Tesla-Drive-Unit

Open Source logic board for the Tesla Model S large rear drive unit. PCB Files in DesignSpark 8 format. Based on the inverter designed by Johannes Heubner using slip control.

Software may be downladed here: https://github.com/jsphuebner/stm32-sine/releases

Support forum : https://openinverter.org/forum/

29/07/17 : V1 files released. Please note that as of this date the design is completely untested. Use at your own risk for education purposes only. Further updates when testing starts and future versions are released.

10/08/17 : While functional the V1 board will not correctly read the Tesla current sensors as they are Sigma - Delta ADC as opposed to analog. Other issues with the design include spurious triggering of the fault detection lines due to switching noise.Solutions to these problems along with some upgrades are on the way in the V2. Stay tuned:)

19/08/17 : V2 files for the Large drive unit board released. Same discalimer as before : untested , for educational use only. If you blow up your house , cat or car with this design I accept no responsibility. Major upgrades over the V1 :

Three stage active filter to recover current sensor analog values from Sigma Delta encoding.

Variable frequency clock generator for Sigma Delta converters.

Buffer on IGBT drive lines.

All temp sensors read via a dual 4:1 multiplexer.

Crusie control input.

Jumper selectable CAN or RS232 communication.

10/09/17 : The V2 board has passed all bench tests and works well. Not tested in a car as yet.

23/09/17 : Creep and cruise control working on bench tests with inverter back in drive unit. Released beta software .bin file and paramaters for low voltage and high voltage testing. Not yet ran in a car. Same discalimer as before : untested , for educational use only. If you blow up your house , cat or car with this design I accept no responsibility.

30/09/17 : Uploaded a spreadsheet with resistance / temperature values for the inverter heatsink and motor case for the large drive unit.

01/10/17 : Uploaded latest software build with working temperature sensors.

26/10/17 : Uploaded latest software build and document detailing CAN message formats.

03/11/17 : Link to source code for those interested : http://johanneshuebner.com/quickcms/index.html%3Fen_downloads,14.html Note I do not write the software. It is however fully open source and available from the link above.

25/11/17 : Started the documentation. Work in progress as the project evolves.

09/12/17 : First test drive in car a success. Uploaded series of wiring diagrams.

29/12/17 : Uploaded design files for V3 board. Jut one change :

ULN2003 replaced by NCV8401ADT for driving precharge relay and main contactor following in car testing.

Happy new year :)

02/05/18 : V2 board tested in my BMW E31 project car to over 100mph :)

19/08/18 : Multiple applications in motorsport now up and running. Added parameter file for drifting:)

17/09/18 : Running on the dyno : https://www.youtube.com/watch?v=2bLPXOGVxLI

23/06/19 : V4a design files released. Now features on board WiFi and CAN control. Support Forum : https://openinverter.org/forum/

21/01/20 : V4b design files now released. Both fully built and partial built boards available from the EVBMW webshop : https://www.evbmw.com/index.php/evbmw-webshop Don't want to buy from me and support ongoing development? That's ok as this release also includes the BOM, CPL and Gerber files needed to build your own at JLCPCB : https://jlcpcb.com

Have fun :)

Copyright (C) 2017  Damien Maguire and Johannes Huebner

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.