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Power Harmonics due to Tesla Charging

Discussion in 'Roadster: Technical' started by jaanton, Jul 14, 2010.

  1. jaanton

    jaanton Roadster NA #1026

    Jun 25, 2010
    Oakland, CA
    Does anyone have any figures for production of harmonics in power lines due to charging electric vehicles and specifically the Tesla? I'm thinking that there is essentially a high current SMPS involved but when charging off a 240v supply the neutral conductor should have little to no current. But that's the trick. Similarly if you are charging off 120v @ 15A the neutral must be involved. Unlike a computer where only a small portion of the power capacity is being used, the EV will want to use nearly all the power capacity.
  2. mpt

    mpt Electrics are back

    Oct 15, 2008
    Warren, New Jersey, United States
    I can't say too much in answer to your question... over my head!

    What I do know is that there is no neutral connection on the 240v charger; only the two hot legs.
  3. Alfred

    Alfred Supporting Member

    May 28, 2009
    The type of load matters. The supply essentially sees high power rectifier circuitry and not a motor with much non-resistive load. To be sure you should probably make a measurement.
    P.S. In Europe the load is always from phase to neutral, usually L1 (around 230V).

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