Inverter Firmware v4.56.R

[johu]

Decided to draft another release for the simple reason that v4.55.R had broken the charge mode.

Moreover I decided to test the unified FOC firmware in Touran today and after some small correction it seemed to run well. So this is also the first release where you can choose to use FOC!

https://github.com/jsphuebner/stm32-sin ... ag/v4.56.R

[doobedoobedo]

nice

[arber333]

Decided to draft another release for the simple reason that v4.55.R had broken the charge mode.

Moreover I decided to test the unified FOC firmware in Touran today and after some small correction it seemed to run well. So this is also the first release where you can choose to use FOC!

https://github.com/jsphuebner/stm32-sine/tree/v4.56.R

Compiled files please? I would love to test it in Mazda.

[doobedoobedo]

Here you go, zip contains both FOC and SINE variants.

[arber333]

Here you go, zip contains both FOC and SINE variants.

Hi

I dont know why, but i can only upload hex files. Bin files lock up Olimex . Can you upload hex file for FOC?

EDIT: I found Johannes post with both codes here: https://github.com/jsphuebner/stm32-sin ... ag/v4.56.R
My question is if i can use FOC to drive ACIM motor with AB encoder?

tnx

[doobedoobedo]

cool

[johu]

EDIT: I found Johannes post with both codes here: https://github.com/jsphuebner/stm32-sin ... ag/v4.56.R
My question is if i can use FOC to drive ACIM motor with AB encoder?

Oh, wrong link from my side. Will correct it.
Never been tried. Somehow I doubt it will work out of the box because there is no slip being generated (unless FOC magically does that)

[doobedoobedo]

I think I've found a bug in the FOC.

First my setup - arduino with a pot and a button - pot is read and the value is sent via CAN, but only if the button is pressed, otherwise zero is sent. I can plot this as potnom. Quick presses of the pot work as expected. However if I hold the button down for a while then release, the motor continues to run for quite some time. This is different to the experimental FOC branch which worked exactly as expected. I've attached my parameters.

[doobedoobedo]

here is a plot of motor speed vs pot/potnom you can see the motor continues to run at max rpm (in fact rpm actually rises slightly) following zeroing of pot

[johu]

Ah yes. So you set fweak to 15Hz and idweak to 1A/Hz. So above 15Hz it will start injecting field weakening current. Since your syncofs isn't 100% correct this also contains a small torque producing component and your motor keeps spinning. Try setting fweak to 1000 for now to disable that and you should have the old behaviour back.
BTW I found it quite dangerous to rev the permanent magnet motor without load.

[doobedoobedo]

Thanks, I'll give that a go.

In what way dangerous?

[arber333]

Thanks, I'll give that a go.

In what way dangerous?

I think we blew one Volt power stage because of this, despite Fault pin triggering. I had DC link at 380Vdc and i went to 10000rpm and i think backemf were higher than 450Vdc when DC contactor tripped.... Poor inverter.

[doobedoobedo]

Ah OK thanks, I'm running it at 60V on the bench, so I think I should be fairly safe then?

I've started removing all the ICE stuff from the car, slow but steady progress. I won't be going full voltage until the motor is in the car.

[doobedoobedo]

Set fweak=1000 and idweak=0, still doing it .

[johu]

Thanks, I'll give that a go.

In what way dangerous?

So if syncofs is off and commanding pure d-current will also contain a q component, i.e. the motor will spin. Once you get past fweak the inverter maintains a certain, supposed, d-current and there is no way to stop the motor gracefully. You can send the stop command and hope that back EMF is below 2x IGBT max voltage.

[johu]

Set fweak=1000 and idweak=0, still doing it .

Can you try allowing -1% regen?