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Thread: 3-phase to 1-phase converter for Roadster HPC

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    Model S R231 EU widodh's Avatar
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    3-phase to 1-phase converter for Roadster HPC

    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!

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    Head Moderator / Administrator doug's Avatar
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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?



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

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    Senior Member dpeilow's Avatar
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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!

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    Model S R231 EU widodh's Avatar
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    Quote Originally Posted by doug View Post
    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?

    There were rumors that the Swiss Tesla store had to install a 3-to-single phase converter at high expense.
    This picture was taken in Belgium at the office of NSolar. The license plate is also Belgian.

    Quote Originally Posted by dpeilow View Post
    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!
    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.

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    Senior Member dpeilow's Avatar
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    No way should the losses be that much.

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    Head Moderator / Administrator doug's Avatar
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    Quote Originally Posted by widodh View Post
    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.
    Quote Originally Posted by dpeilow View Post
    No way should the losses be that much.
    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.

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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.

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    Senior Member dpeilow's Avatar
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    Head Moderator / Administrator doug's Avatar
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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.

    Quote Originally Posted by Fuzzylogic View Post
    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.
    Because in many places, pulling more than 16A single phase is verboten for the very reason you mention.

    Quote Originally Posted by Lloyd View Post
    I don't believe the HPC as manufactured has a current limit at 63 amps. If requested it would try to draw 70 and trip the 63.
    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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