EV Conversion using prius gen 2 inverter/transaxle

Topics concerning the Toyota and Lexus inverter drop in boards
voti
Posts: 76
Joined: Wed Oct 02, 2024 12:35 pm
Has thanked: 13 times
Been thanked: 6 times

Re: EV Conversion using prius gen 2 inverter/transaxle

Post by voti »

RetroZero wrote: Tue Jun 17, 2025 7:53 pm Is this what you used as reference?
viewtopic.php?p=14153#p14153
I connected my resolver the way Damien did in the tutorial video. Is it correct or should I change to
pin 1 = yellow ( enc b)
pin 2= green and brown (sin a and cos a)
pin 3= red ( enc a)
pin 4 = black r1
pin 5 = white r2

For excitation I have blue and pink not black and white.
Attachments
Screenshot_20250617_215936_Gallery.jpg
voti
Posts: 76
Joined: Wed Oct 02, 2024 12:35 pm
Has thanked: 13 times
Been thanked: 6 times

Re: EV Conversion using prius gen 2 inverter/transaxle

Post by voti »

I changed my resolver connection today and connected it as pair discussed in the screenshot attached below.
I tested first without it connected and I got the same results of having the Delta connected light bulbs connected on the inverters three phase output light up and turn off again continuously. The inverter goes into run mode when I set udcsw to 0 and this blinking behavior then starts even before I put any numbers in the manualid. Please see video attached in comment above. On angle when the light bulbs started blinking an angle of 63 degrees showed up even without the resolver connected.

Then after I connected the resolver and shortly after setting udcsw to 0, the light bulbs turn on and they stay lit. This time around they don't blink but they say lit. When testing with a scope the PWM wave shows but it doesn't move. It stays in one position. On angle under spot values the angle was 239 degrees but kept changing by a value of 1 either increasing or decreasing when I pressed refresh even without turning the drive shaft.

I went on to connect the throttle pedal also with the discussed instructions on the screenshot below and tested with both the resolver and the pedal connected. Now the light bulbs didn't turn on and the inverter didn't go to Runmode it stay off even after setting udcsw to 0. While on previous tests I set udcsw to 0 because that was the only way I could get the inverter to go Runmode because even with manual start turned on, the inverter would still be on opmode> OFF.

When I had the throttle connected STATUS on spot values first showed "PotPressed" and on another test it said "UdcBelowUdcSw|PotPressed" .

Please see attached pictures.
Attachments
Screenshot_20250618_104604_Gallery.jpg
Screenshot_20250618_104648_Gallery.jpg
Screenshot_20250618_104739_Gallery.jpg
Screenshot_20250618_104723_Gallery.jpg
Screenshot_20250618_104733_Gallery.jpg
RetroZero
Posts: 882
Joined: Tue Oct 29, 2019 2:48 pm
Location: France
Has thanked: 550 times
Been thanked: 53 times
Contact:

Re: EV Conversion using prius gen 2 inverter/transaxle

Post by RetroZero »

Just to be sure.
You have 2 seperate batteries. 1 for 12v circuit, & another for High Voltage circuit. Can you check that they are well charged.
In spot values, please report back on UDC voltage & Pot1/Pot2.
The pedal should read 0 , if not, it requires setting. I think there is a set-up in the adapter board thread. Once set up correctly, check by pressing the pedal all the way and verify you have 100%
UDC should read the same as your battery ' HV'
Post Reply