I measured the contactor both in and out. When in the HVJB it measured 1.5 ohm. When I energised on the bench on its own, 0.3 ohm. Similar on another multimeter. Hard to explain the difference between measurements inside and outside the HVJB. One possibility is that you had something else connected...

Just checked all three. Neg and precharge energised sit at 0 ohms. Positive... 1.5 ohms :? Not energised, Postive also exhibits variable value changes. Smoking gun? If the positive contactor has welded closed then you will get very odd behaviour. Can you confirm you are measuring these without anyt...

ZooKeeper wrote: ↑Sun Aug 23, 2020 11:09 pm Not claiming to have the FOC tuning right, but DAMN that sound nice!!!

Fabulous

Contactors? It's not unusual for failed contactors to 'click' but have contacts that are burnt out or welded closed. Have you checked the contactors measure ~0 ohms when they are energised and ∞ when de-energised? What relay are you using for precharge? Are the contacts DC rated? Has it welded clos...

Alibro wrote: ↑Sun Aug 23, 2020 8:14 pm Err, could you please explain how?

Sure... when editing a post select the "Attachments" tab at the bottom of the edit window, then "Add files", browse to file location then "open file", and finally "Place inline".

Kelju wrote: ↑Sun Aug 23, 2020 6:07 am Here you can see the label on the Part and how the connector looks.

291A0-5SA1A is from the 2018-19 Leaf (see here)

Alibro wrote: ↑Sun Aug 23, 2020 10:07 am Got the motor and inverter seperated and out.

Very cool

Can you post your photos direct to the forum not via a third part site? We're trying to avoid information loss in the future if/when the third party host shuts down.

Kelju wrote: ↑Sat Aug 22, 2020 7:14 pm Any help is much appreciated. Thanks in advance!

Photo's of the inverter and any labels would help identify the parts.

As I've seen on photos here, there is a shottky diode on the power supply lane, with grey line facing other way. Is it placed correctly on my board? Note that both D1 and D2 in this photo have the grey line positioned away from the '+' symbol on the PCB. I've no idea if this is correct but they are...

If you get a chance can you weigh the car before and after conversion?

This is where i come to the point of maybe being able to help, if not then no harm asking. We had planned to use LEXI for a conversion course but that has now been cancelled. We do have another project bubbling away that could start in a few weeks and it may be possible to collaborate on that 8-) D...

Jack Bauer wrote: ↑Wed Aug 19, 2020 2:07 pm Contactor control for both drive and charging is intrinsic in all the vcus both hardware and software.

Great! So all we need now is the documentation

Cookie6000 wrote: ↑Tue Aug 18, 2020 9:14 pm Issue resolved.

That's good news

Going forward we need to think about contactor control during charging when we don't want the key on

Tesla Model 3 Long Range Battery in Lithuania for 9000 GBP ONO

https://www.ebay.co.uk/itm/124303005746

If interested make sure they ship as dangerous goods to minimise risk of confiscation.

Peter wrote: ↑Mon Aug 17, 2020 9:46 am My dilemma though is which Tesla SDU to buy.... X, S, PxxD ???

So, I think the answer to your question is buy an SDU from a 2018 car because it's unlikely to have the motor bearing issue, should include any facelift upgrades, and will be pre Raven SDU incompatibility

I'll try to find out if this really happened when I get a moment. elektrek said in April 2019 regarding the 'Raven' upgrades - "As anticipated, Tesla is bringing its new permanent magnet synchronous reluctance motor, first developed for Model 3, to Model S and Model X" (see here ). I've n...

P.S.Mangelsdorf wrote: ↑Tue Aug 18, 2020 6:59 pm
I can't find an answer as to WHAT changed and WHEN after 2017, just that stuff began changing.

That was the Model S/X 'facelift' (minor changes) and we're looking for something in 2019/20 after the Model 3 launch... I'll try to find out if this really happened when I get a moment.

Thanks again. No problem. One other thing to consider is the possibility that the latest 'high efficiency' Model S/X may use the Model 3 motor (or the same technology) and be incompatible with the SDU logic board. I'm out of touch with the current Tesla cars and don't know if this was just an inter...

My dilemma though is which Tesla SDU to buy.... X, S, PxxD ??? Try and buy one from a late car (some early cars had problems with the motor bearings) and from a vendor with a return warranty (some water damaged DU's around). It's also worth considering whether the front or rear is a better fit in y...

Cookie6000 wrote: ↑Mon Aug 17, 2020 7:04 am Will be working on the car this afternoon so, will run a load of tests on the VCU.

It would be interesting to see what the inverter thinks the bus voltage is... maybe your drive has lowered the voltage below the precharge threshold

The plan is to possibly run the motor and transmission reverse of how it was intended to have the correct clearance and not have to modify the control arms or sub-frame. Am i crazy or would this work? We know from Damien's E46 Touring that the Leaf motor will run in both directions at high speed :D...

I've had a quick look at the V1.5 software on Damien's github and believe the precharge contactor will stay on when the positive contactor is on so my comments regarding the VCU implementation are incorrect. I still believe the negative contactor should use the switched 12V not the OP1 VCU driver. t...

the exception of the negative contactor. the - side is sharing the OP1 VCU driver pin. Ok, I think thats the problem... when precharge has finished you're turning off the negative contactor and cutting power to the inverter... at least that's how I would expect the software is intended to work***; ...

Coders 4 Climate - "Damien is an electrical engineer also known as the BMW EV conversion person. He has been converting cars to electric for over 10 years."

https://coders4climatestrike.com/2020/0 ... rview.html

Alibro wrote: ↑Sat Aug 15, 2020 4:19 pm I've organised to have it collected tomorrow as it's 150 miles away from me. The lorry driver will pay him after a quick inspection.
Hoping to have it on my driveway for under £1500

Very cool