The Maker Faire in Hannover will take place on August 23rd and 24th: https://maker-faire.de/hannover/

I will be there presenting my converted Golf II. If any of you are around, definitely come by for a chat

What are those requirements do you know them?


The TÜV Merkblatt 764 (2021) notes: “Die für Fahrzeuge der Klassen M und N möglichst einzuhaltenden Mindestabstände des Energiespeichers betragen zur vorderen äußeren Begrenzung des Fahrzeugs 420 mm und zur hinteren äußeren Begrenzung des Fahrzeugs ...

But the internal oil pump is connected to the input shaft. Thus, locking it disables the pump. If you weld the PSD, then the input shaft, MG1 and MG2 rotate together.

Pete9008 wrote: ↑Sun Oct 16, 2022 9:31 am So the question, does anyone have data for the Lq and Ld inductance for other motors?

This paper (https://www.mdpi.com/2032-6653/13/3/51) specifies around 3mH for Ld and 5mH for Lq for the gen3 Prius motor.

FFMan wrote: ↑Sat Sep 03, 2022 3:53 pm but i didn't change the load address. would this cause the f/w to overwrite the bootloader ?

Yes, that is probably your problem. Just use the .hex files and you should see the LED blinking again

is it possible/likely the stm32 is damaged or locked somehow, and would replacing that IC (assuming i can get one) worth a try, or does the fact that it accepts a download not indicate this ?


I’m pretty sure your STM32 is ok. When you reprogrammed it with stlink, are you using .bin or .hex ...

Hi Leon, any chance you can post a compiled version of your mg2 software, I wouldn’t mind giving it a test on my rx400h mg2, I just don’t have the ability to compile, something I really should look at again but last time o looked at trying to compile stm32 in windows it was over my head!


I ...

bexander wrote: ↑Sun Aug 14, 2022 3:10 pm Are you sure?

I’m sorry, I got that mixed up with the 2-pole pair prius resolver – yes, the Kia motor uses a 4 pole pair resolver.

ok, been fiddling with this a few hours today, and now I get an angle from the resolver, but it seems to turn over from 365 to 0 several times in one axle revolution, and that doesnt seem right?


The angle refers to the electrical angle, not the mechanical angle of the axle. Thus, it is possible ...

Gratulation :)


Thanks


Very large milestone. Did Ulrich Siebold do the inspection? Where are you located?

He currently isn’t available, but one of his colleagues familiarized himself with the approval process and subsequently approved the Golf. I am lucky that Göttingen is my daily commute ...

Today I picked up the Golf at TÜV Göttingen, it is now fully approved :). This meant I could also grab the (good working, but probably not final) parameter files. Those should only be used in conjunction with the custom firmware that you can find here: https://github.com/BraunsCNC/stm32-sine-prius3 ...

andrewjenkins34 wrote: ↑Mon Jul 25, 2022 3:44 pm Can someone confirm I have this connected correctly?

According to the last image, you connected Enc1 to Cos. I think it needs to be Enc1 to Sin and Enc2 to Cos (the labels are correct, the text right beside it is not.

I did a calibration of the inverter temperature sensor and now MG2 can deliver 400A easily and temperatures keep below 40°C while driving. At temperatures above 100°C, the inverter trips out on its own so the calibration seems about right.

At high syncadv (around 25), the inverter is able to push ...

I have noticed JK BMS has a GND line on their CAN connection. Maybe this would require to be connected to a shield sock along the cable?

GND on the JKBMS should be connected to the GND of your controller. It may be a differential signal, but high absolute voltage differences between the BMS ...

Would you mind sharing your code for JK BMS integration? I am looking of a way to connect CAN info from 5 modules.


I have attached the code that I was running on an Arduino Nano with an MCP2515 CAN module. I tried different things there and this is not something to put into a car. It works, but ...

A short update on the Golf: After trying out many different firmware variants, I am now not using any MTPA formula, but the idiqsplit firmware linked in one of the posts above. I haven’t had luck with any kind of field-weakening controller, but increasing syncadv above any reasonable value always ...

Thinking about my previous tests, I guess that it would have been best to use idiqsplit=0 to test the FW. Because id is only used for field weaking, it makes sense to leave it completely to the FW-controller and just define iq with the gas pedal. However, when I use idiqsplit=0, ud already maxes out ...

Yes, I can confirm that there is basically no effect. Whenever FW kicks into action, ud gets or is already maxed out. So even when switching fwkp around, between values of 0, 10 and 20, there is no difference noticeable. Only when getting to fkwp=30 (where ifw~120A), the rattle and oscillations ...

I tried again with idiqsplit down to 20% and fwkp up to 400. There is no change in the behavior, ifw still maxes out at 4 and everything is oscillating heavily. fwki=0 for all tests, as even in standstill any value above 0 causes some rattling in the motor. Below are examples with fwkp=100 and fwkp ...

Thanks for the plot. I'm assuming it's with the last firmware 5.23.B?


I don’t know the version number, but it was the firmware before the sqrt fix.

I just tried the newest firmware with the fix. First I wanted to optimize syncofs and syncadv: I started with syncadv = 0. I accelerated normally ...

Thanks for the quick update.


So it dumped out the maximum possible iq command. That's why it must have been so exciting!


Below is the plot recorded during self-acceleration due to FW. ud is maxed out but uq is not. It rather looks like it has a new minimum value that it can’t fall below ...

What had you set syncadv to?


Syncadv was set to 10.

As the FW controller only adds additional Id while keeping the total current constant, one should be able to simulate it by increasing idiqsplit at higher speeds? I have tried that several times with various values, but never came close to ...

I tried out the new FW at fwkp=10 and fwki=0 with my Gen 3 Prius drivetrain. It created some amazing torque and when I tried to slow the car down, the inverter pulled twice as many amps from the battery than I have ever been able to. Then something tripped out and contactors started to rattle ...

Here is another article which explains the topic of characteristic current, voltage ellipses and field weakening and also presents some formulas:
https://ieeexplore.ieee.org/document/6457462
Especially figure 8 and the related text are great for understanding what’s going on. They also come up ...

And thanks for your work.


Thanks to you for coming in here and trying to help. And for making this ev conversion possible in the first place 😉.

I forgot to mention, but I also tried that. I could not replicate celerons experience, less current always resulted in less power. But I had a look ...