Help! Prius gen3 inverter using ABZ encoder

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m.art.y
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Re: Help! Prius gen3 inverter using ABZ encoder

Post by m.art.y »

johu wrote: Fri Jan 08, 2021 8:33 am Sorry I forgot, is it a gen2 or gen3 inverter? What motor is it?
Also it is normal for current to be high. Torque needs current no matter if at standstill or at speed. I'm running the Leaf motor at 450A, some run it at 650A (throtcur 6.5).
It is a gen3 inverter. Motor is lerroy somer synchronous with 8 poles. They list motor power as 50 kw @ 3600 rpm. They list motor voltage as 340 V ÷ 432 V. It is a weaker motor but the car is quite light at ~ 800 kg at the moment - it will be heavier as I add more battery.

I think I had motor phases connected wrong. When I finished tuning syncoffs motor was spinning in reverse when inverter said the direction was forward. I tried adding the value to syncoffs to switch the direction but it did not work I guess because mine is sin/cos chip and not a resolver. So thought it did not matter and decided to swap the 'labels' on my gear shift lever instead. I noticed then that it was willing to spin in reverse (forward on inverter) much better. So I swapped the phases, found another syncoffs value and it runs much better now. I increased throtcur to 2 and I only saw 80 -100 A on il1 and il2 plot when pulling away from a standstill and not 200 A like before. And motor has torque! It does drive in the snow quite well considering it only has ~280 V on the battery and it is a weaker motor. Will have to do more testing and tuning but overall very pleased 🙂 Thank you very much
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