Three Phase Recharging

[vfx]

there is no 5 pahse system,...

http://papers.sae.org/2002-01-1877/

n this paper, a new five-phase brushless permanent magnet motor is proposed.

 

[Alfred]

I wonder how compact and affordable a static (as opposed to rotary) 3 phase to 1 phase converter would be. Such a box would plug into three phase supply and provide 220V/50A single phase... I know the opposite is routinely done to run 3phase motors on single phase outlets...

Such transformers are available. Cost is around 3000 CHFR (=USD) here and they weigh 140Kg. If you want to install a Tesla Home connector, that is what your local supplier will likely ask for.

 

[Eberhard]

tesla development of the roadster is based on tzero from ac propulsion: AC Propulsion assembled the tzero LiIon battery from 6,800 standard cells. The cells, designated 18650 based on dimensions of 18mm diameter and 65 mm length, are slightly larger than the familiar AA cell. Within the industry, 18650 capacity is in the 1.8 – 2.0 Ahr range with a peak discharge of 6A to 8A. The 18650 cells weigh 43 g. Specifications have been improving about every six months.
and also the idea of using the PEM and windings of the ac-motor as charger comes from ac propulsion too: AC Propulsion's Reductive™ Charger. The Reductive charger allows the easiest EV access to existing electric power infrastructure, and does so in a way that maximizes convenience for the EV user. With a Reductive charger, the EV user can plug into any existing outlet from a 110V/15A household socket to an existing EV conductive wall box, or even a 240V/80A commercial welding plug.

 

[edo]

It is likely that the first stage of the built-in charger is a rectifier. (if there is anyone out there that could confirm this it would be useful)

If anyone is willing to try it, they could use an external rectifier on the three phase and pump the DC into the normal charging outlet.

since half the internal rectifiers will see twice their usual current (and the other half will see no current) the current should be limited to half what is usually allowed (70A/2=35A)