Toyota Auris/Yaris Inverter

Auris/Yaris Inverter Board is an open source project to repurpose Toyota Auris/Yaris (and Prius -C , Prius Aqua and Lexus CT200H) inverters for DIY EV use.

These are nearly identical to Toyota Prius Gen 3 inverters with a smaller format logic board to fit under a sloped casing. It is believed to have a smaller main capacitor and hence be of lower power capabilities [* Needs testing to confirm and adding here ]

They are very cheap (<£100 in UK at the start of 2021) and suitable for a variety of EV /Charger and other inverter projects.

The Project consists of a open inverter circuit board (adapted from Prius Gen3 board) and programming which replaces the OEM logic board in the Auris/Yaris inverter.

This allows independent control of mg1 power stage, mg2 power stage, buck/boost converter and the dc/dc converter.

Resources

Support thread is here : https://openinverter.org/forum/viewtopic.php?f=14&t=767

For using it as a charger , thread is here : https://openinverter.org/forum/viewtopic.php?f=14&t=825

Resources and design files on Github : https://github.com/damienmaguire/Yaris-Auris-Inverter

Available on the EVBMW.COM webshop : evbmw.com Yaris/Auris boards in partial built and full kit format.

There is a Auris/Yaris version of the dual motor board which allows both MG1 and MG2 of Toyota transmissions or (any 2 other suitable motors) to be powered by the same inverter, support thread here: https://openinverter.org/forum/viewtopic.php?f=14&t=1051

Timeline

17/05/20 : Prototype build commenced at JLCPCB.

28/06/20 : Block 2 boards with corrections to incorrect pinouts and component values now available from the evbmw webshop. https://www.evbmw.com/index.php/evbmw-w+...+-board-kit

24/09/20 Firmware now available to run the buck/boost module as an AC onboard charger: HERE: https://github.com/celeron55/prius3charger_buck

Uploaded to github : https://github.com/damienmaguire/Yaris-Auris-Inverter

Design files available to Patrons only as of this date. https://www.patreon.com/evbmw

schematic and pcb layout for Dual Motor boards on Github here : https://github.com/damienmaguire/Prius-Gen3-Inverter/tree/master/Small%20board%20V1d

Buildup and setup

Most of the build up /setup is identical to the V1C Prius board here: Toyota Prius Gen3 Board

Also Note

But also note : (Source https://openinverter.org/forum/viewtopic.php?f=14&t=767 )

1. On the Yaris boards (block111 and before) when using resolver you would need to remove the two pullups R30 and R29. See schematic :

https://raw.githubusercontent.com/damie+...+ematic.pdf

2. There is an error on early boards (block 111 and before) : MG1 resistor divider values are wrong. R41 and 42 should be 6k2 not 4k7 and R46 and R45 should be 3k6 not 4k7.

3. The MG2 current sensor socket has the pins reversed. this can be solved by cutting the socket to allow the plug in upside down or by cutting and resoldering the current sensor wires. Plugging them in will kill the -5v output of PS1 (a SGM3204 SOT if you live in china ) or a LM2776DBVT for europe

4. Conn11 is the external hvil which is not used.

5.