tom91 wrote: ↑Sat Aug 17, 2024 11:47 am What are you doing for the BMS?

Option 1: Get the MG system happy
Option 2: Aftermarket

I've made some progress.

There's no MG subsection so I'll ask here.

I'm using a Tesla SDU w/OI in a Honda S2000 (hmm, no mention of MG yet?).

BUT, I'm using the battery and other electronics out of an MG ZS EV (Ahh, there it is!).

The OpenInverter board simple uses a three position switch for shift select. I have it ...

Gotta love answering your own questions. Yes, the resistance on channel 2 is higher hence the voltage range lower.

tom91 wrote: ↑Sun Jul 28, 2024 11:19 am You need to make sure your udcmax is set correctly.

It's currently set to 0 for testing purposes. I need to look through the Parameters glossary to understand what all these settings are for.

Came over from a link on my post about first spin up of a Tesla SDU.

You mention Dual Throttle channels. The pedal I am using is the Bosch one from the MG ZS EV. It is dual channel. Anyone know if the second channel is 0.4 to 2.1V? I will of course check but wondering if anyone knows?

I'm converting a Honda S2000 to EV.

image.jpeg

Http://youtube.com/@evs2k

I started this project by buying a Tesla SDU and fitting it to the S2000 subframe.

I then went on a search for batteries and electronics to fill the rest of the gaps. I needed a modular battery so I could custom package ...

What are the parameters that allow an SDU to survive higher voltage?

I read through the first seven pages and skimmed through the last few.

Did this ever get productised? Couldn’t see it in the shop.

Hmm, my MG ZS EV pack has a max voltage of 453v (108s). Best be careful.

manny wrote: ↑Fri Jul 26, 2024 6:57 pm Your throttle pedal is maxing out the input. This is dangerous!

Ahh, thank you. I will get sorted.

tom91 wrote: ↑Thu Jul 25, 2024 9:17 am bad at searching

Found them!

https://openinverter.org/wiki/Parameters

Just realised I haven't posted the video.

I would still appreciate someone having a look through my JSON and making any suggestions. I have a very limited understanding of what any of those fields are at present. Sure there's a look up some where.

One out of spec thing I am doing is running this motor with a reconfigured MG ZS EV battery ...

Please state what you change so other who just as bad at searching the forum find your fix.


I followed your instructions above (thanks):

udcsw 0
udcmin 0

Then I calibrated the pedal with a dead spot at the bottom and top of the range.

If you watch the video you'll notice that even though I ...

Yay, got it spinning!

Here's the parameters:

That said, they are all default values, except 'dirmode' which is 'SwitchReversed'.

I will get onto it tomorrow.

I have the modified (running backwards, ghetto LSD) Tesla SDU with OpenInverter installed in a subframe and all wired up.

I am using the following wiring diagram with the contractor box from the MG ZS EV. I added an extra line to close the Main Negative contactor on Ignition.

When I flick the ...

Ahh, ok. I assume that is the contactor coil shown in the diagram on the Main and Pre-charge lines. So the OpenInverter board pulls them low when it switches them on.

Makes perfect sense now thanks.

I have a Tesla SDU with OpenInverter board and a repackaged MG ZS EV battery.

The MG battery comes with a 'penthouse' with contractors and pre-charge relay.

The wiring to the OpenInverter comms connector shows lines for 'main contractor [sic] relay' (P3) and 'pre-charge relay' (P11) Screenshot ...

Boxster EV wrote: ↑Tue Apr 30, 2024 12:10 pm Outputs from LDU used on my Porsche here:

viewtopic.php?p=49997#p49997

I didn’t see anything about the RPM Signal

Unfortunately the sdu board doesn't export the pwm signal so you will need something external to drive the cluster


I've got the output side of the project working:
https://youtu.be/jkfO0K9v1hA

About to start work on the input (Canbus) side.

But anyone know what this is?
Screenshot 2024-04-30 ...

arber333 wrote: ↑Fri Mar 01, 2024 2:48 pm I may have some boards left for populate by hand if you want to build yourself. Or i can... PM me.

Cheers. I'll see where I get to with Arduino and get back to you.