TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

International rectifier aquisition by infineon

Discussion in 'Off Topic' started by Toyolla2, Aug 22, 2014.

  1. Toyolla2

    Toyolla2 Member

    Joined:
    Jun 22, 2014
    Messages:
    20
    Location:
    Toronto
    INFINEON offers a 56% premium for IR shares. The IGBTs for the Roadster electronic inverter were supplied by IR. I do not know whether they supply for the Model S. Comments anyone ?
     
  2. Jackl1956

    Jackl1956 Member

    Joined:
    May 11, 2013
    Messages:
    992
    Location:
    Los Angeles
    Very interesting.

    Check out page 17 of this PDF.

    http://www.irf.com/investor/2013annualpresentation.pdf
     
  3. LuckyLuke

    LuckyLuke Model S P85DL

    Joined:
    Dec 14, 2011
    Messages:
    2,092
    Location:
    Eindhoven, The Netherlands
    Interesting indeed, page 14 shows the model S powertrain.
     
  4. adiggs

    adiggs Active Member

    Joined:
    Sep 25, 2012
    Messages:
    1,347
    Location:
    Portland, OR
    Anybody else see the graphic of the Model X skateboard on slide 9? I've been thinking that a performance Model X, with 2 motors and all 4 wheels pushing, might go under 4s 0-60; I semi-expect Model X to briefly wear the crown of fastest 0-60 time and maybe quarter mile, out of the Tesla family. (Then I expect AWD Model S to be available, and to take that crown away; ah well).
     
  5. Toyolla2

    Toyolla2 Member

    Joined:
    Jun 22, 2014
    Messages:
    20
    Location:
    Toronto
    Hi adiggs , I have to enquire what type of dystopian future you are dreaming up ? Just the thought of sub 4sec vehicles out there that can be purchased by anyone. I think that road rage would be generated within even the most balanced person if the driver in front displayed such poor driving skills that you are unable to unleash the potential of your machine without personal risk. That said, there are a lot of the wrong type of people driving around today and perhaps may I suggest that even the drivers of these performance machines should be required to undergo psychological testing. Back in the day, someone thought it a good idea to rent a Cessna to 18 yr old Mathias Rust who finished up landing in Red Square. I suspect there were later repercussions, with heads rolling, at that particular rental agency.

    Regarding dual axle drive. I am not going to rise to the bait on the setting of motor V/Hz and gear ratios. The issue is simply one of power. Maintaining constant acceleration with an induction motor means constant drawbar pull. It is entirely possible, but force times velocity equals power and eventually the battery will be required to supply a current exceeding the 3C rate. That is why - on the quarter mile - the roadster may start off like a 10sec car but by 80 mph acceleration begins declining with increasing speed. It is still impressive and I am sure the old trick of increasing the gear ratio would pay off here. If you are not making 130mph in the 1/4 mile why not sacrifice some top speed for a tad more acceleration ? In fact you could gear for a lower terminal speed than any of your competitors and still produce a better 1/4mile time. Here, the strategy for an electric vehicle is to arrange for the greatest number of motor revolutions over the quarter mile since each rotation represents the delivery of a fixed amount of energy. To a lot of people this is obvious but no one is doing it yet.
     

Share This Page