doug

    doug Administrator / Head Moderator

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    That's interesting. There are posts around here somewhere, from back before European Roadster deliveries started, about needing such a device since they'd be stuck with just 16A single phase. Any mention of cost? Is it using a matrix converter or something similar?

    I think the only EV that would have a use for this is the Roadster. The other plug-ins that are limited by single phase can't do much better than 16A. So the market is fairly limited.

    Where was this picture taken?

    attachment.php?attachmentid=5657&d=1335280316.jpg

    There were rumors that the Swiss Tesla store had to install a 3-to-single phase converter at high expense.
     
  3. dpeilow

    dpeilow Moderator

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    There was a British manufacturer making such a product that I contacted over a year ago when we first got involved with the Moat House, however they'd just discontinued it through lack of interest!
     
  4. widodh

    widodh Model S R231 EU

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    This picture was taken in Belgium at the office of NSolar. The license plate is also Belgian.

    I don't know how much such a converter will be and what the losses are, since they seem significant to me.

    I need 3x63A to get 1x90A.. 90A at 230V is 20.7kW, while 3x63A is 43kW.
     
  5. dpeilow

    dpeilow Moderator

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    No way should the losses be that much.
     
  6. doug

    doug Administrator / Head Moderator

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    I noticed that and figured they were just listing a standard outlet supply rating. That little box would be quite the heater if it were sinking 22 kW.
     
  7. Fuzzylogic

    Fuzzylogic EU Sport 359 & S94

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    The input for the HPC will be 90A, but the car will charge max at 70A, so why not skip the whole converter and charge at 63A instead?

    I know that it will generate a load on one phase only, and that's not very nice to the grid, but other then that, i don't see why it should not work.
     
  8. dpeilow

    dpeilow Moderator

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  9. doug

    doug Administrator / Head Moderator

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    Guys. I realize we're not all engineers here, but we've been over this so many times, it's not even funny.

    Because in many places, pulling more than 16A single phase is verboten for the very reason you mention.

    The PWM signal from the HPC sets the current limit. If only 63A is available, then who ever set up the HPC would set it to provide a control signal that advertises 63A or less.
     

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