chris1howell
Well-known member
Ford Focus EV just added to the OpenEVSE compatibility list... Thanks for the report David.
List now includes:
Leaf
Volt
i-MiEV
Plug in Prius
Focus EV
List now includes:
Leaf
Volt
i-MiEV
Plug in Prius
Focus EV
What about Tesla Model S?chris1howell said:Ford Focus EV just added to the OpenEVSE compatibility list... Thanks for the report David.
List now includes:
Leaf
Volt
i-MiEV
Plug in Prius
Focus EV
I'm sure Chris will test his ASAP.waidy said:What about Tesla Model S?
mitch672 said:Model S comes with a J-1772 adapter to the Tesla HPC connector, I'm sure it's no problem.
What would be interesting is if someone with a Signature Edition Model S with the dual 10KW onboard chargers could test on a 75A OpenEVSE, and see if that works. Teslas proprietary HPC EVSE can use up to a 100A breaker (to supply 90A) to those 2 onboard chargers...
chris1howell said:mitch672 said:Model S comes with a J-1772 adapter to the Tesla HPC connector, I'm sure it's no problem.
What would be interesting is if someone with a Signature Edition Model S with the dual 10KW onboard chargers could test on a 75A OpenEVSE, and see if that works. Teslas proprietary HPC EVSE can use up to a 100A breaker (to supply 90A) to those 2 onboard chargers...
Mine is reservation P1089 so it is still a few months away... I already have the 75A ITT J1772 cable and a Monster 75A Square D contactor.
PDF and Eagle schematic corrected. It is a 12vdc input to isolated +/- 12vdc DC-DC converter.KevinSharpe said:Hi Chris. Not sure how to comment on the Open EVSE project page but wanted to make you aware that the DC-DC on the Rev 2 schematic is listed as +5V input but the V2 BOM says +12Vchris1howell said:Cool. I just sent out the new board design today.
KevinSharpe said:You can shift into neutral with the J1772 connector attached?
Fantastic! Any progress with the Tesla 'issues' that have been reported?chris1howell said:Ford Focus EV just added to the OpenEVSE compatibility list... Thanks for the report David.
List now includes:
Leaf
Volt
i-MiEV
Plug in Prius
Focus EV
Great! Sorry, but I did spot one other item that I forgot to mention... text says "5V Relay" but they are clearly powered by the 12V rail... I know this is all trivial stuff but hopefully useful to someoneBarbouri said:PDF and Eagle schematic corrected. It is a 12vdc input to isolated +/- 12vdc DC-DC converter.
eaf said:Hi,
I have a few question regarding GFCI schematics... I apologize if they sound dumb, but please explain this to me... I'll use v2 for notations, but the schematics is the same in v6 except that the opamp isn't labeled.
It seems that it's an inverting amplifier/level holder followed up by a comparator, both provided on a single LM358 opamp running from a single supply. When CT senses current, it generates a voltage spike of 330*I/1000 on R17, which is limited by zeners and subsequently amplified with gain 100=R16/R20. In order to trigger comparator C9=10uF will have to gain at least one volt, and given max output current of LM358 30mA, this will take at least 0.3ms. The reaction time is good. But the current seems a little high. 1V on C9 requires 0.01V on R17, i.e. 30uA through R17, which, assuming 1:1000 CT (the one that's used in the examples) means 30mA GFCI trigger current. Do you think that's a little too high? Class A GFCI should trip at 5mA...
Second question is about the amplifier. LM358 here is powered by a single power supply (as opposed to split). And in equilibrium both + and - are held at the GND level. When CT triggers, - seems to be driven below GND whereas the absolute minimum voltage for either - or + from LM358 specs is -0.3V. Should +/- not be held at VCC/2 level for single power supply use? Do I understand it correctly that - will indeed be driven below GND when CT is triggered?
Third question is regarding GFCI circuit output. It is fed into ATMEL where it triggers an interrupt, and then the software turns off relay and does some pilot signaling. Would it be more reliable not to depend on software to turn off power to the car in case of GFCI faults? E.g. perhaps have a flip-flop after GFCI circuit, which output be subsequently ANDed with PD6? This way no matter what state ATMEL is in and what software is doing, the AND would immediately turn the relay off?
I like this project a lot, just want to understand it better.
Thanks!
eaf said:Do I miss smth here?
:twisted:chris1howell said:I started a Google Code Open Source project for the "Open EVSE" based on the DIY EVSE http://www.mynissanleaf.com/viewtopic.php?f=26&t=2736
I just started populating the site with info and a basic schematic. There is much more to come...
Take a look and contribute if you can.
http://code.google.com/p/open-evse/
TEEEKOWED said:color=#FF0000] :twisted: [/color]
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